CN118883042A - Fatigue torque detection device for EMB and working method thereof - Google Patents

Abstract

The invention belongs to the technical field of torque detection, and particularly relates to a fatigue torque detection device for EMB and a working method thereof, wherein the fatigue torque detection device for EMB comprises: the device comprises a base and a supporting seat, wherein a rotating shaft is connected to the supporting seat; a torque sensor connected with the control module is arranged on the rotating shaft, one end of the rotating shaft is coaxially connected with a mounting disc, and a brake disc is coaxially arranged on the mounting disc; the movable seat is provided with a brake pad; a detection mechanism, comprising: the detection ring is in threaded connection with the rotating shaft, a pressure sensor connected with the control module is arranged on one side, facing the brake disc, of the detection ring, and the fatigue torque detection device for EMB preheats and cleans the back of the brake disc through the forward movement of the detection ring so as to simulate the difference of the temperatures of the front and back of the brake disc in an actual scene; and acquiring the end face runout data of the brake disc by detecting pressure data generated by the movement of the brake pad in the channel.

Description

Fatigue torque detection device for EMB and working method thereof

Technical Field

The present invention belongs to the technical field of torque detection, and specifically relates to detecting torque through dynamic or static balance, and more particularly to a fatigue torque detection device for EMB and a working method thereof.

Background Art

Brake discs and brake pads are core components in the braking process. During the experimental stage, fatigue torque testing of brake discs is required to evaluate the ability of brake discs to withstand torque during long-term use or repeated braking. This test can reveal the performance degradation of brake discs under fatigue conditions and their lifespan under repeated loads.

The existing fatigue torque detection device obtains the rotational torque of the brake disc by setting a torque detection sensor coaxially connected to the brake disc, and determines the performance degradation of the brake disc based on the detection data.

However, since fatigue torque testing requires repeated application of torque to the brake disc to simulate the long-term use conditions of the brake disc, and in the actual test process, the actual environmental state of the brake disc cannot be well simulated, the degree of simulation of the actual situation of the fatigue torque test cannot be satisfied; for example: during the actual driving of the car, the temperature of the brake disc facing the inside of the car is higher than the temperature of the side facing the outside of the car, and the temperature of the brake disc should be higher than the temperature of the brake pad, while the detection device in the related technology has the same temperature inside and outside the brake disc at the initial start-up, and since the brake disc is installed on the detection tooling, the temperature inside the brake disc will also drop rapidly, that is, without the obstruction of the car frame, resulting in its temperature being lower than that in the actual situation, and, in actual situations, the cleanliness of the outside of the brake disc should also be worse than that of the inside of the brake disc. This is because during actual driving, external dust and dirt will splash on the outside of the brake disc.

In order to solve the above problem, in the related art, before the fatigue torque test of the brake disc is carried out, an additional heating device is used to preheat the brake disc as a whole before installing it on the detection device for detection. However, this method causes the temperature inside and outside the brake disc to increase as a whole, which cannot simulate the actual working conditions.

Therefore, how to solve the technical problem that the existing detection devices cannot simulate actual working conditions is urgently needed to be solved by technical personnel in this field.

It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art.

Summary of the invention

The embodiments of the present disclosure at least provide a fatigue torque detection device for EMB and a working method thereof.

In a first aspect, an embodiment of the present disclosure provides a fatigue torque detection device for EMB, comprising: a base; a support base, which is arranged on the base, and a rotating shaft is connected to the support base for horizontal rotation, and the rotating shaft is driven to rotate by a servo motor installed on the support base; wherein a torque sensor connected to a control module is arranged on the rotating shaft, and a mounting disk is coaxially connected to one end of the rotating shaft, and a brake disk is coaxially arranged on the mounting disk; a movable base, which is located on the base and a brake pad is arranged on it; a detection mechanism, which comprises: a detection ring threadedly connected to the rotating shaft, and a pressure sensor connected to the control module is arranged on the side of the detection ring facing the brake disk; when the rotating shaft rotates forward, the detection ring translates toward the back of the brake disk, and disengages from the meshing when in contact and rubs against the back of the brake disk; when the rotating shaft is reversed, the detection ring moves away from the brake disk, and rotates with the rotating shaft after leaving a detection channel, and at the same time, the movable base drives the brake pad to extend into the detection channel to clamp the brake disk, and the control module obtains the end face runout data of the brake disk through the pressure sensor and the torque data of the brake disk through the torque sensor.

In an optional embodiment, the detection ring is located between the brake disc and the support seat; a guide member is provided on the side of the support seat facing the mounting disc, and the guide member is inserted into the detection ring to enable the detection ring to move when the shaft rotates.

In an optional embodiment, an annular chamber is opened inside the detection ring, and an annular channel is opened on the side of the annular chamber facing the support seat; the guide piece is "J" shaped, extends into the annular chamber through the annular channel and then passes through the inner wall of the annular chamber.

In an optional embodiment, a threaded section is provided on the rotating shaft between the mounting plate and the supporting seat; when the rotating shaft rotates forward, the detection ring moves from the threaded section toward the brake disc and contacts the brake disc when just moving out of the threaded section.

In an optional embodiment, a magnetic member is provided on the side of the mounting disk facing the detection ring, and the magnetic member repels the detection ring; when the rotating shaft reverses, the detection ring is pushed by the magnetic member to re-engage with the threaded segment to move away from the brake disc, and rotates with the rotating shaft when disengaged from the guide member.

In an optional embodiment, a plurality of debris removal channels are provided along a radial direction on a side of the detection ring facing the brake disc.

In an optional embodiment, a side of the detection ring away from the brake disc is provided with a plurality of blades along its radial direction to dissipate heat from the bearing in the support seat when the detection ring rotates with the rotating shaft; and the detection ring blocks the lubricating oil thrown out of the support seat due to the rotation of the bearing.

In an optional implementation, the brake pad is in a "U" shape, and one side thereof is gap-matched with the detection channel.

In an optional embodiment, the guide member includes: an axial connecting rod, a radial connecting rod and an axial guide rod; wherein one end of the axial connecting rod is connected to the support seat, and the other end extends into the annular chamber; one end of the radial connecting rod is connected to the axial connecting rod, and the other end is connected to the axial guide rod, and the axial guide rod is located in the annular chamber and passes through the annular chamber.

On the second aspect, the embodiment of the present disclosure also provides a working method of the fatigue torque detection device for EMB as described above, which includes: when the rotating shaft rotates forward, the detection ring translates toward the back side of the brake disc, and disengages and rubs against the back side of the brake disc when in contact; when the rotating shaft reverses, the detection ring moves away from the brake disc, and rotates with the rotating shaft after leaving a detection channel, and at the same time, the moving seat drives the brake pad to extend into the detection channel to clamp the brake disc, and the control module obtains the end face runout data of the brake disc through the pressure sensor and obtains the torque data of the brake disc through the torque sensor.

The beneficial effect of the present invention is that, during the torque detection process, the EMB fatigue torque detection device and the working method thereof preheat and clean the back of the brake disc by moving the detection ring forward to simulate the temperature difference between the front and back of the brake disc in an actual scenario. At the same time, a detection channel is generated by moving the detection ring backward, and the end face runout data of the brake disc is obtained through the pressure data generated by the movement of the brake pad therein.

Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, this article specifically cites preferred embodiments and provides detailed descriptions as follows in conjunction with the attached drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic structural diagram of a fatigue torque detection device for EMB provided in an embodiment of the present disclosure;

FIG2 is a cross-sectional view of a fatigue torque detection device for EMB provided in an embodiment of the present disclosure;

FIG3 is a three-dimensional diagram of a detection ring provided by an embodiment of the present disclosure when it is in conflict with a brake disc;

FIG4 is a cross-sectional view of a detection ring provided by an embodiment of the present disclosure when there is no interference with a brake disc;

FIG5 is a cross-sectional view of a detection ring provided by an embodiment of the present disclosure when it is in conflict with a brake disc;

FIG6 is a cross-sectional view of a detection ring provided by an embodiment of the present disclosure when it is separated from a guide member;

FIG. 7 is a cross-sectional view of a brake pad provided by an embodiment of the present disclosure when in conflict with a brake disc.

In the figure:

Base 1, support base 11, servo motor 12, bearing 13;

Rotating shaft 2, mounting plate 21, brake plate 22, threaded section 23;

Moving seat 3, brake pad 31;

Detection ring 41, annular chamber 411, annular channel 412, impurity removal channel 413, blades 414, detection channel 42, guide member 43, axial connecting rod 431, radial connecting rod 432, axial guide rod 433, magnetic member 44;

Torque sensor 5.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

EMB is: electronic mechanical brake system.

It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, in the drawings, the thickness of the components may be exaggerated or reduced in order to effectively describe the technical content.

Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

As shown in Fig. 1 and Fig. 2, at least one embodiment provides a fatigue torque detection device for EMB, which includes: a base 1 and a support base 11 arranged on the base 1, a rotating shaft 2 is horizontally rotatably connected to the support base 11, and the rotating shaft 2 is driven to rotate by a servo motor 12 installed on the support base 11; a torque sensor 5 connected to the control module is arranged on the rotating shaft 2, one end of the rotating shaft 2 is coaxially connected to a mounting plate 21, and a brake disc 22 is coaxially arranged on the mounting plate 21; a moving base 3 is located on the base 1, and a brake pad 31 is arranged on it; a detection mechanism, which includes: A detection ring 41 is threadedly connected to the rotating shaft 2, and a pressure sensor connected to the control module is arranged on the side of the detection ring 41 facing the brake disc 22; when the rotating shaft 2 rotates forward, the detection ring 41 translates toward the brake disc 22, and preheats and cleans the back side of the brake disc 22 when in contact; when the rotating shaft 2 rotates reversely, the detection ring 41 moves away from the brake disc 22, and rotates with the rotating shaft 2 after leaving the detection channel 42, and at the same time, the moving seat 3 drives the brake pad 31 to extend into the detection channel 42 and contact the brake disc 22, and the control module detects the end face runout of the brake disc 22 through the data obtained by the pressure sensor.

Specifically, the brake disc 22 and the brake pad 31 are first installed on the mounting plate 21 and the movable seat 3 respectively, and the back side of the brake disc 22 is the side facing the inside of the car in the actual use scenario; then the control module controls the servo motor 12 to drive the rotating shaft 2 to rotate forward. Since the detection ring 41 is threadedly connected to the rotating shaft 2 and a guide member 43 is provided on the detection ring 41, the detection ring 41 can be translated along the axial direction of the rotating shaft 2. When the detection ring 41 conflicts with the back side of the brake disc 22, the detection ring 41 just moves out of the threaded section 23 of the rotating shaft 2, that is, the detection ring 41 makes the back side of the brake disc 22 heat up by friction with the back side of the brake disc 22, so as to simulate the different temperatures between the front and back sides of the brake disc 22 in the actual scenario. At the same time, the friction between the detection ring 41 and the back side of the brake disc 22 can also clean the back side of the brake disc 22, so as to simulate the smooth back side of the brake disc 22 in the actual scenario.

And, when the back of the brake disc 22 is preheated and cleaned, the control module controls the servo motor 12 to drive the rotating shaft 2 to reverse, so that the detection ring 41 moves away from the brake disc 22 along the guide member 43 until the detection ring 41 breaks away from the guide member 43 and rotates with the rotating shaft 2. At this time, the gap between the detection ring 41 and the brake disc 22 is the detection channel 42. Then the control module controls the moving seat 3 to move so that the brake pad 31 on it is inserted into the detection channel 42 and clamps the brake disc 22, that is, the brake pad 31 is used to load the brake disc 22 to simulate the actual braking scenario; finally, during the detection process, the data obtained by the torque sensor can determine the performance degradation of the brake disc, and at the same time, the pressure sensor can also determine the vibration of the end face of the brake disc, that is, when the end face of the brake disc 22 vibrates, it will drive the brake pad 31 to contact the detection ring 41, and the pressure sensor on the detection ring 41 will obtain a pressure data. When the pressure data exceeds the threshold, it indicates that the end face vibration data of the brake disc 22 has reached the limit, that is, the life of the brake disc 22 has reached the limit.

As shown in FIG. 7 , in some embodiments, the brake pad 31 is in a “U” shape, and one side thereof is gap-fitted with the detection channel 42 .

Specifically, the moving seat 3 drives the "U"-shaped brake pad 31 to move, so that one side of the brake pad 31 extends into the detection channel 42 and then clamps the brake disc 22; wherein, the moving seat 3 can be set on a slide rail, and a lifting cylinder is provided thereon, and the brake pad 31 is set at the end of the lifting cylinder, that is, the brake pad 31 moves horizontally and vertically to the position in the figure, and then clamps the brake disc 22.

As shown in FIG. 3 , in some embodiments, the detection ring 41 is located between the brake disc 22 and the support seat 11 ; a guide member 43 is provided on the side of the support seat 11 facing the mounting disc 21 , and the guide member 43 is inserted into the detection ring 41 so that the detection ring 41 moves when the rotating shaft 2 rotates.

Specifically, the detection ring 41 is sleeved on the rotating shaft 2 and threadedly connected thereto. When a fixed guide member 43 is passed through the detection ring 41 , the rotation of the rotating shaft 2 will drive the detection ring 41 to translate.

As shown in Figure 4, in some embodiments, an annular chamber 411 is opened inside the detection ring 41, and an annular channel 412 is opened on the side of the annular chamber 411 facing the support seat 11; the guide member 43 is "J"-shaped, extending into the annular chamber 411 through the annular channel 412 and then passing through the inner wall of the annular chamber 411.

As shown in Figure 7, in some embodiments, the guide member 43 includes: an axial connecting rod 431, a radial connecting rod 432 and an axial guide rod 433; wherein one end of the axial connecting rod 431 is connected to the support seat 11, and the other end extends into the annular chamber 411; one end of the radial connecting rod 432 is connected to the axial connecting rod 431, and the other end is connected to the axial guide rod 433, and the axial guide rod 433 is located in the annular chamber 411 and passes through the annular chamber 411.

Specifically, when the axial guide rod 433 of the guide member 43 passes through the detection ring 41, the rotation of the shaft 2 will only drive the detection ring 41 to translate; when the axial guide rod 433 of the guide member 43 is separated from the detection ring 41, the rotation of the shaft 2 will only drive the detection ring 41 to rotate.

As shown in FIG. 5 , in some embodiments, a threaded segment 23 is provided on the rotating shaft 2 between the mounting plate 21 and the supporting seat 11 ; when the rotating shaft 2 rotates forward, the detection ring 41 moves from the threaded segment 23 toward the brake disc 22 , and contacts the brake disc 22 when just moving out of the threaded segment 23 .

Specifically, in order to achieve friction between the detection ring 41 and the back of the brake disc 22, the threaded sections 23 cannot be completely provided on the rotating shaft 2. A smooth side wall needs to be provided close to the mounting disc 21 so that the detection ring 41 will no longer move due to the rotation of the rotating shaft 2.

As shown in FIG6 , in some embodiments, a magnetic member 44 is provided on the side of the mounting disk 21 facing the detection ring 41, and the magnetic member 44 repels the detection ring 41; when the rotating shaft 2 reverses, the detection ring 41 engages with the threaded segment 23 through the push of the magnetic member 44 to move away from the brake disc 22, and rotates with the rotating shaft 2 when disengaging from the guide member 43.

Specifically, when the shaft 2 reverses, the detection ring 41 needs to be driven to translate, but at this time the detection ring 41 is separated from the threaded section 23 of the shaft 2, so the magnetic member 44 is provided to repel the detection ring 41 to push the detection ring 41 to re-engage with the threaded section 23.

As shown in FIG. 3 , in some embodiments, a detection ring 41 has a side facing the brake disc 22 and has a plurality of impurity discharge channels 413 formed along its radial direction to facilitate the discharge of impurities generated by friction between the two.

In some embodiments, a plurality of blades 414 are radially arranged on one side of the detection ring 41 away from the brake disc 22 to dissipate heat from the bearing 13 in the support seat 11 when the detection ring 41 rotates with the rotating shaft 2; and the detection ring 41 blocks the lubricating oil thrown out of the support seat 11 due to the rotation of the bearing 13.

Specifically, the bearing 13 will generate heat after working for a long time, thereby affecting the coaxiality, so the blades 414 on the detection ring 41 are used to dissipate the heat. At the same time, the presence of the detection ring 41 can also block the lubricating oil thrown out of the bearing 13, preventing the lubricating oil from contaminating the workpiece under detection and affecting the detection result.

At least one embodiment also provides a working method of a fatigue torque detection device for EMB, which includes: when the rotating shaft 2 rotates forward, the detection ring 41 translates toward the brake disc 22, and disengages and rubs against the back side of the brake disc 22 when in contact; when the rotating shaft 2 rotates reversely, the detection ring 41 moves away from the brake disc 22, and rotates with the rotating shaft 2 after leaving a detection channel 42, and at the same time, the moving seat 3 drives the brake pad 31 to extend into the detection channel 42 to clamp the brake disc 22, and the control module detects the end face runout of the brake disc 22 through the data obtained by the pressure sensor.

In summary, during the torque detection process, the EMB fatigue torque detection device and working method preheat and clean the back of the brake disc 22 by moving the detection ring 41 forward to simulate the temperature difference between the front and back of the brake disc 22 in an actual scenario. At the same time, a detection channel 42 is generated by moving the detection ring 41 backward, and the end face runout data of the brake disc 22 is obtained through the pressure data generated by the movement of the brake pad 31 therein.

In this article, when it is mentioned that the first component is located on the second component, this can mean that the first component can be directly formed on the second component, or the third component can be inserted between the first component and the second component. In this article, when an element or layer is referred to as "located", "engaged to", "connected to", "attached to" or "coupled to" another element or layer, it can be directly located, engaged, connected, attached or coupled to another element or layer, or there may be an intermediate element or layer. On the contrary, when an element is referred to as "directly on another element or layer", "directly engaged to", "directly connected to", "directly attached to" or "directly coupled to" another element or layer, there may be no intermediate element or layer. Other words used to describe the relationship between elements should be interpreted in a similar manner (for example, "between" to "directly between", "adjacent" to "directly adjacent", etc.). As used herein, the term "and/or" includes any and all combinations of one or more related listed items.

Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and/or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and/or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, terms such as "first", "second" and other numerical terms do not imply an order or sequence when used in this document unless explicitly indicated above. Therefore, without departing from the teachings of the example embodiments, the first element, component, region, layer or section discussed above may be referred to as a second element, component, region, layer or section.

Spatially relative terms, such as "inside", "outside", "below", "below", "down", "above", "on", etc., may be used herein to facilitate description of the relationship of one element or feature to another element or feature as illustrated in the figure. In addition to the orientation depicted in the figure, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is turned over, the elements described as "below" or "below" other elements or features will be oriented to be "above" other elements or features. Therefore, the example term "below" can cover the orientation above and below. The device can be oriented in other ways (rotated 90 degrees or in other orientations), and the spatially relative descriptors used herein are interpreted accordingly.

In the above discussion, unless otherwise stated, the terms "about", "approximately", "substantially" and the like when used to describe data represent a variation of +/- 10% of the value.

Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims (10)

1. An EMB fatigue torque detection device, comprising:

A base;

The support seat is arranged on the base, a rotating shaft is horizontally connected to the support seat in a rotating mode, and the rotating shaft is driven to rotate by a servo motor arranged on the support seat; the rotating shaft is provided with a torque sensor connected with the control module, one end of the rotating shaft is coaxially connected with a mounting disc, and a brake disc is coaxially arranged on the mounting disc;

the movable seat is positioned on the base and is provided with a brake pad;

A detection mechanism, comprising: the detection ring is in threaded connection with the rotating shaft, and one side of the detection ring, facing the brake disc, is provided with a pressure sensor connected with the control module;

when the rotating shaft rotates positively, the detection ring translates towards the back of the brake disc, and is disengaged when in contact and rubs with the back of the brake disc;

When the rotating shaft reverses, the detection ring moves away from the brake disc and rotates along with the rotating shaft after the detection channel is reserved, meanwhile, the movable seat drives the brake pad to extend into the detection channel to clamp the brake disc, and the control module acquires end face runout data of the brake disc through the pressure sensor and acquires torque data of the brake disc through the torque sensor.

2. The fatigue torque detecting device for EMB according to claim 1, wherein,

The detection ring is positioned between the brake disc and the supporting seat;

the supporting seat is provided with a guide piece towards one side of the mounting plate, and the guide piece is inserted into the detection ring so that the detection ring moves when the rotating shaft rotates.

3. The fatigue torque detecting device for EMB according to claim 2, wherein,

An annular chamber is formed in the detection ring, and an annular channel is formed in one side, facing the supporting seat, of the annular chamber;

the guide piece is J-shaped, and extends into the annular cavity through the annular channel and then penetrates out of the inner wall of the annular cavity.

4. The fatigue torque detecting device for EMB according to claim 3, wherein,

A thread section is arranged on the rotating shaft between the mounting plate and the supporting seat;

when the rotating shaft rotates positively, the detection ring moves from the threaded section towards the brake disc and collides with the brake disc when the threaded section is just removed.

5. The fatigue torque detecting device for EMB according to claim 4, wherein,

A magnetic part is arranged on one side of the mounting plate, facing the detection ring, and the magnetic part and the detection ring repel each other;

When the rotating shaft is reversed, the detection ring is re-meshed with the threaded section by pushing of the magnetic piece so as to be far away from the brake disc, and rotates along with the rotating shaft when the detection ring is separated from the guide piece.

6. The fatigue torque detecting device for EMB according to claim 4, wherein,

The detection ring faces one side of the brake disc, and a plurality of impurity discharging channels are formed along the radial direction of the detection ring.

7. The fatigue torque detecting device for EMB according to claim 5, wherein,

The detection ring is arranged on one side far away from the brake disc, and a plurality of blades are radially arranged on the detection ring so as to radiate heat of a bearing in the support seat when the detection ring rotates along with the rotating shaft; and

The detection ring blocks lubricating oil thrown out of the supporting seat due to rotation of the bearing.

8. The fatigue torque detecting device for EMB according to claim 1, wherein,

The brake pad is U-shaped, and one side of the brake pad is in clearance fit with the detection channel.

9. The fatigue torque detecting device for EMB according to claim 3, wherein,

The guide includes: the axial connecting rod, the radial connecting rod and the axial guide rod; wherein the method comprises the steps of

One end of the axial connecting rod is connected with the supporting seat, and the other end of the axial connecting rod extends into the annular cavity;

one end of the radial connecting rod is connected with the axial connecting rod, the other end of the radial connecting rod is connected with the axial guide rod, and the axial guide rod is positioned in the annular cavity and penetrates out of the annular cavity.

10. A method of operating the EMB fatigue torque detection device as recited in claim 1, comprising:

when the rotating shaft rotates positively, the detection ring translates towards the brake disc, and is disengaged when in contact and rubs with the back surface of the brake disc;

When the rotating shaft reverses, the detection ring moves away from the brake disc and rotates along with the rotating shaft after the detection channel is reserved, meanwhile, the movable seat drives the brake pad to extend into the detection channel to clamp the brake disc, and the control module acquires end face runout data of the brake disc through the pressure sensor and acquires torque data of the brake disc through the torque sensor.