Scissor forklift lifting arm

Abstract

The utility model discloses a scissor forklift lifting arm which comprises a lifting arm body, a square installation groove is formed in the lifting arm body, a connecting shaft is movably arranged in the square installation groove, the connecting shaft comprises a square clamping shaft, a limiting baffle and a hinge hole, the square clamping shaft is matched with the square installation groove, and the limiting baffle is matched with the hinge hole. The limiting baffle is located at one end of the square clamping shaft, the lifting arm is connected to the surface of the square clamping shaft in a clamped mode through the upper clamping ring and the lower clamping ring, and the upper clamping ring and the lower clamping ring are connected with the square clamping shaft in a sliding mode. The square mounting groove is formed in the surface of the lifting arm, the square clamping shaft is arranged on the surface of the connecting shaft, the square mounting groove in the lifting arm is inserted into the surface of the square clamping shaft in a penetrating mode, then the lifting arm is clamped through the upper clamping ring and the lower clamping ring, the coaxiality requirement is met, and meanwhile maintenance and disassembly are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field related to scissor lift trucks, and in particular relates to a lifting arm of a scissor lift truck. Background Art

[0002] In the working process of the scissor lift truck, the lifting arm plays a vital role. In the existing technical solutions, the connecting shaft is usually installed at the specific position of the left and right lifting arms, and then the hinge holes are processed at the upper and lower ends of the connecting shaft using a double-head boring machine to ensure that the hinge holes on the left and right sides of the connecting shaft meet the coaxiality standard. However, this single-structure processing method has some problems, such as high cost, slow on-site workpiece flow speed, and inability to achieve large-scale production.

[0003] Therefore, the patent with authorization announcement number CN213294561U discloses a scissor lift arm, which not only ensures the coaxiality requirement between the two hinge holes, but also does not need to be processed again after welding, thereby increasing mass production efficiency and reducing production costs.

[0004] However, the lifting arm of the scissor lift truck in the above patent is processed and fixed by welding, which is inconvenient for subsequent disassembly and maintenance; at the same time, during long-term use, the hinge hole and the lifting arm are prone to wear and there is a lack of effective lubrication measures, resulting in poor rotation and affecting the lifting efficiency; therefore, the utility model proposes a lifting arm of a scissor lift truck. Utility Model Content

[0005] The utility model aims to provide a lifting arm of a scissor lift truck to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lifting arm of a scissor lift truck, comprising a lifting arm, a square mounting groove is provided on the lifting arm, a connecting shaft is movably arranged in the square mounting groove, the connecting shaft comprises a square clamping shaft, a limit baffle and a hinge hole, the square clamping shaft is adapted to the square mounting groove, the limit baffle is located at one end of the square clamping shaft, the lifting arm is clamped to the surface of the square clamping shaft by an upper clamping ring and a lower clamping ring, and the upper clamping ring and the lower clamping ring are slidably connected to the square clamping shaft.

[0007] Furthermore, the upper clamping ring is provided with a positioning hole and an upper hinge rod, the lower clamping ring is provided with a positioning slide column, a return spring and a lower hinge rod, the positioning slide column cooperates with the positioning hole, and the return spring is sleeved on the surface of the positioning slide column.

[0008] Furthermore, the upper clamping ring is rotatably connected to the upper hinged rod, the other end of the upper hinged rod is rotated on the surface of the pressure plate, the lower clamping ring is rotatably connected to the lower hinged rod, the other end of the lower hinged rod is rotated on the surface of the pressure plate, the surface of the pressure plate is fixedly connected to a liquid reservoir, and the surface of the liquid reservoir is provided with a compression belt and a nozzle.

[0009] Furthermore, the shape and size of the square mounting groove match the square clamping shaft to ensure the stability and accuracy of the installation between the connecting shaft and the lifting arm.

[0010] Furthermore, the upper clamping ring, the lower clamping ring, the pressure plate and the liquid reservoir are all arranged inside the square clamping shaft, occupying a small space; the liquid reservoir is filled with lubricating liquid.

[0011] Furthermore, the position and spraying direction of the spray head are designed to ensure that the lubricating liquid can be accurately and evenly sprayed onto the surface of the hinge hole during use.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model provides a square installation groove on the surface of the lifting arm, arranges a square clamping shaft on the surface of the connecting shaft, inserts the square installation groove in the lifting arm into the surface of the square clamping shaft, and then clamps the lifting arm through an upper clamping ring and a lower clamping ring, so that the coaxiality requirement is met and maintenance and disassembly are convenient.

[0014] 2. The utility model, when pressing the upper clamping ring and the lower clamping ring, squeezes the pressure plate toward the inside of the square clamping shaft through the upper hinged rod of the upper clamping ring and the lower clamping ring through the lower hinged rod, and then squeezes the reservoir through the pressure plate, and the compression belt in the reservoir is deformed and compressed, so that the lubricating oil inside the reservoir is sprayed onto the surface of the hinge hole through the nozzle; when another set of lifting arms is installed on the surface of the hinge hole, lubrication effect can be automatically provided, so that the scissor lift truck platform can be raised and lowered more smoothly, thereby improving the working efficiency of the scissor lift truck.

[0015] 3. The utility model limits the movement of the upper clamping ring and the lower clamping ring by inserting another set of lifting arms on the surface of the hinge hole, thereby preventing the upper clamping ring and the lower clamping ring from sliding during operation and affecting the stabilizing effect of the lifting arm on the surface of the square clamping shaft, thereby improving the working stability of the lifting arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the lifting arm structure of a scissor lift truck;

[0017] Figure 2 It is a schematic diagram of the connecting shaft structure;

[0018] Figure 3It is a schematic diagram of the internal structure of the square card shaft;

[0019] Figure 4 It is a schematic diagram of the motion relationship between the upper clamping ring and the lower clamping ring;

[0020] In the figure: 1. lifting arm; 2. square mounting groove; 3. connecting shaft; 31. square clamping shaft; 32. limit baffle; 33. hinge hole; 4. upper clamping ring; 41. positioning hole; 42. upper hinge rod; 5. lower clamping ring; 51. positioning slide column; 52. return spring; 53. lower hinge rod; 6. pressure plate; 7. liquid reservoir; 71. compression belt; 72. nozzle. DETAILED DESCRIPTION

[0021] In the prior art, the lifting arm of the scissor lift truck is fixed by welding, which makes it inconvenient to disassemble and maintain it later. In addition, during long-term use, the hinge hole and the lifting arm are easily worn and lack effective lubrication measures, resulting in poor rotation and affecting the lifting efficiency.

[0022] Therefore, the present invention proposes a lifting arm of a scissor lift truck, including a lifting arm 1, a square mounting groove 2 is opened on the lifting arm 1, a connecting shaft 3 is movably arranged in the square mounting groove 2, the connecting shaft 3 includes a square clamping shaft 31, a limit baffle 32 and a hinge hole 33, the square clamping shaft 31 is adapted to the square mounting groove 2, can ensure the stability of the connection, avoid shaking or displacement during the lifting process, and ensure the safety and reliability of the lifting operation; the limit baffle 32 is located at one end of the square clamping shaft 31, the limit baffle 32 can effectively prevent the connecting shaft 3 from being excessively inserted into the square mounting groove 2, and plays a role in precise positioning and protecting the structure; the lifting arm 1 is clamped on the surface of the square clamping shaft 31 through the upper clamping ring 4 and the lower clamping ring 5, and the upper clamping ring 4 and the lower clamping ring 5 are slidably connected to the square clamping shaft 31.

[0023] The upper clamping ring 4 is provided with a positioning hole 41 and an upper hinge rod 42, and the lower clamping ring 5 is provided with a positioning slide column 51, a return spring 52 and a lower hinge rod 53. The positioning slide column 51 cooperates with the positioning hole 41 to make the clamping more stable and reliable; the return spring 52 is sleeved on the surface of the positioning slide column 51.

[0024] The upper clamping ring 4 is rotatably connected to the upper hinged rod 42, the other end of the upper hinged rod 42 is rotated on the surface of the pressure plate 6, the lower clamping ring 5 is rotatably connected to the lower hinged rod 53, the other end of the lower hinged rod 53 is rotated on the surface of the pressure plate 6, the surface of the pressure plate 6 is fixedly connected with a liquid reservoir 7, and the surface of the liquid reservoir 7 is provided with a compression belt 71 and a nozzle 72.

[0025] The shape and size of the square mounting groove 2 match the square clamping shaft 31 to ensure the stability and accuracy of the installation between the connecting shaft 3 and the lifting arm 1.

[0026] The upper clamping ring 4, the lower clamping ring 5, the pressing plate 6 and the liquid reservoir 7 are all arranged inside the square clamping shaft 31, occupying a small space; the liquid reservoir 7 is filled with lubricating liquid.

[0027] The position and spray direction of the spray head 72 are designed to ensure that the lubricating liquid can be accurately and evenly sprayed onto the surface of the hinge hole 33 during use.

[0028] The working principle and use process of the utility model are as follows: a square installation groove 2 is opened on the surface of the lifting arm 1, a square clamping shaft 31 is arranged on the surface of the connecting shaft 3, the square installation groove 2 in the lifting arm 1 is inserted into the surface of the square clamping shaft 31, and the lifting arm 1 is clamped by an upper clamping ring 4 and a lower clamping ring 5, so that the coaxiality requirement is met and maintenance and disassembly are convenient.

[0029] During the installation of the lifting arm 1, it is necessary to first press the upper clamping ring 4 and the lower clamping ring 5, so that the lifting arm 1 is inserted into the surface of the square clamping shaft 31. After the insertion is completed, the upper clamping ring 4 and the lower clamping ring 5 are reset by the reset spring 52 to clamp the lifting arm 1;

[0030] At the same time, when the upper clamping ring 4 and the lower clamping ring 5 are pressed, the upper clamping ring 4 squeezes the pressure plate 6 toward the inner side of the square clamping shaft 31 through the upper hinge rod 42 and the lower clamping ring 5 squeezes the pressure plate 6 through the lower hinge rod 53, and then squeezes the liquid reservoir 7 through the pressure plate 6, and the compression belt 71 in the liquid reservoir 7 is deformed and compressed, so that the lubricating oil inside the liquid reservoir is sprayed onto the surface of the hinge hole 33 through the nozzle 72; when another set of lifting arms 1 is installed on the surface of the hinge hole 33, a lubrication effect can be automatically provided, so that the scissor lift platform can be more comfortable during the lifting process, thereby improving the working efficiency of the scissor lift.

[0031] When another set of lifting arms 1 is inserted into the surface of the hinge hole 33, the movement of the upper clamping ring 4 and the lower clamping ring 5 is limited by the other set of lifting arms 1 to prevent the upper clamping ring 4 and the lower clamping ring 5 from sliding during operation and affecting the stabilizing effect of the lifting arm 1 on the surface of the square clamping shaft 31, thereby improving the working stability of the lifting arm 1.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A scissor lift arm, comprising a lift arm (1), characterized in that: The lifting arm (1) is provided with a square mounting groove (2), a connecting shaft (3) is movably arranged in the square mounting groove (2), the connecting shaft (3) comprises a square clamping shaft (31), a limit baffle (32) and a hinge hole (33), the square clamping shaft (31) is adapted to the square mounting groove (2), the limit baffle (32) is located at one end of the square clamping shaft (31), the lifting arm (1) is clamped on the surface of the square clamping shaft (31) through an upper clamping ring (4) and a lower clamping ring (5), and the upper clamping ring (4) and the lower clamping ring (5) are slidably connected to the square clamping shaft (31).

2. A scissor lift arm according to claim 1, characterized in that: The upper clamping ring (4) is provided with a positioning hole (41) and an upper hinge rod (42), and the lower clamping ring (5) is provided with a positioning slide column (51), a return spring (52) and a lower hinge rod (53). The positioning slide column (51) matches the positioning hole (41), and the return spring (52) is sleeved on the surface of the positioning slide column (51).

3. A scissor lift arm according to claim 2, characterized in that: The upper clamping ring (4) is rotatably connected to the upper hinge rod (42), the other end of the upper hinge rod (42) is rotated on the surface of the pressure plate (6), the lower clamping ring (5) is rotatably connected to the lower hinge rod (53), the other end of the lower hinge rod (53) is rotated on the surface of the pressure plate (6), the surface of the pressure plate (6) is fixedly connected with a liquid reservoir (7), and the surface of the liquid reservoir (7) is provided with a compression belt (71) and a nozzle (72).

4. A scissor lift arm according to claim 1, characterized in that: The shape and size of the square installation groove (2) match the square clamping shaft (31) to ensure the stability and accuracy of the installation between the connecting shaft (3) and the lifting arm (1).

5. The scissor lift arm according to claim 1, characterized in that: The upper clamping ring (4), the lower clamping ring (5), the pressing plate (6) and the liquid storage container (7) are all arranged inside the square clamping shaft (31), occupying a small space.

6. A scissor lift arm according to claim 3, characterized in that: The reservoir (7) is filled with lubricating liquid, and the position and spraying direction of the spray head (72) are designed to ensure that the lubricating liquid can be accurately and evenly sprayed onto the surface of the hinge hole (33) during use.

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