Nitrogen shock absorber of off-road vehicle

Abstract

The utility model discloses an off-road vehicle nitrogen shock absorber which comprises a damper and a spring, and the damper comprises a shell and a piston rod. The damper is sleeved with the spring, the lower end of the spring abuts against the shell, and the upper end of the spring abuts against a piston rod of the damper. The lower sealing cavity is connected with an oil storage cylinder through an oil conveying pipe, and an oil cylinder adjusting assembly is arranged on a connector at one end of the oil storage cylinder. The oil cylinder adjusting assembly comprises an adjusting knob and an oil cylinder adjusting valve needle arranged on the connector in a threaded fit mode, the upper end of the oil cylinder adjusting valve needle is connected to the adjusting knob, a conical head is arranged at the lower end of the oil cylinder adjusting valve needle, and the conical head and the oil conveying channel of the connector are oppositely arranged. By rotating the adjusting knob, when the conical head of the oil cylinder adjusting valve needle moves close to the oil conveying channel, the conical head slowly closes the oil conveying channel, so that the size of the oil conveying channel is reduced, the flowing speed of damping oil is reduced, and the damping effect of the damper is improved; the damping coefficient of the shock absorber is adjusted, and the adjusting operation is simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of shock absorber technology, and more specifically, to a nitrogen shock absorber for off-road vehicles. Background Technology

[0002] Shock absorbers are used to suppress the oscillation when the spring absorbs the shock and rebounds. They are widely used in automobiles to reduce the vibration of the frame and body, thereby improving the ride comfort of the car.

[0003] When a car travels over an uneven road surface, although the spring can absorb the vibration of the road surface, the spring itself will still have reciprocating motion. The shock absorber is used to suppress this spring jumping and improve the shock absorption effect.

[0004] Although existing shock absorbers have a damping effect, they generally do not have an adjustment function. Different car models generally require shock absorbers with different damping effects. In particular, shock absorbers used in racing cars require different damping effects on different tracks and roads. It is very troublesome to temporarily replace shock absorbers with different damping coefficients. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a nitrogen shock absorber for off-road vehicles.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A nitrogen shock absorber for off-road vehicles includes a damper and a spring. The damper includes a housing and a piston rod connected to a piston. The piston divides the sealed cavity of the damper into an upper sealed cavity and a lower sealed cavity, and the sealed cavity is filled with damping oil. The spring is sleeved on the damper, with its lower end abutting against the housing and its upper end abutting against the piston rod of the damper.

[0008] The lower sealing cavity is connected to an oil storage cylinder via an oil supply pipe, and an oil cylinder adjustment assembly is provided on the connector at one end of the oil storage cylinder.

[0009] The hydraulic cylinder adjustment assembly includes an adjustment knob and a hydraulic cylinder adjustment valve needle threaded onto the connector. The upper end of the hydraulic cylinder adjustment valve needle is connected to the adjustment knob, and the lower end is provided with a conical head. The conical head is positioned opposite to the oil supply channel of the connector.

[0010] Rotating the adjustment knob causes the conical head of the cylinder adjustment valve needle to move up and down relative to the oil delivery channel, thereby opening or closing the oil delivery channel.

[0011] The present invention further includes: an external thread on the outer shell, and a spring adjustment assembly on the outer shell, the spring adjustment assembly including a locking nut and a spring disc sleeved on the outer shell, the locking nut being threadedly engaged with the external thread;

[0012] The lower end of the spring rests against the spring disc. Rotating the locking nut causes the spring disc to move up and down in the outer casing, thereby adjusting the preload of the spring.

[0013] The present invention is further provided with: an oil passage valve assembly is provided at the front end of the piston rod, the oil passage valve assembly includes a valve core and a movable oil passage valve adjusting needle, and a tapered head is provided at the end of the oil passage valve adjusting needle facing the valve core;

[0014] One end of the valve core passes through the piston and is placed in the lower sealing cavity, while the other end is placed on the piston rod. The piston rod compresses the piston downward, causing the damping oil in the lower sealing cavity to pass through the valve core and through the oil passage hole on the piston rod into the upper sealing cavity.

[0015] When the regulating valve needle of the oil passage valve moves toward the valve core, the conical head of the regulating valve needle will block the valve core.

[0016] The present invention further includes: an oil valve adjustment assembly at the rear end of the piston rod, the oil valve adjustment assembly including an adjustment nut and an adjustment rod built into the piston rod, a compression cone at the front end of the adjustment nut, one end of the adjustment rod cooperating with the oil valve adjustment valve needle, and the other end passing through the piston rod and cooperating with the compression cone of the adjustment nut;

[0017] When the adjusting nut moves inward, the pressing cone presses the adjusting rod downward, and the adjusting rod drives the oil valve adjusting needle to move toward the valve core.

[0018] The present invention further includes a hexagonal bearing hole on the end of the adjusting nut.

[0019] The present invention is further provided that: the upper end of the piston rod is connected to the connecting arm, and the adjusting nut is threadedly connected to the connecting arm.

[0020] The beneficial effects of this utility model are as follows: The shock absorber includes a damper and a spring. The spring is sleeved on the damper, with its lower end abutting against the outer shell and its upper end abutting against the piston rod of the damper. The lower sealing cavity of the damper is connected to an oil reservoir via an oil supply pipe. A cylinder adjustment assembly is provided on the connector at one end of the oil reservoir. The cylinder adjustment assembly includes an adjustment knob and a cylinder adjustment valve needle threaded onto the connector. The upper end of the cylinder adjustment valve needle is connected to the adjustment knob, and the lower end is provided with a conical head. The conical head is positioned opposite to the oil supply channel of the connector. By rotating the adjustment knob, the cylinder... The conical head of the regulating valve needle moves up and down relative to the oil delivery channel. When the conical head of the regulating valve needle moves closer to the oil delivery channel, it slowly closes the channel to reduce its size. When the piston rod presses down on the piston, it reduces the flow velocity of the damping oil from the upper sealing chamber to the lower sealing chamber, thereby increasing the damping effect of the damper. When the regulating knob is rotated in the opposite direction, the conical head of the regulating valve needle moves away from the oil delivery channel, causing the channel to gradually enlarge, which increases the flow velocity of the damping oil and reduces the damping effect of the damper. Ultimately, this achieves the adjustment of the damping coefficient of the shock absorber, and the adjustment operation is simple and convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a nitrogen shock absorber for off-road vehicles according to the present invention;

[0022] Figure 2 This is a schematic diagram of the damper structure of a nitrogen shock absorber for off-road vehicles according to the present invention;

[0023] Figure 3 This is a diagram showing the fit between the cylinder adjustment assembly and the connector of a nitrogen shock absorber for off-road vehicles according to this utility model.

[0024] Figure 4 This is a schematic diagram of the piston rod of a nitrogen shock absorber for off-road vehicles according to the present invention;

[0025] Figure 5 This is a diagram showing the fit between the oil passage valve adjustment assembly and the oil passage valve assembly of a nitrogen shock absorber for off-road vehicles according to this utility model.

[0026] Figure 6 This is a schematic diagram of the oil passage valve assembly of a nitrogen shock absorber for off-road vehicles according to the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the adjusting nut of the nitrogen shock absorber for off-road vehicles according to this utility model;

[0028] Explanation of reference numerals in the attached drawings: 1. Damper; 11. Housing; 12. Piston; 13. Piston rod; 14. External thread; 2. Spring; 3. Oil reservoir; 31. Oil supply pipe; 32. Oil cylinder adjusting assembly; 321. Adjusting knob; 322. Oil cylinder adjusting valve needle; 33. Connector; 4. Spring adjusting assembly; 41. Locking nut; 42. Spring disc; 5. Oil passage valve assembly; 51. Valve core; 52. Oil passage valve adjusting needle; 6. Oil passage valve adjusting assembly; 61. Adjusting nut; 611. Extrusion cone; 612. Hexagonal bearing hole; 62. Adjusting rod; 7. Connecting arm. Detailed Implementation

[0029] See attached document Figures 1 to 7 This utility model provides a more detailed description of a nitrogen shock absorber for off-road vehicles.

[0030] A nitrogen shock absorber for off-road vehicles includes a damper 1 and a spring 2. The damper 1 includes a housing 11 and a piston rod 13 connected to a piston 12. The piston 12 divides the sealed cavity of the damper 1 into an upper sealed cavity and a lower sealed cavity, and the sealed cavity is filled with damping oil. The spring 2 is sleeved on the damper 1, with its lower end abutting against the housing 11 and its upper end abutting against the piston rod 13 of the damper 1.

[0031] The lower sealing cavity is connected to an oil storage cylinder 3 via an oil supply pipe 31, and an oil cylinder adjustment component 32 is provided on a connector 33 at one end of the oil storage cylinder 3.

[0032] The cylinder adjustment assembly 32 includes an adjustment knob 321 and a cylinder adjustment valve needle 322 threadedly disposed on the connector 33. The upper end of the cylinder adjustment valve needle 322 is connected to the adjustment knob 321, and the lower end is provided with a conical head. The conical head is disposed opposite to the oil supply channel of the connector 33.

[0033] By rotating the adjustment knob 321, the conical head of the cylinder adjustment valve needle 322 moves up and down relative to the oil delivery channel. When the conical head of the cylinder adjustment valve needle 322 moves closer to the oil delivery channel, it slowly closes the oil delivery channel to reduce its size. When the piston rod 13 presses down on the piston 12, it reduces the flow velocity of the damping oil from the upper sealing chamber to the lower sealing chamber, thereby increasing the damping effect of the damper 1. When the adjustment knob 321 is rotated in the opposite direction, the conical head of the cylinder adjustment valve needle 322 moves away from the oil delivery channel, causing the oil delivery channel to gradually enlarge, thereby increasing the flow velocity of the damping oil and reducing the damping effect of the damper 1. Ultimately, the damping coefficient of the shock absorber is adjusted, and the adjustment operation is simple and convenient.

[0034] The outer casing 11 is provided with an external thread 14, and a spring adjustment assembly 4 is provided on the outer casing 11. The spring adjustment assembly 4 includes a locking nut 41 and a spring disc 42 sleeved on the outer casing 11. The locking nut 41 is threadedly engaged with the external thread 14. The lower end of the spring 2 abuts against the spring disc 42. Rotating the locking nut 41 drives the spring disc 42 to move up and down in the outer casing 11 to adjust the preload of the spring 2. The preload of the shock absorber spring 2 can be flexibly adjusted according to actual needs to improve the applicability of the shock absorber product.

[0035] The piston rod 13 is provided with an oil passage valve assembly 5 at its front end, and the piston rod 13 is hollow. The oil passage valve assembly 5 includes a valve core 51 and a movable oil passage valve adjusting needle 52. The end of the oil passage valve adjusting needle 52 facing the valve core 51 is provided with a conical head. One end of the valve core 51 passes through the piston 12 and is placed in the lower sealing cavity, and the other end is placed on the piston rod 13. The piston rod 13 compresses the piston 12 downward, so that the damping oil in the lower sealing cavity passes through the valve core 51 and enters the upper sealing cavity through the oil passage hole on the piston rod 13. When the oil passage valve adjusting needle 52 moves toward the valve core 51, the conical head of the oil passage valve adjusting needle 52 will block the valve core 51.

[0036] The piston rod 13 is provided with an oil passage valve adjustment assembly 6 at its rear end. The oil passage valve adjustment assembly 6 includes an adjustment nut 61 and an adjustment rod 62 built into the piston rod 13. The adjustment nut 61 is provided with a hexagonal bearing hole 612 at its end. The adjustment nut 61 is provided with a compression cone 611 at its front end. One end of the adjustment rod 62 cooperates with the oil passage valve adjustment needle 52, and the other end passes through the piston rod 13 and cooperates with the compression cone 611 of the adjustment nut 61.

[0037] Rotating the adjusting nut 61 through the hexagonal socket 612 causes it to move inward. The pressing cone 611 presses down on the adjusting rod 62, which in turn drives the oil valve adjusting needle 52 toward the valve core 51. The conical head of the oil valve adjusting needle 52 blocks the opening of the valve core 51, making the opening smaller. This reduces the flow velocity of the damping oil between the upper and lower sealing chambers, increasing the damping effect of the damper 1. After rotating the adjusting nut 61 in the opposite direction, the pressing cone 611 moves backward. Under the pressure of the damping oil, the oil valve adjusting needle 52 pushes the adjusting rod 62 backward, increasing the opening of the valve core 51 and reducing the damping effect of the damper 1. This achieves the adjustment of the damping coefficient of the damper 1.

[0038] The upper end of the piston rod 13 is connected to the connecting arm 7, and the adjusting nut 61 is threaded onto the connecting arm 7. The connecting arm 7 is connected to the car. When the car vibrates up and down, the connecting arm 7 will drive the piston rod 13 to move, thereby compressing the spring 2. The damper 1 dampens the spring 2's movement.

[0039] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A nitrogen shock absorber for an off-road vehicle, comprising a damper and a spring, wherein the damper includes a housing and a piston rod connected to a piston; the piston divides the sealed cavity of the damper into an upper sealed cavity and a lower sealed cavity, the sealed cavity being filled with damping oil; characterized in that: The spring is sleeved on the damper, with its lower end abutting against the outer shell and its upper end abutting against the piston rod of the damper; The lower sealing cavity is connected to an oil storage cylinder via an oil supply pipe, and an oil cylinder adjustment assembly is provided on the connector at one end of the oil storage cylinder. The hydraulic cylinder adjustment assembly includes an adjustment knob and a hydraulic cylinder adjustment valve needle threaded onto the connector. The upper end of the hydraulic cylinder adjustment valve needle is connected to the adjustment knob, and the lower end is provided with a conical head. The conical head is positioned opposite to the oil supply channel of the connector. Rotating the adjustment knob causes the conical head of the cylinder adjustment valve needle to move up and down relative to the oil delivery channel, thereby opening or closing the oil delivery channel.

2. The nitrogen shock absorber for off-road vehicles according to claim 1, characterized in that: The outer shell is provided with an external thread, and the outer shell is provided with a spring adjustment assembly. The spring adjustment assembly includes a locking nut and a spring disc sleeved on the outer shell. The locking nut is threadedly engaged with the external thread. The lower end of the spring rests against the spring disc. Rotating the locking nut causes the spring disc to move up and down in the outer casing, thereby adjusting the preload of the spring.

3. A nitrogen shock absorber for off-road vehicles according to claim 1 or 2, characterized in that: The piston rod front end is provided with an oil passage valve assembly, the oil passage valve assembly includes a valve core and a movable oil passage valve adjusting valve needle, and the end of the oil passage valve adjusting valve needle facing the valve core is provided with a conical head; One end of the valve core passes through the piston and is placed in the lower sealing cavity, while the other end is placed on the piston rod. The piston rod compresses the piston downward, causing the damping oil in the lower sealing cavity to pass through the valve core and through the oil passage hole on the piston rod into the upper sealing cavity. When the regulating valve needle of the oil passage valve moves toward the valve core, the conical head of the regulating valve needle will block the valve core.

4. The nitrogen shock absorber for off-road vehicles according to claim 3, characterized in that: The piston rod is provided with an oil passage valve adjustment assembly at its rear end. The oil passage valve adjustment assembly includes an adjustment nut and an adjustment rod built into the piston rod. The adjustment nut is provided with a compression cone at its front end. One end of the adjustment rod cooperates with the oil passage valve adjustment valve needle, and the other end passes through the piston rod and cooperates with the compression cone of the adjustment nut. When the adjusting nut moves inward, the pressing cone presses the adjusting rod downward, and the adjusting rod drives the oil valve adjusting needle to move toward the valve core.

5. A nitrogen shock absorber for off-road vehicles according to claim 4, characterized in that: The adjusting nut has a hexagonal socket at its end.

6. A nitrogen shock absorber for off-road vehicles according to claim 5, characterized in that: The upper end of the piston rod is connected to the connecting arm, and the adjusting nut is threaded onto the connecting arm.

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