JPH0534095U - Motorcycle handle device - Google Patents

Abstract

(57) [Abstract] [Purpose] The inner weight is fixed to the inside of the handle pipe, and the outer weight attached to the outside of the handle pipe is used as a dynamig tamper to reduce vibration in a specific rotation range and handle at high speeds. To obtain a handle device for a motorcycle that can reduce the vibration force of the pipe and reduce the vibration as a whole. [Structure] The inner weight 3 is fixed to the inside of the end of the handle pipe 2 which is attached to the upper end of the front hawk and extends to the left and right, and the first rubber cylinder 4 is inserted to the outside thereof, and the second rubber cylinder 5 is attached to the end of the handle pipe 2. Insert the outer weight 6 into the core hole 7
The spacer 9 is inserted into the screw 8 that has been passed through and is inserted into the second rubber cylinder 5, and the inner end of the screw 8 is screwed to the inner weight 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a handle device for a motorcycle that reduces vibration of the handle.

[0002]

[Prior Art]

 The motorcycle has a handle pipe extending to the left and right at the center of the upper end of the front hawk, and the handle is rotated left and right to steer the front wheels attached to the front hawk. . Since the handle pipe receives the driving vibration of the engine and the like through the vehicle body and the front fork, and is provided so as to project particularly to the left and right, the both ends of the handle pipe have a disadvantage that the vibration is enlarged.

Therefore, a weight of a metal piece is attached to the inner or outer end of the handle pipe to change the natural frequency of the handle pipe to reduce the vibration. Further, as shown in FIG. 4, there is also a dynamic damper in which a weight B is attached to an end of a handle pipe A via a rubber cylinder C. See, for example, Japanese Utility Model Laid-Open No. 60-103086.

[0004]

[Problems to be solved by the device]

 In the case where the weight is fixed to the handle pipe, resonance occurs in a specific engine rotation range, and there is a problem that vibration is large in this specific rotation range. In addition, the dynamic damper in which the weight is attached to the handle pipe via rubber has a problem that vibration becomes large in a high engine speed range where the vibration force of the handle pipe becomes large.

In view of such a point, the present invention fixes the inner weight on the inside of the handle pipe, and uses the outer weight attached to the outside of the handle pipe as a dynamic damper to reduce the vibration in a specific rotation range and reduce the vibration in a high speed range. It is an object of the present invention to provide a handlebar device for a motorcycle that can reduce the vibration force of the handlebar in the vehicle and reduce the vibration as a whole.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the handle device of the motorcycle of the present invention has an inner weight fixed to the inside of the end of the handle hype which is attached to the upper end of the front fork and extends to the left and right, and the first rubber cylinder is attached to the outside thereof. Insert the second rubber cylinder into the end of the handle pipe, insert the spacer into the screw that passes through the core hole of the outer weight, and insert into the second rubber cylinder, and screw the inner end of the screw to the inner weight. There is something I did.

[0007]

[Action]

 The inner weight is a fixed weight and causes resonance in a specific rotation range, but since the outer weight is a dynamic damper, resonance can be reduced. The outer weight tries to increase the exciting force of the handle pipe in the high speed range, but the inner weight can reduce the increase. In this way, it is possible to reduce the vibration of the handle pipe as a whole.

[0008]

【Example】

 Hereinafter, an embodiment of the present invention will be described with reference to FIGS. At the upper end of the front hawk 1, attach the center part of the handle pipe 2 that extends left and right. The inner weight 3 is inserted and fixed inside the end portion of the handle pipe 2. Then, the first rubber cylinder 4 is inserted outside the inner weight 3. A second rubber tube 5 is inserted at the end of the handle pipe 2. In the outer weight 6, the screw 8 is inserted into the core hole 7, the spacer 9 is inserted into the screw 8, and the outer weight 6 is passed through the second rubber cylinder 5. Then, the inner end of the spacer 9 is passed through the washer 10 attached to the end face of the first rubber cylinder 4, and the inner end of the screw 8 is screwed into the screw hole 11 formed in the end of the inner weight 3.

If only the inner weight is used, as shown by X-rays in FIG. 2, resonance occurs in a specific rotation range, and vibration peaks occur. Further, if only the dynamic damper is used, as shown by the Y line in FIG. 2, the peak of vibration in the specific rotation range can be reduced, but as the rotation speed increases, the excitation force increases and the vibration increases. On the other hand, in the present proposal, as shown by the Z 2 line in FIG. 2, it is possible to reduce the vibration in the specific rotation range and to reduce the vibration increase at high speed.

[0010]

[Effect of the device]

 As described above, since the present invention is configured as described above, by fixing the inner weight to the fixed weight and the outer weight to the dynamic damper, the resonance in the specific rotation range is reduced and the high speed rotation is suppressed. The excitation force can be held down to a small level, resulting in a handle with low vibration.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an end portion of a handle pipe showing an embodiment of the present invention.

FIG. 2 is a graph showing vibration measurement values of an embodiment of the present invention and a conventional fixed weight and a dynamic damper.

FIG. 3 is an overall perspective view showing attachment of a handle pipe.

FIG. 4 is a longitudinal sectional view of a handle pipe end portion showing a conventional example.

[Explanation of symbols]

 1 Front Hawk 2 Handle Pipe 3 Inner Weight 4 First Rubber Tube 5 Second Rubber Tube 6 Outer Weight 7 Core Hole 8 Screw 9 Spacer

Claims (1)

[Scope of utility model registration request] 1. An inner weight is fixed to the inside of the end portion of a handle pipe that is attached to the upper end of the front hawk and extends to the left and right, the first rubber tube is inserted to the outside thereof, and the second rubber tube is inserted to the end of the handle pipe. A handle device for a motorcycle characterized in that a spacer is inserted into a screw passing through a core hole of an outer weight, the spacer is inserted into a second rubber cylinder, and an inner end of the screw is screwed to an inner weight.