JPH08177848A - Supporting structure of turning lever - Google Patents

Abstract

PURPOSE: To easily assemble a turning lever to a lever holder with a simple structure, and improve workability and economy by eliminating a pulling out preventing member such as a fixing nut, a split pin. CONSTITUTION: A large diametral pivot hole 11 is opened to an upper lever holder 4b. A small pivot hole 12 is coaxially opened to a lower holder 4c with the large diametral pivot hole 11, and insertion recessed parts 13, 13a oppositely arranged along the small diametral pivot hole 12. Fitting recessed parts 14, 14 are formed outside the small diametral pivot hole 12 on the lower surface of the lower lever holder 4c. A large diametral shaft part 8a extendedly interpolated between the large diametral pivpot hole 11 and a rotary hole 10 and a small diametral shaft part 8b extendedly interpolated between the rotary hole 10 and the small diametral pivot hole 12, are arranged to a pivot 8. Fitting projecting parts 8c, 8c fitted in the fitting recessed parts 14, 14 through the insert recessed part 13, are arrangted at the end side part of the small diametral shaft part 8b. A helical spring 15 is compressively arranged between the end surface of the large diametral shaft part 8a and the upper surface of the lower lever holder 4c.

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 of an operating lever for activating a brake or a clutch of a motorcycle or the like, there is, for example, the one disclosed in Japanese Utility Model Publication 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.

Further, in Japanese Utility Model Laid-Open No. 56-72918, a mounting base of a rotating lever is inserted between two parallel lever holders, and a spiral spring is externally attached to the pivot, and the spiral spring is pivoted. While compressing between the head flange and the one lever holder, insert the pivots into both lever holders and the mounting base of the rotating lever, and prevent the tip of the pivots from slipping off with the cotter pin. A structure is shown in which a rotating lever is pivotally supported while being elastically urged toward the insertion side by a spiral spring.

[0004]

However, in the former support structure, the male screw of the pivot tip is once screwed into the lower lever holder, and then the pivot of the pivot is further projected to the lower surface of the lower lever holder. This requires a double screwing operation of screwing a fixing nut to the screw, and the assembling work is complicated and troublesome. Also,
The lower lever holder must 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.

On the other hand, in the latter support structure, the head flange of the pivot and the spiral spring are projected to the outside of the lever holder, and further, the elastic force of the spiral spring causes the split pin at the tip to move. Since it is pushed back to the insertion side to the position where it abuts the outer surface of the lever holder, the amount of overhang becomes even larger and it is difficult to apply if there is not enough mounting space.

Further, in any case, since the pivot is used in combination with a retaining member such as a fixing nut or a split pin, it is necessary to perform a two-handed work, and it is expected to be more difficult to assemble in a place where it is difficult to see visually. .

Therefore, the present invention provides a support structure of a rotating lever which requires a small mounting space and can be easily assembled with one touch without using a retaining member such as a fixing nut or a split pin. Is intended.

[0008]

In order to achieve the above-mentioned object, the present invention inserts a mounting base of a rotating lever between two parallel first lever holders and second lever holders. In a supporting structure of a rotating lever that pivotally supports the rotating lever by inserting a pivot into the mounting base and both of the lever holders, the first lever holder has a rotating hole of the mounting base. Drill a large pin hole of the same diameter,
A small-diameter pivot hole is bored in the second lever holder coaxially with the large-diameter pivot hole, and the pivot is provided in the pivot over the large-diameter pivot hole of the first lever holder and the rotation hole of the mounting base. The large-diameter shaft portion to be inserted, the rotation hole of the attachment base portion, and the second hole continuously to the tip of the large-diameter shaft portion.
A small-diameter shaft portion that is inserted so as to straddle the small-diameter pivot hole of the lever holder is provided, and a fitting protrusion is formed in one of the small-diameter shaft portion and the small-diameter pivot hole of the second lever holder, and the other is formed in the other. A fitting recess for engaging the projection and the recess with the fitting projection to prevent the pivot from coming off and an insertion recess for allowing the fitting projection to be inserted are provided, and the second lever holder and the large-diameter shaft portion of the pivot are provided. An elastic material that elastically repels the pivot that is prevented from coming off by the concavo-convex fitting of the fitting projection and the fitting recess is provided between and.

Further, as another structure of the present invention, a mounting base portion of the rotating lever is inserted between the two parallel first and second lever holders, and the mounting base portion and both of the lever holders are inserted. In a support structure of a rotating lever that pivotally supports the rotating lever by inserting a pivot into and, a large-diameter pivot hole having the same diameter as the rotating hole of the mounting base is formed in the first lever holder. The second lever holder is provided with a small-diameter pivot hole coaxially with the large-diameter pivot hole, and the pivot is provided with the large-diameter pivot hole of the first lever holder and the pivot hole of the mounting base. And a large-diameter shaft portion that is inserted over and between the large-diameter shaft portion and the distal end surface of the large-diameter shaft portion, and is inserted over the rotation hole of the mounting base portion and the small-diameter pivot hole of the second lever holder. Small-diameter shank and side projection of the small-diameter shank And a fitting recess that is open to the outer surface of the guide projection and the large-diameter shaft portion side. The fitting protrusion is inserted into the second lever holder outside the small-diameter pivot hole. And a fitting recess that protrudes from the inner surface of the fitting recess and that fits with the fitting projection to concavo-convex to prevent the pivot from coming off, and a large diameter of the second lever holder and the pivot. An elastic member that elastically repels the pivot, which is prevented from coming off by the concave-convex fitting of the fitting projection and the fitting recess, between the shaft portion and the first lever holder.

The elastic material includes a compression spring such as a spiral spring, a cylindrical sponge, rubber, soft synthetic resin and the like. The elastic material is used as a spiral spring, one end of the spiral spring is locked to the pivot, and the other end is locked to the second lever holder to generate a torsion force in the spiral spring. It is preferable to rotate the pivot so that the fitting protrusion of the pivot matches the fitting recess of the second lever holder.

Further, the base end surface of the large-diameter shaft portion of the pivot is located in the large-diameter pivot hole of the first lever holder,
It is desirable to attach a protective cap to the large diameter pivot hole of the first lever holder.

[0012]

In the above structure, the pivot lever mounting base is inserted between both lever holders, and the pivot lever pivot holes are aligned with the large pivot holes and the small pivot holes of both lever holders. , The pivot from the small diameter shaft side to the first
Insert it from the outside of the lever holder into the large diameter pivot hole and then into the rotation hole of the rotation lever. When the small-diameter shaft portion of the pivot is inserted into the small-diameter pivot hole of the second lever holder while inserting the fitting protrusion into the insertion recess, the elastic member is gradually compressed and the fitting protrusion is inserted into the insertion recess. After passing, the pivot is rotated to fit the fitting projection and the fitting recess into the concave and convex.

By this assembly, the first member is made by the elastic member.
The pivot that is elastically ejected toward the lever holder is prevented from coming off by the concave and convex fitting of the fitting projection and the fitting concave, and the circumferential rotation is similarly restricted by the convex and concave fitting. The large-diameter shaft portion of the pivot is located across the large-diameter pivot hole of the first lever holder and the rotation hole of the rotation lever, and the brake lever is rotatably supported by the large-diameter shaft portion. ,
The small diameter shaft portion is located across the rotation hole of the rotation lever and the small diameter pivot hole of the second lever holder.

When a helical spring is used as the elastic member and the torsion force of the helical spring is applied to the pivot so that the fitting protrusion of the pivot and the fitting recess of the second lever holder are aligned with each other, the pivot receives an external force. Even if the fitting protrusion may come out of the fitting recess by being hit in the direction of the second lever holder,
Since the fitting protrusion does not rotate into the insertion recess, the pivot does not come off.

Further, when the large-diameter shaft portion of the pivot is housed in the large-diameter pivot hole of the first lever holder, the pivot does not project to the outer surface of the first lever holder, so that an external force acts on the outer surface of the first lever holder. However, the pivot will not be hit in the direction of the second lever holder. Furthermore, the first
By covering the large-diameter pivot hole of the lever holder with the protective cap, the protective cap protects the pivot from external force, and dust and rainwater do not enter around the pivot shaft.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments 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 the drawings. 1 to 4 show a first embodiment of the present invention,
A hydraulic master cylinder device 3 is attached to a handlebar 1 that steers the front wheels at the front of the vehicle body of a bar-handle vehicle, at a position inside an accelerator grip 2 at the right end.

In this hydraulic master cylinder device 3, a body mounting arm 4a for enclosing the handlebar 1 and a bracket 5 are connected by a fixing bolt 6 so that the liquid is arranged on the front side of the handlebar 1 in the vehicle body. Pressure master cylinder 4 and mounting base 7
a 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 brake lever 7 moves. The working arm 7b pushes the piston 9 of the hydraulic master cylinder 4 inward to increase the pressure of the hydraulic fluid in the hydraulic master cylinder 4, and the pressure-increased hydraulic fluid is supplied to the front disc brakes arranged close to the front wheels. By supplying and hydraulically operating, the front wheels are braked.

The lever holders 4b and 4c are arranged such that the brake lever 7 is moved upward and downward from the front right side of the hydraulic master cylinder 4.
The upper lever holder 4b corresponds to the first lever holder of the present invention, and the lower lever holder 4c includes the lower lever holder 4c.
Similarly, it corresponds to the second lever holder of the present invention.

The upper lever holder 4b has a mounting base 7a.
A large-diameter pivot hole 11 having the same diameter as the rotation hole 10 of
A small-diameter pivot hole 12 is formed coaxially with the large-diameter pivot hole 11 in the lower lever holder 4c. Further, in the lower lever holder 4c, two insertion recesses 13 and 1 which are opened in the upper and lower surfaces while facing each other along the outside of the small-diameter pivot hole 12.
3 and a small diameter pivot hole 1 on the lower surface of the lower lever holder 4c.
Two fitting recesses 14, 14 are provided so as to face each other and extend outward. The fitting recesses 14, 14 and the insertion recesses 13, 13 are provided in the orthogonal direction, and the small diameter pivot hole 1
2, the insertion recesses 13 and the fitting recesses 14 are alternately arranged at intervals of 90 degrees, and the distance between the outer surfaces of the fitting recesses 14 and 14 and the distance between the outer surfaces of the insertion recesses 13 and 13 are different from each other. ., Smaller than the large-diameter pivot hole 11 of the upper lever holder 4b and the turning hole 10 of the brake lever 7, respectively.

The brake lever 7 has the above-mentioned mounting base portion 7a and working arm 7b, a grip portion 7c extending toward the front side of the accelerator grip 2 from the vehicle body, and the brake lever 7 protruding from the mounting base portion 7a toward the front side of the vehicle body of the hydraulic master cylinder 4. And a brake switch actuating piece 7d. The attachment base portion 7a is thicker than the other working arms 7b and the grip portion 7c,
The above-mentioned rotation hole 10 is formed through the inside thereof.

The pivot 8 has a large-diameter shaft portion 8a, a small-diameter shaft portion 8b which is continuous with a tip end surface of the large-diameter shaft portion 8a, and a side end of the small-diameter shaft portion 8b, which projects toward the distal end side. It is composed of two fitting projections 8c and 8c. The large-diameter shaft portion 8a is formed to have substantially the same diameter as the turning hole 10 of the brake lever 7 and the large-diameter pivot hole 11 of the upper lever holder 4b, and the small-diameter shaft portion 8b is formed in the small-diameter pivot hole of the lower lever holder 4c. The diameter of the lower lever holder 4c is substantially the same as that of the lower lever holder 4c, and is longer than the thickness of the lower lever holder 4c. On the base end surface of the large-diameter shaft portion 8a, the tool hanging groove 8
d is formed, and a tool such as a screwdriver is inserted into the tool hooking groove 8d so that the pivot 8 can be rotated.

On the pivot 8 before pivotally supporting the brake lever 7, a spiral spring 15 is externally inserted on the small diameter shaft portion 8b.
The spiral spring 15 is attached to the large-diameter shaft portion 8a and the fitting projections 8c, 8
Use c to prevent it from coming off, and temporarily assemble it to the pivot 8. Further, when the pivot 8 is assembled, both lever holders 4b,
4a, the mounting base 7a of the brake lever 7 is inserted, the pivot hole 10 of the mounting base 7a is coaxially aligned with the pivot holes 11 and 12 of the upper and lower lever holders 4b and 4c, and the pivot 8 is attached to the small diameter shaft portion. From the tip side of 8b, it is inserted into the large diameter pivot hole 11 from the upper side of the upper lever holder 4b.

Next, the small diameter shaft portion 8b of the pivot 8 is connected to the large diameter pivot hole 11 of the upper lever holder 4b and the mounting base portion 7a.
When the tip end surface of the small-diameter shaft portion 8b reaches the upper surface of the lower lever holder 4c after passing through the rotation hole 10, the pivot 8 is slightly rotated in the left-right direction to move the fitting protrusions 8c, 8c to the lower lever. The small-diameter shaft portion 8b is inserted into the small-diameter pivot hole 12 of the lower lever holder 4c while aligning with the insertion concave portions 13 and 13 of the holder 4c and inserting the fitting projections 8c and 8c into the insertion concave portions 13 and 13. . Another spiral spring 15
Is gradually compressed when the pivot 8 is inserted and the distance between the tip surface of the large-diameter shaft portion 8a and the upper surface of the lower lever holder 4c becomes equal to the free length of the spiral spring 15.

Then, the pivot 8 is pushed against the elastic force of the spiral spring 15 to project the fitting protrusions 8c, 8c to the lower surface of the lower lever holder 4c, and then the pivot 8 is rotated 90 degrees to either side. When the pushing protrusion of the pivot 8 is released by aligning the fitting protrusions 8c, 8c with the fitting recesses 14, 14 on the lower surface of the lower lever holder 4c, the pivot 8 causes the restoring force of the spiral spring 15 to restore the upper lever. It is pushed back toward the holder, and the fitting protrusions 8c, 8c of the pivot 8 fit into the fitting recesses 14, 14 of the lower lever holder 4c.

As a result, the large diameter shaft portion 8a of the pivot 8 is formed.
Is located across the large-diameter pivot hole 11 of the upper lever holder 4b and the pivot hole 10 of the mounting base 7a, the brake lever 7 is pivotally supported, and the pivot 8 itself is fitted with a fitting protrusion. The recesses and protrusions of the portions 8c, 8c and the fitting recesses 14, 14 are prevented from coming off in the direction of the upper lever holder, and at the same time, the rotation in the circumferential direction is restricted.

In the pivot 8 thus inserted, the large-diameter shaft portion 8a is entirely housed in the large-diameter pivot hole 11 of the upper lever holder 4b, and the upper surface opening of the pivot hole 11 is covered with the protective cap 16. Be worn. In addition to rubber and soft synthetic resin, a rigid material such as hard synthetic resin or metal is used for the protective cap 16, and even if an external force acts on the upper surface of the upper lever holder 4b, the protective cap 16 pivots. Protect the pivot and prevent the pivot 8 from coming off,
Protects the invasion of dust and rainwater around the axis of the pivot 8.

FIGS. 5 to 7 show a second embodiment of the present invention, in which one end 15a of the helical spring 15 is pivoted to the pivot 8.
Of the large-diameter shaft portion 8a and the other end 15b of the lower lever holder 4c on the upper surface of the lower lever holder 4c so as to apply the torsion force of the spiral spring 15 to the pivot 8. Is different from the embodiment described above. The spiral spring 15 is preliminarily assembled by previously locking either the pivot 8 or the lower lever holder 4c with one end 15a or the other end 15b, but the operability when inserting the pivot 8 is taken into consideration. Then, similarly to the above-described embodiment, it is preferable to temporarily assemble the pivot 8.

The pivot 8 is inserted into the large-diameter pivot hole 11 of the upper lever holder 4b and the pivot hole 10 of the mounting base 7a, so that one end 15a and the other end 15b of the spiral spring 15 are pivoted and the lower lever holder 4c. When it is locked on both sides, the circumferential direction of the pivot 8 is restricted by the spiral spring 15, and in this state, the fitting protrusion 8 of the pivot 8
c and 8c are fitting recesses 14 and 14 of the lower lever holder 4c.
It is in the same phase as, and is deviated from the insertion recesses 13, 13 by 90 degrees.

That is, in order to insert the pivot 8 so that the tip surface of the small-diameter shaft portion 8b reaches the upper surface of the lower lever holder 4c, the small-diameter shaft portion 8b is inserted into the small-diameter pivot hole 12 of the lower lever holder 4c. The fitting protrusions 8c and 8c are aligned with the insertion recesses 13 and 13 by twisting the spiral spring 15 by rotating the pivot 8 to the right or left by 90 degrees, and the fitting protrusions 8c and 8c are aligned. Insertion recess 1
The small-diameter shaft portion 8b is pushed into the small-diameter pivot hole 12 of the lower lever holder 4c while being inserted into 3, 3 (FIG. 6).

While the small-diameter shaft portion 8b is passing through the small-diameter pivot hole 12, a torsion force is generated by the torsion when the pivot 8 is rotated, and the fitting protrusion 8c, 8c is projected to the lower surface of the lower lever holder 4c to release the pushing of the pivot 8, the spiral spring 1
The torsion of 5 is restored, the pivot 8 rotates 90 degrees in the direction opposite to the above-mentioned rotation, the torsion force disappears from the spiral spring 15, and the fitting protrusions 8c, 8c are placed on the lower surface of the lower lever holder 4c. Is aligned with the fitting recesses 14, 14 of the pivot spring 15, the compression of the spiral spring 15 is restored, and the pivot 8 is pushed back toward the upper lever holder.
8c fits into the fitting recesses 14, 14 of the lower lever holder 4c (FIGS. 4 and 5).

After assembling the brake lever 7 in this way, the pivot 8 is moved from the upper lever holder 4b side.
An external force acts on the fitting protrusions 8c, 8c
The torsion force of the spiral spring 15 prevents the pivot 8 from rotating even if the pivot springs 4 and 14 come out downward. If the fitting projections 8c, 8c are the fitting recesses 14,
Even if the pivot 8 rotates after exiting from the position 14, the torsion force of the spiral spring 15 increases as the drag amount as the amount of rotation of the pivot 8 increases. Unless it is forcibly rotated against the force, the fitting protrusions 8c, 8c
Cannot reach the insertion recesses 13, 13 as shown in FIG. Further, when the turning force to the pivot 8 during the rotation is released, the pivot 8 is caused by the torsional force of the winding spring 15 to cause the fitting projections 8c and 8c and the fitting recesses 14 and 14 to rotate.
Is forcibly urged to a position where
Due to the elastic force of 5 in the axial direction, the fitting projections 8c, 8c are fitted into the fitting recesses 14, 14 in a concavo-convex manner.

As described above, according to the first and second embodiments, the brake lever 7 can be assembled only by inserting the pivot 8 and rotating the pivot 8, so that the male screw of the pivot can be attached to the lever holder or the fixing nut. Compared to the conventional double-screwed one, the assembling work can be simplified and the assembling time can be shortened. In addition, it is economical because it eliminates the need for reamer processing that requires high processing accuracy, tapping and other processing operations, and retaining members such as fixing nuts and split pins that are economical. Since it can be inserted with one hand, it has excellent workability in assembling in places where it is difficult to see visually.

Further, since the brake lever 7 can be easily removed with one touch as in the case of assembling, it is most suitable for the motorcycle exchanging the lever in the motorcycle race, which requires the reduction of the pit stop time. Then,
The work time can be shortened and the labor cost can be reduced.

The base end surface of the large-diameter shaft portion 8a is positioned in the large-diameter pivot hole 11 of the upper lever holder 4b, and the entire pivot 8 is pivot hole 1 of the lever holders 4b and 4c.
Since they are housed in the turning holes 10 of the brake levers 1 and 12 and the lever levers 4b and 4c, there is no extra overhanging portion outside the lever holders 4b and 4c. Furthermore, since the protective cap 16 is attached to the upper surface opening of the large-diameter pivot hole 11, the protective cap 16 protects the pivot 8 even if an external force acts on the upper surface of the upper lever holder 4b. In addition to preventing the 8 from slipping off, it also prevents dust and rainwater from entering the axis around the pivot 8. In the latter embodiment in which the torsional force of the spiral spring 15 is applied to the pivot 8, the pivot 8 can be more reliably prevented from coming off.

8 to 11 show a third embodiment of the present invention, in which the lower lever holder 4c has a small-diameter pivot hole 12 having substantially the same diameter as the small-diameter shaft portion 8b of the pivot 8 and the small-diameter pivot. A pair of fitting protrusions 20 and 20 are provided so as to face each other from the inner surface of the hole 12.

The small-diameter shaft portion 8b of the pivot 8 has a pair of fitting recesses 21 and 21, and a fitting recess 22 for guiding the fitting projections 20 and 20 of the lower lever holder 4c into the fitting recesses 21 and 21. , 22 are provided. Each insertion recess 2
2 includes a vertical groove 22a that opens at the tip of the small-diameter shaft portion 8b, and a peripheral groove 22b that extends in the circumferential direction from the vertical groove 22a. It is continuous to the tip side of the shaft portion 8b. Further, as the spiral spring 23, the same compression type as in the first embodiment is used,
The pivot 8 is simply repelled toward the upper lever holder.

Large-diameter pivot hole 11 of upper lever holder 4b
The small-diameter shaft portion 8b of the pivot 8 inserted into the turning hole 10 of the brake lever 7 from the vertical groove 2 of the insertion recess 22.
2a is aligned with the fitting protrusion 20 of the lower lever holder 4c, and the small diameter shaft portion 8b is inserted into the small diameter pivot hole 12 while inserting the fitting protrusion 20 into the vertical groove 22a (see FIG. 1).
1). Then, after the fitting projection 20 comes into contact with the circumferential groove 22b of the insertion recess 22, the pivot 8 is rotated to accommodate the fitting projection 20 in the circumferential groove 22b.
Position to the end of.

The compression of the spiral spring 23 is performed by the fitting projection 20.
Is started while moving in the vertical groove 22a, and the fitting protrusion 2
When 0 reaches the end of the circumferential groove 22b as described above, the pivot 8 is elastically bulged toward the upper lever holder by the spiral spring 23, and the respective fitting protrusions 20 fit into the fitting recesses 21. Due to this concave-convex fitting, the pivot 8 is prevented from coming off, and at the same time, the rotation in the circumferential direction is restricted (FIGS. 8 and 10).

12 to 13 show a fourth embodiment of the present invention, in which the lower lever holder 4c has a smaller diameter shaft portion 8b of the pivot 8 having a smaller diameter than the turning hole 10 of the brake lever 7. Larger than the guide hole 30, and the guide hole 30
Is provided with three fitting protrusions 31 protruding from the inner surface of the fitting at equal intervals, and the space between the fitting protrusions 31 is used as a recess 32.

The tip end surface of the fitting projection 31 is in a circular shape having the same diameter as the small-diameter shaft portion 8b to form a small-diameter pivot hole 12, and these three fittings are fitted when the small-diameter shaft portion 8b is inserted. The small diameter pivot hole 12 formed by the projection 31 holds the small diameter shaft portion 8b.

The small-diameter shaft portion 8b of the pivot 8 is fitted with three guide projections 33 projecting from the outer surface front end side at equal intervals, and the ends of the respective guide projections 33 and the large-diameter shaft portion side. A recess 34 is provided. The tip surface of the guide protrusion 33 is located in a circular shape having the same diameter as the guide hole 30 of the lower lever holder 4c, and when the small diameter shaft portion 8b is inserted into the small diameter pivot hole 12, the three guide protrusions 33 are formed. Is the guide hole 30
Slide to guide the pivot 8 so that it can be inserted smoothly without tilting.

Large-diameter pivot hole 11 of upper lever holder 4b
From the above, the small diameter shaft portion 8b of the pivot 8 inserted into the rotation hole 10 of the brake lever 7 aligns the guide protrusion 33 with the insertion recess 32 of the lower lever holder 4c, and the guide protrusion 33 is inserted into the guide hole 30. Slide into and insert recess 3
The small-diameter shaft portion 8b is inserted into the small-diameter pivot hole 12 formed by the fitting protrusion 31 while being inserted into the second shaft 2. Then, after the guide protrusion 33 has passed through the insertion recess 32, the pivot 8 is rotated to align the fitting protrusion 31 and the fitting recess 34.

The compression of the spiral spring 15 is started at least by the time when the guide projection 33 of the pivot 8 is inserted into the guide hole 30 of the lower lever holder 4c, and the fitting projection 31 and the fitting recess 34 are described above. When the pivots 8 are aligned as described above, the pivot 8 is elastically urged toward the upper lever holder by the spiral spring 15, and the respective fitting projections 31 are fitted into the fitting recesses 34.
To fit. Due to this concave-convex fitting, the pivot 8 is prevented from coming off, and at the same time, the rotation in the circumferential direction is restricted (see FIG.
2, FIG. 14).

The present invention can be widely applied as a supporting structure for a vehicle brake lever, a clutch lever, a pedal lever for a brake pedal, a clutch pedal, and various other rotating levers such as a crank lever and a link lever. Is.

[0045]

As described above, according to the constitution of the present invention,
The rotation lever can be attached just by inserting the pivot and rotating, so compared to the conventional one in which the male screw of the pivot is double screwed to the lever holder and the fixing nut,
The installation work can be simplified and the installation time can be shortened. In addition, it is economical because it does not require reamer processing that requires high processing accuracy, processing such as tapping, and retaining members such as fixing nuts and split pins, and it is economical because the retaining member is omitted. Since it can be done with one hand, it is excellent in installation workability in places where it is difficult to see visually.

Further, since the turning lever can be easily removed with one touch as in the case of mounting, it is particularly suitable for the replacement of the lever in a motorcycle race, which requires the reduction of the pit-in time, and for the replacement of the lever of a commercially available car. Even if there is, the work time can be shortened and the labor cost can be reduced.

Further, the elastic material is a spiral spring, one end of the spiral spring is locked to the pivot, and the other end is locked to the second lever holder, so that the torsion force of the spiral spring is When the pivot is rotated in the pull-out direction by imparting to the pivot so that the fitting protrusion of the pivot matches the fitting recess of the second lever holder,
Since the torsion force of the spiral spring acts as a drag force, it becomes possible to more reliably prevent the pivot from coming off.

Further, by locating the base end surface of the large-diameter shaft portion of the pivot in the large-diameter pivot hole of the first lever holder, there is no extra projecting portion outside the lever holder, and there is no room for mounting space. It is also applicable in cases. Further, when the protective cap is attached to the opening of the large-diameter pivot hole, the protective cap protects the pivot and effectively prevents the pivot from coming off even if an external force acts on the outer surface of the first lever holder. In addition, it is possible to prevent dust and rainwater from entering around the pivot axis.

[Brief description of drawings]

FIG. 1 is a sectional view taken along line I-I of FIG.

FIG. 2 is a plan view of a hydraulic master cylinder device showing a first embodiment in which the present invention is applied to a front disc brake of a bar handle vehicle.

FIG. 3 is an exploded perspective view of a lower lever holder and a pivot.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

FIG. 5 is a sectional front view of essential parts of a hydraulic master cylinder device showing a second embodiment in which the present invention is applied to a front disc brake of a bar-handle vehicle.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a sectional plan view showing an operating state of FIG.

FIG. 8 is a sectional front view of essential parts of a hydraulic master cylinder device showing a third embodiment in which the present invention is applied to a front disc brake of a bar handle vehicle.

FIG. 9 is an exploded perspective view of a lower lever holder and a pivot.

10 is a sectional view taken along line XX of FIG.

11 is a cross-sectional plan view showing the operating state of FIG.

FIG. 12 is a cross-sectional front view of essential parts of a hydraulic master cylinder device showing a fourth embodiment in which the present invention is applied to a front disc brake of a bar-handle vehicle.

FIG. 13 is an exploded perspective view of a lower lever holder and a pivot.

14 is a sectional view taken along line XIV-XIV in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Handlebar 2 ... Accelerator grip 3 ... Hydraulic master cylinder device 4 ... Hydraulic master cylinder 4b ... Lever holder used as the 1st lever holder of this invention 4c ... Lever holder 7 used as the 2nd lever holder of this invention 7 ... Book Brake lever 7a serving as a turning lever of the invention ... Mounting base portion of brake lever 7b ... Working arm of brake lever 7c ... Grip portion of brake lever 8 ... Pivot 8a ... Large diameter shaft portion of pivot 8b ... Pivot 8 Small-diameter shaft portion 8c ... Fitting projection portion protruding from the tip side portion of the small-diameter shaft portion 8b of the pivot 8 ... Rotation hole of the mounting base portion 7a ... Large diameter pivot hole of the upper lever holder 4b 12 ... Of the lower lever holder 4c Small-diameter pivot hole 13 ... Insertion recess formed along the outside of the small-diameter pivot hole 12 ... Small-diameter pivot hole on the lower surface of the lower lever holder 4c 2
Fitting concavity 15 formed on the outer side of the coil spring 15a ... One end of the coil spring 15b ... The other end of the coil spring 15 ... Protective cap 20 ... Fitting protrusion 21 ... Fitting recess 22 ... Inserting recess 22a ... Vertical groove of the insertion recess 22b ... Circumferential groove of the insertion recess 23 ... Spiral spring 30 ... Guide hole 31 ... Fitting projection 32 ... Inserting recess 33 ... Guide projection 34 ... Fitting recess

Claims (5)

[Claims] 1. A mounting base of a rotating lever is inserted between two parallel first and second lever holders, and pivots are inserted into the mounting base and both of the lever holders. In a support structure of a rotating lever that pivotally supports the rotating lever, a large-diameter pivot hole having the same diameter as the rotating hole of the mounting base is bored in the first lever holder, and the second lever is provided. A small-diameter pivot hole is bored in the holder coaxially with the large-diameter pivot hole, and a large-sized pivot hole is inserted into the pivot over the large-diameter pivot hole of the first lever holder and the rotation hole of the mounting base. A small-diameter shaft portion and a small-diameter shaft portion that is continuously inserted into the distal end of the large-diameter shaft portion and spans the rotation hole of the mounting base portion and the small-diameter pivot hole of the second lever holder are provided. Shaft part and small diameter pivot hole of the second lever holder A mating projection formed on either one of the two, and a mating recess for mating the mating projection with the mating projection to prevent the pivot from coming off; and a mating recess allowing insertion of the mating projection. And a pivot fixed to the first lever is provided between the second lever holder and the large-diameter shaft portion of the pivot by the concave-convex fitting of the fitting projection and the fitting recess.
A support structure for a rotating lever, characterized in that an elastic material that elastically springs toward the lever holder is contracted. 2. A mounting base of a rotating lever is inserted between two parallel first and second lever holders, and a pivot is inserted through the mounting base and both of the lever holders. In a support structure of a rotating lever that pivotally supports the rotating lever, a large-diameter pivot hole having the same diameter as the rotating hole of the mounting base is bored in the first lever holder, and the second lever is provided. A small-diameter pivot hole is bored in the holder coaxially with the large-diameter pivot hole, and a large-sized pivot hole is inserted into the pivot over the large-diameter pivot hole of the first lever holder and the rotation hole of the mounting base. A small-diameter shaft portion, a small-diameter shaft portion that is continuously inserted into the distal end surface of the large-diameter shaft portion and extends over the rotation hole of the mounting base portion and the small-diameter pivot hole of the second lever holder, and the small-diameter shaft portion. And a guide protrusion that protrudes to the side of the portion An engaging recess that opens to the outer surface of the shaft and the large-diameter shaft portion side, and an insertion recess that allows the fitting protrusion to be inserted into the second lever holder outside the small-diameter pivot hole, and the insertion recess. A fitting concave portion that projects into the inner surface of the fitting and is fitted into the fitting projection portion in a concavo-convex manner to prevent the pivot from coming off, and the fitting is provided between the second lever holder and the large-diameter shaft portion of the pivot. A support structure for a rotating lever, characterized in that an elastic member that elastically repels a pivot, which is prevented from coming off by a projection and a fitting recess, is fitted to the first lever holder. 3. A helical spring is used as the elastic material, one end of the helical spring is locked to the pivot, and the other end is locked to the second lever holder, so that a torsion force of the helical spring is generated. The pivot lever support structure according to claim 1 or 2, wherein the pivot is provided so that the fitting protrusion and the fitting recess are aligned with each other. 4. The rotating shaft according to claim 1, wherein the base end surface of the large-diameter shaft portion of the pivot is housed in the large-diameter pivot hole of the first lever holder. Dynamic lever support structure. 5. The support structure for a rotating lever according to claim 4, wherein a protective cap is attached to the large-diameter pivot hole of the first lever holder.