JP3078548B1 - Throttle opening retention unit for motorcycles - Google Patents

Abstract

The present invention provides a convenient throttle opening degree holding unit that can be freely attached to a handlebar of a motor vehicle by a user. A mounting base (B) inserted into and fixed to a distal end of a handlebar (10), a brake shoe (34) supported by the mounting base (B), and a brake shoe (3).
4) A rotary operation cover (42) screwed and fastened to the mounting base (B) so as to be able to advance and retreat, and the operation cover (42) and the braking shoe ( And a pressing spring (40) for pressing the throttle grip, which is interposed between the grip shoe (34) and the brake shoe (34) by screwing the operation cover (42). , The opening of the throttle valve is kept constant, and the grip (G) can be forcibly rotated by force even in the holding state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle opening holding unit that can be retrofitted to a motorcycle.

[0002]

2. Description of the Related Art A handlebar of a two-wheeled motor vehicle is fitted with a throttle grip for remotely controlling the opening and closing of a throttle valve of a mounted engine, and acceleration / deceleration corresponding to the amount of rotation of the throttle grip can be obtained. However, keeping the opening of the throttle valve constant particularly during traveling on a highway causes fatigue for the pilot.

[0003]

In this regard, as a constant-speed holding device for a motorcycle for releasing the driver from fatigue, for example, Japanese Patent Application Laid-Open Nos. 61-6032 and 62-77293.
No. 5, JP-A-63-162339 and JP-A-63-3
No. 12241, Japanese Patent Application Laid-Open No. 4-306134, etc. are proposed, but all of them are so-called maker-attached options, which are provided exclusively for the motorcycle from the beginning of manufacture, so that the user who operates the vehicle can freely use it. It cannot be retrofitted, is inferior in versatility and compatibility with various motorcycles, and is inconvenient.

[0004]

SUMMARY OF THE INVENTION The present invention intends to drastically solve the above-mentioned problem. For this purpose, a throttle grip for controlling opening and closing of a throttle valve of an on-board engine is fitted in a rotatable manner. A mounting base fixedly inserted into and removed from the distal end of the handlebar,

[0005] A brake shoe supported on the mounting base so that only the forward and backward slides can be performed on the distal end surface of the throttle grip,

A turning operation cover screwed and fastened to the mounting base so as to be able to advance and retreat so as to push the brake shoe toward the tip end surface of the throttle grip;

A press spring for pressing the brake shoe against the distal end surface of the throttle grip by being interposed between the rotation operation cover and the brake shoe;

By the screwing operation of the rotation operation cover, the brake shoe is pressed against the tip end surface of the throttle grip to resiliently hold the opening of the throttle valve constant,

In the holding state, the throttle grip is set so as to be able to be forcibly rotated by force against the urging force of the pressing spring.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a motorcycle according to a first embodiment of the present invention; FIG. The bar (G) is a throttle grip which is inserted into and rotatably mounted on the throttle grip, and a pulley (1) for locking a throttle cable which projects integrally from a base end thereof.
1) is covered by a handle switch housing (12).

The amount of rotation of the throttle grip (G) is determined by the throttle cable (13) locked to the pulley (11) as the opening of a throttle valve (not shown) in the engine mounted on the motorcycle. Acceleration and deceleration can be obtained. In other words, when the operator rotates the throttle grip (G) in a counterclockwise direction (inward) in a side view, the acceleration is performed, and when the operator rotates the throttle grip (G) in a clockwise direction (outward) in a side view, the speed is reduced. When you release the hand, the throttle grip (G)
Self-rotationally returns to the idling state of the engine.

A grip cover (14) made of an elastic material such as rubber or synthetic resin is integrally attached to a body portion of the throttle grip (G) exposed from the handle switch housing (12). The diameter (D1) of the grip cover (14) is, for example, about 40 mm.
(15) and (16) show a pair of large-diameter non-slip flanges for the operation hand which continuously protrude from the base end and the front end of the grip cover (14).

The distal end of the handlebar (10) is formed as a small-diameter extension pipe (17) from the distal end surface of the throttle grip (G) to a predetermined length (L1) (for example, about 23 mm) as shown in FIGS. ) Is exposed and its extension tube (1
7) is provided with a female screw (18) for attaching a handle weight (not shown).

(U) is a generic name of a throttle opening holding unit according to the present invention, and a handlebar (10) of the extension pipe (17) is provided by using an existing female screw (18).
It is configured as follows so that it can be retrofitted to the tip of the.

That is, in FIGS. 4 to 22 showing the throttle opening holding unit (U) in an enlarged manner, (B) shows a fixed length (L) made of a metal material such as an aluminum alloy or copper.
2) A mounting base (for example, about 30 mm) shaped substantially like a box connector, and an insertion port cylinder part (19) serving as a base end thereof and a bolt head escape on the front end side continuously extended therefrom. An inlet tube portion (20) and a large disk-shaped flange portion (21) continuously projecting from a base end position of the insertion tube portion (19) are provided.

Then, the insertion port barrel portion (1
The partition wall (22) that separates the bolt head escape port cylindrical part (20) from the tip side (9) communicates with the female screw (18) of the extension pipe part (17) in the handlebar (10). A mounting bolt insertion hole (23) is formed, and the throttle opening is performed by a mounting bolt (24) that is screwed into the female screw (18) of the extension pipe portion (17) from the insertion hole (23). The mounting base (B) of the degree holding unit (U) is fixedly integrated with the extension tube (17) of the handlebar (10).

In the attached state of the throttle opening holding unit (U), as shown in FIGS. 3 and 4, the insertion port cylinder portion (19) of the attachment base (B) is connected to the extension pipe portion (17) of the handlebar (10). ), And the mounting base (B)
Bolt head (2)
The large-diameter head (25) of 4) is relieved. (26) is the head (25) of the mounting bolt (24)
The locking concave groove for the rotating operation tool, which is cut out in FIG.

A male screw (27) is provided on an outer peripheral surface of the bolt head escape port cylindrical portion (20), which is a distal end side of the mounting base (B), for screwing with a rotation operation cover described later. Is engraved. (D2) (T) is the same mounting base (B)
A constant diameter (for example, about 36 mm) and a thickness (for example, about 9 m) of the disc-shaped flange portion (21) projecting from the base end of
m), a concave groove (2) for receiving an O-ring is provided on the outer peripheral surface of the front end portion of the flange portion (21).
8) is cut out.

Reference numeral (29) denotes an O-ring fitted in the concave peripheral groove (28) of the flange portion (21), which is made of an elastic material such as rubber or synthetic resin. The fitting surface between the flange portion (21) and a later-described turning operation cover is kept in a waterproof state, and the natural operation of the turning operation cover relative to the mounting base (B) is prevented.

Also, an eave-shaped cover ring (3) is provided from the periphery of the flange portion (21) of the mounting base (B).
0) is continuously extended by a predetermined length (L3) (for example, about 7 mm) in the base end direction where the throttle grip (G) exists, thereby surrounding the outer peripheral surface of a brake shoe described later. .

In this case, the diameter (D3) of the cover ring (30) should be substantially equal to the diameter (D1) of the grip cover (14) forming the throttle grip (G) (for example, about 40 mm). (21)
Is formed so as to protrude slightly larger in diameter from the outer peripheral surface thereof, so that the stepped portion can be used as a stopper (31) for the rotation operation cover to receive the screwing of the rotation operation cover described later. .

A plurality (32 in total in the example in the figure) is formed through the disk-shaped flange portion (21) projecting from the base end of the mounting base (B) as a whole radially symmetric distribution type. ) Is a slide screw insertion hole, and each of the insertion holes (3
A slide screw (33) for supporting a braking shoe is slidably inserted through 2).

Moreover, each of the slide screws (33) extends in parallel with the mounting bolt (24), and these slide screws (33) extend from the flange portion (21) of the mounting base (B) to the throttle grip (G). A brake shoe (34) is attached and fixed to one end (the screw tip of the screw) exposed toward the front end in a screwed state. For this reason, there is no possibility that the brake shoe (34) rotates together with the throttle grip (G).

The braking shoe (34) is formed from a hard synthetic resin material (preferably, "Duracon") into a ring shape having a diameter substantially corresponding to the throttle grip (G). Is correctly positioned to face the tip surface of the throttle grip (G),
The entire surface can be brought into frictional contact with each other.

On the other hand, a return spring (3) is also provided at the other end (neck of the screw) where each slide screw (33) is exposed in the opposite direction from the flange portion (21) of the mounting base (B).
5) is wound. The slide screw (33)
The return spring (35) is interposed and installed between the large-diameter head (36) as a spring retainer and the flat distal end surface of the flange portion (21). Accordingly, the slide screw (33) is constantly urged in the direction of retracting from the throttle grip (G) until the braking shoe (34) is received by the flat base end surface of the flange portion (21).

A plurality (37) is formed between the adjacent parts of the slide screw insertion holes (32) in the flange portion (21) of the mounting base (B) and also formed in a radially symmetric distribution type. The pressure pin insertion holes (in the example shown, three in total) and (38) are pressure pins slidably inserted into the respective insertion holes (37), and as shown in FIGS. 39) and is integrally planted in parallel with the slide screw (33).

The slide ring (39) is formed in a ring shape from the same hard synthetic resin material as the brake shoe (34), and has a flange portion (2) on the mounting base (B).
It has a diameter substantially equal to the diameter (D2) of (1), and is slidably inserted into and slid into the bolt head inlet / outlet tubular portion (20) of the mounting base (B).

Each pressing pin (38) is connected to the brake shoe (3).
4) is pressed against the tip end surface of the throttle grip (G). If the rigidity is in the pressed state, even if the opening of the throttle valve can be held constant, the operator can control the throttle in the held state. The rotation of the grip (G) cannot be performed, which hinders the emergency stop of the motorcycle, which is extremely dangerous.

Therefore, a separate pressing spring (40) is interposed between each pressing pin (38) and the facing shoe (34), and the pressing pin (38) is provided.
And the brake shoe (34) is kept in an elastic contact state. Due to the pressing spring (40), when the mounting base (B) is mounted on the handlebar (10), the clearance between the facing surfaces of the throttle grip (G) changes, but this is absorbed by itself. Therefore, it can be conveniently mounted and used, and in particular, the risk of excessively pressing the brake shoe (34) against the throttle grip (G) is prevented.

That is, when the operator releases his / her hand under a braking state in which the braking shoe (34) is pressed against the distal end surface of the throttle grip (G), the throttle grip (G) rotates. There is no danger, and the opening of the throttle valve is kept constant, but even in this state, the driver manually forcibly operates the throttle grip (G) to apply a torque equal to or higher than a predetermined level. In addition, it is possible to rotate in both the acceleration direction and the deceleration direction.

The return spring (35) and the pressing spring (40), which are independent of each other, are both composed of compression coil springs, and the pressing spring (40) is a return spring (3).
It has a greater tension than 5). (41) shows a spring receiving groove cut out in the braking shoe (34).

Further, (42) is the slide ring (3)
9) A rotating operation cover for pushing forward, which is formed from the same metal material as the mounting base (B) into a substantially U-shaped section having a fixed length (L4) (for example, about 30 mm) as shown in FIGS. The female screw (43) machined at the center of the tip boss portion is the male screw (27) of the mounting base (B).
The outer peripheral surface including the flange portion (21) of the mounting base (B) is surrounded by the remaining base end cover portion while being screwed together so as to be able to advance and retreat. A flange portion (21) of the mounting base (B) and a rotating operation cover (42) surrounding the flange portion (21).
The O-ring (29) is interposed on the fitting surface of the O-ring.

The diameter (D4) of the rotary operation cover (42) is substantially equal to the diameter (D1) of the grip cover (14) in the throttle grip (G), and the grip cover (14) is gripped. The rotating operation cover (42) can be smoothly and conveniently rotated by the operated operator. (44) is an uneven surface for preventing slippage of an operation hand such as knurling provided on the outer peripheral surface of the rotation operation cover (42), and (45) is also cut out on the tip end surface of the rotation operation cover (42). 5 shows a collar receiving step.

Reference numeral (46) denotes a metal retaining collar of the rotating operation cover (42), which has a horizontal hat shape as shown in FIGS. 20 and 21, and has a bolt head escape opening of the mounting base (B). The head (2) of the cylindrical part (20) and the mounting bolt (24)
5), a large-diameter stopper flange (47) which is sandwiched and fixed between each other and continuously protrudes from the tip end thereof.
The collar receiving step (4) of the rotation operation cover (42)
5), the rotation operation cover (4)
2) is kept in a retaining state. (48) is a mounting bolt release hole formed at the base end of the retaining collar (46).

Since the throttle opening holding unit (U) of the present invention is in a mounted state in which it is inserted into the extension tube portion (17) of the handlebar (10) of the motorcycle as shown in FIGS. As a pilot, the operator's hand holding the throttle grip (G) can also smoothly and quickly turn the turning operation cover (42) of the holding unit (U).

Then, as is apparent from FIG. 4, during normal traveling, the turning operation cover (42) is screwed back toward the tip end (R) of the mounting base (B). Then, the pressing pin (38) receiving the urging force of the pressing spring (40) also retreats, so that the brake shoe (34) has its return spring (35).
In combination with the urging force, the throttle grip (G) retreats quickly and reliably from the front end face, and the throttle grip (G) is maintained in a free state. Acceleration and deceleration of the motorcycle can be performed.

During the traveling, when the opening of the throttle valve is maintained at a desired constant, the turning operation cover (4)
2) from the state of FIG. 4 to the base end direction (F) of the mounting base (B) where the throttle grip (G) exists, as shown in FIG.
It is screwed into. Then, the pressing pin (3
8) moves forward against the urging force of the return spring (35),
As a result, the brake shoe (34) is resiliently pressed to the distal end surface of the throttle grip (G) via the pressing spring (40). The throttle valve does not return to the idling state, but is stably maintained at a constant opening of the throttle valve. (S) indicates the forward / backward stroke of the braking shoe (34).

During traveling with the opening of the throttle valve kept constant, the brake shoe (34) is
In response to the pressing elastic pressure of 0), the brake shoe (34) is in full frictional contact with the throttle grip (G), and the biasing force of the return spring (35) weaker than the pressing force is applied to the braking shoe (34). It works. However, the slide screw (3) on which the return spring (35) is wound
The head (36) of (3) is not pressed by the slide ring (39), and a certain retreat allowable gap (C) is still secured between them, so that the throttle grip (G) If the operator applies a torque equal to or higher than a predetermined level, the grip (G) can be rotated in either the acceleration direction or the deceleration direction. There is no danger in stopping.

The degree of rotation of the turning operation cover (42) required to press the brake shoe (34) against the throttle grip (G) depends on the female screw (43) screwed to the mounting base (B). And the male screw (27) are engraved on a multi-threaded screw having a coarse pitch, for example, by about 180
It is preferable to set a constant rotation angle of degrees to 270 degrees so that the throttle grip (G) can be braked as quickly as possible.

A turning operation cover (42) for pressing the brake shoe (34) against the throttle grip (G).
Is desirably set to the same as the rotational direction in which the throttle grip (G) is accelerated, and to be specified in a counterclockwise direction (inward) in a side view. This is because it does not cause an erroneous operation by the operator and can improve the convenience in use.

Although not shown, the outer peripheral surface of the rotation operation cover (42) has a screwing direction for pressing the brake shoe (34) against the throttle grip (G) and a screwing direction for releasing the same. Are provided on the outer peripheral surface of the cover ring (30) of the mounting base (B) adjacent to the guide index, indicating the amount of rotation of the rotation operation cover (42). Is preferably applied.

In the first embodiment shown in FIGS. 1 to 22, the fixed length (L) is set from the throttle grip (G) of the motorcycle.
Only the extension tube part (1) of the handlebar (10) exposed
7), the throttle opening holding unit (U) having a configuration that can be retrofitted by replacing the existing handle weight has been described. As shown in the second embodiment of FIGS.
The handlebar (10) of the motorcycle is connected to the extension pipe (1).
7) In the case of a configuration made of a simple metal tube not having the handlebar (10), the mounting base (B) of the throttle opening holding unit (U) according to the present invention has the following configuration. Determined so that it can be retrofitted to the tip.

That is, the insertion port tube portion (19) on the base end side of the mounting base (B) is elongated to have a diameter that can be inserted into the hollow interior of the handlebar (10), and extends over the entire length thereof. A mounting bolt insertion hole (23) is formed to penetrate, and a long mounting bolt (24) is skewed and penetrated through the mounting base (B) from the tip end side. Its mounting bolts (2
As in the first embodiment, the large-diameter head (25) of (4) is allowed to escape into the bolt head escape opening cylindrical portion (20) forming the distal end side of the mounting base (B).

Further, a rubber collar (49) serving as an embedding anchor is fitted over the base end of the mounting base (B) where the mounting bolt (24) is exposed from the insertion port tube (19). Subsequently, a seat nut (50) for preventing the collar (49) from coming off is also screwed and fastened to the base end of the mounting bolt (24). 49) and hold it in a temporarily stopped state.

Then, after inserting the insertion tube portion (19) of the mounting base (B) into the hollow inside of the handlebar (10), the mounting bolt (24) is turned from its head (25). And tighten it up.

In this case, the collar (49) sandwiched between the insertion port (19) and the nut (50).
Is expanded and deformed to a large diameter as the mounting bolt (24) is tightened, and is fixedly integrated with the inner peripheral surface of the handlebar (10) in a compressed state. The brake shoe (34) of the mounting base (B) mounted on the front surface of the throttle grip (G) faces the same as in the first embodiment.

Since the other configurations and usage in the second embodiment are substantially the same as those in the first embodiment, the corresponding reference numerals to FIGS. The detailed description will be omitted.

In any of the first and second embodiments,
The handlebar (10) of the motorcycle is left in its existing state, and no special processing such as remodeling is required for the handlebar (10), and the throttle opening holding unit (U) can be freely and simply operated by the user. The mounting base (B) of the holding unit (U) can be removed from the handlebar (10) by loosening the mounting bolts (24). Excellent in versatility and compatibility.

In the case of the first and second embodiments, the turning operation cover (42) for sliding the brake shoe (34) forward and backward with respect to the distal end surface of the throttle grip (G) is literally provided with the throttle grip (G). ) Is a type that is rotated in the same manner as in (1), and is in a state of being installed side by side with the throttle grip (G), so that it is very easy to use, and there is no risk of accidental natural rotation in the retraction direction. The stability of the state in which the throttle opening is maintained is further enhanced in cooperation with the O-ring (29).

Even if the rotating operation cover (42) is of a type that can be operated to rotate, and even if the brake shoe (34) forms a ring shape corresponding to the throttle grip (G), the rotating The braking is performed by a plurality of pressing pins (38) that are integrally erected from a slide ring (39) that is separate and independent from the operation cover (42), and a plurality of slide screws (33) that are interposed between the adjacent pressing pins (38). Shoe (3
4) is in a state of being stably supported, there is no danger that this will be accompanied by the throttle grip (G), and the braking shoe (34) will be combined with the biasing force of the pressing spring (40) to form the throttle grip (40). (G) can be pressed and pressed against the front end face in the overall frictional contact state, and the braking action is excellent in reliability and durability.

Further, in a mounting state in which the mounting base (B) of the throttle opening holding unit (U) is inserted and fixed to the distal end of the handlebar (10), the brake shoe (34) on the mounting base (B) side. Even if the clearance generated between the front end of the throttle grip (G) and the throttle grip (G) changes at random for each motorcycle,
The change can be universally absorbed by the pressing spring (40) by itself, and the holding unit (U) can be extremely easily processed and assembled into a unit without requiring difficult adjustment for each vehicle type. It has advantages and is very effective in mass production.

[0052]

As described above, in the throttle opening holding unit (U) for a motorcycle according to the present invention, the throttle grip (G) for controlling the opening and closing of the throttle valve of the mounted engine is rotatably fitted. A mounting base (B) that is inserted and removed so as to be freely inserted into and fixed to the distal end of the handlebar (10);

A brake shoe (34) supported by the mounting base (B) so that only the forward / backward slide can be performed on the distal end surface of the throttle grip (G);

A turning operation cover (42) screwed to the mounting base (B) so as to be able to advance and retreat so as to push the braking shoe (34) toward the distal end surface of the throttle grip (G);

By being interposed between the rotation operation cover (42) and the braking shoe (34),
A pressing spring (40) for pressing the braking shoe (34) against the distal end surface of the throttle grip (G);

The brake shoe (34) is moved to the throttle grip (G) by the screwing operation of the rotation operation cover (42).
Pressing against the end face of the

In the holding state, the pressing spring (4
Since the throttle grip (G) is set so as to be able to be forcibly and rotationally operated against the urging force of (0), the problem of the prior art described at the beginning can be completely solved.

That is, according to the configuration of the present invention, the handlebar (10) of the motorcycle is kept in the existing state.
The throttle opening holding unit (U) can be freely and easily retrofitted on the user side at the tip end thereof, and the mounting base (B) of the holding unit (U) can be attached to the handlebar (10). Because it is possible to extract from a motorcycle, it is extremely excellent in versatility and compatibility with various motorcycles.

In particular, a separate pressing spring (40) is provided between the rotating operation cover (42) for pushing the brake shoe (34) toward the distal end surface of the throttle grip (G) and the brake shoe (34). ) Is interposed, and the braking shoe (34) is pressed against the distal end surface of the throttle grip (G) to press and repress the brake shoe (34). Not only can the valve maintain a certain degree of opening, but also in this state, the operator manually forcibly turns the throttle grip (G) to rotate the throttle grip (G).
Since the vehicle speed can be increased or decreased, there is no danger at the time of an emergency stop.

The rotary operation cover (42) is of a type that is rotatably operated similarly to the throttle grip (G), and is screwed and fastened to the mounting base (B) so as to be able to advance and retreat.
Due to the positional relationship between the throttle grip (G) and the installation position, the rotation operation cover (42) can be quickly and conveniently rotated by the operator holding the throttle grip (G). In addition to being convenient for use, there is no danger that the turning operation cover (42) may be spontaneously turned spontaneously even if it receives vibration during traveling.

Furthermore, if the configuration of claim 2 is adopted,
A brake shoe (34) is stably supported on the mounting base (B) by a plurality of slide screws (33) and pressing pins (38) inserted into the flange portion (21) of the mounting base (B). This has the effect of reliably preventing the throttle grip (G) from being entrained by the throttle grip (G) when braking, and the braking shoe (34) is excellent in durability.

If the configuration of claim 3 is adopted, the fitting surface between the flange portion (21) of the mounting base (B) and the rotating operation cover (42) surrounding the outer peripheral surface is formed by the O-ring (2).
According to 9), not only the waterproof state is maintained, but also there is an effect that the possibility that the turning operation cover (42) is spontaneously turned spontaneously with respect to the mounting base (B) can be more completely prevented.

If the configuration of claim 4 is adopted, the rotation operation cover (4) is fixed by the mounting bolt (24) for fixing the mounting base (B) to the tip of the handlebar (10).
The retaining collar (49) of (2) can also be sandwiched between the mounting base (B) and it can be said that it is a remarkably rational design, which is useful for achieving the mass production effect.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view of a motorcycle provided with a throttle opening holding unit according to the present invention.

FIG. 2 is a plan sectional view showing the holding unit in a state where the holding unit is removed from a handlebar.

FIG. 3 is a plan sectional view corresponding to FIG. 3, showing a holding unit attached to a handlebar.

FIG. 4 is a partially enlarged sectional view of FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is a sectional view taken along line 6-6 of FIG. 4;

FIG. 7 is a cross-sectional view illustrating a disassembled state of the holding unit.

FIG. 8 is a side view extracting and showing a mounting base.

FIG. 9 is a front view of FIG. 8;

FIG. 10 is a sectional view taken along line 10-10 of FIG. 8;

FIG. 11 is a sectional view taken along line 11-11 of FIG. 8;

FIG. 12 is a front view showing a braking shoe extracted therefrom.

FIG. 13 is a sectional view taken along line 13-13 of FIG. 12;

FIG. 14 is a perspective view showing a slide ring extracted.

FIG. 15 is a front view of FIG.

16 is a sectional view taken along line 16-16 of FIG.

FIG. 17 is a side view showing the rotation operation cover extracted.

18 is a front view of FIG.

FIG. 19 is a sectional view taken along line 19-19 of FIG. 18;

FIG. 20 is a front view illustrating a retaining stopper extracted.

FIG. 21 is a sectional view taken along line 21-21 of FIG. 20;

FIG. 22 is a cross-sectional view corresponding to FIG. 4, illustrating a braking state of the throttle grip (a state in which the throttle opening is held).

FIG. 23 is a plan sectional view showing a second embodiment of the present invention and corresponding to FIG. 2;

FIG. 24 is an enlarged cross-sectional view showing a braking state (a state in which a throttle opening is held) of a throttle grip in the second embodiment.

[Explanation of symbols]

 (10) ・ Handle bar (17) ・ Extension tube (19) ・ Plug-in tube part (20) ・ Bolt head escape port tube part (21) ・ Flange part (24) ・ Mounting bolt (25) ・ Head Part (27), male screw (29), O-ring (30), cover ring (33), slide screw (34), brake shoe (35), return spring (38), pressing pin (39), slide ring ( 40) ・ Pressing spring (42) ・ Rotating operation cover (43) ・ Female screw (46) ・ Retaining collar (47) ・ Stopper flange (49) ・ Expansion collar (50) ・ Nut with seat (B) ・ Mounting base (G) Throttle grip (U) Throttle opening holding unit

Claims (4)

(57) [Claims] 1. A mounting base (B) which is removably inserted into and fixed to a distal end of a handlebar (10) which is rotatably operably fitted with a throttle grip (G) for controlling opening and closing of a throttle valve of an on-board engine. ), A brake shoe (34) supported by the mounting base (B) so that only the forward / backward slide can be performed with respect to the tip end surface of the throttle grip (G), and a throttle grip (34). (G), so that the mounting base (B) is pushed toward the tip end surface.
Rotating operation cover (42) screwed and fastened to move forward and backward
And the rotation operation cover (42) and the braking shoe (34).
And a pressing spring (40) for pressing the brake shoe (34) against the distal end surface of the throttle grip (G) by being interposed between the rotary operating cover (42) and the screw of the rotating operation cover (42). By the forward operation, the brake shoe (34) is pressed against the distal end face of the throttle grip (G) to elastically press the throttle shoe, thereby keeping the opening of the throttle valve constant, and in the holding state, the urging force of the pressing spring (40). A throttle opening holding unit for a motorcycle, wherein the throttle grip (G) is set so as to be able to be forcibly rotated by force. 2. A plurality of slide screws (33) and pressing pins (38) are alternately radially symmetrically distributed on a large-diameter flange portion (21) protruding from a mounting base (B). The brake shoe of the throttle grip (G) is provided at one end where each slide screw (33) is exposed toward the throttle grip (G) from the flange portion (21) of the mounting base (B). Attach and fix (34), and each slide screw (33) also has the flange (2).
The return spring (3) of the braking shoe (34) is provided at the other end exposed from the rotation operation cover (42) from the rotation shoe (1).
5), while each pressing pin (38) is also exposed from the flange portion (21) of the mounting base (B) toward the throttle grip (G) and the braking shoe (34). A pressing spring (40) of the braking shoe (34) is interposed between them, and each pressing pin (38) is similarly exposed from the flange portion (21) toward the rotating operation cover (42). The throttle opening holding unit for a motorcycle according to claim 1, wherein the other end is attached and fixed to a common slide ring (39) pushed forward by a rotation operation cover (42). 3. An outer peripheral surface of a large-diameter flange portion (21) projecting from the mounting base (B) is surrounded by a rotation operation cover (42) screwed to the mounting base (B). With the waterproof O-ring (29) inserted and installed on the fitting surface between the rotation operation cover (42) and the mounting base (B),
2. The throttle opening holding unit for a motorcycle according to claim 1, wherein accidental natural rotation of the rotation operation cover (42) with respect to the mounting base (B) is prevented. 4. A mounting bolt (24) having a mounting base (B) inserted through the center thereof to be fixedly integrated with the distal end of the handlebar (10), and a large head of the mounting bolt (24). The rotation operation cover (42) is attached to the mounting base (42) by the large-diameter stopper flange (47) of the retaining collar (49) sandwiched between the portion (25) and the tip of the mounting base (B). 2. The throttle opening holding unit for a motorcycle according to claim 1, wherein the unit is kept in a state of being prevented from falling off from B).