JPH0517471Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a two-wheeled vehicle that is interposed between the vehicle body and the axle to support the vehicle body while damping vibrations from the road surface.
It relates to suspension systems for vehicles such as four-wheeled vehicles.

[Conventional technology]

2. Description of the Related Art Vehicle suspension systems have been known in the past, in which a damper is interposed between a vehicle body and an axle to support the vehicle body while attenuating vibrations from the road surface, such as a rear suspension unit for a two-wheeled vehicle.

Accordingly, the applicant has developed, for example, those shown in FIGS. 4 and 5, in which the damping force adjustment of the damper is performed outside the damper.

This damper consists of a damper cylinder 1, a piston rod 2, and eye brackets 3 and 4 connected to the upper and lower ends of the damper. A bolt 6 for attachment to the vehicle body 9 passes through. A collar 7 is inserted into the outer periphery of the bolt 6, and a cam 8 is rotatably inserted into the outer periphery of the collar 7, so that the outer periphery of the cam 8 is removably fitted to the inner periphery of the eye bracket 3. It's summery.

In the above device, as shown in FIG. 4, when the cam 8 is located on the same axis as the piston rod 2 and is fitted to the inner circumference of the eye bracket 3, the cam 8 is stretched, so the piston rod 2 The elastic member 5 does not deform even if it is pushed up, and in this case, the spring constant K becomes K=∞. On the other hand, when the cam 8 is displaced 90 degrees by the drive of the lever 8a and is fitted at the position shown by the dotted line, the elastic member 5 becomes deformable in the axial direction of the piston rod 2, and when the damper is expanded and contracted, the elastic member 5 is pressed. The damping force characteristics that deform depending on the magnitude of the load and until the amount of deformation is regulated are different from the damping force characteristics after regulated.
Therefore, the damping force is adjusted by adjusting this amount of deformation.

[The problem that the idea aims to solve]

However, in the above suspension system, the cam 8 that regulates the amount of deformation of the elastic member 5 is exposed to the outside, and when the elastic member 5 deforms and the contact position between the eye bracket 3 and the cam 8 changes, the person There is a possibility that clothing or body parts may get caught. In addition, foreign matter tends to enter the inner periphery of the eye bracket 3 and the outer periphery of the cam 8, or the slight gap between the elastic member 5 and the cam 8, and the amount of regulation of deformation of the elastic member 5 changes, causing a change in the setting of the damping force. Not only may this change, but the cam 8 may not rotate smoothly.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a suspension device that can prevent clothing or a part of the human body from being caught in the gap between the eye bracket and the cam, and prevent foreign objects from entering the gap.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a suspension system in which an eye bracket is provided at one end of a damper, an elastic member is installed in the eye bracket, and damping force is adjusted by regulating the amount of deformation of the elastic member. , a cam that can be engaged with and detached from the inner periphery of the eye bracket is inserted in parallel with the elastic member into the eye bracket;
A collar is passed through the center of the elastic member and the cam in a direction orthogonal to each other, and the collar is provided with a bracket that faces the cam and supports a suspension spring, and a dial biased in the direction of the bracket is attached to and detached from the outer end of the bracket. The dial is freely attached, and the dial engages with the cam to transmit rotational movement of the dial to the cam.

[Effect]

When the outer circumference of the cam is in contact with the inner circumference of the eye bracket, there is no deformation of the elastic member, and when the cam is apart from the eye bracket, a damping force is generated due to the deformation of the elastic member. The dial rotates the eye and also serves as a cover to close the gap between the eye and the bracket.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

Suspension system A includes damper 12 and suspension spring 1
7, the damper 12 includes a damper cylinder 13, a piston rod 14 movably inserted into the damper cylinder 13 via a piston,
It consists of an eye bracket 15 fixed to the piston rod 14 via a socket 15a and an eye bracket 16 coupled to the damper cylinder 13.The damper 12 is attached to a vehicle body 20 such as a two-wheeled vehicle via the eye brackets 15, 16 and fixing bolts.
and is connected to the axle side.

An elastic member 22 having a low spring constant, such as rubber, is fitted into the eye bracket 15 and installed therein. A hollow collar 23 passes through the center of the eye bracket 15, and stays serving as a bracket 25 are fitted to the outer periphery of both ends of the collar 23.

A fixing bolt 18 is inserted through the center of the collar 23, and the bolt 18 connects the collar 23 and the bracket 25 to the vehicle body side.

The suspension spring 17 is attached to the seat 27 and the cover 26
The spring force of the suspension spring 17 is applied to the vehicle body 2 through these members.
Supported at 0.

A cam 28 is detachably inserted into the eye bracket 15 in parallel with the elastic member 22.
is rotatably supported on the outer periphery of the collar 23.

The eye bracket 15 has a thick wall portion 15a on the inner periphery.
15a and thin portions 15b, 15b are formed.

Two cam surfaces 28 are provided on the outer periphery 28a of the cam 28.
When the eye brackets b and 28b are expanded and the cam 28 is rotated, the cam surfaces 28b and 28b selectively come into contact with the thick portions 15a and 15a of the eye bracket 15. In other words, the cam 28 is capable of engaging and disengaging from the inner periphery of the eye bracket 15.

A part of the bracket 25 faces the outer surface of the cam 28, and the outer end of the bracket 25 has the bracket 2
Dial 29 that doubles as a cover biased in five directions
is attached removably.

The dial 29 has a main body 29a, a socket 29b which is a locking part provided on the outer periphery of the main body 29a, and a main body 29.
It has an engaging piece 29c provided at the lower part of a.

A locking piece 32 serving as a locking portion is attached to a part of the outer end of the cam 28.
protrudes, and this locking piece 32 fits into the socket 29b of the dial 29, so that the rotational movement of the dial 29 is transmitted to the cam 28.

The engagement between the dial 29 and the cam 28 is not limited to that shown in the drawings, as long as the rotational movement of the dial 29 is transmitted to the cam 28. dial 2
Reference numeral 9 serves as a cover for the cam 28, which closes the gap between the cam 28 and the eye bracket 15, and prevents foreign matter from entering this gap and from getting a part of the human body or clothes caught in the gap.

One end of a spring presser 30 is held between the flange of the collar 23 and the end surface of the bracket 25, and the outer end flange of the spring presser 30 and the engaging piece 2 of the dial 29
A spring 31 is interposed between the outer surface of 9c and
The spring 31 urges the dial 29 toward the bracket 25 via the engagement piece 29c.

Therefore, the engaging piece 29c is normally fitted into the hole of the bracket 25 under the tension of the spring 31, thereby preventing the dial 29 from rotating.

When the dial 29 is engaged with the bracket 25, the dial 29 and the cam 28 are stopped at a predetermined position, and the cam 28 is held in the position shown in FIG. 2 or 3.

If the cam 28 is now in the position shown in FIG. 2 and it is desired to move it to the position shown in FIG. 3, the dial 29
The engaging piece 2 is pulled outward against the spring 31.
9c is removed from the hole in the bracket 25, and then the dial 29 is rotated 90 degrees in one direction, whereby the cam 28 rotates 90 degrees via the socket 29b and the engaging piece 32, and settles into the position shown in FIG.

When the tension on the dial 29 is stopped in this state, the restoring force of the spring 31 reconnects the dial 29 to the bracket 25.

Cam surfaces 28b, 28 of the cam 28 as shown in FIG.
When b is located on the same axis as the piston rod 14, the cam 28 restricts the axial movement of the piston rod 14, but when the cam 28 is displaced 90 degrees to the position shown in FIG.
5, and the elastic member 22 becomes deformable in the axial direction of the piston rod 14. Therefore, when the piston rod 14 of the damper 12 operates on the expansion side or the compression side, the elastic member 22 is deformed by the magnitude of the expansion load, and the damping force characteristics until the amount of deformation is regulated and after the restriction are The damping force characteristics of the damper will be different, and by adjusting the amount of deformation, the damping force of the damper can be adjusted.

The repulsive force of the suspension spring 17 is borne by the vehicle body via the seat 27, cover 26, and bracket 25. Therefore, the repulsive force of the suspension spring 17 is transmitted only to the vehicle body 20 side, and is not directly transmitted to the piston rod 14, eye bracket 15, and elastic member 22. Therefore, the weight on the car body side on the spring changes,
Even if the repulsive force of the suspension spring 17 changes, the spring characteristics of the elastic member 22 do not change, and the desired damping force is always set.

[Effect of idea]

According to the present invention, there are the following effects.

Since the cam is linked to a dial that also serves as a cover, the dial drives the cam and the dial closes the gap between the cam and the eye bracket, preventing foreign objects from entering the gap or getting caught in parts of the human body or clothing. can be prevented.

The repulsive force of the suspension spring is carried by the vehicle body and does not act on the elastic member. Therefore, since the amount of deformation of the elastic member is only affected by the expansion load of the damper, the set damping force does not change due to the repulsive force of the suspension spring, making it possible to adjust the damping force as desired.

Since the elastic member is not subjected to the repulsive force of the suspension spring, durability is improved.

[Brief explanation of the drawing]

Fig. 1 is a partially longitudinal front view of a vehicle suspension system according to an embodiment of the present invention, Fig. 2 is a longitudinal side view of the eye bracket and cam, and Fig. 3 is a cam 90 degrees from the state shown in Fig. 2. FIG. 4 is a front view of the conventional suspension device, and FIG. 5 is a longitudinal side view of the cam portion shown in FIG. 4. 12...damper, 15...eye bracket,
17...Suspension spring, 20...Vehicle body, 22...
...Elastic member, 23...Collar, 25...Bracket, 28...Cam, 29...Dial.

Claims (1)

[Scope of utility model registration request] In a suspension system, an eye bracket is provided at one end of a damper, an elastic member is installed inside the eye bracket, and the damping force is adjusted by regulating the amount of deformation of the elastic member. A cam that can be engaged and detached from the inner periphery is inserted, a collar is passed through the center of the elastic member and the cam in a direction perpendicular to the cam, a bracket is provided on the collar that faces the cam and supports a suspension spring, and a bracket is attached to the outer end of the bracket. A suspension device in which a dial biased in the direction of the bracket is detachably attached, and the dial engages with the cam to transmit rotational movement of the dial to the cam.