阅读说明：本技术 自调节离合器 (Self-adjusting clutch ) 是由 范意中 于 2018-06-25 设计创作，主要内容包括：提供了一种自调节离合器,其包括压盘、调节环、膜片弹簧、离合器盖、对中销钉、调节套筒和螺旋弹簧。膜片弹簧的径向外端支撑于压盘,调节环设置于离合器盖和膜片弹簧之间,对中销钉的轴向一端连接到离合器盖,调节套筒包括围绕对中销钉设置的套筒部和从套筒部朝向径向外侧延伸的支撑部,螺旋弹簧围绕对中销钉设置在套筒部内,螺旋弹簧在对中销钉的轴向另一端和套筒部之间被压缩,支撑部支撑膜片弹簧。由于螺旋弹簧的力相对于弹簧行程呈绝对线性增加的关系,因此,容易设计、计算和改变螺旋弹簧,从而可以降低自调节离合器的开发和生产成本。(A self-adjusting clutch is provided that includes a pressure plate, an adjustment ring, a diaphragm spring, a clutch cover, a centering pin, an adjustment sleeve, and a coil spring. The radial outer end of the diaphragm spring is supported on the pressure plate, the adjusting ring is arranged between the clutch cover and the diaphragm spring, one axial end of the centering pin is connected to the clutch cover, the adjusting sleeve comprises a sleeve portion arranged around the centering pin and a supporting portion extending from the sleeve portion towards the radial outer side, the spiral spring is arranged in the sleeve portion around the centering pin, the spiral spring is compressed between the other axial end of the centering pin and the sleeve portion, and the supporting portion supports the diaphragm spring. Since the force of the coil spring is in an absolutely linearly increasing relationship with respect to the spring stroke, it is easy to design, calculate and change the coil spring, so that the development and production costs of the self-adjusting clutch can be reduced.)

1. A self-adjusting clutch comprises a pressure plate, an adjusting ring, a diaphragm spring, a clutch cover, a centering pin, an adjusting sleeve and a spiral spring,

wherein a radially outer end of the diaphragm spring is supported by the pressure plate, the adjustment ring is disposed between the clutch cover and the diaphragm spring, one axial end of the centering pin is connected to the clutch cover, the adjustment sleeve includes a sleeve portion disposed around the centering pin, and a support portion extending radially outward from the sleeve portion, the coil spring is disposed around the centering pin within the sleeve portion, the coil spring is compressed between the other axial end of the centering pin and the sleeve portion, and the support portion supports the diaphragm spring.

2. The self-adjusting clutch of claim 1, wherein the centering pin includes a flange at the other axial end thereof, and a gap exists between the sleeve portion and the flange.

3. The self-adjusting clutch of claim 1, wherein the centering pin is a rivet, and an axial end of the centering pin is riveted to the clutch cover.

4. The self-adjusting clutch of claim 1, wherein the sleeve portion has a top portion, the axially opposite end of the centering pin is provided with a flange, and the coil spring is compressed between the top portion and the flange.

5. The self-adjusting clutch of claim 1, wherein the support portion contacts the diaphragm spring at a radially outer end thereof to support the diaphragm spring, and gaps are provided between radially inner ends and a radially intermediate portion of the support portion and the diaphragm spring.

6. The self-adjusting clutch of claim 1, wherein a support location at which the support portion supports the diaphragm spring in a radial direction of the self-adjusting clutch is located between the support locations at which the centering pin and the diaphragm spring are supported on the pressure plate.

7. The self-adjusting clutch as claimed in claim 1, characterized in that the support extends in partial sections in the circumferential direction of the self-adjusting clutch.

8. The self-adjusting clutch of claim 1, wherein the sleeve portion extends into the space between the separating fingers of the diaphragm spring.

9. The self-adjusting clutch of claim 1, wherein the adjustment sleeve is prevented from rotating relative to the diaphragm spring by a positive fit of the spacing between the sleeve portion and the separating fingers of the diaphragm spring.

10. The self-adjusting clutch according to claim 1, characterized in that the adjustment sleeve is prevented from rotating relative to the centering pin and the diaphragm spring by a form fit between the sleeve portion and the centering pin.

Technical Field

The invention relates to a clutch, in particular to a self-adjusting clutch.

Background

Fig. 1 shows the construction of a self-adjusting clutch known to the inventors. The self-adjusting clutch 100 comprises a pressure plate 1, a clutch cover 2, a rivet 3, an adjusting ring 4, a diaphragm spring 5, a support ring 6 and a sensor spring 7. One axial end (upper end in fig. 1) of the rivet 3 is riveted to the clutch cover 2. The radially outer end of the diaphragm spring 5 is supported on the pressure plate 1. The adjusting ring 4 is arranged between the clutch cover 2 and the diaphragm spring 5. A support ring 6, for example made of steel wire, is arranged on the side of the diaphragm spring 5 opposite to the side on which the adjusting ring 4 is located. The radially outer end of the sensor spring 7 is supported by the support ring 6 on the opposite side of the support ring 6 from the diaphragm spring 5, and the radially inner end of the sensor spring 7 is supported by the other axial end (lower end in fig. 1) of the rivet 3.

The sensor spring 7 is mainly used to provide a part of the total sensor load balancing the separate load applied to the diaphragm spring 5. The rivet 3 serves as a support for the sensor spring 7.

The sensor spring 7 is a disc spring. On the one hand, the structure of the disk spring 7 is relatively complex, so that the development and production costs are high. On the other hand, it is also complicated to accurately calculate the load and stress of the sensor spring 7 by a finite element analysis method, and when a new sensor spring is developed, the design development period and cost are increased.

Disclosure of Invention

The present invention has been made in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide a self-adjusting clutch that can reduce development and production costs.

A self-adjusting clutch is provided, comprising a pressure plate, an adjusting ring, a diaphragm spring, a clutch cover, a centering pin, an adjusting sleeve and a coil spring,

wherein a radially outer end of the diaphragm spring is supported by the pressure plate, the adjustment ring is disposed between the clutch cover and the diaphragm spring, one axial end of the centering pin is connected to the clutch cover, the adjustment sleeve includes a sleeve portion disposed around the centering pin, and a support portion extending radially outward from the sleeve portion, the coil spring is disposed around the centering pin within the sleeve portion, the coil spring is compressed between the other axial end of the centering pin and the sleeve portion, and the support portion supports the diaphragm spring.

In at least one embodiment, the centering pin includes a flange at the other axial end thereof, and a gap exists between the sleeve portion and the flange.

In at least one embodiment, the centering pin is a rivet, and one axial end of the centering pin is riveted to the clutch cover.

In at least one embodiment, the sleeve portion has a top portion, the axially other end of the centering pin is provided with a flange, and the coil spring is compressed between the top portion and the flange.

In at least one embodiment, the support portion is in contact with the diaphragm spring at a radially outer end thereof to support the diaphragm spring, and gaps are provided between the radially inner end and a radially intermediate portion of the support portion and the diaphragm spring.

In at least one embodiment, the support portion supports the diaphragm spring in a support position located between the centering pin and a support position in which the diaphragm spring is supported on the pressure plate in a radial direction of the self-adjusting clutch.

In at least one embodiment, the support extends in partial sections in the circumferential direction of the self-adjusting clutch.

In at least one embodiment, the sleeve portion extends into the space between the spaced apart fingers of the diaphragm spring.

In at least one embodiment, the adjustment sleeve is prevented from rotating relative to the diaphragm spring by a form fit of the spacing between the sleeve portion and the separating fingers of the diaphragm spring.

In at least one embodiment, the adjustment sleeve is prevented from rotating relative to the centering pin and the diaphragm spring by a form fit between the sleeve portion and the centering pin.

In the invention, a spiral spring is used for replacing a disc-shaped sensor spring in the prior art, and the adjusting sleeve is matched with the spiral spring to support the diaphragm spring. Since the force of the coil spring is in an absolutely linearly increasing relationship with respect to the spring stroke, it is easy to design, calculate and change the coil spring, so that the development and production costs of the self-adjusting clutch can be reduced.

Drawings

Fig. 1 shows a partial sectional view of a self-adjusting clutch known to the inventor.

Fig. 2 shows a partial sectional view of a self-adjusting clutch according to an embodiment of the invention.

Fig. 3 shows a partially enlarged view of the self-adjusting clutch from fig. 2.

Fig. 4 is a perspective view illustrating a fitting relationship of a diaphragm spring and an adjustment sleeve of the self-adjusting clutch of fig. 2.

Description of the reference numerals

100 self-adjusting clutch; 1, pressing a plate; 2 a clutch cover; 3, riveting; 4 adjusting a ring; 5 a diaphragm spring; 6, supporting the ring; 7 a sensor spring;

200 self-adjusting clutch; 10, pressing a plate; 11 a convex ring of a pressure plate; 20 a clutch cover; 30, rivets; 31 an axial end of the rivet; 32 the flange of the rivet; 40 adjusting the ring; 50 diaphragm springs; 51 intervals; 70 a coil spring; 80 adjusting the sleeve; 81 sleeve portions; 82 a support part; 83 the radially outer end of the support; 84 the top of the sleeve portion; 85 holes;

g gap; axial direction A; r is radial.

Detailed Description

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the detailed description is intended only to teach one skilled in the art how to practice the invention, and is not intended to be exhaustive or to limit the scope of the invention.

Referring to fig. 1 to 3, the axial direction of the clutch is indicated by a, and the radial direction of the clutch is indicated by R. The rivets 3, 30 extend in the axial direction a. The upper and lower sides in the axial direction a in fig. 1 to 3 are only for convenience of explanation and understanding of the present invention, and do not represent the actual orientation of the clutch.

As shown in fig. 2-4, one embodiment of the present invention provides a self-adjusting clutch 200. The clutch 200 includes a pressure plate 10, a clutch cover 20, a rivet 30, an adjusting ring 40, a diaphragm spring 50, a coil spring 70, and an adjusting sleeve 80. An axial end 31 of the rivet 30 as an example of the centering pin is connected, in particular riveted, to the clutch cover 20. The radially outer end of the diaphragm spring 50 is supported on the collar 11 of the pressure plate 10. The adjustment ring 40 is disposed between the clutch cover 20 and the diaphragm spring 50.

The pressure plate 10, clutch cover 20, adjustment ring 40, diaphragm spring 50 may have a similar construction to that of fig. 1 or may be suitably constructed as in the prior art, and will not be described in detail herein.

In this embodiment, the adjustment sleeve 80 includes a sleeve portion 81 and a support portion 82 extending toward the radially outer side from the other end in the axial direction of the sleeve portion 81 (the end close to the pressure plate 10, the "lower end" in fig. 2 and 3). The sleeve portion 81 has a top portion 84, and a hole 85 through which the rivet 30 passes is formed in the top portion 84. The support portion 82 supports the diaphragm spring 50 at its radially outer end 83. The radially inner end and the radially intermediate portion of the support portion 82 form a gap with the diaphragm spring 50.

The sleeve portion 81 projects into the space 51 between the separated fingers of the diaphragm spring 50. As shown in fig. 2 and 3, the upper surface of the axial section of the support portion 82 has a somewhat V-shape, so that, in the entire adjustment sleeve 80, only the radially outer end 83 of the support portion 82 supports the diaphragm spring 50. The support portion 82 supports the diaphragm spring 50 between the radially outer end of the diaphragm spring 50 (the portion of the diaphragm spring 50 that contacts the collar 11 of the pressure plate 10) and the rivet 30. The support 82 extends in a partial section in the circumferential direction of the clutch 200. In one illustration, the support 82 may have a fan shape.

The rivet 30 is formed at the other end thereof in the axial direction with a flange 32, and the coil spring 70 is fitted between the sleeve portion 81 and the rivet 30 and compressed between the top 84 of the sleeve portion 81 and the flange 32.

A gap G is formed between the bottom of the sleeve portion 81 and the flange 32. As the clutch 200 is used, the friction material (e.g., pressure plate 10) may gradually wear and the coil spring 70 may adjust the operating point of the clutch. More specifically, the contact position of the support portion 82 and the diaphragm spring 50 may be changed.

In this embodiment, the adjustment sleeve 80 may serve two functions. On the one hand, the sleeve portion 81 of the adjustment sleeve 80 supports the coil spring 70, which functions similarly to the sensor spring 7 in fig. 1, to the rivet 30, and on the other hand, the support portion 82 of the adjustment sleeve 80 may support the diaphragm spring 50, which functions similarly to the support ring 60 in fig. 1. Similarly to the structure in fig. 1, the spring force of the coil spring 70 in the present embodiment is used as a part of the total sensor load.

In the present embodiment, the disc spring 7 in fig. 1 is replaced with a coil spring 70. Since the force of the coil spring increases absolutely linearly with respect to the spring travel, it is easy to design, calculate and change the coil spring.

It should be understood that the above embodiments are only exemplary and are not intended to limit the present invention. Various modifications and alterations of the above-described embodiments may be made by those skilled in the art in light of the teachings of the present invention without departing from the scope thereof.

(1) It should be appreciated that the coil spring 70 and the adjustment sleeve 80 according to the present invention may be provided at a plurality of rivets 30 disposed around the circumference of the clutch 200.

(2) Although not described above, the adjustment sleeve 80 may be prevented from rotating relative to the rivet 30 or the diaphragm spring 50 by suitable means.

For example, in the case where the rivet 30 is non-rotatably fixed to the clutch cover 20, the adjustment sleeve 80 can be prevented from rotating relative to the rivet 30 and the diaphragm spring 50 by the form fit of the rivet 30 and the hole 85. At this time, the hole 85 may be a non-circular hole.

In addition, the sleeve portion 81 of the adjustment sleeve 80 can also be prevented from rotating relative to the diaphragm spring 50 by the form fit of the gap 51. Therefore, the sleeve portion 81 does not need to be cylindrical.

(3) The rivet 30 is merely one specific example of the centering pin in the present invention, and other members such as a bolt may be used instead of the rivet 30. As long as one axial end of the centering pin can be attached to the clutch cover 20 and the other axial end can support the coil spring 70.