JP2002068067A - Operation lever of bar handle vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To minimize the damage of a turning base part even when the undesired external force is added to an operation lever of a bar handle vehicle, and the external force acts on the turning base part of the operation lever, and to prevent the external force acting on the turning base part to be transmitted to a hydraulic master cylinder, a lever bracket or the like. SOLUTION: Outer parts not interfering with the lever bracket 2c, of an upper face and a lower face of the turning base part 10 of the operation lever 3 are thickened. The thickened parts are used as reinforcement parts 10g and 10h, and the turning base part 10a is reinforced by the reinforcement parts 10g and 10h.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variety of bar handle vehicles, such as motorcycles, motorcycles having a steering handlebar at the front of a vehicle body, three- and four-wheel buggies, snowmobiles, and the like. The present invention relates to an operation lever for a bar handle vehicle such as a brake lever or a clutch lever for operating a brake or a clutch by generating a hydraulic pressure in a hydraulic master cylinder mounted on a bar or pulling a wire cable.

[0002]

2. Description of the Related Art An operation lever for a bar handle vehicle is disclosed in, for example, Japanese Patent Application Laid-Open No. 8-337190. The operation lever includes a pivot base rotatably supported by a lever bracket using a pivot, a working arm for pushing a piston inserted into a cylinder hole of the hydraulic master cylinder, and a body of an accelerator grip. A grip operation section disposed along the front side, and when the rider grips the grip operation section, the working arm rotates with the pivot base around the pivot and the piston moves into the cylinder. It pushes toward the bottom of the hole.

[0003]

In the above-mentioned operation lever, for example, a bar handle vehicle falls down due to a person touching a bar handle vehicle which is mounted on a stand in a bicycle parking lot or the like, and an operation called a lever end is performed. When an unexpected external force is applied to the grip operating portion distal end side of the lever, the external force intensively acts as a bending load on the turning base of the operating lever, and there is a possibility that the turning base may be damaged. Further, the external force applied to the operation lever is transmitted to the lever bracket and the cylinder body of the hydraulic master cylinder, and there is a possibility that parts other than the operation lever such as the lever bracket and the cylinder body may be damaged.

Therefore, the present invention prevents damage to the pivot base as much as possible even if an unexpected external force is applied to the operation lever and the external force acts as a bending load on the pivot base of the operation lever. An object of the present invention is to provide an operation lever for a bar handle vehicle that can prevent external force from being transmitted to a hydraulic master cylinder, a lever bracket, and the like.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a lever bracket at a front side of a handlebar for pivotally supporting a pivotable base on a lever bracket, and a handlebar end grip. A handle operation part is disposed on the front side of the vehicle body to operate a hydraulic master cylinder, a wire cable, etc. connected to a brake or a clutch. It is characterized in that one or both of the lever brackets are overlaid at positions outside the lever bracket to form a reinforcing portion. A groove for breaking may be provided on the grip-facing surface of the grip operation unit.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in more detail with reference to the drawings. A handlebar 1 for steering the front wheels at the front of the body of a bar-handle vehicle is provided with a hydraulic master cylinder device 4 for a front brake, which is a combination of a hydraulic master cylinder 2 and an operation lever 3.

The hydraulic master cylinder 2 includes a handlebar 1
The position inside the vehicle body with respect to the accelerator grip 5 is enclosed by a vehicle body mounting arm 2b integral with the cylinder body 2a and a bracket 6, and these are fastened with bolts and mounted on the handlebar 1 on the vehicle body front side. . A pair of upper and lower lever brackets 2c, 2 are provided on the front side of the cylinder body 2a.
The lever brackets 2c, 2c have coaxial holes formed in the lever brackets 2c, 2c. A bottomed cylinder hole 2d is formed in the cylinder body 2a, and a piston 8 is inserted in the cylinder hole 2d so as to be liquid-tight and movable.

The operating lever 3 has a lever body 10 disposed in front of the accelerator grip 5 on the vehicle body and an operating arm 11a brought into contact with the rear end of the piston 8 in the cylinder hole 2d. A gripper adjusting mechanism 9 is disposed between the working arm 11a of the knocker 11 and the working arm facing portion 10c of the lever body 10 with a knocker 11 disposed between the two. .

The lever body 10 includes a lever bracket 2
a rotation base 10a rotatably supported by a pivot 7 between the first and second members c and 2c, a grip operation portion 10b disposed substantially in front of the accelerator grip 5, and a handlebar therebetween. The operating base 10a and the operating base 10a are operated by the rider.
b, a mounting recess 10d for mounting the turning base 11b of the knocker 11 is formed on the upper surface of a turning base 10a formed in a rod-like body that gently curves forward of the accelerator grip 5. An insertion hole 10e of the pivot 7 is formed substantially at the center of the concave portion 10d, and a groove 1 is provided at a substantially intermediate position of the handlebar opposing surface of the grip operation portion 10b.
0f is formed in the thickness direction of the lever main body 10.

[0010] A padding is provided on the front side of the vehicle body with respect to the mounting recess 10d on the upper surface of the turning base 10a and a corresponding lower surface of the turning base 10a.
The reinforcing portions 10a and 10h are 0a. Reinforcing part 10
g and 10h are located outside the gripping operation part 10b which does not interfere with the lever brackets 2c, 2c which hold the gripping operation part 10b up and down when the lever body 10 is gripped, and the shape thereof is shown in FIG. As described above, the reinforcing portion 10g on the upper side of the rotating base 10a has a gentle taper shape that gradually increases in thickness from the inner side of the upper body of the mounting recess 10d toward the outer side of the upper body of the rotating base 10a, and the lower surface of the rotating base 10a is reinforced. The portions 10h are each formed in a gently inclined mountain shape.

The tapered reinforcing portion 10g and the chevron-shaped reinforcing portion 10h are set such that the highest portions thereof intersect the radial line passing through the center of the pivot 7 as much as possible in the tangential direction. With such a setting, the strength of the reinforcing portions 10g and 10h effectively acts on the turning base 10a.

The knocker 11 includes the working arm 11a disposed between the working arm opposing portion 10c of the lever body 10 and the rear end of the piston 8, and the rotating base 10a of the lever body 10.
A pivot base 11b held by the pivot 7 in the mounting concave portion 10d, and a stopper piece 11c extending from the pivot base 11b to the front side of the vehicle body of the cylinder body 2a. A pivot 7 is provided at the center of the rotation base 11b.
Is formed in the working arm 11a.
A bolt insertion hole 11e of the adjustment bolt 12 of the grip margin adjustment mechanism 9 is provided so as to open toward the working arm facing portion 10c.

The grip margin adjusting mechanism 9 is shown in detail in FIG.
As shown in the cross-sectional view of FIG. 5, the above-described adjustment bolt 12 which is hung over the working arm facing portion 10c of the lever body 10 and the working arm 11a of the knocker 11, and the working arm facing portion 10c
, A pivot shaft 13 rotatably supporting one end of the adjustment bolt 12, a support pin 14 rotatably supporting the other end of the adjustment bolt 12 with the operation arm 11a, an operation arm opposing portion 10c, and an operation. The operation dial 15 is screwed with the adjustment bolt 12 between the arm 11a.

The working arm facing portion 10c and the working arm 11a have
Bolt insertion holes 10i and 11e are formed so as to face each other, and the shaft hole 1 intersects with the bolt insertion hole 10i of the working arm opposing portion 10c.
0j, the rotation shaft 13 is rotatably mounted, and the pin hole 11f crosses the bolt insertion hole 11e of the working arm 11a.
A support pin 14 is fixed to the support pin 14. Adjustment bolt 1
Reference numeral 2 denotes a male screw 12a at one end, which is inserted into the working arm facing portion 10c and the bolt insertion holes 10i, 13a of the rotary shaft 13 so as to be rotatable together with the rotary shaft 13, and a mounting portion 12b at the other end. Is inserted into the bolt insertion hole 11e of the working arm 11a, and is pivotally supported by the support pin 14, and is supported rotatably around the support pin 14.

The operation dial 15 is provided with a working arm facing portion 10c.
The boss 15a is screwed to the male screw 12a of the adjusting bolt 12 between the arm 11a and the working arm 11a, and the end face of the boss 15a is brought into contact with the outer surface of the rotary shaft 13 to adjust the adjusting bolt 12a.
The adjusting bolt 12 is moved in the axial direction by rotating the large-diameter dial 15b.
The grip allowance between the grip operation unit 10b and the grip 5 is adjusted to expand and contract.

A return spring 16 is contracted between the tip of the pivot base 10a of the lever body 10 and the stopper piece 11c of the knocker 11.
The resilient force always urges the lever body 10 in the operating direction (clockwise direction in FIG. 1) to maintain the grip allowance between the grip operating portion 10b and the accelerator grip 5 at a set interval, and to operate. Arm opposing portion 10c, grip allowance adjusting mechanism 9, and working arm 1
Unnecessary spacing between 1a and piston 8 is filled.

In this embodiment constructed as described above, when the rider grips and operates the operating lever 3 during traveling of the bar-handled vehicle, the lever body 10 and the knocker 11 are integrated, and the operating direction is supported about the pivot 7 as a fulcrum. (Clockwise direction in Fig. 1)
And the working arm 11a of the knocker 11
Is pushed toward the bottom of the cylinder hole 2d to raise the pressure of the hydraulic fluid in the hydraulic chamber at the bottom of the cylinder hole, and the hydraulic fluid is supplied to the front brake to brake the front wheels.

If the bar handle vehicle falls down, for example, from a stand-mounted state in a bicycle parking lot, and an external force is applied to the operating lever 3, the external force is applied to the grip operating portion 10b at the longitudinal end of the operating lever 3 in the longitudinal direction. Grip end 10
k, and acts intensively as a bending load on the turning base 10a through the gripping operation portion 10b. In the turning base 10a, the reinforcing portions 10g and 10h, which are built up on the upper and lower surfaces as described above, are subjected to external force. The rotation base 10a is prevented from being damaged as much as possible.

For this reason, the external force acting on the lever body 10 is concentrated on the groove 10f, whose strength has been reduced by engraving on the grip operating portion 10b, because the strength of the rotating base 10a has been improved in this way. , And is bent by the groove 10f. As a result, the length from the rotation base 10a to the groove 10f of the gripping operation portion 10b is left on the lever body 10, so that the lever body 1 can be carried to a repair shop for repair.
The brake using the remaining part of 0 can be secured.

As described above, the present embodiment employs the rotating base 10a.
The strength of the rotating base 10a is improved by the two upper and lower reinforcing portions 10g and 10h which are built up on the outside of the lever body, so that the rotating base 10a can be prevented from being damaged by unexpected external force acting on the lever main body 10 as much as possible. become able to. Further, the external force transmitted to the rotation base 10a is applied to the lever bracket 2
c, 2c, the cylinder body 2a, etc.
These durability can be maintained well.

Since the upper and lower reinforcing portions 10g and 10h are located outside the lever holders 2c and 2c, the lever body 10 sandwiched between the lever holders 2c and 2c is provided.
Since the rotation base 10a has the same thickness as that of the conventional product, it can be widely applied to the conventional hydraulic master cylinder 2 having the lever holders 2c, 2c set at the same interval.

Further, in this embodiment, the upper and lower reinforcing portions 10g,
By setting the highest portion of 10h so as to intersect the tangential direction of the radial line passing through the center of the pivot 7 as much as possible, the strength of the reinforcing portions 10g and 10h effectively acts on the rotating base 10a receiving the bending load. Thus, damage to the rotating base 10a can be further prevented.

In the above-described embodiment, the operating lever is described as a two-piece type in which the operating lever is divided into a lever body and a knocker. However, the present invention is not limited to this. It may be an integrated operation lever directly provided.

In the above embodiment, the reinforcing portions are formed on both the upper surface and the lower surface of the rotating base. However, the reinforcing portions may be provided only on one of the upper and lower surfaces. The build-up shape of the reinforcing portion may be a shape other than the embodiment. Furthermore, in the above embodiment, the hydraulic master cylinder is also used, but the operating lever of the present invention can be applied to a type in which a wire cable connected to a brake or a clutch is directly pulled. In this case, a lever bracket is attached to the handlebar, and the operation lever is pivotally supported on the lever bracket.

[0025]

As described above, according to the present invention,
Since the strength of the turning base is enhanced by the reinforcing portion that is built up on the outside of the turning base, damage to the turning base can be prevented as much as possible by unexpected external force acting on the operation lever. Furthermore, from the improvement of the strength of the rotating base,
Since the external force transmitted to the rotation base of the operation lever is less likely to be transmitted to the cylinder body, the lever bracket, and the like of the hydraulic master cylinder, the durability of the cylinder body, the lever bracket, and the like can be maintained well.

Since the reinforcing portion of the rotating base is located outside the lever holder, the rotating base sandwiched between the lever holders has the same thickness as that of the conventional product. The present invention can be widely applied to a conventional hydraulic master cylinder having a holder.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a hydraulic master cylinder device showing an embodiment of the present invention.

2 is a view taken in the direction of arrows II-II in FIG. 4;

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 2;

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a sectional view taken along line VV of FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Handlebar, 2 ... Hydraulic master cylinder, 2a ... Cylinder body, 2c ... Lever bracket, 2d ... Cylinder hole, 3 ... Operating lever, 4 ... Hydraulic master cylinder device,
Reference Signs List 8: piston, 10: lever body, 10b: grip operation section, 10g, 10h: reinforcement section, 9: grip margin adjustment mechanism, 1
1 ... Knocker

Claims (2)

[Claims] 1. A brake base comprising: a lever bracket rotatably supported on a lever bracket at a vehicle body front side of a handlebar; and a grip operation section disposed at a vehicle body front side of a handlebar end grip. In a bar handle vehicle operating lever for operating a hydraulic master cylinder, a wire cable, or the like connected to a clutch or a clutch, a position outside the lever bracket on one or both of the upper surface and the lower surface of the turning base is overlaid. An operating lever for a bar handle vehicle, wherein the operating lever is a reinforcing portion. 2. The operating lever for a bar handle vehicle according to claim 1, wherein a groove for breaking is provided on a grip-facing surface of the grip operating portion.