A cylinder piston rod assembly
By designing a sliding connection and internal threaded rod structure in the piston rod, the deflection of the piston ring is limited, and the friction increase and wear problems caused by the deflection of the piston rod during long-term use is solved, achieving a more stable and durable piston rod connection.
Patent Information
- Application Number
- CN202420800622.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The existing piston rods are prone to deflection during long-term use, resulting in increased friction between the piston ring and the inner wall of the oil cylinder, thereby accelerating wear.
By designing the sliding connection method between the connecting rod and the piston ring, an internal threaded rod, a barrier ring, a long strip and an oil-resistance ring are installed on the connecting rod, and the deflection of the piston ring is limited with the fixation of the threaded column.
It effectively prevents the deflection of the piston ring relative to the connecting rod, reduces the friction between the piston ring and the inner wall of the oil cylinder, delays the occurrence of wear, and reduces the amount of thread stress, and reduces the risk of thread wear.
Smart Images
Figure CN222746364U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of piston rods, in particular to an oil cylinder piston rod assembly. Background Art
[0002] The piston rod is a mechanical part, usually a rod connecting the piston and the drive mechanism. It is generally used to transmit hydraulic power to achieve extension or retraction, and is an important component of the cylinder.
[0003] In the prior art, the connecting rod of the piston rod and the piston ring are connected by means of threads and snaps. Although the traditional connection method is stable, the piston ring and the connecting rod will produce slight deflection during long-term use. Once deflection occurs, the piston ring will be subjected to radial force, thereby increasing the friction between the piston ring and the inner wall of the cylinder, thereby accelerating the wear of the inner wall of the cylinder and the surface of the piston ring. Utility Model Content
[0004] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve the technical problems is: an oil cylinder piston rod assembly, comprising: a piston ring; a connecting rod, the connecting rod is used to connect the piston ring, the outer wall of the connecting rod is slidably connected to the inner wall of the piston ring; a threaded column, the outer wall of the threaded column is threadedly connected to the inner wall of the bottom of the connecting rod; a sealing ring, the outer wall of the sealing ring is slidably connected to the outer wall of the piston ring; a supporting ring, the outer wall of the supporting ring is slidably connected to the outer wall of the piston ring; a fixing device, the outer wall of the fixing device is slidably connected to the inner wall of the piston ring; the connecting rod includes an internally threaded rod, the outer wall of the internally threaded rod is fixedly connected A blocking ring is connected, and a long strip is fixedly connected to the bottom of the blocking ring. The long strip is slidably connected to the inner wall of the piston ring through a square blind hole, and the square blind hole is opened in the wall of the piston ring. The outer wall of the long strip is slidably connected to the inner wall of the gasket. The outer wall of the internal threaded rod is rotatably connected to an oil blocking ring, and a fixing groove is opened in the wall of the internal threaded rod. The outer wall of the internal threaded rod is slidably connected to the inner wall of the piston ring, and the top of the piston ring is in contact with the bottom of the gasket. The long strip and the piston ring are stably positioned, and the threaded column is fixed, so that the piston ring and the connecting rod are difficult to deflect, thereby preventing the piston ring from rotating relative to the connecting rod.
[0005] Preferably, the fixing device includes a sliding block, the inner wall of the sliding block is slidably connected to the outer wall of the connecting tube via a blocking groove, and the blocking groove is opened in the wall of the sliding block, and the end of the connecting tube away from the sliding block is fixedly connected with a push plate, and a compression spring is arranged inside the connecting tube, and the pressure of the sealing ring makes the fixing device enter the fixing groove of the connecting rod, thereby making the connection between the connecting rod and the piston ring tighter.
[0006] Preferably, one end of the compression spring is fixedly connected to the inner wall of the sliding block, and the other end of the compression spring is fixedly connected to the inner wall of the push plate. The outer wall of the connecting tube and the outer wall of the sliding block are both slidably connected to the inner wall of the piston ring, and the outer wall of the push plate is slidably connected to the inner wall of the fixed groove, so that the threads of the internal threaded rod and the threaded column are subjected to less stress and are more difficult to be damaged.
[0007] The beneficial effects of the utility model are as follows:
[0008] 1. The utility model arranges the connecting rod to be stably positioned through the long strip plate and the piston ring, and cooperates with the fixing of the threaded column to make it difficult for the piston ring and the connecting rod to deflect, thereby preventing the piston ring from rotating relative to the connecting rod, and reducing the radial force on the piston ring to achieve the purpose of reducing the friction between the inner wall of the oil cylinder and the piston ring.
[0009] 2. The utility model provides a fixing device, and the fixing device enters the fixing groove of the connecting rod through the pressure of the sealing ring, so that the connection between the connecting rod and the piston ring is tighter, and the threads of the internal threaded rod and the threaded column are less stressed and more difficult to be damaged. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is the front view of the utility model;
[0011] Figure 2 It is a cross-sectional view of the utility model;
[0012] Figure 3 It is a schematic diagram of the structure of the utility model at A;
[0013] Figure 4 It is an exploded view of the utility model;
[0014] Figure 5 It is a structural schematic diagram of the fixing device of the utility model.
[0015] In the figure: 1. piston ring; 2. connecting rod; 3. threaded column; 4. sealing ring; 5. support ring; 6. fixing device; 21. internal threaded rod; 22. blocking ring; 23. long strip; 24. oil blocking ring; 25. fixing groove; 26. gasket; 27. square blind hole; 61. sliding block; 62. blocking groove; 63. connecting pipe; 64. push plate; 65. compression spring. DETAILED DESCRIPTION
[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.
[0017] Example: See Figure 1 - Figure 5 The utility model provides a technical solution: a cylinder piston rod assembly, comprising: a piston ring 1; a connecting rod 2, the connecting rod 2 is used to connect the piston ring 1, the outer wall of the connecting rod 2 is slidably connected to the inner wall of the piston ring 1; a threaded column 3, the outer wall of the threaded column 3 is threadedly connected to the inner wall of the bottom of the connecting rod 2; a sealing ring 4, the outer wall of the sealing ring 4 is slidably connected to the outer wall of the piston ring 1; a support ring 5, the outer wall of the support ring 5 is slidably connected to the outer wall of the piston ring 1; a fixing device 6, the outer wall of the fixing device 6 is slidably connected to the inner wall of the piston ring 1; the connecting rod 2 comprises an internal threaded rod 21, the outer wall of the internal threaded rod 21 is fixedly connected with a blocking ring 22, the bottom of the blocking ring 22 is fixedly connected with a long strip 23, the long strip 23 is slidably connected to the inner wall of the piston ring 1 through a square blind hole 27, and the square blind hole 27 is opened in the wall of the piston ring 1, the outer wall of the long strip 23 is slidably connected to the inner wall of the gasket 26, the outer wall of the internal threaded rod 21 is rotatably connected with an oil blocking ring 24, the internal threaded rod 2 A fixing groove 25 is opened in the wall of 1, the outer wall of the internal threaded rod 21 is slidably connected with the inner wall of the piston ring 1, the top of the piston ring 1 contacts the bottom of the gasket 26, the opening of the gasket 26 is aligned with the square blind hole 27 of the piston ring 1, at this time, the long strip plate 23 is aligned with the square blind hole 27, the internal threaded rod 21 is aligned with the circular hole of the piston ring 1, and the connecting rod 2 is inserted into the piston ring 1 until the blocking ring 22 is blocked by the gasket 26, at this time, the threaded column 3 is inserted into the other end of the piston ring 1, so that the threaded part of the threaded column 3 is screwed into the threaded part of the internal threaded rod 21 and cooperates with each other, because the cylindrical diameter at the bottom of the threaded column 3 is larger than the circular hole diameter of the piston ring 1, the piston ring 1 is squeezed by the cylinder below the threaded column 3 and the bottom of the blocking ring 22, so that the piston ring 1 is stably positioned on the connecting rod 2, and through the cooperation of the long strip plate 23 and the square blind hole 27, the freedom of the piston ring 1 on the connecting rod 2 is limited, so that the piston ring 1 is difficult to deflect relative to the connecting rod 2.
[0018] The fixing device 6 includes a sliding block 61, the inner wall of the sliding block 61 is slidably connected to the outer wall of the connecting tube 63 through a blocking groove 62, and the blocking groove 62 is opened in the wall of the sliding block 61, and the end of the connecting tube 63 away from the sliding block 61 is fixedly connected with a push plate 64, and a compression spring 65 is arranged inside the connecting tube 63. After the sealing ring 4 is installed into the piston ring 1, the sliding block 61 is driven to move into the internal threaded rod 21 under the strong pressure of the sealing ring 4. During the movement, the compression spring 65 and the connecting tube 63 in the blocking groove 62 will be pushed. Under the elastic force of the thrust compression spring 65 of the connecting tube 63, the push plate 64 moves toward the direction of the internal threaded rod 21. Since the connecting rod 2 has been positioned during installation, the push plate 64 will enter the fixing groove 25 at this time, thereby assisting the threaded column 3 to fix the outer wall of the internal threaded rod 21.
[0019] One end of the compression spring 65 is fixedly connected to the inner wall of the sliding block 61, and the other end of the compression spring 65 is fixedly connected to the inner wall of the push plate 64. The outer wall of the connecting tube 63 and the outer wall of the sliding block 61 are both slidably connected to the inner wall of the piston ring 1, and the outer wall of the push plate 64 is slidably connected to the inner wall of the fixing groove 25. The push plate 64 is in the fixing groove 25 to disperse the pressure between the threaded column 3 and the internal threaded rod 21, so that the piston rod is less likely to cause thread wear under long-term use, thereby delaying the time for the piston ring 1 to fall off from the connecting rod 2.
[0020] Working principle:
[0021] When in use, after the connecting rod 2 is inserted into the piston ring 1 and the piston ring 1 is clamped by the threaded column 3, the piston rod is formed. During this process, the gasket 26 is placed in the bottom recessed part of the piston ring 1, and the opening of the gasket 26 is aligned with the square blind hole 27 of the piston ring 1. At this time, the long strip 23 is aligned with the square blind hole 27, and the internal threaded rod 21 is aligned with the round hole of the piston ring 1. The connecting rod 2 is inserted into the piston ring 1 until the blocking ring 22 is blocked by the gasket 26. At this time, the threaded column 3 is inserted into the other end of the piston ring 1 so that The threaded portion of the threaded column 3 is screwed into the threaded portion of the internal threaded rod 21 and cooperates with each other. Since the cylindrical diameter at the bottom of the threaded column 3 is larger than the diameter of the circular hole of the piston ring 1, the piston ring 1 is squeezed by the cylinder below the threaded column 3 and the bottom of the blocking ring 22, so that the piston ring 1 is stably positioned on the connecting rod 2, and through the cooperation of the long plate 23 and the square blind hole 27, the freedom of the piston ring 1 on the connecting rod 2 is limited, so that the piston ring 1 is difficult to deflect relative to the connecting rod 2, thereby preventing the friction between the piston ring 1 and the inner wall of the cylinder from increasing.
[0022] A fixing device 6 is provided to assist in fixing the internal threaded rod 21. Since the sealing ring 4 and the support ring 5 are installed on the outside of the piston ring 1 to maintain sealing and stability, and since the sealing ring 4 needs to ensure that the oil does not cross the obstruction of the piston ring 1, the sealing ring 4 installed in the piston ring 1 will exert a large pressure on the piston ring 1 to ensure the sealing effect of the sealing ring 4. The sealing ring 4 is installed after the connecting rod 2 is installed. Since the connecting rod 2 pushes the fixing device 6 to move when the connecting rod 2 is installed, the sliding block 61 is slightly protruded from the installation groove of the sealing ring 4. After the sealing ring 4 is installed in the piston ring 1, the sliding block 61 is driven to move into the internal threaded rod 21 under the strong pressure of the sealing ring 4. During the movement, the compression spring 65 and the connecting tube 63 in the blocking groove 62 will be pushed. Under the elastic force of the thrust compression spring 65 of the connecting tube 63, the push plate 64 moves toward the direction of the internal threaded rod 21. Since the connecting rod 2 has been positioned during installation, the push plate 64 will enter the fixing groove 25 at this time, thereby assisting the threaded column 3 to fix the outer wall of the internal threaded rod 21, and an oil blocking ring 24 is provided to prevent oil leakage at the fixing device 6. The push plate 64 is used in the fixing groove 25 to disperse part of the pressure between the threaded column 3 and the internal threaded rod 21, thereby making it difficult for the piston rod to cause thread wear under long-term use, thereby delaying the time for the piston ring 1 to fall off from the connecting rod 2.
[0023] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.
Claims
1. A cylinder piston rod assembly, characterized in that: include: Piston ring (1); A connecting rod (2), the connecting rod (2) being used to connect the piston ring (1), the outer wall of the connecting rod (2) being slidably connected to the inner wall of the piston ring (1); A threaded column (3), the outer wall of the threaded column (3) being threadedly connected to the inner wall of the bottom of the connecting rod (2); A sealing ring (4), the outer wall of the sealing ring (4) being slidably connected to the outer wall of the piston ring (1); A support ring (5), the outer wall of the support ring (5) being slidably connected to the outer wall of the piston ring (1); A fixing device (6), the outer wall of the fixing device (6) being slidably connected to the inner wall of the piston ring (1); The connecting rod (2) comprises an internally threaded rod (21), the outer wall of the internally threaded rod (21) is fixedly connected to a blocking ring (22), the bottom of the blocking ring (22) is fixedly connected to a long strip (23), the long strip (23) is slidably connected to the inner wall of the piston ring (1) via a square blind hole (27), and the square blind hole (27) is provided in the wall of the piston ring (1), the outer wall of the long strip (23) is slidably connected to the inner wall of the gasket (26), the outer wall of the internally threaded rod (21) is rotatably connected to an oil blocking ring (24), and a fixing groove (25) is provided in the wall of the internally threaded rod (21).
2. The oil cylinder piston rod assembly according to claim 1, characterized in that: The outer wall of the internally threaded rod (21) is slidably connected to the inner wall of the piston ring (1), and the top of the piston ring (1) is in contact with the bottom of the gasket (26).
3. The oil cylinder piston rod assembly according to claim 1, characterized in that: The fixing device (6) comprises a sliding block (61), the inner wall of the sliding block (61) is slidably connected to the outer wall of the connecting tube (63) via a blocking groove (62), and the blocking groove (62) is provided in the wall of the sliding block (61), one end of the connecting tube (63) away from the sliding block (61) is fixedly connected to a push plate (64), and a compression spring (65) is arranged inside the connecting tube (63).
4. The oil cylinder piston rod assembly according to claim 3, characterized in that: One end of the compression spring (65) is fixedly connected to the inner wall of the sliding block (61), and the other end of the compression spring (65) is fixedly connected to the inner wall of the push plate (64).
5. The oil cylinder piston rod assembly according to claim 3, characterized in that: The outer wall of the connecting pipe (63) and the outer wall of the sliding block (61) are both slidably connected to the inner wall of the piston ring (1), and the outer wall of the push plate (64) is slidably connected to the inner wall of the fixing groove (25).