JP6993174B2 - Hydraulic master cylinder device for bar handle vehicles - Google Patents

Description

The present invention relates to a hydraulic master cylinder device for a bar handle vehicle, and more particularly to a hydraulic master cylinder device for a bar handle vehicle capable of changing the operation feeling of an operation lever.

Conventionally, a hydraulic master cylinder device for a bar handle vehicle has a hydraulic master cylinder, an operation lever rotatably pivotally attached to the cylinder body of the hydraulic master cylinder around a pivot, and the operation lever and the hydraulic master. Some were equipped with a push rod interposed between the cylinder and the piston. In such a hydraulic master cylinder for a bar handle vehicle, the operating lever is provided with an adjust bolt that supports the rear end of the push rod and allows the angle of the push rod to be changed with respect to the piston, and the operating lever can be moved from the center of the pivot. The lever ratio, which is the ratio between the distance to the push rod contact point that comes into contact with the push rod and the distance from the center of the pivot to the operation point where the driver grips and operates the operation lever, is appropriately changed to provide the desired operation fee. There was one that made it possible to obtain a ring (see, for example, Patent Document 1).

Jitsufuku No. 4-1034 Gazette

However, in the above-mentioned Patent Document 1, a stopper convex portion for preventing the rotation of the adjust bolt is provided on the operation lever side, and when the lever ratio is changed, the elastic force of the spring member is resisted. The operability was not good because the adjust bolt had to be pulled forward to disengage the engagement between the adjust bolt and the protrusion of the stopper, and then the adjust bolt had to be operated to change the lever ratio.

Therefore, an object of the present invention is to provide a hydraulic master cylinder device for a bar handle vehicle that can change the operation feeling of an operation lever with a simple operation.

In order to achieve the above object, the hydraulic master cylinder device for a bar handle vehicle of the present invention rotates around a pivot in a hydraulic master cylinder in which a piston is inserted in a cylinder hole and a cylinder body of the hydraulic master cylinder. In a bar handle vehicle hydraulic master cylinder device comprising an operating lever that is possibly pivotally attached and a push rod interposed between the operating lever and the piston of the hydraulic master cylinder, the operating lever is , The rotating base through which the pivot is inserted, the lever portion extending from the rotating base to the outside of the vehicle body and having a grip portion, and the lever from the rotating base along the inner surface of the cylinder body. The push rod is provided with an adjusting member mounting arm projecting in a direction intersecting the portion, and the slide member is slidably supported in the longitudinal direction of the lever portion on the facing surface of the lever portion facing the cylinder hole. The base end is swingably connected to the piston and the tip is swingably connected to the slide member, so that the adjust member mounting arm projects from the surface of the adjust member mounting arm on the cylinder body side and the amount of protrusion can be adjusted. The lever ratio adjusting member is attached, and the slide member is connected to the protruding end of the lever ratio adjusting member.

Further, an invalid stroke adjusting member is attached to the adjusting member mounting arm so that the adjusting member mounting arm can protrude from the surface of the adjusting member mounting arm on the cylinder body side , the tip of the adjusting member abuts on the cylinder body, and the protrusion amount can be adjusted. Is suitable.

Further, the operating lever is formed by being divided into a lever body and a knocker, the lever body is provided with the grip portion, and the knocker is provided with an acting arm that slidably supports the rotating base portion and the slide member. And the adjusting member mounting arm may be provided, and the lever body may be connected to the tip of the working arm.

According to the hydraulic master cylinder device for a bar handle vehicle of the present invention, a slide member to which a push rod is connected is slidably provided on the facing surface of the cylinder body of the operation lever facing the cylinder hole, and the adjustment member of the operation lever is attached. By sliding the slide member by operating the lever ratio adjust member attached to the arm, the lever ratio can be easily adjusted.

In addition, the invalid stroke adjust member that projects from the cylinder body side surface of the adjust member mounting arm to the adjust member mounting arm of the operation lever and abuts on the cylinder body, and the amount of protrusion from the cylinder body side surface can be adjusted. By installing, it is possible to adjust the stroke amount of the invalid stroke that does not generate hydraulic pressure from the start of operation of the operation lever with a simple operation. Further, since the invalid stroke adjusting member and the lever ratio adjusting member can be operated from the same direction, the operability can be improved.

Further, the operating lever is divided into a lever body and a knocker, and the lever body is provided with a grip portion, and the knocker is provided with a rotation base, an acting arm having a slide groove, and an adjusting member mounting arm. By connecting the lever body to the tip, when an unexpected load is applied to the lever body of the operating lever for some reason, the impact load is transmitted to parts other than the operating lever such as the hydraulic master cylinder and lever bracket. It can be difficult. Further, by forming the operating lever separately into the lever body and the knocker, the slide member can be easily assembled to the knocker before the lever body is assembled, and the assembling property can be improved.

It is sectional drawing of the main part of the hydraulic pressure master cylinder apparatus for a bar handle vehicle which shows an example of one embodiment of this invention. Similarly, it is a front view of the hydraulic pressure master cylinder device for a bar handle vehicle. FIG. 2 is a sectional view taken along line III-III of FIG. FIG. 2 is a sectional view taken along line IV-IV of FIG. It is an exploded perspective view of the hydraulic pressure master cylinder apparatus for a bar handle vehicle which shows an example of one embodiment of this invention. Similarly, it is a cross-sectional view of a main part of a hydraulic pressure master cylinder device for a bar handle vehicle when the lever ratio is adjusted. Similarly, it is a cross-sectional view of a main part of a hydraulic pressure master cylinder device for a bar handle vehicle when the invalid stroke of the piston is adjusted. Similarly, it is a cross-sectional view of a main part of the hydraulic pressure master cylinder when the invalid stroke of the piston is adjusted.

1 to 8 are views showing an example of a form of the hydraulic pressure master cylinder device for a bar handle vehicle of the present invention. The hydraulic master cylinder device 1 is between a hydraulic master cylinder 3 attached to a handlebar 2 for steering a front wheel (not shown) at the front of the vehicle body, an operation lever 4 attached to the hydraulic master cylinder 3, and the like. It is equipped with a push rod 5 interposed therein.

The hydraulic master cylinder 3 holds the handlebar 2 with a mounting bracket 3b integrally formed with the cylinder body 3a and a holder 6, and fastens these with bolts 7 to the front side of the vehicle body of the handlebar 2. Be placed. A bottomed cylinder hole 3c is provided in the cylinder body 3a with an opening on the front side of the vehicle body, and the piston 8 is inserted into the cylinder hole 3c with the primary cup 9a and the secondary cup 9b externally fitted. A hydraulic chamber 10 is defined between the piston 8 and the cylinder hole 3c. A return spring 11 is contracted between the bottom wall of the cylinder hole 3c and the piston 8, and the piston 8 is constantly urged toward the opening of the cylinder hole 3c by the elastic force of the return spring 11.

A relief port 12 and a supply port 13 are provided on the side wall of the cylinder body 3a so as to communicate with the cylinder hole 3c, and the relief port 12 and the supply port 13 have a connector connected to a reservoir (not shown). It is provided so that the hydraulic fluid can flow between the cylinder hole 3c and the reservoir. Further, a pair of upper and lower lever holders 3d and 3d are projected from the front end of the cylinder body 3a at predetermined intervals, and an operation lever 4 is provided on the lever holders 3d and 3d via a collar 14 and a pivot 15. It is rotatably attached to the shaft.

The operating lever 4 is arranged in front of the vehicle body of the accelerator grip 16 and includes a lever body 4b provided with a grip portion 4a and a knocker 4c for pushing the push rod 5. The lever body 4b and the knocker 4c are connected to a connecting bolt 17 It is connected by. The knocker 4c has a rotation base 4e provided with an insertion hole 4d for inserting the collar 14 into which the pivot 15 is inserted, and extends from the rotation base 4e to the outside of the vehicle body through the front side of the cylinder hole opening. A working arm 4f that connects the lever body 4b to the tip portion, and an adjusting member mounting arm 4g that protrudes from the rotating base 4e along the inner surface of the cylinder body 3a in a direction intersecting the working arm 4f. There is.

In the working arm 4f, a slide groove 4h is extended in the longitudinal direction of the working arm 4f on the facing surface facing the cylinder hole 3c, and the slide member 4i is slidably supported by the slide groove 4h. The adjusting member mounting arm 4g is formed on the front side of the vehicle body in the inside / outside direction of the vehicle body and has a first insertion hole 4j having an inclination substantially the same as the inclination of the slide groove 4h, and a lever is formed in the first insertion hole 4j. The ratio adjusting member 18 is inserted and penetrates in the vehicle body rearward side in the vehicle body inside / outside direction, and at the time of initial setting, a second insertion hole 4k orthogonal to the axis of the cylinder hole 3c is formed in the second insertion hole 4k. The invalid stroke adjusting member 19 is inserted.

The lever ratio adjusting member 18 has a cylindrical shape having a spherical connecting portion 18a connected to the slide member 4i at one end (the tip of the protruding side of the present invention) and a large-diameter rotation operating portion 18b at the other end. It includes a first rod member 18c and a first ball plunger 18e arranged in a direction intersecting the first rod member 18c and having a ball 18d urged by an urging means. In the first rod member 18c, two engaging grooves 18f are formed on the outer peripheral surfaces at different positions in the axial direction, and the ball 18d of the first ball plunger 18e is engaged with any of the engaging grooves 18f. The amount of protrusion of the adjusting member mounting arm 4g from the surface on the cylinder body side is adjusted.

The invalid stroke adjusting member 19 includes a cylindrical second rod member 19c having a hemispherical contact portion 19a that abuts on the cylinder body 3a at one end and a large-diameter rotation operation portion 19b at the other end. It is provided with a second ball plunger 19e, which is arranged in a direction intersecting the second rod member 19c and includes a ball 19d urged by urging means. The second rod member 19c is provided with two engaging grooves 19f on the outer peripheral surfaces at different positions in the axial direction, and the ball 19d of the second ball plunger 19e is engaged with any of the engaging grooves 19f. The amount of protrusion of the adjusting member mounting arm 4g from the surface on the cylinder body side is adjusted.

The slide member 4i has a hemispherical recess 4m that swingably connects the connecting portion 18a of the first rod member 18c to the inside of the vehicle body and swingably connects the tip portion 5a of the push rod 5 to the cylinder body side. 4n is formed. The push rod 5 has the tip portion 5a and the proximal end portion 5b formed in a hemispherical shape, respectively, and the proximal end portion 5b is formed on the hemispherical engaging portion 8a formed at the end portion of the piston 8 and the tip portion 5a is attached to the hemispherical engaging portion 8a. Is swingably connected to the hemispherical recesses 4n of the slide member 4i. Further, a dust boot 20 is arranged between the intermediate portion of the push rod 5 and the opening of the cylinder hole.

In this embodiment, as shown in FIG. 1, in the initial setting, the lever ratio adjusting member 18 engages with the engaging groove 18f inside the vehicle body of the first rod member 18c and the ball 18d of the first ball plunger 18e. The slide member 4i is arranged inside the vehicle body of the slide groove 4h. Further, the invalid stroke adjusting member 19 is fixed by engaging the engaging groove 19f inside the vehicle body of the second rod member 19c with the ball 19d of the second ball plunger 19e, and the adjusting member mounting arm 4g and the cylinder body 3a are fixed. It is in a state of being in contact with the inner surface of the vehicle body. As a result, as shown in FIG. 4, when the piston 8 of the hydraulic master cylinder 3 is located at the retracting limit in the non-operating state, the primary cup 9a of the piston 8 opens the cylinder hole more than the relief port 12. It is arranged on the portion side, and a predetermined invalid stroke S1 is set between the primary cup 9a and the relief port 12.

When it is desired to reduce the lever ratio from such an initial setting to change the operation feeling, as shown in FIG. 6, the rotation operation portion 18b of the lever ratio adjusting member 18 is pushed to the outside of the vehicle body while being rotated. The engaging groove 18f on the outside of the vehicle body of the first rod member 18c is engaged with the ball 18d of the first ball plunger 18e, and the slide member 4i is slid to the outside of the vehicle body. As a result, the driver grips and operates the distance L1 from the center C1 of the pivot 15 to the push rod contact point P1 where the slide member 4i abuts on the push rod 5, and the grip portion 4a of the operation lever 4 from the center of the pivot 15. The ratio to the distance L2 to the operation point P2 becomes smaller than that at the time of initial setting, and the operation feeling can be changed.

Further, when it is desired to reduce the invalid stroke of the piston 8 from the initial setting and reduce the stroke amount from the start of operation of the operation lever 4 to the generation of hydraulic pressure, as shown in FIG. 7 , the invalid stroke adjusting member 19 The rotation operation unit 19b is pushed to the outside of the vehicle body while being rotated, and the engaging groove 19f on the outside of the vehicle body of the second rod member 19c is engaged with the ball 19d of the second ball plunger 19e. As a result, the contact portion 19a of the second rod member 19c protrudes from the surface of the adjusting member mounting arm 4g on the cylinder body side , the knocker 4c rotates about the pivot 15, and the acting arm 4f moves toward the cylinder body side. By approaching, the piston 8 is slightly pushed into the cylinder hole, and in the non-operating state, the invalid stroke S2 set between the primary cup 9 and the relief port 12 is reduced to change the operation feeling. be able to.

In this embodiment, as described above, the lever ratio can be adjusted and the invalid stroke can be adjusted by rotating the rotation operation unit 18b of the lever ratio adjusting member 18 and the rotation operation unit 19b of the invalid stroke adjusting member 19. It can be done easily. Further, the lever ratio adjusting member 18 is fixed by engaging the ball 18d of the first ball plunger 18e with any of the engaging grooves 18f formed in the first rod member 18c, and the invalid stroke adjusting member 19 is fixed to the first. Since the ball 19d of the second ball plunger 19e is engaged and fixed to any of the engaging grooves 19f formed in the two rod members 19c, the lever ratio and the invalid stroke can be adjusted in multiple stages. , Can be performed reliably, and operability can be improved.

Further, the operating lever 4 is formed by being divided into a lever body 4b and a knocker 4c, and the lever body 4b has a grip portion 4a, the knocker 4c has a rotation base 4e, an acting arm 4f having a slide groove 4h, and an adjusting member. When a mounting arm 4g is provided and the lever body 4b is connected to the tip of the working arm 4f via a connecting bolt 17, an unexpected load is applied to the lever body 4b of the operating lever 4 for some reason. It is possible to make it difficult to transmit the impact load to parts other than the operating lever such as the hydraulic master cylinder 3 and the lever holder 3d.

The present invention is not limited to the two-piece type operation lever consisting of the lever body and the knocker as in the above-described embodiment, but includes an integrated operation lever having the knocker integrally provided with the lever body. It can also be applied to a hydraulic master cylinder device. Further, the engagement groove formed on the lever ratio adjusting member and the engaging groove formed on the invalid stroke adjusting member are not limited to two, and may be provided by three or more. Further, a slide groove may be provided on the slide member side to slidably support the slide member on the facing surface facing the cylinder hole of the operation lever.

1 ... Hydraulic master cylinder device, 2 ... Handlebar, 3 ... Hydraulic master cylinder, 3a ... Cylinder body, 3b ... Mounting bracket, 3c ... Cylinder hole, 3d ... Lever holder, 3e ... Car body inner surface, 4 ... Operation lever 4, 4a ... grip part, 4b ... lever body, 4c ... knocker, 4d ... insertion hole, 4e ... rotation base, 4f ... working arm, 4g ... adjust member mounting arm, 4h ... slide groove, 4i ... slide member, 4j ... 1st insertion hole, 4k ... 2nd insertion hole, 4m ... Spherical recess, 4n ... Hemispherical recess, 5 ... Push rod, 5a ... Tip, 5b ... Base end, 6 ... Holder, 7 ... Bolt, 8 ... Piston , 8a ... hemispherical engaging part, 9a ... primary cup, 9b ... secondary cup, 10 ... hydraulic chamber, 11 ... return spring, 12 ... relief port, 13 ... supply port, 14 ... color, 15 ... pivot, 16 ... Accelerator grip, 17 ... connecting bolt, 18 ... lever ratio adjusting member, 18a ... connecting part, 18b ... rotating operation part, 18c ... first rod member, 18d ... ball, 18e ... first ball plunger, 18f ... engaging groove , 19 ... Invalid stroke adjust member, 19a ... Contact part, 19b ... Rotation operation part, 19c ... Second rod member, 19d ... Ball, 19e ... Second ball plunger, 19f ... Engagement groove, 20 ... Dust boots

Claims (3)

A hydraulic master cylinder with a piston inserted in the cylinder hole, an operating lever rotatably pivoted around a pivot to the cylinder body of the hydraulic master cylinder, and a piston of the operating lever and the hydraulic master cylinder. In a bar handle vehicle hydraulic master cylinder device with a push rod interposed between and
The operating lever has a rotation base through which the pivot is inserted, a lever portion extending from the rotation base to the outside of the vehicle body and having a grip portion, and the rotation base along the inner surface of the vehicle body of the cylinder body. The lever portion is provided with an adjusting member mounting arm that protrudes in a direction intersecting the lever portion.
A slide member is slidably supported in the longitudinal direction of the lever portion on the facing surface of the lever portion facing the cylinder hole.
The push rod is swingably connected to the piston at the base end and to the slide member at the tip.
A lever ratio adjusting member that protrudes from the surface of the adjusting member mounting arm on the cylinder body side and can adjust the amount of protrusion is attached to the adjusting member mounting arm, and the lever ratio adjusting member is attached to the protruding end of the lever ratio adjusting member. A bar handle vehicle hydraulic master cylinder device characterized by connecting slide members. It is determined that the adjusting member mounting arm is attached with an invalid stroke adjusting member that can protrude from the surface of the adjusting member mounting arm on the cylinder body side , the tip of the adjusting member abuts on the cylinder body, and the protrusion amount can be adjusted. The hydraulic master cylinder device for a bar handle vehicle according to claim 1, wherein the hydraulic master cylinder device is characterized. The operating lever is formed by being divided into a lever main body and a knocker, the lever main body is provided with the grip portion, and the knocker has a rotating base portion and an acting arm that slidably supports the slide member. The hydraulic master cylinder device for a bar handle vehicle according to claim 1 or 2, wherein the adjusting member mounting arm is provided, and the lever body is connected to the tip end portion of the working arm.

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