Self-locking welding fixture

Abstract

The utility model belongs to the technical field of clamps, and relates to a self-locking welding clamp which comprises a connecting plate and a limiting block arranged on the connecting plate, a floating block which is driven by a thin air cylinder and can float up and down is arranged behind the limiting block, L-shaped plates are arranged on the two sides of the limiting block, and the L-shaped plates are arranged on the two sides of the limiting block. The bottoms of the vertical parts of the L-shaped plates are rotatably connected to the limiting blocks through pin shafts, a pressing arm is fixed between the horizontal parts of the two L-shaped plates, the end of the pressing arm is connected with a pressing block, the tops of the outer walls of the vertical parts of the L-shaped plates are connected with one ends of springs, and the other ends of the springs are connected to the connecting plates. The spring is in a stretched state, a rolling wheel is connected between the corners of the two L-shaped plates, an inclined face is arranged on the side, close to the rolling wheel, of the top of the floating block, and the rolling wheel abuts against the inclined face. The welding clamp is driven by the thin air cylinder, the overall specification is reduced, and therefore the welding clamp is suitable for some narrow working environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of clamp, especially a kind of self-locking welding fixture. BACKGROUND

[0002] With the fast development of industrial automation, adapt to the changing market demand, the demand of current welding industry for tool positioning and automation degree is also higher and higher, and the quality of workpiece welding is particularly important for the quality structure of entire product, and is an important process for measuring product quality.In the production process of new energy automobile battery box, positioning and clamping device is often needed during welding due to large workpiece volume, and the existing clamp is mostly driven by cylinder to vertically press down, in order to facilitate the feeding and discharging of workpiece, the cylinder is often needed to be lifted to a higher position, which makes the specification of cylinder larger, and cannot adapt to some narrow working environment, therefore, the utility model provides a kind of self-locking welding fixture. SUMMARY

[0003] The main purpose of the utility model is to provide a kind of self-locking welding fixture, the welding fixture adopts thin cylinder as drive, reduces the overall specification, to adapt to some narrow working environment;The thin cylinder drives the floating block to reset, the L-shaped plate rotates counterclockwise outward under the action of spring tension, and the pressing block is moved out from directly above the pressing point, so that the product can be easily removed.

[0004] The utility model discloses a kind of self-locking welding fixtures, including connecting plate, be located on the connecting plate Limiting block, the rear of the limiting block is equipped with the floating block that can be up and down floating by thin cylinder drive, the two sides of the limiting block are equipped with L-shaped plate, the bottom of the vertical portion of the L-shaped plate is rotatably connected on the limiting block by pin shaft, the horizontal portion between two L-shaped plates is fixed with pressing arm, the end of the pressing arm is connected with pressing block, the top of the vertical portion outer wall of the L-shaped plate is connected with one end of spring, the other end of the spring is connected on the connecting plate, the spring is in tension state, connecting roller is connected between the corner of two L-shaped plates, the side of the floating block top close to the roller is equipped with inclined plane, the roller is rested on the inclined plane.

[0005] Preferably, T-shaped block is provided on the connecting plate, and the floating block is located between the limiting block and the T-shaped block.

[0006] Preferably, the upper end surface of the limiting block is lower than the upper end surface of the T-shaped block, and a limiting column is provided on the upper end surface of the limiting block.

[0007] Preferably, the lower end surface of the connecting plate is provided with a fixed support.

[0008] The beneficial effects of the technical solution of this utility model are:

[0009] The welding fixture adopts a thin cylinder as a drive, which reduces the overall specifications and thus adapts to some narrow working environments;

[0010] When the product needs to be taken out, the thin cylinder drives the floating block to reset, and the L-shaped plate rotates counterclockwise outward under the tension of the spring, moving the pressing block out from just above the pressing point, thereby facilitating the removal of the product and solving the problem in the prior art that the pressing block is lifted vertically and the product is difficult to take out. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 Schematic diagram of the structure of the self-locking welding fixture in the released state according to an embodiment.

[0012] Figure 2 This is a schematic diagram of the clamping state structure of the self-locking welding fixture.

[0013] The numbers in the figure represent:

[0014] 1. Connecting plate; 2. Limit block; 3. Thin cylinder; 4. Floating block; 5. L-shaped plate; 6. Pressure arm; 7. Pressure block; 8. Spring; 9. Roller; 10. Inclined surface; 11. T-shaped block; 12. Limit column; 13. Fixed support; 14. Buffer gasket. DETAILED DESCRIPTION

[0015] The present invention will be further described in detail below with reference to specific embodiments.

[0016] Example:

[0017] like Figure 1 and Figure 2 As shown, a self-locking welding fixture of the present invention includes a connecting plate 1, a limit block 2 provided on the connecting plate 1, a floating block 4 that can float up and down and is driven by a thin cylinder 3 is provided behind the limit block 2, L-shaped plates 5 are provided on both sides of the limit block 2, the bottom of the vertical part of the L-shaped plate 5 is rotatably connected to the limit block 2 through a pin, a pressure arm 6 is fixed between the horizontal parts of the two L-shaped plates 5, the end of the pressure arm 6 is connected to a pressure block 7, a buffer gasket 14 is connected between the pressure block 7 and the pressure arm 6, one end of the spring 8 is connected to the top of the outer wall of the vertical part of the L-shaped plate 5, the other end of the spring 8 is connected to the mounting plate, and the spring 8 is in a stretched state, a roller 9 is connected between the corners of the two L-shaped plates 5, and a slope 10 is provided on the side of the top of the floating block 4 close to the roller 9, and the roller 9 rests on the slope 10.

[0018] The connecting plate 1 is provided with a T-shaped block 11 , and the floating block 4 is located between the limiting block 2 and the T-shaped block 11 .

[0019] The upper end surface of the limit block 2 is lower than the upper end surface of the T-block 11. A limit column 12 is provided on the upper end surface of the limit block 2 to limit the rotation angle of the L-shaped plate 5, thereby limiting the downward pressing stroke of the pressing block 7 to prevent the product from being crushed.

[0020] The lower end surface of the connecting plate 1 is provided with a fixing support 13, so as to facilitate fixing the clamp on the bracket.

[0021] The beneficial effects of the present invention are as follows: the welding fixture adopts a thin cylinder 3 as a drive, which reduces the overall specifications and adapts to some narrow working environments. In the initial state, the fixture is in an open state, the roller 9 is against the inclined surface 10, and the pressure arm 6 is tilted upward. When the product needs to be pressed, the thin cylinder 3 drives the floating block 4 upward and then pushes the L-shaped plate 5 to rotate clockwise. The roller 9 rolls down along the inclined surface 10 until the roller 9 is against the vertical surface of the floating block 4, so the pressure arm 6 turns to a horizontal state and presses the product through the pressure block 7. The floating block 4 continues to move upward, and the pressure arm 6 maintains a clamping state, thereby achieving a self-locking effect. When the product needs to be removed, the thin cylinder 3 drives the floating block 4 to reset, and the L-shaped plate 5 rotates counterclockwise outward under the tension of the spring 8, thereby facilitating the removal of the product.

[0022] The above descriptions are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A self-locking welding fixture, arranged around the welding station, characterized by: The cam is secured to the rear of the two L-shaped plates and has an L-shaped bottom edge, the L-shaped bottom edge being rotatably connected to the cam by a pin. A pressure arm is fixed between the horizontal portions of the two L-shaped plates, and a pressure block is connected to the end of the pressure arm. One end of a spring is connected to the top of the outer wall of the vertical portion of the L-shaped plate, and the other end of the spring is connected to the connecting plate. The spring is in a stretched state, and a roller is connected between the corners of the two L-shaped plates. A slope is provided on the side of the top of the floating block close to the roller, and the roller rests on the slope.

2. The self-locking welding fixture according to claim 1, characterized in that: A T-shaped block is provided on the connecting plate, and the floating block is located between the limiting block and the T-shaped block.

3. The self-locking welding fixture according to claim 2, characterized in that: The upper end surface of the limiting block is lower than the upper end surface of the T-shaped block, and a limiting column is provided on the upper end surface of the limiting block.

4. The self-locking welding fixture according to claim 1, characterized in that: The lower end surface of the connecting plate is provided with a fixed support.

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