JPH0415521Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a support bracket for a shock absorber damper mounting pin in a training twist axle suspension.

<Prior art> A training twist axle type suspension used as a rear suspension of a front-wheel drive vehicle has a spindle 1 protruding from it for attaching a rear wheel (not shown), as shown in FIG. 3, which schematically shows its structure. The axle beam 2 includes an axle beam 2, a buffer spring 3 and a damper 4 installed between the axle beam 2 and the vehicle body (not shown), and both front and rear ends connected to the axle beam 2 and the vehicle body.
The training arm 5 has a training arm 5 that restricts the movement of the axle beam 2 in the longitudinal direction, and a lateral rod 6 whose left and right ends are connected to the axle beam 2 and the vehicle body (not shown) to restrict the movement of the axle beam 2 in the lateral direction. The attachment of the damper 4 constituting the absorber to the axle beam 2 is shown in FIG. 4 showing the external appearance of the attachment part and in FIG.
This is done as shown in the figure. That is, the support bracket 8 for the damper mounting pin 7 for mounting the damper 4 has a box shape with an open upper end, and the upper end of the support bracket 8 is inserted between the front and rear end surfaces of the axle beam 2, which has a horseshoe-shaped cross section. While welding both together, the mounting pin 7 of the damper 4 is passed through the pin mounting hole 10 provided in the part of the support bracket 8 that protrudes from the lower surface of the axle beam 2, and the periphery of the damper mounting pin 7 is attached to the bracket 8. Circumferential welding 11 is performed. And this damper mounting pin 7
The damper 4 is connected to the damper mounting pin 7 by inserting a mounting portion provided at the lower end of the damper 4 into the large diameter portion 12 of the damper 4 and screwing a nut (not shown) into the pin male threaded portion 13. .

<Problems to be solved by the invention> Conventional support bracket 8 for damper mounting pin 7
is box-shaped and has high rigidity, so spindle 1
Due to the twisting of the axle beam 2 due to the relative displacement of the axle beam 2, stress concentration occurs at the welded joint 9 between the axle beam 2 and the support bracket 8, resulting in a problem of low durability.

The present invention was developed in view of the above problems, and provides a training twist axle type suspension that improves durability by reducing stress concentration at the welded joint between the axle beam and the support bracket of the damper mounting pin. The purpose is to provide.

<Means for solving the problem> The training twist axle type suspension of the present invention has left and right training arms extending in the longitudinal direction of the vehicle, and these training arms extending in the width direction of the vehicle. In a training twist axle type suspension, the training twist axle type suspension has an axle beam having a horseshoe-shaped cross section connected at the rear end and open at the bottom, and a pair of left and right spindles provided at both left and right ends of the axle beam and supporting wheels respectively. Only the upper sides of a pair of pin support plates facing each other are welded to the center portions in the height direction of the front and rear surfaces of the axle beam ends, and the pin protrudes from the portion of the pin support plates that protrudes from the lower end surface of the axle beam. The present invention is characterized in that mounting holes for damper mounting pins of the shock absorber are formed in the support plate, and the damper mounting pins passing through these mounting holes are joined to the pin support plate.

<Function> The support bracket for the damper mounting pin is composed of a pair of pin support plates that face each other and are separated from each other, and the height of the front and rear surfaces of the axle beam end portion of the horseshoe-shaped cross section with only the upper sides of these pin support plates open at the bottom is adjusted. Because it is welded to the center in the width direction, the rigidity of this support bracket is lower than that of conventional box-shaped brackets.
Stress concentration at the joint between the axle beam and the support bracket is alleviated.

<Embodiment> As shown in FIG. 1 showing the main part of an embodiment of the present invention and FIG. 2 showing its appearance, the support bracket 14 of the damper mounting pin 7 is composed of a pair of pin support plates facing each other. The axle beams of the opposing pin support plates 15 and 16 are fillet welded to the heightwise center of the front and rear surfaces of both left and right ends of the axle beam 2, which has a horseshoe-shaped cross section with only the upper sides of the pins 15 and 16 open at the bottom. Damper pin mounting holes 19 and 20 for the damper mounting pin 7 are formed in the portion protruding from the lower surface of the damper mounting pin 2 . Then, the damper pin mounting hole 1
9 and 20, and insert the damper mounting pin 7 of the damper 4 through the outer circumference of the damper mounting pin 7 on the pin support plate 1.
5, 16 are circumferentially welded 21, 22, and the pin large diameter part 1
Insert the mounting part of the damper 4 into the pin male thread part 1.
3 with a nut (not shown) to fix the damper 4 to the damper mounting pin 7. In addition, pin support plate 1
5 and 16 may be obtained by pressing a single sheet integrally with the axle beam 2, and in this case, welding to the axle beam 2 can be omitted.

Therefore, only the upper sides of the pair of pin support plates 15 and 16 are welded to the center portions of the front and rear surfaces of the axle beam 2 in the height direction, respectively, to form the support bracket 14 for the damper mounting pin 7. , the rigidity of the support bracket 14 is lower than that of a conventional box-shaped bracket, and therefore stress concentration at the welded joint between the axle beam 2 and the support bracket 14 is alleviated;
Increases durability.

<Effects of the invention> According to the training twist axle type suspension of the invention, the height center of the front and rear surfaces of the axle beam end portion of the horseshoe-shaped cross section where only the upper sides of a pair of mutually opposing pin support plates are open at the bottom. Since the welding is performed at the welded joint between the axle beam and the support bracket of the damper mounting pin, stress concentration at the welded joint between the axle beam and the support bracket of the damper mounting pin is alleviated, making it possible to improve durability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the main parts of an embodiment of the present invention, FIG. 2 is a perspective view thereof, and FIG. 3 is a perspective view of a training twist axle suspension.
FIG. 4 is a perspective view corresponding to FIG. 2 showing the structure of a conventional example, and FIG. 5 is a sectional view thereof. Also, in the figures, 1 is the spindle, 2 is the axle beam, 3 is the buffer spring, 4 is the damper, 5 is the training arm, 6 is the lateral rod, 7 is the damper mounting pin, 14 is the support bracket, 15, 16
is a pin support plate, 17 and 18 are fillet welds, 19,
20 is a damper pin mounting hole, and 21 and 22 are circumferential welds.

Claims (1)

[Scope of utility model registration request] Left and right training arms extending in the longitudinal direction of the vehicle; an axle beam extending in the vehicle width direction to which the rear ends of these training arms are connected and having a horseshoe-shaped cross section with an open bottom; and both left and right ends of the axle beam. In a training twist axle type suspension having a pair of left and right spindles that are installed in Mounting holes for damper mounting pins of the shock absorber are formed in a portion of the pin support plate that is welded to the center part and protrudes from the lower end surface of the axle beam, and the damper mounting pins that pass through these mounting holes are attached to the pin support plate. Training twist axle type suspension characterized by being joined to.