Energy absorption box welding jig

Abstract

An energy absorption box welding jig comprises a base, a linear driving element and two supports are arranged on the base, the linear driving element acts on at least one support to realize that the two supports are close to or away from each other; the opposite sides of the two supports are each provided with a clamping assembly, the clamping assembly comprises an upper clamping jaw, a lower clamping jaw, an upper limiting block and a lower limiting block, the upper limiting block and the lower limiting block are connected to the upper part and the lower part of the support respectively, the upper part of the support is provided with a first driving element and the first driving element acts on the upper clamping jaw; the lower part of the support is provided with a second driving element and the second driving element is used to drive the lower clamping jaw. The above scheme realizes effective fixation of two half-cylindrical structures through the two supports combined with the clamping assembly, so that the positions of the two half-cylindrical structures are fixed during subsequent welding, the welding quality is ensured, and after the welding is completed, the cylindrical structure can be easily taken out from between the two supports, and the operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the technical field of welding fixtures, and more specifically to a welding fixture for an energy-absorbing box. Background Technology

[0002] Energy-absorbing boxes are important energy-absorbing devices in automotive safety systems. They are installed between the crossbeams and the longitudinal beams of the vehicle frame, serving as a safety protection system. As a thin-walled metal component, the energy-absorbing box is prone to wrinkling and deformation during a collision. In low-speed collisions, it effectively absorbs collision energy and minimizes the impact force on the vehicle body. The energy-absorbing box improves the passive safety of the vehicle and reduces the repair costs caused by a collision.

[0003] During the manufacturing process of the energy-absorbing box, two U-shaped semi-cylindrical structures need to be joined together and welded to form a cylindrical structure. Existing technology involves placing one semi-cylindrical structure horizontally with its U-shaped opening facing upwards, then joining the other semi-cylindrical structure with its U-shaped opening facing downwards, followed by welding. However, this method does not effectively fix the two semi-cylindrical structures. Due to thermal deformation during welding, the resulting cylindrical structure may have shape errors, leading to non-compliance with quality requirements. Utility Model Content

[0004] The purpose of this invention is to solve the problem that the two semi-cylindrical structures of the existing energy-absorbing box are not effectively fixed during welding. Due to the thermal deformation during welding, the cylindrical structure formed after welding may have certain shape errors, resulting in non-compliance with quality requirements.

[0005] To solve the above problems, this utility model provides an energy-absorbing box welding fixture, including a base, on which a linear drive and two supports are provided. The linear drive acts on at least one support to make the two supports move closer or further apart.

[0006] Each of the two supports is provided with a clamping assembly on opposite sides. The clamping assembly includes an upper jaw, a lower jaw, an upper limit block, and a lower limit block. The upper limit block and the lower limit block are respectively connected to the upper and lower parts of the support. The middle part of the upper jaw is rotatably connected to the upper part of the support via a rotating shaft, and the rotating shaft is located above the upper limit block. The upper part of the support is provided with a first driving member, which acts on the upper end of the upper jaw and drives the upper jaw to rotate around the rotating shaft, so that the lower end of the upper jaw approaches or moves away from the upper limit block. The lower part of the support is provided with a second driving member, which drives the lower jaw to move in a direction parallel to the linear driving member, so that the lower jaw approaches or moves away from the lower limit block.

[0007] The above solution uses two supports. The upper supports, in conjunction with an upper limit block, clamp and limit the upper part of the semi-cylindrical structure, while the lower supports, in conjunction with a lower limit block, clamp and limit the lower part. After the two supports have clamped the semi-cylindrical structure using the clamping components, a linear drive moves the two supports closer together, allowing the two semi-cylindrical structures to align and be welded. After welding, the first drive rotates the upper supports around the axis, causing the lower end of the upper supports to move diagonally upwards and disengage from the top of the cylindrical structure. Simultaneously, the second drive moves the lower supports away from the lower limit block, allowing the welded cylindrical structure to be easily removed. Compared to existing technologies, this solution effectively fixes the two semi-cylindrical structures using two supports combined with clamping components, ensuring their position is fixed during subsequent welding and guaranteeing welding quality. Furthermore, the cylindrical structure can be easily removed from between the two supports after welding, making the operation simple and convenient.

[0008] In an improved embodiment, the first drive component includes a first cylinder and an adapter rod. The first cylinder is connected to the upper part of a corresponding bracket, and the first cylinders on the two brackets are arranged opposite to each other. One end of the adapter rod is rotatably connected to the cylinder rod of the first cylinder, and the other end is rotatably connected to the upper end of the upper gripper. The adapter rod, acting as a connector between the first cylinder and the upper gripper, ensures that the upper gripper can have a larger rotation angle.

[0009] In an improved embodiment, the second drive element includes a second cylinder connected to the lower part of a corresponding bracket, with the second cylinders on the two brackets arranged opposite to each other.

[0010] In an improved embodiment, the clamping assembly further includes a limiting post connected to the bracket. The limiting post is vertically arranged and located between the upper limiting block and the lower limiting block. The limiting post has a limiting surface for fitting against the side of the workpiece, thereby achieving abutment and limiting of the side of the semi-cylindrical structure through the limiting post.

[0011] In an improved embodiment, the upper and lower parts of the limiting surface are provided with protruding limiting pins, which correspond to the process holes on the semi-cylindrical structure. Thus, when the semi-cylindrical structure is placed on the bracket, the limiting pins can enter the process holes of the semi-cylindrical structure, further improving the positional accuracy of the semi-cylindrical structure.

[0012] In an improved embodiment, the upper limit block is U-shaped, and the U-shaped openings of the upper limit blocks of the two supports face each other; the lower limit block is U-shaped, and the U-shaped openings of the lower limit blocks of the two supports face each other, thereby enabling the upper and lower limit blocks to fit better into the semi-cylindrical structure, with a larger contact surface, making the semi-cylindrical structure more stable after being clamped.

[0013] In an improved embodiment, the linear drive includes a guide rail and a third cylinder. The guide rail is arranged laterally on the base. One of the two brackets is fixedly connected to the base and the other is slidably connected to the guide rail. The third cylinder is connected to the base and its cylinder rod is connected to the bracket on the guide rail. This improves the stability of the bracket during movement through the guide rail, resulting in a simple and reliable structure. Attached Figure Description

[0014] Figure 1 A schematic diagram of an energy-absorbing box welding fixture;

[0015] Figure 2 This is a top view schematic diagram of a welding fixture for an energy-absorbing box;

[0016] Figure 3 For along Figure 2 Schematic diagram of the sectional view along section AA.

[0017] Explanation of reference numerals in the attached figures.

[0018] 1. Base; 2. Bracket; 21a. First cylinder; 21b. Adapter rod; 22. Second cylinder; 3. Linear drive component; 31. Guide rail; 32. Third cylinder; 41. Upper gripper; 41a. Rotating shaft; 42. Lower gripper; 43. Upper limit block; 44. Lower limit block; 45. Limiting post; 45a. Limiting surface; 45b. Limiting pin. Detailed Implementation

[0019] It should be understood by those skilled in the art that the following embodiments are merely illustrative of the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0020] In the following description of the embodiments, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0021] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] Please see Figures 1-3 An embodiment of this utility model provides an energy-absorbing box welding fixture, including a base 1, on which a linear drive 3 and two supports 2 are provided. The linear drive 3 acts on at least one support 2 to make the two supports 2 move closer or further apart.

[0024] Each of the two supports 2 has a clamping assembly on its opposite side. The clamping assembly includes an upper jaw 41, a lower jaw 42, an upper limit block 43, and a lower limit block 44. The upper limit block 43 and the lower limit block 44 are respectively connected to the upper and lower parts of the support 2. The middle part of the upper jaw 41 is rotatably connected to the upper part of the support 2 via a rotating shaft 41a, and the rotating shaft 41a is located above the upper limit block 43. The upper part of the support 2 is provided with a first driving member, which acts on the upper end of the upper jaw 41 and drives the upper jaw 41 to rotate around the rotating shaft 41a, so that the lower end of the upper jaw 41 moves closer to or away from the upper limit block 43. The lower part of the support 2 is provided with a second driving member, which drives the lower jaw 42 to move in a direction parallel to the linear driving member 3, so that the lower jaw 42 moves closer to or away from the lower limit block 44.

[0025] The above solution uses two supports 2. The upper gripper 41, in conjunction with the upper limit block 43, clamps and limits the upper part of the semi-cylindrical structure, while the lower gripper 42, in conjunction with the lower limit block 44, clamps and limits the lower part. After the two supports 2 have clamped the semi-cylindrical structure using the clamping components, the linear drive 3 moves the two supports 2 closer together, allowing the two semi-cylindrical structures to align and be welded. After welding, the first drive component rotates the upper gripper 41 around the pivot 41a, causing the lower end of the upper gripper 41 to move obliquely upwards and disengage from the top of the cylindrical structure. Simultaneously, the second drive component moves the lower gripper 42 away from the lower limit block 44, allowing the welded cylindrical structure to be easily removed. Compared to existing technologies, this solution effectively fixes the two semi-cylindrical structures using two supports 2 combined with clamping components, ensuring their position is fixed during subsequent welding, guaranteeing welding quality. Furthermore, the cylindrical structure can be easily removed from between the two supports 2 after welding, making the operation simple and convenient.

[0026] To make the explanation clearer, Figure 1 Based on this, two supports 2 are arranged along the front-to-back direction on the base 1, and the linear drive 3 is also arranged along the front-to-back direction. In this embodiment, the linear drive 3 includes a guide rail 31 arranged in the front-to-back direction and a third cylinder 32. The guide rail 31 is arranged laterally on the base 1. Of the two supports 2, the support 2 located on the front side is fixedly connected to the base 1, and the support 2 located on the rear side is slidably connected to the guide rail 31. The third cylinder 32 is connected to the base 1, and its cylinder rod is connected to the support 2 on the guide rail 31, thereby driving the rear support 2 to slide back and forth along the guide rail 31. The structure is simple and reliable. Of course, the linear drive 3 can also be other common forms such as a lead screw motor pair, which is not limited in this design.

[0027] In this embodiment, the first driving component includes a first cylinder 21a and an adapter rod 21b. The first cylinder 21a is connected to the upper part of the corresponding bracket 2, and the first cylinders 21a on the two brackets 2 are arranged opposite to each other. One end of the adapter rod 21b is rotatably connected to the cylinder rod of the first cylinder 21a, and the other end is rotatably connected to the upper end of the upper gripper 41. The adapter rod 21b serves as a connector between the first cylinder 21a and the upper gripper 41, ensuring that the upper gripper 41 can have a larger rotation angle.

[0028] In this embodiment, the second driving component includes a second cylinder 22, which is connected to the lower part of the corresponding bracket 2 and the second cylinders 22 on the two brackets 2 are arranged opposite to each other.

[0029] As an improvement to this embodiment, the clamping assembly also includes a limiting post 45 connected to the bracket 2. The limiting post 45 is arranged vertically and located between the upper limiting block 43 and the lower limiting block 44. The limiting post 45 is provided with a limiting surface 45a for fitting against the side of the workpiece, thereby achieving the abutment and limiting of the side of the semi-cylindrical structure through the limiting post 45.

[0030] Furthermore, the upper and lower parts of the limiting surface 45a are provided with protruding limiting pins 45b, which correspond to the process holes on the semi-cylindrical structure. Thus, when the semi-cylindrical structure is placed on the bracket 2, the limiting pins 45b can enter the process holes of the semi-cylindrical structure, further improving the positional accuracy of the semi-cylindrical structure.

[0031] In this embodiment, the upper limit block 43 is U-shaped, and the U-shaped openings of the upper limit blocks 43 of the two supports 2 are opposite to each other; the lower limit block 44 is U-shaped, and the U-shaped openings of the lower limit blocks 44 of the two supports 2 are opposite to each other, so that the upper limit block 43 and the lower limit block 44 can fit better into the semi-cylindrical structure, the contact surface is larger, and the semi-cylindrical structure is more stable after being clamped.

[0032] It should be noted that in the description of this application, the terms "inner" and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application. All directional indications (such as up, down, left, right, front, back, inner, and outer) are only used to explain the relative positional relationships and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0033] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the 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 a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0034] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A welding fixture for an energy-absorbing box, comprising a base (1), characterized in that, The base (1) is provided with a linear drive (3) and two supports (2). The linear drive (3) acts on at least one support (2) to make the two supports (2) move closer or further apart from each other. Each of the two supports (2) has a clamping assembly on its opposite side. The clamping assembly includes an upper jaw (41), a lower jaw (42), an upper limit block (43), and a lower limit block (44). The upper limit block (43) and the lower limit block (44) are respectively connected to the upper and lower parts of the support (2). The middle part of the upper jaw (41) is rotatably connected to the upper part of the support (2) via a rotating shaft (41a), and the rotating shaft (41a) is located above the upper limit block (43). The upper part of the bracket (2) is provided with a first driving member, which acts on the upper end of the upper jaw (41) and drives the upper jaw (41) to rotate around the shaft (41a) so that the lower end of the upper jaw (41) approaches or moves away from the upper limit block (43); the lower part of the bracket (2) is provided with a second driving member, which is used to drive the lower jaw (42) to move in a direction parallel to the linear driving member (3) so that the lower jaw (42) approaches or moves away from the lower limit block (44).

2. The energy-absorbing box welding fixture according to claim 1, characterized in that, The first driving component includes a first cylinder (21a) and an adapter rod (21b). The first cylinder (21a) is connected to the upper part of the corresponding bracket (2) and the first cylinders (21a) on the two brackets (2) are arranged opposite to each other. One end of the adapter rod (21b) is rotatably connected to the cylinder rod of the first cylinder (21a) and the other end is rotatably connected to the upper end of the upper jaw (41).

3. The energy-absorbing box welding fixture according to claim 1, characterized in that, The second drive unit includes a second cylinder (22), which is connected to the lower part of the corresponding bracket (2) and the second cylinders (22) on the two brackets (2) are arranged opposite to each other.

4. The energy-absorbing box welding fixture according to any one of claims 1-3, characterized in that, The clamping assembly also includes a limiting post (45) connected to the bracket (2). The limiting post (45) is arranged vertically and located between the upper limiting block (43) and the lower limiting block (44). The limiting post (45) is provided with a limiting surface (45a) for fitting to the side of the workpiece.

5. The energy-absorbing box welding fixture according to claim 4, characterized in that, The upper and lower parts of the limiting surface (45a) are provided with protruding limiting pins (45b).

6. The energy-absorbing box welding fixture according to claim 1, characterized in that, The upper limit block (43) is U-shaped, and the U-shaped openings of the upper limit blocks (43) of the two supports (2) are opposite to each other; the lower limit block (44) is U-shaped, and the U-shaped openings of the lower limit blocks (44) of the two supports (2) are opposite to each other.

7. The energy-absorbing box welding fixture according to claim 1, characterized in that, The linear drive (3) includes a guide rail (31) and a third cylinder (32). The guide rail (31) is arranged laterally on the base (1). One of the two brackets (2) is fixedly connected to the base (1) and the other is slidably connected to the guide rail (31). The third cylinder (32) is connected to the base (1) and the cylinder rod is connected to the bracket (2) on the guide rail (31).

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