Damping-force adjustable seat damper

Abstract

The invention discloses a damping-force adjustable seat damper. The damping-force adjustable seat damper comprises an outer cylinder, an inner cylinder, a piston assembly, a hollow piston rod, an adjusting structure, a guide structure and a compression valve, wherein the guide structure comprises a guide base and a guide oil seal, the bottom of the guide base is provided with a non-return sealingfin, and the non-return sealing fin is in interference fit with the hollow piston rod; and the adjusting structure comprises an adjusting rod and an adjusting pushing fork, the surface of the front end of the adjusting rod is provided with a transverse guide groove, one end of the transverse guide groove is provided with a confluence hole, and the hollow piston rod is provided with a guide hole. Asafety relief valve structure is adopted by the compression valve, and the compression valve comprises a valve seat, a valve sleeve, a valve element, a valve clack and a reset spring, wherein the valve clack is provided with a pressure releasing channel, and the valve element is provided with at least one damping valve plate matched with the pressure releasing channel. According to the damping-force adjustable seat damper, up-and-down movement stability of the piston rod can be further guaranteed by means of the guide structure, the making process of the adjusting structure is simple, and theadjusting stability is good; and it can be guaranteed that the damper is stable and reliable to use by means of the compression valve, and the repair rate is decreased.

Description

technical field [0001] The invention relates to a seat auxiliary structure, in particular to a seat damper with adjustable damping force. Background technique [0002] As people's requirements for ride comfort are getting higher and higher, seat dampers, as an auxiliary structure to ensure seat ride comfort, have been continuously developed and improved. Both have a certain length. In order to ensure the stability and reliability of the piston rod pushing the piston action in the inner cylinder, it is often necessary to use a special guide structure to guide and support the piston rod; Structure, in order for the piston rod to move down smoothly, a part of the oil on the lower side of the guide base (the volume of this part of oil corresponds to the volume of the downward movement of the piston rod) needs to flow to the upper side of the guide base and pass through the guide base The guide flow enters the outer cylinder, and there is usually a certain gap between the inner ...

AI Technical Summary

Problems solved by technology

[0002] As people's requirements for ride comfort are getting higher and higher, seat dampers, as an auxiliary structure to ensure seat ride comfort, have been continuously developed and improved. Both have a certain length. In order to ensure the stability and reliability of the piston rod pushing the piston action in the inner cylinder, it is often necessary to use a special guide structure to guide and support the piston rod; Structure, in order for the piston rod to move down smoothly, a part of the oil on the lower side of the guide base (the volume of this part of oil corresponds to the volume of the downward movement of the piston rod) needs to flow to the upper side of the guide base and pass through the guide base The guide flow enters the outer cylinder, and there is usually a certain gap between the inner side of the guide base and the piston rod. The existence of this gap makes the oil pass through the guide base when the piston rod moves upward. There is mutual communication between the outer cylinder and the inner cylinder, so that the movement stability of the piston rod cannot be guaranteed;

[0003] In order to improve the comfort of the seat, the damping force of the seat damper can usually be adjusted appropriately. When the piston rod of the damper is pushed and compressed, the hydraulic oil in the lower chamber of the piston needs to pass through the piston rod, the adjustment rod and the piston connector. The interior passes through the piston and flows into the lower chamber of the piston; when the piston rod is stretched back and forth, the hydraulic oil in the upper chamber of the piston needs to pass through the piston rod, the adjustment rod and the inside of the piston connector and flow into the lower chamber of the piston; the existing The adjustment structure of the seat damper is usually to open an auxiliary diversion hole on the piston connection head to cooperate with the diversion holes on the piston rod and the adjustment rod to divert the hydraulic oil in the upper chamber of the piston to the lower chamber of the piston or to guide the hydraulic oil in the lower chamber of the piston. The hydraulic oil in the pump is diverted to the upper chamber of the piston. Since the connection between the piston head and the piston rod is usually threaded, and it is difficult to open holes directly at the threaded joint, it is necessary to design a relatively complicated oil channel to make the piston go up. The hydraulic oil in the chamber / piston lower chamber can smoothly enter the piston lower chamber / piston upper chamber through the piston connector, piston rod and adjustment rod, and when the adjustment rod is turned, it is also the guide hole on the adjustment rod and the piston rod. Align or stagger the diversion holes to adjust the damping force. This kind of structure usually needs to design and install steps at the end of the piston rod to match the piston connector. The structure of the piston rod and the piston connector is complicated, the manufacturing process is relatively complicated, and the production cost High, poor adjustment stability;

[0004] Moreover, during the long-term use of the seat damper, there is an occasional technical defect, that is, when the oil pressure in the lower chamber of the piston of the damper is too high, due to the comparison of the channel structure of the hydraulic oil in the lower chamber of the piston entering the upper chamber of the piston Special, the piston will be stuck and unable to move, and the bottom valve in the lower part of the piston chamber in the prior art is generally a conventional one-way valve. Although the hydraulic oil is injected well, it cannot relieve the damper. Therefore, the damper will lose its damping effect and become a rigid rigid body, which no longer has a cushioning or elastic effect, which not only affects the comfort of use, improves the repair rate of the product, but also affects the reputation of the product

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