CN108999912B

CN108999912B - Vibration damper

Info

Publication number: CN108999912B
Application number: CN201810910191.3A
Authority: CN
Inventors: 姜太云
Original assignee: Shanghai Manjie Auto Precision Parts Co ltd
Current assignee: Shanghai Manjie Auto Precision Parts Co ltd
Priority date: 2018-08-10
Filing date: 2018-08-10
Publication date: 2020-10-20
Anticipated expiration: 2038-08-10
Also published as: CN108999912A

Abstract

The invention discloses a vibration damper, which relates to the field of vibration damping of locomotives and adopts the technical scheme that the vibration damper comprises a piston rod, a first hydraulic cylinder, a connecting seat, an adjusting assembly and a cylinder; one end of the first hydraulic cylinder, which is close to the connecting seat, is in threaded connection with a buffer sleeve; the first hydraulic cylinder is filled with oil with a buffering function; the side wall of the buffer sleeve is provided with a through hole which is communicated with the connecting seat; the hydraulic buffer component is also included; the connecting seat is provided with an adjusting hole. The piston rod moves towards the direction close to the connecting seat, when the buffer piston moves into the buffer sleeve, oil in the buffer sleeve cannot pass through the through hole formed in the side wall of the buffer sleeve, at the moment, the oil passes through the adjusting hole, so that the oil remained in the first hydraulic cylinder is discharged completely, and the damping when the piston rod moves into the buffer sleeve is adjusted through the hydraulic buffer assembly. The situation that the buffering piston cannot move to the bottom end of the buffering sleeve due to residual oil in the first hydraulic cylinder is avoided, and waste of the space of the first hydraulic cylinder is avoided.

Description

Vibration damper

Technical Field

The invention relates to the field of vibration reduction of locomotives, in particular to a vibration absorber.

Background

In order to alleviate and attenuate the impact and vibration of the vehicle caused by the unevenness of the road in the driving process, ensure the smoothness and comfort of the driving, prolong the service life of the vehicle and improve the stability of the operation, the vehicle is provided with vibration absorbers.

Among the prior art, chinese utility model patent that the grant bulletin number is CN206770493U discloses a novel locomotive keeps away ware and includes a hydraulic pressure section of thick bamboo, the one end of a hydraulic pressure section of thick bamboo is provided with the connecting seat, the other end of a hydraulic pressure section of thick bamboo inwards wears to be equipped with the hydraulic stem, one side that the hydraulic stem is located a hydraulic pressure section of thick bamboo is provided with first piston, be provided with first spring between hydraulic stem and the hydraulic pressure section of thick bamboo, the surface cover is equipped with the sleeve on the hydraulic pressure section of thick bamboo circumference, the inboard that lies in first piston on the hydraulic stem is provided with the second piston, be provided with the second spring between first piston and the second piston, be provided with a gasbag section of thick bamboo on the connecting seat, be provided with the circulation way between hydraulic pressure room and the hydraulic.

However, in the working process of the novel locomotive vibration absorber, when the piston moves to the bottom end of the accommodating chamber, the piston can block a channel between the accommodating chamber and the air bag, so that part of oil is remained in the hydraulic cylinder, and the piston cannot move to the bottom end of the hydraulic cylinder, so that the movement range of the piston is influenced.

Disclosure of Invention

In view of the shortcomings of the prior art, the invention aims to provide a shock absorber which can enable a piston to move to the bottom end of a hydraulic cylinder.

In order to achieve the purpose, the invention provides the following technical scheme: a vibration damper comprises a piston rod, a first hydraulic cylinder connected with the piston rod in a sliding manner, a connecting seat fixed at one end of the hydraulic cylinder far away from the piston rod, an adjusting component fixed inside the connecting seat and a cylinder fixedly connected with the connecting seat; a piston is fixed at the part of the piston rod extending into the first hydraulic cylinder, and a buffer piston is fixed at one end of the piston rod close to the connecting seat; one end of the first hydraulic cylinder, which is close to the connecting seat, is in threaded connection with a buffer sleeve; the piston is connected with the inner wall of the first hydraulic cylinder in a sliding manner; the radius of the buffer piston is the same as that of the inner wall of the buffer sleeve, and the buffer piston can slide in the inner wall of the buffer sleeve; the first hydraulic cylinder is filled with oil with a buffering function; the side wall of the buffer sleeve is provided with a through hole which is communicated with the connecting seat; the first hydraulic cylinder and the cylinder are both fixed on the same side of the connecting seat and are communicated through an oil duct arranged in the connecting seat; one end of the cylinder barrel, which is far away from the connecting seat, is sealed; the hydraulic buffer component is arranged on the connecting seat; the connecting seat is also provided with an adjusting hole matched with the hydraulic buffer component.

Through adopting above-mentioned technical scheme, the piston rod is to the direction motion that is close to the connecting seat, and when the inside of cushion collar was moved to the cushion collar to cushion the piston, the through-hole that the inside oil of cushion collar was seted up can't pass through the cushion collar lateral wall, and oil passes through from the adjusting hole this moment for the oil of remaining in first hydraulic cylinder can be arranged totally, and the damping when moving inside the cushion collar is adjusted to the subassembly through hydraulic pressure buffering. The situation that the buffering piston cannot move to the bottom end of the buffering sleeve due to residual oil in the first hydraulic cylinder is avoided, the waste of the space of the first hydraulic cylinder is avoided, the damping of the section of stroke can be adjusted according to different situations, and the hydraulic cylinder is suitable for different working conditions.

The invention is further configured to: the hydraulic buffer assembly comprises an adjusting seat in threaded connection with the connecting seat, an adjusting piece arranged inside the adjusting seat, an adjusting wheel arranged at the top end of the adjusting seat, and an adjusting core matched with the adjusting hole and arranged at the adjusting piece (bottom end, the bottom end of the adjusting core is a cone, and the cone extends into the adjusting hole.

By adopting the technical scheme, the length of the cone body extending into the adjusting hole is changed, so that the radius difference between the cone body and the adjusting hole is changed, and the oil discharge amount passing through the adjusting hole is changed. If the oil discharge amount is large, the damping is small; the oil extraction volume is little, then the damping is great, changes the damping through the oil extraction volume that changes the regulation hole, and the convenience is to damped regulation to make and keep away the ware and can adjust different damping according to the operating mode of difference, increase the scope of using.

The invention is further configured to: the adjusting wheel is connected with the adjusting seat in a clamping mode, and the inside of the adjusting wheel is rotatably connected with a connecting bolt in threaded connection with the adjusting piece.

By adopting the technical scheme, the connecting bolt is in threaded connection with the adjusting piece, and the position of the adjusting piece in the adjusting seat can be adjusted by rotating the connecting bolt, so that the position of a vertebral body in the adjusting hole is changed, the damping is changed, and the damping is conveniently adjusted.

The invention is further configured to: the top end of the adjusting wheel is provided with an adjusting hole for adjusting the connecting bolt.

By adopting the technical scheme, the connecting bolt can be adjusted in the state that the adjusting wheel is not opened by the rotating hole, the position of the adjusting piece can be conveniently adjusted, and the damping can be further conveniently adjusted.

The invention is further configured to: a cavity is formed in the middle of the adjusting piece; and the adjusting core is connected with the bottom end of the adjusting piece in a sliding manner.

By adopting the technical scheme, the air cavity provides buffer for the sliding of the adjusting core on the adjusting piece, so that the throughput of oil passing through the adjusting hole has a slow change, and the damage to the adjusting hole or the adjusting piece caused by excessive movement of the adjusting valve is avoided.

The invention is further configured to: the gas filled in the gas cavity is nitrogen or inert gas.

By adopting the technical scheme, nitrogen or inert gas is stable in nature, so that the gas in the gas cavity is safer under the condition of being compressed, and the occurrence of danger is reduced.

The invention is further configured to: still seted up the round recess on the regulating part, the inside of recess supplies the sealing ring to place.

Through adopting above-mentioned technical scheme, in the recess was placed to the sealing ring, the gas tightness that increases connecting piece and shell and be connected reduced to appear because of the influence that gas leakage leads to in the air cavity adjusts the condition production of core work.

The invention is further configured to: a limiting bulge is arranged inside the adjusting seat, and a matching block is arranged on the adjusting piece; and the diameter of the matching block is larger than that of the circular ring formed by the limiting bulge.

Through adopting above-mentioned technical scheme, cooperation piece and protruding cooperation have restricted regulation core and the highest position of regulation hole complex, have avoided the condition that regulation core and regulation hole can not cooperate to appear.

In conclusion, the invention has the following beneficial effects: the invention avoids the situation that the buffering piston cannot move to the bottom end of the buffering sleeve due to residual oil in the first hydraulic cylinder, can adjust the damping according to different situations and increases the working range of the shock absorber.

Drawings

FIG. 1 is an overall sectional view of the embodiment;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is an enlarged view of a portion B of fig. 2.

In the figure: 1. a piston rod; 11. a first connecting ring; 12. a piston; 13. a cushion piston; 2. a hydraulic cylinder; 21. a second connection ring; 22. a buffer sleeve; 3. a connecting seat; 31. an oil passage; 32. an adjustment hole; 4. an adjustment assembly; 5. a cylinder barrel; 51. an oil cylinder; 52. a piston; 53. an air cylinder; 6. a hydraulic cushion assembly; 61. an adjusting seat; 611. a limiting bulge; 62. an adjustment member; 621. a cavity; 622. an air cavity; 623. a groove; 624. a matching block; 63. an adjustment wheel; 631. rotating the hole; 64. a connecting bolt; 65. adjusting the core; 651. a cone.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b): a vibration absorber, as shown in fig. 1, comprises a piston rod 1, a first hydraulic cylinder 2 connected with the piston rod 1 in a sliding manner, a connecting seat 3 fixed at one end of the hydraulic cylinder 2 far away from the piston rod 1, an adjusting component 4 fixed inside the connecting seat 3, a cylinder barrel 5 fixedly connected with the connecting seat 3, and a hydraulic buffer component 6 arranged on the connecting seat 3.

One end of the piston rod 1 far away from the connecting seat 3 is provided with a first connecting ring 11, and one end of the connecting seat 3 far away from the piston rod 1 is provided with a second connecting ring 21. The shock absorber is coupled to the vehicle body through the first coupling ring 11 and the second coupling ring 21.

A piston 12 is fixed on the part of the piston rod 1 extending into the first hydraulic cylinder 2, and a buffer piston 13 is fixed on one end of the piston rod 1 close to the connecting seat 3. A buffer sleeve 22 is connected to one end of the first hydraulic cylinder 2 close to the connecting seat 3 in a threaded manner. The piston 12 is connected with the inner wall of the first hydraulic cylinder 2 in a sliding way; the damping piston 13 has the same radius as the inner wall of the damping sleeve 22 and is slidable in the inner wall of the damping sleeve 22. The first hydraulic cylinder 2 is filled with oil for cushioning. The side wall of the buffer sleeve 22 is provided with a through hole (not shown in the figure in a half section), and the through hole is communicated with the connecting seat 3.

The first hydraulic cylinder 2 and the cylinder 5 are both fixed on the same side of the connecting seat 3 and are communicated through an oil passage 31 arranged inside the connecting seat 3. The end of the cylinder barrel 5 far away from the connecting seat 3 is sealed.

The cylinder tube 5 is divided into an oil tube 51 near the connecting socket 3 side and communicating with the oil passage 31 and an air tube 53 far from the connecting socket 3 side. The oil cylinder 51 and the air cylinder 53 are partitioned by a piston 52 slidably connected to the cylinder 5. The gas injected into the air tube 53 is nitrogen or inert gas.

An adjusting hole 32 matched with the hydraulic buffer component 6 is also opened on the connecting seat 3.

When the vehicle body bumps through an uneven road surface, the vehicle body or the piston rod 1 is driven to move towards or away from the connecting seat 3. When the piston rod 1 moves towards the direction approaching the connecting seat 3, the buffer piston 13 presses the oil in the first hydraulic cylinder 2 into the oil cylinder 51 through the oil passage 31. The oil in the oil cylinder 51 pushes the piston 52 to move away from the connecting base 3, and the piston 52 is driven to compress the gas in the air cylinder 53. When the piston rod 1 moves in a direction away from the connecting seat 3, the compressed air pushes the piston 52 to move in a direction close to the connecting seat 3, so that the oil in the oil cylinder 51 is pressed into the first hydraulic cylinder 2 through the oil passage 31. In the process of the circulation, the original violent movement process is eased, and the riding comfort is improved.

Referring to fig. 2, the hydraulic cushion assembly 6 includes an adjusting seat 61 screwed with the connecting seat 3, an adjusting member 62 disposed inside the adjusting seat 61, an adjusting wheel 63 disposed at a top end of the adjusting seat 61, a connecting bolt 64 disposed inside the adjusting wheel 63 and screwed with the adjusting member 62, and an adjusting core 65 engaged with the adjusting hole 32 and slidably connected with a bottom end of the adjusting member 62.

The middle of the adjusting member 62 is opened with a cavity 621. Together with the adjustment seat 61, the adjustment element 62 and the connected adjustment core 65, an air chamber 622 is formed. The air cavity 622 is filled with nitrogen or an inert gas. The adjusting piece 62 is further provided with a circle of groove 623, and the sealing ring is placed in the groove 623.

The adjusting wheel 63 is clamped with the adjusting seat 61, and a rotating hole 631 for adjusting the connecting bolt 64 is formed in the top end of the adjusting wheel 63.

The bottom end of the adjustment core 65 is a cone 651. The cone 651 extends into the adjustment hole 32, and the end of the cone 651 near the adjustment member 62 has the largest radius.

Referring to fig. 3, the inside of the adjusting seat 61 is provided with a limiting protrusion 611, and the adjusting member 62 is provided with a fitting block 624. The diameter of the fitting block 624 is larger than the diameter of the ring formed by the limiting protrusion 611, so that the fitting block 624 moves to the position of the limiting protrusion 611 and cannot move forward.

The use process comprises the following steps: the piston rod 1 moves towards the direction close to the connecting seat 3, and when the buffer piston 13 moves into the buffer sleeve 22, oil in the buffer sleeve cannot pass through the through hole formed in the side wall of the buffer sleeve 22 and needs to enter the oil passage 31 through the adjusting hole 32. The oil enters the adjusting hole 32 and will blow the adjusting core 65 under the action of the oil pressure, and drive the adjusting core 65 to move towards the direction close to the adjusting piece 62. So that a gap is formed between the cone 651 of the adjustment core 65 and the adjustment hole 32, through which oil flows, so that the damping piston 13 can move into the interior of the damping sleeve.

During this process, when the adjustment core 65 moves in a direction approaching the adjustment member 62, the volume in the air chamber 622 is reduced, which causes the air to compress, thereby providing a buffer for the movement of the adjustment core 65.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.

Claims

1. A vibration damper comprises a piston rod (1), a first hydraulic cylinder (2) connected with the piston rod (1) in a sliding manner, a connecting seat (3) fixed at one end of the first hydraulic cylinder (2) far away from the piston rod (1), an adjusting component (4) fixed in the connecting seat (3) and a cylinder (5) fixedly connected with the connecting seat (3);

a piston (12) is fixed on the part of the piston rod (1) extending into the first hydraulic cylinder (2), and a buffer piston (13) is fixed at one end of the piston rod (1) close to the connecting seat (3);

one end of the first hydraulic cylinder (2) close to the connecting seat (3) is in threaded connection with a buffer sleeve (22);

the piston (12) is connected with the inner wall of the first hydraulic cylinder (2) in a sliding way; the radius of the buffer piston (13) is the same as that of the inner wall of the buffer sleeve (22), and the buffer piston can slide in the inner wall of the buffer sleeve (22);

the first hydraulic cylinder (2) is filled with oil with a buffering function;

a through hole is formed in the side wall of the buffer sleeve (22), and the through hole is communicated with the connecting seat (3);

the first hydraulic cylinder (2) and the cylinder (5) are fixed on the same side of the connecting seat (3) and are communicated through an oil duct (31) arranged in the connecting seat (3);

one end of the cylinder barrel (5) far away from the connecting seat (3) is sealed;

the method is characterized in that: the hydraulic buffer component (6) is arranged on the connecting seat (3); an adjusting hole (32) matched with the hydraulic buffer component (6) is also communicated on the connecting seat (3);

the hydraulic buffer assembly (6) comprises an adjusting seat (61) in threaded connection with the connecting seat (3), an adjusting piece (62) arranged inside the adjusting seat (61), an adjusting wheel (63) arranged at the top end of the adjusting seat (61), and an adjusting core (65) matched with the adjusting hole (32) and arranged at the bottom end of the adjusting piece (62); the bottom end of the adjusting core (65) is a cone (651), and the cone (651) extends into the adjusting hole (32).

2. A resonator according to claim 1, wherein: adjusting wheel (63) and regulation seat (61) joint, the inside rotation of adjusting wheel (63) is connected with and adjusts piece (62) threaded connection's connecting bolt (64).

3. A resonator according to claim 2, wherein: the top end of the adjusting wheel (63) is provided with a rotating hole (631) for adjusting the connecting bolt (64).

4. A resonator according to claim 1, wherein: a cavity (621) is formed in the middle of the adjusting piece (62); an air cavity (622) is formed together with the adjusting seat (61), the adjusting piece (62) and the connected adjusting core (65); the adjusting core (65) is connected with the bottom end of the adjusting piece (62) in a sliding way.

5. A resonator according to claim 4, wherein: the gas filled in the air cavity (622) is nitrogen or inert gas.

6. A resonator according to claim 4, wherein: the adjusting piece (62) is further provided with a circle of groove (623), and the sealing ring is placed in the groove (623).

7. A resonator according to claim 1, wherein: a limiting bulge (611) is arranged in the adjusting seat (61), and a matching block (624) is arranged on the adjusting piece (62); and the diameter of the matching block (624) is larger than that of the circular ring formed by the limiting protrusion (611).