JP3496865B2 - Stepping device for motorcycle - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a step device for a motorcycle, which is capable of suppressing vibration with a relatively simple structure.

[0002]

2. Description of the Related Art In order to prevent vehicle body vibrations from being transmitted to a rider (driver) or passengers, a step bracket with steps is rubber-mounted on a vehicle body frame,
It is known that a weight is attached to the step itself. Also, by attaching a weight to the step bracket and shifting the resonance point with the step, it is possible to use vibration isolation without using rubber, or to provide a foot cover via an elastic member on the surface side of the step to block vibration. It is known.

[0003]

By the way, when the step bracket is rubber-mounted on the vehicle body frame, the occupant may feel a lack of rigidity. Therefore, the rigid mounting is preferable. Further, if a weight is attached to the step itself, in a vehicle having a main step (rider step) and a pillion step (passenger step), the weight must be attached to each of the steps, which increases the weight and the number of parts.

Further, even when the step bracket is provided with a weight, it does not absorb the vibration itself, so that the vibration of the step bracket remains and noise and loosening of the fastening portion occur. In addition, when the main step and the pillion step are provided on the same step bracket as described above, the weight must be adjusted so as to avoid the resonance point between them, which makes setting more difficult.

[0005]

In order to solve the above problems, a first invention relating to a step device for a motorcycle according to the present invention is to attach a main step and a pillion step to the front and rear of a step bracket supported by a vehicle body frame. In the motorcycle, the step bracket includes a base portion attached to the vehicle body, and an arm portion that continuously extends rearward from the base portion. The main step is connected to the connecting portion provided on the base portion, and the arm portion is provided. the pillion is connection for connecting the step formation, the free end of the guard portion provided projecting from the connecting portion, Rutotomoni here provided a dynamic damper, the dynamic damper
Is the elasticity that fits into the mounting hole provided in the guard section.
Member and dynamic damper for the guard part
It is characterized in that it is provided with a weight which doubles as an attaching means .

Further, in the first invention, the bullet
The thickness of the flexible member is the same as the thickness of the guard part around the mounting hole.
Is formed thicker and penetrates the mounting hole in the thickness direction.
However, both sides in the thickness direction are projected from both sides of the guard portion .

According to a second invention, in the first invention, the weight is a pair of pins for sandwiching the elastic member from the left and right.
Tighten the rate and these three members with the fastening member via the collar.
It is characterized by being tied .

[0008]

[0009]

According to the first aspect of the present invention, by attaching a weight to the step bracket via an elastic member, the elastic member and the weight constitute a dynamic damper, and the dynamic damper suppresses the vibration of the step bracket itself. . Therefore, vibration of the vehicle body is less likely to be transmitted to the step, and the step bracket can be rigidly mounted on the vehicle body frame, so that an appropriate sense of rigidity can be obtained. Moreover, the same step bracket
Attach main step and pillion step back and forth
However, there is no need to attach a weight to each step.
Therefore, it is possible to prevent the weight and the number of parts from increasing, and
There is no need to adjust the weight by adjusting the balance.

[0010] Moreover, in installing an additional weight via the elastic member to the mounting hole of the guard portion of the step bracket
A dynamic damper can be attached, and since this part is the part where the vibration is most likely to be large, the vibration can be efficiently damped. At this time, the elastic member is
Formed thicker than the wall thickness of the surrounding guard part and mounted in the thickness direction
By passing through the hole, both sides of the thickness direction of the guard part
It projects from both sides.

According to the second aspect of the invention, the elastic member is fitted into the mounting hole formed in the guard portion of the step bracket,
Hold the left and right sides of this elastic member with pressing plates,
Since the dynamic damper can be attached to the step bracket by fastening the member with the fastening member via the collar, the dynamic damper can be configured with a simple structure and can be detachably attached, which is excellent in maintainability. Also, the weight of the dynamic damper
Tighten a pair of plates and fasten them with a collar.
It can be configured with a connecting member, and by changing the height of the plate and the hardness of the elastic member, any vibration frequency can be supported.

[0012]

[0013]

1 is a side view of a step apparatus according to the present embodiment, FIG. 2 is a side view of a rear half of a motorcycle equipped with the step apparatus, and FIG. 3 is a plan view of the step apparatus. FIG. 4 is a side view of the elastic member, FIG. 5 is a plan view thereof, and FIG.
Is a side view of the pressing plate, FIG. 7 is a sectional view taken along line 7-7 of FIG. 6, FIG. 8 is an assembly view of the step device, and FIG. 9 is a graph showing the effect of the present invention.

As shown in FIG. 2, this motorcycle has an engine 1, a main frame 2 constituting a vehicle body frame,
A pair of pivot plates 4 provided on both right and left sides of the upper and lower parts 3, a rear swing arm 5 having a front end rotatably attached to the pivot plates 4, a rear wheel 6 rotatably supported at a rear end thereof, a main frame. 2, a fuel tank 7 supported on the seat 2, a seat 9 supported on a seat rail 8, and the like.

The main frame 2 is a single pipe-shaped member which is arranged in the front-rear direction above the engine 1 along the center of the vehicle body, and the rear half of the main frame 2 extends upward and downward so as to bend behind the engine 3. The engine 1 is supported by a main frame 2 and a pair of left and right pivot plates 4.

Further, step brackets 10 are attached to the middle portions of the left and right pivot plates 4 so as to project rearward, and a main step 11 is attached to the front side of each step bracket 10 and a pillion step 12 is attached to the rear side thereof. Has been.

As is apparent from FIGS. 2, 3 and 8, the step bracket 10 includes a base portion 13 having a substantially acute-angled triangular shape, and an arm portion 14 continuously extending obliquely upward and rearward from the base portion 13.
A boss portion 15 for fastening to the pivot plate 4 is provided at the top and bottom of the base portion 13, and a connecting portion 16 is formed at the lower portion so that the main step 11 can be undulatingly connected thereto. Has been done.

The arm portion 14 extends to the vicinity of a substantially middle portion of the rear swing arm 5, and a connecting portion 17 for connecting the pillion step 12 is erected up and down. The connecting portion 17 is directed to the inside of the vehicle body. The guard portion 18 that bends and projects further rearward has a free end, and a dynamic damper 20 is attached to an attachment hole 19 formed therein.

The dynamic damper 20 is composed of a rubber block 21, a pair of pressing plates 22 stacked on the left and right side surfaces of the rubber block 21, and a bolt 24 and a nut 25 that connect them via a collar 23. The rubber block 21 includes the dynamic damper 20. This is an elastic member that constitutes the dynamic damper 20, and is the weight of the present invention that constitutes the dynamic damper 20 with the pressing plate 22, the collar 23, the bolt 24, and the nut 25 as a whole.

As is apparent from FIGS. 1, 4 and 5, the rubber block 21 is formed such that its outer shape in side view (FIG. 4) is slightly larger than the mounting hole 19 and its thickness is thicker than that of the guard portion 18. An entire circumferential groove 26 into which the peripheral portion of the mounting hole 19 of the guard portion 18 is fitted is formed around the outer peripheral thick portion, and a through hole 27 of the collar 23 is formed on the side surface so as to penetrate in the thickness direction. There is.

As shown in FIGS. 1, 6 and 7, the pressing plate 22 is a metal plate having substantially the same shape as the rubber block 21, and the through hole 2 of the bolt 24 is located at a position corresponding to the through hole 27.
8 is formed.

As is apparent from FIGS. 1 and 8, the rubber block 21 is inserted into the mounting hole 19 and the mounting hole 19 of the guard portion 18 is inserted.
The peripheral portion is fitted into the entire circumferential groove 26 and temporarily fixed, and the collar 23
After passing through the through hole 27, the pressing plate 22 is overlaid on the left and right of the rubber block 21, the through holes 27 and 28 are aligned, and the bolt 24 and the nut 25 are fastened together. 20 is assembled.

The dynamic damper 20 is attached to the free end side of the step bracket 10 to which the vibration of the vehicle body is transmitted, so that the dynamic damper 20 has a vibration damping effect of suppressing the vibration of the step bracket 10 itself, and this purpose is realized. Therefore, the elasticity of the rubber block 21 and the weight of the weight are arbitrarily set according to conditions such as the shape of the step bracket 10 and the vibration characteristics of the vehicle body.

Next, the operation of this embodiment will be described. Figure 9
Is the invention of the present application in which the dynamic damper 20 is provided, the example in which only the weight is provided, and nothing is provided with the change in the engine speed 1 correlated with the vehicle body vibration as the horizontal axis and the change in the vibration acceleration in steps as the vertical axis. It is a graph which also shows the comparative example which does not take the vibration countermeasure.

As can be seen in this figure, the vibration acceleration of the present invention is significantly smaller than the others, which means that the step bracket 10 is well damped by the dynamic damper 20. means.

On the other hand, in the case of only the weight, the peak value of the vibration acceleration is slightly lowered, but the range of the large vibration acceleration is widened to a wide rotational speed range as compared with the present invention, so that the step bracket 10 of the present invention is used. It is understood that the damping effect is small, and only the step resonance point is set to lower the vibration level, and relatively large vibration is generated in a wide range of rotation speed.

Therefore, according to the present embodiment, by damping the step bracket 10 itself by the dynamic damper 20, it becomes difficult to transmit the vibration of the vehicle body to the main step 11 and the pillion step 12, and the step bracket 10 is pivoted. Since it can be rigidly mounted on the plate 4, an appropriate sense of rigidity can be obtained. Further, since the elastic force and the weight of the rubber block 21 are attached to the free end portion which is the guard portion 18 of the step bracket 10, since this portion is the portion where the vibration is most likely to occur, the step bracket 10 can be efficiently used. Can control vibration.

Moreover, the rubber block 21 is attached to the guard portion 18
The rubber block 21 is fitted in the mounting holes 19 of the two, and the left and right sides of the rubber block 21 are sandwiched by the pressing plates 22.
Since the dynamic damper 20 can be attached to the step bracket 10 by fastening it with the bolt 24 and the nut 25 via the, the dynamic damper 20 can be configured with a simple structure and can be freely attached and detached. It has excellent maintainability.

Moreover, since the weight is composed of the pressing plate 22, the collar 23, the bolts 24 and the nut 25, the mounting means of the dynamic damper 20 can be used as it is for the weight, so that the use efficiency of the parts is improved and the size of these parts is increased. The weight can be easily adjusted by appropriately changing the length.

Furthermore, even if the main step 11 and the pillion step 12 are attached to the same step bracket 10 in front of and behind, there is no need to attach a separate weight to each step, so that the weight and the number of parts can be prevented from increasing.
Moreover, unlike the case where only the weight is used, the trouble of adjusting the weight in consideration of the resonance point of each step does not occur.

The invention of the present application is not limited to the above-described embodiment, but can be modified in various ways. For example, the partner to which the step bracket 10 is attached is not limited to the pivot plate 4 but a part of a body frame of various types. Alternatively, it may be a vehicle body portion other than the vehicle body frame such as the case of the engine 1. Further, the elastic member forming the dynamic damper 20 is not limited to the rubber block 21, and various elastic materials and structures can be used as appropriate. Moreover, the weight does not have to use the collar 23 and the like, and the attachment can be performed using a known means other than the bolt and nut.

[Brief description of drawings]

FIG. 1 is a view showing a step device according to an embodiment with a part thereof cut away.

FIG. 2 is a side view of the latter half of a motorcycle to which the step device of the embodiment is applied.

FIG. 3 is a plan view of a step device.

FIG. 4 is a side view of the elastic member.

5 is a plan view of FIG.

FIG. 6 is a side view of the holding plate.

7 is a sectional view taken along line 7-7 of FIG.

FIG. 8 is an exploded view of the step device

FIG. 9 is a graph showing the effect of the present invention.

[Explanation of symbols]

2: Main frame, 4: Pivot plate, 10: Step bracket, 11: Main step, 12: Pillion step, 18: Guard part, 19: Mounting hole, 20:
Dynamic damper, 21: rubber block, 22: pressing plate, 23: collar, 24: bolt, 25: nut

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keikichi Shimokawa, 1-4-1 Chuo, Wako-shi, Saitama, Ltd. Inside Honda R & D Co., Ltd. (56) Reference JP-A-5-16853 (JP, A) JP-A-SHO 62-61888 (JP, A) JP 53-60462 (JP, A) JP 7-187044 (JP, A) JP 56-57580 (JP, A) JP 6-305468 (JP, A) Japanese Unexamined Patent Publication No. 9-71278 (JP, A) Japanese Unexamined Patent Publication No. 9-158981 (JP, A) Actual exploitation Sho 62-173294 (JP, U) Actual exploitation Sho 60-81187 (JP, U) Actual exploitation Flat 2 -99080 (JP, U) Actual development Sho 60-176987 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62J 25/00 F16F 15/00-15/36

Claims (2)

(57) [Claims] 1. A motorcycle in which a main step and a pillion step are attached to the front and rear of a step bracket supported by a vehicle body frame, wherein the step bracket is a base portion attached to the vehicle body,
An arm portion that continuously extends rearward from this is provided, a connecting portion for connecting the main step to the connecting portion provided on the base portion, and a connecting portion for connecting the pillion step to the arm portion is formed. The free end is the guard part that protrudes from the
In addition, the dynamic damper is provided in the guard section.
The elastic member fitted into the mounting hole and the dynamic damper mounting means for the guard
The elastic member has a weight that also serves as a weight.
It is formed thicker than the wall thickness of the guard part around the attachment hole, and
Penetrate the mounting hole in the thickness direction, and guard parts on both sides in the thickness direction.
A step device for a motorcycle, which is characterized in that it projects from both sides . 2. The weight holds the elastic member from the left and right.
Fasten a pair of plates and these 3 members via a collar
The step device for a motorcycle according to claim 1, wherein the step device includes a fastening member .