JPS644923B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a wheel suspension system for an automobile, in which the reaction force of a torsion bar spring is distributed and received by a chassis frame and a cross member, thereby reducing the size of the cross member. It also allows for diversification of engine layouts, as well as flexibility in the arrangement of exhaust pipes, parking brake cables, etc.

Some automobiles have shock absorbers and torsion bar springs that absorb vibrations in the vertical direction of the wheels. This torsion bar spring is normally provided along a chassis frame that extends in the longitudinal direction of the vehicle body. The base end of an upper arm that supports the wheel at its tip is fixed to one end of this torsion bar spring, and an anchor arm is attached to the other end to prevent twisting of the torsion bar spring beyond a certain value. It is common that it is set to .

In conventional wheel suspension systems, the torsion bar spring is installed inside the chassis frame, and the anchor arm stopper bracket is also installed inside the chassis frame and integrally with the cross member. Since the reaction force of the torsion bar spring is received in one place, it is necessary to strengthen the structure of this part, which also imposes restrictions on the layout of the engine and transmission, and furthermore, the exhaust pipe There was also the drawback that flexibility could not be obtained in the arrangement of the parking brake cable, etc.

This invention eliminates these conventional drawbacks, and distributes the reaction force of the torsion bar spring between the outside of the chassis frame and the cross member, thereby increasing the freedom of layout of the engine and transmission, and the flexibility of the exhaust pipe and The purpose is to increase the degree of freedom in the arrangement of parking brake cables, etc.

Next, an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a chassis frame, which is provided along the longitudinal direction of a vehicle body (not shown). Although two chassis frames 1 are provided in parallel, only one of them is shown in this figure. A cross member support 2 is attached to the inside of this chassis frame 1, and supports one end of a cross member 3. The cross member 3 is provided inside the chassis frame 1 in a direction horizontally orthogonal to the chassis frame 1, and connects two parallel chassis frames 1 via the cross member support 2.

A torsion bar spring 4 is provided on the upper part of the chassis frame 1 along the chassis frame 1. 5 is a bearing that supports this torsion bar spring 4. A base end of an anchor arm 6, which will be described later, is attached to one end of the torsion bar spring 4, and base ends of two upper arms 7 of the front suspension are fixed to the other end.

The upper end of a bracket 10 that supports an axle 9 of a wheel 8 is pivotally attached to the tip of the upper arm 7 by a shaft 11. The lower end of the bracket 10 is the shaft 12
The base end of the lower arm 13 is pivotally connected to the lower side of the chassis frame 1 by a longitudinal axis (not shown). A shock absorber 14 is attached near the base end of the lower arm 13.

Next, the anchor arm 6 will be explained with reference to FIGS. 2 and 3. A torsion burst stopper 15 is attached between the end of the cross member 3 and the chassis frame 1. The base end of the anchor arm 6 is attached to the burst stopper 15.
Rotatably supported. A hole 16 with a hemispherical upper part is provided at the tip of the anchor arm 6, and the hemispherical head of the anchor bolt 17 is engaged with the hole 16. A stopper bracket 18 is attached to the outside of the chassis frame 1 on the same vertical plane as the vertical plane passing through the center of the cross member 3, and the lower end of the aforementioned anchor bolt 17 is inserted into the stopper bracket 18. , are fastened with a nut 20 via a buffer body 19. Since the stopper bracket 18 is thus attached to the outside of the chassis frame 1, it becomes a separate member from the cross member 3. Note that 21 in FIG. 2 is a mount for supporting the transmission.

In this device configured in this manner, when the wheel 8 vibrates in the vertical direction as shown by the arrow in FIG. And this vibration is caused by the shock absorber 1
4 and the torsion of the torsion bar spring 4. Now, if the wheel 8 is displaced up and down, that displacement is transmitted to the torsion bar spring 4 via the upper arm 7, which is twisted counterclockwise in FIG. 3 to move the anchor arm 6 in that direction. There is a force that tries to rotate it. Therefore, the reaction force is received by the stopper bracket 18 via the anchor bolt 17, and also by the cross member 3 via the torsion burst stopper 15, and is transmitted to the chassis frame 1.

Since this invention is configured as described above, it has the following effects.

(1) Since the reaction force of the torsion bar spring is distributed and received by the chassis frame and cross member, the cross member can be made smaller and lighter than conventional ones.

(2) Because the anchor bolts, shock absorbers, and stopper brackets that transmit the reaction force of the torsion bar springs to the chassis frame are attached to the outside of the chassis frame, the inside of the chassis frame is widened and the engine and The degree of freedom in mounting transmissions and the like is improved, and there are fewer restrictions on the placement of exhaust pipes and parking brake cables.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is an enlarged perspective view of the portion shown in FIG. 1, and FIG. 3 is a sectional view of FIG. 2 viewed from the direction. 1... Chassis frame, 3... Cross member, 4
...Torsion bar spring, 6...Anchor arm, 8...Wheel, 17...Anchor bolt, 18...Stopper bracket.

Claims (1)

[Claims] 1. In an automobile in which a torsion bar spring is provided along a chassis frame extending in the longitudinal direction of the vehicle body, and vibrations in the vertical direction of the wheels are absorbed by the torsion of the torsion bar spring, the chassis A torsion burst stopper is installed inside the frame between the end of the cross member in a direction perpendicular to the chassis frame horizontally and the chassis frame, and a torsion burst stopper is attached to the outside of the chassis frame in the same vertical plane as the cross member. A stopper bracket is attached to the torsion bar, the proximal end of an anchor arm attached to one end of the torsion bar is rotatably supported by the torsion bar stopper, and the tip of the anchor arm is attached to the stopper bracket via an anchor bolt. A wheel suspension system for an automobile, characterized in that the wheel suspension system is fastened.