JPH0123879Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a master cylinder operating lever device, particularly to a master cylinder operating lever device provided on a bar handle of a motorcycle, a tricycle, etc.

[Conventional technology]

As a master cylinder attached to a bar handle, for example, as shown in Japanese Utility Model Publication No. 51-25409, an operating lever is pivotally supported on a forked lever support arm formed on the master cylinder with a stepped support bolt,
The piston pushing part of the operating lever pushes the piston of the master cylinder, and the return spring that biases the operating lever in the release direction is connected to the groove bottom of the forked lever support arm of the master cylinder and the rotation fulcrum of the operating lever. It is known that the structure is shortened between the two parts.

[The problem that the idea aims to solve]

However, when the operating lever is pivotally supported on the bifurcated lever support arm using a stepped support bolt, the return spring must also be installed at the same time, making assembly difficult, and the space for installing the return spring is particularly narrow. Therefore, the work was difficult.

This invention was developed against this background.
It is an object of the present invention to provide a master cylinder operating lever device that facilitates assembly of a return spring.

[Means to solve the problem]

In order to achieve the above object, the present invention pivots an operating lever to a forked lever support arm formed on a master cylinder with a stepped support bolt, and pushes the piston of the master cylinder with the piston pushing portion of the operating lever. In the moving master cylinder, the opposing first
A U-shaped retainer in which a wall and a second wall are connected by a connecting wall is attached to the rotation fulcrum of the operating lever, and both sides of the operating lever perpendicular to the axis of the stepped support bolt are connected to the first wall and the second wall. The inner surface of the connecting wall is mounted so as to face the side surface of the opposite piston pushing portion of the operating lever with respect to the stepped support bolt, and the connecting wall and the rotation fulcrum of the operating lever are A return spring is compressed between the stepped support bolt and the master cylinder side, and the first and second walls of the U-shaped retainer and the rotation fulcrum of the operating lever are connected to the forked lever support arm. 1st
The stepped support bolt is disposed between the arm and the second arm,
The first arm and the second arm of the forked lever support arm and the rotation fulcrum part of the operating lever are inserted through the first and second walls of the U-shaped retainer so that the U-shaped retainer can be rotated. and tightening the stepped support bolt to the forked lever support arm so that the stepped portion of the stepped support bolt and the first portion of the forked lever support arm are
The U-shaped retainer is fixed to the forked lever support arm by holding either the first wall or the second wall of the U-shaped retainer between the arm or the second arm. It is something.

[Effect]

Therefore, the return spring is pre-assembled between the operating lever and the U-shaped retainer before being attached to the master cylinder, and is further attached to the master cylinder together with the operating lever and the U-shaped retainer in this assembled state.

〔Example〕

An embodiment of the present invention will be described below based on the drawings.

An operating lever 3 is rotatably supported on a bifurcated lever support arm 2 formed integrally with the master cylinder 1 at its pivot point 4 by a stepped support bolt 5 . The rotation fulcrum portion 4 of the operating lever 3 includes:
A mounting recess 19 for the return spring 20 is provided on the master cylinder side with the stepped support bolt 5 in between.
Locking convex portions 6, 6 are formed on the side opposite to the master cylinder to restrict the backward limit of the operating lever 3, respectively.

A U-shaped retainer 7 is attached to the pivot point 4 of the operating lever 3 so as to hold it therein. This U-shaped retainer 7 has a first wall 7a and a second wall facing each other.
One side of the wall 7b is connected by a connecting wall 7c to form a U-shaped cross section, and the first wall 7a has a bolt insertion hole 7d, and the second wall 7b has a bolt insertion hole 7d with a smaller diameter than the bolt insertion hole 7d. A hole 7e is formed in each of the first wall 7a and the second wall 7b, and the engagement convex portions 6, 6 of the operating lever 3 are formed at the end of the stepped support bolt 5 on the side opposite to the master cylinder. Contact portions 7f, 7f corresponding to the connection wall 7c are provided, and the return spring 2
0 mounting protrusions 18 are provided.

Then, this U-shaped retainer 7 is attached to the rotation fulcrum 4 of the operating lever 3, and both side surfaces 4a and 4b perpendicular to the axis of the stepped support bolt 5 are attached to the first wall 7a.
and the second wall 7b, and the inner surface of the connecting wall 7c is mounted so as to face the opposite side surface 4c of the piston pushing part of the operating lever 3 with respect to the stepped support bolt 5, and the mounting recess of the operating lever 3 is A return spring 20 is compressed between the U-shaped retainer 19 and the mounting protrusion 18 of the U-shaped retainer.

This U-shaped retainer 7 is disposed within the forked lever support arm 2. That is, the U-shaped retainer 7
The first wall 7a is between the first arm 2a of the forked lever support arm 2 and one side surface 4a of the rotation fulcrum part 4,
Further, the second wall 7b is connected to the second wall 7b of the forked lever support arm 2.
The first portion of the forked lever support arm 2 is inserted between the arm 2b and the other side surface 4b of the rotation fulcrum portion 4, respectively.
The arm 2a, the bolt insertion hole 7d of the first wall 7a of the U-shaped retainer 7, the rotation fulcrum part 4 of the operating lever 3, the bolt insertion hole 7e of the U-shaped retainer 7b.
and a U-shaped retainer 7 with a stepped support bolt 5 inserted through the second arm 2b of the forked lever support arm 2.
The second wall 7b of the U-shaped retainer 7 is held between the stepped portion 5a of the stepped support bolt 5 and the inner surface of the second arm 2b of the forked lever support arm 2, and the stepped support bolt 5 is rotatably supported. A nut 8 that is screwed onto the tip of the supporting bolt 5
, the stepped support bolt 5 is tightened to the forked lever support arm 2, and the U-shaped retainer 7 is fixed to the forked lever support arm 2.

Note that the bolt insertion hole 7d may have a smaller diameter than the bolt insertion hole 7e, and the stepped support bolt 5 may be inserted from the second arm 2b side of the forked lever support arm 2. In this case, the first wall 7a of the U-shaped retainer 7 is connected to the stepped portion 5a of the stepped support bolt 5 and the forked lever support arm 2.
It is held between the inner surface of the first wall 2a and the inner surface of the first wall 2a.

Further, an adjustment bolt 10 is screwed into the rear end portion 12 of the piston 11 of the master cylinder 1 so as to be freely retractable.
is fixed. The rear end 10 of the adjustment bolt 10
The piston pushing portion 9 of the operating lever 3 comes into contact with a.

Therefore, the connecting wall 7 of the U-shaped retainer 7
A return spring 20 is compressed in advance between the mounting protrusion 18 of c and the mounting recess 19 of the operating lever 3 corresponding to the mounting protrusion 18, and the U-shaped retainer 7 is connected to the rotation fulcrum of the operating lever 3. 4, the U-shaped retainer 7 and the rotation fulcrum part 4 of the operating lever 3 are arranged on the forked lever support arm 2, and the U-shaped retainer 7 is supported by the forked lever with the stepped support bolt 5. When fixed to the arm 2, the return spring 20
The operating lever 3 is attached to the master cylinder 1 together with the U-shaped retainer 7, and the operating lever 3 is biased in the releasing direction by a return spring 20.
The engagement convex portion 6 of the operating lever 3 contacts the contact portion 7f of the U-shaped retainer 7, and the backward limit is restricted.

[Effect of idea]

As explained above, in the present invention, the return spring of the operating lever is compressed in advance between the U-shaped retainer and the rotation fulcrum of the operating lever, the U-shaped retainer is assembled to the operating lever, and these are bifurcated. Since the U-shaped retainer is fixed to the forked lever support arm, the return spring can be easily assembled in advance to the operating lever before the master cylinder is attached using the U-shaped retainer. This has the advantage that the return spring can be assembled more easily in a shorter time than in the past.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the vehicle hydraulic master cylinder of the present invention, and Fig. 2 is a - of Fig. 1.
3 is a cross-sectional view taken from FIG. 1, and FIG. 4 is a perspective view of the U-shaped retainer. 1... Master cylinder, 2... Forked lever support arm, 2a... First arm, 2b... Second arm, 3...
Operation lever, 4... Rotation fulcrum, 5... Stepped support bolt, 6... Locking convex portion, 7... U-shaped retainer, 7a... First wall, 7b... Second wall, 7c... …
Connection wall, 7f... Contact part, 9... Piston pushing part, 10... Adjustment bolt, 11... Piston, 1
8... Mounting protrusion, 19... Mounting recess, 20... Return spring.

Claims (1)

[Scope of utility model registration request] An operating lever 3 is pivotally supported by a stepped support bolt 5 on a forked lever support arm 2 formed on a master cylinder 1, and a piston 11 of the master cylinder 1 is pushed by a piston pushing portion 9 of the operating lever 3. In the cylinder, a U-shaped retainer in which opposing first and second walls 7a and 7b are connected by a connecting wall 7c is attached to the rotation fulcrum portion 4 of the operating lever 3 so as to be perpendicular to the axis of the stepped support bolt 5. Both sides 4a and 4b of the operating lever 3 are connected to the first wall 7a and the second wall 7b.
At the same time, the inner surface of the connecting wall 7c is mounted so as to face the opposite side surface 4c of the piston pushing part of the operating lever 3 with respect to the stepped support bolt 5, and the connecting wall 7c and the operating lever 3 are A return spring 20 is compressed between the rotation fulcrum portion 4 and the stepped support bolt 5 on the master cylinder side.
The wall 7b and the rotation fulcrum portion 4 of the operating lever 3 are connected to the first arm 2a and the second arm 2 of the forked lever support arm 2.
b, and the stepped support bolt 5 is arranged between the first arm 2a and the second arm 2b of the forked lever support arm 2.
The stepped support bolt 5 is inserted through the first wall 7a and the second wall 7b of the U-shaped retainer together with the rotation fulcrum portion 4 of the operation lever 3 to rotatably support the U-shaped retainer 7. is tightened to the forked lever support arm 2, and the stepped portion 5 of the stepped support bolt 5 is tightened.
a and one of the first arm 2a or the second arm 2b of the forked lever support arm 2, and the U-shaped retainer 7
An operating lever device for a master cylinder, characterized in that the U-shaped retainer 7 is fixed to the forked lever support arm 2 by sandwiching either the first wall 7a or the second wall 7b.