JP2968445B2 - Interlocked gear shifting mechanism for bicycles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interlocking shift operation mechanism for a bicycle. More specifically, the present invention relates to an interlocked speed change operation mechanism for a bicycle in which speed change levers are arranged at two grip positions of the same handle and both are interlocked.

[0002]

2. Description of the Related Art Bicycles have a multi-stage front
Bei example multi-stage sprocket rear provided with a chain wheel, for transmitting rotational torque coupled between this chain. Depending on the traveling speed, the chain can be split from multiple front chain wheels and multiple sprockets.
The optimal gear ratio is selected by selecting the combination of the chain wheel and sprocket to be bridged. This shift operation is usually performed by a shift lever of a shift operating device that can be operated from the grip position of the steering wheel.

[0003] On the other hand, for example downhill handle odor
In general , the grip position depends on whether you are running at normal speed or on a slope.
And different in the case of running at high speed while preventing the resistance of wind. However, since the speed change operation device is disposed only at a specific grip position, if the grip position is changed, the gear cannot be shifted from that position . Therefore, gear shifting operation must be performed.
If you do not have to change it has a grip position for cormorants
There is .

[0004] The change of the grip position is time-dependent .
In addition, the operability is impaired even in view of the function of disposing the grip at the two positions described above.

[0005]

[0008] The present invention has been Do under the above-described technical background, to achieve the following objectives.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bicycle interlocking speed change mechanism capable of performing a speed change operation from two grip positions of a steering wheel.

It is still another object of the present invention to provide an interlocking shift operation mechanism for a bicycle capable of performing a quick shift operation.

[0008]

The present invention has the following means to achieve the above object.

A first aspect of the present invention is an interlocking shift operation mechanism for a bicycle which can be mounted on a bicycle handle and operates a bicycle transmission by a wire in a cable to perform a shift. A mechanism, a second shift lever, and lever interlocking means are provided. The first shift lever mechanism is swingable about a first central axis and operates a first shift lever for operating a wire at a plurality of selected positions and a positioning for positioning the first shift lever at a plurality of positions. Means and can be mounted on the handle. The second shift lever pivots about a second central axis different from the first central axis.
A resident can be positioned at a first speed change lever and the distance to the handle. The lever interlocking means includes a first transmission lever and a second transmission lever.
This is a means for interlocking the shifting operation of the shift lever.

[0010] A second invention is a bicycle interlocking shift operation mechanism which can be mounted on a bicycle handle and operates a bicycle transmission by means of a wire in a cable to perform shifting. A mechanism, a second shift lever, and lever interlocking means are provided. The first shift lever mechanism includes a wire winding cylinder for winding the wire, and a first center.
A first speed change lever for swinging around the shaft and rotating the wire winding drum, and a positioning means for positioning the wire winding drum at a plurality of rotation positions are mountable on the handle. The second shift lever is different from the first central shaft
It is swingable around a second central axis and can be arranged on the handle at a distance from the first speed change lever. The lever interlocking means is means for interlocking the rotation of the wire bobbin with the shift operation of the second shift lever.

In the mechanism of the invention 1 or 2, the lever connection
Motion means comprises a first shift lever or ring ear winding cylinder and a second gear
Has a push-pull cable to link the lever
You may.

[0012]

In the mechanism of the present invention, the first and second shift levers are
It can be placed on the handle at a distance. 2nd gear lever
ー is the first shift lever or the wire winding cylinder and lever interlocking hand
It is linked by the steps. In addition, the wire winding cylinder is
Rotates with the bar. For this reason, the second shift lever or
By operating the first shift lever, these levers
Work in tandem, pulling the wires in the cable
Thus, a desired gear ratio is selected. The gear shifting operation of each lever
The working position is determined by the positioning means.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an oblique projection view of a handle provided with a bicycle interlocking speed change mechanism according to the present invention. FIG. 2 is a front view showing an attachment for fixing a push-pull cable for interlocking a shift operation lever and an interlocking shift lever to a handle.

A handle 1 shown in FIG. 1 is a handle for a mountain bike. The horizontally arranged stem member 2 is connected to a bicycle head pipe (not shown).
A cross member 4 is fixed to a stem bracket 3 at one end of the stem member 2. The cross member 4 is made of a metal pipe, and both ends are bent forward by about 90 degrees, and this portion constitutes side grip portions 5 and 6.

On the cross member 4, cylindrical grip members 7, 8 made of synthetic resin are arranged. Grip member 7,
8 is for driving operation by gripping in the normal running time of the handle operation. A front speed change operation device 9 and a rear speed change operation device 10 are arranged at lateral positions of the grip members 7 and 8. The front speed change operation device 9 is for selecting a chain wheel (not shown) for bridging a chain arranged at the front.

The rear shift operation device 10 is for selecting a multi-stage sprocket (not shown) arranged on the rear. Details of the structure and functions of the rear shift operation device 10 will be described later. By rotating the shift operation lever 11 of the rear shift operation device 10 , the cable
The wire in 12 is pulled and the rear derailleur
(Not shown) is driven to perform gear shifting.

[0017] an intermediate portion of the shift operating lever 11, one end of the push-pull wire 14 of the push-pull cable 13 is connected by a ball joint 16. The push-pull wire 14 of the push-pull cable 13 is a known one that can be driven even when pushed or pulled. Ball joint 16, Wa
A spherical member provided at one end of the ear 14;
From the socket provided on the 11 side that wraps the spherical member
And a known structure. In this ball joint 16
More, it is also possible to connect the flop <br/> Sshupuruwaiya 14 and shift lever 11 Oite to any angle of the shift lever 11.

An intermediate portion of the outer casing 15 of the push-pull cable 13 is gripped by an annular cable grip 17, and the cable grip 17 is fixed to a lower portion of a plate-shaped fixing bracket 18. The upper part of the fixing bracket 18 is fixed to one end of the grip member 8 with a nut 19. The other end of the push-pull cable 13 is connected to the interlock lever case 20.

FIG. 5 is an internal sectional view of the interlocking lever case. Push-pull cable 13 of interlocking lever case 20
The cable adjustment unit 21 is provided at the entrance of
You . The cable adjustment unit 21 is for finely adjusting the angular position of the interlocking shift operation lever 22 by relatively moving the outer casing 15 and the push-pull cable 13 therein. The interlocking shift operation lever 22 can swing about the center shaft 23 at the center position of the interlocking lever case 20.

One end of the push-pull cable 13 is connected to one end of the interlocking shift operation lever 22 via the same ball joint 24 as described above. Interlocking shift operation lever 2
At the other end of 2, an operation unit 25 for operating with a finger is provided in an L-shape. As understood from the above description, when the shift operation lever 11 is actuated, this actuation activates the push-pull cable 13 and interlocks the interlocked shift operation lever 22, so that the shift operation is performed by the shift operation lever 11 or the interlocked shift. By any of the operation levers 22
Can also be done.

<Rear transmission operating device 10> FIG. 3 is a sectional view showing the inside of the rear transmission operating device.
FIG. 4 is a partial cross-sectional view of the speed change lever when cut along the line IV-IV in FIG. The pedestal 30 constitutes a main body, and is fixed to the cross member 4 by a band member 31.
One end of the band member 31 is provided on the pedestal 30 so as to be swingable about a shaft 32, and the other end is fixed to the pedestal 30 with a bolt 33.

The pedestal 30 has a screw hole 35 formed therein.
The fixing bolt 34 is screwed into the screw hole 35.
A bottom cover 36, a washer 37, and a leaf spring 38 are fixed between the pedestal 30 and the fixing bolt 34. The bottom cover 36 is a bottom cover, and the leaf spring 38 is for pressing the positioning ball 39. The leaf spring 38 has a disk shape , and has a ball holding hole 40 formed in the radial direction for positioning and holding the positioning ball 39 (see FIG. 5).

Therefore, the positioning ball 39 is allowed to move only in the radial direction of the ball holding hole 40. A positioning plate 41 is arranged in a direction opposite to the leaf spring 38 with the positioning ball 39 interposed therebetween, and the positioning plate 41 is integrally fixed to an end surface of the rotating cylindrical member 42. Positioning plate 41
Are formed at the outer peripheral position of the device, three positioning holes 46 and a positioning hole 46 different from the positioning holes 46 by 180 degrees are formed. A total of six positioning holes 46 are formed. The three positioning holes 46 are
This corresponds to the low L, middle M, and top T positions of the transmission ratio of the front transmission.

[0024] Three single positioning ball 39 against the positioning holes 46, ie a total of two positioning balls 39 are inserted. Positioning hole 4 of positioning plate 41
A friction portion 47 is formed annularly on the inner periphery of 6. A clamp ring 50 is slidably disposed on the cylindrical portion 30a of the pedestal 30. A ball holding hole 51 is formed in the clamp ring 50 in the circumferential direction.
1, the positioning ball 39 is held.

The center position of the ball holding hole 51 is enlarged in the radial direction. For this reason, the positioning ball 39 in the ball holding hole 51 is moved in the radial direction by rotating the clamp ring 50, moves to the friction portion 47 of the positioning plate 41 , and is clamped. The rotary cylindrical member 42 is slidably and rotatably disposed on the cylindrical portion 30 a of the pedestal 30.

A coiled torsion spring 43 is disposed between the rotating cylindrical member 42 and the pedestal 30, one end of which is fixed to the rotating cylindrical member 42, and the other end of which is fixed to the pedestal 30.
You . The torsion spring 43 rotates in a direction opposite to the biasing force of a return spring (not shown) of a rear transmission (not shown).
The torque required for operating the speed change lever operating lever 11 is made uniform by urging 42 .

On the outer periphery of the rotating cylindrical member 42, the wire winding cylinder 4 is provided.
4 is fixed. A U-shaped concave portion 45 is formed on the outer periphery of the wire winding drum 44, and the concave portion 45 has a different radial distance depending on the angular position as shown in FIG. The speed change operation lever 11 is provided integrally with the wire winding drum 44, and the wire winding drum 44 can be turned by rotating the speed change operation lever 11.

The concave portion 45 of the wire winding drum 44 is for winding the push-pull cable 13. Since the radial distance differs depending on the angular position, when the shift operation lever 11 is operated, the lever ratio is changed depending on the angular position. different.

<Operation of Rear Gearbox 10> To operate the rear gearbox , the gearshift lever 1
1 is operated to rotate the wire winding drum 44. Wire winding drum 44
When turned , the push-pull cable 13 is wound around the concave portion 45, whereby the push-pull cable 13 is pulled.
The necessary gear change is performed . The wire cylinder 44 turns
Once, the rotating cylindrical member 42 and the positioning plate 41 integral therewith at the same time is also rotated. The positioning ball 39 is allowed to move only in the radial direction by the ball holding hole 40, but cannot move after all because the movement in the radial direction is restricted by the ball holding hole 51 of the clamp ring 50.

By the rotation, the stopped positioning ball 39 is inserted and positioned in the next positioning hole 46 of the positioning plate 41. That is, if the first position is the low L position , the shift operation lever 11 is moved to the next middle position M.
The winding drum 44, the rotating cylindrical member 42, and the positioning plate 41 are positioned.

To perform this positioning steplessly, the following operation is performed. When the clamp ring 50 is turned, the ball holding hole 5
1 tooling ball 39 is moved in the radial direction by the move to full <br/> Rikushon unit 47. By the friction part 47,
The positioning ball 39 fixes the positioning plate 41. Since the positioning plate 41 cannot rotate, the rotating cylindrical member 42 can be fixed at an arbitrary position.

[Other Embodiments] In the above embodiment, the shift operation lever 11 and the interlocked shift operation lever 22 are linked by the push-pull cable 13. This link may be linked by a hard member such as a rod.

[0033] In the above embodiment, although in conjunction with an interlocking shift operating lever 22 and the shift operating lever 11 in a push-pull cable 13, good <br/> doctor even if the interlocking in other ways. For example, the wire winding cylinder 44 and the interlocking shift operation lever 22
And a method of connecting the wire winding drum 44 and a winding drum (without wire) driven by the interlocking shift operation lever 22 with a rod or a push-pull cable.

At this time, the shift operation lever 11 and the interlocking shift operation lever 22 may be of a type that does not return to the original position each time the operation is performed.

[0035]

As described in detail above, according to the present invention, when the shift operation lever is operated, the interlocked shift operation lever is also operated in conjunction therewith, so that the shift operation can be performed at two positions within the same handle.
Can be done quickly .

[Brief description of the drawings]

FIG. 1 is an oblique projection view of a handle provided with a bicycle interlocking speed change mechanism according to the present invention.

FIG. 2 is a front view showing an attachment for fixing a push-pull cable for interlocking a shift operation lever and an interlocking shift operation lever to a handle.

FIG. 3 is a sectional view showing the inside of a rear shift operation device.

FIG. 4 is a partial cross-sectional view of the speed change lever when cut along a line IV-IV in FIG. 3;

FIG. 5 is an internal sectional view of an interlocking lever case.

FIG. 6 is a plan view of a leaf spring.

FIG. 7 is a plan view of a positioning plate.

FIG. 8 is a plan view of a clamp ring.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Handle 2 ... Stem member 3 ... Stem bracket 4 ... Cross member 9 ... Front speed change operation device 10 ... Rear speed change operation device 11 ... Speed change operation lever 13 ... Push-pull cable 22 ... Interlocking speed change lever

Claims (3)

(57) [Claims] An interlocking speed change operation mechanism for a bicycle that can be mounted on a bicycle handle and that operates a bicycle transmission by means of a wire in a cable to perform a shift, wherein the mechanism rotates about a first central axis. A first shift lever operable to operate the wire at a plurality of selected positions, and positioning means for positioning the first shift lever at the plurality of positions; A first transmission lever mechanism, and swingable about a second central axis different from the first central axis;
There, a bicycle, comprising: a second shift lever can be placed at a first speed change lever and the distance to the handle, and a lever interlocking means for interlocking the speed changing operation of the first shift lever and the second shift lever Interlocking shift operation mechanism. 2. An interlocking shift operation mechanism for a bicycle which can be mounted on a bicycle handle and operates a bicycle transmission by means of a wire in a cable to perform a shift, wherein the wire for winding the wire is provided. The winding drum and the first central axis
A first speed change lever for swinging around the wire winding cylinder and rotating the wire winding cylinder, and positioning means for positioning the wire winding cylinder at a plurality of rotation positions, which can be mounted on the handle. A first transmission lever mechanism, and swingable about a second central axis different from the first central axis;
A second shift lever that can be arranged at a distance from the first shift lever on the handle; a lever interlocking unit that interlocks rotation of the wire bobbin with a shift operation of the second shift lever; Gearshift operation mechanism for bicycles with 3. A bicycle interlocking shift operation according to claim 1, wherein said lever interlocking means has a push-pull cable for interlocking said first shift lever or wire winding drum with a second shift lever. mechanism.