Damping-adjustable shock absorber

Abstract

The utility model belongs to the technical field of shock absorbers, and discloses a damping-adjustable shock absorber which comprises a barrel and a piston rod, a circulation hole is formed in the surface of the piston rod, a flow limiting column and a positioning plate are vertically arranged on the inner wall of the piston rod in a sliding mode, an L-shaped circulation groove is formed in the surface of the flow limiting column, and a screw rod is fixedly connected to the top end of the flow limiting column. By rotating the piston rod, the first bevel gear drives the second bevel gear and the inner threaded pipe to rotate in the middle of the positioning plate, the screw rod and the flow limiting column are further driven to descend in the piston rod, at the moment, the bottom end of the flow limiting column extends downwards, and the bottom end of the L-shaped circulation groove also extends out of the bottom of the piston rod; and meanwhile, the top end of the flow limiting column is in contact with sealing of the convection through hole, so that the oil liquid can flow in the L-shaped circulation groove, the flow of the oil liquid is changed when the piston at the bottom end of the piston rod moves up and down, and personnel adjust the downward extending length of the flow limiting column according to rotation of the piston rod.

Description

Technical Field

[0001] The utility model belongs to the technical field of shock absorbers, and particularly relates to a shock absorber with adjustable damping. Background Technique

[0002] A shock absorber is used to suppress the oscillation when the spring rebounds after absorbing shock and the impact from the road surface. It is widely used in various vehicles to accelerate the attenuation of the vibration of the vehicle frame and body, so as to improve the ride comfort of the vehicle. When passing through an uneven road surface, although the shock-absorbing spring can filter the road vibration, the spring itself will still have reciprocating motion, and the shock absorber is used to suppress this spring jump.

[0003] According to the patent with the patent number CN219866031U, a novel shock absorber with adjustable damping is disclosed, which includes a shock absorber body with an internal damping cavity, a piston plate slidably connected in the damping cavity, and a piston rod fixedly connected to the piston plate. One end of the piston rod extends outside one end of the shock absorber body and is slidably connected to the shock absorber body. A plurality of fixing blocks are slidably connected horizontally on the shock absorber body. The plurality of fixing blocks are arranged vertically, and one end can slide into the damping cavity. A clamping block with one end located outside the fixing block is elastically connected reciprocally in the fixing block. A main clamping groove for the clamping block to enter is opened in the shock absorber body. A moving block is slidably connected relatively on the shock absorber body. One end of the moving block is fixedly connected to the clamping block, which can adjust the damping of the piston, thereby increasing the applicability of the shock absorber body and improving the matching effect of the shock absorber body.

[0004] Although the above disclosed device can change the piston stroke and thus adjust the damping, due to its many components, the manufacturing cost of this shock absorber is relatively high, and it is not conducive to the disassembly and maintenance of the components, thereby reducing the practicability of the shock absorber. Therefore, we provide a shock absorber with adjustable damping to solve the above problems. Content of the Utility Model

[0005] To solve the problems raised in the above background technique, the utility model provides a shock absorber with adjustable damping.

[0006] To achieve the above object, the utility model provides the following technical solution: a shock absorber with adjustable damping, which includes a cylinder body and a piston rod. A flow hole is opened on the surface of the piston rod. A flow-limiting column and a positioning plate are vertically slidably arranged on the inner wall of the piston rod. An L-shaped flow groove is opened on the surface of the flow-limiting column. A screw rod is fixedly connected to the top end of the flow-limiting column. A sealing plug is fixedly connected to the surface of the screw rod, and the sealing plug is slidably arranged in the piston rod. An internally threaded tube is rotatably connected to the middle of the positioning plate, and the internally threaded tube is threadedly sleeved on the surface of the screw rod. A transmission mechanism for rotating the internally threaded tube and a limiting mechanism for restricting the displacement of the positioning plate are arranged on the surface of the piston rod.

[0007] In the above technical solution, preferably, a limiting groove is formed at the top end of the piston rod, a limiting plate is fixedly connected to the top end of the screw rod, the surfaces of the limiting plate and the positioning plate slide in the limiting groove, and the limiting plate is located above the positioning plate.

[0008] In the above technical solution, preferably, the transmission mechanism includes a rotary handle and a second bevel gear. The rotary handle is rotatably connected to the surface of the piston rod. The second bevel gear is fixedly connected to the bottom end of the internally threaded tube, and the screw rod does not contact the second bevel gear. One end of the rotary handle extending into the piston rod is fixedly connected with a first bevel gear, and the first bevel gear meshes with the second bevel gear.

[0009] In the above technical solution, preferably, the limiting mechanism includes a plug rod. The plug rod is arranged through the surface of the piston rod. One end of the plug rod extending into the piston rod is located on the upper surface of the positioning plate. Both ends of the plug rod are fixedly connected with a tension spring, and one end of the tension spring is fixedly connected to the surface of the piston rod. One end of the plug rod extending into the piston rod is an inclined surface. Two plug rods are provided, and the two plug rods are symmetrical to each other.

[0010] In the above technical solution, preferably, the flow hole is located above the piston at the bottom end of the piston rod, the flow-limiting column is located at the bottom of the piston rod. Two flow holes and two L-shaped flow grooves are provided, and the two flow holes and the two L-shaped flow grooves are symmetrical to each other.

[0011] In the above technical solution, preferably, a sealing sleeve is arranged on the surface of the flow-limiting column, and the sealing sleeve is closely attached to the inner wall of the piston rod.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] Through the cooperative setting of the cylinder body, the piston rod, the flow hole, the flow-limiting column, the positioning plate, the L-shaped flow groove, the screw rod, the sealing plug, the internally threaded tube, the transmission mechanism and the limiting mechanism, the present utility model can rotate the piston rod to drive the first bevel gear to drive the second bevel gear and the internally threaded tube to rotate in the middle of the positioning plate, further driving the screw rod and the flow-limiting column to descend in the piston rod. At this time, the bottom end of the flow-limiting column will extend downward, and the bottom end of the L-shaped flow groove will also extend out of the bottom of the piston rod. At the same time, the top end of the flow-limiting column will also contact and seal the flow hole, enabling the oil to flow in the L-shaped flow groove, thereby changing the flow rate of the oil when the piston at the bottom end of the piston rod moves up and down. Personnel can adjust the length of the downward extension of the flow-limiting column according to the rotation of the piston rod to control the flow rate flowing in the L-shaped flow groove, thereby realizing the damping adjustment of the shock absorber. When the structure inside the piston rod needs to be disassembled and maintained, only the mounting head at the top needs to be removed, and then the components of the piston rod can be directly taken out, which is more convenient to operate, improves the practicability of the device, and the structure inside the piston rod is simple, having the effects of low manufacturing cost and convenient maintenance. Description of the Drawings

[0014] Figure 1 is a schematic structural view of the present utility model;

[0015] Figure 2 is a schematic internal structure view of the cylinder body of the present utility model;

[0016] Figure 3 is a schematic structural view of the piston rod of the present utility model;

[0017] Figure 4 is a partial front sectional view of the present utility model;

[0018] Figure 5 is a partial side sectional view of the present utility model;

[0019] Figure 6 is a schematic top structure view of the piston rod of the present utility model;

[0020] Figure 7 is a schematic structural view of the current-limiting column of the present utility model;

[0021] Figure 8 is a schematic structural view of the insertion rod of the present utility model;

[0022] Figure 9 of the present utility model Figure 4 is an enlarged schematic view of the structure at position A.

[0023] In the figure: 1. Cylinder body; 2. Piston rod; 3. Rotating handle; 4. Insertion rod; 5. Flow hole; 6. Current-limiting column; 7. L-shaped flow groove; 8. Screw; 9. Sealing plug; 10. Tension spring; 11. Limit groove; 12. First bevel gear; 13. Second bevel gear; 14. Positioning plate; 15. Internal thread pipe; 16. Limit plate. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Such as Figures 1 to 9As shown in the figure, the present utility model provides a shock absorber with adjustable damping, which includes a cylinder body 1 and a piston rod 2. A compression gasket and a rebound gasket are provided on the piston at the bottom end of the piston rod 2, and the cylinder body 1 and the piston rod 2 are existing mature technologies and will not be elaborated here. A flow hole 5 is provided on the surface of the piston rod 2. A flow-limiting column 6 and a positioning plate 14 are vertically slidably arranged on the inner wall of the piston rod 2. An L-shaped flow groove 7 is provided on the surface of the flow-limiting column 6. A screw rod 8 is fixedly connected to the top end of the flow-limiting column 6, so that the flow-limiting column 6, the positioning plate 14 and the screw rod 8 can only vertically slide within the piston rod 2. A sealing plug 9 is fixedly connected to the surface of the screw rod 8, and the sealing plug 9 is slidably arranged within the piston rod 2. The sealing plug 9 ensures the sealing inside the piston rod 2 and prevents the oil fluid in the cylinder body 1 from entering the upper part inside the piston rod 2 through the flow hole 5. A threaded inner tube 15 is rotatably connected to the middle of the positioning plate 14, and the threaded inner tube 15 is threadedly sleeved on the surface of the screw rod 8. A transmission mechanism for rotating the threaded inner tube 15 and a limiting mechanism for restricting the displacement of the positioning plate 14 are provided on the surface of the piston rod 2. Through the setting of the transmission mechanism, it is convenient for personnel to control the rotation of the threaded inner tube 15 outside the piston rod 2, and further control the lifting of the screw rod 8. Through the setting of the limiting mechanism, the stability of the positioning plate 14 after being placed inside the piston rod 2 is ensured, and it will not move, thereby facilitating the control of the lifting of the flow-limiting column 6. Through the setting of the above structure, when it is necessary to adjust the piston damping on the piston rod 2, only need to rotate the piston rod 2, so that the first bevel gear 12 drives the second bevel gear 13 and the threaded inner tube 15 to rotate in the middle of the positioning plate 14, further driving the screw rod 8 and the flow-limiting column 6 to descend inside the piston rod 2. At this time, the bottom end of the flow-limiting column 6 will extend downward, and the bottom end of the L-shaped flow groove 7 will also extend out of the bottom of the piston rod 2. At the same time, the top end of the flow-limiting column 6 will also contact and seal the flow hole 5, so that the oil fluid can enter below the sealing plug 9 through the flow hole 5 and flow through the L-shaped flow groove 7. The length of the downward extension of the flow-limiting column 6 can be adjusted according to the rotation of the piston rod 2, and the flow rate flowing in the L-shaped flow groove 7 can be controlled, thereby changing the flow rate when the piston at the bottom end of the piston rod 2 ascends and descends in the cylinder body 1. When the downward extended part of the L-shaped flow groove 7 is more, the oil fluid passing speed increases, and on the contrary, the oil fluid passing speed decreases.

[0026] As Figure 6 shown, a limiting groove 11 is provided at the top end of the piston rod 2. A limiting plate 16 is fixedly connected to the top end of the screw rod 8. The surfaces of the limiting plate 16 and the positioning plate 14 are both slid within the limiting groove 11, and the limiting plate 16 is located above the positioning plate 14. Through the setting of the above structure, the positioning plate 14 and the screw rod 8 can only vertically slide within the piston rod 2 and will not rotate, and it is also convenient to take out the components inside the piston rod 2. The structure inside the piston rod 2 is simple, with low manufacturing cost and convenient maintenance.

[0027] As Figure 9As shown, the transmission mechanism includes a turning handle 3 and a second bevel gear 13, the turning handle 3 is rotatably connected to the surface of the piston rod 2, the second bevel gear 13 is fixedly connected to the bottom end of the internal threaded tube 15, and the screw rod 8 does not contact the second bevel gear 13, and the turning handle 3 extends to one end of the piston rod 2 and is fixedly connected to the first bevel gear 12, and the first bevel gear 12 is meshed with the second bevel gear 13. Through the setting of the above structure, when it is necessary to adjust the lifting and lowering of the flow limiting column 6 in the piston rod 2, it is only necessary to rotate the turning handle 3 to make the turning handle 3 drive the first bevel gear 12, and further drive the second bevel gear 13 and the internal threaded tube 15 to rotate in the middle part of the positioning plate 14. Since the screw rod 8 is threadedly connected to the internal threaded tube 15 and the positioning plate 14 is in a fixed position, it can smoothly drive the screw rod 8 to move up and down, and the screw rod 8 can only slide up and down in the piston rod 2 and will not rotate, thereby controlling the position adjustment of the flow limiting column 6 at the flow hole 5 to achieve the damping adjustment of the piston at the bottom end of the piston rod 2.

[0028] like Figure 6 , Figure 8 and Figure 9 As shown, the limiting mechanism includes an insertion rod 4, which is arranged on the surface of the piston rod 2. One end of the insertion rod 4 extending into the piston rod 2 is located on the upper surface of the positioning plate 14. Both ends of the insertion rod 4 are fixedly connected with a tension spring 10, and one end of the tension spring 10 is fixedly connected to the surface of the piston rod 2. One end of the insertion rod 4 extending into the piston rod 2 is an inclined surface. Two insertion rods 4 are provided, and the two insertion rods 4 are symmetrical to each other. Through the arrangement of the above structure, it is convenient to position and fix the positioning plate 14 to prevent the positioning plate 14 from moving upward, and the positioning plate 1 4 is also more convenient when installed in the piston rod 2, so that the bottom surface of the positioning plate 14 will squeeze the inclined surface on the insertion rod 4, and then when the positioning plate 14 is finally located below the insertion rod 4, the elastic force of the tension spring 10 can be used to make the insertion rod 4 position and block the positioning plate 14. When the positioning plate 14 needs to be taken out from the piston rod 2, it is only necessary to pull the insertion rod 4 out of the piston rod 2 to release the positioning of the positioning plate 14, and then the positioning plate 14 can be pulled out from the top of the piston rod 2, so that the components in the piston rod 2 can be maintained, thereby improving the practicality of the device.

[0029] like Figure 2 , Figure 3 , Figure 5 and Figure 7As shown, the flow hole 5 is located above the piston at the bottom end of the piston rod 2, and the flow-limiting column 6 is located at the bottom of the piston rod 2, enabling the flow-limiting column 6 to seal the bottom of the piston rod 2. When the flow-limiting column 6 descends, a part of the side of the L-shaped flow groove 7 extends out of the bottom of the piston rod 2. At this time, the top end of the flow-limiting column 6 will also release the seal of the flow hole 5, allowing the oil to flow in the L-shaped flow groove 7, thereby changing the flow rate of the oil when the piston at the bottom end of the piston rod 2 moves up and down, and further adjusting the damping of the shock absorber. Both the flow hole 5 and the L-shaped flow groove 7 are provided in two, and the two flow holes 5 and the two L-shaped flow grooves 7 are symmetric with each other.

[0030] As Figure 4 and Figure 5 shown, a sealing sleeve is provided on the surface of the flow-limiting column 6, and the sealing sleeve is closely attached to the inner wall of the piston rod 2. With the sealing sleeve, the sealing performance between the flow-limiting column 6 and the piston rod 2 can be ensured. When the piston rod 2 moves up and down in the cylinder body 1, the oil in the cylinder body 1 will not enter the piston rod 2.

[0031] The working principle and usage process of the present utility model: When it is necessary to adjust the piston damping on the piston rod 2, only need to rotate the piston rod 2, so that the first bevel gear 12 drives the second bevel gear 13 and the internally threaded tube 15 to rotate in the middle of the positioning plate 14, further driving the screw rod 8 and the flow-limiting column 6 to descend in the piston rod 2. At this time, the bottom end of the flow-limiting column 6 will extend downward, and the bottom end of the L-shaped flow groove 7 also extends out of the bottom of the piston rod 2. At the same time, the top end of the flow-limiting column 6 will also contact and release the seal of the flow hole 5, allowing the oil to flow in the L-shaped flow groove 7, thereby changing the flow rate of the oil when the piston at the bottom end of the piston rod 2 moves up and down. The operator adjusts the length of the downward extension of the flow-limiting column 6 according to the rotation of the piston rod 2, controls the flow rate flowing in the L-shaped flow groove 7, thereby changing the flow rate when the piston at the bottom end of the piston rod 2 moves up and down in the cylinder body 1. When the part of the L-shaped flow groove 7 extending downward is more, the oil passing speed increases, and conversely, the oil passing speed decreases, so that the damping adjustment of the shock absorber can be realized. And when the structure inside the piston rod 2 needs to be disassembled and maintained, only need to remove the mounting head at the top, and then directly take out the components of the piston rod 2, the operation is more convenient, improving the practicability of the device.

[0032] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "connection" and "fixation" shall be understood in a broad sense. For example, "fixation" may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The content not described in detail in the specification belongs to the prior art well-known to those skilled in the art.

[0033] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A shock absorber with adjustable damping, comprising a cylinder body (1) and a piston rod (2), characterized in that: A flow hole (5) is formed on the surface of the piston rod (2). A flow-limiting column (6) and a positioning plate (14) are vertically and slidably arranged on the inner wall of the piston rod (2). An L-shaped flow groove (7) is formed on the surface of the flow-limiting column (6). A screw rod (8) is fixedly connected to the top end of the flow-limiting column (6). A sealing plug (9) is fixedly connected to the surface of the screw rod (8), and the sealing plug (9) is slidably arranged in the piston rod (2). A threaded inner pipe (15) is rotatably connected to the middle of the positioning plate (14), and the threaded inner pipe (15) is threadedly sleeved on the surface of the screw rod (8). A transmission mechanism for rotating the threaded inner pipe (15) and a limiting mechanism for restricting the displacement of the positioning plate (14) are arranged on the surface of the piston rod (2).

2. The damped adjustable shock absorber according to claim 1, wherein: A limiting groove (11) is formed at the top end of the piston rod (2). A limiting plate (16) is fixedly connected to the top end of the screw rod (8). The surfaces of the limiting plate (16) and the positioning plate (14) are both slidably arranged in the limiting groove (11), and the limiting plate (16) is located above the positioning plate (14).

3. A damping adjustable shock absorber according to claim 1, characterized in that: The transmission mechanism includes a rotating handle (3) and a second bevel gear (13). The rotating handle (3) is rotatably connected to the surface of the piston rod (2). The second bevel gear (13) is fixedly connected to the bottom end of the threaded inner pipe (15), and the screw rod (8) is not in contact with the second bevel gear (13). A first bevel gear (12) is fixedly connected to the end of the rotating handle (3) extending into the piston rod (2), and the first bevel gear (12) meshes with the second bevel gear (13).

4. A damping adjustable shock absorber according to claim 1, characterized in that: The limiting mechanism includes a plug rod (4). The plug rod (4) is arranged through the surface of the piston rod (2). The end of the plug rod (4) extending into the piston rod (2) is located on the upper surface of the positioning plate (14). Tension springs (10) are fixedly connected to both ends of the plug rod (4), and one end of each tension spring (10) is fixedly connected to the surface of the piston rod (2). The end of the plug rod (4) extending into the piston rod (2) is an inclined surface. The plug rod (4) is provided with two, and the two plug rods (4) are symmetrical to each other.

5. A damping adjustable shock absorber according to claim 1, characterized in that: The flow hole (5) is located above the piston at the bottom end of the piston rod (2). The flow-limiting column (6) is located at the bottom of the piston rod (2). The flow hole (5) and the L-shaped flow groove (7) are both provided with two, and the two flow holes (5) and the two L-shaped flow grooves (7) are symmetrical to each other.

6. A damping adjustable shock absorber according to claim 1, characterized in that: A sealing sleeve is arranged on the surface of the flow-limiting column (6), and the sealing sleeve is closely attached to the inner wall of the piston rod (2).

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