Hydraulic oil cylinder

Abstract

The hydraulic oil cylinder comprises a cylinder barrel, an end cover is arranged on one side of the cylinder barrel, a piston rod is connected to the middle of the end cover in an inserted mode, a piston is arranged at the end, located in the cylinder barrel, of the piston rod, a spring is connected to the position, located between the piston and the end cover, of the piston rod in a sleeved mode, and a fixing plate is arranged at the end, located outside the cylinder barrel, of the piston rod. Four reinforcing rods arranged in a matrix mode are connected to the outer side of the end cover in an inserted mode, the reinforcing rods are fixedly connected with the fixing plate, a liquid inlet is formed in the side, away from the end cover, of the cylinder barrel, and a liquid outlet is formed in the side, away from the liquid inlet, of the cylinder barrel. The connecting structure is simple in structure, convenient to operate and good in overall stability, impact force borne by the piston rod is buffered through elastic force of the spring, and the service life of the piston rod is effectively prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rods, in particular to a hydraulic cylinder. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. Taking the hydraulic cylinder as an example, it is composed of: cylinder barrel, piston rod (cylinder rod), piston, and end cover. The quality of its processing directly affects the life and reliability of the entire product. The piston rod processing requirements are high, and its surface roughness requirement is Ra0.4~0.8μm, and the coaxiality and wear resistance are strict. The piston assembly includes: piston, piston ring, support ring, piston rod, etc. When the piston rod moves, it cannot effectively buffer and shock it. Therefore, the top of the piston rod will be damaged to varying degrees when it is subjected to a strong impact. The existing anti-fracture structure cannot effectively protect the top of the piston rod, which reduces the service life of the piston rod. For this reason, we propose a hydraulic cylinder. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a hydraulic cylinder. The utility model solves the problem that the piston rod cannot be effectively buffered and shock-absorbed when it moves, so the top of the piston rod will be damaged to varying degrees when subjected to a strong impact, and the existing anti-fracture structure cannot effectively protect the top of the piston rod, reducing the service life of the piston rod.

[0004] A hydraulic oil cylinder in the utility model comprises a cylinder barrel, an end cover is provided on one side of the cylinder barrel, a piston rod is inserted in the middle of the end cover, a piston is provided at one end of the piston rod located in the cylinder barrel, a spring is sleeved between the piston and the end cover, a fixing plate is provided at one end of the piston rod located outside the cylinder barrel, four reinforcing rods arranged in a matrix are inserted on the outside of the end cover, the reinforcing rods are fixedly connected to the fixing plate, a liquid inlet is provided on the side of the cylinder barrel away from the end cover, and a liquid outlet is provided on the side of the cylinder barrel away from the liquid inlet.

[0005] In the above solution, a dust ring is provided between the piston rod and the end cover.

[0006] In the above solution, a first sealing ring is provided between the piston rod and the end cover.

[0007] In the above solution, the end cover and the cylinder barrel are fixedly connected by bolts.

[0008] In the above solution, two second sealing rings are provided between the end cover and the cylinder barrel.

[0009] In the above solution, a piston sealing ring is provided on the outer side of the piston.

[0010] In the above solution, an anti-wear ring is provided on one side of the piston sealing ring.

[0011] The advantages and beneficial effects of the utility model are as follows: the utility model provides a hydraulic oil cylinder, a reinforcing rod and an end cover are movably connected, and the overall structural strength of the connection structure is effectively guaranteed through the mutual cooperation between the reinforcing rod and the end cover. Hydraulic oil can be injected into one side of the piston through the liquid inlet, and hydraulic oil can be injected into the other side of the piston through the liquid outlet. When the piston rod is extended and retracted under the action of the hydraulic oil, the piston squeezes the spring, and the impact force on the piston rod can be buffered by the elastic force of the spring, effectively reducing the probability of damage to the piston rod. This connection structure is simple in structure, easy to operate, and has good overall stability. The impact force on the piston rod is buffered by the elastic force of the spring, effectively extending the service life of the piston rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional view of the utility model;

[0015] Figure 3 This is a schematic structural diagram of part A of the utility model.

[0016] In the figure: 1, cylinder 2, end cover 3, piston rod 4, piston

[0017] 5. Piston seal 6. Spring 7. Reinforcement rod 8. Fixing plate

[0018] 9. Liquid inlet 10. Liquid outlet 11. Dust ring 12. First sealing ring

[0019] 13. Bolt 14. Second sealing ring 15. Anti-wear ring. DETAILED DESCRIPTION

[0020] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] like Figure 1-3 As shown, the utility model is a hydraulic cylinder, including a cylinder barrel 1, an end cover 2 is provided on one side of the cylinder barrel 1, a piston rod 3 is inserted in the middle of the end cover 2, the piston rod 3 and the end cover 2 are movably connected, the piston rod 3 is located in the cylinder barrel 1 and has a piston 4 at one end, the piston rod 3 is located between the piston 4 and the end cover 2 and is sleeved with a spring 6, the piston rod 3 is located outside the cylinder barrel 1 and has a fixing plate 8, four matrix-arranged reinforcing rods 7 are inserted on the outside of the end cover 2, the reinforcing rod 7 is fixedly connected to the fixing plate 8, the reinforcing rod 7 and the end cover 2 are movably connected, and the reinforcing rod 7 is connected to the end cover 2. The mutual cooperation between the reinforcing rod 7 and the end cover 2 effectively ensures the overall structural strength of the connection structure. The cylinder 1 is provided with a liquid inlet 9 on the side away from the end cover 2, and the cylinder 1 is provided with a liquid outlet 10 on the side away from the liquid inlet 9. Hydraulic oil can be injected into one side of the piston 4 through the liquid inlet 9, and hydraulic oil can be injected into the other side of the piston 4 through the liquid outlet 10. When the piston rod 3 is extended and retracted under the action of the hydraulic oil, the piston 4 squeezes the spring 6, and the elastic force of the spring 6 can buffer the impact force on the piston rod 3, thereby effectively reducing the probability of damage to the piston rod 3.

[0022] A dust ring 11 is provided between the piston rod 3 and the end cover 2 , and the dust ring 11 can protect the connection surface between the piston rod 3 and the end cover 2 , thereby effectively preventing dust from entering the cylinder 1 .

[0023] A first sealing ring 12 is provided between the piston rod 3 and the end cover 2 , and the first sealing ring 12 can seal the connection surface between the piston rod 3 and the end cover 2 .

[0024] The end cover 2 and the cylinder barrel 1 are fixedly connected by bolts 13 .

[0025] Two second sealing rings 14 are provided between the end cover 2 and the cylinder barrel 1 , and the second sealing rings 14 can seal the connection surface between the end cover 2 and the cylinder barrel 1 .

[0026] A piston sealing ring 5 is disposed on the outer side of the piston 4 .

[0027] An anti-wear ring 15 is provided on one side of the piston sealing ring 5 .

[0028] Specifically, in the utility model, the reinforcing rod 7 and the end cover 2 are movably connected. Through the mutual cooperation between the reinforcing rod 7 and the end cover 2, the overall structural strength of the connection structure is effectively guaranteed. Hydraulic oil can be injected into one side of the piston 4 through the liquid inlet 9, and hydraulic oil can be injected into the other side of the piston 4 through the liquid outlet 10. When the piston rod 3 is extended and retracted under the action of the hydraulic oil, the piston 4 squeezes the spring 6. The elastic force of the spring 6 can buffer the impact force on the piston rod 3, thereby effectively reducing the probability of damage to the piston rod 3.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic cylinder, comprising a cylinder barrel (1), characterized in that: An end cover (2) is provided on one side of the cylinder barrel (1), a piston rod (3) is inserted in the middle of the end cover (2), a piston (4) is provided at one end of the piston rod (3) located inside the cylinder barrel (1), a spring (6) is sleeved between the piston (4) and the end cover (2), a fixing plate (8) is provided at one end of the piston rod (3) located outside the cylinder barrel (1), four reinforcing rods (7) arranged in a matrix are inserted on the outside of the end cover (2), the reinforcing rods (7) are fixedly connected to the fixing plate (8), a liquid inlet (9) is provided on the side of the cylinder barrel (1) away from the end cover (2), and a liquid outlet (10) is provided on the side of the cylinder barrel (1) away from the liquid inlet (9).

2. A hydraulic cylinder according to claim 1, characterized in that: A dustproof ring (11) is provided between the piston rod (3) and the end cover (2).

3. A hydraulic cylinder according to claim 1, characterized in that: A first sealing ring (12) is provided between the piston rod (3) and the end cover (2).

4. A hydraulic cylinder according to claim 1, characterized in that: The end cover (2) and the cylinder barrel (1) are fixedly connected via bolts (13).

5. The hydraulic cylinder according to claim 1, characterized in that: Two second sealing rings (14) are provided between the end cover (2) and the cylinder barrel (1).

6. The hydraulic cylinder according to claim 1, characterized in that: A piston sealing ring (5) is provided on the outer side of the piston (4).

7. A hydraulic cylinder according to claim 6, characterized in that: An anti-wear ring (15) is provided on one side of the piston sealing ring (5).

Images