JPH0729033Y2 - Vehicle master cylinder - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a master cylinder of a bar handle vehicle,
In particular, the present invention relates to a vehicle master cylinder in which an operation feeling of an operation lever can be selected by changing a lever ratio.

[Prior Art] For example, in a master cylinder disclosed in Japanese Utility Model Laid-Open No. 62-105895, a master cylinder is arranged in a direction orthogonal to a bar handle, and is pivotally supported by a lever bracket attached to the bar handle. The operated lever is rotated in the direction of the bar handle to push the piston in the master cylinder to generate hydraulic pressure in the master cylinder.

[Problems to be solved by the device]

However, with the above-described structure, the operation feeling due to the reaction force of the piston when the hydraulic pressure transmitted to the operation lever is generated cannot be changed.

Therefore, an object of the present invention is to provide a vehicle master cylinder in which the operation feeling of the operation lever can be selected by changing the lever ratio.

[Means for Solving the Problems]

To achieve the above object, the present invention provides a vehicle in which a master cylinder is arranged in a direction orthogonal to a bar handle, and a piston in the master cylinder is pushed by the rotation of an operating lever to generate hydraulic pressure in the master cylinder. In the master cylinder for use, at least one of the master cylinder and the pivot of the operating lever is provided so as to be movable in the axial direction of the bar handle.

[Action]

With this configuration, when either or both of the rotation fulcrum of the master cylinder and the operation lever are moved in the axial direction of the bar handle, the distance from the rotation fulcrum of the operation lever to the piston pushing point of the master cylinder changes and the lever You can change the ratio.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment of the present invention.
A holder 3 of a master cylinder 2 is attached to the bar handle 1.

The holder 3 has a substantially L-shape in plan view in which the support arm 3b of the operation lever 4 is extended toward the front of the vehicle body toward the inside of the master cylinder support portion 3a from the vehicle body. Is formed in parallel with the axis of the bar handle 1 and wider than the width of the master cylinder 2, and two master cylinder support arms 3d, 3d are extended to the front of the vehicle body at the lower portions on both sides of the dovetail groove 3c.

The master cylinder 2 has a bottom portion 2b formed on the bottom side of the cylinder hole 2a and is fitted into the dovetail groove 3c of the holder 3 so as to be movable in the axial direction of the bar handle 1 so that the cylinder bore 2a
It is arranged in a direction orthogonal to the bar handle 1 with the end 5a of the piston 5 mounted liquid-tightly and movably on the front side of the vehicle body.

Also, the master cylinder 2 has a bracket 2c at the bottom of the body.
Is formed, and a bolt 6 which is horizontally mounted between the master cylinder support arms 3d and 3d of the holder 3 is screwed into the female screw hole 2d of the bracket 2c.

As a result, when the bolt 6 is rotated, the master cylinder 2
Moves parallel to the axial direction of the bar handle 1.

The operation lever 4 is pivotally supported by the support arm 3c of the holder 3 by a support shaft 7, the grip portion 4a is substantially parallel to the bar handle 1, and the end portion is extended to the outside of the vehicle body. On the handle 1 side, a guide groove with which the end 5a of the piston 5 abuts
4b is formed.

Therefore, when the bolt 6 is rotated, the master cylinder 2
Moves in parallel to the axial direction of the bar handle 1, so that the support shaft 7 moves from the contact point between the operating lever 4 and the end 5a of the piston 5.
It is possible to change the operation feeling due to the reaction force of the piston 5 when the hydraulic pressure transmitted to the operation lever 4 changes due to the change of the distance between the operation lever 4 and the lever ratio.

3 and 4 show a second embodiment of the present invention,
The master cylinder 10 is supported by an operation lever 12 rotatably supported by a support arm 11a of a lever bracket 11 attached to the bar handle 1, and is arranged in a direction orthogonal to the bar handle 1 so that a piston 13 The end portion 13a is in contact with the piston pushing portion 11b of the lever bracket 11.

The lever bracket 11 has a substantially L-shape in a plan view in which the support arm 11a of the operation lever 12 is extended toward the front of the vehicle body toward the inside of the vehicle body of the piston pushing portion 11b, and the operation lever 12 is supported by the support shaft 11a. Is supported by a guide groove 11c on which the end portion 13a of the piston 13 abuts on the front surface side of the vehicle body of the piston pushing portion 11b.
Are formed.

The operation lever 12 has a master cylinder support 12a on the support shaft 14 side.
On the outside of the body of the master cylinder support 12a.
Are connected to each other and arranged substantially parallel to the bar handle 1.

A master cylinder moving space 12c, which communicates from the bar handle 1 side to the front side of the vehicle body, is formed in the central portion of the master cylinder supporting portion 12a so as to be wider than the width of the master cylinder 10. A bolt 15 penetrating in the vehicle body width direction is inserted.

The master cylinder 10 has an insertion hole 10b for inserting the shaft portion 15a of the bolt 15 at the bottom side of the cylinder hole 10a, and the shaft portion 15a of the bolt 15 is inserted through the insertion hole 10b.
The master cylinder 10 is engaged with the circumferential grooves 15b, 15b formed in a.
The screws 16, 16 for holding the screw are screwed from the front side of the vehicle body.

With this configuration, as in the above embodiment,
When the bolt 15 is rotated, the master cylinder 10 moves parallel to the axial direction of the bar handle 1, so the piston pushing part
The distance from the contact point between 11b and the end 13a of the piston 13 to the support shaft 14 changes, the lever ratio changes, and the operation feeling due to the reaction force of the piston 13 when hydraulic pressure is transmitted to the operation lever 12 is generated. Can be changed.

FIG. 5 shows a third embodiment of the present invention, in which the master cylinder 20 is attached to the bar handle 1 by enclosing the bar handle 1 with a half body 21 screwed to the bottom side of the cylinder hole. The end portion 22a of the piston 22 is disposed in the direction orthogonal to the bar handle 1 with the front side of the vehicle body.

The operation lever 23 is supported by the support shaft 24 at the end of the lever bracket 25.
The lever bracket 25 is rotatably supported by 25a, and the lever bracket 25 is
The bar handle 1 is wrapped in a half-split body 26 screwed to the base end 25b, and is parallel to the master cylinder 20.
Installed on.

Further, a guide groove 23a with which the end portion 22a of the piston 22 abuts is formed on the bar handle 1 side of the operation lever 23.

With this configuration, the lever ratio can be changed by moving either or both of the master cylinder 20 and the lever bracket 25 in the axial direction of the bar handle 1.

[Effect of device]

As described above, according to the present invention, at least one of the master cylinder arranged on the bar handle along the traveling direction of the vehicle and the pivoting fulcrum of the operation lever of the master cylinder is provided so as to be movable in the axial direction of the bar handle. Therefore, by moving at least one of the rotation fulcrum of the master cylinder or the operating lever in the axial direction of the bar handle, the lever ratio changes and the reaction force of the piston when hydraulic pressure is transmitted to the operating lever causes You can change the operation feeling and select the operation feeling according to the rider's preference.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a master cylinder showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a second embodiment of the present invention. FIG. 4 is a plan view of a master cylinder showing an example, FIG. 4 is a sectional view taken along line IV-IV of FIG. 3, and FIG. 5 is a plan view of a master cylinder showing a third embodiment. 1 …… Bar handle, 2,10,20 …… Master cylinder, 3
...... Holder, 4,12,23 ...... Operating lever, 5,13,22 ...... Piston, 5a, 13a, 22a ...... Piston end, 6,15 ...... Bolt, 11,25 ...... Lever bracket

Claims (1)

[Scope of utility model registration request] 1. A vehicle master cylinder in which a master cylinder is arranged in a direction orthogonal to a bar handle, and a piston in the master cylinder is pushed by the rotation of an operating lever to generate hydraulic pressure in the master cylinder. A master cylinder for a vehicle, wherein at least one of the master cylinder and a pivotal fulcrum of an operation lever is provided so as to be movable in an axial direction of a bar handle.