JP4551841B2 - Hydraulic master cylinder device for bar handle vehicle - Google Patents

Description

  In the present invention, the axis of the cylinder body of a hydraulic master cylinder that hydraulically operates a clutch or brake of a bar handle vehicle such as a motorcycle is arranged so as to be orthogonal to a virtual plane passing through the central axis of the handle bar. The present invention relates to a vertically mounted bar handle vehicle hydraulic master cylinder device.

As a vertically installed hydraulic master cylinder device, the cylinder body axis is arranged so as to be substantially perpendicular to the vertical plane including the center axis of the handlebar, and the piston is movably inserted into a cylinder hole provided in the cylinder body. At the same time, there is a lever holder that extends from the cylinder body and pivotally supports the base of the operation lever. A push rod that comes into contact with the end face of the piston is provided at the rotation base of the operation lever, and a grip operation part of the operation lever is disposed in front of the grip that is connected to the handle bar. There is one in which the push rod pushes the piston and performs a braking operation by gripping the part and rotating it in the grip direction (see, for example, Patent Document 1).
JP 2001-63546 A

  In the above configuration, when operating the operating lever, the positional relationship between the center of the handlebar and the center axis of the handlebar is not specified, but the center of the handlebar and the handlebar are not specified. The positional relationship with the central axis greatly affects the operational feeling given to the operator.

  Accordingly, the present invention provides a hydraulic master cylinder device for a bar handle vehicle that can identify the best positional relationship between the grip center of the operation lever and the center axis of the handle bar and obtain a good operation feeling. It is aimed.

In order to achieve the above object, the present invention provides a hydraulic master cylinder in which an axis of a cylinder body is orthogonal to a virtual plane passing through the central axis of a handlebar, and a base is pivotally attached to the cylinder body. And a push rod interposed between the operation lever and the piston of the hydraulic master cylinder. In the bar handle vehicle hydraulic master cylinder device, a grip operating portion of the operation lever is provided. A plane formed by the rotation of the center line passing through the center of the grip passes through the center axis of the handle bar and is parallel to the axis of the cylinder body.

  By configuring the present invention as described above, the axis of the handlebar and the grip center of the grip operating portion are disposed on the same plane, so that a good operation feeling can be obtained.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a side view of a hydraulic master cylinder device showing one embodiment of the present invention as viewed from the grip side. FIG. FIG. 3 is a cross-sectional plan view of the hydraulic master cylinder device, and FIG. 4 is a plan view of the hydraulic master cylinder device.

  The hydraulic master cylinder device 1 includes a hydraulic master cylinder 4 attached in the vicinity of an accelerator grip 3 of a handlebar 2 that steers a front wheel (not shown) at the front of the vehicle body, and an operation lever 5 attached to the hydraulic master cylinder 4. And a push rod 6 interposed between them.

  The hydraulic master cylinder 4 is a vertically placed master cylinder that is disposed so that the axis CL1 of the cylinder body 7 is orthogonal to the virtual plane A1 passing through the center axis CL2 of the handlebar 2. In this embodiment, the hydraulic master cylinder 4 The central axis CL2 of the bar 2 is oriented horizontally, the virtual plane A1 passing through the central axis CL2 of the handle bar 2 is a vertical plane, and the axis CL1 of the cylinder body is located below the central axis CL2 of the handle bar 2 Yes. The cylinder body 7 includes a bottomed cylinder hole 8 that opens to the front side of the vehicle body, a bracket half 7a formed integrally with the cylinder body 7 on the bottom side of the cylinder hole 8, and a separate half-split bracket. 9, the handlebar 2 in the vicinity of the accelerator grip 3 is held, and the brackets 7 a and 9 are fastened with bolts 10 and 10, so that the handlebar 2 is attached to the front side of the vehicle body slightly below.

  In the cylinder hole 8, the piston 11 is inserted with the primary cup 12 a and the secondary cup 12 b fitted, and a hydraulic chamber 13 is defined between the piston 11 and the bottom wall of the cylinder hole 8. Yes. A return spring 14 is contracted between the bottom wall of the cylinder hole 8 and the piston 11, and due to the elastic force of the return spring 14, the piston 11 is constantly urged in the opening direction of the cylinder hole 8, and the push rod 6. The retreat limit is regulated by contact with the front end portion 6 a, and a piston 15 retaining ring 15 is attached to the opening of the cylinder hole 8.

  A relief port 16 and a supply port 17 are provided on the upper side wall of the cylinder body 7 so as to communicate with the cylinder hole 8. A connector 18 to which a reservoir hose (not shown) is connected is provided on both the ports 16 and 17. In addition, the hydraulic fluid flows between the cylinder hole 8 and the reservoir. At the front end of the cylinder body 7, a pair of upper and lower lever holders 7b, 7b are projected with a predetermined gap, and the operation lever 5 is rotated using a collar 21 and a pivot 22 on the lever holders 7b, 7b. It is pivotally mounted.

  The operation lever 5 is composed of two pieces including a lever main body 19 disposed in front of the accelerator grip 3 and a knocker 20 disposed between the lever main body 19 and the cylinder body 7. Yes. The lever body 19 includes a pivot base 19a (base) that is pivotally supported by the lever holders 7b and 7b so as to be pivotable by a pivot 22 and a grip operation section that is disposed substantially along the front of the accelerator grip 3 in the vehicle body. 19b, and an accommodation recess 19c for accommodating the knocker 20 and a recess 19d formed on the surface facing the working arm 20a of the knocker 20 are formed in the rotation base 19a. ing.

  The knocker 20 is bent approximately 90 degrees in the opposite direction to the working arm 20a from the working arm 20a, the turning base 20b pivotally supported by the pivot 22, and the turning base 20b. And the formed stopper piece 20c. A columnar piece member 23 is rotatably mounted on the working arm 20a, and the proximal end of the push rod 6 is inserted into the piece member 23. The spherical distal end portion 6a of the push rod 6 is The hemispherical engagement portion 11a formed at the end of the piston 11 is rotatably abutted. Further, the stopper piece 20c is in contact with the vehicle body inner wall of the cylinder body 7 and when the knocker 20 that rotates counterclockwise in FIG. 3 is not braked by the elastic force of the return spring 14 in the cylinder hole 8 is not braked. Regulate the retreat limit. Further, a spring 24 that allows the lever body 19 to rotate when the grip is adjusted is provided between the contact surface 20 d and the rotation base 19 a of the lever body 19.

  A grip allowance adjusting mechanism 25 is disposed between the working arm 20 a and the recess 19 d of the lever body 19. The grip allowance adjusting mechanism 25 includes an adjuster 26 that is rotatably provided in the recess 19 d of the lever main body 19, and a contact surface 20 d of the knocker 20 with which the cam portion 26 a at the tip of the adjuster 26 contacts. The adjuster 26 has a plurality of cam surfaces set at unequal distances from the center of the shaft at the cam portion 26a at the tip, and the dial 27 on the upper surface of the lever body 19 is rotated so that any one of the cam surfaces is moved. By selectively abutting on the abutting surface 20d of the knocker 20, the grip margin set between the grip operating portion 19b of the lever main body 19 and the accelerator grip 3 can be adjusted.

  Before the lever body 19 and the knocker 20 are mounted on the lever holders 7b and 7b, the rotation base 20b of the knocker 20 is inserted between the upper arm and the lower arm of the rotation base 19a of the lever body 19 and both rotations are performed. By aligning the pivot insertion holes of the base portions 19a and 20b and inserting the collar 21, the operation lever 5 is temporarily assembled. In this state, both rotation bases 19a and 20b are inserted between the lever holders 7b and 7b, the collar 21 is aligned with the insertion holes and female screw holes of the lever holders 7b and 7b, and the pivot 22 is placed on the upper lever. By inserting and attaching from the holder 7 b side, the lever main body 19 and the knocker 20 are pivotally supported around the pivot 22.

  In this way, the elastic force of the return spring 14 inside the hydraulic chamber 13 acts on the operating lever 5 mounted on the hydraulic master cylinder 4 through the piston 11 and the push rod 6 at all times, and the operating lever 5 is not operated. Is set by the contact between the stopper piece 20c on the hydraulic master cylinder side of the knocker 20 and one side wall of the cylinder body 7 and the cam surface selected by the grip allowance adjusting mechanism 25. A predetermined grip margin is formed between the portion 19 b and the accelerator grip 3.

  Further, the operation lever 5 has a plane A2 formed by turning a center line CL3 passing through the grip center P1 of the grip operation portion 19b passing through the center axis CL2 of the handlebar 2, and the cylinder body 7 In this embodiment, the plane A2 is a horizontal plane that passes through the center axis CL2 of the handle bar 2, and the pivot 22 is formed below the grip center P1. The

  When the bar handle vehicle travels, the operator grasps the grip center P1 portion of the operation lever 5 and rotates the lever body 19 and the knocker 20 in the direction of the accelerator grip 3 with the pivot 22 as a fulcrum. The arm 20 a pushes the push rod 6 through the piece member 23, and the push rod 6 pushes the piston 11 toward the bottom of the cylinder hole 8. As a result, the hydraulic fluid in the hydraulic pressure chamber 13 is boosted and supplied to the front brake, and the braking action of the front wheels is performed. At this time, the center axis CL2 of the handle bar 2 is oriented in the horizontal direction, and the axis CL1 of the cylinder body 7 is disposed so as to be orthogonal to the vertical virtual plane A1 passing through the center axis CL2 of the handle bar 2. At the same time, the operating lever 5 has a plane A2 along which the center line CL3 of the grip operating portion 19b is parallel to the axis CL1 of the cylinder body 7 and is a vertical plane passing through the center axis CL2 of the handlebar 2 in the horizontal direction. By being provided so as to rotate, it is possible to obtain a good operation feeling and push the piston 11 in a good state.

  FIG. 5 shows a second embodiment of the present invention. The same members as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the hydraulic master cylinder device 30 according to the present embodiment, when the central axis CL10 of the handle bar 31 is arranged in the horizontal direction, the hydraulic master cylinder 32 has the axis CL11 of the cylinder body 33 so that the center of the handle bar 31 is centered. The handle bar 31 is disposed in a direction orthogonal to the vertical plane A10 passing through the axis CL10 and above the center axis CL10 of the handle bar 31. The operation lever 34 is formed such that the center line of the grip operation portion rotates along a horizontal plane A11 passing through the center axis CL10 of the handle bar 31.

  The operation lever of the present invention is not limited to the two-piece type composed of the lever main body 19 and the knocker 20 as in the above-described embodiment, but an integrated operation lever that does not include the grip allowance adjusting mechanism 25. The present invention can be applied to the hydraulic master cylinder device used, and can also be applied to a hydraulic master cylinder device for a clutch.

It is the side view which looked at the hydraulic master cylinder device which shows the example of the 1st form of the present invention from the grip side. It is II-II sectional drawing of FIG. It is a sectional top view of a hydraulic master cylinder device similarly. It is a top view of a hydraulic master cylinder device similarly. It is sectional drawing of the hydraulic master cylinder apparatus which shows the 2nd form example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,30 ... Hydraulic pressure master cylinder apparatus, 2,31 ... Handlebar, 3 ... Accelerator grip, 4,32 ... Hydraulic pressure master cylinder, 5,34 ... Operation lever, 6 ... Push rod, 6a ... Tip part, 7, 33 ... Cylinder body, 7a ... Bracket half, 7b ... Lever holder, 8 ... Cylinder hole, 9 ... Half split bracket, 10 ... Bolt, 11 ... Piston, 11a ... Hemispherical engagement part, 12a ... Primary cup, 12b ... Secondary cup, 13 ... Hydraulic chamber, 14 ... Return spring, 15 ... Ring, 16 ... Relief port, 17 ... Supply port, 18 ... Connector, 19 ... Lever body, 19a ... Rotating base, 19b ... Grip operation part, 19c: receiving recess, 19d: recess, 20 ... knocker, 20a ... working arm, 20b ... rotating base, 20c ... stopper piece, 20d ... contact surface, 2 ... Collar, 22 ... Pivot, 23 ... Frame member, 24 ... Spring, 25 ... Grip adjustment mechanism, 26 ... Adjuster, 26a ... Cam part, 27 ... Dial, CL1, CL11 ... Cylinder body axis, CL2, CL10 ... Handle Center axis of the bar, CL3: center line of the grip operation section, A1: virtual plane, A2: plane passing through the center axis CL2, P1, ... grip center

Claims (1)

A hydraulic master cylinder arranged such that the axis of the cylinder body is orthogonal to a virtual plane passing through the central axis of the handlebar; an operating lever whose base is pivotally attached to the cylinder body; the operating lever; In a hydraulic master cylinder device for a bar handle vehicle provided with a push rod interposed between a piston of a hydraulic master cylinder, a center line passing through a grip center of a grip operation portion of the operation lever is rotated. A hydraulic master cylinder device for a bar handle vehicle, characterized in that the plane formed by passes through the central axis of the handle bar and is parallel to the axis of the cylinder body.

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