Electric vehicle frame welding positioning tool

Abstract

This utility model discloses a welding and positioning fixture for an electric vehicle frame, including a mounting base. The mounting base is provided with a fixed clamping assembly and a movable clamping assembly. The fixed clamping assembly includes a mounting plate fixedly connected to the mounting base, and a fixed gripper is fixedly provided at the upper end of the mounting plate. The movable clamping assembly includes a movable seat and a first drive mechanism for driving the movable seat to move closer to or away from the fixed clamping assembly. The movable seat is provided with a movable gripper. The mounting base is connected to a second drive mechanism for driving the mounting seat to move along a plane parallel to the plane in which the movable seat moves. The fixed gripper of the fixed clamping assembly directly serves as a positioning reference, and its clamping surface is precisely adapted to the positioning part of the frame. Positioning is completed synchronously during clamping without additional positioning steps. Compared with traditional fixtures, the positioning time saved significantly improves production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of automobile and electric vehicle manufacturing technology, and in particular to a welding and positioning fixture for electric vehicle frames. Background Technology

[0002] In the welding process of electric vehicle frames, the stability and positioning accuracy of the positioning fixture directly determine the welding quality of key connection parts of the frame (such as the battery frame and motor mount). Traditional welding fixtures generally adopt a double-sided synchronous clamping structure, that is, both sides of the clamps move towards the center simultaneously through a drive mechanism to clamp the frame. This solution has the following technical defects:

[0003] Lack of positioning reference: The frame is placed directly between the two grippers without a fixed positioning reference. During the clamping process, the frame is prone to three-dimensional displacement (such as lateral sliding or longitudinal tilting) due to uneven force applied by the grippers, asynchronous drive, or deviation in the initial placement position. This results in deviations between the welding position and the design drawings, requiring repeated manual calibration, which leads to low production efficiency.

[0004] Clamping interference risk: When the clamps on both sides apply force simultaneously, if the initial position of the frame deviates from the tooling center, the opposing thrust of the clamps may cause irreversible plastic deformation to the weak parts of the frame (such as thin-walled tubing). Especially in the high temperature environment of welding, the risk of deformation is further aggravated, affecting the structural strength of the frame.

[0005] Multi-step positioning is cumbersome: Traditional tooling requires the frame to be positioned first using independent positioning pins or positioning blocks, and then the grippers are activated to hold it. The positioning and clamping processes are separated, which not only increases the complexity of the tooling, but may also cause the frame to shift twice during the "positioning-clamping" process due to the inconsistency between the reference of the positioning element and the clamping element. Utility Model Content

[0006] Purpose of the invention: The purpose of this utility model is to provide a welding and positioning fixture for electric vehicle frames. The fixing claws of the fixing clamping component directly serve as the positioning reference, and their clamping surfaces are precisely matched with the positioning part of the frame. Positioning is completed simultaneously during clamping without the need for additional positioning steps. Compared with traditional fixtures, the positioning time saved significantly improves production efficiency.

[0007] Technical solution:

[0008] A welding and positioning fixture for an electric vehicle frame includes a mounting base, on which a fixed clamping component and a movable clamping component are provided;

[0009] The fixed clamping assembly includes a fixed mounting plate fixedly connected to the mounting base, and the upper end of the fixed mounting plate is provided with positioning claws for simultaneously clamping and positioning one side of the frame;

[0010] The movable clamping assembly includes a movable seat and a first drive mechanism that drives the movable seat to move closer to or away from the fixed clamping assembly. The movable seat is provided with movable grippers for clamping the other side of the vehicle frame.

[0011] The fixed clamping assembly and the movable clamping assembly are mounted together on the mounting base, which is connected to a second drive mechanism for controlling their movement.

[0012] Furthermore, the first drive mechanism includes a servo motor and a lead screw, the lead screw being connected to the output shaft of the servo motor, and the movable seat being threadedly engaged with the lead screw; the mounting base is provided with a guide rail parallel to the lead screw, and the movable seat is slidably connected to the guide rail via a sliding groove.

[0013] Furthermore, the clamping surfaces of both the positioning gripper and the moving gripper are provided with a rubber buffer layer with anti-slip texture.

[0014] Furthermore, the second driving mechanism is a hydraulic cylinder, and the mounting base is fixed to the output end of the hydraulic cylinder.

[0015] Furthermore, the fixed mounting plate and the mounting base are connected by bolts.

[0016] Furthermore, the mounting base is provided with multiple sets of bolt holes.

[0017] Furthermore, a welding workbench is provided at the upper middle of the mounting base, and a laser rangefinder sensor is provided on the movable base facing the workbench.

[0018] Furthermore, both ends of the lead screw are mounted on the mounting base via shock-absorbing bearing seats, and rubber shock-absorbing pads are provided between the bearing seats and the mounting base.

[0019] Beneficial effects: The fixing jaws of the fixing clamping component directly serve as the positioning reference, and their clamping surfaces are precisely matched with the positioning part of the frame. Positioning is completed simultaneously during clamping without additional positioning steps. Compared with traditional tooling, the positioning time saved significantly improves production efficiency. The mounting plate and the mounting base are connected by bolts, and the mounting base has multiple sets of bolt holes, which can flexibly adjust the position of the fixing clamping component to adapt to the size differences of different frame models. Attached Figure Description

[0020] Figure 1 This is a three-dimensional representation of the present invention. Figure 1 ;

[0021] Figure 2 This is a three-dimensional representation of the present invention. Figure 2 ;

[0022] Figure 3 This is an enlarged view of the position of the first driving mechanism of this utility model;

[0023] Figure 4This is an enlarged schematic diagram of the mounting plate position of this utility model. Detailed Implementation

[0024] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Example 1

[0026] like Figure 1-4 As shown, an electric vehicle frame welding positioning fixture includes a mounting base 1, on which a fixed clamping component 2 and a movable clamping component 3 are provided;

[0027] The fixed clamping assembly 2 includes a fixed mounting plate 21 fixedly connected to the mounting base 1. The fixed mounting plate 21 is provided with a positioning claw 22 at its upper end, which is used to simultaneously clamp and position one side of the frame.

[0028] The movable clamping assembly 3 includes a movable base 31 and a first drive mechanism 32 that drives the movable base 31 to move closer to or away from the fixed clamping assembly 2. The movable base 31 is provided with a movable gripper 33 for clamping the other side of the vehicle frame.

[0029] The fixed clamping assembly 2 and the movable clamping assembly 3 are jointly mounted on the mounting base 1, and the mounting base 1 is connected to a second drive mechanism 4 that controls their movement.

[0030] Furthermore, the first drive mechanism 32 includes a servo motor 321 and a lead screw 322. The lead screw 322 is connected to the output shaft of the servo motor 321, and the movable seat 31 is threadedly engaged with the lead screw 322. The mounting base 1 is provided with a guide rail 11 parallel to the lead screw 322, and the movable seat 31 is slidably connected to the guide rail 11 through a sliding groove 311.

[0031] Furthermore, the clamping surfaces of the positioning gripper 22 and the moving gripper 33 are both provided with a rubber buffer layer 223 with anti-slip texture.

[0032] Furthermore, the second drive mechanism 4 is a hydraulic cylinder, and the mounting base 1 is fixed to the output end of the hydraulic cylinder.

[0033] Furthermore, the fixed mounting plate 21 is connected to the mounting base 1 by bolts.

[0034] Furthermore, the mounting base 1 is provided with multiple sets of bolt holes 12.

[0035] Furthermore, a welding workbench 13 is provided at the upper middle of the mounting base 1, and a laser rangefinder sensor 5 is provided on the movable base facing the workbench.

[0036] Furthermore, the two ends of the lead screw 322 are mounted on the mounting base 1 through the shock-absorbing bearing seats 324, and a rubber shock-absorbing pad 325 is provided between the bearing seats 324 and the mounting base 1.

[0037] Working principle: The frame 100 is placed on the welding workbench 13, and one side of the frame is pressed against the fixed gripper 22 to complete the coarse positioning; the first drive mechanism 32 is started, the servo motor 321 drives the lead screw 322 to rotate, and drives the moving seat 31 to move along the guide rail 11 towards the fixed gripper 22 until the moving gripper 33 contacts the other side of the frame and applies the set clamping force to complete the frame clamping; the second drive mechanism 4 drives the mounting seat 1 to move as a whole until the center of the frame coincides with the path of the welding robot; the welding robot performs the welding operation.

[0038] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A welding and positioning fixture for an electric vehicle frame, characterized in that, It includes a mounting base (1), on which a fixed clamping assembly (2) and a movable clamping assembly (3) are provided; The fixed clamping assembly (2) includes a fixed mounting plate (21) fixedly connected to the mounting base (1). The fixed mounting plate (21) is provided with a positioning claw (22) at its upper end, which is used to simultaneously clamp and position one side of the frame. The movable clamping assembly (3) includes a movable seat (31) and a first drive mechanism (32) that drives the movable seat (31) to approach or move away from the fixed clamping assembly (2). The movable seat (31) is provided with a movable gripper (33) for clamping the other side of the frame. The fixed clamping assembly (2) and the movable clamping assembly (3) are mounted together on the mounting base (1), which is connected to a second drive mechanism (4) for controlling its movement.

2. The electric vehicle frame welding positioning fixture according to claim 1, characterized in that, The first drive mechanism (32) includes a servo motor (321) and a lead screw (322). The lead screw (322) is connected to the output shaft of the servo motor (321), and the moving seat (31) is threadedly engaged with the lead screw (322). The mounting base (1) is provided with a guide rail (11) parallel to the lead screw (322), and the moving seat (31) is slidably connected to the guide rail (11) through a sliding groove (311).

3. The electric vehicle frame welding positioning fixture according to claim 1, characterized in that, The clamping surfaces of the positioning gripper (22) and the moving gripper (33) are provided with a rubber buffer layer (223) with anti-slip texture.

4. The electric vehicle frame welding positioning fixture according to claim 1, characterized in that, The second driving mechanism is a hydraulic cylinder, and the mounting base (1) is fixed to the output end of the hydraulic cylinder.

5. The electric vehicle frame welding positioning fixture according to claim 1, characterized in that, The fixed mounting plate (21) and the mounting base (1) are connected by bolts.

6. The electric vehicle frame welding positioning fixture according to claim 1, characterized in that, The mounting base (1) is provided with multiple sets of bolt holes (12) for installing and adjusting the mounting plate (21).

7. The electric vehicle frame welding positioning fixture according to claim 1, characterized in that, A welding workbench (13) is provided at the middle of the upper end of the mounting base (1), and a laser rangefinder sensor is provided on the movable base facing the workbench.

8. The electric vehicle frame welding positioning fixture according to claim 2, characterized in that, The two ends of the lead screw (322) are mounted on the mounting base (1) through the shock-absorbing bearing seats (324), and a rubber shock-absorbing pad (325) is provided between the bearing seats (324) and the mounting base (1).

Images