JP3247590B2 - Mounting bracket for hydraulic shock absorber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting bracket for a hydraulic shock absorber applied to a vehicle suspension device or the like.

[0002]

2. Description of the Related Art In a strut type suspension device using a hydraulic shock absorber as a support for positioning a wheel, a piston rod of the hydraulic shock absorber is attached to a vehicle body via an insulator. A mounting bracket fixed to the lower end is connected to the knuckle spindle and the axle housing.

A conventional mounting bracket for a hydraulic shock absorber is, for example, as disclosed in Japanese Utility Model Laid-Open No. 1-120404, in which a plate member is bent in a substantially U-shape to form a curved portion extending in the axial direction and a curved portion extending in the axial direction. A linear portion is formed at the circumferential end of the portion, and the lower end of the hydraulic shock absorber is inserted inside the curved portion to be fixed to the lower end of the hydraulic shock absorber. In addition, a hollow in the longitudinal direction of the vehicle is provided in the body of the hydraulic shock absorber,
The mounting bracket is provided with an inward projection adapted to the recess, so that the mounting bracket is firmly fixed to the hydraulic shock absorber. The inward projection is formed at a position where the bracket moves from a U-shaped curved portion to a straight portion at a substantially central position in the axial direction of the mounting bracket.

[0004] The mounting bracket is arranged such that a straight portion connected to the U-shaped curved portion faces the left and right direction of the vehicle.
This straight part forms a mounting surface and is connected, for example, to a knuckle spindle.

[0005] When the piston rod of the hydraulic shock absorber is mounted on the vehicle body, and a mounting bracket fixed to the lower end of the hydraulic shock absorber is connected to the knuckle spindle, the hydraulic shock absorber functions as a suspension device. The mounting bracket supports a front-rear direction and a left-right force of the vehicle input from the piston rod side, with a mounting portion of the mounting bracket to the vehicle as a fixed end.

[0006]

However, in the above-mentioned prior art, the rigidity of the mounting bracket when the force in the longitudinal direction of the vehicle acts, especially the mounting portion of the hydraulic shock absorber and the mounting portion to the knuckle spindle. , That is, the rigidity at the transition from the U-shaped curved portion to the straight portion of the mounting bracket is not considered at all. In addition, with respect to the force in the direction of the outer ring of the vehicle, of the input in the lateral direction of the vehicle, the projection contributing to the support of this force is provided only at the substantially central portion in the axial direction of the mounting bracket. Therefore, there is a possibility that sufficient strength cannot be obtained.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional circumstances, and has as its object to provide a mounting bracket capable of supporting a vehicle with sufficient rigidity and strength against a longitudinal input and a lateral input. And

[0008]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a bending member having a curved portion extending in an axial direction and linear portions formed at both circumferential ends of the curved portion. In the mounting bracket of the hydraulic shock absorber in which the lower end portion of the hydraulic shock absorber is inserted and fixed inside, at a substantially axially central position of the mounting bracket at a portion where the curved portion transitions to the linear portion, outward. And a projection in contact with the lower end of the hydraulic shock absorber is provided at both axial positions of the mounting bracket across the projection.

In the mounting bracket of the present invention, the substantially rectangular plate member is bent into a substantially U-shape as a whole, and the lower end of the hydraulic shock absorber is inserted and fixed inside the bent portion. It is. An attachment surface and an attachment hole are formed in a straight portion connected to the curved portion bent in a U-shape, and the straight portion having this attachment surface sandwiches a member on the unsprung side, for example, a knuckle spindle attachment portion. As a result, the knuckle spindle is mounted on the knuckle spindle by bolts inserted into the mounting holes. In this case, the straight portion is disposed so as to face the left-right direction of the vehicle.

An outwardly protruding portion provided at a substantially central position in the axial direction of the mounting bracket at a portion transitioning from the curved portion to the straight portion is bulged from the inside to the outside of the U-shape, and is preferably. Press forming is performed before bending the plate member into a substantially U-shape.

Protrusions provided on both sides of the protrusion and in contact with the lower end of the hydraulic shock absorber increase the contact area of the mounting bracket with the body of the hydraulic shock absorber. The protrusion is press-formed in the same manner as the protrusion.

The hydraulic shock absorber provided with the mounting bracket has a piston rod mounted on the vehicle body side and a mounting bracket mounted on the unsprung side, and functions as a vehicle suspension device and controls vibration damping. In this case, the mounting bracket supports the vehicle in the front-rear direction and the left-right direction input from the piston rod side with the mounting portion of the mounting bracket to the vehicle as a fixed end.

Here, the force in the front-rear direction of the vehicle is:
By providing an outwardly projecting portion at a portion of the mounting bracket that transitions from the curved portion to the straight portion, the rigidity of the mounting bracket is increased, and the support strength is increased. Also, with respect to the lateral force of the vehicle, the projections provided on both axial sides of the mounting bracket with the protrusions interposed therebetween increase the contact area with the body of the hydraulic shock absorber on the outer ring side of the vehicle. In this case, the outer periphery of the hydraulic shock absorber is firmly supported, and the projections (support points) are provided on both sides of the mounting bracket in the axial direction with the projections interposed therebetween. As a result, the bending moment input from the piston rod is reduced, and the strength can be improved.

When the mounting bracket is fixed to the hydraulic shock absorber by welding at the lower end of the hydraulic shock absorber, the projection increases the contact area between the hydraulic shock absorber and the mounting bracket. Thus, welding can be performed over a range from the protrusion on one straight portion side to the protrusion on the other straight portion side via the curved portion, and a longer welding length can be secured, so that a strong fixing is possible. Becomes

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention applied to a mounting bracket of a hydraulic shock absorber applied to a strut type suspension device will be described in detail with reference to the drawings.

FIG. 1 is a plan view of a mounting bracket of a hydraulic shock absorber according to an embodiment of the present invention. In the drawing, reference numeral 1 denotes a hydraulic shock absorber, and 2 denotes a mounting bracket. The mounting bracket 2 is formed by bending a substantially rectangular plate member as a whole into a substantially U-shape, and has a curved portion 3 extending in the axial direction and the curved portion 3. A linear portion 4 is formed at the circumferential end of the portion 3, and the lower end 1a of the hydraulic shock absorber 1 is inserted and fixed inside the curved portion 3 (FIG. 2).
reference). The mounting bracket 2 is welded W to the lower end 1a of the hydraulic shock absorber 1 at the lower end in the axial direction.

Each of the linear portions 4 has a mounting surface 5 and a mounting hole 6 formed therein. Also, the two mounting surfaces 5
Is smaller than the inner diameter of the curved portion 3 (see FIG. 5).

An outwardly projecting portion 7 is formed at a substantially axially central position of the mounting bracket 2 at a portion where the curved portion 3 transitions to the straight portion 4. The protruding portion 7 bulges from the inside of the U-shaped mounting bracket 2 to the outside, extends in the tangential direction of the curved portion 3, and connects the curved portion 3 and the straight portion 4 (FIG. 3). reference).

On both sides of the projecting portion 7 in the axial direction of the mounting bracket 2, projections 8 and 9 that contact the lower end portion 1a of the hydraulic shock absorber 1 are provided. These projections 8,
Reference numeral 9 denotes a direction substantially opposite to the protrusion 7 and bulges from the outer periphery to the inner periphery of the U-shaped mounting bracket 2. They are arranged at intervals. In FIG. 1, the projection 8 located on the upper side in the axial direction of the mounting bracket 2 is larger than the projection 9 also located on the lower side, that is, the contact area of the hydraulic shock absorber 1 with the body is larger in the circumferential direction. Secure this projection 8
Are formed so as to reduce the interval K2.

The protruding portion 7 and the projections 8 and 9 are both seat surfaces 1 of mounting bolts (not shown) which are inserted into the mounting holes 6 of the mounting surface 5.
It is formed in a range that does not make contact with zero, and the area of the mounting surface 5 is sufficiently ensured.

Reference numeral 11 denotes a flange formed by bending both ends of the mounting bracket 2 in the axial direction, and 12 denotes a notch formed in a part of the curved portion 3.

In such a construction, the hydraulic shock absorber 1 has a piston rod (not shown) attached to the vehicle body side, and a mounting bracket 2 fixed to a lower end portion of the hydraulic shock absorber 1 has an unsprung side (not shown) below the spring. Connected to knuckle spindle. Specifically, the straight portion 4 of the mounting bracket 2 is arranged so as to face the left-right direction of the vehicle, and is inserted through the mounting hole 6 with the mounting portion of the knuckle spindle interposed between the mounting surfaces 5 formed on the straight portion 4. Are connected by mounting bolts not shown.

When the hydraulic shock absorber 1 functions as a suspension device, the mounting bracket 2 is mounted on the vehicle body with the mounting portion of the mounting bracket 2 on the unsprung portion (knuckle spindle) of the vehicle as a fixed end. It supports forces in the front-rear direction and left-right direction of the vehicle input from the piston rod side (not shown).

At this time, with respect to the longitudinal force of the vehicle, the rigidity of the mounting bracket 2 is reduced by the outwardly projecting portion 7 provided at the portion where the curved portion 3 of the mounting bracket 2 transitions to the straight portion 4. Is increased and the support strength is increased.

On the other hand, with respect to the force in the left-right direction of the vehicle, the projections 8 and 9 provided on both sides of the mounting bracket 2 in the axial direction with the projecting portion 7 interposed therebetween are used as the hydraulic shock absorber 1 on the outer ring side of the vehicle. This increases the contact area with the body, and firmly supports the outer periphery of the hydraulic shock absorber 1. In addition, this projection 8,
Since the protrusions 9 are provided on both sides of the mounting bracket 2 in the axial direction with the protrusion 7 interposed therebetween, one of the protrusions (upper protrusion in the axial direction) 8 comes closer to the piston rod (not shown).
Thereby, the bending moment input from the piston rod is reduced, and the strength can be improved.

A projection 9 on the lower side in the axial direction of the mounting bracket 2 extends the contact area with the body of the hydraulic shock absorber 1 at the lower end in the axial direction of the mounting bracket 2 in the circumferential direction. This allows the mounting bracket 2 to be connected to the hydraulic shock absorber 1
Since a longer welding length can be ensured when welding to the hydraulic shock absorber 1 at the lower end portion 1a, a firm fixation becomes possible.

Although the embodiment has been described with reference to the drawings, the specific configuration is not limited to this embodiment, and can be changed without departing from the gist of the invention.
For example, among the protrusions 8 and 9 formed on both sides in the axial direction of the mounting bracket 2 with the protrusion 7 interposed therebetween, the embodiment in which the upper protrusion 8 in the axial direction is formed larger than the lower protrusion 9 in the axial direction has been described. Alternatively, both may be formed in the same size.

[0028]

As described in detail above, according to the present invention, the input of the vehicle in the front-rear direction and the left-right direction is
A mounting bracket that can be supported with sufficient rigidity and strength is obtained.

[Brief description of the drawings]

FIG. 1 is a plan view of a mounting bracket of a hydraulic shock absorber according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a sectional view taken along line CC of FIG. 1;

FIG. 5 is a view in the direction of arrow D in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hydraulic shock absorber 1a Lower end part 2 Mounting bracket 3 Curved part 4 Linear part 7 Projection part 8,9 Projection

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-8-210421 (JP, A) JP-A-58-64504 (JP, U) JP-A-1-120404 (JP, U) JP-A 4-104 71836 (JP, U) Japanese Utility Model 63-99049 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) F16F 9/54 B60G 13/06

Claims (1)

(57) [Claims] 1. A plate member is bent in a substantially U-shape to form a curved portion extending in the axial direction and straight portions at both ends in the circumferential direction of the curved portion, and a hydraulic shock absorber is provided inside the curved portion. In a mounting bracket of a hydraulic shock absorber having a lower end inserted and fixed, an outwardly projecting portion is provided substantially at the center of the mounting bracket in the axial direction at a portion where the curved portion transitions to the linear portion, and A mounting bracket for a hydraulic shock absorber, wherein projections are provided at both axial sides of the mounting bracket with the portion interposed therebetween, the protrusions being in contact with the lower end of the hydraulic shock absorber.