WO2007126146A1

WO2007126146A1 - Structure for containing components of wet clutch pack

Info

Publication number: WO2007126146A1
Application number: PCT/JP2007/059542
Authority: WO
Inventors: Chen Yu Li; Toru Funane; Yuzuru Sambongi; Hisanao Kitabayashi; Seiji Nara
Original assignee: Dynax Corporation
Priority date: 2006-04-28
Filing date: 2007-04-27
Publication date: 2007-11-08
Also published as: JP2009168041A

Abstract

A structure for containing the components of a wet clutch pack comprises a front cover (20) joined to the engine side, and a rear cover (10) arranged on the gear box side. The front cover (20) is bent by substantially 90° at the radial end (20a) to have a cup-shape extending to the gear box side. The front cover (20) and the rear cover (10) are locked in the axial direction on the gear box side by a removable snap ring (30) through a notch (27) provided in the front cover (20).

Description

Specification

Storage structure for wet clutch pack components

Technical field

The present invention relates to a wet clutch pack used for a vehicle transmission or the like, and more particularly to a storage structure for components of a dual clutch pack.

Background art

As a conventional wet dual clutch pack structure, as shown in FIG. 12, the first and second wet multi-plate clutches K 1 and K 2 are concentrically arranged in the radial direction. (Patent Document 1) and Japanese Patent Application Laid-Open No. 2004-169917 (Patent Document 2) use a component storage structure.

Disclosure of the invention

In the wet dual clutch pack shown in Fig. 12, the outer periphery of the front cover 200 is fixed so that it does not open axially with the rear cover 100 via the snap ring 300 at the right end of the stepped cup-shaped rear force bar 100. It has been done.

Further, as disclosed in Patent Document 1, the right end portion of the rear cover 100 and the outer peripheral side of the front cover 200 have tooth shapes (not shown) having constricted portions provided radially on the outer periphery of the front cover 200. The constricted part of the rear cover 100 fits into the opening (not shown) provided in the rear cover 100 to prevent the rear cover 100 from opening outward (burst) due to centrifugal force. It has become.

The first clutch K 1 operated by the piston 102 is arranged on the radially outer side, and the second clutch K 2 operated by the piston 202 is arranged in the inner drum 201, that is, on the radially inner side.

In the wet dual clutch pack of Fig. 12, the torque transmission path is as shown in Fig. 13.

First, as shown in Fig. 13 (a), K1 torque transmission follows the path of K1 torque input → front cover 200 → rear cover 100 → first hap 104 → K1 torque output. Next, as shown in Fig. 13 (b), K 2 torque transmission is as follows: K 2 torque input → front cover 2 0 0 → rear cover 1 0 0 → inner drum 2 0 1 → second hub 2 0 4 → K 2 torque output path.

Therefore, with such a torque transmission path, the torque input from the engine side is always transmitted to the gear box side via the fitting portion between the rear cover 100 and the front cover 200. I understand that. In such a structure, the clutch that doubles as the starting clutch must be able to transmit a large torque at starting and engine rotation vibration at low speed. There is a problem that high manufacturing accuracy that leads to high costs is required.

Also, in order to receive the piston load, in addition to the front cover 200, an end plate 106 is required, and there is a problem that the number of parts increases accordingly. In view of the above problems, the present invention provides a wet clutch pack component storage structure in which K 1 torque transmission does not pass through the fitting portion between the rear cover and the front cover and the number of components is reduced. With the goal.

According to the present invention, in a wet clutch pack component storage structure comprising a front cover connected to the engine side and a rear cover arranged on the gear box side, the front cover is bent at approximately 90 degrees at the radial end. The above-mentioned problems have been solved by a component clutch storage structure for a wet clutch pack characterized by having a cup shape extending toward the gear box.

The front cover and the rear cover are fitted on the gear box side.

A structure in which a plurality of claws formed in the axial direction on the front cover are fitted into holes provided in the rear force bar, or a step formed at an end of the front cover on the gear box side. And a structure in which an annular band is mounted on an outer peripheral surface of the front cover. The front cover is prevented from opening radially outwards due to centrifugal force (burst).

In addition, the front cover and the rear cover are prevented from coming off by the front cover. Provided on the inner peripheral side of the front cover so as to hit the groove for snap ring engagement provided on the inner peripheral side and the outer peripheral side of the rear force par or the back of the external spline member provided on the rear cover It is preferable that the snap ring engaging groove is formed by a snap ring that is detachable through a notch provided in the front cover.

Furthermore, when applied to a wet dual clutch pack, the present invention is particularly suitable because the torque at the time of starting is transmitted to the output side without passing through the fitting portion between the rear cover and the front force bar.

According to the component storage structure of the wet clutch pack of the present invention, it is possible to prevent K 1 torque transmission from passing through the fitting portion between the rear cover and the front cover. In addition, the number of parts in the component storage structure of the wet clutch pack can be reduced.

Furthermore, even when the snap ring is built-in, the snap ring can be easily attached and detached when necessary for maintenance.

Brief Description of Drawings

FIG. 1 is an exploded perspective view of three main elements of a component storage structure of a wet clutch pack according to a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of three main elements of a component storage structure of a wet clutch pack according to a second embodiment of the present invention.

FIG. 3 is an exploded perspective view of three main elements and a band of a component storage structure of a wet clutch pack according to a third embodiment of the present invention.

FIG. 4 is an axial sectional view of the wet clutch pack according to the first embodiment of the present invention. FIG. 5 is an axial sectional view of a wet clutch pack according to a second embodiment of the present invention. FIG. 6 is an axial sectional view of a wet clutch pack according to a third embodiment of the present invention. (A) of FIG. 7 is an enlarged perspective view showing a state in which a snap ring is set in the groove of the rear cover of the first embodiment of the present invention, and (b) is a rear view of the second embodiment of the present invention. The enlarged perspective view which shows the state which set the snap ring on the back surface which is the gearbox side of the external spline member of a force bar. FIG. 8 is a perspective view showing a state in which the front cover is mounted on the rear force par of the first embodiment of the present invention and is about to be integrated.

FIG. 9 is an enlarged side view showing a state in which the rear cover and the front cover are loosely fitted via the snap ring. (A) is the first embodiment of the present invention, and (b) is the present invention. Second Embodiments are shown respectively.

FIG. 10 is an axial sectional view showing a torque transmission path in the case of the present invention.

K

1 Torque transmission path, (b) shows K 2 torque transmission path.

Fig. 11 shows the inner side of the front cover.

Fig. 12 is an axial sectional view of a conventional wet clutch pack.

Fig. 13 is an axial cross-sectional view showing a conventional torque transmission path, where (a) shows the K 1 卜 torque transmission path and (b) shows the K 2 torque transmission path.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the structure of the wet clutch pack to which the present invention is applied will be described using a dual clutch as a specific example.

FIG. 1 is an exploded perspective view of three main elements of a component storage structure of a wet clutch pack according to a first embodiment of the present invention. The three main elements are the rear cover 10, the front cover 20, and the snap ring 30.

Next, FIG. 4 is an axial sectional view of the wet clutch pack according to the first embodiment of the present invention. Constituent elements corresponding to the conventional structure in Fig. 12 are denoted by corresponding reference numerals and description thereof is omitted.

The greatest feature that is different from the conventional structure of FIG. 12 is that in the present invention, the front cover 20 is bent at approximately 90 degrees at the radial end 20 a so as to extend to the gear box side. The fitting part of the rear cover 10 and the front cover 20 is changed to the gear box side instead of the conventional engine side. The snap ring 30 is interposed in the fitting portion between the rear cover 10 and the front cover 20, so that the both are prevented from coming off in the axial direction. The snap ring 30 used in the present invention is a so-called “abutment” 3 2, 3 2. It is of a prepared type. The following? ~ Referring to Fig. 9, the procedure for attaching the snap ring 30 will be described.

Here, (a) of FIG. 7 is an enlarged perspective view showing a state in which the snap ring 30 is set on the rear cover 10 of the first embodiment, and FIG. 8 is a diagram of the rear force bar 10 of the first embodiment. FIG. 9 (a) is a perspective view showing a state in which the front cover 20 is put on and integrated with each other. FIG. 9 (a) shows the rear cover 10 and the front cover 20 of the second embodiment through the snap ring 30. FIG. 6 is an enlarged side view showing a state in which it is fitted tightly.

First, as shown in the enlarged perspective view of the first embodiment in FIG. 7 (a), the snap ring 30 is set in the groove 18 of the rear cover 10 with the inner surface facing up. Next, when the joints 3 2 and 3 2 of the snap ring 30 are closed by a not-shown plier (shown in FIG. 8), the snap ring 30 is completely immersed in the groove 18 and the front cover 20 and It becomes a state that can be integrated.

Therefore, as shown in the perspective view of the first embodiment in FIG. 8, in this state, a plurality of claws extending in the axial direction are formed on the front cover 20 with the front cover 20 placed thereon. Make sure that 2 5 fits into the corresponding hole 15 in the rear cover 10.

After confirming that the front cover 20 has been placed on the rear cover 10 without any gaps as described above, the joints 3 2 and 3 2 of the snap ring 30 are opened. When the joints 3 2 and 3 2 are opened in this way, the gaps between the joints 3 2 and 3 2 are slightly opened, and the snap ring 3 0 has a groove 18 in the rear cover 10 and a groove in the front cover 20. Engage with both 2 and 8 to restrain both in the axial direction. This state is shown in Fig. 9 (a).

Since the front cover 20 has a notch 2 7 (see Fig. 1), it is possible to open and close the joints 3 2 and 3 2 of the snap ring 30 from the outside. it can.

If it is necessary to separate the rear cover 10 and the front cover 20 for maintenance, etc., remove the snap ring 3 0 by reversing the above procedure. be able to. That is, when the gap between the slightly open joints 32 and 32 of the snap ring 30 is completely closed at the notch 27 of the front cover 20, the snap ring 30 is completely immersed in the groove 18 of the rear cover 10. It can be easily separated from the rear cover 10 by lifting the —20 up. In the assembly process, the plurality of axial claws 25 formed on the front cover 20 are fitted into the corresponding holes 15 in the rear cover 10, so that the front cover 20 is radially outward by centrifugal force. Opening is prevented (berth wrinkle prevention).

Next, FIG. 2 and FIG. 5 are an exploded perspective view and an axial sectional view of a second embodiment of the present invention.

In this second embodiment, a step portion 26 formed at the end of the front cover 20 ′ on the gear box side is fitted inside an axial cylindrical portion 16 provided at the radial end of the rear cover 10 ′. The front cover 20 ′ bursts by pressing the outer peripheral surface of the step part 26 of the front cover 20 ′ against the inner peripheral surface of the axial tube part 16 of the rear cover 10 ′. Is prevented.

In the second embodiment, as shown in the enlarged perspective view of the second embodiment in FIG. 7 (b), the rear surface which is the gear box side of the external spline member 17 ′ of the rear cover 10 ′ with the inner surface facing up. Set the snap ring 30 '.

Next, when the abutments 32 'and 32' of the snap ring 30 'are closed with pliers, the snap ring 30' is fully immersed in the back of the external spline member 1 7 'so that it can be integrated with the front cover 20'. Become. In this state, the front cover 20 is placed from above, and the outer peripheral surface of the step portion 26 formed on the front cover 20 ′ is fitted to the inner peripheral surface of the axial tube portion 16 of the rear cover 10 ′. Like that. The external spline member 17 'mates with the internal spline of the front cover 20'.

Since the snap ring engagement groove provided on the inner peripheral side of the front cover 20 ′ and the subsequent snap ring 30 ′ attachment / detachment method are the same as in the first embodiment, the description thereof is omitted. . The second implementation is shown in (b) of Fig. 9. The form of the rear cover 10 'and the front cover 20' is shown fitted tightly via the snap ring 30 '.

Next, FIG. 3 and FIG. 6 are an exploded perspective view and an axial sectional view of a third embodiment of the present invention.

In the third embodiment, the front cover 20 '' and the rear cover 10 '' are in contact with each other at the end surfaces in the axial direction.

In the third embodiment, an annular band 40 is attached to the outer peripheral surface of the front cover 20 '', and the annular band 40 is used to cover the front cover 20 ''. Strikes are prevented.

The annular band 40 is a seamless ring, the width and thickness of which are set according to the required strength, and the material is stainless steel, steel, aluminum, glass fiber, etc. It is selected according to. Then, it is annularly attached to the outer peripheral surface of the front cover 20 ″ by a method such as shrinking, cooling, screwing, or bonding.

Also in the third embodiment, the snap ring 30 "is interposed in the fitting portion between the rear cover 1 0" and the front cover 2 0 ", so that the both are prevented from coming off in the axial direction. The procedure for attaching the snap ring 30 '' is the same as that in the first and second embodiments, and the description thereof is omitted.

In the second embodiment of the present invention, since the claw 25 and the hole 15 are not required, the structure thereof is simplified, and there is an advantage that it can be manufactured by press molding capable of mass production.

In the third embodiment, the shapes of the front cover 20 '' and the rear cover 10 '' are further simplified.

Next, the torque transmission path according to the present invention will be described.

First, as shown in Fig. 10 (a), K1 torque transmission takes the path K1 torque input-front cover 20 → first hub 14 → K1 torque output. In this case, since the second clutch Κ2 is not engaged, the second clutch Κ2 only idles and does not participate in torque transmission. Next, as shown in Fig. 10 (b), K 2 torque transmission is as follows. The route is torque output. In this case, conversely, the first clutch is idling and the second clutch transmits torque.

Therefore, in such a torque transmission path, the K 1 torque input from the engine side is transmitted to the gear box side without passing through the fitting portion between the rear cover 10 and the front cover 20. Thus, the problem that the conventional structure had, that is, the first clutch that also serves as the starting clutch had to transmit a large torque at the start and an engine rotation vibration at the low speed, was solved.

Furthermore, according to the structure of the present invention, since the cup-shaped front cover 20 directly supports the piston load, the conventional end plate and the snap ring for stopping it are not necessary.

By the way, the fact that the cup-shaped front cover 20 directly supports the piston load means that the end plate Ε の of the first clutch K 1 is in direct contact with the inner surface of the front cover 20. Then, when the first clutch K 1 is engaged, an oil pool is formed and a cushion is formed. As a result, the clutch engagement may not be smooth, and the end plate Ε による may not be cooled sufficiently by the lubricating oil. Problems also arise.

Therefore, in order to solve the above problems, in the present invention, the radial groove 20 c is provided in the load receiving surface 20 b on the inner surface of the front cover 20. In the embodiment of FIG. 11, 10 grooves 20 c are formed every 36 degrees in the circumferential direction. However, this is only an example, and it goes without saying that it is not limited to such a configuration.

As described above, according to the present invention, smooth clutch engagement is possible when the first clutch K 1 is engaged, and the cooling performance of the end plate EP of the first clutch K 1 by the lubricating oil can be improved. .

Industrial applicability

According to the component storage structure of the wet clutch pack of the present invention, the K 1 torque transmission Can be prevented from passing through the fitting portion between the rear cover and the front cover. Also, the number of parts in the wet clutch pack parts storage structure can be reduced.

In addition, the snap ring can be easily attached and detached when necessary for maintenance while the snap ring is built-in.

Claims

The scope of the claims

1. In the wet clutch pack component storage structure consisting of a front cover connected to the engine side and a rear cover arranged on the gear box side,

The front cover is bent at approximately 90 degrees in a radial end portion to form a cup shape extending to the gear box side,

Component storage structure for wet clutch pack.

2. The component storage structure for a wet clutch pack according to claim 1, wherein the front cover and the rear cover are fitted on the gear box side.

3. The component storage structure of the wet clutch pack according to claim 1 or 2, wherein a plurality of claws formed in the axial direction on the front cover are fitted into holes provided in the rear cover.

4. A step portion formed at an end portion of the front cover on the gear box side is fitted to an axial cylindrical portion provided at a radial end portion of the recovery cover, and the rear cover and the front cover are prevented from being detached. Snap that can be removed through a notch provided in the front cover in a snap ring engaging groove provided on the inner peripheral side of the front cover so that it contacts the back surface of the external spline member provided on the rear cover The component storage structure for a wet clutch pack according to claim 1 or 2, wherein the wet clutch pack is a ring.

5. The component storage structure for a wet clutch pack according to claim 1 or 2, wherein an annular band is mounted on the outer peripheral surface of the front cover.

6. The retaining of the rear cover and the front cover can be removed from the groove for snap ring engagement provided on the outer peripheral side of the rear cover and the inner peripheral side of the front cover through the notch provided on the front cover. The component storage structure for a wet clutch pack according to any one of claims 1, 2, 3, and 5, wherein the component snap ring is used.

7. The component storage structure for a wet clutch pack according to any one of claims 1 to 6, wherein a radial groove is provided on a load receiving surface of the front cover.

8. The wet clutch pack is a wet dual clutch pack, before starting The component storage structure for a wet clutch pack according to any one of claims 1 to 7, wherein torque from the engine side is transmitted to the gear box side without passing through a fitting portion between the rear cover and the front cover.