CN216158173U

CN216158173U - Damping-adjustable shock absorber

Info

Publication number: CN216158173U
Application number: CN202121003747.4U
Authority: CN
Inventors: 周海东
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-05-10
Filing date: 2021-05-10
Publication date: 2022-04-01
Anticipated expiration: 2031-05-10

Abstract

The utility model discloses a damper capable of adjusting damping, which comprises an outer cylinder filled with damper oil and low-pressure nitrogen, an inner cylinder arranged in the outer cylinder, a bottom valve assembly arranged between the outer cylinder and the inner cylinder, a piston rod arranged in the inner cylinder, a piston assembly linked with the piston rod, a middle cylinder and a damping adjusting valve, wherein two ends of the middle cylinder are connected to the outer wall of the inner cylinder, a flow oil hole C is formed in the left half part of the inner cylinder and communicated with the middle cylinder, the damping adjusting valve is fixed on the outer cylinder and comprises a fixed sleeve, an oil through valve, a rotary valve core, a locking part with a hole in the center, a large handle, a spring and balls, the arrangement of the middle cylinder prolongs the running route of the damper oil generated damping, so that the damping is softer and better in damping performance, the arrangement and application of the damping adjusting valve can enable a vehicle to be matched with actual road conditions, and improve riding comfort and control stability, the utility model has simple structure, convenient and flexible operation and reliable work.

Description

Damping-adjustable shock absorber

Technical Field

The utility model relates to an automobile shock absorber, in particular to a shock absorber with adjustable damping.

Background

In order to improve the smoothness and the comfort of the running of an automobile, shock absorbers are arranged on an automobile suspension system, the shock absorbers used by a common car basically belong to hydraulic shock absorbers, shock absorber oil is injected into a cylinder body of the shock absorber, a piston assembly is arranged on a piston rod, a bottom valve assembly which generates damping through pivot in the process of shortening stroke is arranged at the bottom of an inner cylinder and an outer cylinder, the principle is that when the suspension and an axle do reciprocating relative motion, when a shock absorber piston generates pressure in the process of reciprocating motion, an elastic valve plate of the bottom valve assembly is deflected by oil pressure to form a set gap, oil in the inner cylinder of the shock absorber repeatedly flows into another cavity from one cavity through the gap formed by the compression of the elastic valve plate of the bottom valve assembly, at the moment, the friction between a hole wall and the oil and the friction in liquid molecules form damping force, so that the vibration energy of the car body and the car frame is converted into heat energy to be absorbed by the oil, and is diffused to the atmosphere through the outer cylinder of the shock absorber, thereby keeping the vehicle running stably and ensuring the riding comfort. Because the piston rod can occupy the volume of a part of the inner cylinder when extending into the cylinder, the cylinder of the traditional shock absorber cannot be completely filled with shock absorber oil, and when the piston rod extends out completely, negative pressure cannot be formed in the cylinder, so that a part of space needs to be reserved between the outer cylinder and the inner cylinder of the traditional shock absorber to offset the volume change of the whole cylinder caused by the reciprocating motion of the piston rod, in order to achieve better damping effect and avoid the negative pressure which can be caused when the piston rod extends out, most shock absorber products are filled with low-pressure nitrogen gas of 0.4-0.8MPa at present, therefore, the damping performance is improved and adapted to different vehicles and road conditions, and the piston rod is still an important index for evaluating the performance of the shock absorber. Because the damping of present ordinary bumper shock absorber is fixed, hardly adapt to different vehicles and complicated road conditions, in order to satisfy whole car travelling comfort and control the higher requirement of stability, need one kind and can adjust damped bumper shock absorber according to actual road conditions.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defect that the damping of the conventional shock absorber cannot be adjusted according to actual conditions, further improve riding comfort and control stability, and provide the shock absorber which can adjust the adjustable damping matched with the shock absorber according to actual road conditions.

In order to achieve the purpose, the utility model adopts the technical scheme that the damping-adjustable shock absorber comprises an outer cylinder filled with shock absorber oil and low-pressure nitrogen, an inner cylinder arranged in the outer cylinder, a bottom valve assembly arranged between the outer cylinder and the inner cylinder, a piston rod arranged in the inner cylinder, a piston assembly linked with the piston rod, a middle cylinder and a damping adjusting valve, wherein two ends of the middle cylinder are connected to the outer wall of the inner cylinder, the left half part of the inner cylinder is provided with an oil flow hole C communicated with the middle cylinder, the damping adjusting valve is fixed on the outer cylinder and comprises a fixed sleeve, an oil through valve, a rotary valve core, a locking piece with a hole at the center, a large handle, a spring and balls, the fixed sleeve is welded at the right half part of the outer cylinder, the oil through valve is arranged in the fixed sleeve, the lower part of the oil through valve enters the outer cylinder and is connected with the right part of the middle cylinder, and the inner wall of the upper part of the oil through valve is provided with a plurality of positioning grooves, one side of the lower part of the oil through valve is provided with an oil flow hole A, a gap A is arranged between the part of the oil through valve positioned in the outer cylinder and the wall of the outer cylinder to be used as an oil flow channel, the lower part of the oil through valve is also provided with a central oil hole A, a gap B is formed between the lower end face of the rotary valve core and the inner wall of the inner cylinder and serves as an oil flowing channel, a rotary valve core is arranged in the oil flowing valve, a locking part is screwed into the upper end of a fixed sleeve to tightly press the oil flowing valve, the top of the rotary valve core is exposed out of a hole in the center of the locking part and is connected with a large handle through a screw, a central oil hole B is formed in the lower portion of the rotary valve core and corresponds to a central oil hole A in the lower portion of the oil flowing valve, a plurality of oil flowing holes B with different diameters and a blind hole set as a first gear are evenly distributed in the lower portion of the rotary valve core by taking the central oil hole B as an axis, the plurality of oil flowing holes B are communicated with the central oil hole B, a spring and a ball for positioning are arranged in one side of the upper portion of the rotary valve core, and positioning ends of the spring and the ball are matched with positioning grooves in the oil flowing valve.

The left half part of the outer cylinder is filled with low-pressure nitrogen, and the right half part of the outer cylinder is filled with damping oil.

The number of the oil flow holes B is equal to the number of the positioning grooves on the oil through valve, and the angles of the oil flow holes B are the same.

The oil flow holes B with different diameters are uniformly distributed from small to large according to the diameter size.

And each oil flow hole B at the lower part of the rotary valve core corresponds to the oil flow hole A at the lower part of the oil through valve at the respective positioning point.

The rotary valve core can freely rotate in the oil through valve.

The left space of the piston assembly is a cavity A, and the right space of the piston assembly is a cavity B; the top space of the bottom valve component and the inner part of the outer barrel are provided with a cavity C; the middle cylinder is provided with a cavity D.

The piston assembly includes a reset valve and a flow-through valve.

The bottom valve assembly comprises a compression valve, a compensation valve and an elastic valve plate.

When the piston assembly reciprocates in the inner cylinder filled with the shock absorber oil during the running of the automobile, oil continuously flows among the outer cylinder, the inner cylinder, the middle cylinder and the damping regulating valve, when the piston rod moves (is compressed) rightwards, part of the shock absorber oil in the cavity B flows to the cavity A through the piston assembly after being pressed, and simultaneously flows to the cavity C through the bottom valve assembly, part of the oil in the cavity C flows to the cavity D through the gap A, the damping regulating valve and the gap B, and flows to the cavity A through the oil flow hole C, and the shock absorber oil generates damping in the running process; when the piston rod moves (stretches) leftwards, part of oil in the cavity A flows to the cavity B through the piston assembly after being pressed, part of absorber oil in the cavity C also flows to the cavity B through the bottom valve assembly after being pressed by negative pressure, meanwhile, part of the absorber oil in the cavity A flows to the cavity D through the oil flow hole C, flows to the cavity C through the gap B, the damping adjusting valve and the gap A, and the damper oil generates damping in the running process. Because the setting of well section of thick bamboo has prolonged the operation route that produces above-mentioned two kinds of damps, makes the damping gentler, and damping performance is better, can further improve the travelling comfort and the stability of controlling of riding.

In order to match the driving with the actual road condition and improve the riding comfort and the control stability, the damping can be adjusted through the damping adjusting valve, the large handle is rotated to change the section size of the oil flow hole B on the side surface of the rotary valve core, and the damping size is changed by changing the flow of the shock absorber oil, so that the aim of adjusting different damping is fulfilled.

The utility model has the advantages of simple structure, convenient and flexible operation and control, reliable work and capability of improving the riding comfort.

Drawings

FIG. 1 is a general schematic view of the present invention with the arrows showing the direction of movement of the piston rod as it is compressed (right-hand movement);

FIG. 2 is a schematic view of the damper regulator valve of FIG. 1 with arrows indicating the direction of flow of the damper oil as the piston rod is compressed (moved to the right);

fig. 3 is a schematic sectional view a-a of fig. 2.

In the figure: the damper comprises an outer cylinder 1, an inner cylinder 2, a bottom valve assembly 3, a piston rod 4, a piston assembly 5, a middle cylinder 6, a damping adjusting valve 7, a fixed sleeve 701, an oil through valve 702, a rotary valve core 703, a locking member 704, a large handle 705, a spring 706, a ball 707, a positioning groove 708, an oil flow hole A709, a gap A710, a central oil hole A711, a gap B712, a central oil hole B713, an oil flow hole B714, a blind hole 715, an oil flow hole C8, damper oil 9, low-pressure nitrogen 10, a cavity 11, a cavity 12, a cavity 13 and a cavity 14D, wherein the piston rod is connected with the piston assembly 5 through the oil through hole A711 and the central oil hole B712 through the positioning groove 708 respectively

Detailed Description

The utility model will be further described by way of example with reference to the accompanying drawings.

The damper with adjustable damping as shown in fig. 1 comprises an outer cylinder 1 filled with damper oil 9 and low-pressure nitrogen 10, an inner cylinder 2 arranged in the outer cylinder 1, a bottom valve assembly 3 arranged between the outer cylinder 1 and the inner cylinder 2, a piston rod 4 arranged in the inner cylinder 2, a piston assembly 5 linked with the piston rod 4, a middle cylinder 6 and a damping adjusting valve 7, wherein two ends of the middle cylinder 6 are connected to the outer wall of the inner cylinder 2, a flow oil hole C8 is formed in the left half part of the inner cylinder 2 and communicated with the middle cylinder 6, and the damping adjusting valve 7 is fixed on the outer cylinder 1;

as shown in fig. 2 and 3, the damper regulator valve 7 includes a fixing sleeve 701, an oil passing valve 702, a rotary valve core 703, a locking member 704 with a hole at the center, a large handle 705, a spring 706, and a ball 707, the fixing sleeve 701 is welded at the right half of the outer cylinder 1, the oil passing valve 702 is disposed in the fixing sleeve 701, the lower portion of the oil passing valve 702 enters the outer cylinder 1 and is connected with the right portion of the middle cylinder 6, the inner wall of the upper portion of the oil passing valve 702 is provided with a plurality of positioning grooves 708, one side of the lower portion of the oil passing valve 702 is designed with an oil passing hole a709, a gap a710 is formed between the portion of the oil passing valve 702 located in the outer cylinder 1 and the outer cylinder wall as an oil passing channel, the lower portion of the oil passing valve 702 is further provided with a central oil hole a711, a gap B712 is formed between the lower end surface of the oil passing valve and the inner wall of the inner cylinder 2 as an oil passing channel, the rotary valve core 703 is disposed in the oil passing valve 702, the locking member 704 is screwed into the upper end of the fixing sleeve 701 to tightly press the oil passing valve 702, the top of the rotary valve core 703 is exposed from the hole of the locking member 704 and is connected with the large handle 705 by a screw, the lower part of the rotary valve core 703 is provided with a central oil hole B713, the central oil hole B713 corresponds to a central oil hole A711 at the lower part of the oil through valve 702, the lower part of the rotary valve core 703 is uniformly provided with a plurality of oil flow holes B714 with different diameters and a blind hole 715 set as a first gear by taking the central oil hole B713 as an axis, the plurality of oil flow holes B714 are communicated with the central oil hole B713, one side of the upper part of the rotary valve core 703 is internally provided with a spring 706 and a ball 707 for positioning, and positioning ends of the spring 706 and the ball 707 are matched with a positioning groove 708 on the oil through valve 702.

As shown in fig. 1, the left space of the piston assembly 5 is a cavity a 11, and the right space of the piston assembly 5 is a cavity B12; the top space of the bottom valve component 3 and the inner part of the outer cylinder 2 are provided with a C cavity 13; the middle cylinder 6 is internally provided with a D cavity 14.

In embodiment 1, as shown in fig. 1 and 2, when the piston rod 4 moves (compresses) rightward, part of the absorber oil 9 in the B chamber 12 is compressed to deform the elastic valve sheet in the piston assembly 5 and open the oil drainage channel, the absorber oil 9 flows to the a chamber 11 through the piston assembly 5, at the same time, another part of the oil in the B chamber 12 is compressed to deform the elastic valve sheet in the base valve assembly 3 and open the oil drainage channel, the absorber oil 9 flows to the C chamber 13 through the base valve assembly 3, and at the same time, part of the oil in the C chamber 13 flows to the D chamber 14 through the gap a710 and the oil flow hole a709, the oil flow hole B714, the center oil hole B713, the center oil hole a711 and the gap B712 sequentially, the absorber oil 9 in the D chamber 14 flows to the a chamber 11 through the oil flow hole C8, and the operation process of the absorber oil 9 generates damping.

In embodiment 2, as shown in fig. 1 and 2, when the piston rod 4 moves (stretches) leftward, a part of the oil in the chamber a 11 is pressurized to deform the elastic valve sheet in the piston assembly 5 and open the oil drainage channel, the damper oil 9 in the chamber a 11 flows through the piston assembly 5 to the chamber B12, a part of the damper oil 9 in the chamber C13 is subjected to negative pressure and deforms the elastic valve sheet in the bottom valve assembly 3 to open the oil drainage channel, the damper oil 9 flows through the bottom valve assembly 3 to the chamber B12, a part of the damper oil 9 in the chamber a 11 flows through the oil flow hole C8 to the chamber D14, and then flows through the gap B712, the central oil hole a711, the central oil hole B713, the oil flow hole B714, the oil flow hole a709, and the gap a710 to the chamber C13, and the operation process of the damper oil 9 also generates damping.

In embodiment 3, as shown in fig. 2 and 3, the damping adjusting valve 7 is used for adjusting the damping, the large handle 705 is rotated to rotate the rotary valve core 703, and when the rotary valve core is rotated by different angles, the size of the cross section of the oil flow hole B714 on the side surface of the rotary valve core 703 is changed, that is, the flow rate of the damper oil 9 is changed, that is, the damping is changed, so that the purpose of adjusting different damping is achieved.

The above embodiments are merely preferred embodiments given for the purpose of illustration and not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The damper capable of adjusting damping comprises an outer cylinder (1) filled with damper oil (9) and low-pressure nitrogen (10), an inner cylinder (2) arranged in the outer cylinder (1), a bottom valve component (3) arranged between the outer cylinder (1) and the inner cylinder (2), a piston rod (4) arranged in the inner cylinder (2) and a piston component (5) linked with the piston rod (4), and is characterized by further comprising a middle cylinder (6) and a damping adjusting valve (7), wherein two ends of the middle cylinder (6) are connected to the outer wall of the inner cylinder (2), an oil flow hole C (8) is formed in the left half part of the inner cylinder (2) and communicated with the middle cylinder (6), and the damping adjusting valve (7) is fixed on the outer cylinder (1);

the damping adjusting valve (7) comprises a fixed sleeve (701), an oil through valve (702), a rotary valve core (703), a locking member (704) with a hole in the center, a large handle (705), a spring (706) and a ball (707), wherein the fixed sleeve (701) is welded on the right half part of the outer cylinder (1), the fixed sleeve (701) is internally provided with the oil through valve (702), the lower part of the oil through valve (702) enters the outer cylinder (1) and is connected with the right part of the middle cylinder (6), the inner wall of the upper part of the oil through valve (702) is provided with a plurality of positioning grooves (708), one side of the lower part of the oil through valve (702) is provided with an oil flow hole A (709), a gap A (710) is arranged between the part of the oil through valve (702) in the outer cylinder (1) and the outer cylinder wall to serve as an oil flow channel, the lower part of the oil through valve (702) is also provided with a center oil hole A (711), and a gap B (712) is arranged between the lower end surface of the inner wall of the inner cylinder (2) to serve as an oil flow channel, a rotary valve core (703) is arranged in the oil passing valve (702), a locking piece (704) is screwed into the upper end of a fixed sleeve (701) to tightly press the oil passing valve (702), the top of the rotary valve core (703) is exposed out of a hole in the center of the locking piece (704) and is connected with a large handle (705) through a screw, a central oil hole B (713) is formed in the lower portion of the rotary valve core (703), the central oil hole B (713) corresponds to a central oil hole A (711) in the lower portion of the oil passing valve (702), a plurality of oil flow holes B (714) with different diameters and a blind hole (715) set as a first gear are uniformly distributed in the lower portion of the rotary valve core (703) by taking the central oil hole B (713) as an axis, the plurality of oil flow holes B (714) are communicated with the central oil hole B (713), a spring (706) and a ball (707) for positioning are arranged in one side of the upper portion of the rotary valve core (703), and positioning ends of the spring (706) and the ball (707) are matched with a positioning groove (708) in the oil passing valve (702).

2. The shock absorber of claim 1, wherein the number of the oil flow holes B (714) is equal to the number of the positioning grooves (708) of the oil passing valve (702) and the angle is the same.

3. The shock absorber of claim 1 or 2, wherein the oil flow holes B (714) of different diameters are uniformly distributed in the order of the size of the diameter from small to large.

4. The adjustable damping shock absorber according to claim 1 or claim 3, wherein each oil flow hole B (714) at the lower portion of the rotary valve spool (703) corresponds to the oil flow hole A (709) at the lower portion of the oil through valve (702) at the respective set point.

5. An adjustable damping shock absorber according to claim 1 wherein the rotary spool (703) is free to rotate within the vent valve (702).