JPH0430422Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch device suitable for vehicles, particularly automobiles.

As is well known in the art, the friction plate clutch device widely used in automobiles, etc. consists of a clutch plate equipped with a clutch facing that frictionally engages the flywheel of the engine when the clutch is engaged, and a damper spring. The clutch hub includes a clutch hub that is rotated in conjunction with the clutch plate through the clutch hub, and a clutch output shaft that is spline-connected to the clutch hub, and the clutch output shaft normally constitutes the input shaft or drive pinion of the transmission. . By separating the pressure plate, which presses the clutch facing against the flywheel of the engine, against the biasing force of the elastic device, the clutch hub is connected to the spline-connected clutch. By sliding in the same direction on the output shaft, the frictional connection between the clutch facing and the flywheel is broken and the clutch is disengaged. However, for various reasons, for example, abrasion particles from the friction material forming the clutch facing enter the spline connection and prevent the clutch hub from moving in the axial direction, which often results in poor clutch disengagement. It was hot.

This invention was devised for the purpose of solving the problem of disconnection of the friction plate clutch device mentioned above.
A clutch device having a clutch plate equipped with a clutch facing that frictionally engages with a flywheel of an engine, a clutch hub that is rotated in conjunction with the clutch plate, and a clutch output shaft that is spline-connected to the clutch hub, The clutch output shaft center line and the clutch hub center line are aligned, and the spline outer teeth of the clutch output shaft are inclined in the engine rotation direction with respect to the center line, or the spline inner teeth of the clutch hub are aligned with the center line of the clutch hub. The object of the present invention is to provide a clutch device which is characterized in that the clutch device is inclined in the direction of reverse rotation of the engine with respect to the line.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The reference numeral 10 in the figure generally indicates a clutch device, which includes a clutch plate 16 having a clutch facing 14 on its outer periphery that frictionally engages with a flywheel 12 of an engine (not shown). There is. A retaining plate 20 is fixed to the clutch plate 16 in a substantially parallel manner via a stop pin 18, and a hub plate 22 having a substantially disc shape is interposed between both plates 16 and 20. The stop pin 18 is connected to the hub plate 22. Since the hub plate 22 freely passes through the elongated hole, relative rotation about the axis is allowed between the hub plate 22 and the clutch plate 16. Also, the hub plate 22, the clutch plate 16 and the retaining plate 2
A damper spring 24 consisting of a plurality of coil springs is interposed between the hub plate 22 and the hub plate 22, and the radially inner end of the hub plate 22 is integrally connected to a cylindrical clutch hub 28 having spline internal teeth 26 on the inner periphery. is combined with A spline external tooth 32 of a clutch output shaft 30, that is, a drive pinion of the transmission, is fitted into the spline internal tooth 26 of the clutch hub 28 so as to be slidable in the axial direction. In the illustrated embodiment, the splined internal teeth 26 of the clutch hub are
Ignoring machining errors, the clutch output shaft is formed parallel to the axis, while the spline external teeth 32 of the clutch output shaft are formed at a minute angle θ with respect to the axis.
It is intentionally processed to be inclined at an angle of (θ=0.4' to 40'). (Note that intentionally means
This does not mean that the slope is due to a machining error, but rather that the slope is intended to be created. ) 34 is the clutch facing 14
This is a pressure plate that cooperates with the flywheel 12 to compress the flywheel 12. When the clutch is connected, it is elastically pressed toward the flywheel 12 by a pressure spring (not shown), and when the clutch is disengaged, a release (not shown) is pressed against the flywheel 12. The bearing is displaced in a direction away from the flywheel 12 by displacement of the bearing. In addition, in the figure, 36
and 38 are friction washers, 40 is a friction plate, and 42 is a disc spring, which are provided to provide hysteresis necessary for the torque transmission characteristics of the clutch device 10.

In the above configuration, when the clutch is engaged, the pressure plate 34 is pressed to the left in the figure by the pressure spring, causing the friction facing 14 to frictionally engage with the flywheel 12. Therefore, the torque of the engine is determined by the flywheel 12, friction facing 14,
clutch plate 16, damper spring 24,
It is transmitted via the hub plate 22, clutch hub 24, splined internal and external teeth 26 and 32 to the clutch output shaft or drive pinion 30. Furthermore, when the clutch is disengaged, the pressure plate 34 is displaced to the right in the figure via a release bearing (not shown), so normally the friction facing 14 is separated from the flywheel 12 and moved to the right in the figure. The clutch plate 16 and the clutch hub 28 are also displaced to the right along with the facing, and the transmission of torque from the engine to the clutch output shaft 30 is stopped. However, due to various reasons as mentioned above, such as abrasion powder of the friction facing 14 entering the sliding portion of the spline internal teeth 26 and the spline external teeth 32, the right side of the clutch hub 28 In the past, it often occurred that the displacement was blocked. However, according to the present invention, as shown in the figure, the spline external teeth 32
is processed with an intentional inclination to the axis of θ=0.4' to 40'. In the illustrated case, the engine rotates counterclockwise when viewed from the front side of the engine, and the spline external teeth 32 are twisted to the left at this time, but if the engine rotates clockwise, The spline external teeth 32 are formed to have a right-handed twist, contrary to the drawing. By providing such a slight inclination to the external spline teeth 32, the clutch hub 28 will move away from the flywheel 12 along the spline inclined relative to the centerline immediately after the clutch is disengaged. This solves the problem of clutch disengagement. Also, contrary to the above, the spline external teeth 32 are machined parallel to the axis, and the spline internal teeth 26 are
A similar effect can be achieved by intentionally machining the same slight inclination θ = 0.4' to 40' as above, and in this case, when the engine rotates counterclockwise when viewed from the front, , the spline internal teeth may be twisted to the right, and when the engine rotates clockwise, the spline internal teeth may be formed to be twisted to the left. Note that the clutch plate 16 and clutch hub 2 due to the slight inclination of the spline internal teeth 26 and the spline external teeth 32
8 is clearly completely different from the tooth thrust of a normal helical spline having a large helix angle. Furthermore, the lower limit of the above inclination angle θ is set to 0.4' because at angles smaller than this, machining errors caused by ordinary cutting machines may cause spline teeth with an inclination in the opposite direction to become smaller than the number of teeth. More than half of them appear by chance,
This is because there is a risk that the clutch plate 16 and clutch hub 28 may be moved to the left in the opposite direction to the intended direction, and the poor cutting may not be resolved. This is because not only is it meaningless to eliminate cutting defects, but also there is a risk that an undesirable thrust force in the axial direction will be generated due to the inclination.

As mentioned above, the clutch device according to the present invention has the following features:
A clutch device having a clutch plate equipped with a clutch facing that frictionally engages with a flywheel of an engine, a clutch hub that is rotated in conjunction with the clutch plate, and a clutch output shaft that is spline-connected to the clutch hub, The clutch output shaft center line and the clutch hub center line are aligned, and the spline outer teeth of the clutch output shaft are inclined in the engine rotation direction with respect to the center line, or the spline inner teeth of the clutch hub are aligned with the center line of the clutch hub. The clutch device is characterized by being inclined in the direction of reverse rotation of the engine with respect to the line, and is useful in practice because it can effectively prevent poor clutch disengagement with a simple configuration. .

[Brief explanation of the drawing]

The accompanying drawing is a schematic diagram showing an embodiment of the present invention. 10... Clutch device, 14... Clutch facing, 12... Flywheel, 16... Clutch plate, 24... Damper spring, 2
6...Spline internal teeth, 22...Hub plate,
30...Clutch output shaft, 28...Clutch hub, 32...Spline external teeth.

Claims (1)

[Scope of utility model registration request] A clutch device having a clutch plate equipped with a clutch facing that frictionally engages with a flywheel of an engine, a clutch hub that is rotated in conjunction with the clutch plate, and a clutch output shaft that is spline-connected to the clutch hub, The clutch output shaft center line and the clutch hub center line are aligned, and the spline outer teeth of the clutch output shaft are inclined in the engine rotation direction with respect to the center line, or the spline inner teeth of the clutch hub are aligned with the center line of the clutch hub. A clutch device characterized in that the clutch device is inclined in the direction of reverse rotation of the engine with respect to the line.