Welding and positioning device for inner portal stand column of forklift

Abstract

The utility model relates to a forklift inner portal stand column welding positioning device which comprises a bottom plate, a positioning assembly, a driven assembly and an air cylinder. The bottom plate is rectangular, positioning assemblies are arranged at the top of the bottom plate close to the two ends, an air cylinder is arranged on the top face close to the other end of the bottom plate, the output end of the air cylinder is connected with a driven assembly, and the driven assembly is arranged on the top face of the bottom plate between the positioning assemblies. Compared with an inner cavity positioning mode, an outer width positioning mode is adopted for the inner door frame stand column, so that the matching error of the inner door frame stand column and the outer door frame caused by the manufacturing error of the inner door frame stand column can be eliminated; a driving source of the double-acting air cylinder is adopted, the positioned stand column is automatically clamped and loosened, and therefore the forklift inner portal stand column positioning device is high in automation degree, simple in structure and reliable in performance and can be widely applied to welding tool design.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, and in particular to a welding positioning device for the mast column of a forklift. Background Technology

[0002] Currently, in the construction machinery industry, welding fixtures have been widely promoted and applied to ensure product welding quality. This is because they can precisely guarantee the dimensional stability of products, reduce human error, and greatly improve production efficiency. The forklift inner mast upright is one of the core components of the forklift mast system, directly affecting the lifting performance, stability, and safety of the forklift. Therefore, welding forklift inner mast uprights requires high precision in its outer width dimensions. Furthermore, because the channel steel used for the upright itself has a certain thickness tolerance, and most inner masts currently use internal cavity positioning during welding, manufacturing errors in the upright itself persist, even affecting its fit with the forklift outer mast and resulting in a short mast lifespan. Therefore, there is an urgent need for a method to solve the problem of mast fit errors caused by the upright's inherent thickness. Considering the characteristics of the forklift industry, where frontline production workers experience high labor intensity, improving the automation of tooling during production is highly necessary. Utility Model Content

[0003] To address the issue of large manufacturing errors in the uprights due to the use of internal cavity positioning during welding of existing internal masts, a welding positioning device for forklift internal mast uprights is proposed.

[0004] The technical solution of this utility model is: a welding and positioning device for the mast column of a forklift, including a base plate, a positioning component, a driven component, and a cylinder; the base plate is rectangular, and a positioning component is provided on the top of the base plate near both ends, and a cylinder is provided on the top surface near the other end of the base plate, the output end of the cylinder is connected to the driven component, and the driven component is located on the top surface of the base plate between the positioning components.

[0005] Preferably, the driven component includes a first guide rail and a second guide rail, which are fixedly connected to the top of the base plate. The first guide rail is located near the cylinder, and its axis is in the same vertical plane as the cylinder's axis. Two second guide rails are provided, one on each side of the first guide rail, and their axes are perpendicular to the first guide rail's axis. The first guide rail is slidably connected to a direction conversion seat, and the second guide rail is slidably connected to a column clamping seat. The end of the column clamping seat away from the direction conversion seat abuts against the side of the inner gantry column. A push-pull pin is fixedly connected to the top of the direction conversion seat near the cylinder, and the end of the push-pull pin away from the direction conversion seat is fixedly connected to the cylinder's output end. Two connecting plates are rotatably connected to the top of the direction conversion seat away from the push-pull pin, and the end of the connecting plates away from the direction conversion seat is rotatably connected to the column clamping seat.

[0006] Preferably, the connecting plate is rotatably connected to the direction conversion seat and the column clamping seat via a rotating shaft.

[0007] Preferably, the cylinder has a cylinder seat at the bottom, and the cylinder is connected to the base plate through the cylinder seat.

[0008] Preferably, the positioning component includes a column positioning seat and a column raising seat. The column raising seat is located on the side of the column positioning seat away from the outermost end of the base plate. The inner gantry column is placed on the column raising seat. The side of the column positioning seat near the column raising seat abuts against the side of the inner gantry column away from the column clamping seat.

[0009] The beneficial effects of this utility model are as follows: the external width positioning method of the inner mast column, compared with the internal cavity positioning method, can eliminate the matching error between the inner mast column and the outer mast caused by the manufacturing error of the inner mast column itself; the use of a reciprocating cylinder as the driving source automatically clamps and releases the positioned column, thus forming a forklift inner mast column positioning device with a high degree of automation, simple structure and reliable performance, which can be widely used in welding tooling design. Attached Figure Description

[0010] Figure 1 This is a perspective view of the welding and positioning device for the inner mast column of the forklift according to this utility model;

[0011] Figure 2 This is a perspective view of the push-pull pin of this utility model.

[0012] The component names corresponding to the various reference numerals in the diagram are as follows:

[0013] 1. Base plate; 2. Positioning assembly; 21. Column positioning seat; 22. Column elevation seat; 3. Driven assembly; 31. First guide rail; 32. Second guide rail; 33. Column clamping seat; 34. Direction conversion seat; 35. Connecting plate; 36. Push-pull pin; 37. Rotating shaft; 4. Cylinder; 41. Cylinder seat; 5. Inner mast column. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0015] refer to Figure 1As shown in the figure, this application discloses a welding and positioning device for a forklift inner mast column, including a base plate 1, a positioning assembly 2, a driven assembly 3, and a cylinder 4. The base plate 1 is rectangular, and the positioning assembly 2 is located on the top of the base plate 1 near both ends. The cylinder 4 is located on the top surface near the other end of the base plate 1. The piston of the cylinder 4 is connected to the driven assembly 3, which is located on the top surface of the base plate 1 between the positioning assemblies 2. The inner mast column 5 is placed on the positioning assembly 2, and the cylinder 4 provides power so that the driven assembly 3 clamps and releases the inner mast column 5.

[0016] The driven assembly 3 includes a first guide rail 31 and a second guide rail 32, which are fixedly connected to the top of the base plate 1 by bolts. The first guide rail 31 is located near the cylinder 4, and the axes of the first guide rail 31 and the cylinder 4 are in the same vertical plane. There are two second guide rails 32, located on both sides of the first guide rail 31, and the axes of the second guide rails 32 are perpendicular to the axes of the first guide rail 31. The first guide rail 31 is slidably connected to the direction conversion seat 34 via a slider, and the second guide rail 32 is slidably connected to the column clamping seat 33 via a slider. The end of the column clamping seat 33 away from the direction conversion seat 34 is connected to the inner gantry column 5. The direction conversion seat 34 is fixedly connected to the top of the cylinder 4 end by a push-pull pin 36. In this example, one end of the push-pull pin 36 is a step, and the direction conversion seat 34 has a groove. The step on the push-pull pin 36 is connected to the groove on the direction conversion seat 34, so that the push-pull pin 36 can push or pull the direction conversion seat 34. The end of the push-pull pin 36 away from the direction conversion seat 34 is fixedly connected to the piston cylinder of the cylinder 4. The top of the end of the direction conversion seat 34 away from the push-pull pin 36 is rotatably connected to two connecting plates 35 at two corners. The end of the connecting plate 35 away from the direction conversion seat 34 is rotatably connected to the column clamping seat 33.

[0017] refer to Figure 1 , 2 As shown, the connecting plate 35 is rotatably connected to the direction conversion seat 34 and the column clamping seat 33 via the rotating shaft 37.

[0018] The cylinder 4 has a cylinder seat 41 at the bottom, and the cylinder 4 is connected to the base plate 1 through the cylinder seat 41. The cylinder seat 41 is fixedly connected to the base plate 1 by bolts.

[0019] The positioning component 2 includes a column positioning seat 21 and a column raising seat 22. The column raising seat 22 is located on the side of the column positioning seat 21 away from the outermost end of the base plate 1. In this example, there are two column raising seats 22 in each group of positioning components 2, located on both sides of one end of the column positioning seat 21. The column positioning seat 21 and the column raising seat 22 form a triangular structure. The inner gantry column 5 is placed on the column raising seat 22. The side of the column positioning seat 21 near the column raising seat 22 abuts against the side of the inner gantry column 5 away from the column clamping seat 33.

[0020] The column positioning seat 21 and the column raising seat 22 are fixedly connected to the base plate by bolts.

[0021] The specific working method is as follows: First, the inner mast column 5 is positioned horizontally and vertically using the column positioning seat 21 and the column raising seat 22. After positioning, the control valve of cylinder 4 is activated. The piston rod of cylinder 4 pulls the push-pull pin 36, which in turn pulls the direction conversion seat 34 to move linearly along the first guide rail 31. The direction conversion seat 34, through the rotating shaft 37 and the connecting plate 35, links the column clamping seat 33. Under the linkage of the direction conversion seat 34, the column clamping seat 33 moves linearly along the second guide rail 32, thereby clamping the inner cavity of the forklift inner mast column 5. After welding, the control valve of cylinder 4 is adjusted. The piston rod of cylinder 4 pushes the push-pull pin 36, which in turn pushes the direction conversion seat 34. The direction conversion seat 34, through the rotating shaft 37 and the connecting plate 35, causes the column clamping seat 33 to release the inner mast column 5, allowing the inner mast column 5 to be removed.

[0022] The beneficial effects are as follows: The external width positioning method of the inner mast column 5, compared with the internal cavity positioning method, can eliminate the matching error between the inner mast column 5 and the outer mast caused by the manufacturing error of the inner mast column 5 itself; the drive source of the reciprocating cylinder 4 is adopted to automatically clamp and release the positioned column, thus forming a forklift inner mast column 5 positioning device with a high degree of automation, simple structure and reliable performance, which can be widely used in welding tooling design.

[0023] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used 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. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A welding and positioning device for the inner mast column of a forklift, characterized in that, It includes a base plate (1), a positioning component (2), a driven component (3), and a cylinder (4); the base plate (1) is rectangular, and a positioning component (2) is provided on the top of the base plate (1) near both ends, and a cylinder (4) is provided on the top surface near the other end of the base plate (1). The output end of the cylinder (4) is connected to the driven component (3), and the driven component (3) is located on the top surface of the base plate (1) between the positioning components (2).

2. The forklift inner mast column welding positioning device according to claim 1, characterized in that, The driven component (3) includes a first guide rail (31) and a second guide rail (32). The first guide rail (31) and the second guide rail (32) are fixedly connected to the top of the base plate (1). The first guide rail (31) is located near the cylinder (4), and the axes of the first guide rail (31) and the cylinder (4) are in the same vertical plane. There are two second guide rails (32), which are respectively located on both sides of the first guide rail (31). The axis of the second guide rail (32) is perpendicular to the axis of the first guide rail (31). The first guide rail (31) is slidably connected to the direction conversion seat (34), and the second guide rail (32) is slidably connected to the direction conversion seat (34). The column clamping seat (33) is connected to the side of the inner gantry column (5) at one end away from the direction conversion seat (34). The top of the direction conversion seat (34) near the cylinder (4) is fixedly connected to the push-pull pin (36). The end of the push-pull pin (36) away from the direction conversion seat (34) is fixedly connected to the output end of the cylinder (4). The top of the direction conversion seat (34) away from the push-pull pin (36) is rotatably connected to two connecting plates (35). The end of the connecting plate (35) away from the direction conversion seat (34) is rotatably connected to the column clamping seat (33).

3. The forklift inner mast column welding positioning device according to claim 2, characterized in that, The connecting plate (35) is rotatably connected to the direction conversion seat (34) and the column clamping seat (33) respectively via the rotating shaft (37).

4. The forklift inner mast column welding positioning device according to claim 1, characterized in that, The cylinder (4) is provided with a cylinder seat (41) at the bottom, and the cylinder (4) is connected to the base plate (1) through the cylinder seat (41).

5. The forklift inner mast column welding positioning device according to claim 2, characterized in that, The positioning component (2) includes a column positioning seat (21) and a column elevation seat (22). The column elevation seat (22) is located on the side of the column positioning seat (21) away from the outermost end of the base plate (1). The inner gantry column (5) is placed on the column elevation seat (22). The side of the column positioning seat (21) close to the column elevation seat (22) abuts against the side of the inner gantry column (5) away from the column clamping seat (33).

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