Engineering vehicle counterweight box body welding positioning clamp

Abstract

An engineering vehicle counterweight box body welding positioning clamp comprises a supporting seat, mounting flanges are arranged at the two ends of the supporting seat, telescopic clamping assemblies are arranged on the two sides of the supporting seat, and a magnetic block used for attracting a counterweight box body is further arranged on the portion, between the telescopic clamping assemblies, of the supporting seat. The telescopic clamping assembly comprises a first trapezoidal lead screw and a second trapezoidal lead screw which are driven by a gear motor through a coupler, positioning backers are arranged on fixed supporting seats of the first trapezoidal lead screw and the second trapezoidal lead screw, and downward pressing air cylinders are arranged on the positioning backers. Positioning slide carriages are arranged on movable supporting seats of the first trapezoidal lead screw and the second trapezoidal lead screw, and elastic pressing blocks are arranged on the inner sides of the positioning slide carriages. The counterweight box body is automatically positioned and clamped through the telescopic clamping assemblies arranged on the two sides of the supporting seat, the pressing air cylinder is further fixed, the magnetic blocks are arranged on the supporting seat, and the counterweight box body is attracted by opening the magnetic blocks to fix the position of the counterweight box body.

Description

TECHNICAL FIELD

[0001] The utility model relates to tool fixture technical field especially relates to a kind of engineering vehicle counterweight box body welding positioning fixture. BACKGROUND

[0002] The welding of engineering vehicle counterweight box body directly affects the overall structural strength and safety of use of excavator.The traditional counterweight box positioning fixture is manually positioned by screw rod tightening, positioning pin or positioning plate as the reference, which has low operation efficiency, non-uniform welding seam quality, cannot meet the compatibility of various workpiece models, cannot realize man-machine cooperation, indirectly increases the labor intensity, the number of various workpiece models of manual welding fixture is numerous, the space utilization rate of workshop is reduced, and the fixture cannot be clamped simultaneously, which affects production efficiency.Therefore, we design a kind of engineering vehicle counterweight box body welding positioning fixture, which is used for the fixing fixture of counterweight box shell production welding, improves production efficiency, makes positioning more accurate, and does not need manual tool changing, has strong compatibility, is simple and convenient and saves manpower. SUMMARY

[0003] The utility model aims at providing a kind of engineering vehicle counterweight box body welding positioning fixture, which can be automatically clamped and fixed during counterweight box shell production welding, to realize automatic production.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] The utility model provides a kind of engineering vehicle counterweight box body welding positioning fixture, including the support seat of the installation flange being provided at both ends, the both sides of support seat are provided with telescopic clamping assembly, the support seat between telescopic clamping assembly is also provided with the magnetic block for adsorbing the counterweight box, telescopic clamping assembly includes the first trapezoidal lead screw and second trapezoidal lead screw driven by speed reducer through shaft coupling, the fixed support of first trapezoidal lead screw and second trapezoidal lead screw is provided with positioning backstop, the positioning backstop is provided with the down pressure cylinder, the movable support of first trapezoidal lead screw and second trapezoidal lead screw is provided with positioning slide plate, the inner side of positioning slide plate is provided with elastic compression block.

[0006] Further, the support seat is composed of three cross bars, three magnetic blocks are equidistantly arranged on each cross bar, and a floating support block is arranged between every two magnetic blocks.

[0007] Further, the cross bar is provided with a lifting ring.

[0008] Further, the support seat further includes a first short rod and a second short rod connected with the outer cross bar, and the first short rod and the second short rod are both provided with the magnetic block.

[0009] Furthermore, the elastic clamping block includes a spring and a clamping block, the clamping block being fixed to the positioning slide by the spring.

[0010] Furthermore, the cross-section of the positioning support is h-shaped, the extension of the positioning support away from the opening is fixed on the fixed support base, the pressing cylinder is disposed on the surface above the opening, and the movable end of the pressing cylinder extends into the opening.

[0011] The beneficial effects of this utility model are as follows: The counterweight box is automatically positioned and clamped by the retractable clamping components set on both sides of the support base, and the downward pressing cylinder further fixes it. In addition, the support base is equipped with magnetic blocks. By opening the magnetic blocks, the counterweight box is attracted and its position is fixed. While ensuring product production efficiency, the product welding quality and work efficiency are improved. It is compatible with a variety of products, realizes automated production lines, ensures the safety of manual operation, and improves the reliability of product quality. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 .

[0013] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 .

[0014] Figure 3 This is a top view of the present invention.

[0015] Figure 4 This is a bottom view of the present invention.

[0016] In the diagram, 1-mounting flange, 2-support base, 3-magnetic block, 4-gear motor, 5-coupling, 6-first trapezoidal lead screw, 7-second trapezoidal lead screw, 8-fixed support base, 9-positioning backrest, 10-downward cylinder, 11-movable support base, 12-positioning slide, 13-elastic clamping block, 131-spring, 132-clamping block, 14-floating support block, 15-lifting ring, 16-first short rod, 17-second short rod, 18-second gear motor, 19-coupling, 20-third trapezoidal lead screw. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Please see Figures 1 to 4 This utility model provides an embodiment:

[0019] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4A welding positioning fixture for a counterweight box of an engineering vehicle includes a support base 2 with mounting flanges 1 at both ends. Retractable clamping assemblies are provided on both sides of the support base 2. A magnetic block 3 for adsorbing the counterweight box is also provided on the support base 2 between the retractable clamping assemblies. The retractable clamping assemblies include a first trapezoidal screw 6 and a second trapezoidal screw 7 driven by a geared motor 4 via a coupling 5. A positioning backing 9 is provided on a fixed support base 8 of the first trapezoidal screw 6 and the second trapezoidal screw 7. A pressing cylinder 10 is provided on the positioning backing 9. A positioning slide 12 is provided on a movable support base 11 of the first trapezoidal screw 6 and the second trapezoidal screw 7. An elastic pressing block 13 is provided on the inner side of the positioning slide 12. The mounting flanges 1 are mounted on a positioner and can be disassembled as needed. A third trapezoidal screw 20 driven by a second geared motor 18 via a second coupling 19 is provided at the bottom of the support base 2 to push the positioning backing 9 to clamp the counterweight box.

[0020] Please see Figure 1 The support base 2 consists of three crossbars, each with three magnetic blocks 3 evenly spaced. Floating support blocks 14 are positioned between each pair of magnetic blocks. The workpiece is placed on the floating support blocks 14 for auxiliary support.

[0021] Please see Figure 1 The crossbar is equipped with lifting rings 15. Movement is achieved by lifting using the lifting rings 15.

[0022] Please see Figure 1 The support base 2 also includes a first short rod 16 and a second short rod 17 connected to the outer crossbar, and both the first short rod 16 and the second short rod 17 are provided with magnetic blocks 3.

[0023] Please see Figure 2 The elastic clamping block 13 includes a spring 131 and a clamping block 132, with the clamping block 132 fixed to the positioning slide plate 12 by the spring 131. The elastic clamping block 13 has a certain elasticity when clamping the workpiece, protecting the clamped workpiece from damage.

[0024] Please see Figure 1 The positioning support 9 has an H-shaped cross-section. The extension of the positioning support 9 away from the opening is fixed to the fixed support 8. The pressing cylinder 10 is set on the surface above the opening, and the movable end of the pressing cylinder 10 extends into the opening. When the workpiece is located in the opening, the movable end of the pressing cylinder 10 presses down on the workpiece and fixes its position.

[0025] Working principle: The RGV trolley places the assembled counterweight shell on the support base 2. The second reduction motor 18 at the bottom of the support base 2 drives the third trapezoidal screw 20 through the second coupling 19 to push the positioning backrest 9 to clamp the counterweight shell. Then, the reduction motor 4 drives the first trapezoidal screw 6 and the second trapezoidal screw 7 through the coupling 5, so that the positioning slide 12 drives the elastic clamping block 13 to clamp the workpiece. The pressing cylinder 10 is activated, and the movable end of the pressing cylinder 10 extends into the opening to press down the workpiece and fix its position. The magnetic block 3 on the support base 2 is opened, and the magnetic block 3 attracts the workpiece. The position of the workpiece is fixed, and it can then cooperate with the robot for welding.

Claims

1. An engineered vehicle counterweight box welding fixture, characterized by: The support seat is provided with mounting flanges at both ends, both sides of the support seat are provided with telescopic clamping assemblies, magnetic blocks for adsorbing the counterweight box are arranged on the support seat between the telescopic clamping assemblies, the telescopic clamping assemblies comprise first and second trapezoidal lead screws driven by a reduction motor through a shaft coupling, positioning abutments are arranged on the fixed support seat of the first and second trapezoidal lead screws, a pressing cylinder is arranged on the positioning abutments, positioning slides are arranged on the movable support seat of the first and second trapezoidal lead screws, and elastic pressing blocks are arranged on the inner side of the positioning slides.

2. An engineered vehicle counterweight box welding fixture as claimed in claim 1, wherein: The support seat is composed of three cross bars, three magnetic blocks are arranged at equal distances on each cross bar, and floating support blocks are arranged between every two magnetic blocks.

3. An engineered vehicle counterweight box welding fixture as claimed in claim 2, wherein: Lifting rings are arranged on the cross bars.

4. The engineered vehicle ballast box welding fixture of claim 2, wherein: The support seat further comprises first and second short bars connected with the outer cross bars, and the first and second short bars are both provided with the magnetic blocks.

5. The engineered vehicle ballast box welding fixture of claim 1, wherein: The elastic pressing blocks comprise springs and pressing blocks, and the pressing blocks are fixed on the positioning slides through the springs.

6. The engineered vehicle ballast box welding fixture of claim 1, wherein: The positioning abutments have an h-shaped cross section, the extension parts of the positioning abutments away from the opening sides are fixed on the fixed support seat, the pressing cylinder is arranged on the surface above the opening, and the movable end of the pressing cylinder extends into the opening.

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