CN212360614U

CN212360614U - Shock absorber with positioning function

Info

Publication number: CN212360614U
Application number: CN202020632977.6U
Authority: CN
Inventors: 黄震; 周惠妮; 毛志成
Original assignee: Zhejiang Roadtamer Auto Parts Co ltd
Current assignee: Zhejiang Roadtamer Auto Parts Co ltd
Priority date: 2020-04-24
Filing date: 2020-04-24
Publication date: 2021-01-15
Anticipated expiration: 2030-04-24

Abstract

The invention belongs to the technical field of automobile parts, and particularly relates to a shock absorber with a positioning function. The shock absorber comprises a cylinder body, a hollow piston rod, a control rod and a piston arranged at one end of the hollow piston rod, wherein the piston is positioned in the cylinder body and divides the cylinder body into a recovery cavity and a compression cavity, and the control rod is sleeved in the hollow piston rod; the hollow piston rod is provided with a tail section, the control rod is provided with a control section corresponding to the tail section, the control section is provided with a flow control channel, the side wall of the control section is provided with a first hole, and the part of the hollow piston rod corresponding to the first hole is provided with a second hole; the tail section of the hollow piston rod is also provided with an auxiliary piston and a limiting cover, a floating piston is arranged in the cylinder body of the shock absorber, and a rotary shifting piece is arranged on the control outside the cylinder body. According to the invention, the control rod is rotated to control the communication and the closing of oil liquid between the restoration cavity and the compression cavity in the cylinder body, so that the functions of damping and positioning provided by the shock absorber are realized.

Description

Shock absorber with positioning function

Technical Field

The invention belongs to the technical field of automobile parts, and particularly relates to a shock absorber with a positioning function.

Background

With the development of the automobile industry, the requirements for safety and comfort of automobiles are increasingly refined, and the driving comfort and safety can be guaranteed by a chassis suspension and a seat suspension structure.

In terms of chassis suspension, air suspensions have long been used in large trucks, high-end cars, etc., early air suspensions used air bags as elastic elements to provide support and stiffness, conventional dual-tube or mono-tube shock absorbers as damping elements to provide damping, and auxiliary springs as emergency members to prevent accidents such as roll, rollover, etc. due to failure of the air bags. Later stage automotive industry further develops, the adjustable shock absorber of damping has been used, this type of shock absorber can carry out the damping to different road conditions and driving habits and adjust, and air suspension structure also surveys down from large-scale freight train and high-end car step by step, now, has begun to spread to medium-sized freight train, light truck and middle-end car, consequently, this structure both must guarantee that the function is complete, need face increasingly narrow and small installation space again, just need merge auxiliary spring and shock absorber, so, require the shock absorber can provide the damping when normally traveling, when the gasbag became invalid, can support the suspension.

In the aspect of the seat, the comfortable seat can ensure that a driver is concentrated on driving, the spine and the back of the driver are protected from being healthy, and the driver is ensured to have a good visual field by a proper height. Normally, the air bag serves as an elastic element to provide proper height and rigidity for the seat, and the shock absorber serves as a damping element to provide proper damping; when the air bag is invalid, the support and the proper height and rigidity cannot be provided for the seat, the seat collapses and can only stay at the lowest design position, the visual field of a driver is influenced, the vibration of the chassis is amplified by the moving seat, the injury to the spine of the driver is large during driving, the driving process is not comfortable, and the fatigue and the distraction are very easy to occur, so that the driving safety is influenced. Therefore, newly developed automobiles require a seat that can further attenuate vibration from the chassis, can ensure the most basic safety even if comfort is lost when the airbag fails, and require a damper that takes over the support function of the airbag, becomes a rigid body, provides a seat with an appropriate height, but cannot expand and contract, so a seat suspension to which the airbag is attached needs a damper that can damp vibration and can position the seat at an arbitrary position when the airbag fails.

Most of the shock absorbers on the market at present only have the function of providing damping, or adjust the provided damping and do not have the function of positioning. The patent application with the application number of CN201120397958.0 discloses a damping adjustable shock absorber for an air suspension, which comprises a shock absorber working cylinder, wherein a liquid storage cylinder is sleeved outside the shock absorber working cylinder, one end of the liquid storage cylinder is connected with a limiting block, and the other end of the liquid storage cylinder is connected with a base; one end of the working cylinder of the shock absorber is connected with the limiting block, and a bottom valve is arranged between the other end of the working cylinder of the shock absorber and the base; a hollow piston rod and a piston assembly sleeved on the hollow piston rod are arranged in the working cylinder of the shock absorber; a valve component for adjusting the damping of the shock absorber is also arranged in the working cylinder of the shock absorber; the damping adjustable shock absorber for the air suspension can adjust the damping, but cannot perform a positioning function on a hollow piston rod when an air bag of an automobile fails.

Disclosure of Invention

In view of the above mentioned problems, the present invention provides a vibration damper with a positioning function, which has a strong positioning effect and is convenient to operate.

A shock absorber with a positioning function comprises a cylinder body, a hollow piston rod, a control rod and a piston arranged at one end of the hollow piston rod, wherein one end of the hollow piston rod, which is provided with the piston, is arranged in the cylinder body, and the piston divides the inner area of the cylinder body into a restoration cavity with variable volume and a compression cavity; the control rod is sleeved inside the hollow piston rod and used for controlling communication and flow-off between the recovery cavity and the compression cavity.

Preferably, the hollow piston rod has an end section and the piston is mounted on the end section; the part of the control rod corresponding to the tail section of the piston rod is provided with a control section, and the control section is connected with the tail section in a sealing way; the control section is provided with a flow control channel which is communicated with the compression cavity constantly and is communicated with the recovery cavity in a controlled way or closed in a way of rotating the control rod.

Preferably, a first hole is radially formed in the wall of the control section corresponding to the flow control channel, and a second hole is radially formed in the position, opposite to the first hole, of the tail section of the hollow piston rod; first hole and second hole all are located recover the intracavity, first hole and second hole can carry out coincidence each other and stagger along with the rotation of control lever to control fluid circulates between recovering chamber and compression chamber.

Preferably, the shock absorber further comprises an auxiliary piston, the auxiliary piston is arranged on the tail end of the hollow piston rod and is positioned in the recovery cavity and divides the recovery cavity with the variable volume into a first cavity and a second cavity; and the auxiliary piston is also provided with an oil passage for communicating the first cavity and the second cavity.

Preferably, the shock absorber further comprises a limit cap having an inner space and mounted on the end section of the hollow piston rod, the limit cap being located in the second chamber; the inner space of the limiting cover is communicated with the second hole; the inner space of the limiting cover is communicated with the second cavity through the side wall of the limiting cover.

Preferably, the shock absorber further comprises a floating piston dividing the compression chamber into a third chamber and a fourth chamber; the third cavity is an oil pressure cavity, the fourth cavity is an air pressure cavity, and the air pressure cavity can compensate the volume of the hollow piston rod positioned outside the cylinder body when the hollow piston rod extends into the cylinder body.

Preferably, the joint of the floating piston and the inner wall of the cylinder body is sealed, and the joint of the piston and the inner wall of the cylinder body and the joint of the piston and the tail end of the hollow piston rod are sealed.

Preferably, a control rod which is positioned outside the cylinder body and sleeved inside the hollow piston rod is provided with a shifting piece which controls the control rod to rotate.

Preferably, the outside of the cylinder body is further sleeved with a protective cover, the protective cover is arranged on a hollow piston rod located outside the cylinder body, and the protective cover can slide outside the cylinder body along with the expansion and contraction of the hollow piston rod, so that the joint of the hollow piston rod and the cylinder body is covered by a cage, and the performance of the shock absorber is prevented from being affected by accumulated dust.

The invention has the following beneficial effects:

1. set up one through the end at the inside hollow piston rod of cylinder body and separate into the piston that recovers chamber and compression chamber with the cylinder body, and cup joint a control lever that is equipped with the flow control passageway that the intercommunication recovers chamber and compression chamber inside the hollow piston rod, then through the intercommunication and the outage of adjusting control lever control recovery chamber and compression chamber, realize providing damping or locate function of shock absorber, when recovering chamber and compression chamber intercommunication, the inside fluid of cylinder body can circulate, hollow piston rod can stretch out and draw back, the shock absorber only has the function of providing damping this moment, when recovering chamber and compression chamber outage, the inside fluid of cylinder body can not circulate, hollow piston rod also can not stretch out and draw back, the shock absorber only has locate function this moment.

2. The first hole and the second hole are formed in the tail section of the hollow piston rod and the control section of the control rod, and then the control rod is adjusted to control the first hole and the second hole to be overlapped and staggered, so that the communication and the flow interruption of the recovery cavity and the compression cavity are controlled, the damping and positioning functions of the shock absorber are switched, and the operation is simple and rapid.

3. Through set up vice piston on hollow piston rod, can produce the hindrance to the fluid flow when restoring chamber and compression chamber intercommunication, produce the resistance to the concertina movement of hollow piston rod simultaneously to promote the damping effect of shock absorber.

4. The limiting cover is arranged at the tail end of the hollow piston rod, so that an oil path channel formed by the first hole, the second hole and the flow control channel can be effectively avoided, and other parts are prevented from covering the hole opening area of the hollow piston rod to cause blockage.

5. The floating piston is arranged in the cylinder body to divide the cylinder body into an oil pressure cavity and an air pressure cavity, so that the volume of the hollow piston rod positioned outside the cylinder body can be compensated by the air pressure cavity when the hollow piston rod extends into the cylinder body.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the end structure of the hollow piston rod of the present invention;

FIG. 3 is a schematic structural diagram of a transfer sheet of the present invention;

in the figure: 1 is a cylinder body, 11 is a recovery cavity, 111 is a first cavity, 112 is a second cavity, 12 is a compression cavity, 121 is a third cavity, 122 is a fourth cavity, 2 is a hollow piston rod, 20 is a tail section, 3 is a control rod, 30 is a control section, 300 is a control channel, 301 is a first hole, 302 is a second hole, 4 is a piston, 5 is an auxiliary piston, 50 is an oil passage, 6 is a limit cover, 7 is a floating piston, 8 is a transfer plate, and 9 is a limit cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a shock absorber with a positioning function, which mainly comprises a cylinder 1, a hollow piston rod 2, a control rod 3 and a piston 4 arranged at one end of the hollow piston rod 2, wherein the end of the hollow piston rod 2 provided with the piston 4 is arranged inside the cylinder 1, and the piston 4 divides the internal area of the cylinder 1 into a recovery cavity 11 with a variable volume and a compression cavity 12; in order to facilitate the control of the communication and the flow interruption between the recovery chamber 11 and the compression chamber 12, the control rod 3 is sleeved inside the hollow piston rod 2.

In order to further optimize the control of the communication and the flow interruption between the recovery chamber 11 and the compression chamber 12, the hollow piston rod 2 may be provided with an end section 20 and the piston 4 on the end section 20; a control section 30 is arranged on the control rod 3 at a position opposite to the end section 20 of the hollow piston rod, the end section 20 is hermetically connected with the control section 30, the control section 30 is provided with a flow control channel 300 which is constantly communicated with the compression cavity 12, and the flow control channel 300 can be communicated with or closed by rotating the control rod 3 with the recovery cavity 11; a first hole 301 is radially arranged on the wall of the control section 30 corresponding to the flow control channel 300, a second hole 302 is radially arranged on the position of the tail section 20 of the hollow piston rod 2 corresponding to the first hole 301, and the first hole 301 and the second hole 302 can be mutually overlapped and staggered along with the rotation of the control rod 3, so that the communication and the closing of the flow control channel 300 and the recovery cavity 11 are realized.

The end section 20 of the hollow piston rod 2 is also provided with an auxiliary piston 4, the auxiliary piston 4 is positioned in the recovery cavity 11 and divides the recovery cavity 11 with variable volume into a first cavity 111 and a second cavity 112, the first cavity 111 and the second cavity 112 are communicated through an oil passage on the auxiliary piston 4, the auxiliary piston 4 can block the oil flow when the recovery cavity 11 is communicated with the compression cavity 12, and meanwhile, resistance is generated on the telescopic motion of the hollow piston rod 2, and the damping effect of the shock absorber is improved; the end section of the hollow piston rod 2 is also provided with a limit cover 6 with an inner space, the limit cover 6 is positioned in the second cavity 112, the inner space of the limit cover 6 is communicated with the second hole 302, and meanwhile, the inner space of the limit cover 6 is also communicated with the second cavity 112 through the side wall of the limit cover 6. Inside the cylinder body 1, still be provided with floating piston 7, floating piston 7 separates compression chamber 12 into third chamber 121 and fourth chamber 122, and third chamber 121 is the oil pressure chamber, and fourth chamber 122 is the atmospheric pressure chamber, and when hollow piston rod 2 compressed in cylinder body 1, because hollow piston rod 2 still has certain volume in the outside of cylinder body 1, can carry out volume compensation when stretching out and drawing back to hollow piston rod 2 inside cylinder body 1 through the atmospheric pressure chamber. In order to control the control rod 3 to rotate conveniently, a dial plate 8 is further arranged on the control rod 3 positioned outside the cylinder body 1, the control rod 3 can be controlled to rotate by dialing the dial plate 8, and therefore the first hole 301 and the second hole 302 are controlled to be overlapped and staggered. In order to prevent external dust from entering the joint of the hollow piston rod 2 and the cylinder body 1 and affecting the performance of the shock absorber, a protective cover 9 is further sleeved outside the cylinder body 1, the protective cover 9 is mounted on the hollow piston rod 2 located outside the cylinder body 1 and can slide outside the cylinder body 1 along with the expansion of the hollow piston rod 2, so that the joint of the hollow piston rod 2 and the cylinder body 2 is covered, and the dust is prevented from accumulating.

When the shock absorber with the positioning function is used, the control rod is adjusted to enable the first hole 301 and the second hole 302 to be overlapped, oil in the cylinder body 1 can flow between the recovery cavity 11 and the compression cavity 12 through the auxiliary piston 5 and the flow control channel 300 under the pushing action of the hollow piston rod 2, and the hollow piston rod 2 can stretch and retract to achieve the damping function of the shock absorber; when the control rod is adjusted to enable the first hole 301 and the second hole 302 to be staggered, oil in the recovery cavity 11 and the compression cavity 12 can not flow mutually, the piston 4 in the cylinder body 1 can not move any more due to the fact that the oil can not be compressed, the hollow piston rod 2 can not stretch out and draw back any more, and the positioning function of the shock absorber is achieved.

Claims

1. A shock absorber with a positioning function comprises a cylinder body (1), a hollow piston rod (2), a control rod (3) and a piston (4) arranged at one end of the hollow piston rod (2), wherein one end, provided with the piston (4), of the hollow piston rod (2) is arranged in the cylinder body (1), and the inner area of the cylinder body (1) is divided into a restoration cavity (11) with a variable volume and a compression cavity (12); the method is characterized in that: the control rod (3) is sleeved inside the hollow piston rod (2) and used for controlling communication and cutoff between the recovery cavity (11) and the compression cavity (12).

2. A vibration damper with a positioning function according to claim 1, wherein: the hollow piston rod (2) is provided with an end section (20), and the piston (4) is arranged on the end section (20); the part of the control rod (3) corresponding to the tail section of the hollow piston rod (2) is provided with a control section (30), and the control section (30) is connected with the tail section (20) in a sealing way; the control section (30) is provided with a flow control channel (300) which is communicated with the compression cavity (12) constantly and is communicated with or closed off from the recovery cavity (11) in a controlled manner by rotating the control rod (3).

3. A vibration damper with a positioning function according to claim 2, wherein: a first hole (301) is radially formed in the wall of the control section corresponding to the flow control channel (300), and a second hole (302) is radially formed in the position, opposite to the first hole (301), of the tail section of the hollow piston rod (2); the first hole (301) and the second hole (302) are both positioned in the restoration cavity (11).

4. A vibration damper with a positioning function according to claim 3, wherein: the shock absorber further comprises an auxiliary piston (5), the auxiliary piston (5) is arranged on the tail end of the hollow piston rod (2), the auxiliary piston (5) is located in the recovery cavity (11) and divides the recovery cavity (11) with the variable volume into a first cavity (111) and a second cavity (112); and an oil passage (50) communicated with the first cavity (111) and the second cavity (112) is arranged on the auxiliary piston (5).

5. The damper with positioning function as claimed in claim 4, wherein: the shock absorber further comprises a limit cover (6) which is provided with an inner space and is arranged at the tail end of the hollow piston rod (2), wherein the limit cover (6) is positioned in the second cavity (112) and covers the second hole (302) on the hollow piston rod (2).

6. The damper with positioning function according to claim 5, wherein: the inner space of the limiting cover (6) is communicated with the second hole (302), and the inner space of the limiting cover (6) is communicated with the second cavity (112) through the side wall of the limiting cover (6).

7. A vibration damper with a positioning function according to claim 1, wherein: said shock absorber further comprising a floating piston (7), said floating piston (7) dividing said compression chamber (12) into a third chamber (121) and a fourth chamber (122); the third cavity (121) is an oil pressure cavity, and the fourth cavity (122) is an air pressure cavity.

8. A vibration damper with a positioning function according to claim 7, wherein: the floating piston (7) is sealed at the joint of the inner wall of the cylinder body (1), and the piston (4) is sealed at the joint of the inner wall of the cylinder body (1) and the joint of the piston (4) and the tail section of the hollow piston rod (2).

9. A vibration damper with a positioning function according to claim 1, wherein: and a rotating and shifting sheet (8) which is positioned outside the cylinder body (1) and is sleeved on the control rod (3) inside the hollow piston rod (2) and used for controlling the control rod (3) to rotate is arranged on the control rod (3).

10. A vibration damper with a positioning function according to claim 1, wherein: the cylinder body (1) is further sleeved with a protective cover (9), and the protective cover (9) is arranged on a hollow piston rod (2) located outside the cylinder body (1).