JP3343592B2 - Axle position adjustment 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 an axle position adjusting device for a motorcycle.

[0002]

2. Description of the Related Art In a general motorcycle, a rear wheel is supported at a rear end portion of a swing arm extending rearward from a vehicle body frame, and the power of an engine mounted on the vehicle body frame is transmitted via a chain to the rear wheel. It is transmitted to the wheel.

An axle position adjusting device for adjusting the axle position of the rear wheel is provided at the rear end of the swing arm. 6 and 7 are a left side view and an exploded perspective view showing a part of a conventional axle position adjusting device.

In this axle position adjusting device 100, a swing arm 101 is provided at the rear end of the swing arm 101.
An axle insertion hole 102 having a long hole shape extending in the longitudinal direction of the axle is formed, and a scale display section 103 on which a scale is engraved is provided above the axle insertion hole 102.

The rear axle 104 is connected to the axle insertion hole 102.
The rear wheel axle 104 can be fixed at an arbitrary position in the longitudinal direction of the axle insertion hole 102 because the axle insertion hole 102 is formed in a long hole shape. Thereby, the tension of the chain can be adjusted (the amount of looseness can be adjusted).

The positioning of the rear wheel axle 104 is performed, for example, by adjusting the reference portion 106 of the positioning plate 105 inserted through the rear wheel axle 104 to the scale of the scale display portion 103. That is, the scale display unit 103 and the positioning plate 105 are provided on both left and right sides of the rear wheel,
If the reference portions 106 of the left and right positioning plates 105 are aligned with the same scale of the left and right scale display portions 103, the center plane of the rear wheel matches the center plane of the vehicle body frame, and the rear wheel is accurately positioned.

[0007]

However, when a bracket 107 for attaching a cushion unit (shock absorber) is welded to the rear end of the swing arm 101, the upper portion of the positioning plate 105 is attached to a welding bead 108 of the bracket 107. Are likely to interfere with each other, and it is difficult to engrave the scale display unit 103.
As shown in FIGS. 6 and 7, it is necessary to shift the welding position of the bracket 107 forward from the axle position adjusting device 100. Therefore, the degree of freedom of the installation position of the bracket 107 was low.

If it is necessary to weld the bracket 107 to the upper part of the axle insertion hole 102, the scale display 103
Needs to be lowered downward, which results in the upper portion of the positioning plate 105 overlapping the scale display portion 103. In this case, for example, when the rear wheel axle 104 is shifted toward either the front or the rear of the axle insertion hole 102, the front or rear of the scale display unit 103 is hidden by the positioning plate 105, and it is determined how much the remaining adjustment margin is. This makes it difficult to perform the work in positioning the axle.

When aligning the reference portions 106 of the left and right positioning plates 105 with the scale display portion 103, if the reference portion 106 is located in the middle of the scale of the scale display portion 103, the rear wheel axle 104 The position is determined by the amount of the eye, and the rear wheel axle 104 cannot be positioned with high accuracy. In addition, the positioning operation of the rear wheel axle 104 takes time, and the workability deteriorates.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has a high degree of freedom in the installation position of a cushion unit mounting bracket in a swing arm, and also positions the rear wheel axle on the swing arm with high precision. It is an object of the present invention to provide an axle position adjusting device for a motorcycle that can perform the positioning and has good workability at the time of positioning.

[0011]

According to a first aspect of the present invention, there is provided a motorcycle axle position adjusting apparatus according to the present invention. The axle position adjusting device for a motorcycle, wherein an elongated axle insertion hole extending in the direction is formed, and a rear axle inserted into the axle insertion hole can be fixed at an arbitrary position of the axle insertion hole. A positioning plate that moves along the axle insertion hole along with the axle is provided, while a scale display section with a graduation is provided on the swing arm, divided into front and rear parts around the center of the axle insertion hole, and the rear wheel axle is provided in the axle insertion hole. When moving along the reference plate, the position and length of the scale display unit are set so that the reference units provided at the front and rear of the positioning plate move within the range of the front and rear scale display units, respectively. And sets the scale interval of the scale display portion in the same, the distance between the front and rear scale display unit, characterized in that set are shifted 1/2 graduations with respect to the spacing of the nominal part of the front and rear the positioning plate.

Further, an elongated axle insertion hole extending in the longitudinal direction of the swing arm is formed in the rear wheel axle support portion of the swing arm, and the rear wheel is inserted into the axle insertion hole. In a motorcycle axle position adjusting device in which an axle can be fixed at an arbitrary position of an axle insertion hole, a positioning plate that moves along the axle insertion hole together with the rear wheel axle is provided, and a scale display unit with a scale is provided. Provided on the swing arm separately at the front and rear of the center of the axle insertion hole, when the rear wheel axle moves along the axle insertion hole, the reference parts provided at the front and rear of the positioning plate The position and length of the scale display unit are set so as to move within the range of the scale display unit, and one scale interval of the preceding and following scale display units is set to 1 / n of the scale interval of the other scale display unit. ,the above Characterized in that the set to an integer greater than one.

[0013]

According to the axle position adjusting device for a motorcycle constructed as described in claim 1, when the rear wheel axle is moved along the axle insertion hole, the front and rear of the positioning plate that moves together with the rear wheel axle. The provided reference portion moves within a range of a scale display portion provided before and after the center of the axle insertion hole.

In this axle position adjusting device, the scale display portion and the reference portion of the positioning plate can be provided below the axle insertion hole, so that the bracket for mounting the cushion unit can be welded to the rearmost end of the swing arm. Therefore, the degree of freedom of the bracket installation position is improved.

In addition, even if the rear wheel axle approaches the front or rear of the axle insertion hole, since one of the scale display portions is always widely exposed, it is possible to determine at a glance how much the remaining adjustment margin is. Thus, the workability in positioning the rear wheel axle is improved.

[0016] Even if one of the reference portions before and after the positioning plate is located at the middle of the scale of the scale display portion,
Since the other reference portion is located on the scale of the scale display portion or very close to the scale, the position of the rear wheel axle can be determined by the reference portion closer to the scale, and the position of the rear wheel axle can be determined. There is no need to determine the position based on the amount of eye, and the rear wheel axle can be positioned with high accuracy on the swing arm.

Further, when the axle position adjusting device is configured as in claim 2, one of the two scale display portions has a large scale interval and the other has a small scale interval. With this arrangement, the position of the rear wheel axle can be roughly adjusted by the scale display section having the larger scale interval, and the position of the rear wheel axle can be accurately determined by the scale display section having the smaller scale interval. For this reason, workability at the time of positioning the rear wheel axle is greatly improved.

In addition, since the scale interval of one scale display is set to 1 / n of the scale interval of the other scale display, as the value of n increases, the positioning accuracy of the rear wheel axle becomes n = 1. Is improved by a factor of n compared to the case of

[0019]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a left side view of a motorcycle to which an axle position adjusting device according to the present invention is applied. This motorcycle 1
The engine 3 is mounted on the front half of the body frame 2, the fuel tank 4 is installed above the engine 3, and a seat 5 is placed on the rear of the fuel tank 4.

A front fork 7 for supporting a front wheel 6 is pivotally mounted on a front head of the body frame 2 together with a handle bar 8 so as to be rotatable left and right, while a pivot shaft 10 provided substantially at the center of the body frame 2 is mounted on a front fork 7. A swing arm 11 extending rearward is pivotally supported so as to be vertically rotatable, and a rear wheel 12 is pivotally supported at the rear end of the swing arm 11.

A cushion unit 13 is connected between the rear end of the swing arm 11 and the vehicle body frame 2. Is restored. The power of the engine 3 is the power of the chain 1
4 to the rear wheel 12.

FIG. 2 is a left side view of the axle position adjusting device 15 in which the II part of FIG. 1 is enlarged, FIG. 3 is an exploded perspective view of the axle position adjusting device 15, and FIG. 4 is an IV-IV of FIG. FIG. 3 is a longitudinal sectional view of the axle position adjusting device 15 along a line.

The swing arm 11 is formed so as to sandwich the left and right sides of the rear wheel 12 by using a square pipe. The rear end of the swing arm 11, that is, the rear end of the swing arm 11, A long axle-shaped axle insertion hole 16 extending in the longitudinal direction is formed. Scale display portions A1 and A2, each of which has a vertical scale, are formed below the axle insertion hole 16 around the center of the axle insertion hole 16. It is engraved separately.

The scale intervals and lengths of the scale display portions A1 and A2 are set to be the same, and the length of the scale display portions A1 and A2 is set slightly longer than the length of the axle insertion hole 16. A bracket 17 for attaching the cushion unit 13 is welded to the upper surface of the rear end of the swing arm 11.

The rear wheel axle 20 is formed, for example, in the form of a long bolt, inserted into the axle insertion hole 16 and fastened with a nut (not shown) so that it can be fixed at any position in the axle insertion hole 16. . An adjuster 21 is inserted into the swing arm 11 in advance, and the rear axle 20
Is inserted through the insertion hole 22 of the adjuster 21. The adjuster 21 has an adjusting screw 23 extending rearward.
The adjust screw 23 penetrates a stopper 24 provided so as to close the rear opening of the swing arm 11, and an adjust nut 25 is screwed into the penetrated portion.

A positioning plate 27 is provided on the rear wheel axle 20. The positioning plate 27 is formed to have, for example, an L-shaped cross-section in contact with the outer surface and the bottom surface of the swing arm 11, and has an axle hole 28 through which the rear wheel axle 20 is densely inserted. . Further, end faces perpendicular to the longitudinal direction of the swing arm 11 are formed at front and rear ends of the positioning plate 27, and these end faces serve as reference portions B1 and B2, respectively.

FIG. 5A shows a basic embodiment of the present invention. The interval L1 between the scale display portions A1 and A2
Is set equal to the interval L2 between the reference portions B1 and B2. For example, when the reference portion B1 overlaps the center scale of the scale display portion A1, the reference portion B2 also overlaps the center scale of the scale display portion A2. It is positioned as follows.

When adjusting the position of the rear wheel axle 20 to adjust the tension of the chain 14, the adjust nut 25 is first loosened to the vicinity of the rear end of the adjusting screw 23, and then the rear wheel axle 20 is fastened. To temporarily move the rear wheel axle 20 to the frontmost portion of the axle insertion hole 16 and then lightly fasten the rear wheel axle 20. Thereafter, when the left and right adjustment nuts 25 are gradually tightened, the adjuster 21 is retracted by the screw action, and the rear wheel axle 20 is pulled rearward to adjust the tension of the chain 14.

As described above, the rear wheel axle 20 is
Along with the rear wheel axle 20, the positioning plate 27 moves along with the reference portion B of the positioning plate 27.
1 and B2 move within the range of the scale display sections A1 and A2, respectively. Therefore, if the positions of the left and right positioning plates 27 are adjusted while checking the position of the reference portion B1 or B2 with the scale display portion A1 or A2, the rear wheel 12 is correctly positioned on the swing arm 11. afterwards,
The position of the rear wheel 12 is fixed by tightening the rear wheel axle 20.

The axle position adjusting device 1 configured as described above
In the case of 5, since the scale display portions A1, A2 and the reference portions B1, B2 of the positioning plate 27 can be provided below the axle insertion hole 16, the upper portions of the scale display portions A1, A2 and the positioning plate 27 are cushion units. There is no fear of interference with the welding bead 29 of the bracket 17 for mounting the bracket 17, and the bracket 17 can be welded to the rearmost end of the swing arm 11.

Furthermore, even if the rear wheel axle 20 is shifted to the front or the rear of the axle insertion hole 16, one of the scale display portions A1 or A2 is always widely exposed, so that there is a remaining adjustment margin. Can be determined at a glance, and workability in positioning the rear wheel axle 20 is improved.

As shown in FIG. 4, a groove 30 along the longitudinal direction of the swing arm 11 is formed inside the lower portion of the positioning plate 27, and the groove 30 is located at a position overlapping the scale display portions A1 and A2. Is provided. As a result, the scale display portions A1 and A2 can be seen obliquely from the entrance of the groove 30, and the rest of the adjustment margin can be more easily confirmed.

FIG. 5B shows a first embodiment of the present invention. Axle position adjusting device 31 shown in this embodiment
In the case of, the scale interval and length of the front and rear scale display portions A1 and A2 are set to be the same as those of the axle position adjusting device 15 of the first embodiment, but the interval L1 of the scale display portions A1 and A2 is Are set to be shifted by 1/2 scale with respect to the interval L2 between the reference portions B1 and B2.

In this case, for example, even if one of the reference portions B2 is located in the middle of the scale of the scale display portion A2, the other reference portion B1 is on or very close to the scale of the scale display portion A1. Will be located. Therefore, the position of the rear wheel axle 20 can be determined by the reference portion closer to the scale (here, the reference portion B1), and it is not necessary to determine the position of the rear wheel axle 20 based on the scale. Therefore, the rear wheel axle 20 can be positioned with high accuracy on the swing arm. Further, even if the interval between the scales of the scale display portions A1 and A2 is widened, the accuracy does not decrease.

FIG. 5C shows a second embodiment of the present invention. In the axle position adjusting device 41 shown in this embodiment, the scale interval of one scale display unit (for example, A2) is set to 1 / n of the scale interval of the other scale display unit (for example, A1). The above-mentioned n is set to an integer larger than 1, and here, for example, n = 2, that is, the scale interval of the scale display unit A2 is set to の of the scale interval of the scale display unit A1.

In this case, two scale display sections A
One of the scale intervals of A1 and A2 is large, and the other is small. Therefore, first, the position of the rear wheel axle 20 is roughly adjusted by the scale display unit (here, A1) having the larger scale interval, and then the position of the rear wheel axle 20 is set by the scale display unit (A2) having the smaller scale interval. Can be determined accurately, and workability at the time of positioning the rear wheel axle 20 is greatly improved.

In addition, the scale interval of one scale display section (A2) is １ ／ of the scale interval of the other scale display section (A1).
(In the case of this embodiment), the rear axle 2
The positioning accuracy of 0 is improved twice. Here, rear wheel axle 2
The positioning accuracy of 0 increases as the value of n increases.
It improves by n times compared to the case of n = 1.

[0038]

As described above, according to the axle position adjusting device for a motorcycle according to the present invention, the scale display portion and the reference portion of the positioning plate are provided below the axle insertion hole so that the cushion unit can be mounted. The bracket can be welded to the rearmost end of the swing arm, improving the degree of freedom of the bracket installation position, improving the workability at the time of positioning the rear wheel axle, and judging the position of the rear wheel axle by the scale. This eliminates the need for positioning the rear wheel axle on the swing arm with high accuracy.

[Brief description of the drawings]

FIG. 1 is a left side view of a motorcycle to which an axle position adjusting device according to the present invention is applied.

FIG. 2 is a left side view of the axle position adjusting device in which a portion II in FIG. 1 is enlarged.

FIG. 3 is an exploded perspective view of the axle position adjusting device.

FIG. 4 is a longitudinal sectional view of the axle position adjusting device along the line IV-IV in FIG. 2;

FIG. 5 is a left side view of the axle position adjusting device according to the present invention, in which (a) shows a basic embodiment of the present invention,
(B) is a diagram showing a first embodiment of the present invention, and (c) is a diagram showing a second embodiment of the present invention.

FIG. 6 is a left side view of an axle position adjusting device showing a conventional technique.

FIG. 7 is an exploded perspective view of an axle position adjusting device showing a conventional technique.

[Explanation of symbols]

 Reference Signs List 1 motorcycle 11 swing arm 13 cushion unit 14 chain 15, 31, 41 axle position adjustment device 16 axle insertion hole 17 bracket for mounting cushion unit 20 rear wheel axle 21 adjuster 27 positioning plate A1, A2 Scale display unit B1, B2 Reference Part L1 Distance between scale display parts A1 and A2 L2 Distance between reference parts B1 and B2

Claims (2)

(57) [Claims] An elongated axle insertion hole extending in the longitudinal direction of the swing arm is formed in a rear axle support portion of the swing arm, and a rear axle inserted into the axle insertion hole is positioned at any position of the axle insertion hole. In the axle position adjusting device for a motorcycle that can be fixed at, a positioning plate that moves along the axle insertion hole together with the rear wheel axle is provided, and a scale display portion with a graduation is provided at the center of the axle insertion hole. When the rear axle moves along the axle insertion hole, the reference parts provided at the front and rear of the positioning plate move within the range of the front and rear scale display parts when the rear wheel axle moves along the axle insertion hole. The position and length of the scale display section are set so that the scale intervals of the front and rear scale display sections are set to be the same, and the interval between the front and rear scale display sections is the same as the reference section before and after the positioning plate. An axle position adjusting device for a motorcycle, wherein the axle position is shifted by 1/2 scale with respect to the interval. 2. An elongated axle insertion hole extending in a longitudinal direction of the swing arm is formed in a rear wheel axle support portion of the swing arm, and a rear axle inserted into the axle insertion hole is positioned at any position of the axle insertion hole. In the axle position adjusting device for a motorcycle that can be fixed at, a positioning plate that moves along the axle insertion hole together with the rear wheel axle is provided, and a scale display portion with a graduation is provided at the center of the axle insertion hole. When the rear axle moves along the axle insertion hole, the reference parts provided at the front and rear of the positioning plate move within the range of the front and rear scale display parts when the rear wheel axle moves along the axle insertion hole. The position and length of the scale display section are set so that one of the scale display sections of the front and rear scale display sections is 1 / n of the scale interval of the other scale display section, and the above n is an integer greater than 1. Set An axle position adjusting device for a motorcycle.