JPS6228546Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device that facilitates play adjustment of a control lever of a vehicle hydraulic master cylinder used in motorcycles, tricycles, small snowmobiles, and the like.

2. Description of the Related Art Hydraulic pressure operating devices for brakes and clutches used in vehicles are configured to transmit the operating stroke of a control lever to a master cylinder, and to be operated by the hydraulic pressure of the master cylinder. A certain dead stroke is provided in the master cylinder so that hydraulic pressure is not always generated, that is, hydraulic pressure is generated only when the operating lever is actuated, and this causes play in the operating lever. The amount of play of this operating lever differs depending on the rider, and there has been a desire for a device that can easily adjust this amount of play.

Therefore, the present invention was devised in view of the above points, and an adjusting piece that moves the push rod forward and backward from the operating lever is rotatably provided in the inserting hole of the operating lever, and the gap between the adjusting piece and the inserting hole of the inserting piece is sealed. The purpose of this is to provide a control lever adjustment device that allows the rider to easily adjust the play amount of the control lever. The purpose is to prevent dust.

The present invention will be explained below based on an illustrated embodiment.

A hydraulic master cylinder body 2 is fixed to a handle 1 of a motorcycle, tricycle, small snowmobile, etc. and operates a brake or clutch, etc. A piston 4 is slidably inserted into a cylinder 3, and a cylinder 3 is inserted in front of the piston 4. The piston 4 is constantly pushed in the backward direction by a return spring 5 contracted in the piston 4.
Note that 6 is a retraction limit stopper for the piston 4, 7 is a boot, and 8 is a reservoir.

An operating lever 11 is rotatably supported on a lever mounting portion 9 of the hydraulic master cylinder body 2 by a shaft 10. As shown in FIG. A piston pushing portion 12 protruding from the base of the operating lever 11 is provided with a piece-fitting hole 13 in the same direction as the shaft 10 .

The adjusting piece 14, which is rotatably inserted into the piece fitting insertion hole 13, has a body portion 14a having a circular cross section, and recesses 15a, 15b, 1 having different depths on its outer periphery.
5c and 15d are sequentially formed in the circumferential direction, and a tool engaging groove 16 is formed on the upper surface of a collar portion 14b that is integrally provided at the upper portion of the body portion 14a.

A tapered surface 14c is formed on the peripheral edge of the flange portion 14b, and a tapered surface 1 having a gentler slope than the tapered surface 14c is formed on the inner peripheral surface of the piece fitting insertion hole 13 corresponding to the tapered surface 14c.
Form 3a.

A guide hole 17 is formed in a portion of the piston pushing portion 12 of the operating lever 11 that faces the piston 4 and extends approximately in the axial direction of the piston 4 to the bridge insertion hole 13, and a push rod 18 can freely move in and out of the guide hole 17. and one end of it is inserted into the adjustment piece 14.
The other end of the piston 4 is engaged with one of the recesses 15a to 15d, and the tip surface of the piston 4, which is pushed in the backward direction by the return spring 5, is in contact with the other end. In FIG. 1, a stopper part 19 formed at the base of the operating lever 11, which is rotated counterclockwise, is pressed against a part of the hydraulic master cylinder body 2, and by the pushing force of the return spring 5. The push rod 18 is prevented from coming off, and the push rod 18 is engaged with one of the recesses 15a to 15d.
Measures are also being taken to prevent this from happening.

Therefore, when the adjustment piece 14, which is rotatably provided in the piece insertion hole 13 of the operating lever 11, is rotated by a tool engaged with the tool engagement groove 16, the positions of the recesses 15a to 15d change, and the push rod is rotated. 18 moves forward or backward relative to the operating lever 11 depending on the depth of the engaged recesses 15a to 15d, and moves the piston 4 by that amount, so the invalid stroke amount of the piston 4 is adjusted, and therefore the rider The amount of play of the operating lever 11 is adjusted according to the user's preference.

Tapered surface 1 of the piece fitting insertion hole 13 and the adjusting piece 14
3a and the tapered surface 14c is the sealing member 20.
This prevents sand, etc. from entering the gap.

For example, as shown in FIGS. 1 and 2, the seal member 20 uses a cover made of an elastic material that covers the upper surface of the flange 14b of the adjustment piece 14. This cover prevents the cover from falling off by pushing the leg portion 20a protruding from the lower center surface into the tool engagement groove 16 of the collar portion 14b, and the flange portion 20b formed at the outer edge of the cover is inserted into the piece fitting insertion hole 13. It is inserted between the tapered surfaces 13a and 14c with the adjustment piece 14 with a resilient force. Therefore, since the tapered surface 14c is pushed by the inner circumferential edge of the flange portion 20b, the adjustment piece 14 is pushed from the periphery toward the center and also pushed downward, preventing the adjustment piece 14 from coming off and wobbling. Since the surface 13a is sloped more gently than the tapered surface 14c, the cover will not slip out from between the piece fitting insertion hole 13 and the adjusting piece 14. In this case, if the upper surface of the cover is provided so as not to protrude beyond the upper surface of the operating lever 11, there is no possibility that the upper surface of the cover will come into contact with the hydraulic master cylinder body 2 due to rotation of the operating lever 11. Further, as another example of the sealing member 20, an O-ring may be inserted as shown in FIG.

Note that the adjusting piece 14 is not limited to having recesses of different depths in the body having a circular cross section as described above, but for example, the shaft portion on which the push rod 18 comes into contact is formed into a polygonal shape, and the center of the shaft portion is formed into a polygonal shape. The adjustment piece may be offset from the center of rotation, or the push rod 18 itself may be formed into a polygonal shape.
The push rod 18 may be moved forward and backward from the operating lever 11 in stages, such as one rotatably provided on the operating lever 11 so as to eccentrically rotate the push rod 18.

Further, the tool engaging groove 16 is not limited to a "hexagonal hole" groove or a "-" groove as in both of the above embodiments, but may be appropriately selected such as a "+" groove. Further, in the embodiment described above, the operating lever 11 is pivoted on the hydraulic master cylinder body 2, but it may be pivoted on other components.
is fixedly installed and the operation lever 11 is manually operated, but the mounting position of this cylinder body 2 is not limited to the handle 1, and the operation lever 11 is a manual one.
It may also be a foot pedal.

As described above, the push rod can be moved forward and backward in stages by rotating the adjustment piece, so the play of the operating lever can be adjusted with a simple operation, and the adjustment piece and piece fit together. Since the gap with the hole is closed with the sealing member, it is possible to prevent sand and the like from entering the gap, allowing smooth adjustment, and also helping to prevent the adjuster piece from coming off and backlash.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the operating lever adjusting device of the present invention, FIG. 2 is a cross-sectional view taken from FIG. 1, FIG. 3 is a sectional view showing main parts of the operating lever adjusting device, and FIG. 5 is a perspective view showing an example of the adjusting piece, FIG. 5 is a sectional view of the adjusting piece shown in FIG. 4, and FIG. 6 is a sectional view showing another example of the seal member. 2 is a hydraulic master cylinder body, 3 is a cylinder, 4
1 is a piston, 5 is a return spring, 10 is a shaft, 11 is an operating lever, 13 is a piece fitting hole, 14 is an adjustment piece, 17 is a guide hole, 18 is a push rod, and 20 is a sealing member.

Claims (1)

[Claims for Utility Model Registration] 1. In an operating device that supplies pressurized fluid to brakes and clutches by pushing the rear end surface of the piston of a hydraulic master cylinder with a push rod provided on an operating lever, the push rod is moved forward and backward by the operating lever. An operating lever adjustment device for a hydraulic master cylinder for a vehicle, characterized in that an adjusting piece is rotatably provided in a piece fitting hole of an operating lever, and a gap between the adjusting piece and the piece fitting hole is covered with a sealing member. 2. The operating lever adjustment device for a hydraulic master cylinder for a vehicle according to claim 1, wherein the sealing member is a cover that covers the upper surface of an adjustment piece. 3. The operating lever adjustment for a hydraulic master cylinder for a vehicle according to claim 1, wherein the sealing member is an O-ring interposed between the adjustment piece and the piece fitting hole. Device.