Damper adjustment mechanism for a shock absorber

Abstract

Disclosed is a damping adjustment mechanism of a shock absorber, which comprises a piston rod arranged in a main cylinder, a connecting sleeve detachably connected to the other end of the piston rod, a first through hole axially formed in the piston rod, a plunger arranged in the first through hole, one end of the plunger arranged in the connecting sleeve, a valve needle fixed to the other end of the plunger, a damping adjustment tube arranged beside the valve needle, the damping adjustment tube fixed in the first through hole of the piston rod, a tapered head part of the valve needle arranged in the damping adjustment tube, a second through hole formed in the side wall of the piston rod at the valve needle, a knob nut screwed on the connecting sleeve, a long through hole radially formed in the side wall of the connecting sleeve, an annular notch formed in the inner wall of the knob nut, a roller arranged in the long through hole of the connecting sleeve, the two ends of the roller arranged in the annular notch of the knob nut, and one end of the plunger capable of abutting against the side surface of the roller. The damping adjustment mechanism enables the roller forming the gear to be arranged at the outer end of the piston rod, which is arranged outside the main cylinder, so that the outer end is convenient for assembly and maintenance.

Description

Technical Field

[0001] This utility model belongs to the field of shock absorber technology, specifically relating to a damping adjustment mechanism for a shock absorber. Background Technology

[0002] The shock absorbers of a car are responsible for cushioning impacts and damping shocks. In areas with complex road conditions, it is often necessary to adjust the damping of the shock absorbers in a timely manner according to the road conditions in order to achieve the best driving experience.

[0003] The Chinese patent with publication number CN218440387U is a shock absorber gear adjustment structure previously designed by our company. The steel ball and extension spring that form the gear are located in the lower part of the piston rod through hole, which is also located in the oil cylinder of the shock absorber. This makes it difficult to assemble and maintain. Utility Model Content

[0004] In view of the defects of the existing shock absorber gear adjustment structure, this utility model discloses another damping adjustment mechanism for shock absorbers, which includes a piston rod, a shock absorber piston, a main cylinder, a connecting sleeve, a top column, a valve needle, a damping adjustment tube, a knob nut, and rollers;

[0005] One end of the piston rod, which is fixedly connected to the shock-absorbing piston, is located inside the main cylinder. The other end of the piston rod is detachably connected to a connecting sleeve. The connecting sleeve is coaxial with the piston rod and is specifically detachably connected by a threaded connection.

[0006] The piston rod has a first through hole axially, and a top post is installed in the first through hole of the piston rod. The top post can slide in the first through hole of the piston rod. One end of the top post is located in the connecting sleeve, and the other end of the top post is fixedly connected to a valve needle. Specifically, the top post and the valve needle are integrally connected. The valve needle is also located in the first through hole of the piston rod. A damping adjustment tube is also provided next to the valve needle. The damping adjustment tube is fixedly connected in the first through hole of the piston rod. The conical head of the valve needle is located in the damping adjustment tube. The side wall of the piston rod has at least one second through hole at the valve needle. Of course, the second through hole communicates with the first through hole. When the shock absorber is compressed, the hydraulic oil in the main cylinder can enter the first through hole of the piston rod from one side of the shock absorber piston through the damping adjustment tube, and finally flow from the second through hole of the piston rod to the other side of the shock absorber piston. By changing the depth of the conical head of the valve needle in the damping adjustment tube, the oil flow of the damping adjustment tube is changed, thereby adjusting the damping of the shock absorber.

[0007] The outer surface of the connecting sleeve is threaded, and the knob nut is screwed onto the connecting sleeve. A through hole is radially formed on the side wall of the connecting sleeve, and an annular groove is formed on the inner wall of the knob nut. The middle part of the roller is positioned within the through hole of the connecting sleeve, and both ends of the roller are located within the annular grooves of the knob nut. Due to the presence of hydraulic oil in the main cylinder, the oil pressure applies pressure to the valve needle (top pin) along the damping adjustment pipe, allowing the end of the top pin located within the connecting sleeve to abut against the side of the roller. Thus, when the knob nut is turned, the roller, pushed by the annular groove, can move along the connecting sleeve... As the sleeve rolls along the long through hole, the position of the top pin changes accordingly. The depth of the conical head of the valve needle in the damping adjustment tube can be adjusted by turning the knob nut, thereby achieving damping adjustment of the shock absorber. Since the top pin is pressed against the roller under hydraulic pressure for a long time, and the roller in turn presses against the knob nut through the annular groove, the knob nut screwed on the connecting sleeve can maintain a strong tightening force to form the tightening force of the damping position. The damping position will not change due to vibration. This effect can be achieved by using the hydraulic pressure inside the main cylinder without the need for additional parts, resulting in low manufacturing cost.

[0008] Furthermore, a floating piston is also provided in the main cylinder body. The floating piston and the bottom of the main cylinder body form an air chamber. Pressurized gas is injected into the air chamber. In addition to further improving the shock absorption effect of the shock absorber, the gas pressure in the air chamber can apply pressure to the hydraulic oil through the floating piston, thereby increasing the oil pressure effect of the top column on the roller, and further enhancing the fastening force of the knob screw on the connecting sleeve.

[0009] Furthermore, a sealing ring is fitted on the end of the top column near the valve needle. The sealing ring is located in the first through hole of the piston rod to form a seal, preventing the hydraulic oil in the main cylinder from leaking to the connecting sleeve along the first through hole of the piston rod.

[0010] Preferably, a third through hole is provided on the side wall of the knob nut, and a plug is detachably connected in the third through hole. The third through hole is used to place the roller into the long through hole of the connecting sleeve during the assembly of the shock absorber, or to remove it from there during maintenance.

[0011] Preferably, the width of the annular groove is greater than the diameter of the roller, and the two ends of the roller are arc surfaces. The former allows the roller to have gaps for rolling, while the latter reduces the contact area with the annular groove to reduce the friction during rolling.

[0012] Through the above technical solutions, this utility model has at least the following beneficial effects:

[0013] The damping adjustment mechanism of the shock absorber described in this application, through the cooperative design of structural components such as piston rod, main cylinder, connecting sleeve, top column, valve needle, damping adjustment tube, knob nut and roller, allows the roller that forms the gear to be located at the outer end of the piston rod, which is located outside the main cylinder, making it convenient for assembly and maintenance.

[0014] In addition, since the top column holds the roller under hydraulic pressure for a long time, and the roller holds the knob nut through the annular groove, the knob nut screwed on the connecting sleeve can maintain a strong tightening force to form the tightening force of the gear. The damping gear will not change due to vibration. This effect can be achieved by using the hydraulic pressure inside the main cylinder without the need for additional parts, which reduces the manufacturing cost. Attached Figure Description

[0015] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of this utility model in a schematic manner. Therefore, they only show the components related to this utility model.

[0016] Figure 1 This is a schematic diagram of the overall structure of the shock absorber described in the embodiments of this application;

[0017] Figure 2 This is a cross-sectional view of the shock absorber described in the embodiments of this application. Detailed Implementation

[0018] In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms describing positional relationships are for illustrative purposes only and should not be construed as limiting this patent. If terms such as "first" and "second" are used for descriptive purposes only, they should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of the stated features. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0019] In the description of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] refer to Figure 1 and Figure 2 A damping adjustment mechanism for a shock absorber includes a piston rod 1, a shock absorber piston 2, a main cylinder 3, a connecting sleeve 4, a top column 5, a valve needle 6, a damping adjustment tube 7, a knob nut 8, and a roller 9.

[0021] The piston rod 1 is fixedly connected to one end of the shock-absorbing piston 2 and is located inside the main cylinder 3. The other end of the piston rod 1 is detachably connected to a connecting sleeve 4. The connecting sleeve 4 is coaxial with the piston rod 1 and is specifically detachably connected by a threaded connection.

[0022] The piston rod 1 has a first through hole 101 axially. A top post 5 is disposed within the first through hole 101 of the piston rod 1. The top post 5 can slide within the first through hole 101 of the piston rod 1. One end of the top post 5 is located inside the connecting sleeve 4, and the other end of the top post 5 is fixedly connected to a valve needle 6. Specifically, the top post 5 and the valve needle 6 are integrally connected. The valve needle 6 is also located within the first through hole 101 of the piston rod 1. A damping adjustment tube 7 is also disposed beside the valve needle 6. The damping adjustment tube 7 is fixedly connected within the first through hole 101 of the piston rod 1. The conical head portion of the valve needle 6 is located within... Inside the damping adjustment tube 7, at least one second through hole 102 is provided on the side wall of the piston rod 1 at the valve needle 6. Of course, the second through hole 102 is connected to the first through hole 101. When the shock absorber is compressed, the hydraulic oil in the main cylinder 3 can enter the first through hole 101 of the piston rod 1 from one side of the shock absorber piston 2 through the damping adjustment tube 7, and finally flow from the second through hole 102 of the piston rod 1 to the other side of the shock absorber piston 2. By changing the depth of the conical head of the valve needle 6 in the damping adjustment tube 7, the oil flow of the damping adjustment tube 7 is changed, thereby adjusting the damping of the shock absorber.

[0023] The outer surface of the connecting sleeve 4 is threaded, and the knob nut 8 is screwed onto the thread of the connecting sleeve 4. A long through hole 401 is radially formed on the side wall of the connecting sleeve 4, and an annular groove 801 is formed on the inner wall of the knob nut 8. The middle part of the roller 9 is located within the long through hole 401 of the connecting sleeve 4, and both ends of the roller 9 are located within the annular groove 801 of the knob nut 8. Due to the presence of hydraulic oil in the main cylinder 3, the oil pressure applies pressure to the valve needle 6, i.e., the top post 5, along the damping adjustment pipe 7, so that one end of the top post 5 located inside the connecting sleeve 4 can abut against the side of the roller 9. Thus, when the knob nut 8 is turned, the roller 9 moves within the annular groove 801... Driven by the roller, the roller 9 can roll along the long through hole 401 of the connecting sleeve 4, and the position of the top column 5 changes accordingly. The depth of the conical head of the valve needle 6 in the damping adjustment tube 7 can be adjusted by the knob nut 8, thereby realizing the damping adjustment of the shock absorber. Since the top column 5 is pressed against the roller 9 for a long time under oil pressure, and the roller 9 presses against the knob nut 8 through the annular groove 801, the knob nut 8 screwed on the connecting sleeve 4 can maintain a strong fastening force to form the fastening force of the gear. The damping gear will not change due to vibration. This effect can be achieved by using the oil pressure in the main cylinder 3 without the need for additional parts, which reduces the manufacturing cost.

[0024] refer to Figure 2 The main cylinder 3 is also equipped with a floating piston 10. The floating piston 10 and the bottom of the main cylinder 3 form an air chamber 1001. Pressurized gas is injected into the air chamber 1001. In addition to further improving the shock absorption effect of the shock absorber, the gas pressure in the air chamber 1001 can apply pressure to the hydraulic oil through the floating piston 10, thereby increasing the oil pressure effect of the top column 5 on the roller 9, and further enhancing the fastening force of the knob screw on the connecting sleeve 4.

[0025] The top column 5 is fitted with a sealing ring 11 at the end near the valve needle 6. The sealing ring 11 is located in the first through hole 101 of the piston rod 1 to form a seal, preventing the hydraulic oil in the main cylinder 3 from leaking to the connecting sleeve 4 along the first through hole 101 of the piston rod 1.

[0026] The knob nut 8 has a third through hole 803 on its side wall. A plug is detachably connected to the third through hole 803. The third through hole 803 is used to place the roller 9 into the long through hole 401 of the connecting sleeve 4 during the assembly of the shock absorber, or to remove it from there during maintenance.

[0027] The width of the annular groove 801 is greater than the diameter of the roller 9. The two ends of the roller 9 are arc surfaces. The former allows the roller 9 to roll with gaps, while the latter reduces the contact area with the annular groove 801 to reduce the friction during rolling.

[0028] The damping adjustment mechanism of the aforementioned shock absorber, through the coordinated design of structural components such as piston rod 1, main cylinder 3, connecting sleeve 4, top column 5, valve needle 6, damping adjustment tube 7, knob nut 8, and roller 9, allows the roller 9, which forms the gear position, to be located at the outer end of piston rod 1. This location is outside the main cylinder 3, making it convenient for assembly and maintenance.

[0029] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Based on the present utility model and the above description, relevant personnel can make various changes and modifications without departing from the technical concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A damping adjustment mechanism for a shock absorber, characterized in that: It includes a piston rod (1), a shock-absorbing piston (2), a main cylinder (3), a connecting sleeve (4), a top column (5), a valve needle (6), a damping adjustment tube (7), a knob nut (8), and rollers (9); The piston rod (1) is fixedly connected to one end of the shock-absorbing piston (2) and is located inside the main cylinder (3). The other end of the piston rod (1) is detachably connected to the connecting sleeve (4). The piston rod (1) has a first through hole (101) axially. A top post (5) is provided in the first through hole (101) of the piston rod (1). One end of the top post (5) is located in the connecting sleeve (4). The other end of the top post (5) is fixedly connected to a valve needle (6). The valve needle (6) is also located in the first through hole (101) of the piston rod (1). A damping adjustment tube (7) is also provided next to the valve needle (6). The damping adjustment tube (7) is fixedly connected in the first through hole (101) of the piston rod (1). The conical head of the valve needle (6) is located in the damping adjustment tube (7). At least one second through hole (102) is provided on the side wall of the piston rod (1) at the valve needle (6). The outer side of the connecting sleeve (4) is threaded, and the knob nut (8) is screwed into the thread of the connecting sleeve (4). The side wall of the connecting sleeve (4) is radially provided with a long through hole (401). The inner wall of the knob nut (8) is provided with an annular retaining groove (801). The middle part of the roller (9) is located in the long through hole (401) of the connecting sleeve (4). The two ends of the roller (9) are located in the annular retaining groove (801) of the knob nut (8). The end of the top post (5) located in the connecting sleeve (4) can abut against the side of the roller (9).

2. The damping adjustment mechanism of a shock absorber according to claim 1, characterized in that: A floating piston (10) is also provided inside the main cylinder (3). The floating piston (10) and the bottom of the main cylinder (3) form a gas chamber (1001), and pressurized gas is injected into the gas chamber (1001).

3. The damping adjustment mechanism of a shock absorber according to claim 1, characterized in that: The top post (5) has a sealing ring (11) fitted on the end near the valve needle (6), and the sealing ring (11) is located in the first through hole (101) of the piston rod (1) to form a seal.

4. The damping adjustment mechanism of a shock absorber according to claim 1, characterized in that: The knob nut (8) has a third through hole (803) on its side wall, and a plug is detachably connected inside the third through hole (803).

5. The damping adjustment mechanism of a shock absorber according to claim 1, characterized in that: The width of the annular groove (801) is greater than the diameter of the roller (9), and the two ends of the roller (9) are arc surfaces.

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