Seat damper with side adjustment of damping force

Abstract

The present application relates to the technical field of automobile seat damping accessories, and discloses a seat damper capable of adjusting damping force from the side, which comprises an oil storage cylinder assembly, a piston rod assembly, a guider assembly, a piston valve assembly and a side damping adjusting mechanism. The two ends of the oil storage cylinder assembly are respectively provided with upper and lower lifting rings, the inner cavity of the oil storage cylinder is filled with damping oil to form a working oil chamber, and a storage cylinder interlayer is formed between the cylinder wall of the oil storage cylinder and the internal working oil chamber. One end of the piston rod assembly is connected with the upper lifting ring. The seat damper capable of adjusting damping force from the side has an adjusting mechanism that protrudes only to the side, does not occupy the axial installation space at both ends of the damper, is suitable for low and compact seats, avoids interference of the vehicle-mounted structure, and is suitable for adverse working conditions such as dump trucks and engineering vehicles.

Description

Technical Field

[0001] This invention relates to the field of automotive seat shock absorption components, specifically a seat damper with adjustable side damping force. Background Technology

[0002] Due to the limited space in car seat design, the overall height of the seat needs to be reduced to meet the needs of different customers. Existing products can no longer meet the needs of relevant customers, so this side-adjustable damper was launched. The adjustment position of the product is moved from the top to the guide part, and a variable damping device is designed in the guide part.

[0003] Due to the limited height design of the entire chair frame, the current structure used is a piston rod valve hole adjustment device. To meet the requirements of this adjustment device, an external connecting device is required, which limits the formation and installation height of the damper. Based on the above problems, a seat damper with side-adjustable damping force is proposed. It can meet the usage requirements through lateral adjustment, which can greatly improve the lateral design space of the entire chair and greatly satisfy the user experience. Summary of the Invention

[0004] The purpose of this invention is to provide a seat damper with adjustable side damping force to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a seat damper with adjustable side damping force, including an oil reservoir assembly, a piston rod assembly, a guide assembly, a piston valve assembly, and a side damping adjustment mechanism; The oil reservoir assembly is provided with an upper lifting ring and a lower lifting ring at both ends. The inner cavity of the oil reservoir is filled with damping oil to form a working oil chamber. An oil reservoir interlayer is formed between the oil reservoir wall and the inner working oil chamber. One end of the piston rod assembly is connected to the upper lifting ring, and the other end extends into the oil reservoir and is fixed to the piston valve assembly. The piston valve assembly divides the working oil chamber into a rod chamber and a rodless chamber. The guide assembly is sealed and press-fitted to the opening at one end of the oil reservoir near the upper lifting ring, and the piston rod slides through the central hole of the guide. The side-mounted damping adjustment mechanism is laterally mounted on the side wall of the guide. The side-mounted damping adjustment mechanism includes an adjustment shaft, an adjustment valve core, a sealing bushing, and an adjustment knob. A lateral mounting through hole is opened on the side wall of the guide. The sealing bushing is press-fitted into the through hole. The adjustment shaft passes through the sealing bushing and can rotate circumferentially. The outer end of the adjustment shaft extends out of the outside of the guide and is equipped with an adjustment knob. The inner end of the adjustment shaft is fixedly connected to the adjustment valve core. The guide has a main oil passage that connects the working oil chamber and the oil reservoir jacket. The regulating valve core has a throttling hole a on its side wall. The guide has throttling holes b, d and e formed inside. Rotating the regulating shaft can change the overlapping oil passage cross-sectional area of ​​the throttling hole a and the main oil passage, thereby changing the damping oil flow resistance and realizing adjustable damping force.

[0006] Preferably, the side-mounted damping adjustment mechanism is an independent modular detachable component, with the adjustment valve core, adjustment shaft, sealing bushing, adjustment knob, piston rod, and piston valve assembly being separately configured and can be disassembled and replaced individually.

[0007] Preferably, the side-mounted damping adjustment mechanism is located in the guide section at the center of the damper's axial direction. The adjustment knob protrudes only laterally along the radial direction of the oil reservoir, without exceeding the axial height range of the upper and lower lifting rings of the oil reservoir, and does not occupy the vertical installation space of the seat.

[0008] Preferably, the outer wall of the regulating valve core is provided with a throttling orifice a with a continuously gradually changing opening. As the regulating shaft rotates circumferentially, the cross-sectional area of ​​the oil passage in the throttling orifice a changes continuously, thereby realizing stepless continuous adjustment of the damping force.

[0009] Preferably, under the damper's return stroke condition, the piston rod extends outward, the oil pressure in the rod chamber increases, and the damping oil flows from the rod chamber into the guide cavity, and sequentially flows through throttling orifice a, throttling orifice b, channel d, and channel e into the oil reservoir jacket.

[0010] Preferably, during the damper's compression stroke, the piston rod retracts inward, the oil pressure in the rodless chamber increases, and the oil passes through the piston valve assembly into the rod chamber. The excess oil in the working oil chamber enters the throttle orifice a along the inner cavity of the guide, and then flows into the oil reservoir jacket through the throttle orifice, channel d, and channel e.

[0011] Preferably, a piston rod oil seal is fitted between the center hole of the guide and the piston rod. The oil seal achieves radial sealing during the reciprocating sliding process of the piston rod, preventing damping oil from leaking out from the upper end of the oil reservoir.

[0012] Preferably, the sealing bushing is made of oil-resistant rubber, and the inner wall of the bushing is tightly fitted with the outer wall of the adjusting shaft to isolate the oil inside the guide and prevent the damping oil from leaking from the side through hole.

[0013] Compared with the prior art, the beneficial effects achieved by the present invention are: First, the adjustment mechanism of this invention only protrudes laterally, does not occupy the axial installation space at both ends of the damper, is suitable for low and compact seats, and avoids interference with the vehicle installation structure; the adjustment knob is located in the middle of the damper's Green assembly position, away from the upper and lower impact areas, making it less likely to bump the piston rod and avoid misadjusting the damping parameters, effectively reducing the risk of damping oil leakage, extending the service life of the damper, and making it suitable for harsh working conditions such as dump trucks and engineering vehicles.

[0014] Secondly, the present invention allows for on-site adjustment of damping with the exposed side adjustment knob without disassembling the seat cushion or cover, shortening the assembly and debugging time of the entire vehicle; the side adjustment mechanism is an independent modular component, and only partial parts need to be replaced when the valve core or seals are damaged, without the need to replace the entire damper assembly, which greatly reduces after-sales maintenance time and parts costs; the stepless damping adjustment can switch between soft and hard damping in real time according to the load and road conditions, taking into account both driving comfort and seat anti-bounce performance. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the entire invention; Figure 2 This is a schematic diagram of the overall axial cross-section of the restored stroke oil flow direction of the present invention. Figure 3 This is a partial cross-sectional view of the present invention; Figure 4 This is a partial cross-sectional view of the present invention; Figure 5 This is a schematic diagram of the oil passage of the present invention.

[0016] Among them: 101, piston rod assembly; 102, outer oil pipe cover; 103, oil seal; 104, Green assembly; 105, adjusting rod assembly; 106, inner oil pipe; 107, recovery valve assembly; 108, compression valve assembly; 109, outer oil pipe assembly; 110, damping oil. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This invention provides the following technical solutions: Example 1

[0019] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The seat damper with adjustable side damping force includes a piston rod assembly 101, an outer oil pipe cap 102, an oil seal 103, a Green assembly 104, an adjusting rod assembly 105, an inner oil pipe 106, a recovery valve assembly 107, a compression valve assembly 108, an outer oil pipe assembly 109, and damping oil 110. The outer oil pipe assembly 109 is equipped with an outer oil pipe cap 102 and a compression valve assembly 108 at both ends. The inner oil pipe 106 is coaxially arranged inside the outer oil pipe assembly 109. The two ends of the inner oil pipe 106 are connected to the Green assembly 104 and the recovery valve assembly 107, respectively. The piston rod assembly 101 passes through the outer oil pipe cover 102 and the green assembly 104 and extends into the inner oil pipe 106. The end of the piston rod assembly 101 is connected to the adjusting rod assembly 105. The Green Assembly 104 is laterally integrated with a side-mounted damping adjustment mechanism, which includes an adjustment shaft 1, an adjustment valve core 2, a sealing bushing 3, and an adjustment knob 4. A side mounting through hole is opened on the side wall of the Green Assembly 104, the sealing bushing 3 is press-fitted into the through hole, the adjustment shaft 1 passes through the sealing bushing 3 and can rotate circumferentially, the outer end of the adjustment shaft 1 extends out of the outside of the Green Assembly 104 and is equipped with the adjustment knob 4, and the inner end of the adjustment shaft 1 is fixedly connected to the adjustment valve core 2. The Green assembly 104 has a main oil passage internally machined to connect the inner cavity of the inner oil pipe 106 with the outer oil pipe assembly 109. The regulating valve core 2 has a throttling orifice a on its side wall. The Green assembly 104 has throttling orifice b, d channel and e channel formed inside. Rotating the regulating shaft 1 can change the overlapping oil passage cross-sectional area of ​​the throttling orifice a and the main oil passage, change the flow resistance of the damping oil 110, and realize the adjustable damping force.

[0020] The side-mounted damping adjustment mechanism is an independent, modular, and detachable component. The adjusting valve core 2, adjusting shaft 1, sealing bushing 3, adjusting knob 4, piston rod assembly 101, and adjusting rod assembly 105 are set separately and can be disassembled and replaced individually.

[0021] The side-mounted damping adjustment mechanism is located at the center of the damper's axial Green assembly 104. The adjustment knob 4 protrudes only radially along the outer oil pipe assembly 109, without exceeding the axial height range of the hinged mounting positions at both ends of the outer oil pipe assembly 109, and does not occupy the vertical installation space of the seat.

[0022] The outer wall of the regulating valve core 2 has a continuously gradually changing throttle hole a. As the regulating shaft 1 rotates circumferentially, the cross-sectional area of ​​the throttle hole a changes continuously, thereby realizing stepless continuous adjustment of the damping force.

[0023] Through the above technical solution, an oil storage jacket is formed between the outer oil pipe assembly 109 and the inner oil pipe 106. The inner oil pipe 106 is equipped with a piston rod assembly 101 and an adjusting rod assembly 105. The two ends are respectively arranged with a Green assembly 104, a recovery valve assembly 107, and a compression valve assembly 108. An independent, modular side-mounted damping adjustment mechanism is integrated on the side wall of the Green assembly 104 in the middle of the damper. The mechanism mainly consists of an adjustment knob 4, an adjustment shaft 1, a sealing bushing 3, and an adjustment valve core 2. It is press-fitted into the side through hole of the Green assembly 104 and is separately set from the piston rod assembly 101 and the adjustment rod assembly 105. It can be disassembled and replaced separately. The adjustment valve core 2 has a continuously and gradually changing throttling orifice a. By rotating the exposed adjustment knob 4, the adjustment shaft 1 and the valve core can be rotated, which can change the overlapping oil passage area between the throttling orifice a and the main oil passage inside the Green assembly 104, thereby continuously and steplessly changing the flow resistance of the damping oil 110 and realizing adjustable damping force. Example 2

[0024] Please see Figure 3 and Figure 4 The seat damper with side-adjustable damping force, under the condition of damper return stroke, the piston rod assembly 101 extends outward, the oil pressure in the rod chamber of the inner oil pipe 106 increases, and the damping oil 110 flows from the rod chamber into the inner cavity of the Green assembly 104, and successively flows through the throttle orifice a, throttle orifice b, d channel and e channel into the jacket of the outer oil pipe assembly 109.

[0025] During the compression stroke of the damper, the piston rod assembly 101 retracts inward, the oil pressure in the rodless chamber of the inner oil pipe 106 increases, and the damping oil 110 passes through the recovery valve assembly 107 and enters the rod chamber. The excess damping oil 110 in the working chamber enters the throttle orifice a along the inner cavity of the Green assembly 104, and then flows into the jacket of the outer oil pipe assembly 109 through the throttle orifice, d channel, and e channel.

[0026] Through the above technical solution, the recovery stroke is as follows: When the piston rod assembly 101 extends outward, the oil pressure in the rod chamber of the inner oil pipe 106 increases, forcing the damping oil 110 to flow from the rod chamber into the inner cavity of the Green assembly 104. This part of the oil will not return directly to the oil storage jacket, but must flow sequentially through the throttle orifice a on the regulating valve core 2, the throttle orifice b, the d channel and the e channel formed inside the Green assembly 104, and finally merge into the jacket of the outer oil pipe assembly 109. At this time, the flow cross-sectional area of ​​the throttle orifice a directly determines the return oil resistance of the rod chamber. By rotating the adjusting knob 4 to change this cross-sectional area, the damping force of the recovery stroke can be adjusted. Compression stroke: When the piston rod assembly 101 retracts inward, the oil pressure in the rodless chamber of the inner oil pipe 106 increases, and the oil passes through the compression valve assembly 108 and the recovery valve assembly 107 into the rod chamber. Since the piston rod assembly 101 occupies part of the volume, the excess damping oil 110 must be discharged from the working chamber. Its path is as follows: it enters the throttle orifice a along the inner cavity of the Green assembly 104, and then flows into the outer oil pipe assembly 109 jacket through the throttle orifice b, d channel and e channel. Similarly, by adjusting the oil passage cross-sectional area of ​​the throttle orifice a, the flow resistance of this part of the compensating oil can be controlled, and the compression damping can be adjusted synchronously. Example 3

[0027] Please see Figure 1 The seat damper with side-adjustable damping force is equipped with an oil seal 103 between the center hole of the Green assembly 104 and the piston rod assembly 101. The oil seal 103 achieves radial sealing during the reciprocating sliding process of the piston rod assembly 101, preventing the damping oil 110 from leaking out from the outer oil pipe cover 102.

[0028] The sealing bushing 3 is made of oil-resistant rubber. The inner wall of the sealing bushing 3 is tightly fitted to the outer wall of the adjusting shaft 1, which isolates the damping oil 110 inside the Green assembly 104 and prevents the damping oil from leaking from the side through hole.

[0029] Through the above technical solution, an oil seal 103 is installed between the center hole of the Green assembly 104 and the piston rod assembly 101. The oil seal 103 provides a reliable radial dynamic seal under the high-frequency, reciprocating sliding condition of the piston rod assembly 101, preventing the high-pressure damping oil 110 in the inner oil pipe 106 from leaking outward from the outer oil pipe cover 102 position, thus ensuring the basic working life and cleanliness of the damper. The adjusting shaft 1 passes through the side wall of the Green assembly 104, and a press-fitted sealing bushing 3 is used to achieve sealing. The sealing bushing 3 is made of oil-resistant rubber, and its inner wall is tightly fitted with the outer wall of the adjusting shaft 1 to form a static and micro-dynamic sealing surface, effectively isolating the oil inside the Green assembly 104 and preventing the damping oil 110 from leaking out from the side mounting through hole. The sealing structure is simple and reliable, and does not affect the flexible rotation of the adjusting shaft 1, ensuring the unity of side adjustment function and sealing performance.

[0030] Although embodiments of the 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, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A seat damper with adjustable side damping force, characterized in that, Includes piston rod assembly (101), outer oil pipe cap (102), oil seal (103), Green assembly (104), adjusting rod assembly (105), inner oil pipe (106), recovery valve assembly (107), compression valve assembly (108), outer oil pipe assembly (109), and damping oil (110). The outer oil pipe assembly (109) is equipped with an outer oil pipe cap (102) and a compression valve assembly (108) at both ends, respectively. An inner oil pipe (106) is coaxially arranged inside the outer oil pipe assembly (109), and the two ends of the inner oil pipe (106) are connected to the Green assembly (104) and the recovery valve assembly (107) respectively. The piston rod assembly (101) passes through the outer oil pipe cover (102) and the Green assembly (104) and extends into the inner oil pipe (106). The end of the piston rod assembly (101) is connected to the adjusting rod assembly (105). The Green Assembly (104) is laterally integrated with a side-mounted damping adjustment mechanism, which includes an adjustment shaft, an adjustment valve core, a sealing bushing, and an adjustment knob. A side mounting through hole is opened on the side wall of the Green Assembly (104), the sealing bushing is press-fitted into the through hole, the adjustment shaft passes through the sealing bushing and can rotate circumferentially, the outer end of the adjustment shaft extends out of the outside of the Green Assembly (104) and is equipped with an adjustment knob, and the inner end of the adjustment shaft is fixedly connected to the adjustment valve core. The Green assembly (104) has a main oil passage that connects the inner cavity of the inner oil pipe (106) with the outer oil pipe assembly (109). The regulating valve core has a throttling hole a on its side wall. The Green assembly (104) has throttling holes b, d and e formed inside. Rotating the regulating shaft can change the overlapping oil passage cross-sectional area of ​​the throttling hole a and the main oil passage, change the flow resistance of the damping oil (110), and realize the adjustable damping force.

2. The seat damper with adjustable side damping force according to claim 1, characterized in that: The side-mounted damping adjustment mechanism is an independent modular detachable component. The adjustment valve core, adjustment shaft, sealing bushing, adjustment knob and piston rod assembly (101), and adjustment rod assembly (105) are set separately and can be disassembled and replaced individually.

3. The seat damper with adjustable side damping force according to claim 1, characterized in that: The side-mounted damping adjustment mechanism is located at the middle of the damper's axial Green assembly (104). The adjustment knob protrudes only laterally along the radial direction of the outer oil pipe assembly (109) and does not exceed the axial height range of the hinged installation positions at both ends of the outer oil pipe assembly (109), thus not occupying the vertical installation space of the seat.

4. The seat damper with adjustable side damping force according to claim 1, characterized in that: The outer wall of the regulating valve core is provided with a throttling orifice a with a continuously gradually changing opening. As the regulating shaft rotates circumferentially, the cross-sectional area of ​​the oil passage in the throttling orifice a changes continuously, thereby realizing stepless continuous adjustment of the damping force.

5. The seat damper with adjustable side damping force according to claim 1, characterized in that: When the damper returns to its original stroke, the piston rod assembly (101) extends outward, the oil pressure in the rod chamber of the inner oil pipe (106) increases, and the damping oil (110) flows from the rod chamber into the inner cavity of the Green assembly (104), and then flows through the throttle hole a, throttle hole b, d channel and e channel in sequence into the jacket of the outer oil pipe assembly (109).

6. The seat damper with adjustable side damping force according to claim 1, characterized in that: During the compression stroke of the damper, the piston rod assembly (101) contracts inward, the oil pressure in the rodless chamber of the inner oil pipe (106) increases, the damping oil (110) passes through the recovery valve assembly (107) and enters the rod chamber, and the excess damping oil (110) in the working chamber enters the throttle orifice a along the inner cavity of the Green assembly (104), and then flows into the outer oil pipe assembly (109) interlayer through the throttle orifice b, d channel and e channel.

7. The seat damper with adjustable side damping force according to claim 1, characterized in that: An oil seal (103) is installed between the center hole of the Green assembly (104) and the piston rod assembly (101). The oil seal (103) achieves radial sealing during the reciprocating sliding process of the piston rod assembly (101) to prevent damping oil (110) from leaking out from the outer oil pipe cover (102).

8. The seat damper with adjustable side damping force according to claim 1, characterized in that: The sealing bushing is made of oil-resistant rubber. The inner wall of the sealing bushing is tightly fitted to the outer wall of the adjusting shaft to isolate the damping oil (110) inside the Green assembly (104) and prevent the damping oil from leaking from the side through hole.

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