JP2867577B2 - Friction clutch - Google Patents

Description

The present invention relates to a friction clutch, and more particularly, to a release bearing assembly which is a component of a pull type clutch cover assembly of a friction clutch. Regarding improvement.

(Prior art) As a friction clutch, a bearing body of a release bearing assembly is arranged to be movable in an axial direction within a predetermined range,
2. Description of the Related Art There is known a type including a pull-type clutch cover assembly having, as a component, a release bearing assembly that can be attached or detached by engaging or disengaging a bearing body and a ring for retaining a diaphragm spring. .

The reason why the release bearing assembly can be divided in this way is to secure a space for attaching and detaching the transmission and to improve the detachability.

Japanese Patent Laying-Open No. 62-37522 discloses a friction clutch for a vehicle of this type. This release bearing assembly is shown in FIG.

FIG. 10 is a structural diagram showing the release bearing assembly in an axial cross section in a state where the bearing body and the retaining ring are connected. In this state, the hub (inner ring) 7 and the retaining ring 3 are kept connected to each other by the interposition of the split ring 4 formed as an annular spring having a circular cross-section and being partially cut away. . In order to disassemble the release bearing assembly, the split cylindrical sleeve 5 whose tip is inclined and thinned is shown together with the hub 7 as shown in FIG.
In the direction (left direction) (FIG. 11), the split ring 4 is pushed and expanded between the inclined portion of the split cylindrical sleeve 5 and the wall of the groove 10 formed in the retaining ring 3, and the outer periphery of the split ring split cylindrical sleeve 5 Position it to ride up. In this state, when the hub 7 is moved in the direction A (rightward) in the figure, the split ring 4 can get over the tip end portion 26 of the hub, and the hub 7 and the holding ring 3 are disassembled. When reassembling, position the split ring 4 in the groove 10 of the holding ring 3 and
The hub 7 is moved in the direction of the retaining ring 3. By this movement, the split ring 4 is pushed and expanded at the tip inclined portion 11 of the hub 7 and can pass over the peak 26. In order to prevent the split ring 4 from coming off during operation, the hub 7 and the retaining ring 3
A stopper 6 is provided between them to prevent the approach.

(Problems to be Solved by the Invention) In the case of the release bearing of the friction clutch disclosed in the above-mentioned publication, the split ring 4,
Three points, split cylindrical sleeve 5 and stopper 6, are required.
Because of the large number, it is easy to forget to attach it when mounting after disassembly. If the cylindrical sleeve 5 is forgotten, the splitting cannot be performed after assembling, and if the stopper 6 is forgotten, there will be problems such as disassembly due to vibration during operation. The dimensional accuracy requirement of the split ring 4 is extremely high because of the relationship with the inner diameter of the retaining ring 3, the outer diameter of the hub 7, and the like. Further, if the friction between the split ring 4 and the split cylindrical sleeve 5 is not larger than the friction between the split cylindrical sleeve 5 and the hub 7, the split cylindrical sleeve 5 is moved in the direction A shown in the drawing in the last step of disassembly. As a result, the hub 7 and the retaining ring 3 cannot be disassembled.

Further, there is a problem that it is necessary to move the split cylindrical sleeve 5 rightward with respect to the hub 7 during reassembly.

In view of the various problems described above, an object of the present invention is to provide a friction clutch in which these disadvantages are improved.

First, an object of the present invention is to provide a friction clutch having a clutch cover assembly in which the number of parts is reduced and there is no risk of forgetting to mount components.

Further, the present invention can prevent the release bearing assembly from being detached during operation, enable safe operation, and have no trouble in disassembling and assembling work, and can reduce the number of disassembling and assembling steps. It is an object to provide a friction clutch having a cover assembly.

Another object of the present invention is to provide a friction clutch in which the mounting part for this disassembly does not require much dimensional accuracy and can sufficiently fulfill its function.

[Configuration of the invention]

(Means for Solving the Problems) The object of the present invention is to mount the first member by arranging the first member movably in a predetermined range in the axial direction and engaging or disengaging the first member and the second member. Or a pull-type clutch cover assembly having a release bearing assembly that can be attached and detached, wherein the friction clutch is provided between the first member and the second member, and has one end position on the second member side. A sleeve disposed slidably in the axial direction on the first member in a range from the other end position, the sleeve extending in the axial direction and having a plurality of elastic members having respective tips on the first member side; Each of the elastic pieces is sandwiched between the shoulders of both the first member and the second member when the sleeve is at the one end position, so that the first member and the second member A claw portion for engaging the The member includes a release groove into which the elastic member is pushed with play through engagement between the second member and the claw portion when the sleeve is not at the one end position. This is achieved by that the first member can be moved through sliding between the second member and the claw portion by being pushed into the escape groove via the member.

(Operation) In assembling the friction clutch, the sleeve is located at one end position on the second member side, and the distal end of the elastic piece is sandwiched between the shoulders of both the first member and the second member. When the first member and the second member are actuated, the first member and the second member are pushed together in a direction perpendicular to the axis due to the thickness of the tip of the elastic piece of the intervening sleeve, and thereby the clutch can be used. become.

In the disassembly, when the first member is moved in a direction approaching the sleeve and the second member and is located at a position other than the one end position, preferably at the other end position, each elastic piece is displaced. Is pressed by a second member with play into a relief groove formed in the first member. Accordingly, the force for connecting the first member and the second member is weakened, and the second member and the tip claw portion of the elastic piece can slide, so that the first member is pulled away from the second member together with the sleeve. Can be moved. Thereby, the first member and the second member are separated from each other, and the transmission can be detached.

(Embodiment) A friction clutch having a pull-type clutch cover assembly according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 9 is a sectional view of a principal part in the axial direction of the friction clutch of this embodiment. The friction clutch includes a flywheel 20 transmitting the rotation of the engine, a clutch disk 21 transmitting the rotation, and a pressure plate 22 pressing the clutch disk toward the flywheel. And a release fork 24 for moving the diaphragm spring 23, which applies a pressing force through the shaft, in the direction A (rightward) in the drawing in order to separate from the fulcrum of the presser plate, and at a position for cutting the friction clutch. . The diaphragm spring 23 is held by a holding ring 3 which forms a part of a release bearing assembly,
The retaining ring 3 is engaged with a bearing main body 2 constituting a release bearing assembly. A sleeve 1 is interposed between the inner race 2b of the release bearing main body 2 and the retaining ring 3, and a claw portion at the tip of the sleeve serves to engage the release bearing assembly.

FIG. 1 is an axial sectional view showing the structure of the release bearing assembly, showing a state in which the assembly is separated. FIGS. 2 to 6 show steps of assembling and disassembling the release bearing assembly. It is explanatory drawing shown every.

FIG. 1 shows a state in which the sleeve 1 has been inserted into the inner race 2b of the bearing body (first member) 2 prior to the assembly of the release bearing assembly. The release bearing body 2 is divided into an outer race 2a and an inner race 2b via a bearing, and a relief groove 2c is formed in the outer race center at the inner race 2b.
It is 2d.

The retaining ring (second member) 3 for retaining the diaphragm spring 23 has a conical notch 3b at its inner tip so that it can be easily inserted into the inner race 2b, and a shoulder 3a at the rear end. And a step slightly lower than the inner surface 3c of the retaining ring.

The sleeve 1 is in contact with the side surface of the outer race 2a of the release bearing body 2 at its flange 1a, and the position shown in FIG. 1 is the other end position.

As shown in the side view of FIG. 8, the steel sleeve 1 is formed with eight thin plate-like elastic pieces 1b extending from the flange portion 1a in the circumferential direction. The elastic piece has a bent portion so as to form a groove bottom having a length corresponding to the bottom surface 3c of the holding ring 3, and further has a step corresponding to the step of the shoulder 3a of the holding ring at the tip 1c. Claw portion is formed.

In FIG. 1, when the inner race 2b of the release bearing body 2 is moved in the direction B (leftward) in the drawing for mounting, the release bearing assembly passes through the state of FIG. 2 and as shown in FIG. 3 is inserted into the inner race 2b. In FIG. 2, the innermost inner surface 3c of the retaining ring 3 pushes the tip claw portion 1c of the sleeve inward in the radial direction, and the elastic piece 1b of the sleeve 1 is elastically sufficiently inserted into the escape groove 2c of the inner race 2b. It is pushed with great play. As shown in FIG. 3, after the inner surface 3c of the retaining ring 3 and the groove of the elastic piece 1b of the sleeve 1 are in contact with each other, and after the shoulder 3a of the retaining ring 3 and the tip 1c of the elastic piece 1b are engaged. Then, the release bearing main body 2 is moved in the direction A (rightward) in the drawing so that the tool pushes and expands between the flange portion 1a of the sleeve 1 and the side portion of the outer race 2a.
In the state shown in FIG. 4, the shoulder 2d of the inner race 2b and the shoulder 3a of the retaining ring 3 are firmly fixed via the tip 1c of the sleeve 1. When the release bearing assembly is connected, the clutch is used. Is done.

When it is necessary to disassemble the release bearing assembly when attaching and detaching the transmission, the release bearing body 2 is moved toward the holding ring 3 in the direction B in the drawing while pulling the sleeve 1 and the inner race 2b with a tool or the like from the state shown in FIG. Move. As a result, the clamping of the inner race 2b and the retaining ring 3 at both shoulders is released (FIG. 5). Next, while the inner race 2b and the sleeve 1 are integrated, the inner race 2b is moved in the direction A which is the opposite direction to the front. The retaining ring 3 is separated from the inner race 2b and the sleeve 1 while pushing the respective elastic pieces 1b toward the escape groove 2c side of the inner race 2b by the inner surface 3c thereof (FIG. 6).
In this state, the release bearing assembly is disassembled, and the transmission and the like are detached.

FIG. 7 shows the structure of a release bearing assembly of a friction clutch having a pull type clutch cover according to another embodiment of the present invention. In this case, the engagement between the retaining ring 3 and the inner race 2b is good because the tip 1c of the elastic piece 1b of the sleeve 1 is formed thick, but the manufacturing cost is higher than that of the above-described embodiment. Is also somewhat expensive.

As mentioned above, when detaching the transmission,
Insert a tool 60 such as a screwdriver between the holding ring 3 and the flange 1a of the sleeve, and fix the flange 1a of the sleeve to A
The retaining ring 3 at the end of the sleeve
1c separates from the sleeve 1 by riding on the inner surface 3c of the retaining ring 3 (FIG. 20). However, there is a possibility that the positioning of the flange portion 1a and the inner race 2a of the sleeve is deformed by the tool. Therefore, an even force does not work over the entire circumference of the flange portion 1a of the sleeve,
In the worst case, the retaining ring 3 may not be separated from the sleeve 1. In this case, there is a problem that a hole for inserting a tool such as a screwdriver must be provided all around the cover. Therefore, as shown in FIGS. 17 to 19, a cylindrical reinforcing member 50 which is in contact with the flange portion 1a and the inner peripheral boss portion of the sleeve is connected to the sleeve 1. In this case, the outer periphery of the flange portion 50a of the reinforcing member 50 is made coincident with the outer periphery of the flange portion 1a of the sleeve, and is prevented from expanding in the radial direction. The inner peripheral boss 50b extends to a position short of the elastic piece 1b of the sleeve.
The function of 1b is secured. Therefore, by using the sleeve 1 in combination with the reinforcing material 50, the deformation of the flange 1a of the sleeve and the inner race 2a is prevented, and the flange 1 is moved when the sleeve 1 is moved by securing a certain strength. The force is applied uniformly over the entire circumference of 1a, and the entire flange portion is deformed so that the retaining ring 3 is reliably separated from the sleeve 1.

12 to 15 are explanatory views showing the steps of disassembling the release bearing assembly when attaching and detaching the transmission at each stage, and correspond to FIGS. 4 to 5. FIG. FIG. 16 shows a release bearing assembly corresponding to FIG. 5, in which the clutch is used.

〔The invention's effect〕

In the present invention, it has a sleeve interposed between the first member and the second member, the sleeve is slidable on the first member, and has a plurality of elastic pieces each having a distal end portion. When the sleeve is located at one end position on the second member side on the first member, the end of the elastic piece is sandwiched between the shoulders of both the first member and the second member. And the sleeve is pushed into a relief groove formed in the first member via the second member when the sleeve is not at the one end position, so that the release bearing assembly is provided. Since only one sleeve, which does not require much dimensional accuracy, is required for parts that can be disassembled, it is possible to reduce the number of parts, not only to reduce the number of assembly steps, but also to forget to insert parts. Without disassembly after assembly Or summer, or to remove the risk of leaving by vibration or the like during operation, has fallen and can provide a friction clutch comprising a release bearing assembly.

[Brief description of the drawings]

FIG. 1 is an axial sectional view showing the structure of a release bearing assembly constituting a pull-type clutch cover assembly in a friction clutch according to an embodiment of the present invention when disassembled, and FIGS. FIG. 7 is an explanatory view showing disassembly and assembly means of the release bearing assembly of FIG. 1; FIG. 7 is a side view showing the structure of a release bearing assembly of a friction clutch having a pull type clutch cover according to another embodiment of the present invention; 8 is a side view showing the structure of one embodiment of the sleeve used in the present invention, FIG. 9 is an axial sectional view showing the main structure of the friction clutch of one embodiment of the present invention, and FIG. FIG. 11 is an axial sectional view showing the structure of the release bearing assembly of the friction clutch of FIG. 11; FIG. 11 is a view for explaining a disassembly method of the release bearing assembly of FIG. 10; 12 to 16 are explanatory views showing disassembly means of a release bearing assembly provided with a reinforcing member on a sleeve used in the present invention, and FIG. 17 is used in the present invention. FIG. 18 is a side sectional view showing the structure of the sleeve and the reinforcing member, FIG. 18 is a front view showing the structure of the sleeve and the reinforcing member used in the present invention, and FIG. 19 is the structure of the sleeve and the reinforcing member used in the present invention. FIG. 20 is an explanatory view showing the disassembly of the release bearing assembly of the present invention. 1 ... sleeve, 1a ... flange, 1b ... elastic piece, 1c ... tip, 2 ... release bearing body, 2a ... outer race, 2b ... inner race, 2c ... groove (release groove) ), 2d ... inner lace shoulder, 3 ... retaining ring, 3a ... retaining ring shoulder, 3b ... notch, 3c ... retaining ring inner surface, 4 ... split ring, 5 ... split cylindrical sleeve, 6 …… stopper, 7 …… hub (inner race),

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16D 23/14 F16D 25/08

Claims (1)

(57) [Claims] A release bearing assembly capable of being mounted or dismounted by engaging or disengaging a first member and a second member by disposing a first member movably in a predetermined range in an axial direction; A friction clutch comprising a pull-type clutch cover assembly having a first member and a second member interposed between the first member and the second member in a range between one end position and the other end position on the second member side. Equipped with a sleeve slidable on the top in the axial direction,
The sleeve has a plurality of elastic pieces extending in the axial direction and having respective distal ends on the first member side, and each of the elastic pieces has a first shape when the sleeve is at the one end position. A claw portion which is sandwiched between shoulder portions of both the one member and the second member and couples the first member and the second member is provided at a tip thereof, and the first member is provided when the sleeve is not at the one end position. A release groove into which the elastic member is pushed with play through engagement between the second member and the claw portion, and the elastic member is pushed into the release groove through the second member. A friction clutch, wherein the first member can be moved through sliding between the second member and the claw portion.