JPH03219117A - Outer pull type clutch device - Google Patents

Abstract

PURPOSE:To improve feeling at the time of connecting/disconnecting a clutch by providing a circular tapered surface on one of a pressure plate and a push rod at the connection part therebetween, and thereby eliminating inclination of the pressure plate with a simple structure. CONSTITUTION:A clutch plate 5 and a friction plate 6 are pressurized by a pressure plate 14 under an ON state of the clutch device 1, and torque is transmitted. A rotary shaft 12 is rotated with operation of a clutch lever 13, a push rod 11 is moved in a direction of an arrow (a). The pressure plate 14 is pulled in the same direction, the above pressurizing force is eliminated and torque transmission is inturrupted. In the clutch device 1 of the above-mentioned structure, the push rod 1 is engaged with the pressure plate 14 through a spherical tapered surface 11a-1 and a recessed engagement surface 19a. When the push rod 11 is inclined by the deformation of a clutch cover 10, accompanied by the rotation of the rotary shaft 12, the inclination is not transmitted to the pressure plate 14. Feeling of connecting/disconnecting the clutch is thus improved.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an outer pull type clutch device that is a sweep of a multi-disc clutch.

(Prior Art) This type of outer pull type clutch device is connected and disconnected by moving the pressure plate in the axial direction by a push rod that engages with the pressure plate. By converting the rotary motion of the freely rotatable rotary shaft into linear motion of the bushing rod using a rack and pinion mechanism,
A pressure plate that engages the bushing rod is moved axially.

(Problem to be Solved by the Invention) Incidentally, in the conventional outer pull type clutch device, the pressure plate and the bushing rod were engaged in a planar manner via a bear link. When the cover member is deformed due to this, the bushing rod becomes tilted, and this inclination directly becomes the inclination of the pressure plate, resulting in a bad feeling when the clutch device is engaged or disconnected.

Therefore, if the thickness of the cover member is increased to increase its rigidity, another problem arises in that the cover member becomes heavier.

The present invention has been made in view of the above problems, and its purpose is to eliminate the inclination of the pressure plate with a simple structure and to improve the feel of connection and disconnection without causing an increase in the weight of one part. The object of the present invention is to provide an outer pull type clutch device that can be easily maintained.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a multi-plate clutch, and an outer pull that is connected and disconnected by moving a pressure plate in the axial direction by a push rod that engages the pressure plate. The clutch device is characterized in that an annular tapered surface is provided on an engaging portion of at least one of the pressure plate and the push rod.

(Function) According to the present invention, since the pressure plate and the bushing rod are slidably engaged with each other through the tapered surfaces, even if the bushing rod is tilted during actuation of the pushrod or during manufacturing and assembly, this tilt will be directed toward the pressure plate. It doesn't get transmitted, and the pressure plate doesn't tilt. As a result, it is possible to maintain good contact/disconnection feeling of the clutch device with a simple structure without resorting to measures such as increasing the rigidity of other parts.

(Example) An example of the present invention will be described below based on the accompanying drawings.

FIG. 1 is a longitudinal sectional view of an outer pull type clutch device according to the present invention, and FIG. 2 is an enlarged detailed view of section A in FIG. 1.

In the illustrated outer pull type clutch device 1, a drum-shaped clutch housing 2 is rotatably supported on a rotating shaft 3, and a spline is fitted inside the clutch housing sink 2 to the end of the rotating shaft 3. A matching clutch boss 4 is provided. The outer periphery of eight annular clutch plates 5 are engaged with the clutch housing 2, and these clutch plates 5 are movable in the axial direction at appropriate intervals. Eight annular friction plates 6 are arranged between the clutch plates 5 and are engaged with the clutch boss 4 so as to be movable in the axial direction at the inner circumferential portion thereof. or are arranged. A gear 9 is attached to the clutch housing 2 via a damper 7 and a pin 8, and the gear 9 is a gear ( (not shown).

On the other hand, a push rod 11 is movably supported in opposition to the rotating shaft 3 on the inside of the clutch cover 10 that covers the clutch housing 2, clutch boss 4, etc. It is rotatably supported perpendicular to the rod 11, and the rotation of this rotation shaft 12 is converted into movement of the bush rod 11 in the axial direction (in the direction of arrow a in FIG. 1) by a rack and pinion mechanism. One end of a lever 13 is connected to the upper end of the rotating shaft 12 protruding from the clutch cover 10, and the other end of the lever 13 is connected to a clutch lever (not shown) via a wire (not shown). ) is connected to.

Incidentally, the tip of the bushing rod 11 is rotatably engaged with the inner diameter of a pressure plate 14 via a pole bearing 15, and the pressure plate 14 is connected to a plurality of grooves protruding from the clutch boss 4. A washer 17 and the pressure plate 1 are connected to each of the boss portions 4a (only one is shown) with bolts 16.
4, the clutch plates 5... and the friction plates 6... are biased in the direction of pressing in the axial direction, and when the clutch device 1 is in the ON state, As shown in the figure, the outer peripheral end surface of the pressure plate 14 is seated under a predetermined pressure on the clutch plate 5 located at the outermost side (the rightmost end in FIG. 1).

Here, push rod 11 and pressure plate 1
2, the flange portion 11a integrally provided at the tip of the push rod 11 is formed with a spherical annular tapered surface 11a-1. The tapered surface 11a-1 engages with an engagement surface 19a, which is a concave spherical surface, formed on one end surface of an annular engagement member 19 bonded to the inner race 15a of the ball bearing 15. There is.

Next, the operation of the outer pull type clutch device 1 will be explained.

In the ON state shown in FIG. 1, the clutch plates 5... and the friction plates 6... are pressed by the pressure plate 14 as described above, so that the rotational power of the drive shaft (not shown) is A gear (not shown) connected to the gear 9,
Clutch housing 2, clutch plate 5..., friction plate 6
-... and is transmitted to the rotating shaft 3 via the clutch boss 4,
The rotating shaft 3 is driven to rotate at a predetermined speed.

When a clutch lever (not shown) is squeezed during a gear change operation, etc., a wire (not shown) is pulled and the rotating shaft 12 is rotated, and as described above, the rotation of the rotating shaft 12 is controlled by the rack. This is converted into movement of the push rod 11 in the direction of the arrow a in FIG. 1 by the push rod and pinion mechanism. When the push rod 11 is pulled in the direction of the arrow a in FIG.
... is pulled in the same direction against the elastic force of the clutch plate 5.
... and the friction plates 6 ... are released from the pressed state by the pressure plate 14, and a frictional resistance force of the size necessary for power transmission is not generated between the two, so that the rotation of the clutch housing 2 is caused by the clutch boss 4. The clutch housing 2 freely rotates on the rotating shaft 3, and the transmission of the rotational power of a drive shaft (not shown) to the rotating shaft 3 is cut off.

However, when the rotating shaft 12 rotates, the clutch cover 10 may be torsionally deformed and the bushing rod 11 may be tilted with respect to the axis of the rotating shaft 3. In this embodiment,
Since the push rod 11 and the pressure plate 14 are slidably engaged through the spherical tapered surface 11a-1 and the concave spherical retaining surface 19a, even if the push rod 11 is tilted as described above, this tilt will not be affected. The pressure is not transmitted to the pressure plate 14, and the pressure plate 14 does not tilt. As a result, the clutch device 1 can maintain a good connection/disconnection feeling with a simple configuration, without having to take measures such as increasing the thickness of the clutch cover 10 to increase its rigidity.

Furthermore, when the clutch lever (not shown) is released, the pressure plate 14 again pushes and rotates the clutch plates 5, . . . and the friction plates 6, due to the elastic force of the springs 18. l is in the ON state, and the rotational power of the drive shaft is transmitted to the rotating shaft 3 as described above.

Next, push rod 11 and pressure plate 14
Alternative embodiments of the sliding engagement are shown in FIGS. 3 to 5, respectively.

In the embodiment shown in FIG. 3, the spherical tapered surface 11a-1 of the bushing rod 11 is formed directly on the inner race 15a of the ball bearing 15, resulting in a concave spherical engagement surface 15a-1.
In the embodiment shown in FIG. 4, a conical tapered surface 11a-2 is formed on the push rod 11, and this
It is engaged with a part of the inner diameter corner of 5a.

Further, in the embodiment shown in No. 5I2I, the flange portion 11a of the push rod 11 is connected to the ball bearing link 1 as in the conventional case.
The ball bearing 15 is supported so as to be tiltable relative to the pressure plate 14 via a retaining member 20 which is spherically engaged with the pressure plate 14.

Therefore, in the embodiments shown in FIGS. 3 to 5 above, the same effect as that obtained in the previous embodiment can be obtained without the inclination of the push rod 11 being transmitted to the pressure plate 14. .

(Effects of the Invention) As is clear from the above description, according to the present invention, the outer pull type clutch includes a multi-plate clutch and is connected and disconnected by moving the pressure plate in the axial direction by a bushing rod that engages the pressure plate. In the device, since an annular tapered surface is provided on the engaging portion of at least one of the pressure plate and the push rod, the pressure plate and the push rod are slidably engaged with each other by the tapered surface, and when the push rod is operated, Even if the bushing loft is disturbed during manufacturing and assembly, this inclination will not be transmitted to the pressure plate side, so the pressure plate will not be inclined, and the clutch can be easily constructed without using other means such as a rigid outer. This has the effect of keeping the connection/disconnection feeling of the device good.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of an outer pull type clutch device according to the present invention, Fig. 2 is an enlarged detailed view of section A in Fig. 1, and Figs. 3 to 5 are sliding engagements between the push rod and the pressure plate. It is a partial sectional view showing a modification example of. DESCRIPTION OF SYMBOLS 1... Outer pull type clutch device, 11... Bush rod, 1la-1... Annular tapered surface, 14...
...Pressure plate Figure 3

Claims (1)

[Claims] In an outer pull type clutch device which is a multi-disc clutch and is connected and disconnected by moving a pressure plate in the axial direction by a push rod that engages the pressure plate, an engagement portion of at least one of the pressure plate and the push rod is provided. An outer pull clutch device characterized by having an annular tapered surface.