WO2022087777A1

WO2022087777A1 - Position-limiting member for dual clutch, dual clutch, method for pre-assembly thereof, and transmission assembly method

Info

Publication number: WO2022087777A1
Application number: PCT/CN2020/123623
Authority: WO
Inventors: 郑飞翔
Original assignee: 舍弗勒技术股份两合公司; 郑飞翔
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2022-05-05
Also published as: CN116171355A; DE112020007734T5

Abstract

Provided is a position-limiting member for a dual clutch, comprising a cylindrical body part (41) and a plurality of first engaging parts; the first engaging part is arranged in the part of the body part (41) used for opposing the inner hubs (11, 21) of the two clutch packs (1, 2) of the dual clutch, and can be matingly engaged with the second engaging part of the inner hubs (11, 21); thus the inner hubs of the two clutch packs (1, 2) are fixed in a coaxial manner with respect to the position-limiting members (4) at least in the circumferential and radial direction (R) of the dual clutch. Also provided are a dual clutch comprising the position-limiting member and method for pre-assembly thereof, and a method for assembling a transmission comprising said dual clutch. The use of the position-limiting member prevents misalignment of the splines of the two inner hubs in a dual clutch in a pre-assembled condition and the inner hub not having the same axis as a connecting sleeve, thus the problem of such unfavorable conditions causing the dual clutch not to fit smoothly on the shaft of a transmission is eliminated, and the process of installation of the dual clutch is made easy.

Description

Limiter for dual clutch, dual clutch and pre-assembly method thereof, and transmission assembly method

technical field

The present invention relates to the field of clutches for vehicles, in particular to a limiter for a double clutch, a double clutch including the limiter, a pre-assembly method thereof, and a method for assembling a transmission including the double clutch.

Background technique

A dual clutch includes two clutch assemblies and centering slave cylinders. Specifically, each clutch assembly includes an inner hub for fixed mounting to a shaft of the transmission (eg, an input shaft), an outer hub radially outside the inner hub, and a clutch unit between the inner hub and the outer hub. The inner hub is formed with splines for rotationally fixed coupling with the shaft of the transmission. The clutch unit includes friction discs and pressure plates alternately arranged in the axial direction of the clutch assembly, one of the friction discs and the pressure plate is mounted on the inner hub in a rotationally fixed (ie, non-rotatable) manner, and the other is rotationally fixed on the inner hub. outer hub. The centering slave cylinder includes a housing and a piston, bearing and preload spring mounted on the housing. In the state where the dual clutch is installed on the shaft of the transmission, the centering slave cylinder is installed between the two clutch components in the axial direction of the dual clutch, and the preload spring is applied to the two clutch components on both sides via the piston and the bearing. Preload spring force.

However, before the dual clutch is not installed on the shaft of the transmission, the relative rotation of the two inner hubs may occur so that the splines of the two inner hubs may be misaligned. This will hinder the smooth installation of the dual clutch on the transmission shaft.

SUMMARY OF THE INVENTION

The present invention has been made in view of the above-mentioned problems of the prior art. An object of the present invention is to provide a limiter for a dual clutch, a dual clutch including the limiter and a pre-assembly method thereof, the limiter can avoid the presence of two clutch assemblies in the dual clutch in a pre-assembled state The splines of the inner hub are misaligned and the inner hub and the connecting sleeve are not coaxial. Another object of the present invention is to provide a method for assembling a transmission including the above-mentioned dual clutch. The assembling method utilizes a limiter to avoid the spline dislocation of the inner hubs of the two clutch assemblies in the dual clutch in the pre-assembled state, and The fact that the inner hub is not coaxial with the connecting sleeve eliminates the problem that these unfavorable conditions prevent the dual clutch from being smoothly mounted on the transmission shaft.

In order to achieve the above purpose of the invention, the present invention adopts the following technical solutions.

The present invention provides a limiter for a dual clutch as follows, the limiter includes:

a body portion formed in a cylindrical shape; and

A plurality of first engagement portions are provided at a portion of the body portion for being opposed to the inner hubs of the two clutch assemblies of the dual clutch, and are capable of engaging with the first engagement portions of the inner hub. The two engaging parts are matched and engaged, so that the inner hubs of the two clutch assemblies are relatively fixed with the limiting member in a coaxial manner at least in the circumferential direction and the radial direction of the dual clutch.

Preferably, on either side of the body portion in the axial direction, the first engaging portions are provided axially extending and uniformly distributed along the circumference of the body portion.

More preferably, the first engaging portion is a protruding portion protruding from an axial end face of the main body portion, and at least two protruding portions are provided on either axial side of the main body portion; and/or

The first engaging portion is a recessed portion recessed from an axial end face of the body portion, and at least two recessed portions are provided on either side of the body portion in the axial direction.

More preferably, the outer peripheral surface of each protruding portion or the concave portion is flush with the outer peripheral surface of the main body portion and/or the inner peripheral surface of each protruding portion or the concave portion is flush with the main body The inner peripheral surface of the part is flush.

More preferably, the body portion is formed with a plurality of oil holes penetrating in the radial direction.

The present invention also provides a following dual clutch, which includes:

two clutch assemblies, each of which includes an inner hub, an outer hub, and a clutch unit between the inner hub and the outer hub;

a centering slave cylinder mounted between the two clutch assemblies in the axial direction of the dual clutch and used to control engagement or disengagement of the clutch unit; and

In the limiting member for dual clutches according to any one of the above technical solutions, the limiting member is interposed between the inner hubs of the two clutch assemblies in the axial direction and can be detachably mounted on the inner hub of the two clutch assemblies. The inner hub can make the inner hub of the two clutch assemblies and the limiting member relatively fixed at least in the circumferential direction and the radial direction of the dual clutch.

Preferably, an axial end face of the inner hub opposite to the stopper is formed with a second engagement portion matching the first engagement portion of the stopper, and the second engagement portion is formed to extend from the shaft A concave portion concave to the end face or a convex portion protruding from the axial end face.

More preferably, the inner hub includes an inner sleeve, an outer sleeve located radially outside the inner sleeve, and a connecting portion for connecting the inner sleeve and the outer sleeve, the inner sleeve The barrel is formed with splines for torsionally engaging with the shaft of the transmission, and the second engagement portion is formed in the inner sleeve.

More preferably, the centering slave cylinder is located on the radially outer side of the limiting member, and the centering slave cylinder is formed with an oil guide surface opposite to the oil hole of the limiting member.

The present invention also provides a pre-assembly method of the dual clutch according to any one of the above technical solutions, the pre-assembly method comprising:

The centering slave cylinder and the limiter for the dual clutch are installed between the two clutch assemblies, and the first engagement portion of the limiter for the dual clutch is connected to the two clutch assemblies The second engaging parts of the inner hub are engaged together, and the limiter for the dual clutch, the centering slave cylinder and the two clutch assemblies form a pre-assembled dual clutch in a coaxial manner. In the assembled dual clutch, the limiting member for the dual clutch is relatively fixed with the inner hubs of the two clutch assemblies and the splines of the inner hubs of the two clutch assemblies are aligned.

Preferably, the pre-assembly method further includes:

A plurality of fasteners are mounted to the outer hubs of the two clutch assemblies such that the outer hubs of the two clutch assemblies are relatively fixed in position at least axially and circumferentially.

More preferably, the fixing member includes a main body portion and a plurality of fixing posts extending from the main body portion, and the fixing posts of the same fixing member respectively protrude into the holes of the outer hubs of the two clutch assemblies .

The present invention also provides a method for assembling a transmission including the dual clutch described in any one of the above technical solutions, the assembling method comprising:

The centering slave cylinder and the limiter for the dual clutch are installed between the two clutch assemblies, and the first engagement portion of the limiter for the dual clutch is connected to the two clutch assemblies The second engaging parts of the inner hub are engaged together, and the limiter for the dual clutch, the centering slave cylinder and the two clutch assemblies form a pre-assembled dual clutch in a coaxial manner. In the assembled dual clutch, the limiting member for the dual clutch is relatively fixed with the inner hubs of the two clutch assemblies and the splines of the inner hubs of the two clutch assemblies are aligned; and

The transmission including the pre-assembled dual clutch is mounted to the shaft of the transmission so that the inner hubs of the two clutch assemblies and the stopper are fitted over the shaft.

Preferably, the pre-assembled dual clutch is a dual clutch pre-assembled using the pre-assembly method described in any one of the above technical solutions.

More preferably, the assembling method also includes:

After installing the pre-assembled dual clutch to the transmission shaft, the mount is removed from the outer hubs of the two clutch assemblies.

By adopting the above technical solutions, the present invention provides a limiter for a double clutch, a double clutch including the limiter, and a pre-assembly method thereof. In the dual clutch, the tubular stopper can make the inner hub of the dual clutch fixed relative to the stopper at least in the radial and circumferential directions of the dual clutch, thereby avoiding the occurrence of the dual clutch in the pre-assembled state. The splines of the inner hubs of the two clutch assemblies are misaligned and the inner hub and the connecting sleeve are not coaxial. In this way, in the assembling method of the transmission including the above-mentioned dual clutch, the use of the limiter avoids the spline misalignment of the inner hubs of the two clutch assemblies in the dual clutch in the pre-assembled state and the non-axis between the inner hub and the connecting sleeve. Therefore, the problem that the dual clutch cannot be smoothly installed on the shaft of the transmission due to these unfavorable conditions is eliminated, and the installation process of the dual clutch is easy.

Description of drawings

FIG. 1 is a schematic cross-sectional view illustrating a dual clutch according to an embodiment of the present invention in a pre-assembled state.

Fig. 2a is a schematic perspective structure diagram showing the first inner hub of the dual clutch in Fig. 1; Fig. 2b is a perspective structure diagram showing the second inner hub of the dual clutch in Fig. 1; FIG. 1 is a schematic three-dimensional structural diagram of the limiting member of the dual clutch; FIG. 2d is a three-dimensional structural schematic diagram showing the fixing member of the dual clutch in FIG. 1 .

Description of reference numerals

1 first clutch assembly 11 first inner hub 111 first inner sleeve 111c first recessed portion 112 first outer sleeve 113 first connecting portion 12 first outer hub 13 first clutch unit

2 The second clutch assembly 21 The second inner hub 211 The second inner sleeve 211c The second recess 212 The second outer sleeve 213 The second connecting part 22 The second outer hub 23 The second clutch unit

3 pairs of Chinese slave cylinder 31 Housing 31s Oil guide surface 32 Piston 33 Bearing 34 Preload spring

4 Stopper 41 Main body 41h Oil hole 42 Protrusion

5. The fixing member 51 the main body portion 52 the fixing post 53 the holding portion.

A Axial R Radial.

Detailed ways

Exemplary embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present invention, and are not used to exhaust all possible ways of the present invention, nor to limit the scope of the present invention.

In the present invention, unless otherwise specified, "axial", "radial" and "circumferential" respectively refer to the axial, radial and circumferential directions of the dual clutch according to the present invention; "one axial direction" refers to the left side in FIG. 1 , and “the other side in the axial direction” refers to the right side in FIG. 1 . In addition, "pre-assembled" or "pre-assembled state" refers to a state in which the components of the dual clutch according to the present invention have been assembled with each other and can be integrally assembled to the shaft of the transmission.

(Structure of a dual clutch according to an embodiment of the present invention)

As shown in FIG. 1 , the dual clutch according to the present invention includes two clutch assemblies (a first clutch assembly 1 and a second clutch assembly 2 ), a centering slave cylinder 3 , a limiting member 4 and a plurality of fixing members 5 .

Specifically, in the present embodiment, the first clutch assembly 1 is located on one axial side (the left side in FIG. 1 ) of the centering slave cylinder 3 , and includes a first inner hub 11 , a first outer hub 11 and a first outer hub 11 assembled together. The hub 12 and the first clutch unit 13 located between the first inner hub 11 and the first outer hub 12 .

As shown in FIG. 2 a , the first inner hub 11 includes a first inner sleeve 111 , a first outer sleeve 112 and a first connection between the first inner sleeve 111 and the first outer sleeve 112 , which are integrally formed Section 113. Both the first inner sleeve 111 and the second outer sleeve 212 are formed in a cylindrical shape and the first outer sleeve 112 is located radially outside the first inner sleeve 111 . The first connection part 113 is formed in a ring shape and is used to connect the first inner sleeve 111 and the first outer sleeve 112 . The inner peripheral portion of the first inner sleeve 111 is formed with splines for rotationally fixed coupling with, for example, a shaft of a transmission. Further, in order to connect the first inner hub 11 and the limiting member 4 in a relatively fixed manner in the circumferential and radial directions R, the axial end face of the side of the first inner hub 11 facing the limiting member 4 Two first concave portions 111c are formed, and each first concave portion 111c further expands to the outer peripheral surface of the first inner hub 11 toward the radially outer side, so that the first concave portion 111c is on the outer peripheral surface of the first inner hub 11. open. The two first recesses 111c are arranged in the first inner hub 11 in a manner of being spaced apart from each other by a central angle of 180 degrees.

The first outer hub 12 half surrounds the first inner hub 11 from the radially outer side and the axial side. The outer peripheral portion of the first outer hub 12 may be formed with a plurality of lubricating oil holes for the lubricating oil to enter/exhaust the first clutch unit 13 of the first clutch assembly 1, and the plurality of lubricating oil holes are arranged along the circumferential direction of the dual clutch. In the present embodiment, part of the lubricating oil hole is used as a hole for fitting with the fixing post of the fixing member 5 .

The first clutch unit 13 includes friction discs and pressure plates, which are respectively provided at portions of the first inner hub 11 and the first outer hub 12 opposite to each other and are alternately arranged in the axial direction A. As shown in FIG. When the friction disc and the pressure plate are engaged under the force applied to the Chinese slave cylinder 3, the first clutch unit 13 is engaged; when the friction plate and the pressure plate are separated after the force applied to the Chinese slave cylinder 3 is removed, the first clutch unit 13 is engaged. Unit 13 is separated.

In the present embodiment, the second clutch assembly 2 is located on the other side (right side in FIG. 1 ) in the axial direction of the centering type slave cylinder 3 . Similar to the structure of the first clutch assembly 1 , the second clutch assembly 2 includes a second inner hub 21 , a second outer hub 22 assembled together, and a second inner hub 21 and a second outer hub 22 between the second inner hub 21 and the second outer hub 22 . clutch unit 23 .

As shown in FIG. 2b , similar to the structure of the first inner hub 11 , the second inner hub 21 includes a second inner sleeve 211 , a second outer sleeve 212 , and a second inner sleeve 211 and a second inner sleeve 212 , which are integrally formed. The second connecting portion 213 between the two outer sleeves 212 . Both the second inner sleeve 211 and the second outer sleeve 212 are formed in a cylindrical shape and the second outer sleeve 212 is located radially outside the second inner sleeve 211 . The second connection part 213 is formed in a ring shape and is used to connect the second inner sleeve 211 and the second outer sleeve 212 . The inner peripheral portion of the second inner sleeve 211 is formed with splines for rotationally fixed coupling with, for example, a shaft of a transmission. Further, in order to connect the second inner hub 21 and the limiting member 4 in a relatively fixed manner in the circumferential and radial directions R, the axial end face of the second inner hub 21 facing the limiting member 4 is formed There are two concave second concave parts 211c, and each second concave part 211c also expands to the outer peripheral surface of the second inner hub 21 toward the radially outer side, so that the second concave part 211c is open on the outer peripheral surface of the second inner hub 21 . The two second recesses 211c are arranged in the second inner hub 21 in a manner of being spaced apart from each other by a central angle of 180 degrees.

The second outer hub 22 half surrounds the second inner hub 21 from the radially outer side and the axially other side. The outer peripheral portion of the second outer hub 22 may be formed with a plurality of lubricating oil holes for the lubricating oil to enter/exhaust the clutch unit of the clutch assembly, and the plurality of lubricating oil holes are arranged along the circumferential direction of the dual clutch. In the present embodiment, part of the lubricating oil hole is used as a hole for fitting with the fixing post of the fixing member 5 .

The second clutch unit 23 includes friction discs and pressure plates, which are respectively provided at portions of the second inner hub 21 and the second outer hub 22 opposite to each other and are alternately arranged in the axial direction A. As shown in FIG. When the friction disc and the pressure plate are engaged under the force applied to the Chinese slave cylinder 3, the second clutch unit 23 is engaged; when the friction plate and the pressure plate are separated after the force applied to the Chinese slave cylinder 3 is removed, the second clutch unit 23 is engaged. Unit 23 is separated.

In the present embodiment, the centering slave cylinder 3 is located between the two

clutch assemblies

1 , 2 in the axial direction A in the dual clutch in the pre-assembled state. The centering slave cylinder 3 includes a housing 31 , a piston 32 , a bearing 33 and a preload spring 34 which are mounted on a mounting recess formed by the housing 31 . In this way, the preload spring 34 exerts a spring force via the piston 32 and the bearing 33 on the two

clutch assemblies

1 , 2 located on both sides.

In this embodiment, as shown in FIG. 2 c , the limiting member 4 includes a main body portion 41 and four protruding portions 42 that are formed as one body. The main body portion 41 is formed in a cylindrical shape, and the central through hole of the main body portion 41 is used for the shaft of the transmission to pass therethrough. The outer peripheral surface of each protruding portion 42 is flush with the outer peripheral surface of the main body portion 41 , and the two protruding portions 42 are disposed on the axial side end face of the main body portion 41 opposite to the first inner hub 11 and protrude toward the axial direction, The other two protruding portions 42 are provided on the other end face in the axial direction of the body portion 41 opposite to the second inner hub 21 and protrude toward the axial direction. On the axial end face of the main body portion 41 , the two protruding portions 42 are arranged at a center angle of 180 degrees. The positions and shapes are matched so that the two protruding portions 42 can be engaged with the first concave portion 111 c of the first inner hub 11 , so that the first inner hub 11 is in a coaxial manner with the limiting member 4 in the circumferential direction. and the radial direction R is relatively fixed; on the other end face of the body part 41 in the axial direction, the two protruding parts 42 are arranged at a center angle of 180 degrees, and the position and shape of each protruding part 42 are the same as those of the second inner The position and shape of the second recessed portion 211c of the hub 21 are matched so that the two protruding portions 42 can be matingly engaged with the second recessed portion 211c of the second inner hub 21, so that the second inner hub 21 is coaxial with the second recessed portion 211c. The manner is relatively fixed in the circumferential direction and the radial direction R with the limiting member 4 . Through the above-mentioned relative fixing between the limiting member 4 and the first inner hub 11 and the second inner hub 21, the splines of the first inner hub 11 and the splines of the second inner hub 21 can also be aligned, thereby facilitating the The splines of the first inner hub 11 and the second inner hub 21 are mounted to the portion of the shaft of the transmission where the corresponding splines are formed.

In addition, the central portion of the body portion 41 in the axial direction A is formed with two oil holes 41h penetrating in the radial direction R so that lubricating oil from the shaft of the transmission can pass through the two oil holes 41h. Further, the lubricating oil passing through the oil hole 41h reaches the oil guide surface 31s of the casing 31 of the centering slave cylinder 3 under the action of centrifugal force, and the oil guide surface 31s is transferred from the casing 31 of the centering slave cylinder 3 to the oil guide surface 31s. Opposite portions of the oil holes 41h extend toward both sides in the axial direction and extend obliquely toward the radially outer side, so that the lubricating oil can be guided to the first clutch unit 13 and the second clutch unit 23 through the oil guide surface 31s, respectively.

In this embodiment, the plurality of fixing members 5 are evenly distributed in the circumferential direction. As shown in FIG. 2d , each fixing member 5 includes a main body portion 51 and a plurality of fixing posts 52 . The main body portion 51 is also formed with a holding portion 53 in the form of a hole to facilitate holding the fixing member 5 when the fixing member 5 is installed and removed. The two rows of fixing posts 52 are fixed to the main body portion 51 and inserted into the holes of the

outer hubs

12 and 22 of the two

clutch assemblies

1 and 2 respectively, and the main body portion 51 of each fixing member 5 is in close contact with the outer contour of the corresponding part of the dual clutch, so that The plurality of fixing members 5 are detachably mounted on the two

clutch assemblies

1 and 2 of the dual clutch, so that the two

clutch assemblies

1 and 2 of the dual clutch and the pair located between the two

clutch assemblies

1 and 2 can be connected. The Chinese-type slave cylinder 3 is relatively fixed in the axial direction A and the circumferential direction of the dual clutch. When the fixing member 5 fixes the

outer hubs

12 and 22 of the two

clutch assemblies

1 and 2 relative to each other in the axial direction, it enables the two

clutch assemblies

1 and 2 to respectively apply the preload spring 34 in the center-type slave cylinder 3 Corresponding axial preload force, so that the two

clutch assemblies

1, 2 and the centering slave cylinder 3 can be installed together with a certain axial force preload, so that the preload double The axial dimension of the clutch is fixed, which facilitates subsequent installation, calibration and matching of the preloaded double clutch in the gearbox. The fixing member 5 cooperates with the limiting member 4 to reliably maintain the dual clutch in the pre-assembled state.

(The pre-assembly method of the dual clutch according to one embodiment of the present invention and the assembly method of the transmission according to the present invention including the dual clutch)

The present invention also provides a method for pre-assembling a dual clutch and a method for assembling a transmission including the above-mentioned dual clutch according to an embodiment of the present invention. The pre-assembling method includes the following steps.

The center-type slave cylinder 3 and the double clutch limiter 4 are installed between the two

clutch assemblies

1 and 2, and the protruding part 42 of the double clutch limiter 4 is connected with the two

clutch assemblies

1 and 2. The

recesses

111c, 211c of the

inner hubs

11, 12 are engaged together to form a pre-assembled dual clutch assembly in such a way that the dual clutch limiter 4, the centering slave cylinder 3 and the

inner hubs

11, 12 are coaxial , in the pre-assembled dual clutch, the limiter 4 for the dual clutch is relatively fixed with the

inner hubs

11 and 21 of the two

clutch assemblies

1 and 2 and the

inner hubs

11 and 21 of the two

clutch assemblies

1 and 2 are relatively fixed. Spline alignment. Further, the plurality of fixing members 5 are installed to the

outer hubs

12 and 22 of the two

clutch assemblies

1 and 2, so that the positions of the

outer hubs

12 and 22 of the two

clutch assemblies

1 and 2 in the axial direction A and the circumferential direction are relatively fixed, Thus, the entire dual clutch is reliably maintained in a pre-assembled state.

After the dual clutch in the pre-assembled state is obtained based on the pre-assembly method of the dual-clutch, the assembling method of the transmission according to the present invention including the dual clutch further includes the following steps: the transmission including the dual-clutch in the pre-assembled state is The mechanism is mounted on the shaft of the transmission so that the

inner hubs

11 , 21 of the two

clutch assemblies

1 , 2 and the limiter 4 are fitted over the shaft of the transmission. At this time, the splines of the

inner hubs

11 , 21 mesh with the corresponding splines of the transmission shaft, so that the

inner hubs

11 , 21 are coupled with the transmission shaft in a rotationally fixed manner.

In this way, by using the above-mentioned assembling method, the difficulty of assembling the dual clutch to the shaft of the transmission caused by the problems described in the background art can be avoided, so that the assembly is convenient and easy.

It should be understood that the above-mentioned embodiments are only exemplary, and are not intended to limit the present invention. Those skilled in the art can make various modifications and changes to the above-described embodiments under the teachings of the present invention without departing from the scope of the present invention. In addition, the following supplementary explanation is made.

(i) Although it was explained in the above specific embodiment that the stopper 4 forms the protruding portion 42 (as the first engaging portion of the stopper) and the two

inner hubs

11 , 21 form the

concave portions

111 c , 211 c (as the inner the second engagement portion of the hub), but the present invention is not limited thereto. For example, an alternative solution may also be adopted in which the stopper 4 forms a concave portion as the first engaging portion and the two

inner hubs

11, 21 may form a protruding portion as the second engaging portion.

In addition, examples of the above-mentioned protruding parts 42 include, but are not limited to, posts, hooks, blocks, bars, etc., and the above-mentioned

concave parts

111c, 211c can be formed into any desired shape.

Moreover, the numbers of the protruding parts 42 and the recessed

parts

111c and 211c are not limited to those described in the above-mentioned specific embodiments, but any number of the protruding parts 42 and the recessed

parts

111c and 211c can be provided as required.

Preferably, on either side of the body portion 41 in the axial direction, the protruding portions 42 or the

concave portions

111 c and 211 c are evenly distributed along the circumferential direction of the body portion 41 .

It should be understood that the

concave portions

111c and 211c in the present application are not limited to opening on the outer peripheral surfaces of the

inner sleeves

111 and 211, but may be open on the inner peripheral surfaces of the

inner sleeves

111 and 211. In this case, the protruding portions 42 may be open. It is formed on the inner peripheral portion of the main body portion 41 .

In addition, the recessed

parts

111c and 211c may also be represented as recessed parts (ie, blind holes) recessed inward from the axial end faces of the

inner sleeves

111 and 211 . The outer and inner peripheries are not open. The protruding portion 42 may be formed at a radially central position of the body portion 41 .

(ii) Although it is not clearly described in the above specific embodiment, it can be understood that after the pre-assembled dual clutch is successfully installed on the shaft of the transmission, the limiter 4 is fitted on the shaft to provide the two

clutch assemblies

1, 2 The

inner hubs

11, 21 are axially limited, but the fixing member 5 can be disassembled at the final stage of the assembly method of the transmission, so that the disassembled fixing member 5 can be reused for the same type of double clutch.

Claims

A limiter for a dual clutch, the limiter (4) comprising:

a body portion (41) formed in a cylindrical shape; and

A plurality of first engagement portions provided on the inner hubs (11, 21) of the body portion (41) for connecting with the two clutch assemblies (1, 2) of the dual clutch The opposite part, and can be matched with the second engaging part of the inner hub (11, 21), so that the inner hub of the two clutch assemblies (1, 2) is coaxial with the limit The piece (4) is relatively fixed at least in the circumferential and radial directions (R) of the double clutch.
The limiter for a dual clutch according to claim 1, characterized in that, on either side of the main body part (41) in the axial direction, the first engaging part is axially extended and provided along the main body The circumferential direction of the part (41) is evenly distributed.
The limiter for dual clutches according to claim 1 or 2, characterized in that:

The first engaging portion is a protruding portion (42) protruding from the axial end face of the main body portion (41), and at least two protruding portions are provided on either axial side of the main body portion (41). Section (42); and/or

The first engaging portion is a concave portion recessed from an axial end face of the body portion (41), and at least two concave portions are provided on either side of the body portion (41) in the axial direction.
The limiter (4) for a dual clutch according to claim 3, characterized in that the outer peripheral surface of each of the protruding portions (42) or the recessed portions is flat with the outer peripheral surface of the main body portion (41). and/or the inner peripheral surface of each protruding portion (42) or the concave portion is flush with the inner peripheral surface of the body portion (41).
The limiter for a dual clutch according to any one of claims 1 to 4, wherein the body portion (41) is formed with a plurality of oil holes (41h) penetrating in the radial direction (R) ).
A dual clutch comprising:

Two clutch assemblies (1, 2), each of the clutch assemblies (1, 2) respectively comprises an inner hub (11, 21), an outer hub (12, 22), and the inner hub (11, 21) and the the clutch units (13, 23) between the outer hubs (12, 22);

A centering slave cylinder (3), which is mounted between the two clutch assemblies (1, 2) in the axial direction (A) of the dual clutch and is used to control engagement or disengagement of the clutch units (13, 23); and

The limiter (4) for a dual clutch according to any one of claims 1 to 5, wherein the limiter (4) is interposed between the two clutch assemblies (1, 4) in the axial direction (A) 2) between the inner hubs (11, 21) and can be detachably mounted on the inner hubs (11, 21), so that the inner hubs (11, 21 of the two clutch assemblies (1, 2) can be ) and the limiting member (4) are relatively fixed at least in the circumferential and radial directions (R) of the dual clutch.
The dual clutch according to claim 6, characterized in that, an axial end surface of the inner hub (11, 21) opposite to the limiter (4) is formed with a surface opposite to the limiter (4). The first engaging portion matches the second engaging portion formed as a recessed portion (111c, 211c) recessed from the axial end face or a convex portion protruding from the axial end face.
The dual clutch according to claim 6 or 7, characterized in that, the inner hub (11, 21) comprises an inner sleeve (111, 211), and is located radially outside the inner sleeve (111, 211) the outer sleeve (112, 212) and the connecting part (113, 213) for connecting the inner sleeve (111, 211) and the outer sleeve (112, 212) , 211 ) are formed with splines for torsionally engaging with the shaft of the transmission, and the second engaging portion is formed on the inner sleeve ( 111 , 211 ).
The dual clutch according to any one of claims 6 to 8, characterized in that the centering slave cylinder (3) is located on the radially outer side of the limiter (4), and the centering slave The movable cylinder (3) is formed with an oil guide surface (31s) opposite to the oil hole (4h) of the stopper (4).
A pre-assembly method of the dual clutch according to any one of claims 6 to 9, the pre-assembly method comprising:

The centering slave cylinder (3) and the limiter (4) for dual clutches are installed between the two clutch assemblies (1, 2), and the limiter for dual clutches ( 4) The first engaging portion is engaged with the second engaging portion of the inner hubs (11, 21) of the two clutch assemblies (1, 2), and the limiter (4) for the dual clutch, the The centering slave cylinder (3) and the two clutch assemblies (1, 2) form a pre-assembled dual clutch in a coaxial manner. 4) Relatively fixed with the inner hubs (11, 21) of the two clutch assemblies (1, 2) and aligned with the splines of the inner hubs (11, 21) of the two clutch assemblies (1, 2).
The pre-assembly method according to claim 10, wherein the pre-assembly method further comprises:

A plurality of fixing pieces (5) are mounted to the outer hubs (12, 22) of the two clutch assemblies (1, 2) so that the outer hubs (12, 22) of the two clutch assemblies (1, 2) The position is relatively fixed at least in the axial and circumferential directions.
The pre-assembly method according to claim 11, wherein the fixing member (5) comprises a main body part (51) and a plurality of fixing posts (52) extending from the main body part (51), the same one The fixing posts (52) of the fixing member (5) respectively protrude into the holes of the outer hubs (12, 22) of the two clutch assemblies (1, 2).
A method of assembling a transmission comprising the dual clutch according to any one of claims 6 to 9, the assembling method comprising:

The centering slave cylinder (3) and the limiter (4) for dual clutches are installed between the two clutch assemblies (1, 2), and the limiter for dual clutches ( 4) The first engaging portion is engaged with the second engaging portion of the inner hubs (11, 21) of the two clutch assemblies (1, 2), and the limiter (4) for the dual clutch, the The centering slave cylinder (3) and the two clutch assemblies (1, 2) form a pre-assembled dual clutch in a coaxial manner. 4) being relatively fixed with the inner hubs (11, 21) of the two clutch assemblies (1, 2) and aligned with the splines of the inner hubs (11, 21) of the two clutch assemblies (1, 2); and

Mounting the transmission mechanism including the pre-assembled dual clutch to the shaft of the transmission so that the inner hubs (11, 21) of the two clutch assemblies (1, 2) and the stopper (4) are sleeved on the shaft .
The assembling method according to claim 13, wherein the pre-assembled dual clutch is a dual clutch pre-assembled using the pre-assembling method according to any one of claims 10 to 12.
The assembling method according to claim 14, wherein the assembling method further comprises:

After mounting the pre-assembled dual clutch to the shaft of the transmission, the mount (5) is removed from the outer hubs (12, 22) of the two clutch assemblies (1, 2).