A welding fixture for a rear suspension carrier

Abstract

The utility model discloses a kind of welding fixtures of rear suspension support, comprising: locating seat;First locating groove, for limiting the position of accessory two;Second locating groove, for limiting the position of accessory three;Third locating groove can be matched with the outer periphery of shaft sleeve to limit the radial position of shaft sleeve;Two locating parts, two locating parts are used to limit the front side and rear side of accessory one respectively;First horizontal clamping mechanism, including first clamping piece and second clamping piece, first clamping piece can drive accessory two to abut the left side of accessory one, second clamping piece can drive accessory three to abut the right side of accessory one, so that accessory two and accessory three clamp accessory one;Axial clamping mechanism, including two third clamping pieces, two third clamping pieces clamp the both ends of shaft sleeve respectively, to limit the axial position of shaft sleeve.The utility model can reduce the case that manual support accessory or repeatedly adjust the position of accessory, improve the clamping efficiency of accessory.

Description

Technical Field

[0001] This utility model relates to the technical field of clamps, and in particular to a welding clamp for a rear suspension bracket. Background Technology

[0002] In the manufacturing of the rear suspension system, the rear suspension bracket is a key load-bearing and connecting component, and its welding quality is directly related to the safety and reliability of the entire vehicle.

[0003] The structure of the rear suspension bracket typically consists of three main stamped parts, as shown in the reference. Figure 1 and Figure 2 The components are Component 1 330, Component 2 340, and Component 3 350. Component 2 340 and Component 3 350 each have a first through hole 370 and two second through holes 380. The first through hole 370 is located between the two second through holes 380. Component 1 330 serves as the core connector, and its left and right sides are welded to Component 2 340 and Component 3 350, respectively. Component 2 340 and Component 3 350 are also welded together. A bushing 360 is welded together between Component 2 340 and Component 3 350, and the bushing 360 is located inside the first through hole 370. Because this rear suspension bracket needs to withstand complex road loads and impacts, all its components are manufactured using a stamping process and designed with a high-strength, lightweight, complex three-dimensional curved surface structure.

[0004] Currently, in the welding production of this type of rear suspension bracket, traditional general-purpose welding fixtures or simple positioning tooling are commonly used. When dealing with parts with complex spatial curved surfaces, operators usually need to manually adjust and straighten the spatial positions of parts two and three relative to part one. This process not only heavily relies on the experience and skill of the operators, making the operation difficult, but also has extremely low clamping efficiency. Utility Model Content

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a welding fixture for a rear suspension bracket, which can reduce the need for manual support or repeated adjustments to the position of the parts, greatly shortening the clamping time and improving the clamping efficiency.

[0006] A welding fixture for a rear suspension bracket according to an embodiment of the present invention includes: a positioning seat; a first positioning groove disposed on the left side of the positioning seat, the first positioning groove being used to limit the position of a second component; a second positioning groove disposed on the right side of the positioning seat, the second positioning groove being used to limit the position of a third component; a third positioning groove disposed on the top of the positioning seat, the third positioning groove being able to match the outer periphery of the bushing to limit the radial position of the bushing; a positioning part disposed on the top of the positioning seat, the positioning part being used to limit the front and rear sides of a first component, the second component and the third component respectively abutting the left and right sides of the first component; a first horizontal clamping mechanism including a first clamping member and a second clamping member, the first clamping member being able to drive the second component to abut the left side of the first component, the second clamping member being able to drive the third component to abut the right side of the first component, so that the second component and the third component clamp the first component; and an axial clamping mechanism including two third clamping members, the two third clamping members respectively clamping the two ends of the bushing to limit the axial position of the bushing.

[0007] A welding fixture for a rear suspension bracket according to an embodiment of the present invention has at least the following beneficial effects: 1. This utility model, by setting a first positioning groove, a second positioning groove, a third positioning groove, and two positioning parts, allows the bushing to pass through the first through holes of accessory two and accessory three. Then, the first positioning groove restricts the position of accessory two, the second positioning groove restricts the position of accessory three, and the third positioning groove restricts the position of the bushing. Next, the two positioning parts restrict the front-to-back position of accessory one, placing accessory one between accessory two and accessory three. Accessories two and accessory three restrict the left-to-right position of accessory one. Thus, the positioning and placement of accessory one, accessory two, accessory three, and bushing are convenient, eliminating the need for manual support or repeated adjustment of accessory positions, greatly shortening the clamping time of parts and improving the clamping efficiency of parts.

[0008] 2. This utility model, by setting a first clamping member, a second clamping member, and two third clamping members, uses the first clamping member to abut against the second part and the second clamping member to abut against the third part, so that the second and third parts clamp the first part, that is, the first, second, and third parts are clamped together in the horizontal direction. The two third clamping members respectively clamp the two ends of the bushing, thereby preventing the position of the parts from shifting during welding and ensuring the geometric dimensional accuracy of the welded product.

[0009] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket further includes a pressing mechanism, wherein the pressing mechanism includes a fourth clamping member, and the fourth clamping member and the positioning seat are capable of clamping the accessory one from above and below.

[0010] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided, wherein two fourth clamping members are provided, and the two fourth clamping members are respectively used to clamp the front and rear sides of the first component.

[0011] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided, wherein two first clamping members are provided, the two first clamping members being distributed along the front-rear direction of the positioning seat, and two second clamping members are provided, the two second clamping members being distributed along the front-rear direction of the positioning seat.

[0012] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided. The first clamping member is provided with a first driving rod, which is used to abut against the side wall of the second accessory. The first driving rod is provided with a first positioning pin, which is used to cooperate with the second through hole of the second accessory. The second clamping member is provided with a second driving rod, which is used to abut against the side wall of the third accessory. The second driving rod is provided with a second positioning pin, which is used to cooperate with the second through hole of the third accessory.

[0013] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided, wherein the third clamping member has a third driving rod, the third driving rod is used to abut against the end of the bushing, and the third driving rod is provided with a third positioning pin, the third positioning pin being used to cooperate with the inside of the bushing.

[0014] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided on the left side of the positioning seat. The first limiting member includes a first limiting part and a second limiting part disposed on the first limiting part. A first positioning groove is formed between the first limiting part, the second limiting part and the left side of the positioning seat. A second limiting member is provided on the right side of the positioning seat. The second limiting member includes a third limiting part and a fourth limiting part disposed on the third limiting part. A second positioning groove is formed between the third limiting part, the fourth limiting part and the right side of the positioning seat.

[0015] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided, wherein the top of the second limiting part and the fourth limiting part are both provided with a first arc part, and after the bushing passes through the first through hole, the first arc part can support the bushing.

[0016] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided on the left side of the positioning seat. The two first support members are arranged along the front-rear direction of the positioning seat, and the two first support members are respectively used to support the arc-shaped wall at the bottom of accessory two. The two second support members are arranged on the right side of the positioning seat. The two second support members are arranged along the front-rear direction of the positioning seat, and the two second support members are respectively used to support the arc-shaped wall at the bottom of accessory three.

[0017] According to an embodiment of the present invention, a welding fixture for a rear suspension bracket is provided, wherein the accessory has a first through hole and a second through hole, one of the positioning parts can be positioned by abutting against the flange of the first through hole, and the other positioning part can be positioned by abutting against the flange of the second through hole.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the rear suspension bracket according to an embodiment of the present utility model; Figure 2 This is a structural schematic diagram of the rear suspension bracket from another perspective of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of a welding fixture for a rear suspension bracket; Figure 4 for Figure 3 A schematic diagram of the welding fixture for a rear suspension bracket from another perspective is shown; Figure 5 for Figure 3 A schematic diagram of the welding fixture for a rear suspension bracket from another perspective is shown.

[0021] Reference numerals: 100-Positioning seat, 110-First positioning groove, 120-Second positioning groove, 130-Third positioning groove, 140-Positioning part, 150-First clamping member, 160-Second clamping member, 170-Third clamping member, 180-Fourth clamping member, 190-First drive rod, 200-First positioning pin, 210-Second drive rod, 220-Second positioning pin, 230-Third drive rod, 240-Third positioning pin, 250-First Limiting component, 260-first limiting part, 270-second limiting part, 280-second limiting component, 290-third limiting part, 300-fourth limiting part, 310-first arc part, 320-first support component, 330-accessory one, 340-accessory two, 350-accessory three, 360-shoulder sleeve, 370-first through hole, 380-second through hole, 390-first through hole, 400-second through hole, 410-flanged edge, 420-second support component. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0025] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] The following description, in conjunction with the accompanying drawings, describes a welding fixture for a rear suspension bracket according to an embodiment of the present invention.

[0027] This utility model aims to provide an embodiment of a welding fixture for a rear suspension bracket.

[0028] Reference Figure 1 and Figure 2The rear suspension bracket includes component 1 330, component 2 340 and component 3 350. Component 2 340 and component 3 350 each have a first through hole 370 and two second through holes 380. The first through hole 370 is located between the two second through holes 380. The left and right sides of component 1 330 are welded to component 2 340 and component 3 350 respectively. A bushing 360 is welded together between component 2 340 and component 3 350, and the bushing 360 is located inside the first through hole 370.

[0029] A welding fixture for a rear suspension bracket according to an embodiment of this utility model, referring to... Figure 3 , Figure 4 and Figure 5 The system includes a positioning seat 100, a first positioning groove 110, a second positioning groove 120, a third positioning groove 130, two positioning parts 140, a first horizontal clamping mechanism, and an axial clamping mechanism. The first positioning groove 110 is located on the left side of the positioning seat 100 and is used to limit the position of accessory 2 340. The second positioning groove 120 is located on the right side of the positioning seat 100 and is used to limit the position of accessory 350. The third positioning groove 130 is located on the top of the positioning seat 100. After the bushing 360 passes through the first through hole 370 of accessory 2 340 and accessory 350, the third positioning groove 130 can match the outer periphery of the bushing 360 to limit the radial position of the bushing 360. The two positioning parts... Positioning parts 140 are located on the top of positioning base 100. The two positioning parts 140 are used to restrict the front and rear sides of accessory 1 330, respectively. Accessory 2 340 and accessory 350 abut against the left and right sides of accessory 1 330, respectively. The first horizontal clamping mechanism includes a first clamping member 150 and a second clamping member 160. The first clamping member 150 can drive accessory 2 340 to abut against the left side of accessory 1 330, and the second clamping member 160 can drive accessory 350 to abut against the right side of accessory 1 330, so that accessory 2 340 and accessory 350 clamp accessory 1 330. The axial clamping mechanism includes two third clamping members 170. The two third clamping members 170 clamp the two ends of bushing 360, respectively, to restrict the axial position of bushing 360.

[0030] It is understood that this utility model, by setting a first positioning groove 110, a second positioning groove 120, a third positioning groove 130 and two positioning parts 140, allows the bushing 360 to pass through the first through hole 370 of accessory 2 340 and accessory 350. Then, the first positioning groove 110 restricts the position of accessory 2 340, the second positioning groove 120 restricts the position of accessory 350, and the third positioning groove 130 restricts the position of bushing 360. Next, the two positioning parts 140 restrict the front-to-back position of accessory 1 330, so that accessory 1 330 is located between accessory 2 340 and accessory 350. Accessories 2 340 and accessory 350 restrict the left-to-right position of accessory 1 330. Thus, the positioning and placement of accessory 1 330, accessory 2 340, accessory 350 and bushing 360 are convenient, without the need for manual support of accessories or repeated adjustment of the position of accessories, greatly shortening the clamping time of parts and improving the clamping efficiency of accessories.

[0031] Furthermore, by setting a first clamping member 150, a second clamping member 160, and two third clamping members 170, the first clamping member 150 abuts against accessory 2 340, and the second clamping member 160 abuts against accessory 350, so that accessory 2 340 and accessory 350 clamp accessory 1 330, that is, accessory 1 330, accessory 2 340, and accessory 3 350 are clamped together in the horizontal direction. The two third clamping members 170 clamp the two ends of the bushing 360 respectively, thereby preventing the position of the accessories from shifting during welding and ensuring the geometric dimensional accuracy of the welded product.

[0032] In some embodiments of this utility model, reference is made to Figure 3 , Figure 4 and Figure 5 It also includes a pressing mechanism, which includes a fourth clamping member 180, and the fourth clamping member 180 and the positioning seat 100 are capable of clamping the accessory 330 from above and below.

[0033] Understandably, by setting the fourth clamping member 180, the fourth clamping member 180 applies pressure to the accessory 330 from the vertical direction, firmly pressing it onto the positioning part 140, effectively resisting the tendency of the accessory 330 to tilt upwards due to thermal stress during the welding process, and greatly reducing the welding misalignment of the accessory 330.

[0034] In some embodiments of this utility model, two fourth clamping members 180 are provided, and the two fourth clamping members 180 are respectively used to clamp the front and rear sides of the accessory 330.

[0035] Understandably, the two fourth clamping elements 180 are applied to the front and rear sides of accessory 330 respectively, providing balanced downward pressure and avoiding twisting or positioning deviation of accessory 330 that may be caused by single-point clamping, thus further ensuring welding stability.

[0036] In some embodiments of this utility model, reference is made to Figure 3 , Figure 4 and Figure 5 There are two first clamping members 150, which are distributed along the front and rear direction of the positioning seat 100. There are also two second clamping members 160, which are distributed along the front and rear direction of the positioning seat 100.

[0037] Understandably, the two first clamping members 150 and the two second clamping members 160, distributed front and rear, can provide a uniformly distributed clamping force to the accessory 2 340 and accessory 3 350, which have a large span.

[0038] In some embodiments of this utility model, reference is made to Figure 4 and Figure 5 The first clamping member 150 is provided with a first driving rod 190, which is used to abut against the side wall of accessory 2 340. The first driving rod 190 is provided with a first positioning pin 200, which is used to cooperate with the second through hole 380 of accessory 2 340. The second clamping member 160 is provided with a second driving rod 210, which is used to abut against the side wall of accessory 3 350. The second driving rod 210 is provided with a second positioning pin 220, which is used to cooperate with the second through hole 380 of accessory 3 350.

[0039] Understandably, the first positioning pin 200 mates with the second through hole 380 on accessory 2 340, and the second positioning pin 220 mates with the second through hole 380 on accessory 3 350, to ensure that the mating surfaces of accessory 2 340, accessory 3 350 and accessory 1 330 are not misaligned.

[0040] In some embodiments of this utility model, the third clamping member 170 has a third driving rod 230, which is used to abut against the end of the bushing, and the third driving rod 230 is provided with a third positioning pin 240, which is used to cooperate with the inside of the bushing 360.

[0041] Understandably, the third locating pin 240 is inserted into the inner hole of the bushing 360 for positioning, directly constraining the radial position of the bushing 360 from the inside, and further restricting the position of accessory 2 340 and accessory 3 350 in the vertical direction, thereby ensuring the precision of product welding.

[0042] In some embodiments of this utility model, a first limiting member 250 is provided on the left side of the positioning seat 100. The first limiting member 250 includes a first limiting part 260 and a second limiting part 270 disposed on the first limiting part 260. A first positioning groove 110 is formed between the first limiting part 260, the second limiting part 270 and the left side of the positioning seat 100. A second limiting member 280 is provided on the right side of the positioning seat 100. The second limiting member 280 includes a third limiting part 290 and a fourth limiting part 300 disposed on the third limiting part 290. A second positioning groove 120 is formed between the third limiting part 290, the fourth limiting part 300 and the right side of the positioning seat 100.

[0043] It is understandable that a first limiting member 250 can be provided on the middle left side of the positioning base 100, and a first positioning groove 110 can be formed by the first limiting part 260 and the second limiting part 270, etc. Similarly, a second limiting member 280 can be provided on the middle right side of the positioning base 100, and a second positioning groove 120 can be formed by the third limiting part 290 and the fourth limiting part 300, etc., so as to facilitate the quick placement of accessory 2 340 and accessory 350 on the second positioning groove 120 and the third positioning groove 130, respectively.

[0044] In some embodiments of this utility model, the top of the second limiting part 270 and the fourth limiting part 300 are both provided with a first arc part 310. After the bushing passes through the first through hole 370, the first arc part 310 can support the bushing.

[0045] Understandably, the first arc portion 310 provides auxiliary support for the bushing 360 after it is inserted, preventing it from sagging off the theoretical center line due to the weight of the bushing 360 itself or external forces during the clamping process, thus preparing for the precise clamping of the third clamping member 170.

[0046] In some embodiments of this utility model, two first support members 320 are provided on the left side of the positioning base 100. The two first support members 320 are along the front-back direction of the positioning base 100 and are used to support the arc-shaped wall at the bottom of accessory 2 340. Two second support members 420 are provided on the right side of the positioning base 100. The two second support members 420 are along the front-back direction of the positioning base 100 and are used to support the arc-shaped wall at the bottom of accessory 3 350.

[0047] Understandably, the first support member 320 and the second support member 420 use their curved walls to support the bottom of accessory 2 340 and accessory 3 350 respectively, providing a solid bottom support foundation for accessory 2 340 and accessory 3 350.

[0048] In some embodiments of this utility model, accessory 330 has a first through hole 390 and a second through hole 400. One positioning part 140 can be positioned by abutting against the flange 410 of the first through hole 390, and another positioning part 140 can be positioned by abutting against the flange 410 of the second through hole 400.

[0049] It is understandable that the second perforation 400 and the flange 410 of the second perforation 400 inherent on the accessory 330 serve as positioning references. The flange 410 is formed by stamping. The flange 410 of each accessory 330 has high dimensional consistency and is a high-precision processing feature. Using this as a reference to constrain the accessory 330 results in high positioning accuracy of the accessory 330.

[0050] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0051] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A welding fixture for a rear suspension bracket, characterized in that, include: Positioning seat (100); The first positioning groove (110) is provided on the left side of the positioning seat (100), and the first positioning groove (110) is used to limit the position of accessory two (340); The second positioning groove (120) is provided on the right side of the positioning seat (100), and the second positioning groove (120) is used to limit the position of accessory three (350); The third positioning groove (130) is disposed on the top of the positioning seat (100), and the third positioning groove (130) can match the outer periphery of the bushing (360) to limit the radial position of the bushing (360); A positioning part (140) is provided on the top of the positioning seat (100). The positioning part (140) is used to limit the front and rear sides of accessory one (330). Accessory two (340) and accessory three (350) respectively abut against the left and right sides of accessory one (330). The first horizontal clamping mechanism includes a first clamping member (150) and a second clamping member (160). The first clamping member (150) can drive accessory two (340) to abut against the left side of accessory one (330), and the second clamping member (160) can drive accessory three (350) to abut against the right side of accessory one (330), so that accessory two (340) and accessory three (350) clamp accessory one (330). The axial clamping mechanism includes two third clamping members (170), which clamp the two ends of the bushing (360) respectively to limit the axial position of the bushing (360).

2. The welding fixture for a rear suspension bracket according to claim 1, characterized in that, It also includes a pressing mechanism, which includes a fourth clamping member (180) and the positioning seat (100) capable of clamping accessory one (330) up and down.

3. The welding fixture for a rear suspension bracket according to claim 2, characterized in that, There are two fourth clamping members (180), and the two fourth clamping members (180) are used to clamp the front and rear sides of the accessory (330) respectively.

4. The welding fixture for a rear suspension bracket according to claim 1, characterized in that, Two first clamping members (150) are provided, and the two first clamping members (150) are distributed along the front-back direction of the positioning seat (100). Two second clamping members (160) are provided, and the two second clamping members (160) are distributed along the front-back direction of the positioning seat (100).

5. The welding fixture for a rear suspension bracket according to claim 1, characterized in that, The first clamping member (150) is provided with a first driving rod (190), which is used to abut against the side wall of accessory two (340). The first driving rod (190) is provided with a first positioning pin (200), which is used to cooperate with the second through hole (380) of accessory two (340). The second clamping member (160) is provided with a second driving rod (210), which is used to abut against the side wall of accessory three (350). The second driving rod (210) is provided with a second positioning pin (220), which is used to cooperate with the second through hole (380) of accessory three (350).

6. The welding fixture for a rear suspension bracket according to claim 1, characterized in that, The third clamping member (170) has a third drive rod (230) for abutting against the end of the bushing, and the third drive rod (230) is provided with a third positioning pin (240) for engaging with the inside of the bushing (360).

7. The welding fixture for a rear suspension bracket according to claim 1, characterized in that, A first limiting member (250) is provided on the left side of the positioning seat (100). The first limiting member (250) includes a first limiting part (260) and a second limiting part (270) disposed on the first limiting part (260). A first positioning groove (110) is formed between the first limiting part (260), the second limiting part (270) and the left side of the positioning seat (100). A second limiting member (280) is provided on the right side of the positioning seat (100). The second limiting member (280) includes a third limiting part (290) and a fourth limiting part (300) disposed on the third limiting part (290). A second positioning groove (120) is formed between the third limiting part (290), the fourth limiting part (300) and the right side of the positioning seat (100).

8. The welding fixture for a rear suspension bracket according to claim 7, characterized in that, The top of both the second limiting part (270) and the fourth limiting part (300) is provided with a first arc part (310). After the bushing passes through the first through hole (370), the first arc part (310) can support the bushing.

9. The welding fixture for a rear suspension bracket according to claim 1, characterized in that, Two first support members (320) are provided on the left side of the positioning seat (100). The two first support members (320) are along the front-back direction of the positioning seat (100) and are used to support the arc-shaped wall at the bottom of accessory two (340). Two second support members (420) are provided on the right side of the positioning seat (100). The two second support members (420) are along the front-back direction of the positioning seat (100) and are used to support the arc-shaped wall at the bottom of accessory three (350).

10. The welding fixture for a rear suspension bracket according to claim 1, characterized in that, The accessory (330) has a first through hole (390) and a second through hole (400). One of the positioning parts (140) can be positioned by abutting against the flange (410) of the first through hole (390), and the other positioning part (140) can be positioned by abutting against the flange (410) of the second through hole (400).

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