JP2003240041A - Bump rubber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bump rubber capable of combining and using respective components having different size in response to various type. <P>SOLUTION: The bump rubber comprises three components, namely a bellows- like urethane bump 1, a rubber mount 2 having a projection 21 of an inner wall engaged with a groove 11 for mount disposed on the outer periphery of the upper end of the urethane bump 1 and a mounting hole 22 mounting it to a damper rod in its center, and a bellows-like dust boot 3 having in its upper end surface a collar 31 engaging with the groove 12 for the dust boot disposed in the outer periphery of the urethane bump 1. Respective components having at least two sizes and a common module can be combined. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bump rubber used in a vehicle such as an automobile and used for contacting a damper body.

[0002]

2. Description of the Related Art When a lowdown spring for lowering the height of an automobile is mounted and the passenger gets on the vehicle, the effective stroke of the suspension device is reduced, and in some cases, a thrusting phenomenon may occur. In order to improve this, a wide variety of bump rubbers and dust boots are required for each car model. And bump rubber and dust boots are integrated structure in the mount part,
Moreover, since the production quantity is small, the cost is extremely high. In addition, most of the conventional bump rubbers are made of rubber, which absorbs little impact and is uncomfortable to ride. Furthermore, there is a problem that the dust boot has a structure to be attached to a position below the bump rubber, and the adjustment range of the bump rubber length cannot be widened.

[0003]

SUMMARY OF THE INVENTION The present invention solves many of the problems described above, and also makes it possible for the user side to install parts of different sizes according to a wide variety of vehicle models that are more economical and preferable. A bump rubber that can be used in combination is provided.

[0004]

[Means for Solving the Problems] A urethane bump of a bellows-shaped urethane shock absorbing portion and a protrusion of an inner wall fitted into a mounting groove provided on the upper end outer periphery of the urethane bump, and a damper rod at the center with a compression tightening margin. It is composed of three parts: a rubber mount having a mounting hole, and a bellows-shaped dust boot that has an inward flange at the upper end surface that fits into the dust boot groove provided on the outer periphery of the urethane bump,
In each of the constituent parts, at least two kinds of parts having different sizes and having a common module can be used in combination.

A groove for the dust boot is provided at the uppermost position of the bellows of the urethane bump, and different identification punch marks are provided on the outer peripheral wall of the urethane bump and the dust boot at regular intervals according to a predetermined length. It is recommended to line up along the line.

With the above-mentioned structure, the urethane bumps of the bellows-shaped urethane shock absorber selected according to the shock absorber of the vehicle can efficiently absorb the shock of the vehicle. In addition, the rubber mount selected according to the hole in the state where the outer diameter of the damper rod of the vehicle includes the compression tightening margin is hard rubber, and it acts to always attach to the damper rod with a constant compression force,
Should the urethane bumps be damaged by a strong impact, protect the vehicle shock absorber from damage.

By cutting the urethane bumps and the dust boots in accordance with various vehicle shock symptoms and vehicle structural conditions, an optimum cushioning action and an optimum dustproof action can be obtained.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway sectional view of the present invention, FIG. 2 is a quarter sectional view of a urethane bump, and FIG. 3 is a quarter sectional view of a dust boot. In FIG. 1, reference numeral 1 is a urethane bump, 2 is a rubber mount, and 3 is a dust boot. As shown in FIG. 1, according to the present invention, a urethane bump 1, a rubber mount 2 made of rubber, and a bellows-shaped dust boot 3 are assembled and mounted on a vehicle. A cylindrical bump rubber that is attached to a damper rod 4 shown by an imaginary line and is used for abutting the damper body. The urethane bump 1 is a bellows-shaped urethane shock absorber, and an outer periphery of an upper end of the urethane bump 1. With the protrusion 21 of the inner wall fitted into the mounting groove 11 provided at the center, a hole 22 is attached at the center to the damper rod 4 by the compression force of rubber.
With a rubber mount 2 and a collar 3 to be fitted into a dust boot groove 12 provided on the outer periphery of the urethane bump 1.
It is composed of three parts of the dust boot 3 consisting of a cylindrical bellows 32 having 1 on the upper end surface, and each of the above-mentioned parts is used by combining several parts of different sizes having a common module. It is a bump rubber that can be.

In the urethane bump 1 shown in FIG. 2, four types having the same overall length but different inner and outer diameters are set so that they can be adapted to various vehicle types, and each is gradually thinned in the tip direction. An identification punch mark 13 corresponding to each step is provided as a bellows shape. This shows the cutting position so that the optimum adjustment can be made according to the decreasing width of the vehicle height of each vehicle type. According to the present embodiment, it is possible to cut four points from 75 mm to 37.5 mm on the urethane bump 1 body in five steps.

In the rubber mount 2 made of rubber, 24 types having the same overall height and different inner and outer diameters of the hole 22 for the damper rod 4 are set so that they can be adapted to various vehicle types. ing. Specifically, the outer diameter of the damper rod 4 can be selected from 12 mm to 25 mm. Therefore, when the urethane bump 1 is attached to the shock absorber, the fixing tightening margin for the damper rod 4 is substantially constant, and thus the same fixing force can be obtained.

In the dust boot 3 shown in FIG. 3, two types of external appearances and two types of internal diameters are provided so that the dust boot 3 can be adapted to various vehicle types, and the bellows 32 is stepped at a constant interval in the lower tip direction. Therefore, an identification punch mark 33 corresponding to each stage is provided. Thus, the cutting position is shown so that the length can be adjusted to the optimum length according to the height of the shock absorber of each vehicle type. Specifically, dust boots 3
It is possible to cut from 270 mm to 90 mm in 6 steps in 7 steps in the main body.

When using this, the user selects it based on the combination of the optimum parts prepared by the manufacturer and the display of the optimum cutting point according to his / her vehicle type, and the processing is performed according to the display. , The assembled one should be attached.

FIG. 4 is a perspective view showing an assembling procedure of the product of the present invention. First, the respective parts are selected and assembled in advance so as to be the optimum one according to the vehicle type to be mounted, and cut at the optimum position. And prepare it for installation. Next, disassemble the straddle and absorber based on the vehicle spring attachment / detachment and remove the genuine bump rubber. When the dust boot 3 is present, as shown in FIG. 4A, the urethane bump 1 is inserted from the upper portion of the dust boot 3 and the urethane boot 1 is compressed with both hands, and the urethane bump 1 is moved in the direction of the arrow. And push it into the groove 12 for the dust boot securely. In addition, when detaching, the urethane bump 1 is pushed further and removed from the inside. Then, Fig. 4
As shown in (b), the rubber mount 2 is securely fitted into the mounting groove 11 of the urethane bump 1. When removing it, remove it in the opposite direction of the arrow.

Here, a concrete example in which the product of the present invention is mounted and an experimental result will be described. For example, in vehicle A, the height of the front bump is 68mm, which is a genuine bump rubber.
Urethane bump height for boots and for rear 101mm
The bump rubber of the present invention, which is attached separately to the dust boot, is for the front and the urethane bump 1 has an outer diameter of 4
Adjust the bump height from 75 mm to 50 mm by cutting the object with 8 mm and inner diameter of 17 mm at the third step, that is, the position of punch mark 13, and the rubber mount 2 is the damper with the outer diameter of 48 mm and the inner diameter of 12 mm. The dust boot 3 is selected according to the rod, and the outer diameter of the bellows 32 is 65 mm, and the upper end of the urethane bump 1 at which the flange 31 for attaching the dust boot groove 12 has an inner diameter of 40 mm. The thing which cut | disconnected in 2 position of 33 and which adjusted the length of the dust boot from 270 mm to 120 mm is used. The urethane bump 1 for the rear has an outer diameter of 38 mm.
The bump height is set to 75 mm without cutting anything with an inner diameter of 17 mm, and the rubber mount 2 is selected with an outer diameter of 38 mm and an inner diameter of 12 mm according to the damper rod.
Use genuine dust boots.

As a result of a running test of the vehicle with the above-mentioned equipment mounted, the following good results were obtained. Compared to the genuine product, it has a cushioning stroke, which gives a comfortable ride as if the shock absorber had been replaced. In particular, the running stability of the rear and the so-called fit are improved. In addition, the feeling of push-up and push-up that is peculiar to genuine rubber at the front has completely disappeared.

[0016]

As described above, according to the present invention, since several kinds of component parts having the same module are provided as independent individual products, it is possible to select and combine the necessary products. This makes it possible to easily obtain the optimum bump rubber for various vehicle types. Therefore, it is possible to make a low-down vehicle that is comfortable to ride. Also,
Since it can correspond to each car model only by the inner diameter of the mount rubber,
It can be mass-produced and can be supplied at low cost. Further, since the constituent parts can be easily assembled and separated, when one constituent part is damaged, only the damaged part needs to be replaced, which is economical.

According to the second aspect of the present invention, since the groove for the dust boot is provided at the uppermost position of the bellows of the urethane bump, the range of dimensions by cutting is widened, so that the number of applicable vehicles is increased and the urethane is applied. By providing identification punch marks along the axis at regular intervals on the outer peripheral wall of the bumps and dust boots according to a predetermined length, the work to make the most suitable product for each vehicle type can be performed accurately and efficiently. You can do well.

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view of the present invention.

FIG. 2 is a quarter sectional view of a urethane bump.

FIG. 3 is a quarter sectional view of the dust boot.

FIG. 4 is a perspective view showing an assembling procedure of the product of the present invention.

[Explanation of symbols]

1 Urethane bump 11 mounting groove 12 Dust boot groove 13 Punch mark 2 rubber mount 21 Protrusion 22 holes 3 dust boots 31 Tsuba 32 bellows 33 Punch mark 4 damper rod

Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F16F 9/54 F16F 9/32 E

Claims (2)

[Claims] 1. A cylindrical bump rubber attached to a damper rod for contacting a damper body, comprising:
Urethane bumps with a bellows-shaped urethane shock absorber (1)
And a hole (2) that is attached to the damper rod at the center with a compression interference along with the protrusion (21) on the inner wall that fits into the mounting groove (11) provided on the outer periphery of the upper end of the urethane bump (1).
A rubber mount (2) having a groove (2), and a groove (1) for a dust boot provided on the outer periphery of the urethane bump (1).
2) It is composed of three parts, a bellows-shaped dust boot (3) having a flange (31) to be fitted into the upper end surface, and at least two different sizes in which each module has a common module. Bump rubber that can be used by combining various parts. 2. The dust boot groove (12) is provided at the uppermost position of the bellows of the urethane bump (1), and the urethane bump (1) and the dust boot (3) have a predetermined length on the outer peripheral wall thereof. The bump rubber according to claim 1, wherein the identification punch marks (13, 33) are provided at regular intervals.