JP2700665B2 - Automotive suspension equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension device for a motor vehicle, and more particularly to a strut for connecting a lower arm to a vehicle body and transmitting vibrations from wheels connected to the lower arm to the vehicle body. The present invention relates to an automobile suspension device that is prevented by struts.

[Related Art] Some automobiles adopt an independent suspension type in which left and right wheels are independently suspended.

In this independent suspension type, there are various types such as swing axle type, wishbone type, strut type, etc.
In particular, the strut type uses the shock absorber consisting of the inner and outer cylinder members as a part of the suspension link, connects the lower end to the lower arm and connects the upper end to the vehicle body, and the vibration from the wheels is transmitted to the vehicle body. Is prevented by the shock absorber.

As a suspension system for this car,
There is one disclosed in Japanese Patent Application No. -48443. The vehicle suspension apparatus disclosed in this publication includes a suspension lower arm formed by superimposing first and second arm members at a ball joint mounting portion, and lowers an upper wall portion of the first arm member downward. A flat extension is joined to the lower surface of the second arm member to form a closed cross-sectional structure, and appropriate strength can be given in consideration of the load sharing of each part of the suspension lower arm, and the weight is reduced. I have.

[Problems to be Solved by the Invention] By the way, in a conventional vehicle suspension device, a second arm member extending forward from a wheel attachment site is opposite to a first arm member extending rearward from a wheel attachment site of a lower arm. At least one of the mounting ends is composed of a pin, a bush, and a bracket.

When the lower arm attached to the vehicle body receives a large external force from the front of the vehicle body due to a collision, the mounting end of the first arm member is fixed to the vehicle body by a bush. The bush of the member does not structurally support a load due to a large external force.

For this reason, when an external force due to a collision is applied from the front direction or the rear direction of the vehicle body, the vehicle body is greatly deformed, and the bush is not supported by the load of the first arm member in the rotation axis direction. However, there is an inconvenience that the device comes off the bracket.

Further, when considering the energy absorption state at the time of collision, it is clear that the lower arm is not deformed at all as compared with the deformation of the vehicle body, and as a result, the lower arm does not absorb energy at the time of collision at all. However, there is a disadvantage that the energy at the time of the collision is absorbed only by the vehicle body and the vehicle body is largely deformed.

[Object of the Invention] Accordingly, an object of the present invention is to provide a first arm member extending forward from a wheel mounting portion and a first arm member extending inward from a wheel mounting portion to a lower arm of a vehicle suspension device in order to eliminate the above-mentioned disadvantages. A first part formed integrally with a two-arm member and attached to the vehicle body via a bracket.
A projection is provided at the mounting end of the arm member, and is protruded in one direction in the width direction of the first arm member and is lower than the upper surface height position of the first arm member. The deformation of the projection with a stepped cross section absorbs the energy at the time of the collision and reduces the deformation of the vehicle body at the time of the collision, thereby improving the rigidity of the vehicle body and improving the attachment of the strut lower end. And a vehicle suspension device that can be used.

Means for Solving the Problems In order to achieve this object, the present invention relates to a suspension apparatus for a motor vehicle having a lower arm connected to a vehicle body by a strut, wherein the first arm extends forward from a mounting portion of a wheel. The energy at the time of collision is deformed by a mounting end of the first arm member, which is integrally formed by an arm member and a second arm member extending inward from the mounting portion of the wheel to the inside of the vehicle body and mounted on the vehicle body side via a bracket. In order to absorb and reduce deformation of the vehicle body, the first arm member protrudes in one direction in the width direction and is lower than the upper surface height position of the first arm member. It is characterized in that a projection having a cross section having a step is provided.

[Operation] According to the invention described above, when an external force is applied to the vehicle body from the front or the rear by a collision, the vehicle protrudes in one direction in the width direction of the first arm member and is positioned at the upper surface height of the first arm member. By absorbing the energy at the time of impact by the deformation of the projection with a cross-sectional shape that has a step between the two upper surface heights and lower the height at the upper surface, the deformation of the vehicle at the time of collision is reduced, and the rigidity of the vehicle is improved. In addition, the lower end of the strut can be easily attached.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

1 to 4 show an embodiment of the present invention. 1 and 3, reference numeral 2 denotes an automobile body, 4 denotes wheels, 6 denotes a lower arm, and 8 denotes a stabilizer. The vehicle body 2 and the lower arm 6 are connected by a strut 10.

The strut 10 includes an outer cylinder member 14 and a piston rod.
16 and has.

The upper end 10a of the strut 10 is attached to the vehicle body 2 by a piston rod 16, and a strut mount 12 is provided between the piston rod 16 and the vehicle body 2.

The lower end 10b of the strut 10 has a knuckle 2
It is mounted on a bolt 0 with a tightening bolt 22.

The lower arm 6 is integrally formed of a first arm member 24 extending forward from a mounting portion of the wheel 4 and a second arm member 26 extending inward of the vehicle body from the mounting portion of the wheel 4. Is composed.

Then, a first pin 28 is provided on the first arm member 24,
The first bush 30 is externally fitted to the first pin 28, and the first bush 30 is configured to be attached to the vehicle body 2 by a first bracket 32 holding the first bush 30.

In the second arm member 26, a second pin 34
Thus, the second bush 36 is attached to the vehicle body 2 side.

At this time, in order to absorb the energy at the time of collision by deformation and reduce the deformation of the vehicle body 2, the mounting end 24a of the first arm member 24 to the vehicle body 2 side reduces the deformation of the vehicle body 2 in the width direction. A protruding portion 38 which protrudes in one direction and has a lower surface height position relative to the upper surface height position of the first arm member 24 and has a step 38a between both upper surface height positions is provided.

More specifically, when the projection 38 is formed on the mounting end 24a of the first arm member 24, the projection 38 extends in one direction in the width direction of the first arm member 24, that is, in the left direction in FIGS. In order to protrude and to lower the upper surface height position of the projection 38 with respect to the upper surface height position of the first arm member 24 in FIG. 2, for example, it has a cross-sectional shape having a step 38a between both upper surface height positions. To form.

Reference numeral 40 denotes a first support member on the vehicle body side that supports the strut mount 12, 42 denotes a cylindrical second support member mounted on the outer periphery of the piston rod 16, and 44 denotes a toe control rod.

 Next, the operation will be described.

For example, when an external force F is applied to the vehicle body 2 from behind by a collision, the projection 38 of the first arm member 24 is deformed to absorb energy at the time of the collision, and the mounting end 24 of the first arm member 24 is absorbed.
The deformation of the vehicle body 2 at the time of a collision can be reduced by the projection 38 having a large cross-sectional shape formed on the a, the rigidity of the vehicle body 2 can be improved without deforming the first bracket 32, and the strut 10 The attachment of the lower end 10b is improved.

Further, when the projection 38 is formed on the first arm member 24, the configuration of the lower arm 6 does not become complicated, the cost can be kept low, and it is economically advantageous.

[Effects of the Invention] As described in detail above, according to the present invention, the first arm member extending the lower arm of the vehicle suspension device forward from the mounting portion of the wheel and the second arm member extending inward of the vehicle body from the mounting portion of the wheel. And formed integrally with
The mounting end of the first arm member attached to the vehicle body via the bracket projects in one direction in the width direction of the first arm member to absorb the energy at the time of collision by deformation and reduce the deformation of the vehicle body. The upper surface is lower than the upper surface of the one arm member, and a projection having a sectional shape having a step between both upper surface positions is provided, so that when an external force is applied to the vehicle body from the front or the rear by a collision, By absorbing the energy at the time of the collision by the deformation of the projection formed on the first arm member, the deformation of the vehicle body at the time of the collision can be reduced, the rigidity of the vehicle body can be improved, and the attachment of the lower end portion of the strut can be improved. It can be improved. Further, when the projection is formed on the first arm member, the configuration of the lower arm does not become complicated, and the cost can be kept low, which is economically advantageous.

[Brief description of the drawings]

1 to 4 show an embodiment of the present invention. FIG. 1 is a schematic plan view of an automobile suspension device, and FIG.
FIG. 3 is a schematic front view of an automobile suspension device, taken along line II-II, FIG.
It is an explanatory view of an external force acting on a second arm member. In the figure, 2 is a vehicle body, 4 is a wheel, 6 is a lower arm, 8 is a stabilizer, 10 is a strut, 10a is an upper end, 1
0b is a lower end, 14 is an outer cylinder member, 16 is a piston rod, 12 is a strut mount, 20 is a knuckle, 22 is a tightening bolt, 24
Is a first arm member, 24a is a mounting end, 26 is a second arm member, 28 is a first pin, 30 is a first bush, 32 is a first bracket, 34 is a second pin, 36 is a second bush, 38 Is the protrusion,
40 is a first support member on the vehicle body side, 42 is a cylindrical second support member, 44
Is a toe control rod.

Claims (1)

(57) [Claims] An automobile suspension device having a lower arm connected to a vehicle body by struts,
A first arm extending forward from a mounting portion of the wheel;
A second extending inward from the vehicle body from the mounting portion of the arm member and the wheel
The first arm member is formed integrally with an arm member, and is attached to the vehicle body via a bracket. The first arm member has a mounting end which absorbs energy at the time of collision by deformation to reduce deformation of the vehicle body. A projection having a cross-sectional shape projecting in one direction in the width direction of the arm member and having a lower upper surface height position than the upper surface height position of the first arm member and having a step between both upper surface height positions is provided. Suspension device for automobiles.