JPH063792U - Bicycle shock absorber - Google Patents

Abstract

(57) [Abstract] [Purpose] While riding a bicycle, when passing a road with a large step, the impact of the step is absorbed so that the driver can easily pass without raising his waist, Make your heart feel better. [Structure] A fixed frame 7 is fixed to an upper portion of a saddle receiving frame 1a and protrudes rearward, an axle support rod 11 is vertically movably connected to a lower portion and protrudes rearward, and a rear wheel 3 is attached to a rear end of the axle support rod 11. The axle 13 is supported, and a shock absorber 14 is installed between the rear end of the fixed frame 7 and the axle 13. [Effect] Since the distance between the fixed frame 7 and the axle 13 can be made longer, the cushioning property can be enhanced by installing the shock absorber 14 having a long stroke between them.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a shock absorber for a bicycle.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, there has been a bicycle shock absorber in which a spring is attached to a lower portion of a saddle.

[0003]

[Problems to be solved by the device]

 In the above conventional shock absorber, since the spring has a small amount of deflection, it is not possible to absorb the impact when passing through a large step portion, for example, a curb portion that separates the sidewalk and the roadway. , The driver has to raise his waist, which is inconvenient.

Therefore, the present invention proposes a shock absorber for a bicycle, which is provided with a shock absorber having a large stroke so as to improve the cushioning property so that the shock absorber can pass through a road having a large step or a rough road. That is the purpose.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is directed to a first invention, in which a fixed frame (7) is fixed to an upper portion of a saddle receiving frame (1a) so as to project rearward, and an axle support rod (11) is provided at a lower portion. The axle (13) of the rear wheel (3) is rotatably supported at the rear end of the axle support rod (11) by being rotatably connected vertically and protruding rearward, and the axle (13) and the fixed frame (7). ) Is connected with a rear end by a shock absorber (14).

A second invention is based on the above-mentioned structure, wherein one plate (16) is rotatably provided at one end of the shock absorber (14) and the other plate (17) is rotatably provided at the other end. Provided are means for connecting the other ends of these plates (16) (17) to each other so that they can rotate relative to each other, and for providing a means for adjusting the rotational frictional force of the plates (16) (17) at the connecting part. It is characterized by.

[0007]

[Action]

 When the driver sits on the saddle (4) and drives through a stepped road and a large upward force is shocked to the rear wheel (3), the spindle (12) is centered. The rear wheel (3) supported by the vertically moving axle support rod (11) then moves upward by compressing the shock absorber (14) installed between the axle (13) and the fixed frame (7). To do.

Since the gap between the axle (13) and the fixed frame (7) can be set large, by installing a shock absorber (14) having a long stroke between them, the length of vertical movement of the rear wheel (3) can be increased. And the cushioning property can be increased.

Further, in the invention of claim 2, the means for adjusting the rotational frictional force is operated to change the rotational frictional force of both the plates (16) and (17), thereby extending the shock absorber (14). It is possible to suppress shrinkage and adjust cushioning properties.

[0010]

【Example】

 In the embodiment of the present invention shown in the drawings, 1 is a body frame, 1a is a saddle receiving frame, 1b is a handle frame, 2 is front wheels, 3 is rear wheels, 4 is a saddle, 5 is a saddle receiving frame 1a. It is a fixed petal shaft, on which the petal 6 is rotatably provided.

Reference numeral 7 denotes a fixed frame that is fixed to the saddle receiving frame 1a and projects rearward, and 8 is a reinforcing material that reinforces the fixed frame 7. The front end is fixed to the saddle receiving frame 1a and the rear end is supported. It is connected to the rear end of the fixed frame 7 by a shaft 10.

Reference numeral 11 denotes an axle support rod, the front end of which is vertically movably connected to the petal receiving shaft 5 by a support shaft 12, and the rear end of which supports the axle 13 of the rear wheel 3 rotatably.

Reference numeral 14 denotes a shock absorber, in which the inner and outer double cylinders 14a and 14b are slidably fitted, a spring member 14c is housed therein, and an upward load acting on the inner cylinder 14a is accommodated by the spring member 14c. It is designed to absorb. The lower end of the inner cylinder 14a is rotatably connected to the axle 13, and the upper end of the outer cylinder 14b is rotatably connected to the support shaft 10.

Reference numeral 15 denotes a buffering force adjusting mechanism, which includes one plate 16 whose base end is rotatably connected to the axle 13 and the other plate 17 whose base end is rotatably connected to the support shaft 10, respectively. At the other end of the pin 18, they are superposed and connected by a pin 18, and as shown in FIG. 4, a coil spring 19 is fitted to the projecting part of the pin 18 and a nut 20 is screwed to the external thread part 18a. Is configured.

Each member such as the axle support rod 11, the shock absorber 14 and the adjusting mechanism 15 is provided on the left and right of the bicycle.

With the above-described configuration, when the driver sits on the saddle 4 and drives, the front wheel 2 moves up and down due to the step when the vehicle passes a stepped road. At this time, since the front wheel 2 moves up and down around the saddle 4, the up and down movement of the saddle 4 is small, and the impact on the driver is small.

Further, when an upward force is applied to the rear wheel by a step due to a step, the axle support rod 11 is provided so as to be vertically rotatable by the support shaft 12, so that the rear wheel 3 moves upward together with the axle 13. Then, along with this, the inner cylinder 14a of the shock absorber 14 moves upward while compressing and contracting the spring material 14c, and absorbs the shock. Since this amount of upward movement is large, the upward power to the saddle 4 is absorbed, and the impact on the driver is small.

Next, in the adjusting mechanism 15, when the nut 20 is tightened and the coil spring 19 is pressed and contracted, the rotational frictional force between the one plate 16 and the other plate 17 at the pin 18 portion thereof becomes large, so that the impact force against the impact force is increased. The amount of shrinkage of the shock absorber 14 is suppressed. Therefore, the cushioning property can be reduced by this adjustment.

On the contrary, by loosening the nut 20, the rotational frictional force between the plates 16 and 17 is reduced, and the cushioning property can be increased.

[0020]

[Effect of device]

 As described above, according to the present invention, since a shock absorber having a long stroke can be attached to the rear wheel portion to enhance cushioning performance, the driver does not need to move the waist even when traveling on a passage with a large step or a bad road. You can easily pass while sitting without raising the ride, and you can improve your riding comfort.

According to the invention of the second item, the cushion can be adjusted.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a main part of the present invention.

FIG. 3 is a plan view showing a mounting portion of an axle support rod according to the present invention.

FIG. 4 is a plan view of a cushion adjusting unit according to the present invention.

[Explanation of symbols]

 1a saddle receiving frame 3 rear wheel 13 axle 14 shock absorber 15 adjusting mechanism 16, 17 plate

Claims (2)

[Scope of utility model registration request] 1. A fixed frame (7) is fixed to the upper part of a saddle receiving frame (1a) so as to project rearward, and an axle support rod (11) is vertically rotatably connected to the lower part so as to project rearward. An axle (13) of the rear wheel (3) is rotatably supported at the rear end of the support rod (11), and a shock absorber (14) is provided between the axle (13) and the rear end of the fixed frame (7). ) A shock absorber for a bicycle characterized by being connected by. 2. A fixed frame (7) is fixed to the upper part of the saddle receiving frame (1a) so as to project rearward, and an axle support rod (11) is connected to the lower part so as to be vertically rotatable so as to project rearward. An axle (13) of the rear wheel (3) is rotatably supported at the rear end of the support rod (11), and a shock absorber (14) is provided between the axle (13) and the rear end of the fixed frame (7). ), And one plate (1
6) is rotatably provided, the other plate (17) is rotatably provided at the other end, and the other ends of both plates (16) (17) are rotatably connected to each other and to the connecting portion. A shock absorber for a bicycle, comprising means for adjusting a rotational frictional force of both plates (16) and (17).