JP2010143508A - Operating lever mounting structure of hydraulic master cylinder device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an operating lever mounting structure capable of simply performing attaching and detaching of a lever pin and facilitating assembling or changing work of the operating lever. <P>SOLUTION: The lever pin 9 is equipped with a shaft part 9a, a large diameter head part 9b, and a peripheral groove 9c provided at a projection base part of the shaft part 9a. A retaining member 12 is equipped with a substrate part 12a, a peripheral groove fit-in recessed part 12b opened to one side of the substrate part 12a and formed in a U shaped form, a rising piece 12c provided on the other side of the substrate part 12a, a resilient piece 12d extending from the rising piece 12c and elastically abutting on the peripheral surface of the shaft part 9a, and a turning restriction piece 12e extending from the substrate part 12a in the direction parallel to the substrate part 12a. A pair of turning preventive projections 13a, 13b which prevents the turning of the retaining member 12 by locking both the side edges of the turning restriction piece 12e are projectingly provided on a turning piece 3f of the operating lever 3. A switch mounting part 5e which prevents the peripheral groove fit-in recessed part 12b from moving to the direction separated from the peripheral groove 9c is provided and a vehicle body front side surface 5f of the switch mounting part 5e is made to be a separation preventing projection. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an operation lever mounting structure of a hydraulic master cylinder device, and more specifically, a lever mounting portion provided on a lever bracket protruding from a cylinder body and a rotation base formed on the operation lever are superposed, A hydraulic pressure master cylinder device in which a pin insertion hole is formed through the overlapping portion of the rotation base portion and the lever attachment portion, a lever pin is attached to the pin insertion hole, and the operation lever is rotatably attached to the lever bracket. The present invention relates to an operation lever mounting structure.

Conventionally, as an operation lever mounting structure of a hydraulic master cylinder device, a bifurcated lever bracket protrudes from a cylinder body of a hydraulic master cylinder mounted on a handlebar, and one lever mounting portion of the lever bracket and the other are mounted. Insert the rotation base of the operation lever between the lever mounting part and attach the lever pin to the pin insertion hole provided in the overlapping part of the lever mounting part and the rotation base so that the operation lever can be rotated to the lever bracket A rotating base of an attachment lever (for example, see Patent Document 1) or an operation lever is formed in a bifurcated shape, and a plate-like lever bracket protruding from the cylinder body of the master cylinder is inserted into the bifurcated rotational base. A lever pin is attached to the overlapping portion of the lever mounting portion and the rotation base portion, and the operation lever is rotatably attached to the lever bracket (for example, see Patent Document 2). .) There was.
Japanese Utility Model Publication No. 54-128241 JP 2008-126989 A

  However, in the conventional operation lever mounting structure, groove portions are formed in the head portion of the lever pin and the lower end of the shaft portion, and a retaining ring is fitted in both groove portions to fix the lever pin to the lever holder, or a male screw is attached to the tip of the lever pin. Since the nut is attached to the male screw part of the lever pin that protrudes from the rotating base and the lever pin is fixed to the rotating base of the operating lever, a tool is required to attach and detach the lever pin. Replacing the operating lever took time and maintenance was not good.

  Therefore, the present invention provides an operating lever mounting structure for a hydraulic master cylinder device that can securely mount the lever pin, can easily attach and detach the lever pin, and can easily assemble and replace the operating lever. The purpose is to do.

  In order to achieve the above object, in the first structure of the present invention, the lever mounting portion of the lever bracket projecting from the cylinder body of the hydraulic master cylinder and the rotating base portion of the operating lever are overlapped to form the rotating base portion. A pin insertion hole is formed through the overlapping portion of the lever mounting portion and the lever pin inserted into the pin insertion hole is secured by a retaining member to be mounted, so that the operation lever is pivoted to the lever bracket. In the operation lever mounting structure of the hydraulic master cylinder device that can be mounted, the lever pin is provided in a shaft portion inserted into the pin insertion hole and one end of the shaft portion and comes into contact with one side surface of the overlapping portion. A substrate portion having a large-diameter head and a circumferential groove provided in a protruding base portion of the shaft portion protruding from the other side surface of the overlapping portion, wherein the retaining member has a surface parallel to the other side surface of the overlapping portion; When, A circumferential groove fitting recess formed in a U shape by opening one side of the substrate part, a rising piece bent in a direction perpendicular to the substrate part from the other side of the substrate part, and the rising piece A resilient piece that elastically contacts the circumferential surface of the shaft portion on the distal side in the protruding direction from the circumferential groove when the circumferential groove fitting concave portion and the circumferential groove are fitted, and the substrate A pair of rotation restricting pieces extending in a direction parallel to the substrate portion from the portion, and a pair of edges that prevent both sides of the turn restricting pieces from being locked to the other side surface of the overlapping portion A rotation preventing projection is provided so that the circumferential groove fitting recess and the circumferential groove are fitted, and the rotation restricting piece is locked to the rotation preventing projection, and the other overlapping portions. When the circumferential groove fitting recess moves in a direction facing the other side of the substrate portion on the side surface in a direction away from the circumferential groove, the other side of the substrate portion There is characterized in that the circumferential groove fitting recess abuts is provided separation preventing protrusion for preventing the disengagement from the circumferential groove.

  Further, in the second structure, the lever mounting portion of the lever bracket projecting from the cylinder body of the hydraulic master cylinder and the rotating base portion of the operation lever are overlapped, and the rotating base portion and the lever mounting portion are overlapped. A hydraulic master cylinder in which the operation lever is rotatably attached to the lever bracket by forming a pin insertion hole in the portion and preventing the lever pin inserted into the pin insertion hole from being attached with a retaining member. In the operation lever mounting structure of the apparatus, the lever pin includes a shaft portion that is inserted into the pin insertion hole, a large-diameter head that is provided at one end of the shaft portion and contacts one side surface of the overlapping portion, and the overlapping portion. And a circumferential groove provided on a protruding base portion of the shaft portion protruding from the other side surface of the portion, and the retaining member includes a substrate portion having a surface parallel to the other side surface of the overlapping portion, and one side of the substrate portion Open the way A U-shaped circumferential groove fitting recess, a rising piece bent in a direction perpendicular to the substrate portion from the other side of the substrate portion, and the circumferential groove fitting extending from the rising piece A resilient piece that elastically contacts the circumferential surface of the shaft portion on the distal side in the protruding direction from the circumferential groove when the recess and the circumferential groove are fitted, and a direction parallel to the substrate portion from the substrate portion A rotation restricting piece extending to the opposite side of the overlapping portion, and a pair of anti-rotation projections for locking the retaining member by locking both side edges of the rotation restricting piece, In a state where the circumferential groove fitting recess and the circumferential groove are fitted, and in a state where the rotation restricting piece is locked to the rotation preventing projection, both sides of the pair of rotation preventing projection and the rotation restricting piece The circumferential groove fitting concave portion is prevented from moving in a direction away from the circumferential groove by locking with the edge.

  The rotation restricting piece extends from the other side of the substrate portion in a direction orthogonal to the opening direction of the circumferential groove fitting recess, or the opening of the circumferential groove fitting recess of the substrate portion. From the front end of the peripheral portion, the one extending in the same direction as the opening direction of the peripheral groove fitting recess, or from the front end of the peripheral groove fitting recess of the substrate portion, perpendicular to the opening direction of the peripheral groove fitting recess It may extend in the direction in which it is made, or the tip of the rotation restricting piece may be bent to form the knob.

  Further, the substrate portion may include a pressing portion that presses the circumferential groove in a direction in which a lever pin is inserted. Further, the retaining member can be formed by cutting and bending a single plate-like member.

  According to the operation lever mounting structure of the hydraulic master cylinder device of the present invention, the circumferential groove formed at one end portion of the lever pin, and the detent projection provided at the overlapping portion of the lever bracket projecting from the one end portion and the operation lever By using the retaining member that is detachably engaged with the lever pin, the lever pin can be securely attached to the overlapping portion with a simple structure and can be held detachably with a simple structure.

  In the first structure, the retaining member rotates the rotation restricting piece around the lever pin in a state where the circumferential groove fitting recess of the retaining piece is fitted in the circumferential groove, and the rotation restricting piece becomes the rotation preventing projection. By locking, the retaining member can be prevented from rotating, and the retaining member can be prevented from detaching from the circumferential groove by the separation preventing projection, and the lever pin can be securely attached to the overlapping portion. In addition, the lever pin can be removed from the pin insertion hole by rotating the rotation restricting piece, removing the rotation restricting piece from the anti-rotation protrusion, and removing the retaining piece from the circumferential groove, so the operation lever can be easily replaced. It is possible to improve the maintainability.

  In the second structure, the retaining member forms the circumferential groove fitting recess in the circumferential groove so that the rotation regulating piece is directed in the direction in which the rotation preventing projection is provided, and the rotation regulating piece is locked to the rotation preventing projection. Thus, the retaining member can be prevented from rotating, and the retaining member can be prevented from detaching from the circumferential groove by the engagement of the rotation preventing projection with the rotation restricting piece, so that the lever pin is securely attached to the overlapping portion. Can be installed. In addition, the lever pin can be removed from the pin insertion hole by removing the retaining piece from the circumferential groove and removing the rotation restricting piece from the rotation-preventing projection. Improvements can be made.

  Further, the rotation restricting piece extends from the other side of the substrate part in a direction orthogonal to the opening direction of the circumferential groove fitting recess, or the opening end of the circumferential groove fitting recess of the substrate part Extending in the same direction as the opening direction of the circumferential groove fitting recess, or extending from the opening end of the circumferential groove fitting recess of the substrate portion in a direction perpendicular to the opening direction of the circumferential groove fitting recess. By pulling out, it can be easily formed integrally with the substrate part.Further, if the knob is formed by bending the tip of the rotation restricting piece, the rotation restricting piece is held by holding the knob. It can be easily locked to the rotation stop projection. Furthermore, by forming a pressing portion that presses the circumferential groove in the direction in which the lever pin is inserted in the retaining piece, it is possible to suppress vibration and backlash of the lever pin and the retaining member. Further, if the retaining member is formed by cutting and bending a single plate-like member, the retaining member can be manufactured at low cost, and the cost can be reduced.

  1 to 4 are views showing an operating lever mounting structure of a hydraulic master cylinder device showing a first embodiment of the present invention, FIG. 1 is an explanatory view of a main part showing the operating lever mounting structure, and FIG. II-II sectional view, FIG. 3 is a partial sectional side view of a hydraulic master cylinder device, and FIG. 4 is an exploded perspective view of a lever pin and a retaining member.

  A hydraulic master cylinder device 1 shown in the present embodiment is a hydraulic master cylinder device for a front brake in which a hydraulic master cylinder 2 and an operation lever 3 are combined. The hydraulic master cylinder device 1 steers front wheels at the front of a vehicle body of a bar handle vehicle. It is attached to the handlebar 4.

  The hydraulic master cylinder 2 is a reservoir-integrated type in which a reservoir 5a is integrally provided on an upper portion of a cylinder body 5, and a body mounting bracket 5b is integrally formed on the cylinder body 5, and the body mounting bracket 5b, the holder 6, Thus, the handle bar 8 inside the vehicle body is held with respect to the accelerator grip 7, and the vehicle body mounting bracket 5b and the holder 6 are fastened with bolts and attached to the front side of the handle bar 8 on the vehicle body.

  A lever bracket 5c formed in a substantially rectangular plate shape is integrally provided on the vehicle body front side of the cylinder body 5, and a pin insertion through which a lever pin 9 for attaching the operation lever 3 is inserted into the lever bracket 5c. A hole 5d is formed. A switch mounting portion 5e is provided on the lever bracket 5c side of the cylinder body 5 below the vehicle body, and a brake lamp switch 10 is fixed to the switch mounting portion 5e with a screw 11.

  The operation lever 3 includes a rotation base portion 3a, a grip portion 3b, an action arm 3c, and a switch operation piece 3d. The pivot base 3a includes pivot pieces 3e and 3f that protrude upward and downward with an interval in which the lever bracket 5c can be inserted, and is formed in a bifurcated shape in which the proximal end side of the operation lever 3 is opened. A pin insertion hole 3g that is coaxial with the pin insertion hole 5d in a state where the lever bracket 5c is inserted between the rotation pieces 3e and 3f and overlapped with the rotation pieces 3e and 3f (overlapping portion of the present invention). , 3h. Further, the switch operating piece 3d is formed on the rotating piece 3f arranged on the lower side of the vehicle body.

  The lever pin 9 includes a shaft portion 9a that is inserted into the pin insertion holes 3e, 5d, and 3f, and a large-diameter head portion 9b that is provided at one end of the shaft portion 9a and contacts the outer surface of the rotating piece 3e on the vehicle body upper side. And a circumferential groove 9c provided at the protruding base portion of the shaft portion 9a protruding from the rotating piece 3f on the vehicle body lower side.

  The retaining member 12 includes a substrate portion 12a having a surface parallel to the rotating piece 3f, a circumferential groove fitting recess 12b formed in a U shape by opening one side of the substrate portion 12a, and the substrate portion 12a. A rising piece 12c bent from the other side in a direction orthogonal to the substrate portion 12a, and a circumferential groove fitting recess 12b and the circumferential groove 9c extending from one side portion of the rising piece 12c are fitted. A resilient piece 12d that elastically contacts the circumferential surface of the shaft portion 9a on the distal side in the protruding direction from the circumferential groove 9c, and a direction parallel to the substrate portion 12a from the other side of the substrate portion 12a, And a rotation restricting piece 12e extending in a direction orthogonal to the opening direction of the circumferential groove fitting recess 12b, and the tip of the turn restricting piece 12e is folded back in the direction of the rising piece 12c. A portion 12f is formed.

  A pair of anti-rotation protrusions 13a and 13b are provided on the lower surface of the rotation piece 3f so that both side edges of the rotation restricting piece 12e are locked to prevent the retaining member 12 from rotating. The anti-rotation protrusions 13a and 13b are provided in parallel with the axis of the hydraulic master cylinder 2 when the operation lever 3 is not operated, and the center line T1 between the opposing surfaces of the anti-rotation protrusions 13a and 13b is inserted into the pin. It arrange | positions from the center of the hole 3g to the vehicle body rear part side. In addition, a guide surface 13c is provided on the vehicle body front side of the rotation prevention projection 13a located on the vehicle body front side. The guide surface 13c has a slope between the protruding end surface of the rotation prevention projection 13a and the lower surface of the rotating piece 3f. In addition, the dimension D1 of the opening end of the circumferential groove fitting recess 12b can be inserted into the circumferential groove 9c of the lever pin 9 and is smaller than the diameter D2 of the lever pin 9.

  The hydraulic master cylinder 2 and the operating lever 3 are assembled in the state where the lever bracket 5c and the rotating pieces 3e and 3f are superposed and superposed, and the lever pin 9 is inserted into the pin insertion holes 3g and 5d from above the vehicle body. 3h in order, the large-diameter head portion 9b is brought into contact with the upper surface of the overlapping portion of the lever bracket 5c and the rotating pieces 3e, 3f, and the shaft portion 9a on the tip side from the circumferential groove 9c from the lower surface of the overlapping portion. And the retaining member 12 is attached to the circumferential groove 9c to prevent the lever pin 9 from coming off.

  First, as shown in the imaginary line in FIG. 1, the retaining member 12 is mounted with the opening of the circumferential groove fitting recess 12b of the retaining piece 12c facing the rear side of the vehicle body in front of the lever pin 9 and the rotation restriction. The extending end of the piece 12f is directed toward the outer side of the vehicle body with respect to the lever pin 9, that is, toward the grip portion 3b of the operation lever 3, and the circumferential groove fitting recess 12b is inserted into the circumferential groove 9c of the lever pin 9 from the front of the vehicle body. . Thereby, the board | substrate part 12a is fitted by the circumferential groove 9c, and the elastic piece 12e elastically contact | abuts to the surrounding surface of the axial part 9a of the protrusion direction front end side of the lever pin 9. FIG. From this state, as shown by an arrow A, the rotation restricting piece 12f passes through the front side of the vehicle body and is rotated approximately 180 degrees around the lever pin 9 to the vehicle body inner side position. , 13b, the retaining member 12 is prevented from coming off. Further, a switch mounting portion 5e is projected at a position facing the other side of the substrate portion 12a in a state where the rotation restricting piece 12e is locked to the rotation preventing projections 13a and 13b. The vehicle body front side surface 5f of the portion 5e serves as a detachment prevention protrusion of the present invention, and the vehicle body front side surface 5f causes the other side of the substrate portion 12a to move in the direction in which the circumferential groove fitting recess 12b is detached from the circumferential groove 9c. It is possible to prevent the circumferential groove fitting concave portion 12b from coming off from the circumferential groove 9c, and the retaining member 12 can be securely attached to the pin insertion holes 3g, 5d, and 3h.

  Further, when exchanging the operation lever 3, the rotation restricting piece 12f is turned over approximately 180 degrees in the direction opposite to the arrow A over the rotation preventing projection 13a, and the substrate portion 12a is removed from the circumferential groove 9c. At the same time, the contact between the bullet piece 12 e and the shaft portion 9 a is released, and the retaining member 12 is removed from the lever pin 9. Thereby, the lever pin 9 can be easily removed from the pin insertion holes 3g, 5d, and 3h without using a tool, and the operation lever 3 can be replaced, thereby improving the maintainability.

  FIGS. 5 to 15 show other embodiments of the present invention. Components that are the same as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. FIG. 5 is an exploded perspective view of a lever pin and a retaining member showing a second embodiment of the present invention. The retaining member 14 of the present embodiment includes a pair of rising pieces 12c and 12c, and one rising piece 12c includes the above-described rising pieces 12c. The same resilient piece 12d as in the first embodiment is provided, and the other rising piece 12c is provided with a resilient piece 12g that resiliently contacts the peripheral surface of the shaft portion 9a on the distal end side in the protruding direction of the lever pin 9. The structure is provided so as to be opposed to the elastic piece 12d, and the pair of elastic pieces 12d and 12g elastically support both side surfaces of the tip portion of the shaft portion 9a of the lever pin 9.

  6 and 7 show a third embodiment of the present invention. FIG. 6 is an explanatory view of a main part in a state where the retaining member is attached to the lever pin, and FIG. 7 is an exploded perspective view of the retaining member and the lever pin. The retaining member 15 of the present embodiment has a structure in which pressing portions 12h and 12h that are curved toward the lower side of the vehicle body are provided on the substrate portions 12a on both sides of the circumferential groove fitting recess 12b of the retaining member 12 of the first embodiment. When the base plate portion 12a is mounted in the circumferential groove 9c, the pressing portions 12h and 12h press the circumferential groove 9c in the direction in which the lever pin 9 is inserted, and the large-diameter head portion 9b that contacts the upper surface of the rotating piece 3e The play of the lever pin 9 is suppressed by the pressing force of the pressing portions 12h and 12h.

  8 and 9 show a fourth embodiment of the present invention, FIG. 8 is an explanatory view of a main part showing an operation lever mounting structure, and FIG. 9 is an exploded perspective view of a lever pin and a retaining member. The rotation restricting piece 12i of the retaining member 16 of the present embodiment extends from the opening end of the circumferential groove fitting recess 12b of the substrate portion 12a in the opening direction of the circumferential groove fitting recess 12b. The elastic piece 12j extends in the opening direction of the circumferential groove fitting recess 12b via a folded up piece 12k formed by folding the other side of the substrate portion 12a into a U shape.

  The anti-rotation protrusions 13d and 13e lock the rotation restricting piece 12i in a direction perpendicular to the axis of the hydraulic master cylinder when the operation lever 3 is not operated and in the direction of the tangent T2 inside the vehicle body of the pin insertion hole 3h. It is arranged at the position to make it. Further, the anti-rotation protrusion 13d has a width in the vehicle front-rear direction and inward and outward directions wider than that of the anti-rotation protrusion 13c, and gradually becomes thinner from the outside of the vehicle body to the inside, and the vehicle body inner portion faces the vehicle body inside. The guide surface 13f is formed so that the width gradually decreases.

  As shown in the imaginary line in FIG. 8, the mounting of the above-described retaining member 16 is performed by first inserting the circumferential groove fitting recess 12b into the circumferential groove 9c of the lever pin 9 with the elastic piece 12j facing the vehicle body rear side, The portion 12a is fitted into the circumferential groove 9c, and the elastic piece 12j is brought into contact with the shaft portion 9a on the front end side in the protruding direction. From this state, as shown by the arrow B, the rotation restricting piece 12i is rotated approximately 90 degrees forward of the vehicle body around the lever pin 9 and gets over the anti-rotation protrusion 13d and is engaged between the anti-rotation protrusions 13d and 13e. Match. By this engagement, the retaining member 16 is prevented from rotating, and the lever pin 9 is prevented from coming off, and the retaining member 16 is prevented from being detached by the vehicle body front side surface 5f of the switch mounting portion 5e. When the operation lever 3 is replaced, the rotation restricting piece 12i is turned approximately 90 degrees in the direction opposite to the arrow B over the rotation preventing projection 13d, and the substrate portion 12a is removed from the circumferential groove 9c. At the same time, the contact between the bullet piece 12 j and the shaft portion 9 a is released, and the retaining member 12 is removed from the lever pin 9.

FIG. 10 is an exploded perspective view of the lever pin and the retaining member showing the fifth embodiment of the present invention. The retaining member 17 of the present embodiment omits the folded up piece 12k of the retaining member 16 of the fourth embodiment, An elastic piece 12m is extended from one side of the rising piece 12c in the opening direction of the circumferential groove fitting recess 12b. FIG. 11 is an exploded perspective view of a lever pin and a retaining member showing a sixth embodiment of the present invention. The retaining member 18 of this embodiment is provided with a pair of rising pieces 12c, 12c, one of the rising pieces 12c is provided with a resilient piece 12m similar to that of the fifth embodiment, and the other rising piece 12c is provided. The lever pin 9 has a structure in which an elastic piece 12n that elastically contacts the peripheral surface of the shaft portion 9a on the front end side in the protruding direction is provided to face the elastic piece 12m, and a pair of elastic pieces 12m. , 12n elastically supports both side surfaces of the tip portion of the shaft portion 9a of the lever pin 9. I am doing it.

  12 and 13 show a seventh embodiment of the present invention, FIG. 12 is an explanatory view of a main part showing an operation lever mounting structure, and FIG. 13 is an exploded perspective view of a lever pin and a retaining member. The rotation restricting piece 12p of the retaining member 19 of the present embodiment extends from the opening end of the circumferential groove fitting recess 12b of the substrate portion 12a in a direction perpendicular to the opening direction of the circumferential groove fitting recess 12b, and extends to the tip. A knob 12q is provided. The elastic piece 12r extends in the opening direction of the circumferential groove fitting recess 12b via a folded up piece 12s formed by folding the other side of the substrate portion 12a into a U shape.

  Further, the anti-rotation protrusions 13g and 13h are provided in parallel with the axis of the hydraulic master cylinder 2 when the operation lever 3 is not operated, and the center line T3 between the opposing surfaces of the anti-rotation protrusions 13g and 13h is It arrange | positions from the center of the pin insertion hole 3g to the vehicle body rear part side. Further, the anti-rotation protrusion 13g located on the front side of the vehicle body is formed larger in the vehicle front-rear direction and the inside / outside direction of the vehicle body than the anti-rotation protrusion 13h located on the rear side of the vehicle body. A guide surface 13i is provided in which the end surface and the lower surface of the rotating piece 3f are continuous with an inclined surface.

  First, as shown in the imaginary line in FIG. 12, the above-described retaining member 19 is mounted with the circumferential groove fitting recess 12b from the grip portion 3b side in the state where the rotation restricting piece 12p protrudes forward of the vehicle body. 9 is inserted into the circumferential groove 9c, the base plate portion 12a is fitted into the circumferential groove 9c, and the elastic piece 12r is brought into contact with the shaft portion 9a on the distal end side in the protruding direction. From this state, as shown by an arrow C, the rotation restricting piece 12p is turned about 90 degrees inward of the vehicle body around the lever pin 9, and over the anti-rotation protrusion 13g, the rotation restricting piece 12p is turned. Engage between 13g and 13h. By this engagement, the retaining member 19 is prevented from rotating, the lever pin 9 is prevented from coming off, and the circumferential groove is retained by the engagement between the pair of rotation preventing projections 13g, 13h and both side edges of the rotation restricting piece 12p. The fitting concave portion 12b is prevented from moving in the direction of separating from the circumferential groove 9c.

  When exchanging the operation lever 3, the rotation restricting piece 12p is rotated approximately 90 degrees in the direction opposite to the arrow C over the rotation preventing projection 13g, and the substrate portion 12a is removed from the circumferential groove 9c. At the same time, the contact between the bullet 12 r and the shaft portion 9 a is released, and the retaining member 19 is removed from the lever pin 9.

  Further, the retaining member 19 of this embodiment is mounted by causing the rotation restricting piece 12p to protrude toward the inside of the vehicle body, inserting the circumferential groove fitting recess 12b into the circumferential groove 9c of the lever pin 9 from the front of the vehicle body, and mounting the substrate portion 12a. It may be fitted in the circumferential groove 9c so that the elastic piece 12r is brought into contact with the shaft portion 9a on the front end side in the protruding direction and the rotation restricting piece 12p is engaged between the rotation preventing projections 13g and 13h.

  FIG. 14 is an exploded perspective view of a lever pin and a retaining member showing an eighth embodiment of the present invention. The retaining member 20 of this embodiment omits the folded up piece 12s of the retaining member 19 of the seventh embodiment. The elastic piece 12t extends from one side of the base end 12d in the opening direction of the circumferential groove fitting recess 12b.

  FIG. 15 is an exploded perspective view of a lever pin and a retaining member showing a ninth embodiment of the present invention. The retaining member 21 of the present embodiment includes a pair of rising pieces 12c and 12c, and one rising piece 12c has a pair of rising pieces 12c and 12c. A resilient piece 12t similar to that of the eighth embodiment is provided, and a resilient piece 12u that resiliently contacts the peripheral surface of the shaft portion 9a on the leading end side in the protruding direction of the lever pin 9 is provided on the other rising piece 12c. The structure is provided so as to face the elastic piece 12t, and the pair of elastic pieces 12t and 12u elastically support both side surfaces of the tip portion of the shaft portion 9a of the lever pin 9.

  The lever mounting structure of the present invention is not limited to the above-described embodiments. A bifurcated lever bracket protrudes from the cylinder body, and one lever mounting portion of the lever bracket and the other lever mounting portion are connected to each other. Between them, a plate-shaped rotation base formed on the operation lever may be inserted, and a lever pin may be attached to the overlapping part of the lever mounting portion and the rotation base to attach the operation lever to the lever bracket, In this case, the anti-rotation protrusion is formed on the lever bracket from which one end portion including the peripheral groove of the lever pin protrudes. Further, both the lever bracket and the rotating base may be formed in a plate shape and overlapped. What is necessary is just to provide a rotation prevention protrusion in any one of the lever bracket from which the one end part of the said lever pin protrudes, and a rotation base. Further, the lever mounting structure of the present invention is not limited to being applied to a hydraulic master cylinder device for a front brake, but can also be applied to a hydraulic master cylinder device for a clutch.

It is principal part explanatory drawing which shows the operation lever attachment structure which shows the 1st example of this invention. It is II-II sectional drawing of FIG. It is a partial cross section side view of a hydraulic master cylinder device similarly. It is an exploded perspective view of a lever pin and a retaining member in the same manner. It is a disassembled perspective view of the lever pin and securing member which shows the 2nd example of the present invention. It is principal part explanatory drawing of the state which mounted | wore the lever pin with the securing member which shows the 3rd example of this invention. Similarly, it is an exploded perspective view of a retaining member and a lever pin. It is principal part explanatory drawing which shows the operation lever attachment structure which shows the 4th example of this invention. FIG. 6 is an exploded perspective view of the lever focus and the retaining member. It is a disassembled perspective view of the lever pin and retaining member which shows the 5th example of this invention. It is a disassembled perspective view of the lever pin and securing member which shows the 6th form example of this invention. It is principal part explanatory drawing which shows the operation lever attachment structure which shows the 7th example of this invention. It is an exploded perspective view of a lever pin and a retaining member in the same manner. It is a disassembled perspective view of the lever pin and retaining member which similarly shows the 8th form example of this invention. It is a disassembled perspective view of the lever pin and retaining member which similarly shows the 9th form example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Hydraulic master cylinder apparatus, 2 ... Hydraulic master cylinder, 3 ... Operation lever, 3a ... Turning base, 3b ... Grip part, 3c ... Working arm, 3d ... Switch actuator, 3e, 3f ... Turning piece, 3g, 3h ... pin insertion hole, 4 ... handlebar, 5 ... cylinder body, 5a ... reservoir, 5b ... vehicle body mounting bracket, 5c ... lever bracket, 5d ... pin insertion hole, 5e ... switch mounting portion, 5f ... front side of vehicle body 6 ... Holder, 7 ... Accelerator grip, 8 ... Handlebar, 9 ... Lever pin, 9a ... Shaft, 9b ... Large diameter head, 9c ... Circumferential groove, 10 ... Brake lamp switch, 11 ... Bolt, 12 ... Stopping member , 12a ... substrate portion, 12b ... circumferential groove fitting recess, 12c ... upright piece, 12d, 12g, 12j, 12m, 12n, 12r, 12t ... bullet piece, 12e, 12i, 12p ... rotation restricting piece 12f, 12q ... knob part, 12h ... pressing part, 12k, 12s ... folded up piece, 13a, 13b, 13d, 13e, 13g, 13h ... detent protrusion, 13c, 13f, 13i ... guide surface, 14, 15, 16, 17, 18, 19, 20, 21 ... retaining member

Claims (8)

The lever mounting part of the lever bracket protruding from the cylinder body of the hydraulic master cylinder and the rotating base part of the operating lever are overlapped, and a pin insertion hole is formed through the overlapping part of the rotating base part and the lever mounting part In the operation lever mounting structure of the hydraulic master cylinder device in which the operation lever is rotatably attached to the lever bracket by mounting the lever pin inserted into the pin insertion hole while preventing the lever pin from coming off.
The lever pin includes a shaft portion that is inserted into the pin insertion hole, a large-diameter head that is provided at one end of the shaft portion and is in contact with one side surface of the overlapping portion, and the protrusion protruding from the other side surface of the overlapping portion. A circumferential groove provided in a protruding base portion of the shaft portion, and the retaining member is U-shaped by opening a substrate portion having a surface parallel to the other side surface of the overlapping portion and one side of the substrate portion. A circumferential groove fitting recess formed on the substrate portion, a rising piece bent in a direction perpendicular to the substrate portion from the other side of the substrate portion, and the circumferential groove fitting recess and the circumference extending from the rising piece. A resilient piece that elastically contacts the circumferential surface of the shaft portion on the distal side in the protruding direction from the circumferential groove when the groove is fitted, and extends from the substrate portion in a direction parallel to the substrate portion. A pair of detents, each of which is provided with a rotation restricting piece, and both side edges of the rotation restricting piece engage with the other side surface of the overlapping portion to prevent the retaining member from rotating. In the state where the protrusion is provided, the circumferential groove fitting recess and the circumferential groove are fitted, and the rotation restricting piece is locked to the anti-rotation protrusion, When the circumferential groove fitting recess moves in a direction away from the circumferential groove at a position facing the other side of the substrate portion, the other side of the substrate portion comes into contact with the circumferential groove fitting recess. An operation lever mounting structure for a hydraulic master cylinder device, characterized in that a release prevention protrusion is provided for preventing the release from the circumferential groove. The lever mounting part of the lever bracket protruding from the cylinder body of the hydraulic master cylinder and the rotating base part of the operating lever are overlapped, and a pin insertion hole is formed through the overlapping part of the rotating base part and the lever mounting part In the operation lever mounting structure of the hydraulic master cylinder device in which the operation lever is rotatably attached to the lever bracket by mounting the lever pin inserted into the pin insertion hole while preventing the lever pin from coming off.
The lever pin includes a shaft portion that is inserted into the pin insertion hole, a large-diameter head that is provided at one end of the shaft portion and is in contact with one side surface of the overlapping portion, and the protrusion protruding from the other side surface of the overlapping portion. A circumferential groove provided in a protruding base portion of the shaft portion, and the retaining member is U-shaped by opening a substrate portion having a surface parallel to the other side surface of the overlapping portion and one side of the substrate portion. A circumferential groove fitting recess formed on the substrate portion, a rising piece bent in a direction perpendicular to the substrate portion from the other side of the substrate portion, and the circumferential groove fitting recess and the circumference extending from the rising piece. A resilient piece that elastically contacts the circumferential surface of the shaft portion on the distal side in the protruding direction from the circumferential groove when the groove is fitted, and extends from the substrate portion in a direction parallel to the substrate portion. A pair of detents, each of which is provided with a rotation restricting piece, and both side edges of the rotation restricting piece engage with the other side surface of the overlapping portion to prevent the retaining member from rotating. A pair of anti-rotation projections in a state in which the protrusion is protruded, the circumferential groove fitting recess and the circumferential groove are fitted, and the rotation restricting piece is locked to the anti-rotation projection. An operation lever mounting structure for a hydraulic master cylinder device, wherein the circumferential groove fitting recess prevents the circumferential groove fitting recess from moving away from the circumferential groove by locking with both side edges of the rotation restricting piece. 3. The hydraulic master cylinder device according to claim 1, wherein the rotation restricting piece extends from the other side of the substrate portion in a direction orthogonal to an opening direction of the circumferential groove fitting recess. Operation lever mounting structure. The said rotation control piece is extended in the same direction as the opening direction of the said circumferential groove fitting recessed part from the opening part front-end | tip of the said circumferential groove fitting recessed part of the said board | substrate part. The operation lever mounting structure of the hydraulic master cylinder device. The rotation restricting piece extends from a front end of the circumferential groove fitting recess of the substrate portion in a direction orthogonal to the opening direction of the circumferential groove fitting recess. The operation lever mounting structure of the hydraulic master cylinder device described. The operating lever mounting structure for a hydraulic master cylinder device according to any one of claims 1 to 5, wherein the rotation restricting piece includes a knob formed by bending the tip. 7. The operation lever mounting structure for a hydraulic master cylinder device according to claim 1, wherein the substrate portion includes a pressing portion that presses the circumferential groove in a direction in which a lever pin is inserted. . 8. The operation lever mounting structure for a hydraulic master cylinder device for a vehicle according to claim 1, wherein the retaining member is formed by cutting and bending a single plate-like member. .

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