JPH0577648U - Clutch device - Google Patents

Abstract

(57) [Abstract] [Purpose] To simplify the process of attaching the clutch cover and ring gear to the flywheel. This clutch device includes a flywheel 1 connected to an input side member, a clutch cover assembly 2 including a clutch cover 10 and a pressure plate 12,
The clutch disc assembly 3 is arranged between the pressure plate 12 and the flywheel 1, and the ring gear 6 fitted to the outer peripheral surface of the clutch cover 10 and fixed to the flywheel 1. Clutch cover 10
The outer peripheral end 10a is fitted to the outer peripheral surface of the flywheel 1, and the pressure plate 12 is arranged at a position facing the flywheel 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a clutch device, and more particularly to a clutch device in which an outer peripheral portion of a clutch cover is fitted on an outer peripheral surface of a flywheel.

[0002]

[Prior Art]

 The clutch device includes a flywheel, a clutch cover assembly fixed to the flywheel, and a clutch disk assembly disposed between the flywheel and the clutch cover assembly. When the clutch cover assembly is attached to the flywheel, a flange portion is provided on the outer peripheral portion of the clutch cover, and this flange portion is fixed to the flywheel side surface with bolts or the like. In this case, the outer diameter of the flywheel is increased by the flange portion of the clutch cover as compared with the outer diameter of the clutch disc assembly.

Further, for the purpose of downsizing the flywheel, a clutch cover mounting structure as disclosed in Japanese Utility Model Laid-Open No. 50-1762 is shown. In this structure, the outer peripheral portion of the clutch cover is fixed to the outer peripheral surface of the flywheel. Therefore, the flange portion of the clutch cover in the conventional structure is unnecessary, and the outer diameter of the flywheel can be made closer to the outer diameter of the clutch disc assembly.

[0004]

[Problems to be solved by the device]

 In the structure disclosed in the above-mentioned conventional publication, the outer peripheral portion of the clutch cover is fixed to the outer peripheral surface of the flywheel with bolts. However, because the outer peripheral surface of the flywheel is a curved surface, it is not possible to secure a sufficient seating surface for the bolt, and the bolt will loosen after long-term use, and the shearing force from the clutch cover will directly act on the bolt, and It may be broken.

By the way, a ring gear with which a pinion of a starter motor meshes is usually fixed to the outer peripheral surface of the flywheel by shrink fitting. Therefore, it is considered that the fixing of the ring gear can be used to easily and reliably fix the outer peripheral portion of the clutch cover to the outer peripheral surface of the flywheel. An object of the present invention is to use a ring gear to easily and securely fix the clutch cover outer peripheral portion to the flywheel outer peripheral surface.

[0006]

[Means for Solving the Problems]

 A clutch device according to the present invention includes a flywheel connected to an input member, a clutch cover assembly having an outer peripheral portion fitted to an outer peripheral surface of the flywheel, and a clutch cover assembly including a pressure plate facing the flywheel. It has a clutch disc assembly arranged between the pressure plate and the flywheel, and a ring gear fitted to the outer peripheral surface of the clutch cover and fixed to the outer peripheral portion of the flywheel.

[0007]

[Action]

 In the clutch device of the present invention, the outer peripheral surface of the clutch cover is fitted to the outer peripheral surface of the flywheel, and the ring gear is fitted to the outer peripheral surface of the clutch cover. Therefore, it is possible to fix the ring gear on the outer peripheral wall surface of the flywheel and the clutch cover at the same time, simplify the assembling process, and securely fix the clutch cover to the outer peripheral portion of the flywheel.

[0008]

【Example】

 FIG. 1 shows a clutch device to which an embodiment of the present invention is applied. In the figure, the clutch device is mainly composed of a flywheel 1, a clutch cover assembly 2, and a clutch disc assembly 3. A flex plate 4 for mounting a clutch device is fixed to the engine side, and the clutch device is arranged between the flex plate 4 and the front housing 5 of the transmission.

The flywheel 1 is a substantially annular member, and one side surface of the flywheel 1 is fixed to the flex plate 4. The other side is a friction surface against which the clutch disc is pressed. The clutch cover assembly 2 includes a clutch cover 10, a diaphragm spring 11 and an annular pressure plate 12, which are arranged in the clutch cover 10, respectively.

The clutch cover 10 is formed in a dish shape and has a large-diameter hole in the center. The outer peripheral wall 10a of the clutch cover 10 extends in the axial direction, and its end portion is fitted to the outer peripheral surface 1a of the flywheel 1. Further, as shown in FIG. 3, a plurality of slits 10b are formed at predetermined intervals at the end of the outer peripheral wall 10a of the clutch cover 10.

On the other hand, a ring gear 6 is shrink-fitted on the outer peripheral portion of the clutch cover 10. The ring gear 6 has a gear portion 6a on its outer peripheral portion that meshes with the pinion of the starter motor. Further, holes 10c, 1c for axially positioning the clutch cover 10 are formed in the outer peripheral wall 10a of the clutch cover 10 and the outer peripheral surface 1a of the flywheel 1, respectively. A pin 20 for preventing rotation is inserted in each.

The diaphragm spring 11 is a disk-shaped member that is arranged concentrically with the clutch cover 10, and a substantially middle portion in the radial direction is supported by the clutch cover 10 via the wire ring 13 and the like. Further, the outer peripheral end portion thereof abuts on the plurality of protruding portions 12b of the pressure plate 12, and elastically presses the pressure plate 12 toward the flywheel 1 side. The inner peripheral end of the diaphragm spring 11 is in contact with the release device 14, and the clutch disc assembly 3 is released by pushing the inner peripheral end toward the engine side (the left side in the drawing). There is.

The clutch disc assembly 3 has a friction material 3a, and the friction material 3a is sandwiched between the pressing surface 1a of the flywheel 1 and the pressing surface 12a of the pressure plate 12 to connect the clutch. . Next, the order of assembling the present clutch device will be described. First, the clutch cover 10 is assembled with the diaphragm spring 11 and the press sharp rate 12 to assemble the clutch cover assembly 2. Also, assemble the clutch disc assembly 3. Then, the clutch disc assembly 3 is arranged in the clutch cover assembly 2, and the flywheel 1 is further inserted in the clutch cover assembly 2. At this time, the hole 10c of the clutch cover 10 and the hole 1c of the flywheel 1 are aligned, the pin 20 is inserted into these holes 10c and 1c, and the flywheel 1 is fixed to the clutch cover assembly 2.

In this state, the ring gear 6 is heated. Further, the clutch cover 10 and the flywheel 1 are cooled if necessary. Next, the ring gear 6 whose inner diameter is expanded by heating is fitted to the outer peripheral portion of the clutch cover 10, and shrink fitting is performed. Here, although the inner diameter of the ring gear 6 is reduced after shrink fitting, a plurality of slits 10c are formed in the outer peripheral wall 10a of the clutch cover 10, so that the inner diameter dimension of the clutch cover 10 is reduced due to a processing error. Even if the ring gear 6 is larger than the above, the ring gear 6 bends inward as the ring gear 6 contracts, and the ring gear 6, the clutch cover 10 and the flywheel 1 are firmly fixed.

After assembling the clutch device in this way, the flywheel 1 is applied to the flex plate 4 and the two are connected by the bolt 21. A window hole for work is provided in a part of the transmission hanger, and the bolt 21 is tightened using this window hole. The flex plate 4 is fixed to the crankshaft on the engine side in advance with bolts 20.

As described above, when the ring gear 6 is shrink-fitted to the flywheel 1, the clutch cover 10 is also fixed to the outer peripheral surface of the flywheel 1 at the same time. Therefore, conventionally, the ring gear 6 is fixed to the flywheel 1. Furthermore, the two steps of attaching the clutch cover 10 to the flywheel 1 can be completed in one step. Further, since the clutch cover 10 and the flywheel 1 are fitted over substantially the entire outer periphery of the clutch cover 10, the clutch cover 10 and the flywheel 1 can be more firmly fixed for a long period of time as compared with the conventional structure in which a plurality of bolts are used for fixing. ..

Further, a fastening member such as a bolt is not required, which is inexpensive, and the weight as a whole can be reduced. [Other Embodiments] (a) In the above embodiment, when the flywheel 1 is fitted into the clutch cover 10, holes 10c and 1c are provided in the clutch cover 10 and the flywheel 1 in advance, and these holes are formed in these holes. Although the pin 20 is inserted to position the both in the axial direction, a configuration as shown in FIG. 4 may be used. That is, in this example, the contact surface 30b is formed on the inner peripheral side of the outer peripheral wall 30a of the clutch cover 30 at the step portion whose inner diameter decreases from the large diameter portion. The contact surface 30b is cut, and when the flywheel 1 is fitted to the clutch cover 30, the right side surface of the flywheel 1 in the figure contacts the contact surface 30b, so that the flywheel 1 and the clutch cover 30 are in contact with each other. Axial positioning is performed.

In this case, the pin 20 in the above embodiment is unnecessary. (B) In the above embodiment, the inner peripheral surface of the outer peripheral wall 10a of the clutch cover 10 is not specially processed, but in order to increase the inter-plate frictional force between the clutch cover 10 and the outer peripheral surface of the flywheel 1. Either or both of the inner peripheral surface of the clutch cover 10 and the outer peripheral surface of the flywheel 1 may be knurled or the like.

In this case, the pin 22 is unnecessary. (C) In the above embodiment, the present invention is applied to the push type clutch device, but the present invention can be applied to the pull type clutch as well.

[0020]

As described above, in the present invention, the outer peripheral end of the clutch cover is fitted to the outer peripheral surface of the flywheel, and the ring gear is fitted to the outer peripheral part of the flywheel. When shrink fitting, the clutch cover can be fixed to the flywheel at the same time, and the process can be simplified. In addition, the clutch cover can be fixed more firmly than when the clutch cover is fixed to the flywheel with bolts.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a clutch device according to an embodiment of the present invention.

FIG. 2 is a partial sectional view of FIG.

FIG. 3 is a partial plan view of FIG.

FIG. 4 is a diagram corresponding to FIG. 2 in another embodiment.

[Explanation of symbols]

 1 Flywheel 2 Clutch cover assembly 3 Clutch disc assembly 6 Ring gear 10 Clutch cover 12 Pressure plate

Claims (1)

[Scope of utility model registration request] 1. A flywheel connected to an input member, a clutch cover assembly including a clutch cover having an outer peripheral portion fitted to an outer peripheral surface of the flywheel, and a pressure plate facing the flywheel, and the pressure plate. A clutch device comprising: a clutch disc assembly disposed between the flywheel and a ring gear; and a ring gear fitted to an outer peripheral surface of the clutch cover and fixed to an outer peripheral portion of the flywheel.