JPH0418942Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to a subframe mounting structure, and in particular, to a suspension arm that supports a side member, cross member, or other member provided on an automobile body. The present invention relates to a structure for attaching a differential member and other subframes that support a differential carrier.

(Prior Art) For example, in order to attach the suspension member 12 to the side member 10 of a vehicle body, as shown in FIG. On the other hand, place the suspension member 12 against the side member 10 from below, pass the bolt 16 that passes through the side member 10 and the collar 14 through the suspension member 12, and insert the nut 18 onto the bolt 16. The suspension member 12 is attached to the side member 10 by screwing.

(Problems to be Solved by the Invention) According to the mounting structure, the collar 14 prevents the side member 10 from deforming. On the other hand, since there is a gap of 20 between the collar 14 and the bolt 16, when a force is input from the suspension member 12 to the force application point F, the bolt 16 can move in parallel within the collar 14 within a range of 20. This may adversely affect the steering stability of the vehicle.

Furthermore, in a state where movement occurs, the rigidity of the point of application of force is reduced, so there is a risk that the sound transmitted through the engine will resonate.

An object of the present invention is to provide a mounting structure that can increase the rigidity of the joint between a member on the vehicle body side and a subframe.

(Means for Solving the Problems) The present invention is a structure for attaching a subframe to a hollow member of a vehicle body, and includes a reinforcing member disposed across the hollow portion of the member. This reinforcing element is fixed to each of the two pieces of the member which are spaced apart in the direction of its extension and which define the hollow space.
The reinforcing member has a screw hole on the side where the subframe is to be attached, and the subframe is attached to the member by a bolt that passes through the subframe and is screwed into the screw hole.

(Operations and Effects) Since the reinforcing member disposed across the hollow portion of the member is fixed to the two pieces of the member located in the direction in which it extends, deformation of the member can be prevented. In addition, since the subframe is attached to the member by screwing bolts into the threaded holes in the reinforcing member, there is no gap between the bolts and the threaded holes in the reinforcing member, and the bolts do not move in parallel. Therefore, it is possible to prevent the steering stability from being impaired.
Furthermore, since the rigidity of the force application point is increased, there is no risk of resonance with engine transmitted sound, etc., and generation of cabin noise can be suppressed.

Unlike conventional through bolts, bolts do not need to pass through the member vertically, so they can be used, for example, in places where the mounting part for joining the upper end of a shock absorber protrudes above the member. Even if there is, it is possible to attach a subframe. As a result, the degree of freedom in selecting the mounting position of the subframe increases.

The bolt may be shorter than a conventional through bolt.

(Example) As shown in FIGS. 1 and 2, the attachment structure 30 is a structure for attaching a subframe 34 to a hollow member 32 of a vehicle body, and includes a reinforcing member 36.

In the illustrated example, the member 32 is the above-mentioned side member, and includes a first portion 33a formed of a plate material and having a U-shaped cross section, a second portion 33b welded to the flange of the first portion 33a, and a plate material. The cross section is formed into a U-shape, and consists of a reinforcing third portion 33c fixed inside the first portion 33a, and is formed in a hollow shape as a whole. member 32
When it is a side member, it is arranged on both sides in the width direction of the vehicle body and extends in the longitudinal direction of the vehicle body, but when it is a cross member, it extends in the width direction of the vehicle body.

In the illustrated example, the subframe 34 is the aforementioned suspension member to which a trailing arm, a pair of parallel links, a single arm, or other suspension arm is pivotally attached. In addition, the subframe 34 may be a differential member that supports a differential carrier. For example, by attaching the suspension arm to the vehicle body via the subframe 34, the ease of assembling the suspension arm and the accuracy of assembly are improved.

The reinforcing member 36 has a screw hole 37 on the side where the subframe 34 is to be attached. In the illustrated example,
The reinforcing member 36 is formed of a solid rod, and a screw 37 is cut into a hole opened from the lower end surface. If the reinforcing member 36 is formed of a solid rod as in this example, the rigidity can be further increased.

The reinforcing member 36 is disposed inside the member 32 with its screw 37 aligned with a hole 38 made in a portion of the member 32 to be attached to the subframe 34, and is attached to the third portion 33 of the member 32 at the upper and lower end surfaces.
c, welded to two pieces spaced apart in the direction of extension of the reinforcing member.

Subframe 34 is applied to the underside of member 32. Then, bolt 40 is attached to subframe 3.
4 through the hole 35 and screwed into the screw 37 of the reinforcing member 36. The spacers 42 placed on the subframe 34 are tightened at the upper and lower parts of the subframe, and the installation of the subframe 34 is completed.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a mounting structure according to the present invention, FIG. 2 is a perspective view showing a subframe attached, and FIG. 3 is a cross-sectional view of a conventional mounting structure. 30...Mounting structure, 32...Member, 34...
...Subframe, 36...Reinforcement member, 37...Screw, 40...Bolt.

Claims (1)

[Scope of utility model registration request] A structure for attaching a subframe to a hollow member of a vehicle body, the structure including a reinforcing member disposed across the hollow part of the member, the reinforcing member being spaced apart in the direction in which it extends. the reinforcing member has a threaded hole on the side to which the subframe is to be attached; A subframe mounting structure is attached to the member by a bolt that passes through and is screwed into the screw hole.