JP2009234412A - Part mounting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a part mounting structure to eliminate influence of deformation due to thermal distortion of a mounting part in welding without cutting work and mounting of a separate part. <P>SOLUTION: This part mounting structure having a spindle supporting plate 18 to be mounted by welding on an end part of a trailing arm 14 is constituted by forming bent parts 34a, 34b to incline disc brake mounting parts 30a, 30b in the vicinity of the disc brake mounting parts 30a, 30b of the spindle supporting plate 18 and an outside position of a welding part and forming push-in parts 36a, 36b to regulate positions of mounting holes 32a, 32b by pressing disc brake side surfaces on disc brake side surfaces of the disc brake mounting parts 30a, 30b, and the push-in parts 36a, 36b make a push-in surface 38 have inclination of a prescribed angle θ2 so that the push-in surface 38 comes to be in parallel with a mounting surface 40 in adjustment by the push-in parts 36a, 36b after the welding. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a component mounting structure, and more particularly to a component mounting structure in which a press-formed product having a mounting portion with a mounting hole protruding sideways is attached to an end portion of a mounting component that is attached to a mounting target by welding.

  In general, a torsion beam suspension, for example, is known as a component mounting structure for mounting a press-molded product having a mounting portion with a mounting hole to the side by welding to an end of a mounting component that can be mounted on an object to be mounted. Yes.

  In this torsion beam suspension, a trailing arm extending in the front-rear direction of the vehicle body is connected to both ends of the torsion beam extending in the width direction of the vehicle body, and one end of the trailing arm is connected to the vehicle body side via the trailing arm support portion. The other end is connected to the wheel via a spindle support plate that supports the wheel spindle.

  The trailing arm and the spindle support plate are integrated by abutting the end of the trailing arm against the spindle support plate and welding the entire circumference of the trailing arm to the spindle support plate ( (See Patent Document 1 and FIG. 8).

The spindle support plate can be attached to the wheel by bolting a plurality of disc brake mounting portions protruding outward from the welded portion to the disc brake.
JP 2005-81905 A

  In such a torsion beam type suspension, since the disc brake mounting portion is attached to the disc brake by a bolt, the mounting hole position is required to be highly accurate.

  However, due to welding thermal distortion when welding the entire circumference of the trailing arm to the spindle support plate, the disc brake mounting part is deformed in a direction away from the mounting surface on the disc brake side, and the angle of the mounting hole is distorted. The position of the hole will be out of order.

  Therefore, measures are taken to ensure the dimensional accuracy of the required mounting holes in the vehicle by cutting, or to eliminate deformation due to welding by attaching another part, but the number of parts and the number of processes are increased. Will increase the cost.

  An object of the present invention is to provide a component mounting structure that can eliminate the influence of deformation due to thermal distortion of the mounting portion during welding without cutting or mounting another component, and can also reduce costs. It is in.

In order to achieve the above object, the component mounting structure of the present invention includes a mounting component to be mounted on the mounting target,
A component mounting structure having a mounting portion with a mounting hole protruding sideways and having a press-molded product that is attached to the end of the mounting component by welding,
A bent portion for inclining the attachment portion toward the attachment object is formed near the attachment portion of the press-formed product at the outer position of the weld portion, and the attachment object side surface is formed on the attachment object side surface of the attachment portion. A push-in portion for adjusting the position of the mounting hole by pressing is formed, and the push-in portion is inclined at a predetermined angle so that the push-in surface is parallel to the mounting surface during adjustment by the push-in portion after welding. It is characterized by having it.

  According to the present invention, the entire circumference of the attachment part is welded to the press-formed product by inclining the attachment portion toward the attachment object side by the bent portion formed at the outer position of the welded portion near the attachment portion of the press-formed product. Even if the mounting portion is deformed in a direction away from the mounting surface on the mounting object side due to welding thermal distortion, the mounting hole is inclined if the mounting portion is inclined toward the mounting object side in advance. Can be ensured with high accuracy after welding, and the position of the mounting hole can be determined by taking into account the displacement of the mounting hole caused by thermal distortion during welding by the push-in part formed on the side of the mounting target object of the mounting part. By adjusting, the position of the mounting hole can be ensured with high accuracy after welding.

  In addition, since the push-in part has a structure in which the push-in surface is inclined at a predetermined angle so that the push-in surface is parallel to the mounting surface during adjustment by the push-in part after welding, the surface with the mounting surface after welding The accuracy can be easily adjusted.

  Therefore, it is possible to eliminate the influence of deformation due to thermal distortion of the disc brake mounting portion during welding without cutting or attaching another part, and the cost can be reduced.

  In the present invention, the push-in portion can be formed by coining.

  By setting it as such a structure, it can process cheaply by the press work using coining within a progressive die.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 to 3 are views showing a torsion beam suspension using a component mounting structure according to an embodiment of the present invention.

  FIG. 1 is a schematic view of a torsion beam suspension. This torsion beam suspension 10 includes a torsion beam 12, a trailing arm 14 constituting a mounting part, a trailing arm support 16 and a spindle support constituting a press-formed product. Plate 18.

  The torsion beam 12 is disposed so as to extend in the width direction of the vehicle body, and absorbs the vertical movement of the wheel by the torsion return action of the torsion beam.

  The trailing arm 14 is in the form of a hollow pipe and is composed of a pair of left and right members that are connected to both ends of the torsion beam 12 and extend in the front-rear direction of the vehicle body, and is reinforced between the pair of trailing arms 14 and the torsion beam 12. A gusset 20 is provided.

  A spring seat 22 that supports the lower end of a suspension spring (not shown) is provided between the intermediate portion of the trailing arm 14 and the gusset 20.

  The trailing arm support 16 is attached to one end (front end) of the trailing arm 14, and the trailing arm 14 swings up and down on the vehicle body via a rubber bush joint (not shown) housed in the trailing arm support 16. It is designed to be movably connected.

  The spindle support plate 18 is attached to the other end (rear end) of the trailing arm 14.

  As shown in FIG. 2, the spindle support plate 18 is attached to the trailing arm 14 by abutting the rear end of the trailing arm 14 against the spindle support plate 18 so that the entire circumference of the trailing arm 14 is moved to the spindle support plate. By welding to 18 and forming the annular welded portion 24, sufficient strength is provided.

  The spindle support plate 18 supports a wheel spindle (not shown), and a spindle mounting hole 26 is formed in the approximate center of the spindle support plate 18.

  Further, the spindle support plate 18 includes two disc brake mounting portions 30a and 30b that constitute an attachment portion for attaching the spindle support plate 18 to a disc brake of a wheel (not shown), which is an attachment object, outside the welded portion 24. The disc brake mounting portions 30a and 30b are formed with mounting holes 32a and 32b.

  The disc brake mounting portions 30a and 30b are deformed in a direction away from the mounting surface on the disc brake side due to welding thermal distortion at the time of welding the entire circumference of the end of the trailing arm 14 to the spindle support plate 18. , 32b may be misaligned, or the positions of the mounting holes 32a, 32b may be misaligned.

  Therefore, as shown in FIG. 3, bent portions 34a and 34b are formed in the vicinity of the disc brake mounting portions 30a and 30b, and pushing portions 36a and 36b are formed on the side surfaces of the disc brakes of the disc brake mounting portions 30a and 30b. ing.

  The bent portions 34a and 34b are formed so that the angles of the mounting holes 32a and 32b become normal angles when the disc brake mounting portions 30a and 30b are deformed in a direction away from the mounting surface on the disc brake side due to thermal distortion during welding. The disc brake mounting portions 30a and 30b are inclined to the disc brake side in anticipation of the amount of deformation in advance, and are formed at positions outside the welded portion in the vicinity of the disc brake mounting portions 30a and 30b of the spindle support plate 18. It has become so.

  The inclination angle θ1 of the disc brake mounting portions 30a and 30b is set in the range of 0.1 ° to 1.0 ° in view of the deformation amount of the disc brake mounting portions 30a and 30b.

  In this manner, the disc brake mounting portions 30a and 30b are inclined toward the disc brake side by the bent portions 34a and 34b formed at the outer positions of the welded portions in the vicinity of the disc brake mounting portions 30a and 30b of the spindle support plate 18. Even if the disc brake mounting portions 30a and 30b are deformed in a direction away from the mounting surface on the disc brake side due to welding thermal distortion when the entire circumference of the trailing arm 14 is welded to the spindle support plate 18, the amount of deformation is determined in advance. If the disc brake mounting portions 30a and 30b are inclined to the disc brake side in anticipation, the angles of the mounting holes 32a and 32b can be ensured with high accuracy after welding.

  The push-in portions 36a and 36b are arranged in advance so that the mounting holes 32a and 32b are at regular positions in the X and Y directions in FIG. 2 when the disc brake mounting portions 30a and 30b are deformed due to thermal distortion during welding. In anticipation of the amount of deformation, the disc brake side surfaces of the disc brake mounting portions 30a and 30b are pressed and crushed to adjust the positions of the mounting holes 32a and 32b in the X and Y directions. This is done by the press work used.

  Further, the pushing amount S of the pushing portions 36a and 36b is set in the range of 0.1 to 1.0 mm in consideration of the deformation amount at the time of welding of the disc brake mounting portions 30a and 30b.

  As described above, the push-in portions 36a and 36b formed on the disc brake side surfaces of the disc brake mounting portions 30a and 30b allow for the positional displacement of the mounting holes 32a and 32b caused by thermal distortion during welding, so that the mounting holes 32a and 32b By adjusting the position, the positions of the mounting holes 32a and 32b can be secured with high accuracy after welding.

  Further, the adjustment of the inclination angle θ by the bent portions 34a and 34b and the pushing amount S of the pushing portions 36a and 36b in each of the disc brake attaching portions 30a and 30b is performed reliably in the respective disc brake attaching portions 30a and 30b. Accuracy is maintained.

  Further, the push-in portions 36a and 36b are configured such that the push-in surface 38 is inclined at a predetermined angle θ2 so that the push-in surface 38 is parallel to the mounting surface 40 during adjustment by the push-in portions 36a and 36b after welding.

  Thus, the surface accuracy with the attachment surface 40 after welding can be easily adjusted by giving the pushing surface 38 the inclination of the predetermined angle θ2.

  The inclination of the pushing surface 38 is lowered from the proximal end side toward the protruding distal end, and the angle θ2 is set in the range of 0.1 to 1.0 °.

  Therefore, it is possible to reliably eliminate the influence of deformation due to thermal distortion of the disc brake mounting portions 30a and 30b during welding without performing cutting or mounting of separate parts, and the pushing portions 36a and 36b use coining. Since it can be formed by press working, the cost can be reduced.

  The present invention is not limited to the above-described embodiment, and can be modified into various forms within the scope of the gist of the present invention.

  For example, in the above-described embodiment, the mounting structure between the trailing arm of the torsion beam suspension and the spindle support plate has been described as the component mounting structure. However, the present invention is not limited to this example. This can be applied to parts whose dimensions are changed by welding in the case of welding products.

1 is a schematic perspective view of a torsion beam suspension according to an embodiment of the present invention. FIG. 2 is an enlarged front view of a disc brake mounting portion in FIG. 1. FIG. 3 is a partially enlarged plan view seen from the III direction in FIG. 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Torsion beam type suspension 12 Torsion beam 14 Trailing arm 16 Trailing arm support part 18 Spindle support plate 24 Welding part 30a, 30b Disc brake attachment part 32a, 32b Mounting hole 34a, 34b Bending part 36a, 36b Pushing part 38 Pushing surface 40 Attachment Surface θ2 Inclination angle

Claims (2)

Mounting parts to be attached to the mounting object;
A component mounting structure having a mounting portion with a mounting hole protruding sideways and having a press-molded product that is attached to the end of the mounting component by welding,
A bent portion for inclining the attachment portion toward the attachment object is formed near the attachment portion of the press-formed product at the outer position of the weld portion, and the attachment object side surface is formed on the attachment object side surface of the attachment portion. A push-in portion for adjusting the position of the mounting hole by pressing is formed, and the push-in portion is inclined at a predetermined angle so that the push-in surface is parallel to the mounting surface during adjustment by the push-in portion after welding. Parts mounting structure characterized by having it. In claim 1,
The push-in portion is formed by coining processing.

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