Improved clamp for welding rectangular pipe frame

Abstract

The utility model belongs to the technical field of welding, and particularly relates to an improved fixture for welding a rectangular pipe frame, which comprises a horizontally arranged base and a positive and negative tooth double-thread screw, the positive and negative tooth double-thread screw is rotatably connected with the base, two movable blocks are screwed on the positive and negative tooth double-thread screw, and the screwing directions of threads on the two movable blocks are opposite; the movable block is in sliding connection with the guide rod, and the guide rod is parallel to the positive and negative tooth double-thread screw and fixedly connected with the base. A bevel gear B is arranged between the two movable blocks, the bevel gear B is fixedly connected with the positive and negative tooth double-thread screw, the bevel gear B is in meshing transmission with a bevel gear A, the bevel gear A is rotationally connected with a mounting box, the mounting box is fixedly connected with a base, and a hand wheel is coaxially and fixedly connected with the bevel gear A; linear guide rails are hinged to the two ends of each movable block, locking sliding blocks are connected to the linear guide rails in a sliding mode, right-angle chucks are hinged to the locking sliding blocks, and the relative positions of the right-angle chucks and the locking sliding blocks are fixed through manual locking structures. The technical scheme is wide in application range and convenient to operate.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding, and in particular relates to an improved clamp for welding a rectangular pipe frame. Background Art

[0002] When using pipes to weld a rectangular frame, in order to prevent the pipes from moving during the welding process, the pipes are usually clamped and fixed before welding. The utility model patent with publication number CN212793761U discloses a rectangular frame welding tool, which has the following defects:

[0003] 1. When welding rectangular frames of different sizes, the position of the fixed block needs to be adjusted. The adjustment of the fixed block is achieved through the adjustment mounting holes arranged at scattered points. It cannot achieve stepless adjustment and is only suitable for welding rectangular frames of specific sizes.

[0004] 2. When welding rectangular frames of different sizes, the L-shaped angle plate needs to be rotated, and its fixing block is fixed to the bracket by bolts. Each adjustment requires the use of a wrench to tighten or loosen the bolts. If there is no wrench at the construction site, it is not very convenient to tighten or loosen the bolts manually.

[0005] 3. Both sliders pass through the adjusting rod and are slidably connected to the adjusting rod. To fix the positions of the two sliders, at least four nuts need to be screwed with a wrench, which requires a lot of adjustment work. Utility Model Content

[0006] The technical problem to be solved by the utility model is to make up for the deficiencies of the prior art and provide an improved rectangular pipe frame welding clamp.

[0007] To solve the above technical problems, the technical solution of the utility model is:

[0008] An improved rectangular pipe frame welding fixture comprises a horizontally arranged base and a double-ended screw with positive and negative threads, the double-ended screw with positive and negative threads is rotatably connected to the base, two movable blocks are screwed on the double-ended screw with positive and negative threads, and the threads on the two movable blocks have opposite rotation directions; the movable block is slidably connected to a guide rod, the guide rod and the double-ended screw with positive and negative threads are parallel to each other and fixedly connected to the base; a bevel gear B is arranged between the two movable blocks, the bevel gear B is fixedly connected to the double-ended screw with positive and negative threads, the bevel gear B meshes with the bevel gear A for transmission, the bevel gear A is rotatably connected to an installation box, the installation box is fixedly connected to the base, and a hand wheel is coaxially fixedly connected to the bevel gear A; linear guide rails are hinged at both ends of each movable block, a locking slider is slidably connected to the linear guide rail, a right-angle clamp is hinged on the locking slider, and a manual locking structure fixes the relative position of the right-angle clamp and the locking slider.

[0009] Furthermore, the bevel gear B and the bevel gear A are both located in the inner cavity of the installation box, the top of the installation box is provided with an opening, and a top cover is detachably provided at the opening; the bevel gear A is fixedly connected to the rotating shaft, the rotating shaft is rotatably connected to the bearing seat B through a rolling bearing, the bearing seat B is fixedly connected to the top cover, and the opening size at the top of the installation box is larger than the maximum outer diameter size of the bevel gear A.

[0010] Furthermore, one end of the linear guide is fixedly connected to the rotating block A, and the rotating block A is hinged to the movable block; a support leg is fixedly connected below the other end of the linear guide, and a bull's eye ball is fixedly connected below the support leg, and the lowest point of the bull's eye ball is in the same plane as the bottom surface of the base.

[0011] Furthermore, the manual locking structure is specifically as follows: the support plate is horizontally fixed on the locking slider, a stud is fixed on the support plate, the rotating block B is hinged to the support plate through the stud, the butterfly nut is screwed to the stud, the rotating block B is located between the butterfly nut and the support plate, the right-angle clamp is fixedly connected to the rotating block B, and the butterfly nut is tightened to fix the relative position of the right-angle clamp and the locking slider.

[0012] Furthermore, it also includes a storage fixing member, which includes two slots. When the two linear guide rails hinged on the same movable block are in a parallel storage state, the two slots of the storage fixing member are used to respectively limit the rotation of the two linear guide rails.

[0013] The beneficial effects that can be achieved by the utility model are:

[0014] 1. The locking slider is matched with the linear guide rail to achieve stepless adjustment of the right-angle clamp position. It is suitable for welding and clamping of rectangular frames of all sizes within the design size range and has a wide range of adaptability.

[0015] 2. The manual adjustment structure composed of the positive and negative double-ended screw, the movable block, the guide rod, the bevel gear B, the bevel gear A and the handwheel can realize the adjustment of the two movable blocks' movement toward / away from each other without the aid of tools such as wrenches, which is convenient for operation.

[0016] 3. Furthermore, by providing a manual locking structure including butterfly nut adjustment, the right-angle clamp can be switched between the rotation state and the fixed state by manually screwing the butterfly nut, which is easy to operate and does not require the aid of tools. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram (I) of an embodiment of the utility model.

[0018] Figure 2 It is a three-dimensional diagram (two) of an embodiment of the utility model.

[0019] Figure 3 It is a top view of an embodiment of the utility model.

[0020] Figure 4 yes Figure 3 AA section view.

[0021] Figure 5 yes Figure 4 Magnified view of section B.

[0022] Figure 6 yes Figure 1 Magnified view of section C.

[0023] Figure 7 yes Figure 1 Magnified view of section D.

[0024] Figure 8 yes Figure 1 Magnified view of section E.

[0025] Fig. 9 It is a three-dimensional diagram of the storage state of the embodiment of the utility model.

[0026] Fig.10 yes Fig. 9 Magnified view of section F.

[0027] Fig.11 It is a front view of the embodiment of the utility model in the storage state.

[0028] Fig.12 yes Fig.11 GG cross-sectional view.

[0029] Fig.13 This is a top view of the application state of the embodiment of the utility model (I).

[0030] Fig.14 This is a top view of the application state of the embodiment of the utility model (II).

[0031] In the figure: 1-handwheel, 2-top cover, 3-installation box, 4-movable block, 5-rotating block A, 6-base, 7-positive and negative double-ended screw, 8-guide rod, 9-bearing seat A, 10-bracket, 11-linear guide, 12-bearing seat B, 13-rotating shaft, 14-bevel gear A, 15-bearing seat C, 16-bevel gear B, 17-locking slider, 18-locking handle, 19-rotating block B, 20-support plate, 21-right angle clamp, 22-butterfly nut, 23-stud, 24-leg, 25-bull's eye ball, 26-storage fixing part, 2601-slot, 2602-fixing light hole, 27-fixing nut. DETAILED DESCRIPTION

[0032] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] An improved rectangular pipe frame welding fixture includes a horizontally arranged base 6 and a double-ended screw 7, wherein the double-ended screw 7 is rotatably connected to the base 6, and the specific rotatable connection structure is as follows: the two ends of the double-ended screw 7 are respectively connected to a bearing seat A9 through a rolling bearing, the bearing seat A9 is fixedly connected to a bracket 10, and the bracket 10 is fixedly connected to the base 6. Two movable blocks 4 are screwed on the double-ended screw 7, and the threads on the two movable blocks 4 are in opposite directions (one is a left-handed external thread, and the other is a right-handed external thread); the movable block 4 is slidably connected to a guide rod 8, and the guide rod 8 is parallel to the double-ended screw 7 and is fixedly connected to the bracket 10. Both ends of the guide rod 8 are suspended and provided with external threads W.

[0034] The bevel gear B16 is coaxially fixedly connected to the positive and negative double-headed screw 7, the bevel gear B16 is arranged between the two movable blocks 4, the bevel gear B16 is meshed with the bevel gear A14 for transmission, the bevel gear B16 and the bevel gear A14 are both located in the inner cavity of the installation box 3, and the installation box 3 is fixedly connected to the base 6; an opening is provided on the top of the installation box 3, and a top cover 2 is detachably provided at the opening; the bevel gear A14 is fixedly connected to the rotating shaft 13, the rotating shaft 13 is rotatably connected to the bearing seat B12 through a rolling bearing, the bearing seat B12 is fixedly connected to the top cover 2, and the opening size at the top of the installation box 3 is larger than the maximum outer diameter size of the bevel gear A14 (in order to facilitate the disassembly and assembly of the bevel gear A14); the handwheel 1 is coaxially fixedly connected to the bevel gear A14, and manually rotating the handwheel 1 can drive the two movable blocks 4 to move linearly toward or away from each other. Since the double-ended screw rod 7 is relatively slender, a bearing seat C15 is rollingly connected to the middle of the double-ended screw rod 7 through a rolling bearing. The bearing seat C15 is fixedly connected to the mounting box 3 to provide redundant support for the double-ended screw rod 7 and ensure the rigidity of the structure.

[0035] Both ends of each movable block 4 are hinged with a linear guide 11 (the linear guide selected in this embodiment is the existing SBR linear guide with aluminum bracket optical axis on sale), and the hinge method is: one end of the linear guide 11 is fixedly connected to the rotating block A5, and the rotating block A5 is hinged to the movable block 4. The other end of the linear guide 11 is fixedly connected to a leg 24 below, and a bull's eye ball 25 is fixedly connected to the lower part of the leg 24, and the lowest point of the bull's eye ball 25 is in the same plane as the bottom surface of the base 6.

[0036] The linear guide 11 is slidably connected with a locking slider 17. The locking handle 18 on the locking slider 17 can be manually operated to lock the locking slider 17 and the linear guide 11. The linear guide 11 is provided with a scale for calibrating the position of the locking slider 17. The support plate 20 is horizontally fixed on the locking slider 17. The support plate 20 is fixed with a stud 23. The rotating block B19 is hinged with the support plate 20 through the stud 23. The butterfly nut 22 is screwed with the stud 23. The rotating block B19 is located between the butterfly nut 22 and the support plate 20. The right-angle clamp 21 is fixedly connected with the rotating block B19. Tightening the butterfly nut 22 fixes the relative position of the right-angle clamp 21 and the locking slider 17.

[0037] In order to facilitate storage, two storage fixing members 26 are also designed. Fig.12 As shown, the storage fixing member 26 includes two slots 2601 and two fixed light holes 2602. When the two linear guide rails 11 hinged on the same movable block 4 are in a parallel storage state (such as Fig. 9 As shown in the figure, the two slots 2601 of the receiving fixture 26 are used to respectively limit the rotation of the two linear guide rails 11, and the two fixed light holes 2602 are respectively sleeved on the corresponding guide rods 8. The fixing nut 27 is screwed on the external thread W on the guide rod 8 to fix the receiving fixture 26 on the bracket 10.

[0038] Use of this embodiment: Fig.13 and Fig.14 As shown, first manually turn the hand wheel 1 so that the two movable blocks 4 are close to the middle part of the left part and the middle part of the right part respectively; estimate the approximate position of the diagonal of the frame to be welded, and turn the four linear guide rails 11 into an X shape; operate the locking handle 18 on the locking slider 17 so that the locking slider 17 can slide on the linear guide rail 11, and adjust the locking slider 17 appropriately according to the length of the horizontal tube and the vertical tube of the welding material. The scale value on the linear guide rail 11 corresponding to the position of each locking slider 17 is the same; loosen the butterfly nut 22 so that the right-angle clamp 21 can be rotated ; First, place the two longitudinal tubes (or transverse tubes) against the corresponding right-angle clamps 21 and place them on the corresponding support plate 20, tighten the butterfly nut 22 to fix the locking slider 17 to the linear guide 11; then place the transverse tube (if the transverse tube is placed first, place the longitudinal tube here) as close to the corresponding right-angle clamp 21 as possible and place it on the corresponding support plate 20; operate the locking handle 18 on the locking slider 17 to fix the locking slider 17 to the linear guide 11; turn the handwheel 1 to bring the two movable blocks 4 closer to each other until they can no longer be turned, and the clamping is completed, such as Fig.13 and Fig.14 As shown, the subsequent welding process can then be carried out.

[0039] When storage is required, the two linear guide rails 11 are adjusted to a parallel storage state, such as Fig. 9As shown, the two storage fixing members 26 are respectively used to fix the positions of the two linear guides 11 on the left and the two linear guides 11 on the right. The two card slots 2601 of the storage fixing member 26 are respectively correspondingly clamped on the outside of the two linear guides 11 on the same side to limit the rotation of the linear guides 11. At the same time, the two fixed light holes 2602 are respectively sleeved on the corresponding guide rods 8, and the fixing nut 27 is screwed on the external thread W on the guide rod 8 to fix the storage fixing member 26 on the bracket 10.

Claims

1. An improved rectangular pipe frame welding fixture, characterized by: The invention comprises a horizontally arranged base (6) and a helical double-ended screw (7), wherein the helical double-ended screw (7) is rotatably connected to the base (6), and two movable blocks (4) are screwed onto the helical double-ended screw (7), wherein the threads of the two movable blocks (4) are in opposite directions; the movable blocks (4) are slidably connected to a guide rod (8), wherein the guide rod (8) and the helical double-ended screw (7) are parallel to each other and are fixedly connected to the base (6); a bevel gear B (16) is arranged between the two movable blocks (4), and the bevel gear B (16) is fixedly connected to the helical double-ended screw (7). The gear B (16) is meshed with the bevel gear A (14) for transmission, the bevel gear A (14) is rotationally connected to the installation box (3), the installation box (3) is fixedly connected to the base (6), and the hand wheel (1) is coaxially fixedly connected to the bevel gear A (14); both ends of each movable block (4) are hingedly connected to a linear guide rail (11), a locking slider (17) is slidably connected to the linear guide rail (11), a right-angle clamp (21) is hingedly connected to the locking slider (17), and a manual locking structure fixes the relative position of the right-angle clamp (21) and the locking slider (17).

2. The improved rectangular pipe frame welding fixture according to claim 1 is characterized in that: The bevel gear B (16) and the bevel gear A (14) are both located in the inner cavity of the installation box (3); an opening is provided at the top of the installation box (3); a top cover (2) is detachably provided at the opening; the bevel gear A (14) is fixedly connected to the rotating shaft (13); the rotating shaft (13) is rotatably connected to the bearing seat B (12) via a rolling bearing; the bearing seat B (12) is fixedly connected to the top cover (2); and the size of the opening at the top of the installation box (3) is larger than the maximum outer diameter of the bevel gear A (14).

3. The improved rectangular pipe frame welding fixture according to claim 1 is characterized in that: One end of the linear guide rail (11) is fixedly connected to the rotating block A (5), and the rotating block A (5) is hinged to the movable block (4); a support leg (24) is fixedly connected below the other end of the linear guide rail (11), and a bull's eye ball (25) is fixedly connected below the support leg (24), and the lowest point of the bull's eye ball (25) is in the same plane as the bottom surface of the base (6).

4. The improved rectangular pipe frame welding fixture according to claim 1 is characterized in that: The manual locking structure is specifically as follows: a support plate (20) is horizontally fixed on the locking slider (17); a stud (23) is fixedly provided on the support plate (20); a rotating block B (19) is hinged to the support plate (20) via the stud (23); a butterfly nut (22) is screwed to the stud (23); the rotating block B (19) is located between the butterfly nut (22) and the support plate (20); the right-angle clamp (21) is fixedly connected to the rotating block B (19); and the butterfly nut (22) is tightened to fix the relative position of the right-angle clamp (21) and the locking slider (17).

5. The improved rectangular pipe frame welding fixture according to claim 1 is characterized in that: It also includes a storage fixing member (26), which includes two slots (2601). When the two linear guide rails (11) hinged on the same movable block (4) are in a parallel storage state, the two slots (2601) of the storage fixing member (26) are used to respectively limit the rotation of the two linear guide rails (11).

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