CN207853630U - An easy-to-dissipate sensory brushless motor - Google Patents

Abstract

The utility model discloses a kind of fugitive hot type thoughts brushless motors, solve the hot gas being discharged in the prior art and easily reenter in the alternate cycle of air-flow, and then the problem for causing motor radiating ineffective.Its key points of the technical solution are that including external stator component, shaft and the drive end bearing bracket and rear end cap worn for shaft, the external stator component includes stator, the drive end bearing bracket is connected through fastener with rear end cap and the fixed both ends for being set in stator, the drive end bearing bracket and rear end cap offer air inlet hole and exhaust vent respectively, described that exhausting component is equipped in the shaft of drive end bearing bracket side positioned at the rear end cap；The exhausting component includes the extraction fan being installed in shaft and the wind scooper that is covered in extraction fan on flabellum, the center of the wind scooper offers exhaust outlet, reach and the track flowed through after gas is discharged by change, it avoids the hot gas of discharge from being again introduced into motor, and then improves the purpose of motor radiating effect.

Description

An easy-to-dissipate sensory brushless motor

technical field

The utility model relates to the field of motors, in particular to an easy-to-dissipate sensory brushless motor.

Background technique

A DC motor is a rotating electrical machine that can convert DC electrical energy into mechanical energy or convert mechanical energy into DC electrical energy. DC motors are divided into DC brush motors and DC brushless motors. Among them, DC brushless motors have the advantages of high efficiency, low noise, and reliable operation. In recent years, they have been widely used and developed rapidly. Among them, they are widely used in screw guns.

After the motor is used for a long time, it will generate a certain amount of heat, and the heat of the motor will affect the service life of the motor. Therefore, the motors on the market generally have heat dissipation structures or add exhaust components. Alternate, in order to speed up the heat dissipation of the motor, but if the exhausted gas is not properly treated, it is very easy to cause the exhausted hot air to re-enter the alternating air flow cycle, which will lead to the problem of poor heat dissipation.

Utility model content

The purpose of the utility model is to provide an easy-to-dissipate sensory brushless motor. By changing the trajectory of the discharged gas, it can prevent the discharged hot gas from entering the motor again, thereby improving the heat dissipation effect of the motor.

The above-mentioned technical purpose of the utility model is achieved through the following technical solutions: an easy-to-dissipate sensory brushless motor, including an outer stator assembly, a rotating shaft, and a front end cover and a rear end cover for the rotating shaft to pass through, the outer stator The assembly includes a stator, the front end cover and the rear end cover are connected by fasteners and fixedly sleeved at both ends of the stator, the front end cover and the rear end cover are respectively provided with air inlet holes and air outlet holes, located at the rear An exhaust assembly is installed on the rotating shaft on the side of the end cover facing away from the front end cover; the exhaust assembly includes an exhaust fan mounted on the rotating shaft and an air guide cover covering the blades of the exhaust fan. The center of the air guide cover is opened There are exhaust vents.

By adopting the above technical scheme, the front end cover in the motor is provided with an air inlet hole, the rear end cover in the motor is provided with an air hole, and the rear end cover is provided with an exhaust assembly, the exhaust assembly includes an exhaust fan and an air guide cover, and the air guide The hood has an exhaust port that communicates with the air outlet. Its working principle: start the motor to drive the exhaust assembly to work. The low-temperature air outside the motor enters the motor from the air inlet and is discharged from the air outlet. At this time, the air flows That is to say, the hot air brought out of the motor is discharged from the air outlet, and due to the setting of the air outlet, the hot air is concentrated and discharged along the direction of the air outlet, and because of the close-range blowing of the exhaust fan after starting, the hot air is blown toward the air outlet. Flow away from the direction of the motor, so hot air can be avoided from repeatedly entering the motor, thereby improving the heat dissipation effect of the motor.

A further setting of the present invention is that an integrated circuit board is arranged between the front end cover and the end face of the stator, and the air inlet hole includes an air inlet gap between the end face of the stator and the integrated circuit board and an air inlet gap located at the back of the integrated circuit board. Cooling clearance on the stator side.

By adopting the above-mentioned technical scheme, an integrated circuit board is provided to regulate and control the motor, and because the integrated circuit board also generates a certain amount of heat during use, the integrated circuit board is exposed at the air inlet, so that the air inlet It is divided into air intake gap and heat dissipation gap. The air intake gap prevents the integrated circuit board from affecting the cold air entering the motor, and the heat dissipation gap speeds up the heat dissipation of the integrated circuit board.

The utility model is further provided that the outer stator assembly includes a coil group wound on the stator, and the stator has a winding frame arranged along the axial direction of the stator for each coil in the coil group to be wound around. There is a ventilation gap communicated with the air inlet gap and the air outlet hole between the two bobbins.

By adopting the above technical solution, the stator has a winding frame, and the winding frame has a ventilation gap, so that the ventilation gap can communicate with the heat dissipation gap to realize the flow of air in the motor.

The further setting of the present invention is that a front insulating frame and a rear insulating frame are correspondingly arranged between the stator and the integrated circuit board and the rear end cover, and the front insulating frame and the rear insulating frame both include a frame plate and a side of the disc to abut the top ring on the end face of the IC board/back end cap.

By adopting the above-mentioned technical scheme, the front insulating frame and the rear insulating frame are set, and the function of insulation is first realized, and at the same time, the front insulating frame is prevented from directly contacting the end surface of the integrated circuit board or the rear end cover through the top ring in the front insulating frame and the rear insulating frame , to prevent the heat on the integrated circuit board from being transferred to the stator, and to make the ventilation gap communicate with the air outlet of the rear end cover, increase the gap for air circulation in the motor, and increase the heat dissipation area.

A further setting of the present invention is that the top ring is mainly composed of a plurality of dislocated top plates, and there are ventilation passages between the top plates, and the frame plate has ventilation openings communicating with the ventilation gaps.

By adopting the above technical solution, the top ring is composed of a top plate and has a ventilation channel, so that the air on both sides of the top ring can flow through each other, improve the heat dissipation effect between the inside and outside of the front insulating frame and the rear insulating frame, and set up a vent to make the ventilation gap and heat dissipation Increased clearance for circulation between gaps ensures smooth air flow.

A further setting of the present invention is that, on the side of the frame plate facing away from the top ring, there is an insert ring inserted into the ventilation gap along the axial direction at the ventilation opening.

By adopting the above technical solution, the insert ring is set, and the insert ring is arranged at the vent, so that the front insulating frame or the rear insulating frame is plugged and matched with the stator, ensuring that the three remain relatively static.

A further setting of the present utility model is that, the surface of the stator is provided with a relief groove for insertion of fasteners.

By adopting the above-mentioned technical scheme, a relief slot is provided for the insertion of fasteners, so that the stator, the front end cover and the rear end cover are tightly connected, avoiding relative rotation between the stator and the front end cover or the rear end cover, and at the same time effectively saving the occupation of the motor space.

A further setting of the present invention is that the centers of the front end cover and the rear end cover respectively have a first slot and a second slot for the bearing on the rotating shaft to be placed.

In summary, the utility model has the following beneficial effects: an air inlet hole is provided on the front end cover, an air outlet hole is opened on the rear end cover, and an exhaust assembly is arranged at the rear end cover, the exhaust assembly includes an exhaust fan and an air guide cover, and the air guide The wind hood has an air outlet connected to the air outlet. Due to the setting of the air outlet, the hot air is concentrated and discharged along the direction of the air outlet, and because of the short-distance blowing after the exhaust fan is started, the hot air is blown to the side far away from the motor. Direction flow, so hot air can be avoided to repeatedly enter the motor, thereby improving the cooling effect of the motor.

Description of drawings

Fig. 1 is the schematic diagram of the utility model;

Fig. 2 is the first exploded view of the utility model;

Fig. 3 is the enlarged view of place A in Fig. 2;

Fig. 4 is a second exploded view of the utility model.

In the figure, 1, stator; 11, winding frame; 12, ventilation gap; 13, give way slot; 2, rotor; 3, rotating shaft; 4, front end cover; 41, air inlet hole; 411, air inlet gap; 412 , heat dissipation gap; 42, the first slot; 5, the rear end cover; 51, the air outlet; 52, the second slot; 6, the integrated circuit board; 7a, the front insulating frame; 7b, the rear insulating frame; 71, Frame plate; 72, insert ring; 73, top ring; 731, top plate; 74, air vent; 75, air duct; 8, exhaust assembly; 81, exhaust fan; 9. Fasteners.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

As shown in Figures 1 and 2, an easy-to-dissipate sensory brushless motor includes a rotating shaft 3, on which a rotor 2 is fixedly mounted, and an outer stator 1 assembly is provided outside the rotor 2, and the outer stator 1 assembly includes a casing The stator 1 outside the rotor 2 and the coil group wound on the stator 1, the two ends of the stator 1 are sleeved and fixed respectively with the front end cover 4 and the rear end cover 5 for the rotating shaft 3 to pass through, and the front end cover 4 and the rear end cover 5 The rear end cover 5 is connected by a fastener 9. In this embodiment, the fastener 9 is a screw, and the outer surface of the stator 1 is distributed with six relief grooves 13 arranged axially along the stator 1 for fastening Item 9 is inserted. An integrated circuit board 6 is installed between the front end cover 4 and the end face of the stator 1 . A front insulating frame 7a is arranged between the stator 1 and the integrated circuit board 6, a rear insulating frame 7b is arranged between the stator 1 and the rear end cover 5, and the side of the rear end cover 5 facing away from the stator 1 is fixedly mounted on the rotating shaft 3. The exhaust assembly 8.

The side wall of the front end cover 4 is provided with six air inlet holes 41, and the air inlets include an air inlet gap 411 and a heat dissipation gap 412 respectively located on both sides of the integrated circuit board 6, wherein the air inlet gap 411 is located on the integrated circuit board 6 facing the stator 1 On one side, the air for cooling rushes into the wind gap 411 and flows into the stator 1 . The ventilation gap is located on the side of the integrated circuit board 6 facing away from the stator 1, so as to dissipate heat from the integrated circuit. The center of the inner end surface of the front end cover 4 has a concavely formed first slot 42 for arranging a bearing sleeved on the rotating shaft 3 .

As shown in Fig. 3, the front insulating frame 7a includes a frame plate 71, the frame plate 71 abuts against the end surface of the stator 1, and the frame plate 71 has a plurality of insert rings 72 on the side facing the stator 1, and the insert rings 72 are along the frame. The axial extension of the disk 71 is used for plugging and fitting with the stator 1, so that the front insulating frame 7a and the stator 1 remain relatively stationary, and the frame disk 71 is located at the corresponding position of each blade ring 72 to open a hole communicating with the heat dissipation gap 412 Vent 74. The side of the rack plate 71 facing the integrated circuit board 6 has a top ring 73 that abuts against the integrated circuit board 6, and the top ring 73 is composed of a plurality of top plates 731 that are misplaced in the circumferential direction, and an air passage 75 is left between adjacent top plates 731 , increasing the gap between the integrated circuit board 6 and the front insulating frame 7a to facilitate heat dissipation. The rear insulating frame 7b is the same as the front insulating frame 7a, and has an insert ring 72 that fits with the stator 1 and a top ring 73 that abuts against the inner end surface of the rear end cover 5 .

The inner surface of the stator 1 is surrounded by a plurality of bobbins 11. The bobbins 11 are arranged parallel to the axial direction of the stator 1 for winding coils. There is a ventilation gap 12 between two adjacent bobbins 11. The ventilation gap 12 is arranged parallel to the axial direction of the stator 1, and inserts the insert ring 72, so that the ventilation gap 12 communicates with the ventilation openings 74 in the front insulating frame 7a and the rear insulating frame 7b.

The center of the end face of the rear end cover 5 has a storage seat, and there is a second slot 52 for the rotating shaft 3 in the storage seat, and the end surface of the rear end cover 5 is provided with six air outlet holes 51 on the periphery of the storage seat. And because of the top ring 73 in the rear insulating frame 7b, the air outlet hole 51 communicates with the air vent 74 in the rear insulating frame 7b.

As shown in FIG. 4 , the exhaust assembly 8 includes an exhaust fan 81, which is fixedly installed on the rotating shaft 3, so that the exhaust fan 81 rotates with the rotating shaft 3, and the side of the exhaust fan 81 facing away from the rear end cover 5 is bonded with a The wind deflector 82 , the wind deflector 82 is coaxial with the exhaust fan 81 and covers the end of the fan blade of the exhaust fan 81 , and the center of the wind deflector 82 is provided with an air exhaust port 821 .

When using the utility model, start the motor to make the rotating shaft 3 drive the exhaust fan 81 to rotate, so that the exhaust assembly 8 generates a low pressure state toward the side of the rear end cover 5, and then drives the low-temperature air outside the motor front end cover 4 to enter the inside of the motor from the heat dissipation gap 412 , through the vent 74 of the front insulating frame 7a, the ventilation gap 12 of the stator 1, the vent 74 of the rear insulating frame 7b and the air outlet 51 of the rear end cover 5, and finally the hot air in the motor is drawn from the exhaust assembly 8 The air exhaust port 821 is discharged. Due to the setting of the air exhaust port 821, the hot air is transported in a direction away from the motor, which prevents the hot air from entering the motor again and improves the heat dissipation effect of the motor.

This specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model. After reading this description, those skilled in the art can make modifications to the embodiment without creative contribution according to needs, but as long as it is within the utility model All new claims are protected by patent law.

Claims (8)

1. An easy-to-dissipate sensory brushless motor, comprising an outer stator (1) assembly, a rotating shaft (3) and a front end cover (4) and a rear end cover (5) for the rotating shaft (3) to pass through, the outer The stator (1) assembly includes a stator (1), which is characterized in that: the front end cover (4) and the rear end cover (5) are connected through fasteners (9) and are fixedly sleeved at both ends of the stator (1), The front end cover (4) and the rear end cover (5) are respectively provided with an air inlet hole (41) and an air outlet hole (51), which are located on the side of the rear end cover (5) facing away from the front end cover (4). An exhaust assembly (8) is installed on the rotating shaft (3); the exhaust assembly (8) includes an exhaust fan (81) mounted on the rotating shaft (3) and an air guide cover covering the fan blades in the exhaust fan (81) (82), the center of the wind guide cover (82) is provided with an air outlet (821). 2. An easy-to-dissipate sensory brushless motor according to claim 1, characterized in that: an integrated circuit board (6) is arranged between the front end cover (4) and the end face of the stator (1), so that The air inlet hole (41) includes an air inlet gap (411) between the end face of the stator (1) and the integrated circuit board (6) and a heat dissipation gap ( 412). 3. An easy-to-dissipate sensory brushless motor according to claim 2, characterized in that: the outer stator (1) assembly includes a coil group wound on the stator (1), and the stator (1) ) has a winding frame (11) arranged axially along the stator (1) for winding each coil in the coil group, and there is an air intake gap (411) between two adjacent winding frames (11) The ventilation gap (12) communicated with the air outlet (51). 4. An easy-to-dissipate sensory brushless motor according to claim 3, characterized in that: the stator (1) is respectively provided with correspondingly between the integrated circuit board (6) and the rear end cover (5) The front insulating frame (7a) and the rear insulating frame (7b), the front insulating frame (7a) and the rear insulating frame (7b) all include a frame plate (71) and are arranged on one side of the frame plate (71) to abut and integrate The top ring (73) of the end face of the circuit board (6)/rear end cover (5). 5. An easy-to-dissipate sensory brushless motor according to claim 4, characterized in that: the top ring (73) is mainly composed of a plurality of misplaced top plates (731), and the top plate (731 ) leave an air passage (75), and the rack (71) has an air vent (74) communicating with the air gap (12). 6. An easy-to-dissipate sensory brushless motor according to claim 4, characterized in that: the side of the frame (71) facing away from the top ring (73) is located at the vent (74) along the shaft There is an insert ring (72) inserted in the ventilation gap (12) extending to the direction. 7. An easy-to-dissipate sensory brushless motor according to claim 1, characterized in that: the surface of the stator (1) is provided with a relief slot (13) for the fastener (9) to be inserted into. 8. An easy-to-dissipate sensory brushless motor according to claim 7, characterized in that: the centers of the front end cover (4) and the rear end cover (5) respectively have bearings for the rotating shaft (3) The first socket (42) and the second socket (52).