JPH08177847A - Supporting structure of turning lever - Google Patents

Abstract

PURPOSE: To easily assembe a turning lever to lever holders in an easy operation by disusing screwing which takes much time when the turning lever is assembled so that a turning lever assembling condition can be surely retained. CONSTITUTION: A pivot 8 consists of a pair of pivot members 13, 14 equipped with cylindrical parts 13a, 14a which are fitted therein/therearound and shaft parts 13c, 14c projected from the bottom walls 13b, 14b of the cylindrical parts 13a, 14a. A helical spring is compressively arranged between the bottom walls 13b, 14b so that the pivot members 13, 14 are elastically pressed in the extending direction thereof, and the shaft parts 13v, 14c are protrusively fitted in pivot holes 10, 10 of lever holders 4b, 4c. An engagement projecting part 14d is arranged in the inside cylindrical part 14a, and an engagement step part 13c and an insert groove 13e are arranged in the outside cylindrical part 13a. Both end parts of the helical spring are locked in the pivot members 13, 14, and the engagement projecting part 14d and the insert groove 13e are displaced in a circumferential direction by the torsional force of the helical spring.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a motorcycle, a tricycle and a tricycle.
Various turning levers are used, including the operating levers that actuate the brakes and clutches of four-wheel buggy cars and automobiles by the driver's grip operation, and the pedal levers of the operating pedals that actuate these brakes and clutches by stepping on them. The present invention relates to a support structure for a pivot lever that pivotally supports a pair of lever holders by using a pivot.

[0002]

2. Description of the Related Art As a general support structure for an operating lever for operating a brake or a clutch of a motorcycle or the like, there is, for example, the one disclosed in Japanese Utility Model Publication No. 3-57591. With this support structure, the mounting base of the operating lever is inserted between two parallel lever holders that project substantially horizontally from the cylinder body of the hydraulic master cylinder, and the pivot is inserted through the mounting base and the upper lever holder. Then, a male screw at the tip of the pivot is screwed to the lower lever holder and the fixing nut to pivotally support the operation lever.

[0003]

In such a construction, the male screw of the pivot end is once screwed into the lower lever holder, and then the pivot is further projected to the lower surface of the lower lever holder. This requires two times of screwing, in which a fixing nut is screwed onto the male screw, and moreover, the screwing itself is time-consuming, and assembly work is complicated and troublesome. Further, the lower lever holder has to be formed with a highly accurate reaming process or tapping to form a female screw hole, which is disadvantageous in terms of workability and cost.

In view of this, the present invention eliminates the time-consuming screwing of the rotary lever so that the rotary lever can be easily assembled to the lever holder with one touch, and the rotary lever is assembled. It is an object of the present invention to provide a support structure for a rotating lever that can securely hold the.

[0005]

In order to achieve the above-mentioned object, the present invention inserts a mounting base of a rotary lever between two parallel lever holders, and the mounting base and both lever holders are connected to each other. In a support structure of a rotating lever that pivotally supports the rotating lever by inserting a pivot into
The pivot is configured by a pair of pivot members including a tubular portion fitted inside and outside the turning hole of the mounting base, and a shaft portion protruding outward from a bottom wall of each tubular portion. , A spiral spring is contracted between the bottom walls of both tubular parts to elastically urge both pivot members in the extension direction, and the shaft parts of the respective pivot members are fitted into the pivot holes of the lever holders and An engagement protrusion is provided on the tubular portion of the pivot member, and the engagement protrusion of the one pivot member is housed in the tubular portion of the other pivot member when the pivot is assembled, and both the pivot members are reduced. Insertion grooves for accommodating the respective shafts in the rotation holes of the mounting base are provided by opening the tip end surface of the other tubular portion, and both end portions of the spiral spring are attached. It is locked to both of the pivot members and the torsion force of the spiral spring is used. It is characterized in that allowed deviations and insertion groove of the other of the pivot member and the engaging projection of the one of the pivot member in the circumferential direction.

[0006]

The pivot is inserted into the pivot hole by fitting the tubular portion of the pivot member inside and outside the pivot lever before being assembled to the lever holder. In this inserted state, the shaft portion of the pivot member projects from the pivot hole of the pivot lever by the elastic force of the spiral spring, and both pivot members are reversed in the circumferential direction by the torsion force of the spiral spring. The engagement protrusion and the insertion groove are biased and are displaced in the circumferential direction.

When the above-mentioned rotary lever is assembled to the lever holder, both pivot members are rotated against the torsion force of the spiral spring, and the engaging projection of one pivot member and the other After aligning with the insertion groove of the pivot member, insert the engaging protrusion into the insertion groove while pressing the pivot member in the compression direction against the elastic force of the spiral spring, With the shaft accommodated in the turning hole of the turning lever, the turning lever is inserted between the lever holders.

When the shaft portion of the pivot member is aligned with the pivot hole of the lever holder, the pivot member released from the pressing force of the lever holder moves in the extending direction by the elastic force of the spiral spring, and each pivot member moves. The shaft portion of the member projects into and fits into the pivot hole of the lever holder. At the same time, the engaging projections come out of the insertion grooves, and both pivot members rotate in opposite directions by the torsion force of the spiral spring, so that the engaging projections and the insertion grooves are displaced in the circumferential direction. Then, the rotation lever is rotatably supported by the lever holder.

In the assembled state of the rotating lever, the engaging projection of one pivot member is displaced in the circumferential direction from the insertion groove of the other pivot member by the torsion force of the spiral spring, so that the lever is displaced. Even if an external force may be applied to the shaft portion of the pivot member protrudingly fitted into the pivot hole of the holder, the engaging protrusion of one pivot member abuts the tubular portion of the other pivot member. The movement of the reduction of is regulated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the turning lever of the present invention is applied to a brake lever for a front disc brake of a bar handle vehicle such as a motorcycle will be described below with reference to FIGS. A hydraulic pressure master cylinder device 3 is attached to a handlebar 1 that steers the front wheels at the front part of the vehicle body of a bar-handle vehicle, inside the accelerator grip 2 at the right end. This hydraulic master cylinder device 3 is a hydraulic master cylinder arranged on the front side of the vehicle body of the handlebar 1 by connecting a vehicle body mounting arm 4a enclosing the handlebar 1 and a bracket 5 with a fixing bolt 6. 4 and mounting base 7a
Is sandwiched between the lever holders 4b and 4c of the hydraulic master cylinder 4, and the brake lever 7 is pivotally mounted by a pivot 8. When the brake lever 7 is gripped and operated, the action of the brake lever 7 is exerted. The arm 7b pushes the piston 9 of the hydraulic master cylinder 4 inward to pressurize the hydraulic fluid in the hydraulic master cylinder 4, and supply the boosted hydraulic fluid to the front disc brakes arranged close to the front wheels. Then, the front wheels are braked by hydraulically operating.

The lever holders 4b and 4c are arranged on the right side of the front part of the hydraulic master cylinder 4 from the right side to the upper and lower sides of the brake lever 7 and
Of the mounting base portion 7a is provided with a space substantially equal to that of the mounting base portion 7a, and the lever holders 4b and 4c are provided with small-diameter pivot holes 10 and 10 coaxially.
On the outer peripheral edge of the inner surface, tapered guide surfaces 11, 11 are provided so as to face each other.

The brake lever 7 has the above-mentioned mounting base portion 7.
a and an operating arm 7b, a grip portion 7c of the accelerator grip 2 extending toward the front side of the vehicle body, and a brake switch operating piece 7d protruding from the mounting base portion 7a to the front side of the hydraulic master cylinder 4 toward the vehicle body. The attachment base 7a is thicker than the other working arms 7b and the grip 7c. Inside the attachment base 7a, there is a large-diameter rotation hole 12a that opens to the upper surface of the attachment base 7a, and similarly, the attachment base 7a has a larger diameter. Large-diameter turning hole 12a, which is continuous with small-diameter turning hole 12b opening on the lower surface
Is larger in diameter than the pivot holes 10 of the lever holders 4b and 4c, and is formed so as to occupy most of the thickness of the mounting base portion 7a. Further, the small diameter turning hole 12b is left at the lower end of the large diameter turning hole 12a. The flange 12c is formed at the center with the same diameter as the pivot hole 10, and the pivot 8 is assembled in the pivot holes 12a and 12b.

The pivot 8 is a cylindrical portion 13 fitted inside and outside the large diameter rotation hole 12a of the brake lever 7.
a, 14a and the bottom walls 13b of the tubular portions 13a, 14a,
Shaft portions 13c, 1 projecting outward from 14b and protrudingly fitted into the pivot holes 10, 10 of the lever holders 4b, 4c.
4c and a pair of upper and lower pivot members 13 and 14.

The tubular portion 13a of the upper pivot member 13 is formed to have a larger diameter than the tubular portion 14a of the lower pivot member 14, and when the tubular portion 14a is fitted into and out of the tubular portion 14a, the tubular portion 1 is formed.
It has a length capable of accommodating substantially the entire length of 4a. Further, the locking step portion 13d is provided on the tubular portion 13a of the upper pivot member 13.
And an insertion groove 13e which is continuous with one side of the locking step portion 13d and extends in the direction of the bottom wall 13b, is provided at the tip end surface of the tubular portion 13a so as to open. An engagement protrusion 14d that engages with and disengages from the locking step 13d and the insertion groove 13e is provided on the shape portion 14a so as to protrude outward. On the end faces of the shaft portions 13c, 14c, tool hanging grooves 13f,
14e is formed, and a tool such as a screwdriver can be inserted into the grooves 13f and 14e to rotate the pivot members 13 and 14, respectively.

Bottom walls 13b, 14 of the tubular portions 13a, 14a
A spiral spring 15 is contracted between b and elastically urges both pivot members 13 and 14 in the extending direction. The pivot 8 is provided on the brake lever 7 before being attached to the lever holders 4b and 4c, on the tubular portions 13a of the pivot members 13 and 14,
14a is fitted inside and outside and is inserted into the large diameter rotation hole 12a,
The bottom wall 14b of the lower pivot member 14 is supported by the flange 12c, and the upper pivot member 13 is pushed against the resilience of the spiral spring 15, while the bottom wall 13b is inserted into the opening of the large-diameter rotation hole 12a. The circlip 16 attached to the brake lever 7 is used to prevent the shaft portions 13c and 14c from protruding from the rotation holes 12a and 12b, and are attached to the brake lever 7 in advance.

Further, the spiral spring 15 has two end portions 15a,
15b is the bottom wall 13b, 14b of the pivot member 13, 14
The pivot members 13 and 14 are urged in opposite directions to each other in the circumferential direction by the torsional force of the spiral spring 15, and further the rotation amount of the pivot members 13 and 14 is locked. It is regulated by the contact between the step portion 13d and the engaging protrusion 14d. In the above-described state in which the locking step portion 13d and the engagement projection portion 14d are in contact with each other in the circumferential direction, the engagement projection portion 14d and the insertion groove 13e are displaced in the circumferential direction, and the rotation hole 12 is formed.
When an external force in the pushing direction acts on the shaft portions 13c and 14c of the pivot members 13 and 14 protruding from a and 12b, the locking step portion 13d and the engaging projection portion 14d come into axial contact with each other,
The movement of the pivot members 13 and 14 in the contraction direction is restricted.

Brake lever 7 fitted with a pivot 8
Rotates the pivot members 13 and 14 against the torsion force of the spiral spring 15, aligns the insertion groove 13e of the upper pivot member 13 and the engaging protrusion 14d of the lower pivot member 14, and then pivots the pivot members. While pushing the members 13, 14 against the elastic force of the spiral spring 15 in the compression direction, the engaging protrusion 14d is inserted into the insertion groove 13e, and the shaft portions 13c, 14c of the pivot members 13, 14 are inserted. The brake lever 7 is inserted into the space between the lever holders 4b and 4c while being housed in both the rotation holes 12a and 12b.

The shaft portion 1 of the pivot members 13 and 14
3c and 14c are the pivot holes 1 of the lever holders 4b and 4c.
When aligned with 0 and 10, the lever holders 4b and 4b
The pivot members 13 and 14 released from the pressing force of c move in the extending direction by the elastic force of the spiral spring 15, and the shaft portions 13c and 14c project into and fit into the pivot holes 10 and 10 of the lever holders 4b and 4c. The brake lever 7 is rotatably attached to the lever holders 4b and 4c. Further, the engaging projection 14d comes out of the insertion groove 13e by the movement of the pivot members 13 and 14 in the extension direction, and both pivot members 13 and 14 rotate in the opposite direction in the circumferential direction by the torsion force of the spiral spring 15. Then, the rotation of the pivot members 13, 14 is stopped by the contact between the locking stepped portion 13d and the engaging projection 14d, and the engaging projection 14d and the insertion groove 13e are displaced in the circumferential direction (Fig. 1, Fig. 2).

In the assembled state of the brake lever 7, the engaging protrusion 14d of the lower pivot member 14 is engaged with the spiral spring 15
Due to the torsional force of the upper pivot member 13 is displaced from the insertion groove 13e of the upper pivot member 13 in the circumferential direction, an external force is pushed into the shaft portions 13c and 14c protrudingly fitted into the pivot holes 10 and 10 of the lever holders 4b and 4c. In this case, the engaging projection 14d comes into axial contact with the locking step 13d, and the movement of the pivot members 13, 14 in the contracting direction is restricted.

In this embodiment, while pushing both pivot members 13 and 14 of the pivot 8 in the contracting direction, the mounting base portion 7a of the brake lever 7 is inserted between the lever holders 4b and 4c, and the pivot members 13 and 14 are inserted. 14 shaft portions 13c,
14c to the pivot holes 10, 1 of the lever holders 4b, 4c
The brake lever 7 can be pivotally supported only by adjusting the position to 0. Compared with the conventional structure in which the pivot is double screwed, the assembling work can be performed in a short time and easily. Since there is no need for highly accurate reaming or tapping, workability and economic efficiency are extremely high.

Further, the shaft portion 13 of the pivot members 13 and 14
The pivot 8 does not come off just by pushing the c and 14c, and even when the brake lever 7 is intentionally removed, the removal tools are inserted into both the tool engaging grooves 13f and 14e, and both the pivots are pivoted. The brake lever 7 cannot be removed unless the members 13, 14 are rotated against the torsion force of the spiral spring 15 and the pivot members 13, 14 are pushed in the contracting direction. Despite its simple assembly, it is highly reliable as a spindle structure. Further, due to such a retaining structure, the elastic force of the spiral spring 15 can be small, and the force for pushing the pivot members 13, 14 at the time of assembling the brake lever 7 can be small. The property can be further improved.

The large-diameter turning hole 12 of the brake lever 7 is also provided.
The cylindrical portions 13a, 14a of the pivot members 13, 14 within a
Since the large diameter rotation hole 12a and the outer cylindrical portion 13a can be brought into contact with each other over a long area in the vertical direction, the brake lever 7 can be prevented from tilting or rattling as much as possible. it can.

The locking step portion 13d and the engaging projection portion 14 of this embodiment
d may be set at the axial contact position shown in FIGS. 1 and 2 so that the torsion force of the spiral spring 15 disappears. FIG. 5 shows another embodiment to which such a technical idea is applied, which has a structure in which the locking step portion of the upper pivot member used in the above embodiment is omitted.

The shaft portions 13c and 14c are connected to the lever holder 4b,
When the pivot members 13 and 14 are fitted into the pivot holes 10 and 10 of 4c in a protruding manner, the pivot members 13 and 14 rotate in the opposite direction in the circumferential direction by the torsion force of the spiral spring 15, and the torsion force of the spiral spring 15 disappears. Thus, the insertion groove 13e and the engaging projection 14d are displaced in the circumferential direction, and the engaging projection 14d
However, it is stopped at an arbitrary position slightly downward from the tip of the tubular portion 13a of the upper pivot member 13.

In the present embodiment, the amount of rotation of the pivot members 13 and 14 urged by the torsion force of the spiral spring 15 is not positively restricted, but the pivot members 13 and 14 are at arbitrary positions due to the disappearance of the torsion force. In the stopped state, the insertion groove 13e and the engaging projection 14d are displaced in the circumferential direction. Therefore, the effect of preventing the pivot 8 from coming off with respect to an external force and the means and effect for removing the brake lever 7 are the same as those described above. Similar to the example.

In both of the embodiments, in order to mount the pivot in advance on the brake lever before assembly, the turning hole of the brake lever has a two-step structure of a large diameter and a small diameter, and a flange outside the small diameter turning hole is provided. The pivot was prevented from coming off with the circlip attached to the opening of the large diameter turning hole, but the turning hole was formed straight and the circlip was attached to both openings of the turning hole. It does not matter if the pivot is prevented from coming off, or the pivot is simply inserted into the straight rotation hole.

Further, the locking step portion is provided so as to project inward from the outer cylindrical portion, or the locking step portion and the engaging projection portion are provided in the inner and outer cylindrical portions in the opposite relationship to the above-mentioned embodiment. Alternatively, a plurality of sets of locking steps and engaging projections may be set.
Further, the present invention can be widely applied as a support structure for a brake lever and a clutch lever of a vehicle, a pedal lever of a brake pedal and a clutch pedal, and various other rotating levers such as a crank lever and a link lever. .

[0028]

As described above, according to the present invention, the cylindrical portions fitted inside and outside inside the turning hole of the mounting base of the brake lever, and the cylindrical wall protruding outward from the bottom wall of each cylindrical portion. A pivot is configured with a pair of pivot members having a shaft portion, and a spiral spring is contracted between the bottom walls of both tubular portions to elastically eject both pivot members in the extension direction, and the shaft portion of each pivot member is The protruding projection is fitted in the pivot hole of the lever holder, and the engaging protrusion is provided on the tubular portion of the one pivot member, and the tubular portion of the other pivot member is provided with the one pivot member at the time of assembling the pivot. Of the other cylindrical portion, the insertion groove for accommodating the engaging projection portion of the other pivot member, allowing the movement of both pivot members in the contraction direction, and accommodating the respective shaft portions in the rotation holes of the mounting base portion. Both ends of the spiral spring are provided by opening at the both pivot parts. And the torsional force of the spiral spring causes the engaging protrusion of the one pivot member and the insertion groove of the other pivot member to be displaced in the circumferential direction. The rotation lever can be assembled simply by inserting the mounting base between the lever holders and aligning the shaft part of the pivot member with the pivot hole of the lever holder, and the pivot is double screwed. Compared with the conventional structure, not only the assembly work can be performed in a short time and extremely easily, but also highly accurate reaming and tapping are not required, so the workability and the economical efficiency are very high. .

Further, pushing the shaft portion of the pivot member does not cause the pivot to come off, and even when the pivot lever is intentionally removed, both pivot members resist the torsion force of the spiral spring. Since it can be removed unless the pivot member is pivoted and the pivot member is pushed in the contraction direction, the pivot lever has a high reliability as a pivot shaft structure in spite of easy assembly. Furthermore, with such a retaining structure, the elastic force of the spiral spring can be small, and the force of pushing the pivot member when assembling the turning lever is small, which further improves the assembling performance. can do.

Further, since the tubular portion of the pivot member is superposed inward and outward in the turning hole of the turning lever, the turning hole and the outer tubular portion can be brought into contact with each other over a long area, It is possible to hold the turning lever well and to prevent the tilt and rattling of the turning lever as small as possible.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG.

FIG. 3 is a plan view of a hydraulic master cylinder device showing an embodiment in which the present invention is applied to a front disc brake of a bar handle vehicle.

FIG. 4 is an exploded perspective view of a pivot and a spiral spring used in an embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts showing another embodiment of the present invention.

[Explanation of symbols]

1 ... Handle bar 2 ... Axel grip 3 ... Hydraulic pressure master cylinder device 4 ... Hydraulic pressure master cylinder 4b, 4c ... Lever holder integrated with the hydraulic pressure master cylinder 7 ... Brake lever 7a ... Brake lever 7 mounting base 7b ... Brake Action arm 7c of lever 7 ... Grip part of the brake lever 8 ... Pivot 10 ... Pivot hole 11 ... Guide surface 12a ... Large diameter rotation hole 12b ... Small diameter rotation hole 12c ... Flange 13 ... Upper pivot member 14 ... Lower pivot member 13a, 14a ... Cylindrical portions 13b, 14b of the pivot members 13, 14 ... Bottom walls 13c, 14c of the tubular portions 13a, 14a ... Shaft portions 13d of the pivot members 13, 14 ... Locking step portions 13e of the pivot member 13 ... Insertion grooves 13f, 14e of the pivot member 13 ... Tool hooking grooves of the pivot members 13, 14 14d ... Pivot Engaging projection 15 ... helical spring 15a of timber 14, the end portion 16 ... circlip 15b ... helical spring 15

Claims (1)

[Claims] 1. A pivot lever is pivotable by inserting a mounting base of a pivot lever between two parallel lever holders and inserting a pivot between the pivot base and both lever holders. In the support structure of the pivoting lever that supports the shaft,
The pivot is configured by a pair of pivot members including a tubular portion fitted inside and outside the turning hole of the mounting base, and a shaft portion protruding outward from a bottom wall of each tubular portion. , A spiral spring is contracted between the bottom walls of both tubular parts to elastically urge both pivot members in the extension direction, and the shaft parts of the respective pivot members are fitted into the pivot holes of the lever holders and An engagement protrusion is provided on the tubular portion of the pivot member, and the engagement protrusion of the one pivot member is housed in the tubular portion of the other pivot member when the pivot is assembled, and both the pivot members are reduced. Insertion grooves for accommodating the respective shafts in the rotation holes of the mounting base are provided by opening the tip end surface of the other tubular portion, and both end portions of the spiral spring are attached. It is locked to both of the pivot members and the torsion force of the spiral spring is used. The support structure of pivoting levers, characterized in that allowed deviations and insertion groove of the other of the pivot member and the engaging projection of the one of the pivot member in the circumferential direction.