Anti-rotation device for piston rod

Abstract

The utility model relates to the technical field of light-weight oil cylinders, and discloses a piston rod anti-rotation device which comprises a cylinder barrel and further comprises a piston rod body arranged on the inner side of the cylinder barrel, and a pin ring is arranged at one end of the piston rod body. The anti-rotation assemblies are arranged on the two sides of the pin ring, the anti-rotation assemblies comprise fixing discs arranged on the two sides of the pin ring, the anti-rotation assemblies are arranged to conveniently limit the moving track and prevent rotation in the moving process, the piston rod body is made to linearly stretch out and draw back along the guide groove through the limiting rod, the supporting frame, the guide groove and the like, and therefore the piston rod is convenient to move. The rotating degree of freedom of the supporting frame is restrained, unnecessary rotation of the supporting frame is prevented, the supporting frame can be conveniently and flexibly installed through the installation assembly, the supporting frame can be conveniently clamped and fixed through cooperation of a fixing plate, a positioning frame, a fastening frame, a fixing bolt and the like, and the supporting frame, a limiting rod and the like can be conveniently installed and disassembled; and the use flexibility is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of lightweight hydraulic cylinder technology, specifically to a piston rod anti-rotation device. Background Technology

[0002] Lightweight hydraulic cylinders, also known as light-duty hydraulic cylinders, are designed and applied primarily for light machinery and small engineering projects. They are characterized by their compact size, simple structure, and flexible operation, making them easy to install and maintain. They are widely used in home decoration, landscaping, and small machinery, playing an important role in various engineering applications.

[0003] A piston rod anti-rotation device for a hydraulic cylinder, patent application number 202222185870.3, utilizes a storage groove, a locking rod, a fastening clamp, and a rubber pad. Twisting the locking rod in the storage groove inside the locking frame causes the fastening clamp to press and lock the piston rod inside the locking frame, preventing the piston rod from rotating. However, in use, the fastening clamp locking the piston rod may restrict the extension and retraction of the piston rod, affecting its working efficiency and performance, and causing the hydraulic cylinder to malfunction. Furthermore, in some cases where the piston rod is limited, the anti-rotation mechanism uses a fixed connection installation method, which is inconvenient to disassemble and limits the flexibility of use. Utility Model Content

[0004] The purpose of this utility model is to provide a piston rod anti-rotation device to solve the problems of limited piston rod extension and retraction and restricted assembly and disassembly flexibility when limiting anti-rotation.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a piston rod anti-rotation device, comprising a cylinder, and further comprising:

[0006] A piston rod body is disposed inside the cylinder barrel, and a pin ring is provided at one end of the piston rod body;

[0007] An anti-rotation assembly is provided on both sides of the pin ring. The anti-rotation assembly includes a fixed plate on both sides of the pin ring, a limit rod is fixedly connected to one side of the fixed plate, and a support frame is provided on the outside of the limit rod.

[0008] An installation assembly is provided at one end of a support frame. The installation assembly includes a fixing plate at one end of the support frame. The fixing plate has an installation groove inside. A fastening frame to improve connection stability is provided inside the installation groove. A fixing bolt is provided on one side of the fastening frame.

[0009] Preferably, the support frame has a guide groove inside, the inner side of the guide groove is slidably connected to the outer side of the limiting rod, and one end of the limiting rod is threaded with an anti-detachment block.

[0010] Preferably, a connecting rod is fixedly connected to one side of the fastening frame, and the outer side of the fixing bolt is threadedly connected to the inside of the fixing plate.

[0011] Preferably, a positioning frame is fixedly connected to one side of the fixing plate, and a fixing block is provided on one side of the positioning frame.

[0012] Preferably, the positioning frame has bolts inside, and a cylinder head is fixedly connected to one side of the fixing block, with the inside of the cylinder head communicating with the inside of the cylinder barrel.

[0013] Preferably, the rear surface of the cylinder is provided with a cylinder bottom, the top of the cylinder is provided with an oil port, and a piston is provided at one end of the piston rod body.

[0014] Preferably, a sealing ring is provided on the outer side of the piston, and an O-ring is provided on the inner side of the piston.

[0015] Preferably, a dustproof ring is provided on the inner side of the cylinder, and a wear-resistant ring and a guide sleeve are provided on the outer side of the piston rod body.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This invention uses an anti-rotation component to easily limit the running trajectory and prevent rotation during operation. Through the use of a limit rod, support frame, and guide groove, the piston rod body moves linearly along the guide groove, constraining its rotational freedom and preventing unnecessary rotation. The installation component facilitates flexible installation of the support frame. With the cooperation of the fixing plate, positioning frame, fastening frame, and fixing bolt, the support frame can be clamped and fixed, making it easy to install and disassemble the support frame and limit rod, thus enhancing the flexibility of use. Attached Figure Description

[0018] Figure 1 A schematic diagram of a preferred embodiment of the piston rod anti-rotation device provided by this utility model;

[0019] Figure 2 A schematic diagram of the anti-rotation component structure provided by this utility model;

[0020] Figure 3 A schematic diagram of the installation component structure provided by this utility model;

[0021] Figure 4 A schematic diagram of the piston and dust seal structure provided by this utility model.

[0022] In the diagram: 1. Cylinder; 2. Piston rod body; 3. Pin ring; 4. Anti-rotation assembly; 41. Fixing plate; 42. Limiting rod; 43. Support frame; 5. Mounting assembly; 51. Fixing plate; 52. Mounting groove; 53. Fastening frame; 54. Fixing bolt; 6. Guide groove; 7. Anti-detachment block; 8. Connecting rod; 9. Positioning frame; 10. Fixing block; 11. Bolt; 12. Cylinder head; 13. Cylinder bottom; 14. Oil port; 15. Piston; 16. Sealing ring; 17. O-ring; 18. Dust seal; 19. Wear ring; 20. Guide sleeve. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1-4 As shown, a piston rod anti-rotation device includes a cylinder 1, a piston rod body 2 disposed inside the cylinder 1, and a pin ring 3 disposed at one end of the piston rod body 2; anti-rotation components 4 disposed on both sides of the pin ring 3, the anti-rotation components 4 including fixing discs 41 disposed on both sides of the pin ring 3, the fixing discs 41 being fixed and loosened to the pin ring 3 by screws for easy installation and disassembly, a limit rod 42 being fixedly connected to one side of the fixing discs 41, and a limit rod 42 being installed on one side of both fixing discs 41, with a support frame 43 disposed on the outer side of the limit rod 42, the two support frames 43 facilitating the respective anti-rotation of the piston rod. Two limiting rods 42 provide support; an installation component 5 is set at one end of the support frame 43. The installation component 5 includes a fixing plate 51 set at one end of the support frame 43. The fixing plate 51 has an installation groove 52 inside. The fixing plate 51 and the installation groove 52 facilitate the positioning of the installation position of one end of the support frame 43. A fastening frame 53 is set on the inner side of the installation groove 52 to improve the connection stability. A fixing bolt 54 is set on one side of the fastening frame 53. Through the cooperation of the fastening frame 53 and the fixing bolt 54, it is easy to control the movement of the fastening frame 53, so that the fastening frame 53 clamps one end of the support frame 43, realizing flexible installation.

[0025] refer to Figure 1 and Figure 2As shown, the support frame 43 has a guide groove 6 inside. The inner side of the guide groove 6 is slidably connected to the outer side of the limiting rod 42. Through the cooperation of the support frame 43 and the guide groove 6, the movement range of the limiting rod 42 is limited. With the connection of the fixed plate 41, the pin ring 3 can only move telescopically to prevent rotation and effectively prevent the piston rod body 2 from rotating. One end of the limiting rod 42 is threaded with an anti-detachment block 7. The anti-detachment block 7 effectively prevents the limiting rod 42 from detaching. At the same time, the threaded connection allows the limiting rod 42 to detach from the support frame 43 when disassembly is required.

[0026] refer to Figure 1 , Figure 3 and Figure 4 As shown, a connecting rod 8 is fixedly connected to one side of the fastening bracket 53. The outer side of the connecting rod 8 is slidably connected to the inside of the fixing plate 51. The two sets of connecting rods 8 facilitate the stability of the fastening bracket 53's movement. One side of the fastening bracket 53 is connected to one end of the fixing bolt 54 via a bearing. The outer side of the fixing bolt 54 is threadedly connected to the inside of the fixing plate 51, improving the self-locking and anti-loosening effect. The fixing bolt 54 facilitates the control of the fastening bracket 53's movement within the mounting groove 52, achieving locking and fixation. A positioning bracket 9 is fixedly connected to one side of the fixing plate 51. Two positioning brackets 9 support and fix the two fixing plates 51 respectively. A fixing block 10 is provided on one side of the positioning bracket 9. Bolts 11 are provided inside the positioning bracket 9. A cylinder head 12 is fixedly connected to one side of the fixing block 10. The two sets of fixing blocks 10 and bolts 11 on the outer side facilitate the installation and fixation of the positioning frame 9 and the cylinder head 12. The interior of the cylinder head 12 is connected to the interior of the cylinder barrel 1. The rear surface of the cylinder head 12 is fixedly connected to the front surface of the cylinder barrel 1, and the two are in a state of internal communication. The rear surface of the cylinder barrel 1 is provided with a cylinder bottom 13. The top of the cylinder barrel 1 is provided with an oil port 14. One end of the piston rod body 2 is provided with a piston 15. The outer side of the piston 15 is provided with a sealing ring 16, and the inner side of the piston 15 is provided with an O-ring 17. The inner side of the cylinder barrel 1 is provided with a dustproof ring 18. The outer side of the piston rod body 2 is provided with a wear-resistant ring 19 and a guide sleeve 20. The sealing effect is effectively improved by the sealing ring 16, O-ring 17, dustproof ring 18, wear-resistant ring 19 and guide sleeve 20, ensuring the normal operation of the oil cylinder.

[0027] Working principle: In use, the two sets of fixing blocks 10 and bolts 11 on the outer side of the cylinder head 12 facilitate the installation of the two positioning brackets 9 on the cylinder head 12, thereby supporting and stabilizing the two fixing plates 51. One end of the support bracket 43 is inserted between the mounting groove 52 and the fastening bracket 53 through the rear side of the fixing plate 51. At the same time, the fastening bracket 53 supports the support bracket 43 and pulls the support bracket 43 to move. The extension length of the support bracket 43 is adjusted according to the stroke of the piston rod body 2. After determining the required position, the fixing bolt 54 is rotated, causing the fixing bolt 54 to drive the fastening bracket 53 and the support bracket 43 into the mounting groove 52. The piston rod moves to one side and, with the cooperation of the fixing plate 51, clamps and fixes the support frame 43, enabling flexible installation and disassembly of the support frame 43 and enhancing its flexibility of use. The two limiting rods 42 are inserted into the guide grooves 6 of the two support frames 43 respectively, and the anti-detachment block 7 is tightened. The two fixing plates 41 are installed on both sides of the pin ring 3 by screws, thereby connecting the pin ring 3 with the two limiting rods 42. When the piston rod body 2 drives the pin ring 3 to extend and retract, the limiting rods 42 move linearly along a predetermined path under the limitation of the support frame 43 and the guide groove 6, effectively preventing deviation and rotation.

[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, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[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 piston rod anti-rotation device, comprising a cylinder (1), characterized in that, Also includes: A piston rod body (2) is provided inside the cylinder (1), and a pin ring (3) is provided at one end of the piston rod body (2). Anti-rotation components (4) are provided on both sides of the pin ring (3). The anti-rotation components (4) include fixed plates (41) provided on both sides of the pin ring (3). A limit rod (42) is fixedly connected to one side of the fixed plate (41). A support frame (43) is provided on the outside of the limit rod (42). An installation assembly (5) is provided at one end of the support frame (43). The installation assembly (5) includes a fixing plate (51) provided at one end of the support frame (43). An installation groove (52) is provided inside the fixing plate (51). A fastening frame (53) to improve the connection stability is provided on the inner side of the installation groove (52). A fixing bolt (54) is provided on one side of the fastening frame (53).

2. The piston rod anti-rotation device according to claim 1, characterized in that: The support frame (43) has a guide groove (6) inside. The inner side of the guide groove (6) is slidably connected to the outer side of the limiting rod (42). One end of the limiting rod (42) is threaded with an anti-detachment block (7).

3. A piston rod anti-rotation device according to claim 1, characterized in that: A connecting rod (8) is fixedly connected to one side of the fastening bracket (53), and the outer side of the fixing bolt (54) is threadedly connected to the inside of the fixing plate (51).

4. A piston rod anti-rotation device according to claim 1, characterized in that: A positioning frame (9) is fixedly connected to one side of the fixing plate (51), and a fixing block (10) is provided on one side of the positioning frame (9).

5. A piston rod anti-rotation device according to claim 4, characterized in that: The positioning frame (9) is provided with bolts (11), and the cylinder head (12) is fixedly connected to one side of the fixing block (10). The inside of the cylinder head (12) is connected to the inside of the cylinder (1).

6. The piston rod anti-rotation device according to claim 1, characterized in that: The cylinder (1) has a cylinder bottom (13) on its rear surface, an oil port (14) on its top, and a piston (15) on one end of the piston rod body (2).

7. A piston rod anti-rotation device according to claim 6, characterized in that: A sealing ring (16) is provided on the outer side of the piston (15), and an O-ring (17) is provided on the inner side of the piston (15).

8. A piston rod anti-rotation device according to claim 1, characterized in that: The cylinder (1) is provided with a dustproof ring (18) on the inner side, and the piston rod body (2) is provided with a wear-resistant ring (19) and a guide sleeve (20) on the outer side.

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