Hydraulic cylinder with built-in overflow valve
By setting a pressure relief channel and elastic seal at the end of the hydraulic cylinder piston rod, the problem of abnormal pressurization of the hydraulic cylinder caused by operational errors is solved, automatic pressure relief protection is achieved, and the safety and use effect of the equipment are improved.
Patent Information
- Application Number
- CN202422694961.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-06
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-06
AI Technical Summary
In existing hydraulic cylinders, due to operational errors or external factors, the valves may not work properly, resulting in abnormal pressurization in the chamber and possible damage to the cylinder components that cannot be repaired.
A hydraulic cylinder with a built-in overflow valve is designed. By setting a pressure relief channel at the end of the piston rod and installing elastic parts and seals, the piston rod can be used as a safety valve. Under normal circumstances, the pressure relief channel is sealed, and under abnormal circumstances, the pressure relief channel releases pressure.
It realizes automatic pressure relief in the event of operating errors or abnormal conditions, protecting the hydraulic cylinder from damage. It has a simple structure and can complete the pressure relief function without external piping, and has excellent performance.
Smart Images
Figure CN223411149U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder with a built-in overflow valve. Background Art
[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, producing linear reciprocating (or oscillating) motion. It features a simple structure and reliable operation. Using it to achieve reciprocating motion eliminates the need for a reduction gear, eliminates transmission backlash, and provides smooth motion. Therefore, it is widely used in the hydraulic systems of various machines.
[0003] However, there are currently cases where, due to operator misoperation or external factors, the pull rod is pulled by the equipment and pulled toward the device, then the valves in the hydraulic circuit cannot work normally, the pressure in the chamber is abnormal, and the cylinder assembly may be severely damaged and cannot be repaired. Utility Model Content
[0004] The purpose of the utility model is to solve the problems existing in the prior art and to propose a hydraulic cylinder with a built-in overflow valve.
[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:
[0006] A hydraulic cylinder with a built-in overflow valve includes a hydraulic cylinder body and a piston rod. A chamber is provided in the hydraulic cylinder body. Liquid channels connected to the outside of the hydraulic cylinder body are provided on both sides of the chamber. The piston includes an end and a rod connected to the end. The rod passes through one side of the hydraulic cylinder body. The end is located in the chamber and is adapted to the chamber. A pressure relief channel is provided on the side of the end, and the other end of the pressure relief channel extends to the outside of the rod body. An elastic part is installed inside the pressure relief channel, and a sealing part is installed on the other end of the elastic part. The sealing part is tightly attached to the side of the end through the elastic part.
[0007] Preferably, the pressure relief channel includes a horizontal portion and a vertical portion that are connected, the inner diameter of the horizontal portion is larger than the inner diameter of the vertical portion, the horizontal portion extends horizontally from the side of the end portion to the rod portion, and then extends vertically to the outside of the rod portion through the vertical portion to communicate with the chamber.
[0008] Preferably, a fixing piece is installed on the inner side of the horizontal portion, and both ends of the fixing piece are designed to be through-connected. The elastic piece is fixedly installed on one end of the fixing piece, and the other end is connected to the sealing piece.
[0009] Preferably, the elastic member is a spring.
[0010] Preferably, the sealing member includes a rod body and a sealing block installed at the outer end of the rod body, and the sealing block is made of rubber.
[0011] Compared with the prior art, the beneficial effects of the present invention are:
[0012] The utility model uses elastic parts and sealing parts at the end of the piston rod to be used as a safety valve. During normal use, the sealing part seals the pressure relief channel. When the pull rod is pulled by the equipment due to operating errors of workers, resulting in abnormal pressurization on one side of the chamber, the pressure can be released to the other side of the end through the pressure relief channel. Compared with the existing technology, the overall structural design of the oil cylinder is simple, and the pressure relief function can be completed without external piping, with excellent use effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic diagram of the interior of the hydraulic cylinder with a built-in overflow valve proposed by the present invention.
[0014] In the figure: 1. Hydraulic cylinder body; 2. Piston rod; 3. Chamber; 4. Liquid channel; 5. End; 6. Rod; 7. Pressure relief channel; 8. Elastic part; 9. Fixing part; 10. Rod body; 11. Sealing block. DETAILED DESCRIPTION
[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0016] Reference Figure 1 A hydraulic cylinder with a built-in overflow valve includes a hydraulic cylinder body 1 and a piston rod 2. A chamber 3 is provided in the hydraulic cylinder body 1. Liquid channels 4 connected to the outside of the hydraulic cylinder body 1 are provided on both sides of the chamber 3. The piston includes an end 5 and a rod 6 connected to the end 5. The rod 6 passes through one side of the hydraulic cylinder body 1. The end 5 is located in the chamber 3 and is adapted to the chamber 3. A pressure relief channel 7 is provided on the side of the end 5, and the other end of the pressure relief channel 7 extends to the outside of the rod body 10. An elastic part 8 is installed inside the pressure relief channel 7, and the elastic part 8, the other end of the elastic part 8 is installed with a seal, and the seal is tightly attached to the side of the end 5 through the elastic part 8, and the elastic part 8 is a spring.
[0017] When the oil cylinder is in use, the structural design of the seal and the elastic member 8 allows the end 5 of the piston rod 2 to be used as a safety valve. During normal use, the seal seals the pressure relief channel 7 and the piston rod 2 works normally. When the pull rod is pulled by the equipment due to an operational error of a worker, resulting in abnormal pressurization on one side of the chamber 3, the pressure can be released to the other side of the end 5 through the pressure relief channel 7. Compared with the existing technology, the overall structural design of the oil cylinder is simple, and the pressure relief function can be completed without external piping, with excellent use effect.
[0018] In this embodiment, the pressure relief channel 7 includes a horizontal portion and a vertical portion that are connected. The inner diameter of the horizontal portion is larger than the inner diameter of the vertical portion. The horizontal portion extends horizontally from the side of the end portion 5 to the rod portion 6, and then extends vertically through the vertical portion to the outside of the rod portion 6 to communicate with the chamber 3.
[0019] A fixing part 9 is installed on the inner side of the horizontal part. The left end of the fixing part 9 is designed in a pointed shape, and the two ends thereof are designed in a through-shape. The elastic part 8 is fixedly installed at one end of the fixing part 9, and the other end is connected to the sealing part. The sealing part includes a rod body 10 and a sealing block 11 installed at the outer end 5 of the rod body 10. The material of the sealing block 11 is rubber. A groove is provided at the position corresponding to the end 5 of the piston rod 2. The sealing block 11 is located in the groove, and its inner side is pressed against the inner wall of the groove by the elastic force of the spring. When the pull rod is pulled by the equipment due to the operator's operating error or other reasons, the chamber 3 on the left side of the end 5 is pressurized. At this time, the liquid can enter the vertical part, and then pass through the fixing part 9 and the spring. The seal is separated from the side wall of the end 5 by the hydraulic pressure, realizing the transfer of liquid from one side of the end 5 to the other side, thereby realizing the pressure relief process.
[0020] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A hydraulic cylinder with a built-in relief valve, comprising a hydraulic cylinder body and a piston rod. The hydraulic cylinder body is provided with a chamber, and both sides of the chamber are provided with liquid passages connected to the outside of the hydraulic cylinder body. The piston includes an end portion and a rod portion connected to the end portion, the rod portion extending through one side of the hydraulic cylinder body, the end portion being located within the chamber and adapted to fit within the chamber. The invention is characterized in that: A pressure relief channel is provided on the side of the end portion, and the other end of the pressure relief channel extends to the outside of the rod body. An elastic member is installed inside the pressure relief channel, and a sealing member is installed on the other end of the elastic member. The sealing member is tightly attached to the side of the end portion through the elastic member.
2. The hydraulic cylinder with a built-in overflow valve according to claim 1, characterized in that: The pressure relief channel includes a horizontal portion and a vertical portion that are connected. The inner diameter of the horizontal portion is larger than the inner diameter of the vertical portion. The horizontal portion extends horizontally from the side of the end portion to the rod portion, and then extends vertically to the outside of the rod portion through the vertical portion to communicate with the chamber.
3. The hydraulic cylinder with a built-in overflow valve according to claim 2, characterized in that: A fixing piece is installed on the inner side of the horizontal portion, and both ends of the fixing piece are designed to be through-connected. The elastic piece is fixedly installed on one end of the fixing piece, and the other end is connected to the sealing piece.
4. The hydraulic cylinder with a built-in overflow valve according to claim 3, characterized in that: The elastic member is a spring.
5. The hydraulic cylinder with a built-in relief valve according to claim 3, characterized in that: The sealing member comprises a rod body and a sealing block installed at the outer end of the rod body, and the sealing block is made of rubber.