JPS5844008Y2 - Mounting structure for reinforcing strut bars for vehicle independent suspension systems - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an attachment structure for reinforcing strut bars provided in a vehicle independent suspension system to a vehicle body.

One type of independent suspension system for vehicles is a strut type suspension system, and this suspension system is generally provided with a strut bar for reinforcing the axle mounting portion.

One end of this reinforcing strut bar is connected to a swing arm for supporting an axle, and the other end is connected to the vehicle body.

In order to attach this reinforcing strut bar to the car body, an opening is formed in the car body to receive the end of the strut bar, and rubber is placed between the car body part on both sides of the car body part where the opening is formed. A pair of cylindrical elastic members are arranged.

The end portion of the strut bar is disposed to penetrate through the vehicle body portion and a pair of elastic members, and the elastic member is tightened with a certain tightness so as to sandwich the vehicle body portion by a screw member screwed into the strut bar. ing.

The strut bar reinforces the axle mounting portion by having the swinging arm bear a portion of the acting force in the longitudinal direction of the vehicle, and the pair of elastic members disposed at the mounting portion to the vehicle body portion strengthen the strut bar. It absorbs the vibrations that are transmitted to the vehicle body through the strut bar, and also relieves the impact force acting in the axial direction of the strut bar by compressing and deforming it.

The elastic member is not only subjected to the above-described compressive deformation, but also the strut bar is subjected to prying force and torsional force when the swing arm swings vertically due to the vehicle traveling on an uneven road surface, etc. Subject to prying and torsional deformation.

Even if the elastic member undergoes the aforementioned prying deformation and torsional deformation in a compressed state, if the end face of the elastic member and the vehicle body portion that abuts the end face are in a dry state, the elastic member and the vehicle body portion There are no stake slips between the two.

However, when rainwater or the like enters between the elastic member and the vehicle body part, the coefficient of friction between the two decreases, so the elastic member causes stake slip with the vehicle body part in order to eliminate the torsional strain. This has the drawback of producing abnormal noise or vibration.

SUMMARY OF THE INVENTION In view of the above-mentioned drawbacks, it is an object of the present invention to provide a mounting structure for a strut par that does not generate abnormal noise or vibration.

The present invention provides for a pair of elastic members used at the attachment portion of a reinforcing strut bar of a vehicle independent suspension system to the vehicle body to
It is characterized by using a rubber material containing heavy paraffin.

According to the present invention, since the elastic member made of the rubber material containing paraffin always exhibits a low coefficient of friction against the vehicle body, even if prying force and twisting force are applied to the elastic member in its compressed state, Each time the elastic member slips with the vehicle body portion, it is possible to prevent the occurrence of abnormal noise and vibration due to the conventional heavy stake slip of the elastic member.

The features of the invention will become clearer from the following description of the illustrated embodiment.

In FIG. 1, an independent suspension system for a vehicle incorporating a strut bar 10 according to the present invention is generally designated by the reference numeral 12.

In the illustrated example, the suspension system 10 includes a shock absorber 14 consisting of a piston and a cylinder, and a coil spring 16 that surrounds the shock absorber and is coaxially disposed therewith. It is.

The end of the piston rod 18 of the shock absorber 14 is elastically supported by the vehicle body 22 via a mounting portion 20, and the end of the cylinder 24 of the shock absorber 14 is supported by a rocker, as is well known in the art. It is swingably supported on other parts of the vehicle body via a movable arm 26.

The piston rod 18 and the cylinder 24 are provided with an upper spring seat 2 that receives the end of the coil spring 16.
8 and a lower spring seat 30 are each fixed, and a wheel 320 and an axle 34 are supported on the cylinder 24.

The wheel 320 axle 34 is suitably elastically supported by the vehicle body by a shock absorber 14 supporting the axle and a coil spring 16, and the force acting in the longitudinal direction of the vehicle on the axle 34 as the vehicle travels is mainly caused by the swing arm 26. Uke is stopped by this.

The strut par 10 is installed between the swing arm 26 and the vehicle body in order to prevent a portion of the longitudinal force acting on the swing arm 26 from being applied as an axial force and to reinforce the axle mounting portion. It is provided.

The strut par 10 is fixed at one end to a swing arm 26, and at the other end to a bracket 38 fixed to the vehicle body, a pair of cylindrical elastic members 36 (36a, 36b) as shown in FIG. ).

In the example shown in FIG. 2, the bracket 38, which is a part of the vehicle body, is made up of a pair of metal plates 38a and 38b that are joined to each other, and has an opening 40 in which the other end of the strut par 10 is received with play. .

Further, an annular seat surface 42 surrounding an opening 40 is formed on both sides of the bracket 38.

The cylindrical elastic member 36 is made of a rubber material containing 2 to 5 weight percent paraffin.

The paraffin in the rubber material prevents the rubber from deteriorating due to ozone in the air, and also lowers the coefficient of friction against metal materials, making it easier for the rubber material to slide against them.

In order to improve this slippage, the paraffin content can be set to a value exceeding 5 weight φ, but on the other hand, this reduces the strength and durability of the rubber. It is desirable to do so.

The elastic members 36 are arranged on both sides of the bracket 38 so that their holes coincide with the openings 40, and one end of each is arranged in contact with the seat surface 42.

An annular extension 44 extending to the opening 40 is formed at one end of one elastic member 36a, and the other elastic member 3
An annular groove 46 is formed at one end of 6b in correspondence with the elongated portion 44.

Further, an annular groove 48 is formed on the outer periphery of both elastic members 36.

A washer 50 (50a) is formed at the other end of each elastic member 36 with an opening that matches the hole of the elastic member.

50b) are arranged.

A male thread groove 10a is formed at the other end of the strut par 10, and this end is disposed to pass through the washer 50, the elastic member 36, and the opening and hole of the bracket 33, which is a part of the vehicle body.

A pair of screw members 52 (52a, 52b) that are screwed into the male thread groove 10a are provided at the end of the strut par 10, and spring washers 54 (54a, 52b) are provided at the ends of the strut par 10.
4b), the bracket 38 is inserted between the pair of elastic members 36 by tightening both screw members 52.

The tightening margin of both threaded members 52 is defined by a conventional sleeve 56 fitted to the other end of the strut bar 10 between both washers 50, and each elastic member 36 is inserted into its groove 48.
is compressed and tightened to the extent that it disappears,
Thereby, the other end of the strut bar 10 is elastically coupled to the vehicle body portion 38 via the elastic member 36.

One screw member 52b may be a flange integrally formed with the strut par 10.

The elastic member 36 absorbs vibrations transmitted to the strut par 10, and also relieves the impact force acting in the axial direction of the strut par by compressive deformation between its both ends, thereby preventing this impact from being transmitted to the vehicle body. .

The elastic member 36 also prevents the strut par 10 from swinging when the swinging arm 26 swings due to the vehicle traveling on an uneven road surface.
Since prying and torsional forces act on the material, it undergoes prying and torsional deformation.

However, according to the present invention, the elastic member 36 has a low coefficient of friction with respect to the bracket 38, which is a part of the vehicle body, regardless of whether rainwater or the like has entered.
6 is compressed between the bracket 38 and the washer 50 and is further subjected to prying deformation and torsional deformation, the elastic member 36 should smoothly slide between it and the seat surface of the bracket 38 each time. , a large stake slip as in the conventional case does not occur in the elastic member 36.

Therefore, vibrations and noise due to this stake slip are not generated, and thus the strut par 10 can be suitably elastically supported on the vehicle body portion.

[Brief explanation of the drawing]

FIG. 1 is a perspective view schematically showing an independent suspension system according to the present invention, and FIG. 2 is a longitudinal sectional view showing a structure for attaching the reinforcing strut bar shown in FIG. 1 to a vehicle body part. 10; Strut par 26; Swing arm, 36 (36
a, 36b): Elastic member, 38; Vehicle body part, 40;
Opening in vehicle body part, 52 (52a, 52b); screw member.

Claims (1)

[Scope of utility model registration request] A structure for attaching a reinforcing strut bar to a vehicle body, which is provided between a swing arm of a vehicle independent suspension system and a vehicle body, the plate-shaped vehicle body portion having an opening for receiving an end of the strut bar; a pair of cylindrical elastic members arranged on both sides of the vehicle body part in alignment with the opening and in contact with the end face of the vehicle body part; and a pair of cylindrical elastic members arranged to penetrate through the cylindrical elastic member and the vehicle body part. and a screw member screwed onto the strut bar to sandwich the vehicle body portion between the pair of elastic members, and the elastic member is made of a rubber material containing paraffin having a weight of 2 to 5 φ. A mounting structure for reinforcing strut bars for vehicle independent suspension systems.