CN109764077B - Damping adjustable shock absorber - Google Patents

Abstract

The present invention belongs to the technical field of shock absorbing equipment, and specifically relates to a damping adjustable shock absorber, comprising a barrel, a sealed oil chamber is formed inside the barrel, a sealing seat is arranged in the oil chamber and is in close contact with the barrel to divide the oil chamber into a first chamber and a second chamber; a connecting rod assembly is closely penetrated in the sealing seat, the connecting rod assembly comprises a throttling sleeve and a throttling member, the connecting rod assembly is also provided with a liquid channel, the throttling sleeve is formed with a throttling channel, a throttling hole is provided on the connecting rod assembly, the throttling hole is located in the second chamber, the first chamber and the second chamber are connected through the throttling channel, the liquid channel and the throttling hole, a throttling head is arranged at one end of the throttling member close to the throttling sleeve, the throttling head is in a shape that gradually shrinks toward the throttling sleeve, the throttling member is arranged to move relative to the throttling sleeve, and the throttling head can extend into the throttling channel to close the throttling channel. The damping adjustable shock absorber provided by the present invention is widely used, and the damping force can be adjusted accordingly to realize the whole shock absorber to cope with different vibration situations.

Description

Adjustable damping shock absorber

Technical Field

The invention belongs to the technical field of shock absorbing equipment, and in particular relates to a damping adjustable shock absorber.

Background technique

Shock absorbers are equipped on various vehicles such as cars to reduce the impact of vibration caused by uneven road surface on the car and its passengers. Most vehicles currently use hydraulic shock absorbers. The working principle is that when the body and the axle vibrate and move relative to each other, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows from one cavity to another through the liquid channel. At this time, the friction between the cylinder wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, converting the vibration energy of the car into oil heat energy, which is then absorbed by the shock absorber and dissipated into the atmosphere. Obviously, the aperture size of the liquid channel determines the return speed of the hydraulic oil.

The technical problem existing in the prior art is that the aperture size of the liquid channel in the shock absorber is determined during manufacturing, that is, the return speed of the hydraulic oil is fixed. No matter how much pressure the shock absorber is subjected to or how much it is compressed, the reset speed of the elastic part on the shock absorber is fixed. However, the vibration force encountered by vehicles such as cars during actual driving is ever-changing, and the degree of compression of the shock absorber is also different. When the shock absorber is compressed to a small extent, the shock absorber should be reset at a faster speed to restore the smooth driving condition as soon as possible; when the shock absorber is compressed to a large extent, the shock absorber should be reset at a slower speed to avoid causing secondary vibration. Therefore, the aperture of the fixed liquid channel cannot meet the demand for adjustable damping in the above-mentioned shock absorber.

Summary of the invention

In view of the deficiencies in the above-mentioned prior art, the present invention provides a damping adjustable shock absorber, the purpose of which is to solve the technical problem that the damping force of the shock absorber is fixed and cannot meet the needs of coping with different road vibration conditions due to the non-adjustable aperture of the liquid channel in the prior art.

The present invention provides a damping adjustable shock absorber, and the specific technical solution is as follows:

The damping adjustable shock absorber comprises a barrel, wherein a sealed oil cavity is formed inside the barrel, and a sealing seat is arranged in the oil cavity and in close contact with the barrel to divide the oil cavity into a first cavity and a second cavity;

The sealing seat is tightly penetrated by a connecting rod assembly, the connecting rod assembly includes a throttling sleeve and a throttling member, and the connecting rod assembly is also provided with a liquid channel.

The throttling sleeve is formed with a throttling channel, the connecting rod assembly is provided with a throttling hole, the throttling hole is located in the second cavity, the first cavity and the second cavity are connected through the throttling channel, the liquid channel and the throttling hole,

The throttling head is arranged at one end of the throttling member close to the throttling sleeve. The throttling head is in a shape that gradually shrinks toward the throttling sleeve. The throttling member is movably arranged relative to the throttling sleeve. The throttling head can extend into the throttling channel to close the throttling channel.

In certain embodiments, the connecting rod assembly further comprises a piston rod, the piston rod is a hollow structure, and the throttling element is located in the piston rod.

In some embodiments, the cylinder body also includes a guide seat, which seals the cylinder body to form the oil chamber, the piston rod passes through the guide seat and is partially located outside the cylinder body, and a buffer spring is sleeved on the piston rod, and the buffer spring is located between the sealing seat and the guide seat.

In some embodiments, the throttling hole is opened on the piston rod, and the throttling hole is located in the second cavity.

In certain embodiments, the connecting rod assembly further comprises an adjusting rod and a return spring, wherein the adjusting rod is slidably disposed in the piston rod, and the return spring is sleeved on the throttling member and is located between the throttling sleeve and the adjusting rod.

In certain embodiments, it is characterized in that one end of the adjusting rod is connected to the throttling member, and a sealing ring is provided at the tail of the adjusting rod.

In some embodiments, the tail end of the adjusting rod is a first inclined surface structure.

The connecting rod assembly also includes an adjustment assembly, which includes an adjustment seat and an adjustment knob. The adjustment knob is sleeved on the adjustment seat, and the adjustment seat is threadedly engaged with the adjustment knob. The adjustment knob is connected to an adjustment block, and the bottom end of the adjustment block is a second inclined surface structure, and the first inclined surface structure is slidably engaged with the second inclined surface structure.

In some embodiments, the throttling member is located in the throttling sleeve, the throttling sleeve is provided with the throttling hole, and the throttling hole is located in the second cavity.

In certain embodiments, the connecting rod assembly includes an adjusting seat and an adjusting knob, the adjusting seat is connected to the throttling member, the adjusting knob is sleeved on the adjusting seat, and the adjusting knob is threadably matched with the adjusting seat.

In some embodiments, an airbag is further included, and the airbag contains high-pressure gas, and the airbag is disposed in the second cavity.

The present invention has the following beneficial effects: the damping adjustable shock absorber provided by the present invention is widely used, and adopts a setting in which the throttling head on the throttling piece is gradually tapered toward the throttling sleeve, so as to adjust the size of the channel aperture for the reciprocating flow of oil, thereby adjusting the damping force of the oil flow, so as to enable the entire shock absorber to cope with different vibration situations.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a damping adjustable shock absorber according to the present invention;

FIG2 is an enlarged schematic diagram of point A in FIG1 ;

3 is a schematic structural diagram of an adjustment assembly of an upper connecting rod structure in an embodiment of the present invention;

FIG. 4 is a schematic diagram of a lower connecting rod structure in an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to Figures 1-4.

The damping adjustable shock absorber comprises a barrel 1, wherein a sealed oil chamber 2 is formed inside the barrel 1, and a sealing seat 3 is arranged in the oil chamber 2 and in close contact with the barrel 1 to divide the oil chamber 2 into a first chamber 21 and a second chamber 22. In this way, the oil flows back and forth in the first chamber 21 and the second chamber 22. A connecting rod assembly 4 is tightly penetrated in the sealing seat 3, and the connecting rod assembly 4 comprises a throttling sleeve 41 and a throttling member 42. The connecting rod assembly 4 is also provided with a liquid channel 43, and the throttling sleeve 41 is formed with a throttling channel 411. A throttling hole 44 is provided on the connecting rod assembly 4, and the throttling hole 44 is located in the second chamber 22. The first chamber 21 and the second chamber 22 are connected through the throttling channel 411, the liquid channel 43 and the throttling hole 44. In this way, the oil can flow back and forth in the first chamber 21 and the second chamber 22 through the throttling channel 411, the liquid channel 43 and the throttling hole 44. A throttle head 421 is provided at one end of the throttle member 42 close to the throttle sleeve 41. The throttle head 421 is in a shape that tapers toward the throttle sleeve 41. The throttle member 42 is arranged to move relative to the throttle sleeve 41. The throttle head 421 can extend into the throttle channel 411 to close the throttle channel 411. In this way, since the throttle head 421 is in a shape that tapers toward the throttle sleeve 41, as the throttle member 42 moves, the gap between the throttle head 421 and the throttle sleeve 41 for liquid circulation will change accordingly. In addition, the closed seat can also be provided with a through hole, and can also serve as a channel for oil to reciprocate between the first cavity 21 and the second cavity 22.

The damping adjustable shock absorber in this embodiment is a U-shaped structure, and is provided with two connecting rod structures, including an upper connecting rod structure and a lower connecting rod structure.

The upper connecting rod structure in this embodiment is as follows:

The connecting rod assembly 4 also includes a piston rod 45, which is a hollow structure, and a throttle 42 is located in the piston rod 45. The piston rod 45 is a hollow structure in which the throttle 42 can be placed, and the throttle sleeve 41 can also be partially embedded in the hollow structure of the piston rod 45. In addition, the barrel 1 also includes a guide seat 5, which seals the barrel 1 to form an oil chamber 2. The piston rod 45 passes through the guide seat 5 and is partially located outside the barrel 1. A buffer spring 46 is sleeved on the piston rod 45, and the buffer spring 46 is located between the sealing seat 3 and the guide seat 5. The guide seat 5 is set to seal the oil chamber 2, and stabilize and guide the piston rod 45 to slide, so that the piston rod 45 drives the sealing seat to slide in the barrel 1. At the same time, a throttle hole 44 is opened on the piston rod 45, and the throttle hole 44 is located in the second cavity 22. In this way, the oil flows into the throttle sleeve 41 at the end of the piston rod 45 , the liquid channel 43 in the piston rod 45 and the throttle hole 44 on the piston rod 45 , and flows back and forth between the first cavity 21 and the second cavity 22 .

The connecting rod assembly 4 also includes an adjusting rod 451 and a return spring 452. The adjusting rod 451 is slidably arranged in the piston rod 45. The return spring 452 is sleeved on the throttle 42 and is located between the throttle sleeve 41 and the adjusting rod 451. In this way, the return spring 452 ensures that the adjusting rod 451 can be restored to its original position in the piston rod 45. In addition, it is characterized in that one end of the adjusting rod 451 is connected to the throttle 42, and a sealing ring 453 is arranged at the tail of the adjusting rod 451. In this way, it is ensured that the oil in the oil chamber 2 will not flow out of the piston rod 45.

Meanwhile, the tail end of the adjusting rod 451 is a first inclined surface structure 454. The connecting rod assembly 4 also includes an adjusting assembly, which includes an adjusting seat 472 and an adjusting knob 471. The adjusting knob 471 is sleeved on the adjusting seat 472. The adjusting seat 472 and the adjusting knob 471 are threadedly matched. The adjusting knob 471 is connected to an adjusting block 473. The bottom end of the adjusting block 473 is a second inclined surface structure 474. The first inclined surface structure 454 and the second inclined surface structure 474 are slidably matched. The adjusting knob 471 is rotated to drive the adjusting seat 472. Through the sliding match between the first inclined surface structure 454 and the second inclined surface structure 474, the adjusting rod 451 drives the throttling member 42 to move relative to the throttling sleeve 41.

In this embodiment, the specific structure of the lower connecting rod assembly 4 is as follows:

The throttle member 42 is located in the throttle sleeve 41, and the throttle sleeve 41 has a throttle hole 44, which is located in the second cavity 22. The oil flows back and forth between the first cavity 21 and the second cavity 22 through the throttle sleeve 41, the liquid channel 43 inside the throttle sleeve 41, and the throttle hole 44 on the throttle sleeve 41.

The connecting rod assembly 4 includes an adjusting seat 472 and an adjusting knob 471. The adjusting seat 472 is connected to the throttling member 42. The adjusting knob 471 is sleeved on the adjusting seat 472, and the adjusting knob 471 is threadedly matched with the adjusting seat 472. The adjusting knob 471 is rotated to drive the adjusting seat 472, and the adjusting seat 472 drives the throttling member 42 to move relative to the throttling sleeve 41.

The damping adjustable shock absorber in this embodiment further includes an airbag 6, and there is high pressure gas in the airbag 6, and the airbag 6 is arranged in the second cavity 22. The airbag 6 is connected to the inner wall of the barrel 1 through a fixing seat, and the valve seals the airbag 6. The airbag 6 can undergo elastic deformation to compensate for the damping size of the oil in the second cavity 22.

In summary, the damping adjustable shock absorber provided in this embodiment generally works as follows:

The adjusting knob 471 is rotated to make the adjusting seat 472 move up and down through the thread, and the adjusting seat 472 drives the adjusting block 473, and the second inclined surface structure 474 on the adjusting block 473 is slidably matched with the first inclined surface structure 454 on the adjusting rod 451, so that the adjusting rod 451 drives the throttling member 42 to move relative to the throttling sleeve 41. Since the throttling member 42 is provided with a throttling head 421 which is gradually reduced in the direction of the throttling sleeve 41, the gap between the throttling head 421 and the throttling sleeve 41 is changed to change the gap for liquid circulation, thereby changing the speed of the reciprocating flow of the oil in the first cavity 21 and the second cavity 22, so as to adjust the damping force of the shock absorber.

The adjusting knob 471 is rotated to make the adjusting seat 472 move up and down through the thread, and the adjusting seat 472 drives the throttling member 42 to move relative to the throttling sleeve 41. Since the throttling member 42 is provided with a throttling head 421 which is gradually tapered toward the throttling sleeve 41, the gap between the throttling head 421 and the throttling sleeve 41 for liquid circulation is changed, thereby changing the flow speed of the oil reciprocating in the first cavity 21 and the second cavity 22, and adjusting the damping force of the shock absorber.

The damping adjustable shock absorber provided by the present invention is widely used. The throttle head 421 on the throttle member 42 is set to be gradually tapered toward the throttle sleeve 41, and the size of the aperture of the liquid channel 43 is adjusted, thereby adjusting the damping force of the oil flow, so that the entire shock absorber can cope with different vibration situations.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims (3)

1. The damping adjustable shock absorber is characterized by comprising a cylinder body (1), wherein a sealed oil cavity (2) is formed in the cylinder body (1), and a sealing seat (3) is arranged in the oil cavity (2) and is tightly contacted with the cylinder body (1) to divide the oil cavity (2) into a first cavity (21) and a second cavity (22);

a connecting rod assembly (4) is tightly penetrated in the sealing seat (3), the connecting rod assembly (4) comprises a throttling sleeve (41) and a throttling piece (42), and the connecting rod assembly (4) is also provided with a liquid channel (43);

the throttle sleeve (41) is provided with a throttle channel (411), the connecting rod assembly (4) is provided with a throttle hole (44), the throttle hole (44) is positioned in the second cavity (22), and the first cavity (21) and the second cavity (22) are communicated with each other through the throttle channel (411), the liquid channel (43) and the throttle hole (44);

a throttle head (421) is arranged at one end of the throttle piece (42) close to the throttle sleeve (41), the throttle head (421) is in a shape gradually reducing towards the throttle sleeve (41), the throttle piece (42) is arranged in a moving way relative to the throttle sleeve (41), and the throttle head (421) can extend into the throttle channel (411) to seal the throttle channel (411);

the connecting rod assembly (4) further comprises a piston rod (45), the piston rod (45) is of a hollow structure, and the throttling element (42) is positioned in the piston rod (45);

the connecting rod assembly (4) further comprises an adjusting rod (451) and a return spring (452), the adjusting rod (451) is slidably arranged in the piston rod (45), and the return spring (452) is sleeved on the throttling element (42) and is positioned between the throttling sleeve (41) and the adjusting rod (451);

the tail end of the adjusting rod (451) is of a first inclined surface structure (454), the connecting rod assembly (4) further comprises an adjusting assembly (47), the adjusting assembly (47) comprises an adjusting seat (472) and an adjusting knob (471), the adjusting knob (471) is sleeved on the adjusting seat (472), the adjusting seat (472) is in threaded fit with the adjusting knob (471), the adjusting knob (471) is connected with an adjusting block (473), the bottom end of the adjusting block (473) is of a second inclined surface structure (474), and the first inclined surface structure (454) is in sliding fit with the second inclined surface structure (474);

the piston rod (45) is provided with the throttle hole (44), and the throttle hole (44) is positioned in the second cavity (22);

one end of the adjusting rod (451) is connected with the throttling piece (42), and a sealing ring (453) is arranged at the tail of the adjusting rod (451).

2. Damping adjustable shock absorber according to claim 1, wherein the barrel (1) further comprises a guide seat (5), the guide seat (5) seals the barrel (1) to form the oil cavity (2), the piston rod (45) penetrates through the guide seat (5) and is partially positioned outside the barrel (1), a buffer spring (46) is sleeved on the piston rod (45), and the buffer spring (46) is positioned between the seal seat (3) and the guide seat (5).

3. The damping adjustable shock absorber according to claim 1, further comprising an air bag (6), and wherein the air bag (6) has a high pressure gas therein, the air bag (6) being disposed in the second cavity (22).