JP3934087B2 - Bar handle vehicle control lever - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is applied to various bar handle vehicles such as motorcycles, motor tricycles, three- and four-wheel buggy vehicles, snowmobiles, and the like having a steering handlebar at the front of the vehicle body. The present invention relates to a bar handle vehicle operating lever such as a brake lever or a clutch lever that generates hydraulic pressure in a master cylinder and hydraulically operates a brake or a clutch.
[0002]
[Prior art]
In a hydraulic master cylinder for a bar handle vehicle, an operation lever attached to the hydraulic master cylinder is inserted into a lever body disposed in front of the grip at the end of the handlebar and the hydraulic master cylinder. There is one divided into two pieces with a knocker that pushes the formed piston.
[0003]
This operating lever has a pivot base of the lever body formed in a bifurcated shape having an upper arm and a lower arm to form a knocker insertion portion, and a knocker is inserted into the knocker insertion portion between both rotation base portions of the upper arm and the lower arm. With the rotation base of the knocker sandwiched between them, it is inserted between a pair of upper and lower lever holders extending on the cylinder body of the hydraulic master cylinder, and both rotation bases are connected to the lever holder by a single pivot. It is pivotably supported (for example, refer to Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-180559
[Problems to be solved by the invention]
Since the operation lever is generally formed by casting, it is necessary to set a draft angle for removing the mold on the opposing surfaces of the upper arm and the lower arm provided on the rotation base of the lever body. is there. Therefore, the dimension between the opposing surfaces of the upper arm and the lower arm is smaller in the depth than the dimension on the opening side, and becomes wider toward the opening side. On the other hand, the vertical dimension (thickness) of the knocker is designed with the upper and lower surfaces parallel to each other, corresponding to the minimum dimension between the opposing surfaces of the upper and lower arms where the knocker is inserted, that is, This is a disadvantage in terms of strength. In addition, if the entire knocker is made thicker to increase the strength of the knocker, not only the shape of the lever body but also the operating lever mounting part of the hydraulic master cylinder will be affected, resulting in an increase in weight and cost. It becomes.
[0006]
Therefore, an object of the present invention is to provide a bar handle vehicle operating lever having a structure that can improve the strength of the knocker and can perform the pushing operation of the piston more reliably in a stable state.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the bar handle vehicle operating lever of the present invention, the operating lever attached to the pair of upper and lower lever holders extended to the hydraulic master cylinder is arranged in front of the grip at the end of the handle bar. It is divided into a cast lever body and a knocker that pushes a piston inserted in the hydraulic master cylinder, and the pivot base of the lever body is formed in a bifurcated shape having an upper arm and a lower arm. and, between the upper arm and lower arm of the pivoting base of the knocker and clamping free knocker insertion portion, insert the rotation base of the upper arm and the lower arm between the pair of levers holders, said with the lever holder by inserting the pivot and both rotation base, in the lever main body and the knocker and a bar handle vehicle operation lever that is pivotally supported, said hydraulic master cylinder, perpendicular to the handlebar Is a vertically placed master cylinder that pushes the piston into the bottom side of the bottomed cylinder hole by the operation of the operation lever, and the opposing surfaces of the upper arm and the lower arm sandwiching the knocker insertion portion are The draft angle of the mold is provided, and the shape is such that it extends in the vertical direction from the back of the knocker insertion portion toward the opening on the rear side of the vehicle body , and the upper surface and the lower surface of the knocker are inserted into the knocker. It has a tapered surface corresponding to the draft angle of the mold provided on the opposing surfaces of the upper arm and the lower arm of the lever body, and when the knocker is inserted into the knocker insertion portion, the upper surface of the knocker is the upper arm of the upper arm The lower surface and the lower surface of the knocker are set substantially parallel to the upper surface of the lower arm, respectively, and the vehicle body rear side of the knocker is formed thicker than the vehicle body front side. Between the vehicle body rear side of the piston of the hydraulic master cylinder, a push rod for pushing said piston is characterized in that it is interposed.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
1 to 5 show an embodiment in which the bar handle vehicle operating lever of the present invention is applied to a front brake hydraulic master cylinder device for a bar handle vehicle. FIG. 1 shows a lever main body and a knocker in the operating lever. FIG. 2 is a sectional view taken along the line II-II of FIG. 4, FIG. 3 is a sectional plan view of a hydraulic master cylinder device equipped with the bar handle vehicle operating lever of the present invention, and FIG. 4 is a plan view showing a state in which the hydraulic master cylinder device equipped with the bar handle vehicle operating lever of the present invention is attached to the handle bar, and FIG. 5 is a cross-sectional view taken along the line VV of FIG.
[0009]
First, the hydraulic master cylinder device 1 includes a hydraulic master cylinder 3 attached to a handlebar 2 that steers a front wheel (not shown) at the front of the vehicle body, and an operation lever 4 attached to the hydraulic master cylinder 3. And a push rod 5 interposed between them.
[0010]
The hydraulic master cylinder 3 has a cylinder body 6 disposed in a direction perpendicular to the handlebar 2 with a bottomed cylinder hole 7 opened to the front side of the vehicle body, and a piston 8 inside the cylinder hole 7. A vertically-mounted master cylinder that is inserted and includes a bracket half 6a integrated with the cylinder body 6 and a separate half-bracket 9 in the vicinity of the accelerator grip 10 at the end of the handlebar. Fastened with bolts 11, 11 and attached to the front side of the vehicle body of the handlebar 2.
[0011]
The above-described piston 8 is inserted into the cylinder hole 7 in a liquid-tight and movable manner using a primary cup 12 a and a secondary cup 12 b, and a hydraulic chamber is provided between the piston 8 and the bottom wall of the cylinder hole 7. 13 is defined. A return spring 14 is contracted between the bottom wall of the cylinder hole 7 and the piston 8, and the piston 8 is constantly urged toward the opening of the cylinder hole 7 by the elastic force of the return spring 14. . The backward limit when the piston 8 is not operated is regulated by the push rod 5.
[0012]
A relief port 15 and a supply port 16 are provided on the upper wall of the cylinder body 6 so as to communicate with the cylinder hole 7. Both ports 15 and 16 are connected to a reservoir (not shown) from the connector 17 via a hose so that hydraulic fluid flows between the cylinder hole 7 and the reservoir. At the front end of the cylinder body 6, a pair of upper and lower lever holders 6b, 6b are projected with a predetermined gap, and the operation lever 4 uses a collar 20 and a pivot 21 for the lever holders 6b, 6b. And is pivotally mounted. The pivot 21 includes a screw portion 21b below the shaft portion 21a. The upper lever holder 6b is screwed with the insertion hole 6c of the shaft portion 21a, and the lower lever holder 6b is screwed with the male screw portion 21b. Screw holes 6d are respectively formed.
[0013]
The operation lever 4 is a two-piece type divided into a cast lever main body 22 disposed in front of the accelerator grip 10 and a knocker 23 that pushes the push rod 5. The grip allowance adjusting mechanism 24 is provided between the two. The lever body 22 includes a pivot base portion 22a pivotally supported between the lever holders 6b and 6b by the pivot 21, a grip operation portion 22b disposed substantially along the front side of the vehicle body of the accelerator grip 10, and And a recess 22c for disposing the grip allowance adjusting mechanism 24. In addition, in the middle position of the grip facing surface in the grip operation portion 22b, when a large impact load is applied to the lever main body 22, a notch for concentrating the impact load to break the lever main body 22 at the intermediate position. The portion 22d is provided in a direction crossing the longitudinal direction of the lever body.
[0014]
The pivot base 22a is formed in a U-shaped cross section with the rear side of the vehicle body opened by a plate-like upper arm 22e and lower arm 22f that are spaced apart in a bifurcated manner and a side plate 22g that connects these vehicle body front sides. The upper arm 22e, the lower arm 22f, and the side plate 22g define a knocker insertion portion 22h. Further, insertion holes 22i and 22i for inserting the pivot 21 are formed in the upper and lower arms 22e and 22f on the same axis.
[0015]
The opposing surfaces of the upper arm 22e and the lower arm 22f are provided with a draft angle for extracting the mold after the formation of the knocker insertion portion 22h from this portion, and the rear portion (vehicle body front side) of the knocker insertion portion 22h is provided. The shape expands in the vertical direction from the side plate 22g portion toward the opening on the rear side of the vehicle body.
[0016]
On the other hand, the knocker 23 is inserted in the knocker insertion portion 22h of the lever main body 22 and is sandwiched between the upper arm 22e and the lower arm 22f, and is rotated by being pivotally supported by the pivot 21. A moving base 23a, a working arm 23b extending from the rotating base 23a toward the lever body tip side, and a pair of stopper pieces 23c, 23c for regulating the amount of rotation of the knocker 23 are provided.
[0017]
The upper surface 23d and the lower surface 23e of the knocker 23 are tapered surfaces having an angle α corresponding to the draft provided on the opposing surfaces of the upper arm 22e and the lower arm 22f of the lever body 22. That is, when the knocker 23 is inserted into the knocker insertion portion 22h, the upper surface 23d of the knocker 23 is set to be substantially parallel to the lower surface of the upper arm 22e, and the lower surface 23e of the knocker 23 is set to be substantially parallel to the upper surface of the lower arm 22f. In addition, the rear side of the knocker 23 is thicker than the front side of the vehicle by a thickness t.
[0018]
An insertion hole 23f for inserting the pivot 21 through the collar 20 is formed in the rotation base 23a. Further, the working arm 23 b is provided with an adjustment cam contact surface 23 g facing the recess 22 c of the lever main body 22 and a circular boss hole 23 h facing the opening of the cylinder hole 7. The boss hole 23h, cylindrical bridge member 25 is mounted rotatably, the該駒member 25, the mounting hole 25a for mounting a push rod 5 is recessed.
[0019]
The grip allowance adjusting mechanism 24 includes an adjustment pin 26 having a cam shaft portion 26a inserted into the concave portion 22c of the lever main body 22 and an operation dial 26b disposed on the upper surface of the lever main body 22, and the cam shaft portion 26a. Are provided with a plurality of cam surfaces 26c set at unequal distances from the central axis. This grip allowance adjusting mechanism 24 is operated by rotating the operation dial 26b to selectively abut one cam surface of the plurality of cam surfaces 26c on the adjusting cam abutting surface 23g of the knocker 23. The grip allowance set between the grip operation unit 22b of the main body 22 and the accelerator grip 10 can be adjusted to be enlarged or reduced.
[0020]
Further, a spring 28 is contracted between the stopper piece 23c on the lever main body side and the tip 22j of the rotation base 22a of the lever main body 22, and a cam surface 26c that contacts the adjusting cam contact surface 23g is provided. Even if it is selected arbitrarily, the cam surface 26c is always in pressure contact with the adjusting cam contact surface 23g by the resilient force of the spring 28, so that rattling of the lever body 22 is suppressed.
[0021]
Before the lever body 22 and the knocker 23 are attached to the lever holders 6b and 6b, the rotation base of the knocker 23 is inserted into the knocker insertion portion 22h between the upper arm 22e and the lower arm 22f of the rotation base 22a of the lever body 22. 23a is inserted, the insertion holes 22i, 22i, and 23f of both the rotation base portions 22a and 23a are aligned, and the collar 20 is inserted, whereby the operation lever 4 is temporarily assembled. In this state, both the rotation bases 22a and 23a are inserted between the lever holders 6b and 6b, and the collar 20 is aligned with the insertion hole 6c and the female screw hole 6d of the lever holders 6b and 6b. The portion 21a is inserted from the upper lever holder 6b side, the male screw portion 21b of the pivot 21 is screwed into the female screw hole 6d, and the nut 29 is screwed onto the male screw portion 21b protruding from the lower surface of the lower lever holder 6b. As a result, the lever main body 22 and the knocker 23 are pivotally supported around the pivot 21.
[0022]
The push rod 5 described above is interposed between the operating lever 4 and the piston 8 of the hydraulic master cylinder 3 thus mounted. The push rod 5 has a spherical portion 5b at the tip of the shaft portion 5a. The spherical portion 5b is rotatably engaged with a hemispherical engagement hole 8a formed at the rear end of the piston 8, The shaft portion 5a is inserted into the attachment hole 25a of the piece member 25 attached to the knocker 23 and attached.
[0023]
In this way, the elastic force of the return spring 14 inside the hydraulic chamber 13 is always applied to the operation lever 4 mounted on the hydraulic master cylinder 3 through the piston 8 and the push rod 5, and when the operation lever 4 is not operated. Is set by the contact between the stopper piece 23c of the knocker 23 and one side wall of the cylinder body 6 and the cam surface 26c selected by the grip allowance adjusting mechanism 24, and the grip operating portion 22b of the lever body 22 and the accelerator grip 10 are A predetermined hand allowance is formed between them.
[0024]
When the rider grips and operates the operation lever 4 while the bar handle vehicle is traveling, the lever main body 22 and the knocker 23 are rotated together with the pivot 21 as a fulcrum in the operation direction (accelerator grip 10 direction). The action arm 23 b pushes the push rod 5 through the piece member 25, and the push rod 5 pushes the piston 8 toward the bottom of the cylinder hole 7. As a result, the hydraulic fluid in the hydraulic pressure chamber 13 is boosted and supplied to the front brake, so that the front wheel is braked.
[0025]
The operating force of the rider is transmitted from the lever body 22 to the working arm 23b of the knocker 23 through the adjustment pin 26 of the grip adjustment mechanism 24, and from the knocker 23 to the piston 8 through the piece member 25 and the push rod 5. Communicated. At this time, since the upper surface 23d and the lower surface 23e of the knocker 23 are tapered surfaces and the rear side of the vehicle body is thicker than the front side of the vehicle body , the strength is improved, so that the operating force can be transmitted more reliably. . Further, since there is no gap between the open end of the knocker insertion portion 22h of the lever main body 22 and the upper and lower surfaces of the knocker 23, the appearance is improved. Furthermore, it is possible to further improve the strength of the peripheral portion of the boss hole 23h for mounting the frame member 25 you push the piston 8 through the push rod 5.
[0027]
【The invention's effect】
As described above, according to the bar handle vehicle operating lever of the present invention, it is possible to improve the knocker strength while minimizing an increase in weight and cost, and in a state where the pushing operation of the piston is stable. This can be done more reliably.
[Brief description of the drawings]
FIG. 1 is a cross-sectional side view of a main part showing a relationship between a lever body and a knocker in an operation lever.
2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is a cross-sectional plan view of a hydraulic master cylinder device equipped with the bar handle vehicle operating lever of the present invention.
FIG. 4 is a plan view showing a state in which a hydraulic master cylinder device equipped with the bar handle vehicle operating lever of the present invention is attached to the handle bar.
FIG. 5 is a cross-sectional view taken along the line VV in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Hydraulic master cylinder apparatus, 2 ... Handlebar, 3 ... Hydraulic master cylinder, 4 ... Operation lever, 5 ... Push rod, 6 ... Cylinder body, 7 ... Cylinder hole, 8 ... Piston, 13 ... Hydraulic chamber, 22 ... Lever body, 22a ... Rotation base, 22b ... Grip operation part, 22e ... Upper arm, 22f ... Lower arm, 22g ... Side plate, 22h ... Knocker insertion part, 23 ... Knocker, 23a ... Rotation base, 23d ... Upper surface, 23e ... lower surface, 24 ... grip adjustment mechanism, 25 ... piece member, 26 ... adjustment pin, α ... angle corresponding to draft angle provided on the opposing surfaces of the upper and lower arms of the lever body

Claims (1)

An operation lever attached to a pair of upper and lower lever holders extended to the hydraulic master cylinder is inserted into a cast lever body disposed in front of the grip at the end of the handlebar and the hydraulic master cylinder. is divided into a knocker to push the pistons, the rotation base of the lever main body is formed in a bifurcated shape with a upper arm and lower arm, a rotation base of the knocker between the upper arm and lower arm a clamping-free knocker insertion portion, the upper arm and the rotation base of the lower arm insertion between the pair of levers holders, by inserting the pivot to the pivot base of the both with the lever holder, the lever main body and the knocker in bar handle vehicle operating lever pivotally supported the door pivotably, said hydraulic master cylinder, the disposed handlebar perpendicular direction, with a bottom of said piston by operation of the operating lever A vertical-type master cylinder that is pushed into the bottom side of the Linda hole, and the opposing surfaces of the upper arm and the lower arm sandwiching the knocker insertion portion are provided with a draft angle of the mold, and the vehicle body extends from the back of the knocker insertion portion. The upper and lower surfaces of the knocker are shaped so as to expand in the vertical direction toward the opening on the rear side , and the molds provided on the opposing surfaces of the upper arm and lower arm of the lever body into which the knocker is inserted When the knocker is inserted into the knocker insertion portion, the upper surface of the knocker is substantially parallel to the lower surface of the upper arm, and the lower surface of the knocker is substantially parallel to the upper surface of the lower arm. The knocker body rear side is formed thicker than the vehicle body front side, and the knocker body rear side and the piston of the hydraulic master cylinder are interposed between the pistons. Bar handle vehicle operating lever push rod for pushing tons is characterized in that it is interposed.

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