A forklift tailstock assembly welding positioning fixture

Abstract

This utility model relates to the field of forklift assembly technology, specifically disclosing a welding and positioning fixture for assembling a forklift tailstock. It includes a base frame, on which a crossbeam is fixedly connected. The crossbeam supports the forklift tailstock. A first clamping group in the X-axis direction is provided on the crossbeam, and clamping groups in the Z-axis direction are provided on both sides of the crossbeam located on the forklift tailstock. A positioning group is provided on the crossbeam for positioning the forklift tailstock. A second clamping group in the Y-axis direction is provided on both sides of the base frame located on the forklift tailstock. This utility model limits the forklift tailstock in multiple directions through the first clamping group, clamping group, and second clamping group, ensuring that the welded tailstock aligns with the assembly holes of the entire vehicle. It achieves high positioning accuracy, reduces manual adjustment time, enables rapid batch clamping, has high clamping efficiency, can adapt to different specifications of forklift tailstocks, reduces equipment investment costs, and has strong versatility.

Description

Technical Field

[0001] This utility model relates to the field of forklift assembly technology, specifically a forklift tailstock assembly welding and positioning fixture. Background Technology

[0002] The forklift frame is the main structural element of the forklift, while the tailstock is a structural component at the rear of the frame used to attach counterweights to balance the weight of the goods. Forklift tailstocks are typically welded from various sheet metal parts, requiring clamping fixtures to position and secure each part during welding, ensuring precision.

[0003] In existing forklift manufacturing processes, the welding of the tailstock mainly relies on welders manually positioning and spot welding on a welding platform. The following problems are commonly found in existing technologies: 1) Poor positioning accuracy: Since the tail frame structure is mostly a combination of multiple bent pipes or irregular parts, manual alignment of the angles, spacing and positions of each component is prone to deviation. Especially under the influence of welding heat deformation, the overall dimensional tolerance is difficult to control, causing the mounting holes of the tail frame and the vehicle body to be misaligned, affecting the assembly accuracy. 2) Low clamping efficiency: Most existing welding platforms are flat structures and lack special positioning fixtures for the specific structure of the tailstock. Workers need to make repeated adjustments and temporarily add shims or clamps to clamp the parts, resulting in long process preparation time and low production efficiency. 3) Insufficient versatility and adjustability: Some existing tooling is of fixed size, which makes it difficult to meet the production needs of different models of forklift tail racks. Once the product specifications change, the tooling needs to be remade, increasing equipment investment.

[0004] To address these issues, this application proposes a forklift tailstock assembly welding positioning fixture. Utility Model Content

[0005] To address the existing problems, this utility model provides a forklift tailstock assembly welding positioning fixture, which can effectively solve the problems mentioned in the background art.

[0006] To solve the above problems, the present invention adopts the following technical solution: A forklift tailstock assembly welding and positioning fixture includes a base frame, on which a crossbeam is fixedly connected. The crossbeam supports the forklift tailstock. The crossbeam has a first clamping group in the X-axis direction, and clamping groups in the Z-axis direction are located on both sides of the crossbeam on the forklift tailstock. The crossbeam has a positioning group for positioning the forklift tailstock. The base frame has a second clamping group in the Y-axis direction on both sides of the forklift tailstock.

[0007] As a further embodiment of this utility model: the first clamping group includes a symmetrically arranged first cylinder clamping group, which is used to clamp and fix the end plates of both ends of the forklift tail frame. The first cylinder clamping group includes a first cylinder and a second cylinder. A tension rod is fixed to the telescopic end of the first cylinder, and a connecting plate is fixedly connected to the telescopic end of the second cylinder. A tension block is fixedly connected to the connecting plate, and the tension block is arranged opposite to the tension rod.

[0008] As a further improvement of this utility model: positioning blocks are fixed on both sides of the clamping block, and bolts are threaded onto the positioning blocks, with the screw-in end of the bolts close to the clamping rod.

[0009] As a further embodiment of this utility model: the first clamping group further includes a second clamping group, the second clamping group includes a first upright and a second upright provided at both ends of the cross brace, a third cylinder is fixedly installed on the first upright, there are two third cylinders and each of them is provided with a positioning plate at its telescopic end, the positioning end face is provided with a positioning protrusion, a fourth cylinder is fixedly installed on the second upright, and a top clamping plate is fixedly connected to the telescopic end of the fourth cylinder.

[0010] As a further improvement of this utility model: the positioning group includes four columns, the columns are fixedly connected to the cross bracing beam, and the top surface of the columns is provided with positioning posts.

[0011] As a further embodiment of this utility model: the second clamping group includes two third uprights symmetrically fixed on the base frame, a fifth cylinder is fixedly installed on the third upright, and a clamping plate is fixedly connected to the telescopic end of the fifth cylinder. The clamping plate connected to the fifth cylinder is used to position and fix the diagonal brace plate on the forklift tail frame.

[0012] As a further embodiment of this utility model: the second clamping group further includes a third clamping group, which consists of two symmetrically arranged clamping groups. The third clamping group includes a sixth cylinder and a seventh cylinder. The telescopic end of the sixth cylinder is fixed with a clamping rod, and the telescopic end of the seventh cylinder is fixed with a clamping plate. The clamping rod and the clamping plate are used to clamp and fix the bending plate of the forklift tail carriage.

[0013] As a further embodiment of this utility model: the clamping assembly includes an eighth cylinder, the telescopic end of the eighth cylinder is provided with a rotating shaft, a pressure rod is rotatably connected to the rotating shaft, and the eighth cylinder drives the pressure plate to move and clamp the crossbeam plate of the forklift tail frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are: this utility model limits the forklift tail frame in multiple directions through the first clamping group, the pressing group and the second clamping group, ensuring that the welded tail frame is consistent with the assembly hole position of the whole vehicle, with high positioning accuracy, reducing manual adjustment time, realizing batch rapid clamping, high clamping efficiency, adapting to different specifications of forklift tail frames, reducing equipment investment costs, and strong versatility. Attached Figure Description

[0015] Figure 1 A three-dimensional schematic diagram of the overall structure of a forklift tailstock assembly welding positioning fixture; Figure 2 A three-dimensional schematic diagram of the first clamping group in a welding positioning fixture for assembling a forklift tailstock; Figure 3 for Figure 2 Another perspective 3D illustration; Figure 4 A schematic diagram of the first clamping group in a welding positioning fixture for assembling a forklift tailstock; Figure 5 A three-dimensional schematic diagram of a forklift tailstock assembly welding positioning fixture. Figure 6 A three-dimensional schematic diagram of a forklift tailstock assembly welding positioning fixture clamping the forklift tailstock. Figure 7 This is a schematic diagram of a forklift tailstock assembly welding positioning fixture clamping the forklift tailstock.

[0016] In the diagram: 100. Forklift tailstock; 101. Crossbeam plate; 102. U-shaped ear plate; 103. End plate; 104. Diagonal brace plate; 105. Bend plate; 106. End block; 107. Mounting hole; 108. Fixing hole; 1. Base frame; 2. Cross brace beam; 3. First clamping assembly; 31. First cylinder; 32. Second cylinder; 33. Tensioning rod; 34. Connecting plate; 35. Tensioning block; 36. Positioning block; 37. Bolt; 38. First upright; 39. Second upright; 310, Third cylinder; 311, Positioning plate; 312, Positioning protrusion; 313, Fourth cylinder; 314, Top clamping plate; 4, Pressing assembly; 41, Eighth cylinder; 42, Pressure rod; 5, Positioning assembly; 51, Column; 52, Positioning column; 6, Second clamping assembly; 61, Support rod; 62, Third upright; 63, Fifth cylinder; 64, Clamping plate; 65, Sixth cylinder; 66, Seventh cylinder; 67, Clamping rod; 68, Clamping plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Combination Figures 1 to 7 This embodiment provides a welding positioning fixture for assembling a forklift tailstock 100. Specifically, the forklift tailstock 100 includes a crossbeam plate 101. Both ends of the crossbeam plate 101 have U-shaped lugs 102 with fixing holes 108 at both ends. Both ends of the crossbeam plate 101 have end plates 103 that fit against the U-shaped lugs 102. Symmetrical diagonal bracing plates 104 are provided on both sides of the crossbeam plate 101. Two symmetrical curved plates 105 are fixed to one end of the crossbeam plate 101, and an end block 106 is fixed to the other end of the crossbeam plate 101. The end block 106 has two mounting holes 107. The welding fixture provided in this embodiment is used to precisely clamp the various components of the forklift tailstock 100, thereby improving welding accuracy.

[0019] like Figure 1-7 As shown, specifically, the welding fixture for the forklift tail carriage 100 includes a base frame 1, on which a cross brace 2 is fixedly connected. The cross brace 2 supports the forklift tail carriage 100. The cross brace 2 is provided with a first clamping group 3 in the X-axis direction, which is used to position and clamp the components at both ends of the forklift tail carriage 100. The cross brace 2 is provided with a pressing group 4 in the Z-axis direction on both sides of the forklift tail carriage 100. The pressing group 4 is used to press down the crossbeam plate 101 of the forklift tail carriage 100 to achieve clamping and positioning in the Z-axis direction. The cross brace 2 is provided with a positioning group 5, which is used to position the forklift tail carriage 100. Specifically, the positioning group 5 positions the positioning holes of the U-shaped ear plate 102. The base frame 1 is provided with a second clamping group 6 in the Y-axis direction on both sides of the forklift tail carriage 100. The second clamping group 6 clamps and positions the bent plate 105 and the inclined support plate 104 of the forklift tail carriage 100.

[0020] like Figure 2-4As shown, specifically, the first clamping group 3 includes symmetrically arranged first cylinder clamping groups. These first cylinder clamping groups are used to clamp and fix the end plates of the forklift tail carriage 100. Each first cylinder clamping group includes a first cylinder 31 and a second cylinder 32. A tensioning rod 33 is fixed to the telescopic end of the first cylinder 31, and a connecting plate 34 is fixedly connected to the telescopic end of the second cylinder 32. A tensioning block 35 is fixedly connected to the connecting plate 34. The tensioning block 35 is positioned opposite to the tensioning rod 33. The first cylinder 31 drives the tensioning rod 33, and the second cylinder 32 drives the tensioning block 35. The end plate is positioned between the clamping rod 33 and the clamping block 35 to achieve the positioning and clamping of the end plate. The size of the clamping block 35 is larger than the side size of the U-shaped ear plate 102. When the clamping block 35 is in low contact, it can be in low contact with the U-shaped ear plate 102 to achieve the lateral positioning of the U-shaped ear plate 102. At the same time, positioning blocks 36 are fixed on both sides of the clamping block 35. Bolts 37 are threadedly connected to the positioning blocks 36. The screw-in end of the bolts 37 is close to the clamping rod 33. The bolts 37 can be used to pre-position one side of the end plate to facilitate the positioning of the end plate.

[0021] like Figure 2 As shown, the first clamping group 3 further includes a second clamping group. The second clamping group includes a first upright 38 and a second upright 39 located at both ends of the cross brace 2. A third cylinder 310 is fixedly installed on the first upright 38. There are two third cylinders 310, and each of them has a positioning plate 311 at its telescopic end. The end face of the positioning plate 311 has a positioning protrusion 312. A fourth cylinder 313 is fixedly installed on the second upright 39. A top clamping plate 314 is fixedly connected to the telescopic end of the fourth cylinder 313. The third cylinder 310 drives the positioning plate 311 to move toward the end block 106. The positioning protrusion 312 on the end block 106 matches the mounting hole 107, thereby achieving the positioning and fixing of the end block 106. At the same time, the fourth cylinder 313 on the second upright 39 drives the top clamping plate 314 to press against the connection part of the two bent plates 105, thereby clamping and fixing the bent plates 105.

[0022] like Figure 3 As shown, the positioning group 5 further includes four columns 51, which are fixedly connected to the cross brace beam 2. The top surface of the column 51 is provided with a positioning column 52, which is correspondingly set with the fixing holes at both ends of the U-shaped ear plate 102. The positioning column 52 is used to position the U-shaped ear plate 102.

[0023] like Figure 1 As shown, the second clamping group 6 further includes two third uprights 62 symmetrically fixed on the base frame 1. A fifth cylinder 63 is fixedly installed on the third upright 62. A clamping plate 64 is fixedly connected to the telescopic end of the fifth cylinder 63. The clamping plate 64 connected to the fifth cylinder 63 is used to position and fix the diagonal brace 104 on the forklift tail frame 100.

[0024] like Figure 1As shown, the second clamping group 6 further includes a third clamping group, which consists of two symmetrically arranged clamping groups. The third clamping group includes a sixth cylinder 65 and a seventh cylinder 66. A clamping rod 67 is fixed to the telescopic end of the sixth cylinder 65, and a clamping plate 68 is fixed to the telescopic end of the seventh cylinder 66. The clamping rod 67 and clamping plate 68 are used to clamp and fix the bent plate 105 of the forklift tailstock 100. In conjunction with the fourth cylinder 313 driving the top clamping plate 314 to clamp the connecting parts of the two bent plates 105, the overall structure of the bent plate 105 is clamped and fixed. To improve the welding stability of the bent plate 105, a support rod 61 is fixed to the crossbeam 2. The support rod 61 is used for mid-position support of the bent plate 105.

[0025] like Figure 3 As shown, the clamping assembly 4 further includes an eighth cylinder 41. The telescopic end of the eighth cylinder 41 is provided with a rotating shaft, and a pressure rod 42 is rotatably connected to the rotating shaft. The eighth cylinder 41 drives the pressure plate to move and clamp the crossbeam plate 101 of the forklift tail frame 100, thereby achieving clamping and limiting of the forklift tail frame 100 in the Z-axis direction.

[0026] During the actual installation, a protective cover is wrapped around the outside of the cylinders to protect them and prevent damage during welding, which would affect their service life.

[0027] The working principle of this utility model is as follows: the first clamping group 3, the pressing group 4 and the second clamping group 6 limit the forklift tail frame 100 in multiple directions, ensuring that the welded tail frame is consistent with the assembly hole position of the whole vehicle, with high positioning accuracy, reducing manual adjustment time, realizing batch rapid clamping, high clamping efficiency, and can be adapted to different specifications of forklift tail frames 100, reducing equipment investment costs and strong versatility.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A forklift tailstock assembly welding and positioning fixture, comprising a base frame, characterized in that, A cross brace is fixedly connected to the bottom frame. The cross brace is used to support the forklift tail carriage. The cross brace is provided with a first clamping group in the X-axis direction. The cross brace is provided with a pressing group in the Z-axis direction on both sides of the forklift tail carriage. The cross brace is provided with a positioning group for positioning the forklift tail carriage. The bottom frame is provided with a second clamping group in the Y-axis direction on both sides of the forklift tail carriage.

2. The forklift tailstock assembly welding positioning fixture according to claim 1, characterized in that, The first clamping group includes a symmetrically arranged first cylinder clamping group, which is used to clamp and fix the end plates of the two ends of the forklift tail frame. The first cylinder clamping group includes a first cylinder and a second cylinder. A tension rod is fixed to the telescopic end of the first cylinder, and a connecting plate is fixedly connected to the telescopic end of the second cylinder. A tension block is fixedly connected to the connecting plate, and the tension block is arranged opposite to the tension rod.

3. The forklift tailstock assembly welding positioning fixture according to claim 2, characterized in that, Positioning blocks are fixed on both sides of the clamping block, and bolts are threaded onto the positioning blocks, with the screw-in end of the bolts close to the clamping rod.

4. The forklift tailstock assembly welding positioning fixture according to claim 3, characterized in that, The first clamping group further includes a second clamping group, which includes a first upright and a second upright at both ends of the cross brace. A third cylinder is fixedly installed on the first upright. There are two third cylinders, and each of them has a positioning plate at its telescopic end. The positioning end face has a positioning protrusion. A fourth cylinder is fixedly installed on the second upright. The telescopic end of the fourth cylinder is fixedly connected to a top clamping plate.

5. The forklift tailstock assembly welding positioning fixture according to claim 1, characterized in that, The positioning assembly includes four columns, which are fixedly connected to the cross bracing beam, and the top surface of each column is provided with a positioning post.

6. The forklift tailstock assembly welding positioning fixture according to claim 1, characterized in that, The second clamping assembly includes two third uprights symmetrically fixed on the base frame. A fifth cylinder is fixedly installed on the third upright. A clamping plate is fixedly connected to the telescopic end of the fifth cylinder. The clamping plate connected to the fifth cylinder is used to position and fix the diagonal brace plate on the forklift tailstock.

7. The forklift tailstock assembly welding positioning fixture according to claim 6, characterized in that, The second clamping group also includes a third clamping group, which consists of two symmetrically arranged clamping groups. The third clamping group includes a sixth cylinder and a seventh cylinder. The extension end of the sixth cylinder is fixed with a clamping rod, and the extension end of the seventh cylinder is fixed with a clamping plate. The clamping rod and clamping plate are used to clamp and fix the bending plate of the forklift tail carriage.

8. The forklift tailstock assembly welding positioning fixture according to claim 1, characterized in that, The clamping assembly includes an eighth cylinder, the telescopic end of which is provided with a rotating shaft, and a pressure rod is rotatably connected to the rotating shaft. The eighth cylinder drives the pressure plate to move and clamp the crossbeam plate of the forklift tail frame.

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