JPS62137417A - Release structure of pull-type friction clutch - Google Patents

Abstract

PURPOSE:To simplify a release structure and to facilitate assembling work by bringing the second claw of a release york lever having a support shaft mounted on a clutch housing into contact with a pin or a boss of a release bearing, and subsequently putting same between the first and second claws. CONSTITUTION:A pin 19 is mounted on an outer bearing case 13, and a release york lever 16 including the first claw 17 and the second claw 18 is installed around a release york support shaft 29 mounted on a clutch housing 22. At the time of fixing the clutch housing 22 on an engine body 1, the forward end portion of a driven shaft 9 is fitted in a central recess portion 2a of a fly wheel 2, and the second claw 18 is brought into contact with the pin 19. The pin 19 is further pushed and the release york lever 16 is turned, so that the pin 19 is fitted in a groove 30. Thus, a release structure can be simplified, and assembling work can be facilitated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a release mechanism for a pull-type friction clutch that disengages the clutch by pulling the inner peripheral end of a diaphragm spring via a release bearing.

(Prior Art and its Problems) In a pull type friction clutch, as shown in FIG. 4, the release yoke lever 43 must be brought into contact with the release bearing 40 from the diaphragm spring 42 side. However, the direction of assembly of the clutch housing is in the direction of arrow M.

Therefore, in terms of assembly, the unit in which the release yoke lever 43 is engaged with the bearing clear rear 41 is assembled in advance to the clutch housing of the transmission case.
For example, insert a plate-shaped locking spring /I5 into the bearing kitria 41, insert the key 1r rear 41 into the sleeve 46 connected to the inner circumference of the diaphragm spring 42, and insert the spring 45 into the sleeve 46. By avoiding engagement with the sleeve 46 and the key 1! J connecting rear 41
: Sea urchins are turning.

However, in the one shown in FIG. 4, the connection structure between the diaphragm spring 42 and the carrier 41 is complicated.

On the other hand, if the release bearing is assembled in advance on the diaphragm spring side and the housing is sometimes installed by engaging the release yoke lever and the bearing case, then the housing installation takes a very long time.

Also, the release structure of the conventional pull type IFJm clutch)
As Δ, JP-A-53-56451, JP-A-55-
14122, JP-A-59-47527, JP-A-59-7
7130 and Japanese Unexamined Patent Publication No. 59-103031, etc., but both have complicated structures or require housing assembly C.
This work is time-consuming.

(Object of the Invention) An object of the present invention is to provide a release structure for a pull-type friction clutch that is simple in structure and extremely easy to assemble.

(Means for achieving the object) In order to achieve the above object, the present invention provides a release bearing with a pin or boss projecting outward in the radial direction,
The release yoke lever is rotatably supported in the clutch housing of the transmission controller via a release yoke support shaft perpendicular to the clutch axis direction, and the release yoke lever has a short shaft on the side near the 7th frame spring. One pawl and a long second guide pawl on the side far from the diaphragm spring are provided, and when the housing is moved toward the engine body in the direction of the clutch axis and assembled to the engine body,
The first pawl of the release yoke lever that is tilted toward the diaphragm spring side does not come into contact with the U, but the second pawl comes into contact with the pin or boss of the release bearing that has a rotational positioning device, and the assembly is complete.
After that, the bottle or boss fits into the groove between both claws.

(Embodiment) In FIG. 1, a flywheel 2 is fixed to a crankshaft in an engine body 1, and a transmissive case/clutch housing 22 is attached to an end face of the engine body 1.
is fixed. A driven shaft 9 extending from the clutch housing (mission case) 22 to the engine body 1 side
is rotatably fitted into the central recess 2a of the flywheel 2, and the spline hub 8 of the clutch disc assembly 7 is spline-fitted to the outer peripheral spline portion of the limb drive 111119. A clutch cover 3 is housed in the flywheel 2, and a pressure plate 6 is connected to the clutch cover 3 through a leaf spring cap so as to be movable in the axial direction.

A diaphragm spring 5 is arranged on the arrow N direction side of the pressure plate 6.
The outer peripheral end of the diaphragm spring 5 is abutted against and supported by the annular protrusion 3a of the clutch cover 3, and the middle part of the diaphragm spring 5 is abutted against the protrusion 6a of the breather no-play 1-6 by means of a clip or the like so as to be movable in the axial direction. There is. The pressure plate 6 is biased in the direction of arrow M by the elastic force of the diaphragm spring 5, and the facing 11 is held between the pressure plates 1 and 6 and the flywheel 2 in a clutch engaged state. A large number of tongues 5a are formed radially on the inner circumferential side of the diaphragm spring 5 as shown in FIG. and are engaged by a disc spring 24.

The inner race of the release bearing 12 is attached to the outer peripheral surface of the inner bearing case 14 at lN-1f, and the outer race of the outer bearing case 13 is attached to the outer race of the release bearing 12 at Ik? :i has been done. Further, a guide sleeve 15 is fitted on the inner peripheral side of the inner bearing case 14.

A pair of left and right bins 19 are formed on the outer periphery of the outer bearing case 13 and extend outward in the radial direction of the outer bearing case 13 . For example, a bushing having a low coefficient of friction and high wear resistance is fitted onto the outer periphery of the bottle 19.

Two release yoke support shafts are fixed to the clutch housing 22 in FIG. 1 at a distance from and perpendicular to the driven shaft 9, and a release yoke lever 16 is rotatably attached to the two support shafts via a needle bearing. When fitted, the release yoke lever 16 extends to the pin 9, and a 5. A U-shaped first claw 17 and a longer guide second claw 18 are integrally formed. The first pawl 17 is formed on the flywheel 2 side (arrow M direction side), the second pawl 18 is formed on the clutch housing 22 side (arrow N direction side), and between both pawls 17 and 18 there is a groove 3.
0 is formed. The second pawl 18 is gently inclined toward the flywheel 2 side.

For example, the release yoke lever 16 has an operating arm portion 31.
is formed, and the arm portion 31 is interlocked and connected to a clutch operating mechanism (clutch pedal, etc.) outside the clutch housing via a link device (14).

(Function) First, the assembly method will be explained. A clutch cover 3 including a dart flam spring 5, a pressure plate 6, a release bearing 12, an outer bearing case 13, and an inner bearing case 14 is attached to the flywheel 2.
The disk assembly 7 is mounted with its facing 11 sandwiched between the flywheel 2, breather Vp, and plate 6. One-sided ludge housing 22
A support shaft 29 equipped with the release yoke lever 16 is fixed in advance to the holder, and the release yoke lever 16 is moved to the full allowable angle (for example, 38 mm) in the direction of the arrow M shown in FIG.
(degree).

By then moving the clutch housing 22 closer to the engine body 1 side (in the direction of arrow M), the driven shaft 9 passes through the sleeve 15 and engages with the hub 8, and the tip of the driven shaft 9 fits into the central recess 2a of the flywheel 2. At the same time, the first claw 17 passes under the pin 19 without contacting it, and the second claw 18 comes into contact with one pin.

Further, the second pawl 18 is pushed by the pin 19, and the release cork lever 16 is rotated to the set position shown in FIG. In the state shown in FIG. 1, the clutch housing 22 is fixed to the engine body 1.

Although FIG. 1 shows the clutch engaged state, when the release yoke lever 16 is rotated in the direction of the arrow N by the release operation question, the first pawl 17 pulls the release bearing 12 in the direction of the arrow N via the pin 19. . In addition, the inner peripheral end of the diaphragm spring 5 is pulled in the direction of arrow N against its elastic force, and the pressure plate 6 is also pulled in the direction of arrow N together with the diaphragm spring 5, thereby disengaging the clutch.

(Effects of the Invention) As explained above, the present invention provides the release bearing 12
The bearing case 13 is equipped with a release bearing rotational positioning device 13a such as a counterweight, and a pin or boss 19 that protrudes radially outward, and is attached to the clutch housing 22 of the transmitter perpendicular to the clutch axis direction. A release yoke lever 16 is rotatably supported via a release yoke support shaft, and the release yoke lever 16 includes a short first pawl 17 on the side closer to the diaphragm spring 5 and a long guide on the side farther from the diaphragm spring 5. A second pawl 18 is provided for the housing 2.
2 in the clutch axial direction toward the engine body and assemble it to the engine body, the first pawl 17 of the release yoke lever 16, which is tilted toward the diaphragm spring side, does not come into contact with the pin or boss 19, but instead becomes the second pawl. 17 is pin or boss 19
Since the pin or boss 19 is placed in the groove 30 between the claws 17 and 18 after assembly, there are the following advantages. That is: (1) A second guide pawl 18 is installed on the release yoke lever 16 separately from the first pawl 17, and the release bearing 12 has one pin or boss that engages with the release yoke lever 16. Compared to conventional pull-type friction clutches, there is no need for a special connection mechanism between the diaphragm spring and the release bearing, and the release groove is extremely simple.

(2) A long second guide pawl 18 is provided on the side far from the diaphragm spring 5, and when assembling, the release yoke lever 16 is placed on the die 47 phragm spring side.
The bottle or boss 19 is automatically moved by the guide action of the claw 18.
The tM 30 of the release yoke lever 16 fits into the tM 30 of the release yoke lever 16, so the combination is extremely easy to work with.

[Brief explanation of drawings]

Figure 1 shows m of a pull type friction clutch to which the present invention is applied.
rgI side view, Figure 2 is a vertical sectional view of the pull type friction clutch showing the previously assembled state, Figure 3 is a perspective view of the pull type friction clutch showing the previously assembled state, and Figure 4 is the conventional FIG. 2 is a vertical cross-sectional view, not showing the release structure, of the pull-type friction clutch of FIG. 5...Diaphragm spring, 12...Release bearing, 13...Outer bearing case,
13a... Release bearing rotational positioning device (
Counter weight), 16... Release yoke lever, 17... First pawl, 18... Second pawl, 19...
Bin, 22...Clutch housing, 29...Release yoke lever support shaft, 30...Groove Patent applicant: Daikin Seisakusho Co., Ltd. Representative Patent attorney: Tadataka Oshiki:・j正j'、、knee 11
“i, 2JIl::ii,・-1 Figure 2 Figure 1

Claims (1)

[Claims] In a pull-type friction clutch that disengages the clutch by pulling the inner peripheral end of a diaphragm spring through a release bearing, the release bearing is provided with a pin or boss that protrudes radially outward, and the clutch axis is attached to the clutch housing of the transmission. The release yoke lever is rotatably supported via a release yoke support shaft perpendicular to the direction, and the release yoke lever has a short first pawl on the side close to the diaphragm spring and a long guide pawl on the side far from the diaphragm spring. A second pawl is provided, and when the housing is moved toward the engine body in the direction of the clutch axis and assembled to the engine body, the first pawl of the release yoke lever, which is tilted toward the diaphragm spring side, is the pin of the release bearing that has a rotational positioning device. Alternatively, the release structure of a pull-type friction clutch is characterized in that the second pawl does not come into contact with the boss but contacts the pin or boss, and after assembly, the pin or boss fits in the groove between both the pawls.