JP3177998B2 - clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch, and more particularly to a clutch capable of improving the assemblability of a release connecting member.

[0002]

2. Description of the Related Art In a vehicle, a manual transmission or an automatic transmission is provided as a power transmission mechanism for converting the power of an internal combustion engine mounted thereon into a desired state in accordance with running conditions and taking out the power.

[0003] The manual transmission is provided with a clutch for switching on and off the power of the internal combustion engine when shifting gears.
In order to obtain desired power transmission performance and function, a conventional clutch structure is disclosed in, for example, Japanese Utility Model Publication No. 2-77771.

FIG. 8 shows a clutch release mechanism operated by a clutch pedal. That is, in FIG. 8, reference numeral 112 denotes a clutch, and reference numeral 120 denotes a release shaft as a release communication body. The release shaft 120 has a solid shape. A clutch cable (not shown) connected to a clutch pedal is connected to one end 120-a at one end, and the release shaft 120 has two ends at both ends.
It is held by a light case 122, which is a part of the transmission case, via bushes 124 and 126, and is stopped at a predetermined rotational position in a steady state by a return spring 128. Also, the release shaft 12
Reference numeral 0 denotes a diaphragm spring of a connection mechanism (not shown), the other end of which is connected to the release bearing 132 by the pin 130 via the connection members 120-b and 120-b.
It is connected to a clutch disk (not shown) via a pressure plate.

In the release shaft 120, connecting members 120-b, 120-b are connected to a release bearing 132 by pins 130 at the other end. The release bearing 132 is connected to the clutch disk by a connecting mechanism (not shown). In this clutch release mechanism, the release shaft 1
The clutch disks are released (released) by the operation of the connecting members 120-b, 120-b provided on the motor 20, and the transmission of power of the internal combustion engine (not shown) is interrupted.

[0006]

Conventionally, in a clutch release mechanism, a release shaft, which is a release connecting body, is formed of carbon steel in a solid state, and the release shaft connects a release bearing to a release bearing. Since they are connected via an intermediary, there is a problem that handling is troublesome at the time of assembling, the assembling work becomes difficult, and the material cost and the manufacturing cost increase and the cost becomes high.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a clutch disk having a flywheel fixedly mounted on a crankshaft of an internal combustion engine and having a surface separated from the flywheel. A pressure plate fixed to the input shaft and moved in the axial direction of the input shaft so as to contact the other surface of the clutch disc is provided, and a diaphragm spring for biasing the pressure plate toward the flywheel is provided. A release bearing that moves in the axial direction on the input shaft in contact with the diaphragm spring, and the flywheel covers the outer circumferences of the flywheel, the clutch disc, the pressure plate, and the release bearing. Wheel, the clutch disc, the pressure plate, and the release In a clutch provided with a bearing housed in a transmission case, a release connecting body having one end connected to the release bearing and the other end extending outward from an opening of the transmission case with an intermediate fulcrum therebetween. And a cable connecting portion is provided at the other end of the release fork extending outward from the opening of the transmission case, and the cable connecting portion is centered on the fulcrum portion. A clutch cable for swinging the release fork in the direction of the input shaft is connected to the release fork, and a spring connection portion is provided near the cable connection portion on the release fork. One end of a spring biasing in a direction opposite to the operating direction is connected and provided, and the flywheel of the transmission case is provided. An engaging portion for engaging the other end of the spring is provided on the outer periphery of the opening, and the transmission case covers the opening and a part of the release fork extending outward from the opening. A release fork boot is provided with the cable connection portion and the spring connection portion at the other end of the release fork exposed.

[0008]

According to the structure of the present invention, a plate-shaped release fork is provided as a release connecting body having one end connected to the release bearing and the other end extending outward from the opening of the transmission case with the intermediate fulcrum therebetween. A cable connecting portion is provided at the other end of the release fork extending outward from the opening of the transmission case, and the release connecting fork is swung in the input shaft direction about the fulcrum at the cable connecting portion. The release fork is provided with a spring connection near the cable connection, and one end of a spring that urges the release fork in the opposite direction to the operation direction is connected to the release fork. An engaging portion is provided on the outer periphery of the transmission case on the flywheel side to engage the other end of the spring. Since the release fork boot is provided with a part of the release fork extended outward from the opening and the cable connection part and the spring connection part at the other end of the release fork exposed, the release connection body is used. When assembling a release fork with a release bearing, handling the release fork becomes easier, and the other end of the release fork may be provided with a cable connection section and a spring connection section outside the transmission case. The clutch cable and spring can be mounted outside the transmission case, so that the assembly workability can be improved, and the material and manufacturing costs can be reduced and the cost can be reduced. Can be.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings. 1 to 7 show an embodiment of the present invention. In FIG. 1, power from an internal combustion engine (not shown) rotates a flywheel 6 fastened to the crankshaft 2 by a first fastening bolt 4 from the crankshaft 2, and further a clutch of a clutch 7 from the flywheel 6. The power is transmitted to the input shaft 10 on the axis of the crankshaft 2 via the disk 8. The transmission of the power of the internal combustion engine is performed by the release mechanism 12.
Intermittent by. The clutch 7 is, as shown in FIG.
It is connected to the manual transmission 1.

The release mechanism 12 is operated by a clutch cable 14 operated by operating a clutch pedal (not shown). The clutch cable 14 is positioned by a nut 16 and a stopper pin 18 attached to the clutch cable 14. The stopper pin 18 is fitted to a fitting-shaped cable connection portion 20-a for connecting the clutch cable 14 at one end of a release fork 20 as a release communication body.
This release fork 20 is, as shown in FIGS.
It is formed in a plate shape from carbon steel, and a tip portion 20-b on one end side connected to the release bearing 32 is formed in a fork shape processed into a groove shape.

The release fork 20 is provided with a fixing bolt 2 fastened to a light case 22 which is a part of a transmission case.
1 and a positioning clip 26, as shown in FIG. 1, a distal end portion 20-b on one end side is disposed inside the light case 22, and has a fulcrum portion 20-e in the middle.
The other end of the cable connection portion 20-a is arranged to extend outward from an opening 22 a formed in the light case 22. Accordingly, the release fork 20 has a distal end portion 20-b on one end side connected to the release bearing 32 and a cable connection portion 20 on the other end side sandwiching the intermediate fulcrum portion 20-e.
−a is provided to extend outward from the opening 22 a of the light case 22. The cable connecting portion 20-a for connecting the clutch cable 14 is provided at an extended portion that extends outside the light case 22 at the other end of the release fork 20. Thereby, when the clutch cable 14 is operated by operating the clutch pedal,
The release fork 20 is swung in the direction of the input shaft 10 around the fulcrum 20-e. In addition, two holes 20-f and 20-g are formed near the cable connection portion 20-a in an extension portion extending outside the light case 22 on the other end side of the release fork 20. This forms the spring connection part 20-d. Further, as shown in FIG. 1, an engaging portion 4 is provided on the outer periphery of the light case 22 on the flywheel 6 side corresponding to the spring connecting portion 20-d.
2 protrudes slightly and is formed integrally with the light case 22. The engaging portion 42 and the spring connecting portion 20-d
A spring 28 is provided between the two. One end of the spring 28 is engaged with and connected to a spring connecting portion 20-d of an extended portion that extends outside the light case 22 on the other end of the release fork 20, and
The other end is provided in engagement with the engaging portion 42, and urges the release fork 20 in a direction opposite to the operation direction of the release fork 20 that shuts off the power of the internal combustion engine.
As shown in FIG. 1, the light case 22, which is a part of the transmission case, includes a flywheel 6, a clutch disk 8, a release bearing 32, and a pressure plate 3 described later.
The flywheel 6, the clutch disk 8, the release bearing 32, and the pressure plate 38 are provided so as to cover each outer circumference of the flywheel 8.

The fulcrum 20-e of the release fork 20
Is a connecting portion where the head portion of the fixing bolt 24 fits.

The release fork 20 is formed into a groove shape by one end portion 20-b at one end.
Linked to That is, the tip 2 of the release fork 20
0-b, as shown in FIG.
c is formed. Further, as shown in FIG. 4, a bearing-side opening 3 corresponding to the fork-side opening 20-c is formed in the bearing connecting portion 32-b of the release bearing 32.
2-c is formed. And release fork 2
A connection pin 30 as a connection member is driven into the fork-side opening 20-c of the front end 20-b of the No. 0 from the outside, and the connection pin 30 is inserted into the bearing-side opening 32-c and loosely fitted. By doing so, the distal end portion 20-b on one end side of the release fork 20 is swingably connected to the release bearing 32 by the connection pin 30 and provided.

The bearing surface 32-a of the release bearing 32 is provided in contact with the inner diameter portion 34-a of the diaphragm spring 34. An intermediate portion 34-b of the diaphragm spring 34 is held by a holding portion 36-d of the clutch cover 36. The outer diameter portion 34-c of the diaphragm spring 34 is connected to a pressure plate 38 which is connected to the clutch cover 36 while the clutch 7 is connected.
Is pressing.

The clutch cover 36 has a second fastening bolt 4
0 is fastened to the flywheel 6. The clutch plate 8 is provided between the pressure plate 38 and the flywheel 6. The clutch disk 8 has one surface connected to and separated from the flywheel 6 and the other surface connected to and separated from the pressure plate 38.

When assembling the release fork 20 and the release bearing 32, the connecting pin 30 is driven into the fork side opening 20-c, and the connecting pin 30 is connected to the bearing side connecting portion 3 of the release bearing 32.
As shown in FIG. 6, the release fork 2 is inserted into the bearing side opening 32-c of FIG.
0 is mounted on the release bearing 32. Also,
As shown in FIG. 1, the light case 22 has an opening 22a.
And a part of the release fork 20 extending outward from the opening 22a.
The release fork boot 44 is provided with the cable connection portion 20-a and the spring connection portion 20-d at the other end of the release fork exposed.

Next, the operation of this embodiment will be described.

In FIG. 1, power from an internal combustion engine rotates a flywheel 6 fastened by a first fastening bolt 4 from a crankshaft 2, and further from the flywheel 6 via a clutch disc 8 to an input shaft 10. Is transmitted to

In the above situation, when the driver steps on the clutch pedal, the clutch cable 14 is pulled in the direction of arrow A by the clutch pedal mechanism (not shown).
The cable connecting portion 20-a side of the release fork 20 is pulled by the movement of the stopper pin 18 accompanying the movement of the clutch cable 14. Therefore, the release fork 20
Swings about the portion of the fixing bolt 24 as a fulcrum, and together with the release bearing 32 to which the distal end portion 20-b is connected by the connecting pin 30, an arrow B in the axial direction of the input shaft 10.
Moved in the direction.

Therefore, the bearing surface 32-a of the release bearing 32 presses the inner diameter portion 34-a of the diaphragm spring 34. The diaphragm spring 34 uses the intermediate portion 34-b held by the holding portion 36-d of the clutch cover 36 as a fulcrum, the outer diameter portion 34-c moves in the direction of arrow C, and the pressing force of the pressure plate 38 decreases. Removed. Therefore, the frictional force between the clutch disc 8 and the flywheel 6 is eliminated, and the transmission of power from the crankshaft 2 to the input shaft 10 is cut off.

As a result, the release fork 20 is formed into a plate-shaped release fork 20 and one end of the release fork 20 is swingably provided on a release bearing 32 by a connecting pin 30. An end is extended to the outside of the light case 22, and a spring 28 for urging the release fork 20 in a direction opposite to the operation direction of the release fork 20 for shutting off the power of the internal combustion engine is provided. A cable connecting portion 20-for connecting the clutch cable 14 is provided at an extension portion extending outside the light case 22 of
a and a spring connecting portion 20-d for connecting one end of the spring 28 in the vicinity of the cable connecting portion 20-a, so that when the release fork 20 and the release bearing 32 are assembled, the release fork 20 Handling is easy, and one end of the release fork 20 is connected to the release bearing 32 with the connecting pin 3.
0, the cable connecting portion 20-a and the spring connecting portion 20-d can be collectively provided on the other end side of the release fork 20 outside the light case 22. Since the mounting of the spring 14 and the spring 28 can be performed outside the light case 22, the workability of assembling can be improved, and the material and manufacturing costs can be reduced and the cost can be reduced. The spring 28 has a light case 22 whose one end is located at the other end of the release fork 20.
The spring connecting portion 20 of the extension portion extending outside
-D, and the other end is the light case 22.
The spring 28 can be attached to the light case 22 by being engaged with the engaging portion 42 provided on the outer side of the spring. Engaging part 42 of case 22
To prevent the spring 28 from falling off,
The release fork 20 and the release bearing 32
Can be held. Further, since the engaging portion 42 is formed integrally with the outside of the light case 22, an additional engaging member for attaching the spring 28 is unnecessary, thereby preventing an increase in the number of parts and reducing the number of assembling steps. In addition, the layout can be easily performed as the compact engaging portion 42.

In the above description, only the basic function of the clutch mechanism according to the present invention has been described as an example. However, the present invention is not limited to the above embodiment, and can be used for other clutch mechanisms. It is.

[0023]

According to the present invention described above, a plate-shaped release is formed as a release communication body having one end connected to the release bearing and the other end extending outward from the opening of the transmission case with the intermediate fulcrum therebetween. A fork is provided, and a cable connecting portion is provided on the other end side of the release fork extending outward from the opening of the transmission case, and the cable connecting portion is provided with the release fork in the input shaft direction around the fulcrum portion. The release fork is provided with a spring connecting part near the cable connecting part, and one end of a spring for urging the release fork in the opposite direction to the operating direction is provided on the release fork. An engaging portion for engaging the other end of the spring is provided on the outer periphery of the transmission case on the flywheel side. The release fork boot is provided in a state where the release fork boot is provided in a state where the release fork extending from the opening and the opening is partially covered and the cable connection portion and the spring connection portion on the other end of the release fork are exposed. When assembling the release fork and release bearing, the release fork is easy to handle, and the cable connection and spring connection are provided on the other end of the release fork outside the transmission case. Since the clutch cable and spring can be mounted outside the transmission case, the assembly workability can be improved, and the material and manufacturing costs are reduced and the cost is reduced. obtain.

[Brief description of the drawings]

FIG. 1 is a sectional view of a clutch.

FIG. 2 is a side view of a release fork.

FIG. 3 is a front view of a release fork.

FIG. 4 is a side view of the release bearing.

FIG. 5 is a front view of a release bearing.

FIG. 6 is a front view of a state where a release bearing and a release fork are assembled.

FIG. 7 is a front view of a release mechanism of the clutch.

FIG. 8 is a front view of a conventional clutch release mechanism.

[Explanation of symbols]

 2 Crankshaft 6 Flywheel 10 Input shaft 12 Release mechanism 14 Clutch cable 20 Release fork 28 Spring 30 Connection pin 32 Release bearing 38 Pressure plate

Claims (2)

(57) [Claims] 1. A clutch disk, one surface of which is connected to and separated from a flywheel fixed to a crankshaft of an internal combustion engine, is fixed to an input shaft disposed on the axis of the crankshaft, and is connected to the other surface of the clutch disk. A pressure plate that is moved in the axial direction of the input shaft, a diaphragm spring that biases the pressure plate toward the flywheel is provided, and the diaphragm plate is moved in the axial direction on the input shaft by contacting the diaphragm spring. Rutotomoni provided the release bearing to the said flywheel Kura
Switch disc, the pressure plate, and the release
Cover the outer periphery of each bearing with the flywheel
And the clutch disc and the pressure plate
The release bearing is housed in the transmission case and installed.
In the girder clutch, one end side is the release bearing.
The other end of the transmission is connected to the transmission
A release contact body extending outward from the opening of the case
To provide a plate-shaped release fork,
The release fork extended outward from the opening of
A cable connection is provided on the other end of the cable.
The release fork around the fulcrum is
Connect a clutch cable that swings the input shaft
The release fork is connected to the cable
A spring connection part is provided in the vicinity of the
At the joint, release the release fork in the direction opposite to the operating direction.
One end of the biasing spring is connected and provided,
The outer periphery of the machine case on the flywheel side
An engagement portion for engaging the other end of the transmission with the transmission casing;
The opening extends outward from the opening and the opening
Cover part of the release fork and release the release fork.
The cable connecting portion and the sp
Release fork boot with the ring connection exposed
A clutch provided with: 2. A transmission device provided on an outer periphery of the transmission case,
The engaging portion for engaging the other end of the spring is
2. The apparatus according to claim 1, wherein the apparatus case is formed integrally with the machine case.
The clutch according to 1.