Limiting device for lifting oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a lifting oil cylinder limiting device which comprises a mounting table fixed on left and right channel steel wing plates of an outer portal frame of a forklift and a cylinder barrel for connecting a lifting oil cylinder and a mounting bracket of the mounting table, the lifting oil cylinder limiting device can effectively prevent the lifting oil cylinder from rotating under the action of radial force in the working process.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a lifting oil cylinder limiting device. Background Art

[0002] Lifting cylinders are mostly used in engineering equipment such as forklifts and truck cranes. When the forklift is loading and unloading goods, the lifting cylinder will be subject to various forces as the gantry is lifted, including radial force. In the prior art, a mechanism is usually used to lock the cylinder barrel or fix it with bolts at the bottom of the cylinder barrel to prevent the cylinder barrel from translating or moving as a whole. However, they cannot effectively prevent the cylinder barrel from rotating due to the radial force. When the cylinder barrel of the lifting cylinder rotates due to the radial force, it will cause distortion and damage to the hydraulic pipeline. Utility Model Content

[0003] The purpose of the utility model is to overcome the problem in the prior art that the cylinder barrel of the lifting cylinder is prone to rotation during the lifting process of the gantry, which may cause twisting and damage to the hydraulic pipeline, and to provide a lifting cylinder limit device, which can effectively prevent the cylinder barrel of the lifting cylinder from rotating due to radial force during the movement of the lifting cylinder.

[0004] In order to achieve the above purpose, the utility model provides a lifting cylinder limiting device, including a mounting platform fixed on the left and right channel steel wing plates of the forklift outer frame and a mounting bracket for connecting the cylinder barrel of the lifting cylinder and the mounting platform.

[0005] Optionally, the mounting bracket includes a first mounting plate and a second mounting plate connected to one end of the first mounting plate, the first mounting plate is connected and fixed to the outer wall of the cylinder barrel of the lifting cylinder, and the second mounting plate is connected and fixed to the mounting platform.

[0006] Optionally, the outer wall of the cylinder is provided with a limit pin perpendicular to the outer wall of the cylinder, and the first mounting plate is provided with a U-shaped groove corresponding to the limit pin.

[0007] Optionally, the outer wall of the limiting pin is provided with an annular groove which is cut into and fitted with the U-shaped groove.

[0008] Optionally, a first mounting hole is further provided on the first mounting plate, and the mounting bracket further includes a limit screw and a locking nut, and the limit screw and the locking nut cooperate with the first mounting hole to lock and fix the first mounting plate to the outer wall of the cylinder.

[0009] Optionally, an adjustment gasket is provided at the gap formed after the annular groove and the U-shaped groove are cut into and assembled.

[0010] Optionally, a second mounting hole is provided on the second mounting plate, and the mounting bracket further comprises a combination bolt, and the combination bolt cooperates with the second mounting hole to lock and fix the second mounting plate on the mounting platform.

[0011] Optionally, a plurality of the second mounting holes and a plurality of the combination bolts are provided, and the plurality of the combination bolts cooperate with the plurality of the second mounting holes to lock and fix the second mounting plate on the mounting platform.

[0012] Through the above technical scheme, a mounting platform is set on the left and right channel steel wing plates of the forklift outer frame to fix the mounting bracket connected to the cylinder barrel of the lifting cylinder, thereby realizing the cylinder barrel rotation limiting function of the lifting cylinder. The lifting cylinder limiting device can effectively prevent the lifting cylinder from rotating under the action of radial force during work. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the installation of a lifting cylinder limit device provided by the utility model;

[0014] Figure 2 It is an enlarged schematic diagram of the structure of a lifting cylinder limit device provided by the utility model;

[0015] Figure 3 It is a schematic diagram of the mounting bracket structure of the utility model.

[0016] Description of Reference Numerals

[0017] 1. Mounting table; 2. Mounting bracket; 21. First mounting plate; 211. U-shaped groove; 212. First mounting hole; 22. Second mounting plate; 221. Second mounting hole; 3. Limit pin; 31. Annular groove; 4. Limit screw; 5. Lock nut; 6. Adjusting gasket; 7. Combination bolt; 10. Channel steel wing plate; 20. Lifting cylinder. DETAILED DESCRIPTION

[0018] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0019] The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0020] like Figure 1As shown, the utility model provides a lifting cylinder limiting device, including a mounting platform 1 fixed on the left and right channel steel wing plates 10 of the forklift outer frame and a mounting bracket 2 for connecting the cylinder barrel of the lifting cylinder 20 and the mounting platform 1.

[0021] In the technical solution provided by the utility model, the cylinder barrel of the lifting oil cylinder 20 is fixed on the mounting platform 1 by the mounting bracket 2, thereby achieving the fixing of the cylinder barrel of the lifting oil cylinder 20. It can effectively prevent the cylinder barrel of the lifting oil cylinder 20 from rotating due to the radial force when the lifting oil cylinder 20 is lifted with the forklift mast, thereby avoiding the distortion and damage of the hydraulic pipeline caused by the rotation of the cylinder barrel of the lifting oil cylinder 20.

[0022] It is understandable that when the design begins, the position of the mounting platform 1 can be preset according to the structure of the forklift outer mast assembly, so as to avoid other facilities on the forklift mast, such as the area for installing a protective glass cover. The installation and fixing method of the cylinder barrel of the lifting cylinder 20 can adopt any appropriate form, mainly to be able to stably and reliably fix the cylinder barrel to the left and right channel steel wing plates 10 of the forklift outer mast, so that it is not subject to the influence of radial force and can rotate. The connection between the mounting platform 1 and the left and right channel steel wing plates 10 of the forklift outer mast can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, for example, the mounting platform 1 can be welded to the left and right channel steel wing plates of the forklift outer mast. The connection between the mounting platform 1 and the mounting bracket 2 can be a fixed connection, a detachable connection, a direct connection, or an indirect connection through an intermediate medium.

[0023] In the present utility model, combined with Figure 1 , Figure 2 and Figure 3 As shown, in a specific embodiment of the present utility model, the mounting bracket 2 includes a first mounting plate 21 and a second mounting plate 22 connected to one end of the first mounting plate 21, the first mounting plate 21 is connected and fixed to the outer wall of the cylinder barrel of the lifting cylinder 20, and the second mounting plate 22 is connected and fixed to the mounting platform 1.

[0024] It can be understood that the mounting bracket 2 can adopt any appropriate structural form, as long as the cylinder can be fixed to the mounting platform 1. The connection between the first mounting plate 21 and the second mounting plate 22 can be any appropriate connection method, such as an integrated connection. The mounting bracket 2 provided by the utility model has good disassembly ability and is easy to maintain.

[0025] In a specific solution, the outer wall of the cylinder is provided with a limit pin 3 which is perpendicular to the outer wall of the cylinder, and the first mounting plate 21 is provided with a U-shaped groove 211 which is installed corresponding to the limit pin 3. When the lifting cylinder 20 is working, the limit pin 3 and the U-shaped groove 211 provide additional positioning to ensure that the cylinder is always in the correct position, reducing the possibility of loosening or displacement caused by vibration or other external forces. The correct position of the cylinder can be ensured by simply inserting the limit pin 3 of the cylinder into the U-shaped groove 211, thereby simplifying the installation and maintenance process.

[0026] Furthermore, the outer wall of the limit pin 3 is provided with a circular groove 31 which is cut into and fitted with the U-shaped groove 211. The provision of the circular groove 31 can limit the rotation of the limit pin 3 in the U-shaped groove 211, ensure that the relative position between the limit pin 3 and the U-shaped groove 211 is fixed, further ensure the fixity of the cylinder, and make it easier for the limit pin 3 to align with the U-shaped groove 211 during installation, reduce the adjustment and placement during installation, and improve the installation efficiency.

[0027] Furthermore, an adjustment gasket 6 is provided at the gap formed by the annular groove 31 and the U-shaped groove 211 after being cut into and assembled. The function of the adjustment gasket 6 is mainly to ensure that the connection between the annular groove 31 and the U-shaped groove 211 is tight and correctly aligned. By adjusting the thickness or number of the gasket 6, the gap between the annular groove 31 and the U-shaped groove 211 can be fine-tuned, thereby ensuring that the connection between them is stable without loosening or offset, which helps to improve the stability and reliability of the device.

[0028] In some embodiments, the first mounting plate 21 is further provided with a first mounting hole 212, and the mounting bracket 2 further includes a limit screw 4 and a locking nut 5, and the limit screw 4 and the locking nut 5 cooperate with the first mounting hole 212 to lock and fix the first mounting plate 21 on the outer wall of the cylinder. The first mounting hole 212 can be of any appropriate type, preferably a waist-shaped hole, which is convenient for adjustment during installation. The limit screw 4 is screwed into the first mounting hole 212 and extends to the outer wall of the cylinder of the lifting cylinder 20, and then locked and fixed with the locking nut 5, which can increase the stability of the device.

[0029] In some embodiments, the second mounting plate 22 is provided with a second mounting hole 221, and the mounting bracket 2 further includes a combination bolt 7, and the combination bolt 7 cooperates with the second mounting hole 221 to lock and fix the second mounting plate 22 on the mounting platform 1. Specifically, a plurality of the second mounting holes 221 and the combination bolt 7 are provided, and a plurality of the combination bolts 7 cooperate with a plurality of the second mounting holes 221 to lock and fix the second mounting plate 22 on the mounting platform 1. By using a plurality of combination bolts 7 in conjunction with a plurality of second mounting holes 221, it can be ensured that the connection between the second mounting plate 22 and the mounting platform 1 is more firm and stable. This multi-point fixing design can disperse the area where the device is subjected to force, reduce the pressure on a single connection point, and effectively reduce the vibration and looseness of the device during use. Each connection point can provide additional support and fixation, thereby reducing the shaking and displacement that may occur during the operation of the device, and improving the stability and reliability of the device.

[0030] In summary, the utility model provides a lifting cylinder limit device, and the specific implementation method is as follows:

[0031] First, weld the mounting platform 1 to the left and right channel steel wing plates 10 of the forklift outer mast, and set a plurality of mounting holes on the mounting platform 1, and then install the second mounting plate 22 of the mounting bracket 2 on the mounting platform 1, and at the same time, cut into and fit the U-shaped groove 211 on the first mounting plate 21 connected to one end of the second mounting plate 22 and the annular groove 31 on the limit pin 3 vertically set on the outer wall of the cylinder barrel. After the position is adjusted, screw the limit screw 4 into the first mounting hole 212 on the first mounting plate 21 and extend it against the outer wall of the cylinder barrel of the lifting cylinder 20, and then use the locking nut 5 to lock and fix it. According to the assembly needs, the adjusting gasket 6 can be added to adjust the gap formed by the U-shaped groove 211 on the first mounting plate 21 and the annular groove 31 on the limit pin 3. After the above-mentioned installation and adjustment are completed, install the combination bolt 8 to lock and fix the mounting bracket 2.

[0032] The utility model provides a lifting cylinder limit device which can effectively prevent the cylinder barrel of the lifting cylinder 20 from rotating during the lifting operation, thereby realizing the rotation limit function of the lifting cylinder 20. Compared with the traditional installation method, the limit effect is good, the assembly and disassembly is convenient, the economy is applicable, and the versatility is strong.

[0033] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A lifting cylinder limit device, characterized in that: It comprises a mounting platform (1) fixed on the left and right channel steel wing plates (10) of the forklift outer door frame, and a mounting bracket (2) used for connecting the cylinder barrel of the lifting cylinder (20) and the mounting platform (1).

2. The lifting cylinder limiting device according to claim 1 is characterized in that: The mounting bracket (2) comprises a first mounting plate (21) and a second mounting plate (22) connected to one end of the first mounting plate (21), the first mounting plate (21) being connected and fixed to the outer wall of the cylinder barrel of the lifting cylinder (20), and the second mounting plate (22) being connected and fixed to the mounting platform (1).

3. The lifting cylinder limiting device according to claim 2 is characterized in that: The outer wall of the cylinder is provided with a limit pin (3) perpendicular to the outer wall of the cylinder, and the first mounting plate (21) is provided with a U-shaped groove (211) mounted corresponding to the limit pin (3).

4. The lifting cylinder limiting device according to claim 3 is characterized in that: The outer wall of the limiting pin shaft (3) is provided with an annular groove (31) which is cut into and fitted with the U-shaped groove (211).

5. The lifting cylinder limiting device according to claim 2, characterized in that: The first mounting plate (21) is also provided with a first mounting hole (212), and the mounting bracket (2) further comprises a limit screw (4) and a locking nut (5), wherein the limit screw (4) and the locking nut (5) cooperate with the first mounting hole (212) to lock and fix the first mounting plate (21) on the outer wall of the cylinder.

6. The lifting cylinder limiting device according to claim 4, characterized in that: An adjusting gasket (6) is provided at the gap formed after the annular groove (31) and the U-shaped groove (211) are cut into and assembled.

7. The lifting cylinder limiting device according to claim 2, characterized in that: The second mounting plate (22) is provided with a second mounting hole (221), and the mounting bracket (2) further comprises a combination bolt (7), wherein the combination bolt (7) cooperates with the second mounting hole (221) to lock and fix the second mounting plate (22) on the mounting platform (1).

8. The lifting cylinder limiting device according to claim 7, characterized in that: A plurality of the second mounting holes (221) and the combination bolts (7) are provided, and a plurality of the combination bolts (7) cooperate with a plurality of the second mounting holes (221) to lock and fix the second mounting plate (22) on the mounting platform (1).

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