Scissor arm welding clamp

Abstract

The utility model relates to a scissor arm welding fixture, which comprises a fixture bottom plate, a plurality of groups of limiting structures arranged on the fixture bottom plate along the arm length direction of a scissor arm, a fixed-point press-fitting structure, an annular pressing structure and a clamping press-fitting structure, the fixed-point press-fitting structure comprises a fixed-point cushion block positioned on the fixture bottom plate and a clamp arranged on the fixed-point cushion block in a matched manner, the annular pressing structure comprises an annular pressing cushion block located on the clamp bottom plate, a fixing block arranged on the annular pressing cushion block and a limiting pin, a pressurizing ring is further arranged on the top of the annular pressing cushion block, and the clamping pressing structure comprises a clamping cushion block located on the clamp bottom plate and a clamping pressurizing piece set located above the clamping cushion block. And the clamping and pressurizing sheet groups are detachably arranged. According to the utility model, the problem of poor precision caused by deformation of the scissor arms is solved, and a decisive effect on the stability of mass-produced products is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to welding fixture technical field especially a scissors arm welding fixture. BACKGROUND

[0002] Scissors arm is a common cross arm type lifting structure, and the platform lifting is realized by changing the angle of the cross arm.

[0003] At present, most of the industry still adopts the manual welding mode to weld the scissors arm, and since the product precision requirement is high, the welding work greatly depends on the proficiency of the operator; and since the product is large, the stress deformation is prone to occur in the welding process, therefore, the welding precision is difficult to control, and the defective product or even the scrap product often occurs. UTILITY MODEL CONTENTS

[0004] In view of the above-mentioned defects in the prior production technology, the applicant provides a scissors arm welding fixture with a reasonable structure, which is used for multi-directional positioning of the scissors arm to be welded, and ensures that the stress deformation does not easily cause poor precision in the welding process.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A scissors arm welding fixture, comprising a fixture base plate, a plurality of sets of limiting structures are arranged on the fixture base plate along the arm length direction of the scissors arm, comprising a fixed point press-fitting structure, a ring press structure, a clamping press-fitting structure,

[0007] The fixed point press-fitting structure comprises a fixed point pad on the fixture base plate and a clamp cooperatively arranged on the fixed point pad,

[0008] The ring press structure comprises a ring press pad on the fixture base plate, a fixed block and a limiting pin arranged on the ring press pad, and a press ring is further arranged on the top of the ring press pad,

[0009] The clamping press-fitting structure comprises a clamping pad on the fixture base plate and a clamping press sheet group above the clamping pad, and the clamping press sheet group is detachably arranged.

[0010] As a further improvement of the above technical scheme:

[0011] The top of the fixed point pad is formed with a fixed point pin, and the fixed point pin abuts against one side of the part to be positioned.

[0012] The clamp is located on the same side of the part to be positioned close to the fixed point pin.

[0013] The top surface of the ring press pad is symmetrically provided with the fixed block, and the press ring is press-fitted on the top of the fixed block through the fastener,

[0014] The longitudinal height difference between the ring press pad and the press ring forms a ring press limiting space for accommodating the part to be positioned of the scissors arm.

[0015] The limit pin is located in the ring pressure limiting space and abuts against the side wall of the to-be-limited member.

[0016] The same side wall of the same to-be-limited member abuts against a group of limit pins.

[0017] The clamping pad block of the clamping and pressing structure is provided with a groove on the top, and a bottom pressing piece is embedded in the groove; the top of the bottom pressing piece is connected with a top pressing piece through a fastener; and the bottom pressing piece and the top pressing piece clamp a to-be-limited member.

[0018] The top pressing piece is provided with a fastening groove, and the fastener penetrates through the fastening groove; and the groove opening of the fastening groove extends to the edge of the top pressing piece.

[0019] The positions at which the bottom pressing piece and the top pressing piece apply clamping force to the to-be-limited member are the two ends of the pressing piece itself.

[0020] The bottom pressing piece comprises a bending part and a horizontal part; the end of the bending part abuts against the groove on the top of the clamping pad block; and the horizontal part is pressed horizontally on the top surface of the clamping pad block.

[0021] The utility model discloses the beneficial effects are as follows:

[0022] The utility model improves the problem that the precision is poor due to the deformation of the scissors arm, and plays a decisive role in the stability of mass-produced products.

[0023] The utility model relies on three-point positioning principle, according to the long strip shape and welding position requirement of scissors arm, to the multiple connecting places between two long arms are carried out multidirectional limiting, wherein, the connecting position of both ends, mainly exert vertical limiting force, set vertical limiting force and one side limiting force of each cross arm at the cross, play the role of absolute limiting. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is the state schematic view that the utility model's clamp clamps scissors arm.

[0025] Figure 2 It is the state schematic view of another perspective of the utility model's clamp clamping scissors arm.

[0026] Figure 3 It is the schematic view of the utility model's clamp structure, and the scissors arm is hidden in the drawing.

[0027] Figure 4 It is Figure 3 The A part enlarged view is used for embodying fixed-point pressing structure.

[0028] Figure 5 It is Figure 3 The B part enlarged view is used for embodying ring pressure structure.

[0029] Wherein: 1, clamp base plate; 2, fixed point pressure mounting structure; 3, ring pressure structure; 4, clamping pressure mounting structure;

[0030] 201, fixed point pad; 202, clamp; 203, fixed point pin;

[0031] 301, ring pressure pad; 302, fixed block; 303, limit pin; 304, pressure ring; 305, ring pressure limiting space;

[0032] 401, clamping pad; 402, bottom pressure piece; 403, top pressure piece; 404, fastening groove; 405, bending part; 406, horizontal part. DETAILED DESCRIPTION

[0033] The specific implementation of the utility model will be described below in combination with the drawings.

[0034] As Figures 1-5 shown, the scissors arm welding fixture of the embodiment includes a clamp base plate 1, a plurality of sets of limiting structures are arranged on the clamp base plate 1 along the arm length direction of the scissors arm, including a fixed point pressure mounting structure 2, a ring pressure structure 3, and a clamping pressure mounting structure 4,

[0035] The fixed point pressure mounting structure 2 includes a fixed point pad 201 located on the clamp base plate 1 and a clamp 202 arranged on the fixed point pad 201 in cooperation,

[0036] The ring pressure structure 3 includes a ring pressure pad 301 located on the clamp base plate 1, a fixed block 302 and a limit pin 303 arranged on the ring pressure pad 301, and a pressure ring 304 arranged on the top of the ring pressure pad 301,

[0037] The clamping pressure mounting structure 4 includes a clamping pad 401 located on the clamp base plate 1 and a clamping pressure piece group arranged above the clamping pad 401, which can be detachably arranged between the clamping pressure piece group.

[0038] The top of the fixed point pad 201 is formed with a fixed point pin 203, which abuts against one side of the to-be-limited member.

[0039] The clamp 202 is located on the same side of the to-be-limited member close to the fixed point pin 203.

[0040] The top surface of the ring pressure pad 301 is symmetrically provided with the fixed block 302, and the top of the fixed block 302 is pressure-mounted with the pressure ring 304 through a fastener,

[0041] The longitudinal height difference between the ring pressure pad 301 and the pressure ring 304 forms a ring pressure limiting space 305 for accommodating the to-be-limited member of the scissors arm.

[0042] The limit pin 303 is located in the ring pressure limiting space 305 and abuts against the side wall of the to-be-limited member.

[0043] The same side wall of the same to-be-positioned member abuts against a group of limiting pins 303.

[0044] The clamping pad 401 of the clamping and pressing structure 4 is provided with a groove on the top, and a bottom pressing piece 402 is embedded in the groove.

[0045] The top pressing piece 403 is provided with a fastening groove 404, and a fastener is arranged through the fastening groove 404.

[0046] The positions at which the bottom pressing piece 402 and the top pressing piece 403 apply clamping force to the to-be-positioned member are the two ends of the pressing pieces.

[0047] The bottom pressing piece 402 comprises a bent portion 405 and a horizontal portion 406.

[0048] The specific structure and the positioning principle of the utility model are as follows:

[0049] As shown in Figure 1 and Figure 2 , a scissors arm is installed on the clamp bottom plate 1, and the scissors arm is laid flat. Figure 3 From left to right, the following structures are arranged in order: the fixed-point pressing structure 2, the ring pressing structure 3 and the clamping and pressing structure 4.

[0050] As shown in Figure 3 and Figure 4 , the fixed-point pressing structure 2 mainly utilizes the downward pressure of the clamp 202 to press a part of the scissors arm on the fixed-point pad 201.

[0051] As shown in Figure 3 and Figure 5As shown, it is a schematic diagram of the ring pressure structure 3. The ring pressure structure 3 is used for limiting the cross section of the scissors arm, in order to provide sufficient accommodation space and effective limiting force, the utility model discloses a ring pressure structure 3 is designed as two layers of upper and lower, respectively, the ring pressure pad block 301 of bottom and the pressure ring 304 of top. The ring pressure pad block 301 and the pressure ring 304 are connected through the fastener such as screw. In order to reduce the stress on the fastener, the fixed block 302 is additionally arranged on the top surface of the ring pressure pad block 301, and the length of the fastener is compensated. At this time, the ring pressure pad block 301 and the pressure ring 304 form a ring pressure limiting space 305, which can place the cross section of the scissors arm and apply pressure from top to bottom to the cross section.

[0052] The limiting pin 303 is also arranged on the top surface of the ring pressure pad block 301, and the limiting pin 303 is located in the same horizontal plane as the fixed block 302. The height of the limiting pin 303 is not specifically required, as long as it can abut against the cross section of the scissors arm. The left and right of the limiting pin 303 provide abutting limiting force in the horizontal plane.

[0053] As shown in the clamping and pressing structure 4 in the figure, Figure 3 The clamping and pressing structure 4 is a limiting structure for the concave plate in the Figure 1 Figure 2 The clamping and pressing structure 4 compensates for the height difference of the bottom of the concave plate by using the clamping pad 401. A bottom pressing piece 402 is fixedly installed on the top of the clamping pad 401 as a supporting reference for the concave plate. A top pressing piece 403 is added above the concave plate, and the bottom pressing piece 402 and the top pressing piece 403 are locked by screws and other fasteners. Under the premise that the positions of the bottom pressing piece 402 and the pressing pad do not change, the top pressing piece 403 presses the concave plate tightly on the bottom pressing piece 402, and the limiting mode of surface contact further improves the limiting accuracy. In addition, the special-shaped structure of the bottom pressing piece 402: the bending part 405 is embedded in the groove on the top of the clamping pad 401. This design allows the components in the stress process to deform and displace to a certain extent, and on the other hand, through this hollow lap joint structure, the overall stability is higher and the material usage is less.

[0054] The utility model is a non-standard clamp designed for scissors arms, which significantly helps to improve the welding accuracy of scissors arms. The above description is an explanation of the utility model, not a limitation of the utility model. The scope defined by the utility model is referred to the claims, and any form of modification can be made within the protection scope of the utility model.

Claims

1. A shearing arm welding fixture comprising a fixture base plate (1), characterized in that: A plurality of sets of limiting structures are arranged on the clamp base plate (1) along the arm length direction of the scissors arm, including a fixed point press-fitting structure (2), a ring press structure (3), and a clamping press-fitting structure (4), The fixed point press-fitting structure (2) includes a fixed point pad (201) on the clamp base plate (1), and a clamp (202) arranged on the fixed point pad (201), The ring press structure (3) includes a ring press pad (301) on the clamp base plate (1), a fixed block (302) and a limiting pin (303) arranged on the ring press pad (301), and a press ring (304) arranged on the top of the ring press pad (301), The clamping press-fitting structure (4) includes a clamping pad (401) on the clamp base plate (1), and a clamping press piece group arranged above the clamping pad (401), which is detachably arranged between the clamping press piece group.

2. The shear arm welding fixture of claim 1, wherein: The top of the fixed point pad (201) is formed with a fixed point pin (203), which abuts against one side of the to-be-limited part.

3. The shear arm welding fixture of claim 2, wherein: The clamp (202) is located on the same side of the to-be-limited part close to the fixed point pin (203).

4. The shear arm welding fixture of claim 1, wherein: The top surface of the ring press pad (301) is symmetrically provided with a fixed block (302), and the top of the fixed block (302) is press-fitted with a press ring (304) through a fastener, The longitudinal height difference between the ring press pad (301) and the press ring (304) forms a ring press limiting space (305) for accommodating the to-be-limited part of the scissors arm.

5. The shear arm welding fixture of claim 4, wherein: The limiting pin (303) is located in the ring press limiting space (305) and abuts against the side wall of the to-be-limited part.

6. The shear arm welding fixture of claim 5, wherein: The same side wall of the same to-be-limited part abuts against a set of limiting pins (303).

7. The shear arm welding fixture of claim 1, wherein: The clamping pad (401) of the clamping press-fitting structure (4) is slotted at the top, and a bottom press piece (402) is embedded in the slot, the top of the bottom press piece (402) is connected with a top press piece (403) through a fastener, and the bottom press piece (402) and the top press piece (403) clamp a to-be-limited part.

8. The shear arm welding fixture of claim 7, wherein: A fastening groove (404) is formed on the top press piece (403), and a fastener is arranged through the fastening groove (404), and the groove opening of the fastening groove (404) extends to the edge of the top press piece (403).

9. The shear arm welding fixture of claim 8, wherein: The positions where the bottom press piece (402) and the top press piece (403) apply clamping force to the to-be-limited part are the two ends of the press pieces themselves.

10. The shear arm welding fixture of claim 7, wherein: The bottom press piece (402) includes a bent portion (405) and a horizontal portion (406), the end of the bent portion (405) abuts against the slot at the top of the clamping pad (401), and the horizontal portion (406) is pressed against the top surface of the clamping pad (401).

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