Single cylinder nitrogen bag limited flow type damping force adjustable shock absorber

Abstract

The utility model discloses a single cylinder nitrogen gas bag flow limiting type damping force value adjustable shock absorber. The shock absorber includes cylinder, high pressure hose, adjustable nitrogen gas bag, and the oil outlet end of adjustable nitrogen gas bag is connected the rodless chamber of cylinder through high pressure hose. Hollow piston rod is equipped in the cylinder, and it is slidably connected with the cylinder through the piston. Hollow piston rod is equipped with the through hole that penetrates along the axial communication and the rodless chamber, and the one end of adjusting knob in the through hole is connected adjusting connecting rod through bolt, and the other end of adjusting connecting rod is connected taper plug, and sealing device is equipped between taper plug and through hole. Hollow piston rod is equipped with overflow hole that communicates through hole and rod chamber, and the piston end through hole of hollow piston rod is equipped with inner boss step, and inner boss step and taper plug cooperate and form the flow valve between rodless chamber and rod chamber. The utility model realizes the two -way regulation of compression and recovery damping force, improves the adaptability of vehicle to different road conditions, and simple structure, low manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of vibration damper technology, specifically to a single-cylinder nitrogen-filled flow-limiting adjustable damping force vibration damper. Background Technology

[0002] Existing monotube shock absorbers mostly employ piston valve systems and floating piston structures, with damping force generated by valve plate deformation. This results in a single damping force value and an inability to adapt to complex road conditions, severely impacting ride comfort. Therefore, some adjustable damping shock absorbers have emerged in the market. Chinese utility model patent application CN202422657491.9 discloses an adjustable monotube shock absorber with a nitrogen tank, mainly comprising a shock absorber body and a nitrogen tank. The nitrogen tank is connected to the shock absorber body via a high-pressure oil circuit. Inside the nitrogen tank are an adjusting valve base, an adjusting knob, and an adjusting valve core. The adjusting valve core has multiple oil drain grooves of different sizes on its outer side. This device adjusts the damping force during compression by rotating the adjusting knob to rotate the adjusting valve core, thereby changing the flow area of ​​the oil drain grooves. However, such an adjustment mechanism can only achieve damping adjustment in one direction and lacks adjustment for the restoring damping force.

[0003] Therefore, it is necessary to provide a single-cylinder nitrogen-filled flow-limiting damping force adjustable vibration damper to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a single-cylinder nitrogen-filled flow-limited adjustable damping force damper that can flexibly adjust both compression and recovery damping forces in both directions.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A single-cylinder nitrogen-filled flow-limited adjustable damping force vibration damper includes a cylinder, a high-pressure hose, and an adjustable nitrogen filler. The oil outlet of the adjustable nitrogen filler is connected to the rodless chamber of the cylinder via the high-pressure hose. A hollow piston rod is provided inside the cylinder and is slidably connected to the cylinder via a piston. The hollow piston rod is provided with a limiting ring located in the rod chamber. A through hole is provided axially along the hollow piston rod and communicates with the rodless chamber. An adjustment knob is provided at the rod end of the hollow piston rod and is located in the through hole of the piston rod. One end of the internal assembly is connected to the adjusting rod via bolts. The adjusting knob and bolts are connected by threads. One end of the adjusting rod is connected to the bolts, and the other end is connected to a conical plug. A sealing device is provided between the conical plug and the through hole to prevent hydraulic oil from leaking towards the adjusting rod. The hollow piston rod is provided with an overflow hole that connects the through hole and the rod chamber. The overflow hole is located between the piston and the limit ring. The through hole at the piston end of the hollow piston rod has an inwardly protruding step. The step and the conical plug cooperate to form a flow valve between the rodless chamber and the rod chamber. When the adjusting knob is rotated, the bolt connected to it will push the adjusting rod to move, which in turn will push the conical plug to move, thereby changing the throttling area between the conical plug and the step. This allows for flexible control of the oil flow rate, ultimately achieving an adjustable restoring damping force.

[0007] Preferably, the rod chamber of the cylinder is provided with a guide that cooperates with the hollow piston rod.

[0008] Preferably, a hollow bolt is provided in the through hole at the piston end of the hollow piston rod, and the hollow bolt has a central through hole along the axis, forming an inwardly protruding step in the through hole.

[0009] Preferably, the adjustable nitrogen tank has a nitrogen tank end cap at the nitrogen end, a floating piston in the middle of the adjustable nitrogen tank, nitrogen filling the space between the floating piston and the end cap, and an adjuster at the oil outlet end of the adjustable nitrogen tank.

[0010] Compared with the prior art, this utility model has the following advantages: by setting a hollow piston rod, an additional oil drain passage is added, which realizes the adjustment of the recovery damping force. In addition, the adjustable nitrogen tank realizes the adjustment of the compression damping force. Therefore, this utility model realizes the bidirectional flexible adjustment of compression and recovery damping forces, which improves the vehicle's adaptability to different road conditions, driving stability and ride comfort. Furthermore, this utility model has a simple structure, is easy to implement, and has low manufacturing cost. Attached Figure Description

[0011] Figure 1 This is a structural schematic diagram of the present invention.

[0012] Figure 2 This is a structural schematic diagram of the hollow piston rod and its connecting components of this utility model.

[0013] Figure 3 This is an enlarged structural schematic diagram of the adjusting knob and bolt of this utility model.

[0014] Figure 4 This is an enlarged structural schematic diagram of the conical plug and contact components of this utility model.

[0015] Among them, 1-cylinder, 101-rodless chamber, 102-rod chamber, 2-high pressure hose, 3-adjustable nitrogen tank, 4-hollow piston rod, 41-limiting retaining ring, 42-through hole, 5-piston, 6-adjusting knob, 7-bolt, 8-adjusting connecting rod, 9-conical plug, 10-sealing device, 11-overflow hole, 12-step, 13-guide, 14-hollow bolt, 141-central through hole, 31-end cap, 32-floating piston, 33-adjuster. Detailed Implementation

[0016] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixed connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] In this utility model, terms such as "upper", "lower", "bottom", and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of the structural relationship between the various components or elements of this utility model and do not specifically refer to any component or element in this utility model. They should not be construed as limiting this utility model.

[0019] like Figures 1 to 4As shown, a single-cylinder nitrogen-filled flow-limiting adjustable damping force vibration damper includes a cylinder 1, a high-pressure hose 2, and an adjustable nitrogen filler 3. The oil outlet of the adjustable nitrogen filler 3 is connected to the rodless chamber 101 of the cylinder 1 via the high-pressure hose 2. A hollow piston rod 4 is provided inside the cylinder 1, and a guide 13 that cooperates with the hollow piston rod 4 is provided inside the rod chamber 102 of the cylinder 1. The hollow piston rod 4 is slidably connected to the cylinder 1 via the piston 5. The hollow piston rod 4 is provided with a limiting retaining ring 41, which is located within the rod chamber 102. The hollow piston rod 4 has an axially extending through hole 42, which communicates with the rodless chamber 101. The rod end of the hollow piston rod 4 is provided with an adjusting knob 6 (model RCKT01). One end of the adjusting knob 6, located inside the piston rod through hole 42, is connected to an adjusting connecting rod 8 via a bolt 7. The adjusting knob 6 and the bolt 7 are connected by threads. One end of the adjusting connecting rod 8 is connected to the bolt 7, and the other end… A conical plug 9 is connected, and a sealing device 10 is provided between the conical plug 9 and the through hole 42. The sealing device 10 consists of two O-rings spaced apart on the conical plug to prevent hydraulic oil from leaking towards the adjusting rod. The hollow piston rod 4 is provided with an overflow hole 11 that connects the through hole 42 and the rod chamber 102. The overflow hole 11 is located between the piston 5 and the limiting retaining ring 41. The through hole 42 at the piston end of the hollow piston rod 4 is provided with an inwardly protruding step 12. The step 12 and the conical plug 9 cooperate with each other to form a flow valve between the rodless chamber 101 and the rod chamber 102. A hollow bolt 14 is provided in the through hole 42 at the piston end of the hollow piston rod 4. The hollow bolt 14 is provided with a central through hole 141 along the axis, and the hollow bolt 14 forms the inwardly protruding step 12 in the through hole 42. The adjustable nitrogen tank has a nitrogen tank end cap 31 at the nitrogen end, a floating piston 32 in the middle of the adjustable nitrogen tank, nitrogen gas filling the space between the floating piston 32 and the end cap 31, and an adjuster 33 at the oil outlet end of the adjustable nitrogen tank.

[0020] The principle and usage of a single-cylinder nitrogen-filled flow-limiting adjustable damping force vibration damper:

[0021] When the shock absorber is stretched, an additional oil drain passage 42 is added. By rotating the adjusting knob 6, the position of the adjusting linkage 8 is adjusted via the bolt 7, thereby pushing the conical plug 9 to move and changing the throttling area between the conical plug 9 and the step 12. This allows for flexible control of the oil flow rate, achieving adjustment of the restoring damping force. Chinese Utility Model Patent Application Publication CN202422657491.9 discloses a single-tube shock absorber with adjustable damping and a nitrogen tank. This device uses a rotating adjusting knob to rotate the adjusting valve core, thereby changing the flow area of ​​the oil drain groove to adjust the damping force value during compression. This utility model uses an adjusting regulator 33 to control the flow rate of compressed oil diverted from the cylinder 1 into the adjustable nitrogen tank 3, thereby achieving flexible adjustment of the compression damping force value. This utility model can bidirectionally adjust the restoring damping force and the compression damping force, improving the vehicle's adaptability to different road conditions, driving stability, and ride comfort.

[0022] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A single-cylinder nitrogen-filled flow-limited adjustable damping force shock absorber, comprising a cylinder (1), a high-pressure hose (2), and an adjustable nitrogen filler (3), wherein the oil outlet of the adjustable nitrogen filler (3) is connected to the rodless chamber (101) of the cylinder (1) via the high-pressure hose (2), characterized in that: The cylinder (1) is provided with a hollow piston rod (4), which is slidably connected to the cylinder (1) via a piston (5). The hollow piston rod (4) is provided with a limiting retaining ring (41), which is located in the rod chamber (102). The hollow piston rod (4) is provided with a through hole (42) along the axial direction, which communicates with the rodless chamber (101). The rod end of the hollow piston rod (4) is provided with an adjusting knob (6). One end of the adjusting knob (6) located inside the piston rod through hole (42) is connected to the adjusting connecting rod (8) via a bolt (7). The adjusting knob (6) and the bolt (7) are connected by threads. One end of the connecting rod (8) is connected to the bolt (7), and the other end is connected to the conical plug (9). A sealing device (10) is provided between the conical plug (9) and the through hole (42) to prevent hydraulic oil from leaking towards the adjusting rod. The hollow piston rod (4) is provided with an overflow hole (11) that connects the through hole (42) and the rod chamber (102). The overflow hole (11) is located between the piston (5) and the limiting ring (41). The through hole (42) at the piston end of the hollow piston rod (4) is provided with an inwardly protruding step (12). The step (12) and the conical plug (9) cooperate with each other to form a flow valve between the rodless chamber (101) and the rod chamber (102).

2. The single cylinder nitrogen gas bag flow-restricted damping force adjustable shock absorber according to claim 1, characterized in that: The cylinder (1) has a guide (13) in the rod chamber (102) that cooperates with the hollow piston rod (4).

3. The single cylinder nitrogen gas bladder flow-restricted damping force adjustable shock absorber of claim 1, wherein: The hollow piston rod (4) has a hollow bolt (14) in the through hole (42) at the piston end. The hollow bolt (14) has a central through hole (141) along the axis. The hollow bolt (14) forms an inwardly protruding step (12) in the through hole (42).

4. The single cylinder nitrogen gas bladder flow-restricted damping force adjustable shock absorber of claim 1, wherein: The adjustable nitrogen tank has a nitrogen tank end cap (31) at the nitrogen end, a floating piston (32) in the middle of the adjustable nitrogen tank, nitrogen gas between the floating piston (32) and the end cap (31), and an adjuster (33) at the oil outlet end of the adjustable nitrogen tank.

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