JP6934841B2 - 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 that supplies hydraulic pressure to a clutch or brake of a bar handle vehicle such as a motorcycle. The present invention relates to a hydraulic master cylinder device for a bar handle vehicle provided with a spring member for urging in the direction of action.

Conventionally, as a hydraulic master cylinder device for a bar handle vehicle, a spring member for urging the operation lever in the action direction is provided between the operation lever and the cylinder body to prevent the operation lever from rattling (. For example, see Patent Document 1.).

Japanese Patent No. 2617254

However, in the above-mentioned Patent Document 1, since the spring member is assembled in a straight line, there is a risk of unexpected buckling when the operation is released, and since the buckling direction is not constant, the spring member is not constant during operation. The posture of the spring member was sometimes unstable. Further, in the hydraulic master cylinder device for a clutch in which the operating lever is often made to make a full stroke, when the posture of the spring member becomes unstable due to buckling, the durability of the spring is lowered and the maintainability is not good. ..

Therefore, according to the present invention, it is possible to suppress buckling of the spring member that urges the operating lever in the direction of action, stabilize the posture of the spring member during operation, and improve the durability of the spring member. It is an object of the present invention to provide a hydraulic master cylinder device for a bar handle vehicle capable of performing.

In order to achieve the above object, the hydraulic master cylinder device for a bar handle vehicle of the present invention is provided with an operating lever for operating the piston on the cylinder body of the hydraulic master cylinder, which is mounted on the handlebar and has a piston inserted therein. A spring member that is rotatably attached via the pivot and that urges the operating lever in the direction of action that operates the piston is provided between the operating lever and the cylinder body on the front side of the vehicle body with respect to the pivot. In the provided bar handle vehicle hydraulic master cylinder device, the operation lever is formed by being divided into a lever body and a knocker arranged in front of the grip of the handlebar, and the knocker operates the piston. A spring-mounted arm for mounting the spring member is provided, and the spring member is characterized in that the intermediate portion in the longitudinal direction is curved in a direction that is convex toward the outside in the radial direction of the pivot. There is.

Further, the hydraulic master cylinder device for a bar handle vehicle of the present invention is mounted on a handlebar, and an operating lever for operating the piston is rotated on a cylinder body of the hydraulic master cylinder in which a piston is inserted via a pivot. A bar handle vehicle that is movably attached and is provided with a spring member that urges the operating lever in the direction of action that operates the piston between the operating lever and the cylinder body on the front side of the vehicle body from the pivot. In the hydraulic master cylinder device, the operation lever faces the first spring mounting hole through which one end side of the spring member is inserted, and the cylinder body faces the second spring mounting hole through which the other end side of the spring member is inserted. The intersection of the central axis of the first spring mounting hole and the central axis of the second spring mounting hole is the center of the bottom wall of the first spring mounting hole and the second spring mounting hole. The spring member is located on the anti-piston side of the straight line connecting the center of the bottom wall of the cylinder, and the spring member is mounted in the first spring mounting hole and the second spring mounting hole in the longitudinal direction. The intermediate portion is characterized in that it is arranged so as to be curved in a direction that is convex toward the outside in the radial direction of the pivot.

Further, the operating lever is formed by being divided into a lever body arranged in front of the grip of the handlebar and a knocker having an acting arm for operating the piston, and the knocker is provided with the first spring mounting hole. It is preferable to form it. Further, it is preferable that the hydraulic master cylinder device for a bar handle vehicle is for a clutch.

According to the hydraulic master cylinder device for a bar handle vehicle of the present invention, the spring member is arranged so as to be curved in a direction in which the intermediate portion in the longitudinal direction is convex toward the outer side in the radial direction of the pivot. Since the compression direction of the spring member is fixed, there is no risk of the spring member buckling. As a result, the posture of the spring member at the start of operation is stable, and the durability of the spring member can be improved.

In addition, even if the operating lever is divided into a lever body arranged in front of the grip of the handlebar and a knocker equipped with an acting arm, the spring member suppresses buckling and stabilizes the posture of the spring member. , Durability can be improved. Furthermore, in the bar handle vehicle hydraulic master cylinder device for clutches, the operating lever is frequently stroked at full stroke, and the spring member is easily damaged. However, the durability of the spring member should be improved to improve maintainability. Can be done.

FIG. 4 is a cross-sectional view taken along the line I-I of FIG. It is sectional drawing of the main part at the time of non-operation of the hydraulic master cylinder apparatus which shows an example of one embodiment of this invention. Similarly, it is a cross-sectional view of a main part when the hydraulic pressure master cylinder device is operated. Similarly, it is a partial cross-sectional side view of the hydraulic master cylinder device. Similarly, it is a plan view of the hydraulic pressure master cylinder device. FIG. 5 is a sectional view taken along line VI-VI of FIG.

1 to 6 are hydraulic master cylinder devices for clutches showing an example of the present invention. The hydraulic master cylinder device 1 includes a hydraulic master cylinder 4 attached near the grip 3 of a handlebar 2 for steering a front wheel (not shown) at the front of the vehicle body, and a clutch rotatably attached to the hydraulic master cylinder 4. An operation lever 5 for use and a push rod 6 interposed between them are provided.

The hydraulic master cylinder 4 is a well-known horizontal master cylinder, and includes a cylinder body 4a attached to the handlebar 2 and a reservoir 7 integrally provided on the upper portion of the cylinder body 4a. The cylinder body 4a is provided with a bottomed cylinder hole 4b that opens inside the vehicle body, and the grip 3 is formed by a bracket half body 4c integrally formed on the opening side of the cylinder hole 4b and a separate half-split body bracket 8. The handlebar 2 is attached to the front of the vehicle body by holding the handlebar 2 in the vicinity and fastening the bracket half body 4c and the half-split body bracket 8 with bolts 9 and 9.

The piston 10 is inserted into the cylinder hole 4b with the cup seals 11 and 12 fitted therein, and the hydraulic chamber 13 is defined between the bottom wall of the cylinder hole 4b and the cup seal 11 on the bottom side of the cylinder hole. Has been done. A return spring 14 is reduced between the bottom wall of the cylinder hole 4b and the piston 10, and the elastic force of the return spring 14 constantly urges the piston 10 in the opening direction of the cylinder hole 4b to push the rod. The retreat limit is regulated by the contact with the tip of 6. A relief port 15 and a supply port 16 communicating with the reservoir 7 are formed on the upper side wall of the cylinder body 4a, and a union hole 17 communicating with the hydraulic chamber 13 is formed on the bottom wall side of the cylinder hole 4b. NS. Further, a pair of upper and lower lever holders 4d and 4d are projected from the opening side of the cylinder body 4a at predetermined intervals, and the operating lever 5 is provided with the first collar 18 and the first collar 18 and the first on the lever holders 4d and 4d. It is rotatably pivoted via a pivot 19 (the pivot of the present invention).

The operating lever 5 is formed by being divided into a lever body 20 operated in front of the vehicle body of the grip 3 and a knocker 21 provided with an acting arm 21a for operating the push rod 6. The knocker 21 is formed in a plate shape and is rotatably connected to the lever holders 4d and 4d. A spring mounting arm 21c that extends from the moving base 21b to the anti-cylinder hole opening side (front side of the vehicle body) to mount the spring member 22, and a connecting arm 21d that projects from the rotating base 21b to the outside of the vehicle body and connects the lever body 20. And have.

The rotation base portion 21b is inserted between the lever holders 4d and 4d, and the lever is inserted by inserting the first collar 18 and the first pivot 19 over the lever holders 4d and 4d and the rotation base portion 21b. It is rotatably connected to the holder 4d. The base end portion of the push rod 6 is connected to the acting arm 21a via the piece member 23. The spring mounting arm 21c is formed with a first spring mounting hole 21e through which one end side of the spring member 22 is inserted, and the cylinder body 4a is opposed to the first spring mounting hole 21e and is on the other end side of the spring member 22. A second spring mounting hole 4e is formed through which the spring member 22 is inserted, and the spring member 22 is reduced over the first spring mounting hole 21e and the second spring mounting hole 4e.

As shown in FIG. 2, the first spring mounting hole 21e and the second spring mounting hole 4e are the intersections of the central axis CL1 of the first spring mounting hole 21e and the central axis CL2 of the second spring mounting hole 4e. P1 is formed so as to be located on the anti-first pivot side of the straight line SL1 connecting the center CP1 of the bottom wall of the first spring mounting hole 21e and the center CP2 of the bottom wall of the second spring mounting hole 4e. .. The spring member 22 is a coil spring set to have a lower elastic force than the return spring 14, and is a state in which the spring member 22 is contracted over the first spring mounting hole 21e and the second spring mounting hole 4e. The intermediate portion M1 in the longitudinal direction is arranged so as to be curved in a direction that is convex toward the outer side in the radial direction of the first pivot 19.

The lever body 20 includes a base portion 20a that is rotatably connected to the connecting arm 21d, and an operating portion 20b that extends from the base portion 20a toward the front portion of the vehicle body of the grip 3. The base portion 20a is formed in a bifurcated shape, and the connecting arm 21d of the knocker 21 is inserted between the base portions 20a, and the second collar 24 and the second pivot 25 are inserted through the base portion 20a and the connecting arm 21d. , The lever body 20 is rotatably connected to the connecting arm 21d. Further, an adjusting bolt 26 is arranged on the vehicle body side of the base portion 20a so that the amount of protrusion can be adjusted, and the tip portion of the adjusting bolt 26 is in contact with the lever body facing surface 21f of the knocker 21. Spring holes 20c and 21g are formed so as to face each other on the anti-vehicle body side of the base portion 20a and the connecting arm 21d, respectively. , The adjusting bolt 26 is pressed against the lever body facing surface 21f.

In the non-operating operating lever 5, the piston 10 is arranged in the retracted limit due to the elastic force of the return spring 14. At this time, the knocker 21 is urged by the spring member 22 in the acting direction with a smaller elastic force than the return spring 14, so that rattling is prevented. Further, in the lever body 20, the tip of the adjust bolt 26 is pressed against the lever body facing surface 21f by the elastic force of the adjust spring 27, and the grip allowance is set according to the protrusion amount of the adjust bolt 26, and the lever The rattling of the main body 20 is prevented, and the rattling of the entire operating lever 5 is prevented.

When the operation unit 20b is grasped and the operation is started from this non-operating state, the lever body 20 and the knocker 21 are integrated and rotate clockwise with the first pivot 19 as a fulcrum, and the knocker The acting arm 21a of 21 pushes the push rod 6 and operates the clutch by the hydraulic pressure generated in the hydraulic chamber 13. Further, when the operation is released, the knocker 21 and the lever body 20 return to the initial positions due to the elastic force of the return spring 14. As shown in FIG. 3, the spring member 22 during operation extends in a state in which the longitudinal intermediate portion M1 of the spring member 22 is curved in a direction that is convex toward the outer side in the radial direction of the first pivot 19. In this embodiment, the first position substantially corresponds to the intersection P1 where the central axis CL1 of the first spring mounting hole 21e and the central axis CL2 of the second spring mounting hole 4e intersect during non-operation and operation. A longitudinal intermediate portion M1 that is convex outward in the radial direction of the pivot 19 is located, but the position of the longitudinal intermediate portion M1 is not limited to this and is arbitrary.

The spring member 22 expands and contracts as the knocker 21 rotates about the first pivot 19 during operation and release, but the spring member 22 has a longitudinal intermediate portion outside the first pivot 19 in the radial direction. Since the spring member 22 is arranged to be curved in a convex direction toward the direction of the spring member 22, the central axis CL3 (the line connecting the central axis CL1 and the central axis CL2) is the bending direction of the spring member 22 during operation. The directions are the same, and there is no risk of the spring member 22 buckling. As a result, the posture of the spring member 22 is stabilized during operation and release, and the durability of the spring member 22 can be improved. In particular, in a hydraulic master cylinder device for a clutch in which the operating lever 5 is frequently fully stroked, the durability of the spring member 22 is improved and the maintainability is improved.

The present invention can be applied not only to the hydraulic master cylinder device using the two-piece type operating lever as in the above-described embodiment, but also to the hydraulic master cylinder device using the integrated operating lever. .. Further, it can be applied to the one using a vertical hydraulic master cylinder, and the structure of the hydraulic master cylinder is arbitrary. Further, it can be applied to a hydraulic master cylinder device for a brake.

1 ... Hydraulic master cylinder device, 2 ... Handle bar, 3 ... Grip, 4 ... Hydraulic master cylinder, 4a ... Cylinder body, 4b ... Cylinder hole, 4c ... Bracket half body, 4d ... Lever holder, 4e ... Second spring Mounting holes, 5 ... Operating levers, 6 ... Push rods, 7 ... Reservoir, 8 ... Semifield brackets, 9 ... Bolts, 10 ... Pistons, 11, 12 ... Cup seals, 13 ... Hydraulic chambers, 14 ... Return springs, 15 ... Relief port, 16 ... Supply port, 17 ... Union hole, 18 ... 1st collar, 19 ... 1st pivot, 20 ... Lever body, 20a ... Base, 20b ... Operation part, 20c ... Spring hole, 21 ... Knocker, 21a ... Acting arm, 21b ... Rotation base, 21c ... Spring mounting arm, 21d ... Connecting arm, 21e ... First spring mounting hole, 21f ... Lever body facing surface, 21g ... Spring hole, 22 ... Spring member, 23 ... Piece Member, 24 ... 2nd collar, 25 ... 2nd pivot, 26 ... Adjust bolt, 27 ... Adjust spring

Claims (4)

An operation lever that operates the piston is rotatably attached to the cylinder body of the hydraulic master cylinder mounted on the handlebar and the piston is inserted via a pivot, and the operation on the front side of the vehicle body with respect to the pivot. In a bar handle vehicle hydraulic master cylinder device in which a spring member for urging the operating lever in the action direction for operating the piston is provided between the lever and the cylinder body.
The operating lever is formed by being divided into a lever body and a knocker arranged in front of the grip of the handlebar.
The knocker includes a working arm for operating the piston and a spring-mounted arm for mounting the spring member.
The spring member is a hydraulic master cylinder device for a bar handle vehicle, wherein the intermediate portion in the longitudinal direction is curved in a direction that is convex toward the outer side in the radial direction of the pivot. An operation lever that operates the piston is rotatably attached to the cylinder body of the hydraulic master cylinder mounted on the handlebar and the piston is inserted via a pivot, and the operation on the front side of the vehicle body with respect to the pivot. In a bar handle vehicle hydraulic master cylinder device in which a spring member for urging the operating lever in the action direction for operating the piston is provided between the lever and the cylinder body.
A first spring mounting hole for inserting one end side of the spring member into the operating lever is formed, and a second spring mounting hole for inserting the other end side of the spring member is formed in the cylinder body so as to face each other. The intersection of the central axis of the spring mounting hole and the central axis of the second spring mounting hole connects the center of the bottom wall of the first spring mounting hole and the center of the bottom wall of the second spring mounting hole. The spring member is located on the anti-pivot side of the straight line, and the spring member is mounted in the first spring mounting hole and the second spring mounting hole. A hydraulic master cylinder device for a bar handle vehicle, characterized in that it is arranged so as to be curved in a direction that is convex toward the outside in the direction. The operating lever is divided into a lever body arranged in front of the grip of the handlebar and a knocker provided with an acting arm for operating the piston, and the knocker is formed with the first spring mounting hole. 2. The hydraulic master cylinder device for a bar handle vehicle according to claim 2. The hydraulic master cylinder device for a bar handle vehicle according to any one of claims 1 to 3, wherein the hydraulic master cylinder device for a bar handle vehicle is for a clutch.

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