Forklift frame welding, assembling and positioning tool

Abstract

The utility model provides a forklift frame welding assembly positioning tool which comprises a base, a positioning supporting frame and an arc-shaped positioning piece, the positioning supporting frame comprises supporting plates and a reinforcing beam, the supporting plates are symmetrically arranged on the base in parallel and correspond to the distance between a left box body and a right box body of a frame, and the arc-shaped positioning piece is arranged on the base. Limiting holes are formed in the upper ends of the reinforcing beams corresponding to lugs on the inner side plates of the left box body and the right box body, the two ends of the reinforcing beams are connected to the corresponding supporting plates respectively, the arc-shaped positioning blocks are correspondingly arranged on the outer sides of the supporting plates, and positioning holes are formed in the arc-shaped positioning blocks corresponding to through holes in the front ends of the inner side plates. Limiting blocks are arranged at the end, away from the positioning supporting frame, of the base and correspond to end plate bodies of the left box body and the right box body respectively, and a plurality of ejector blocks used for supporting the bottoms of the left box body and the right box body are arranged on the base between the limiting blocks and the supporting plate. Through the multi-point positioning design of the limiting holes, the positioning holes and the limiting blocks, accurate positioning of the frame in all directions is ensured, the welding quality is improved, and the repair workload is reduced.

Description

Technical Field

[0001] This utility model relates to the field of forklift assembly, and in particular to a forklift frame welding assembly positioning fixture. Background Technology

[0002] Forklifts are industrial material handling vehicles, referring to various wheeled vehicles used for loading, unloading, stacking, and short-distance transport of palletized goods. The International Organization for Standardization (ISO / TC110) refers to them as industrial vehicles. They are commonly used for transporting large items in warehouses and are typically powered by internal combustion engines or batteries. The forklift frame includes the underframe and overhead guards. The underframe mainly consists of a panel enclosure, left and right side boxes, and a front guard plate. Figure 1 As shown, forklifts are used to move heavy goods, so the manufacturing standards for forklifts are very strict. The forklift chassis is generally a welded structure, which requires welding and other processing methods. Operators usually weld two parts first, and then manually place or support the other parts related to the first two parts according to the design requirements for welding. This traditional forklift chassis welding method greatly affects the processing accuracy of the forklift chassis welding process, making it impossible to install the front plate, instrument bracket, and front legs of the overhead guard during assembly. This results in a large amount of rework, slow assembly, low efficiency, and seriously affects the production schedule.

[0003] Existing technology CN201611098381.7 discloses a forklift tailstock assembly and welding fixture, including a tailstock common base. Positioner bases are provided at both ends of the top of the common base. A robot base is connected to one side of the middle of the common base. A cleaning gun and wire-cutting bracket is provided on one side of the robot base. A positioner is provided on the top of the positioner base, and a fixture is connected to the output end of the positioner. Although this solution achieves the integrated assembly and welding of the forklift frame, it still has the following problems:

[0004] 1. After the existing chassis frame is assembled and welded, it needs to be removed from the positioning fixture before it can be assembled. In order to ensure the assembly accuracy, the chassis frame and the top guard frame need to be fixed and aligned again, which greatly affects the production efficiency.

[0005] 2. Existing top support frames are prone to deformation during installation, making it difficult to accurately align the screw holes, which leads to installation difficulties and greatly affects production efficiency.

[0006] 3. The existing positioning fixtures have a relatively complex structure, and operators need to undergo specialized training to master the operation methods, which increases the company's training costs. At the same time, the complex operation process also reduces production efficiency. Utility Model Content

[0007] In view of this, the purpose of this utility model is to provide a forklift frame welding assembly positioning fixture. Through the multi-point positioning design of limit holes, positioning holes and limit blocks, the fixture ensures the accurate positioning of the frame in all directions, improves the welding quality, reduces the amount of rework, and has a simple structure that is easy to use.

[0008] The technical solution adopted by this utility model to solve its technical problem is:

[0009] A forklift frame welding assembly positioning fixture is provided, comprising: a base, a positioning support frame, and an arc-shaped positioning component.

[0010] The positioning support frame includes a support plate and a reinforcing beam. The support plate is symmetrically and parallelly arranged on the base, and is set according to the distance between the left and right boxes of the vehicle frame. The upper end of the support plate is provided with a limiting hole corresponding to the ear on the inner side plate of the left and right boxes. The two ends of the reinforcing beam are respectively connected to the corresponding support plate. The arc-shaped positioning block is correspondingly arranged on the outer side of the support plate, and is provided with a positioning hole corresponding to the through hole at the front end of the inner side plate. The end plate of the base away from the positioning support frame is provided with a limiting block corresponding to the end plate of the left and right boxes. The base between the limiting block and the support plate is provided with several top blocks for supporting the bottom of the left and right boxes.

[0011] It should be noted that the limiting holes are located at the upper end of the support plate, corresponding to the through holes of the lugs on the inner side panels of the left and right housings. By inserting positioning pins or other fasteners, the frame is accurately positioned in the vertical direction. The positioning holes are located on the arc-shaped positioning blocks, corresponding to the through holes at the front end of the inner side panels, ensuring the frame is accurately positioned in the horizontal direction. The limiting blocks are located on the base, corresponding to the end plates of the left and right housings, restricting the lateral movement of the frame and ensuring the frame's lateral stability. Multi-point positioning (limiting holes, positioning holes, and limiting blocks) ensures the frame's accurate positioning in all directions, improving welding quality. Because the front skid plate extends downwards from the left and right housings, there is a height difference between the lower end of the front skid plate and the lower surface of the housing bottom plate. The top block's support compensates for this height difference, ensuring the frame remains level during welding and avoiding welding quality problems caused by vibration.

[0012] Preferably, the base includes a square frame and a base plate, the base plate being symmetrically arranged on the square frame and respectively corresponding to the left and right boxes on both sides above the square frame.

[0013] It should be noted that the combination design of the square frame and the base plate provides a solid support foundation, ensuring the stability of the entire positioning fixture. The symmetrical arrangement of the base plate allows the fixture to support the left and right boxes respectively, and reduces the overall weight of the fixture to a certain extent, making it easier to transport.

[0014] Preferably, reinforcing plates are provided at intervals at the angle between the lower surface of the base plate and the side of the square frame.

[0015] It should be noted that the reinforcing plate is located at the angle between the lower surface of the base plate and the side of the square frame, which effectively enhances the overall rigidity of the base, reduces deformation under heavy loads, and improves the service life and stability of the tooling.

[0016] Preferably, the support plate is shaped like a "7" and its upper end is arc-shaped. The limiting hole is located at the upper end of the support plate, the positioning hole is located at the front end of the support plate, and a reinforcing strip is provided between the inner side of the support plate and the bottom plate.

[0017] It should be noted that the "7"-shaped design of the support plate makes efficient use of space. The setting of the limiting holes and positioning holes ensures the accurate positioning of the left and right inner side panels in the front and upper directions. The setting of the reinforcing strip enhances the rigidity of the support plate, avoids deformation due to stress during welding, and ensures the stability of positioning.

[0018] Preferably, the thickness of the arc-shaped positioning is consistent with the thickness of the mounting component on the inner side plate.

[0019] It should be noted that the thickness of the arc-shaped positioning block is consistent with the thickness of the mounting parts on the inner side plate. This not only ensures a tight fit between the arc-shaped positioning block and the inner side plate, preventing loosening during the welding process, but also ensures that the space between the left and right boxes remains at a fixed size, providing reserved space for the mounting parts. This ensures that other components on the base frame can be assembled smoothly in the later stages, improving production efficiency.

[0020] Preferably, the top block is adjustablely mounted on the base, and the lower surfaces of the left and right boxes can be kept level by adjusting the height of the top block.

[0021] It should be noted that the adjustable height design of the top block allows the tooling to adapt to the bottom of the box with different height differences, improving the tooling's versatility and flexibility.

[0022] Preferably, the square frame has adjustable foot pads at its four corners.

[0023] It should be noted that the height of the foot pads can be adjusted by changing the foot pads of different thicknesses. The adjustable foot pads ensure the level and stability of the base, preventing the tooling from tilting due to uneven ground and improving welding quality. This design is suitable for different ground conditions, increasing the applicability of the tooling and ensuring stability and reliability in various environments.

[0024] The beneficial effects of this utility model are:

[0025] This utility model provides a forklift frame welding assembly positioning fixture. Through the multi-point positioning design of limit holes, positioning holes and limit blocks, it ensures the accurate positioning of the frame in all directions, improves welding quality and reduces rework workload. The top block design allows the fixture to adapt to the bottom of the box with height differences, improves the versatility and flexibility of the fixture, reduces the time required for adjusting the fixture and improves production efficiency. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of a forklift frame according to Embodiment 1 of this utility model.

[0027] Figure 2 This is a three-dimensional structural diagram of a forklift frame welding assembly positioning fixture according to Embodiment 1 of this utility model.

[0028] Figure 3 This is a schematic diagram of the lower structure of a forklift frame welding assembly positioning fixture according to Embodiment 2 of this utility model.

[0029] Figure 4 This is a diagram showing the usage state of a forklift frame welding assembly positioning fixture according to Embodiment 1 of this utility model.

[0030] In the diagram: 1. Base frame; 11. Left and right boxes; 12. Inner side plate; 121. Through hole; 13. Ear; 14. Mounting component; 2. Base; 21. Square frame; 22. Base plate; 3. Positioning support frame; 31. Support plate; 311. Limiting hole; 32. Reinforcing beam; 33. Reinforcing strip; 4. Arc-shaped positioning component; 41. Positioning hole; 5. Limiting block; 6. Top block; 7. Reinforcing plate; 8. Foot pad.

[0031] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0032] 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.

[0033] Example 1

[0034] like Figure 1-Figure 4 As shown, a forklift frame welding assembly positioning fixture includes: a base 2, a positioning support frame 3, and an arc-shaped positioning component 4.

[0035] The positioning support frame 3 includes a support plate 31 and a reinforcing beam 32. The support plate 31 is symmetrically and parallelly arranged on the base 2, and is set according to the distance between the left and right boxes 11 of the frame. The upper end of the support plate 31 is provided with a limiting hole 311 corresponding to the ear 13 on the inner side plate 12 of the left and right boxes 11. The two ends of the reinforcing beam 32 are respectively connected to the corresponding support plate 31. The arc-shaped positioning block is correspondingly arranged on the outer side of the support plate 31, and is provided with a positioning hole 41 corresponding to the through hole 121 at the front end of the inner side plate 12. The end of the base 2 away from the positioning support frame 3 is provided with a limiting block 5 corresponding to the end plate of the left and right boxes 11. The base 2 between the limiting block 5 and the support plate 31 is provided with a plurality of top blocks 6 for supporting the bottom of the left and right boxes 11.

[0036] The base 2 includes a square frame 21 and a base plate 22. The base plate 22 is symmetrically arranged on the square frame 21 and is respectively arranged on both sides above the square frame 21 corresponding to the left and right boxes 11.

[0037] A reinforcing plate 7 is provided at intervals at the angle between the lower surface of the base plate 22 and the side of the square frame 21.

[0038] The support plate 31 is shaped like a "7" and its upper end is arc-shaped. The limiting hole 311 is located at the upper end of the support plate 31, the positioning hole 41 is located at the front end of the support plate 31, and a reinforcing strip 33 is provided between the inner side of the support plate 31 and the bottom plate 22.

[0039] The thickness of the arc-shaped positioning is consistent with the thickness of the mounting piece 14 on the inner side plate 12.

[0040] The top block 6 is adjustablely mounted on the base 2, and the lower surfaces of the left and right boxes 11 can be kept horizontal by adjusting the height of the top block 6.

[0041] The square frame 21 has adjustable foot pads 8 at its four corners.

[0042] The working principle and usage method of a forklift frame welding assembly positioning fixture in this embodiment are as follows:

[0043] This embodiment provides a forklift frame welding assembly positioning fixture. The base 2 consists of a square frame 21 and a base plate 22. The base plate 22 is symmetrically arranged on the square frame 21, corresponding to the positions of the left and right housings 11, to support the left and right housings 11 and reduce the weight of the fixture. A reinforcing plate 7 is provided at the angle between the base plate 22 and the square frame 21 to reduce deformation under heavy load and improve the service life and stability of the fixture. The positioning support frame 3 consists of a support plate 31 and a reinforcing beam 32. The support plate 31 is symmetrically and parallelly arranged on the base 2, with a distance of 32mm from the left and right housings 11 of the forklift frame. The support plate 31 is designed with a limiting hole 311 at its upper end to match the lugs 13 on the inner side plates 12 of the left and right side plates 11 of the frame. By inserting positioning pins or other fasteners, the frame is accurately positioned in the vertical direction. The arc-shaped positioning piece 4 is set on the outer side of the support plate 31, and a positioning hole 41 is provided on it corresponding to the through hole 121 at the front end of the inner side plate 12. The through hole 121 and the positioning hole 41 are connected by positioning pins or other fasteners to ensure the frame is accurately positioned in the horizontal direction. The thickness of the arc-shaped positioning piece is the same as that of the inner side plate 12. The thickness of the mounting parts 14 on plate 12 is consistent, which not only ensures a tight fit between the arc-shaped positioning block and the inner plate 12, preventing loosening during welding, but also ensures that the space between the left and right boxes 11 remains constant, providing reserved space for the mounting parts 14. This ensures that other components on the mounting parts 14 can be smoothly assembled later on the base frame 1, improving production efficiency. The base 2 is equipped with several top blocks 6 through an adjustment device, and the height of the top blocks 6 can be adjusted to accommodate the bottom of the box with different height differences, ensuring that the frame remains level during welding and avoiding welding quality problems caused by vibration. The inner side plates 12 of the left and right box bodies 11 are precisely positioned using triple positioning via positioning holes 41, limiting holes 311, and the base plate 22. Limiting blocks 5 are installed on the base 2 on one side of the tail end of the left and right box bodies 11, and their fit with the tail end plates of the left and right box bodies 11 via limiting holes 311 prevents the tail ends from shaking during welding. Adjustable foot pads 8 are provided at the four corners of the square frame 21. By replacing foot pads 8 with different thicknesses, the height of the foot pads 8 can be adjusted to ensure the horizontal stability of the base 2, preventing tooling tilting due to uneven ground and improving welding quality. This design is suitable for different ground conditions, increasing the applicability of the tooling and ensuring stability and reliability in various environments.

[0044] When using the forklift, place the fixture on a flat surface. Adjust the foot pads 8 to ensure the base 2 is level and stable. Use a spirit level to check and adjust the height of the foot pads 8 to ensure the base 2 is completely level. Check that all positioning holes 41, limit holes 311, and limit blocks 5 are intact and functioning properly. Check that the top block 6 can be freely adjusted in height. Check that all fasteners (such as positioning pins) are complete and intact. Then, place the left and right boxes 11 of the forklift frame on the base 2. The left and right boxes 11 should be placed on both sides of the base plate 22, corresponding to the sides of the positioning support beam. Measure the height difference between the bottom of the left and right boxes 11 and the bottom surface of the front guard plate. Adjust the height of the top block 6 using the adjustment device to support the bottom of the left and right boxes 11. Make sure the through hole 121 of the ear 13 on the inner side plate 12 of the limiting hole 311 is coaxially set, and the positioning hole 41 is coaxially set with the through hole 121 at the front end of the inner side plate 12. Insert positioning pins into the positioning hole 41 and the limiting hole 311 to ensure that the inner side plates 12 of the left and right boxes 11 will not move in the lateral and horizontal directions. Check again whether all positioning pins are firmly inserted to ensure that the frame is accurately positioned in all directions. After ensuring that all parts of the frame are accurately positioned, start the welding operation. During the welding process, pay attention to the stability of the frame to ensure the welding quality. After the welding is completed, use the fixing effect of the positioning fixture on the base frame 1 to install the top guard on the base frame 1. Finally, remove all positioning pins and limiting blocks 5 to ensure that the frame can be smoothly removed from the fixture.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of this utility model and is used only to illustrate the technical solution of this utility model, and is not intended to limit the protection scope of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the protection scope of this utility model.

[0046] In the description of this utility model, it should be understood that the terms "upper", "lower", "upper end", "lower end", "upper surface", "lower surface", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A forklift frame welding assembly positioning fixture, comprising: The base (2), positioning support frame (3), and arc-shaped positioning component (4) are characterized in that: The positioning support frame (3) includes a support plate (31) and a reinforcing beam (32). The support plate (31) is symmetrically and parallelly arranged on the base (2) and is set according to the distance between the left and right boxes (11) of the frame. The upper end of the support plate (31) is provided with a limiting hole (311) corresponding to the ear (13) on the inner side plate (12) of the left and right boxes (11). The two ends of the reinforcing beam (32) are respectively connected to the corresponding support plate (31). The arc-shaped positioning block is set on the outer side of the support plate (31) and is provided with a positioning hole (41) corresponding to the through hole (121) at the front end of the inner side plate (12). The end of the base (2) away from the positioning support frame (3) is provided with a limiting block (5) corresponding to the end plate of the left and right boxes (11). The base (2) between the limiting block (5) and the support plate (31) is provided with a number of top blocks (6) for supporting the bottom of the left and right boxes (11).

2. The forklift frame welding assembly positioning fixture as described in claim 1, characterized in that: The base (2) includes a square frame (21) and a base plate (22). The base plate (22) is symmetrically arranged on the square frame (21) and is respectively arranged on the two sides above the square frame (21) corresponding to the left and right boxes (11).

3. The forklift frame welding assembly positioning fixture as described in claim 2, characterized in that: A reinforcing plate (7) is provided at intervals at the angle between the lower surface of the base plate (22) and the side of the square frame (21).

4. The forklift frame welding assembly positioning fixture as described in claim 2, characterized in that: The support plate (31) is shaped like a "7" and its upper end is arc-shaped. The limiting hole (311) is located at the upper end of the support plate (31), the positioning hole (41) is located at the front end of the support plate (31), and a reinforcing strip (33) is provided between the inner side of the support plate (31) and the bottom plate (22).

5. The forklift frame welding assembly positioning fixture as described in claim 1, characterized in that: The thickness of the arc-shaped positioning is consistent with the thickness of the mounting part (14) on the inner side plate (12).

6. The forklift frame welding assembly positioning fixture as described in claim 1, characterized in that: The top block (6) is adjustablely mounted on the base (2), and the lower surfaces of the left and right boxes (11) can be kept horizontal by adjusting the height of the top block (6).

7. The forklift frame welding assembly positioning fixture as described in claim 2, characterized in that: The square frame (21) has adjustable foot pads (8) at its four corners.

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