JP2019156097A - Torsion beam type suspension - Google Patents

Abstract

To enable reducing the number of assembly processes while adopting a structure of reinforcing a left edge part 1a and a right edge part 1b of a torsion beam 1 by a left side gusset 6 and a right side gusset 7, in a torsion beam type suspension.SOLUTION: A third joint piece 4d of a left side spring seat 4 is joined to a position below a joining part of a left side gusset 6 to a left edge part 1a of a torsion beam 1 in a left side gusset 6. A sixth joint piece 5d of a right side spring seat 5 is joined (11) to a position below a joining part 10 of a right side gusset 7 to a right edge part 1b of the torsion beam 1 in a right side gusset 7.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a torsion beam suspension.

  For example, a torsion beam type suspension described in Patent Document 1 is connected to a torsion beam arranged along the left-right direction of a vehicle, a left trailing arm connected to the left end of the torsion beam, and a right end of the torsion beam. A right trailing arm, a left spring seat for supporting a suspension spring joined to the left end of the torsion beam and the left trailing arm, and a suspension spring joined to the right end of the torsion beam and the right trailing arm And a right side spring seat for support.

JP 2017-178248 A

  The inventor of the present application has earnestly studied to use a gusset (reinforcing plate) to reinforce the left end portion and the right end portion (the connecting portion of the left and right spring seats) of the torsion beam.

  In the process, for example, the gussets are joined to the left end portion and the right end portion of the torsion beam, respectively, and then the left and right spring seats are positioned above the joint portions with the gussets at the left end portion and the right end portion of the torsion beam. It was considered to form a joining piece.

  However, in that case, for example, the joint portion of the gusset with respect to the torsion beam is hidden by the joining piece of the spring seat (see, for example, FIG. 5). In FIG. 5, reference numeral 101 is a torsion beam, 102 is a right trailing arm, 103 is a right spring seat, 104 is a right gusset, 103a is one end side joining piece, 103b is the other end side joining piece, 103c is an intermediate joining piece, Reference numeral 105 denotes a joint (weld bead).

  Therefore, before joining the joining pieces of the left and right spring seats to the torsion beam, it is necessary to check the state (inspection) of the joining portion of the left and right gussets with respect to the torsion beam.

  That is, after performing the inspection, it is necessary to perform the operation of joining the joining pieces of the left and right spring seats to the torsion beam, and thereafter, check the state (inspection) of the joining portion.

  For this reason, there is a concern that the number of assembly steps of the torsion beam type suspension increases and the manufacturing cost increases.

  In view of such circumstances, the present invention is capable of suppressing an increase in the number of assembly steps while adopting a configuration in which the left end portion and the right end portion of the torsion beam are reinforced with the left side gusset and the right side gusset in the torsion beam type suspension. It is aimed.

  A torsion beam type suspension according to the present invention includes a torsion beam arranged along the left-right direction of the vehicle, a left trailing arm connected to the left end of the torsion beam, and a right trailing arm connected to the right end of the torsion beam. A suspension spring supporting left spring seat having a first joining piece joined to the left end of the torsion beam and a second joining piece joined to the left trailing arm, and a first joined to the right end of the torsion beam. A right spring seat for supporting a suspension spring having four joint pieces and a fifth joint piece joined to the right trailing arm, and the torsion beam joined to a region from a left end edge to a joint portion of the first joint piece. Left gusset and right edge of the torsion beam A right gusset that is bonded to a region up to the bonding portion of the fourth bonding piece, and the left spring seat is bonded to the left gusset between the first bonding piece and the second bonding piece. A third joint piece to be joined to the right gusset is provided between the fourth joint piece and the fifth joint piece in the right spring seat. The third joining piece is joined to a position below the joining portion of the left gusset with respect to the left end portion of the torsion beam in the left gusset, and the sixth joining piece is joined to the right end of the torsion beam in the right gusset. It is characterized by being joined at a position below the joint of the right gusset with respect to the part.

  In this configuration, since the joint portion of the third joint piece with respect to the left gusset is positioned below the joint portion of the left gusset with respect to the left end portion of the torsion beam, both joint portions are provided with the left spring. It is exposed without being hidden by the sheet.

  This makes it possible to continuously perform the joining process of the left gusset to the left end of the torsion beam and the joining process of the third joining piece to the left gusset, and after both joining operations. It is possible to confirm (inspect) the state of both joints together. That is, it is not necessary to perform the inspection at the end of each joining process.

  Meanwhile, since the joint portion of the sixth joint piece with respect to the right gusset is positioned below the joint portion of the right gusset with respect to the right end portion of the torsion beam, both the joint portions are formed by the right spring seat. It comes to be exposed without hiding.

  This makes it possible to continuously perform the bonding process of the right gusset to the right end portion of the torsion beam and the bonding process of the sixth bonding piece to the right gusset, and after both the bonding processes. It is possible to confirm (inspect) the state of both joints together. That is, it is not necessary to perform the inspection at the end of each joining process.

  For this reason, the number of assembling steps of the torsion beam type suspension can be reduced as compared with the case described in the item “Problems to be solved by the invention”. Accordingly, it is possible to suppress an increase in the number of assembly steps while adopting a configuration in which the left end portion and the right end portion of the torsion beam are reinforced by the left gusset and the right gusset, respectively.

  According to the torsion beam type suspension according to the present invention, it is possible to suppress an increase in the number of assembly steps while adopting a configuration in which the left end portion and the right end portion of the torsion beam are reinforced with the left side gusset and the right side gusset, respectively. It will be possible to contribute to cost reduction.

1 is a plan view showing an embodiment of a torsion beam suspension according to the present invention. FIG. 2 is an exploded perspective view showing a left trailing arm of the torsion beam suspension of FIG. 1. FIG. 2 is an enlarged view of the right side of the torsion beam suspension of FIG. 1 viewed from the rear side of the vehicle. It is the perspective view which looked at FIG. 3 from the vehicle inner side. It is a comparative example of this invention, and is a figure corresponding to FIG.

  BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the accompanying drawings.

  1 to 4 show an embodiment of the present invention. The torsion beam type suspension of the illustrated example includes a torsion beam 1, a left trailing arm 2, a right trailing arm 3, a left spring seat 4, a right spring seat 5, a left gusset 6, a right gusset 7, and the like.

  Further, Fr represents the vehicle front side, Rr represents the vehicle rear side, Lh represents the vehicle left side, Rh represents the vehicle right side, and Up represents the vehicle upper side.

  The torsion beam 1 is disposed along the left-right direction of the vehicle, and is formed in a mountain shape that is open toward the lower side of the vehicle, and has flanges 1c, 1d at both ends in the width direction (vehicle front-rear direction). Is provided.

  The left trailing arm 2 and the right trailing arm 3 transmit and absorb the reaction force of the suspension spring to the vehicle body by swinging up and down the reaction force from the road surface received via a wheel (not shown). As shown in FIGS. 1 to 4, both have inner arms 2a and 3a, outer arms 2b and 3b, carriers 2c and 3c, support portions 2d and 3d, and the like.

  The left trailing arm 2 is connected to the left end 1 a of the torsion beam 1, and the right trailing arm 3 is connected to the right end 1 b of the torsion beam 1. A stabilizer 8 is installed between the left trailing arm 2 and the right trailing arm 3.

  The left spring seat 4 and the right spring seat 5 support a suspension spring (not shown). The left spring seat 4 includes a spring seat 4a, a first joining piece 4b, a second joining piece 4c, and a third joining. The right spring seat 5 is provided with a spring seat 5a, a fourth joining piece 5b, a fifth joining piece 5c, a sixth joining piece 5d, and the like.

  The first joining piece 4 b is joined to the left end 1 a of the torsion beam 1. The second joining piece 4 c is joined to the left trailing arm 2. The third joining piece 4d is provided between the first joining piece 4b and the second joining piece 4c, and is joined to the left gusset 6.

  The fourth joining piece 5 b is joined to the right end 1 b of the torsion beam 1. The fifth joining piece 5 c is joined to the right trailing arm 3. The sixth joining piece 5d is provided between the fourth joining piece 5b and the fifth joining piece 5c, and is joined to the right gusset 7.

  In this embodiment, a seventh joint piece 4e joined to the left trailing arm 2 is provided between the second joint piece 4c and the third joint piece 4d in the left spring seat 4, and the right side In the spring seat 5, an eighth joining piece 5e joined to the right trailing arm 3 is provided between the fifth joining piece 5c and the sixth joining piece 5d. However, the present invention includes those not provided with the seventh joining piece 4e and the eighth joining piece 5e.

  The left gusset 6 reinforces the left end portion 1a of the torsion beam 1 by being joined to a region from the left end edge to the joining portion (not shown) of the first joining piece 4b in the torsion beam 1.

  The right gusset 7 reinforces the right end 1b of the torsion beam 1 by being joined to the region from the right end edge to the joint (see reference numeral 11) of the fourth joining piece 5b in the torsion beam 1.

  As shown in FIG. 2, since the flanges 1c and 1d are not formed at the left end 1a and the right end 1b of the torsion beam 1, the flanges 1c and 1d exist at the left end 1a and the right end 1b of the torsion beam 1. The left gusset 6 and the right gusset 7 are joined to the unexposed area.

  In this embodiment, the details of the right end 1b of the torsion beam 1 are shown in FIGS. 3 and 4, but the left end 1a is the same as the right end 1b, so that the left end 1a of the torsion beam 1 is shown in detail. Is omitted.

  In this embodiment, the third joining piece 4d is joined to a position below the joining portion (weld bead, not shown) of the left gusset 6 with respect to the left end portion 1a of the torsion beam 1 in the left gusset 6. The joining piece 5d is joined to a position below the joining portion (weld bead) 10 of the right gusset 7 with respect to the right end portion 1b of the torsion beam 1 in the right gusset 7. In addition, the code | symbol 11 is attached | subjected to the junction part of the 6th junction piece 5d with respect to the right side gusset 7. FIG.

  In this way, since the joint portion of the third joint piece 4d with respect to the left gusset 6 is positioned below the joint portion of the left gusset 6 with respect to the left end portion 1a of the torsion beam 1, both the joint portions are on the left spring seat. 4 will be exposed without being hidden.

  This makes it possible to continuously perform the joining process of the left gusset 6 to the left end 1a of the torsion beam 1 and the joining process of the third joining piece 4d to the left gusset 6, and after both joining processes. Thus, it is possible to check the state (inspection) of both joints together. That is, it is not necessary to perform the inspection at the end of each joining process.

  On the other hand, since the joint portion 11 of the sixth joint piece 5d with respect to the right gusset 7 is positioned below the joint portion 10 of the right gusset 7 with respect to the right end portion 1b of the torsion beam 1, both the joint portions 10, 11 are arranged. Is exposed without being hidden by the right spring seat 5.

  This makes it possible to continuously perform the bonding process of the right gusset 7 to the right end 1b of the torsion beam 1 and the bonding process of the sixth bonding piece 5d to the right gusset 7, and after both the bonding processes. Thus, it is possible to confirm the state (inspection) of the joints 10 and 11 together. That is, it is not necessary to perform the inspection at the end of each joining process.

  For this reason, the number of assembling steps of the torsion beam type suspension can be reduced as compared with the case described in the item “Problems to be solved by the invention”. Therefore, it is possible to suppress an increase in the number of assembly steps while adopting a configuration in which the left end portion 1a and the right end portion 1b of the torsion beam 1 are reinforced by the left gusset 6 and the right gusset 7, respectively. As a result, it is possible to contribute to a reduction in manufacturing cost of the torsion beam type suspension.

  In addition, this invention is not limited only to the said embodiment, It can change suitably in the range equivalent to the claim and the said range.

  The torsion beam suspension according to the present invention can be suitably used for a vehicle such as an automobile.

1 Torsion beam
1a Left end
1b Right end 2 Left trailing arm 3 Right trailing arm 4 Left spring seat
4a Spring seat
4b 1st joining piece
4c Second joint piece
4d Third joint piece 5 Right spring seat
5a Spring seat
5b Fourth joint piece
5c 5th joining piece
5d 6th joint piece 6 Left gusset 7 Right gusset 8 Stabilizer 10 Joint part of right gusset 7 to right end 1b of torsion beam 1 11 Joint part of sixth joint piece 5d to right gusset 7

Claims (1)

A torsion beam arranged along the left-right direction of the vehicle,
A left trailing arm connected to the left end of the torsion beam;
A right trailing arm connected to the right end of the torsion beam;
A left spring seat for supporting a suspension spring having a first joint piece joined to the left end of the torsion beam and a second joint piece joined to the left trailing arm;
A right spring seat for supporting a suspension spring having a fourth joint piece joined to the right end of the torsion beam and a fifth joint piece joined to the right trailing arm;
A left gusset joined to a region from a left end edge to a joint of the first joint piece in the torsion beam;
A right gusset bonded to a region from a right end edge to a bonded portion of the fourth bonded piece in the torsion beam,
In the left spring seat, a third joint piece joined to the left gusset is provided between the first joint piece and the second joint piece,
In the right spring seat, a sixth joining piece joined to the right gusset is provided between the fourth joining piece and the fifth joining piece,
The third joining piece is joined to a position below the joining portion of the left gusset with respect to the left end portion of the torsion beam in the left gusset,
The torsion beam suspension, wherein the sixth joining piece is joined to a position below the joining portion of the right gusset with respect to the right end portion of the torsion beam in the right gusset.

Images