WO2019178786A1

WO2019178786A1 - Spacer sleeve for separation sub-cylinder, spacer sleeve assembly and separation sub-cylinder

Info

Publication number: WO2019178786A1
Application number: PCT/CN2018/079902
Authority: WO
Inventors: 郑飞翔; 科特加罗·瓦勒瑞
Original assignee: 舍弗勒技术股份两合公司; 郑飞翔
Priority date: 2018-03-21
Filing date: 2018-03-21
Publication date: 2019-09-26
Also published as: CN111886419A; DE112018007304T5

Abstract

Provided is a spacer sleeve (1) for separation sub-cylinder, a threaded protrusion (12) is provided on the outer peripheral surface of a base body (10) of the spacer sleeve (1), the threaded protrusion is used for engaging with a threaded recess (20) of the inner peripheral surface of the housing (2). The spacer sleeve avoids or substantially reduces the risk of generating debris during assembly process; the spacer sleeve itself and the dimension of the housing allow for greater tolerances, therefore, the manufacturing process requirement is lower; the threaded protrusion further enhances the axial positioning of the spacer sleeve and the housing to prevent accidental detachment; and the spacer sleeve has a wide range of applications, for example, used for the centering separation sub-cylinder and external separation sub-cylinder. Provided are also a spacer sleeve assembly and a separation sub-cylinder.

Description

Separator sleeve, spacer sleeve assembly and separation sub-cylinder

Technical field

The present invention relates to a spacer sleeve, a spacer sleeve assembly and a separation sub-cylinder for separating the secondary cylinders.

Background technique

Spacer and spacer assemblies for separating secondary cylinders are known in the art. The entire spacer assembly is typically formed by pressing the spacer into the housing. This method of press-in allows for quick installation and is very economical. However, debris can be generated during the press-in process, and debris can subsequently adhere to the component, which can adversely affect subsequent applications. For example, this increases the risk of debris generation in the sealed area of the CSC (Concentric slave cylinder), the external separation sub-cylinder (SSC), which ultimately leads to an increased risk of leakage.

Summary of the invention

The present invention has been made based on the above-described deficiencies of the prior art, and an object of the present invention is to provide a spacer sleeve, a spacer sleeve assembly and a separation sub-cylinder for separating the sub-cylinders.

The spacer of the separating sub-cylinder according to the present invention has a thread-like projection on the outer peripheral surface of the base body for engaging the thread-like recess of the inner peripheral surface of the housing.

Preferably, the spacer has only one of the threaded projections.

Preferably, the spacer has a plurality of the threaded projections.

Preferably, the threaded projections are continuous or broken.

Preferably, the spacer is made of metal or plastic.

Preferably, the thread-like projections extend less than 360° on the outer circumferential surface of the base body, that is, extend less than one week.

The invention also relates to a spacer assembly comprising:

a spacer having a thread-like protrusion on an outer circumferential surface of the base body;

a housing having a threaded recess on an inner circumferential surface thereof

Wherein the threaded protrusion is engaged with the threaded recess.

Preferably, the threaded projection and the threaded recess are configured to achieve a self-locking function.

Preferably, the spacer of the spacer assembly has the features of the spacer described above.

The invention also relates to a separating sub-cylinder having the spacer assembly described above.

The spacer according to the present invention is screwed into the housing by rotation, since the prior art interference fit assembly process is not required, thereby avoiding or substantially reducing the risk of debris generation during assembly. Due to the presence of threaded projections, the spacer allows the spacer itself and the dimensions of the housing to allow for greater tolerances and therefore lower manufacturing requirements. The threaded projection further enhances the axial positioning of the spacer and the housing to prevent accidental detachment. Moreover, the spacer has a wide application range, and can be used, for example, for a center separation sub-cylinder or an external separation sub-cylinder.

DRAWINGS

Figure 1 shows a perspective view of one embodiment of a spacer in accordance with the present invention.

Figure 2 shows a perspective view of one embodiment of a housing for a spacer according to the invention.

3 shows an axial cross-sectional view of one embodiment of a spacer assembly in accordance with the present invention.

Description of the reference numerals

1 spacer; 2 housing;

10 base; 11 cap; 12 threaded protrusion;

20 threaded recesses.

detailed description

Specific embodiments of the present invention are described below with reference to the accompanying drawings.

Figure 1 shows a perspective view of an embodiment of a spacer 1 according to the invention.

In this embodiment, the spacer 1 has a base 10, a cap portion 11, and a threaded projection 12 on the outer peripheral surface of the base 10, and the threaded projection 12 is continuous. However, it is also conceivable to provide a plurality of thread-like projections 12 on the outer circumferential surface of the base body 10, and each of the thread-like projections 12 may be continuous or broken.

Figure 2 shows a perspective view of one embodiment of a housing for a spacer according to the invention. It can be seen here that the inner circumferential surface of the housing 2 has a threaded recess 20 . The housing 2 is usually made of plastic.

3 shows an axial cross-sectional view of one embodiment of a spacer assembly in accordance with the present invention. Here, the spacer 1 and the housing 2 have been assembled by the engagement of the threaded projection 12 and the threaded recess 20.

During assembly, by screwing the spacer 1 into the housing 2, the threaded projections 12 and the threaded recesses 20 of the housing 2 are threadedly engaged with each other, since the interference of the spacer 1 and the housing 2 is not required. Cooperate to avoid debris generated by friction during assembly.

Optionally, but not by way of limitation, the threaded projections 12 of the spacer 1 and the threaded recesses 20 of the housing 2 are configured to achieve a self-locking function.

Claims

A spacer for separating a sub-cylinder, characterized in that the spacer has a thread-like projection on an outer peripheral surface of a base body thereof for engaging with a thread-like recess of an inner circumferential surface of the housing.
The spacer of claim 1 wherein said spacer has only one of said threaded projections.
The spacer of claim 1 wherein said spacer has a plurality of said threaded projections.
A spacer according to any one of claims 1 to 3, wherein the threaded projections are continuous or broken.
A spacer according to any one of claims 1 to 3, wherein the spacer is made of metal or plastic.
The spacer according to any one of claims 1 to 3, wherein the thread-like projection extends less than 360° on an outer circumferential surface of the base.
A spacer assembly comprising:

a spacer having a thread-like protrusion on an outer circumferential surface of the base body;

a housing having a threaded recess on an inner circumferential surface thereof

Wherein the threaded protrusion is engaged with the threaded recess.
The spacer assembly of claim 7 wherein said threaded projection and said threaded recess are configured to achieve a self-locking function.
The spacer assembly according to claim 7 or 8, wherein the spacer is the spacer according to any one of claims 2 to 6.
A separating sub-cylinder, characterized in that the separating sub-cylinder has a spacer assembly according to any one of claims 7 to 9.