CN216045168U

CN216045168U - Damping force adjustable shock absorber capable of improving durability of electromagnetic valve

Info

Publication number: CN216045168U
Application number: CN202122472528.7U
Authority: CN
Inventors: 柳平波; 闫超
Original assignee: Jinbo Auto Parts Co ltd
Current assignee: Jinbo Auto Parts Co ltd
Priority date: 2021-10-14
Filing date: 2021-10-14
Publication date: 2022-03-15
Anticipated expiration: 2031-10-14

Abstract

The utility model discloses a damping force adjustable shock absorber capable of improving the durability of a solenoid valve, which comprises a working cylinder, a damping pipe and a piston rod, wherein a working cavity is formed in the working cylinder in a hollow mode, the damping pipe is positioned in the working cavity, a rebound cavity is formed in the damping pipe, a front end cover is fixed at the front part of the working cylinder, a piston valve is sleeved on the piston rod and positioned in the damping pipe, the rebound cavity is divided into an extension chamber and a pressing chamber by the piston valve, a low-pressure liquid storage cavity and a high-pressure cavity are formed in the working cavity, a circle of sealing partition plate is arranged on the outer wall of the damping pipe, the high-pressure cavity is formed by the sealing partition plate and the outer wall of the damping pipe in a surrounding mode, the high-pressure cavity is connected with the extension chamber through a communication hole formed in the outer wall of the damping pipe, and the low-pressure liquid storage cavity is formed by the sealing partition plate and the inner wall of the working cylinder in a surrounding mode; the side part of the working cylinder is connected with an electromagnetic valve, the electromagnetic valve is simultaneously connected with a low-pressure liquid storage cavity and a high-pressure cavity, and a magnetic assembly is arranged in the electromagnetic valve.

Description

Damping force adjustable shock absorber capable of improving durability of electromagnetic valve

Technical Field

The utility model relates to the technical field of shock absorbers, in particular to a damping force adjustable shock absorber capable of improving the durability of an electromagnetic valve.

Background

In the prior art, a damper with adjustable continuous damping is disclosed in the chinese invention with patent application No. CN202110122747.4, wherein a valve body is fixed in a valve seat of a damping solenoid valve, an overflow valve core, a valve plate, an overflow valve, a movable valve and a pressing cover are arranged in the valve body, a push rod pushed by a coil is arranged above the overflow valve core, the overflow valve core is provided with a valve core central hole and a valve core side hole, an overflow spring is arranged at the bottom of the overflow valve core, a notch groove is arranged on the upper end surface of the valve body inner hole, the movable valve is movably arranged in the valve body inner hole up and down, a spring is arranged between the movable valve and the overflow valve, a flow guiding gap is arranged between the lower end surface of the movable valve and the upper end surface of the pressing cover, the overflow valve is provided with an overflow valve, the movable valve is provided with a flow guiding hole, the flow guiding hole enables the overflow valve hole to be communicated with an oil inlet, the valve plate is provided with the valve plate central hole and the valve plate side hole, the valve core central hole and the valve plate central hole, The overflow valve holes are aligned up and down and are separated from each other by a certain distance. The electromagnetic coil is not electrified when the vehicle runs on a normal road, and the shock absorber realizes the shock absorption function of the shock absorber according to the shock absorption characteristic of the shock absorber; when the automobile runs on a very flat road, the coil is electrified with a small working current, and the damping rigidity of the damper becomes very small, so that the driving comfort of the automobile is improved; when the automobile runs on an uneven mountain road or a field road, after the coil is electrified with larger working current, the damping curve of the shock absorber changes suddenly at the moment, the shock absorption rigidity becomes very large at once, the automobile body is protected, and meanwhile, necessary shock absorption requirements are provided for a driver. Therefore, the shock absorber of the technical scheme can more reasonably adjust the shock absorption rigidity so as to drive the automobile in an economical and comfortable state.

The damping adjustable shock absorber in the above patent, however, is slow in response to the adjustment of the damping force, because the size of the diversion gap is adjusted by controlling the overflow valve hole, thereby controlling the hydraulic pressure of the damping fluid, therefore, the effect of adjusting the damping force is achieved, only one flow guide channel is provided, so that the pressurization and the backflow of the damping liquid are carried out in the flow guide channel, the efficiency is reduced, the adjustment reaction of the damping liquid to the damping force is delayed, in addition, the existing electromagnetic valve is limited by the current process, during the machining and assembling process, iron-containing impurities are inevitably generated inside the solenoid valve, and after the iron-containing impurities are mixed in the damping fluid, can cause the interference to the precision of damping force size, in addition, iron-containing impurity also can cause the wearing and tearing of solenoid valve inner wall along with damping fluid flows repeatedly in the solenoid valve, shortens the life of solenoid valve.

SUMMERY OF THE UTILITY MODEL

The present invention provides a shock absorber which can be adjusted quickly and can improve the durability of the solenoid valve in view of the above technical situation.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides an adjustable bumper shock absorber of damping force that can promote solenoid valve durability, includes working cylinder, damping tube and piston rod, the inside cavity of working cylinder is formed with the working chamber, the damping tube is arranged in the working chamber be formed with the chamber of rebounding in the damping tube the front portion of working cylinder is being fixed the front end housing, the front end housing can be simultaneously with the working chamber with the damping tube is sealed be formed with the terminal surface hole on the front end housing, the piston rod passes the terminal surface hole extends in the damping tube, the cover is equipped with the piston valve on the piston rod, the piston valve is arranged in the damping tube, and become extension room and pressing chamber with the chamber is separated into to the chamber of rebounding by the piston valve, be formed with low pressure stock solution chamber and high pressure chamber in the working chamber be provided with round sealed partition plate on the outer wall of damping tube, by sealed partition plate with the outer wall of damping tube encloses the high pressure chamber, the high-pressure cavity is connected with the extension chamber through a communicating hole formed in the outer wall of the damping tube, and the low-pressure liquid storage cavity is enclosed by the sealing partition plate and the inner wall of the working cylinder;

the side part of the working cylinder is connected with an electromagnetic valve, the electromagnetic valve is simultaneously connected with a low-pressure liquid storage cavity and a high-pressure cavity, and a magnetic assembly is arranged in the electromagnetic valve.

Preferably, the piston valve has a plurality of first flow passages formed along a circumferential direction, and the damping fluid may flow between the extension chamber and the pressing chamber through the first flow passages.

As an improvement of the present invention, a sliding valve block is provided in the solenoid valve, a low pressure hole and a high pressure hole are formed in the solenoid valve, the high pressure hole communicates with the high pressure chamber, the low pressure hole communicates with the low pressure reservoir chamber, and a fluid valve is provided at an end of the cylinder, the fluid valve communicating with the low pressure reservoir chamber and the pressing chamber.

As a further improvement of the present invention, the solenoid valve has a micro motor having a telescopic output shaft, and the sliding valve block is connected to an end portion of the output shaft, and is slidable between the low pressure port and the high pressure port.

Preferably, the magnetic assembly includes a ring-shaped magnet, a ring-shaped groove is formed on a wall of the high-pressure hole, and the ring-shaped magnet is embedded in the ring-shaped groove.

Compared with the prior art, the utility model has the advantages that: the high-pressure cavity is directly communicated with the extension chamber, when high damping force is needed, the low-pressure hole is closed by the electromagnetic valve, the fluid valve is closed, the connection between the electromagnetic valve and the low-pressure liquid storage cavity is cut off, so that the high-pressure cavity, the electromagnetic valve and the rebound cavity form a closed space, the volume of the closed space is far smaller than that of the closed space formed by the low-pressure liquid storage cavity, the electromagnetic valve and the rebound cavity, the hydraulic pressure is higher, the damping force is larger, on the contrary, when the sliding valve block retreats, the high-pressure hole is opened, the closed space of a low hydraulic environment is formed by the high-pressure cavity, the low-pressure liquid storage cavity, the electromagnetic valve and the rebound cavity, and the damping force is reduced. When switching, because high-pressure chamber and low pressure stock solution chamber are formed with great hydraulic pressure difference for during damping fluid in the high-pressure chamber can flow into low pressure stock solution chamber fast, in addition, the magnetism assembly in the solenoid valve can adsorb iron content impurity, extension solenoid valve's life.

Drawings

FIG. 1 is a schematic structural diagram of a damping force adjustable shock absorber capable of improving durability of an electromagnetic valve according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a portion of the magnetic assembly of FIG. 1;

fig. 3 is a side view of fig. 2.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in the accompanying drawings, the present embodiment is a damping force adjustable shock absorber capable of improving durability of a solenoid valve, and includes a working cylinder 1, a damping tube 2 and a piston rod 3, wherein a working chamber is formed in the working cylinder 1, the damping tube 2 is located in the working chamber, a rebound chamber is formed in the damping tube 2, a front end cover 4 is fixed at a front portion of the working cylinder 1, the front end cover 4 can simultaneously seal the rebound chamber in the working chamber and the damping tube 2 through an oil seal 20, a front end surface hole 41 is formed in the front end cover 4, a front portion of the piston rod 3 extends on an outer wall of the working chamber, a rear portion of the piston rod 3 extends in the rebound chamber of the damping tube 2 through the front end surface hole 41, a piston valve 5 is sleeved on the piston rod 3, the piston valve 5 is entirely located in the rebound chamber of the damping tube 2, and the rebound chamber is divided into an extension chamber 6 and a pressing chamber 7 by the piston valve 5.

The piston valve 5 is provided with a plurality of first flow passages 51 along the circumferential direction, damping fluid can flow between the extension chamber 6 and the pressing chamber 7 through the first flow passages 51, but the first flow passages 51 only form openings with small areas on the surface of the piston valve 5, so that the resistance of the damping fluid on the piston valve 5 in the reciprocating feeding process cannot be greatly influenced. Because the piston rod 3 can receive great instantaneous impact force when the vehicle vibrates, this kind of impact force can make piston rod 3 take place quick axial displacement itself, and then drive piston valve 5 quick travel in the rebound chamber, at this in-process, the volume of extending chamber 6 and pressing chamber 7 takes place quick change, make the hydraulic pressure difference between them change remarkably, thereby to the feed of piston valve 5 cause retardant effect, play the effect of damping buffering, the damping fluid in extending chamber 6 and the pressing chamber 7 circulates through first runner 51 afterwards, make both resume hydraulic pressure balanced again.

In order to adjust the damping force in this embodiment, the initial hydraulic pressure of the damping fluid in the rebound cavity needs to be adjusted, the adjustment is realized through the solenoid valve 8, specifically, a low-pressure fluid storage cavity 9 and a high-pressure cavity 10 are formed in the working cavity, a circle of sealing partition plate 11 is formed on the outer wall of the damping tube 2, the high-pressure cavity 10 is defined by the sealing partition plate 11 and the outer wall of the damping tube 2, a communication hole 12 is formed on the outer wall of the damping tube 2, two ends of the communication hole are respectively connected to the high-pressure cavity 10 and the extension chamber 6 inside the damping tube 2, so that the damping fluid can be communicated between the extension chamber 6 and the high-pressure cavity 10. The low-pressure liquid storage cavity 9 is surrounded by a sealing partition plate 11 and the inner wall of the working cylinder 1, a fluid valve 21 is arranged at the end part of the working cylinder 1, and the fluid valve 21 is communicated with the low-pressure liquid storage cavity 9 and the pressing chamber 7.

The electromagnetic valve 8 is connected to the side of the working cylinder 1, the micro motor 14 is installed on the electromagnetic valve 8, the micro motor 14 is provided with a telescopic output shaft 15, the output shaft 15 is driven by the micro motor 14 to rotate, so that axial telescopic displacement occurs, the end part of the output shaft 15 is connected with a sliding valve block 16, the sliding valve block can be driven by the output shaft 15 to axially move, a low-pressure hole 17 and a high-pressure hole 18 are formed in the electromagnetic valve 8, the low-pressure hole 17 is formed in the side of the electromagnetic valve 8, the electromagnetic valve 8 can be communicated with the low-pressure liquid storage cavity 9 through the low-pressure hole 17, the high-pressure hole 18 is formed in the connection position of the electromagnetic valve 8 and the working cylinder 1, and the interior of the electromagnetic valve 8 can be communicated with the high-pressure cavity 10 through the high-pressure hole 18. The sliding valve block 16 slides between the low-pressure hole 17 and the high-pressure hole 18, one of the two states is a high-pressure state, the sliding valve block 16 firstly blocks the low-pressure hole 17, simultaneously the fluid valve 21 is closed, the connection between the electromagnetic valve 8 and the low-pressure liquid storage cavity 9 is cut off, then the sliding valve block 16 continuously moves towards the direction of the high-pressure hole 18 until the high-pressure hole 18 is blocked, in the process, damping liquid in the electromagnetic valve 8 is pressed into the high-pressure cavity 10 by the sliding valve block 16, the high-pressure cavity 10, the electromagnetic valve 8 and the rebound cavity form a closed space, the hydraulic pressure of the damping liquid in the closed space is higher, so the damping force is higher, on the contrary, when the sliding valve block 16 is driven by the electromagnetic valve 8 to reset, the high-pressure hole 18 and the low-pressure hole 17 are all opened, and simultaneously the fluid valve 21 is opened, so that the low-pressure liquid storage cavity 9, the high-pressure cavity 10, the electromagnetic valve 8 and the rebound cavity form a closed space of a low-pressure environment, the closed space of such a low hydraulic pressure environment can reduce the damping force. When the damping force size switches, because high pressure chamber 10 and low pressure stock solution chamber 9 are formed with great hydraulic pressure difference for during damping fluid in the high pressure chamber 10 can flow into low pressure stock solution chamber 9 fast, promoted the governing speed, made the damping force adjust more rapidly.

Furthermore, in order to filter out ferrous impurities that the solenoid valve 8 inevitably forms during production, a magnetic assembly is provided in the solenoid valve 8. The magnetic assembly comprises an annular magnet 19, wherein a ring of annular groove is formed on the wall of the high-pressure hole 18, and the annular magnet 19 is embedded in the annular groove. When the liquid flows through the high-pressure hole 18, the ring magnet 19 can adsorb the iron-containing impurities in the damping liquid, and then the ring magnet 19 is taken out and cleaned.

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 utility model may occur to those skilled in the art without departing from the principle of the utility model, and are considered to be within the scope of the utility model.

Claims

1. The utility model provides an adjustable bumper shock absorber of damping force that can promote solenoid valve durability, including working cylinder, damping tube and piston rod, the inside cavity of working cylinder is formed with the working chamber, the damping tube is located in the working chamber be formed with the rebound chamber in the damping tube the front end housing is being fixed to the working cylinder front portion, the front end housing can will simultaneously the working chamber with the damping tube is sealed be formed with the terminal surface hole on the front end housing, the piston rod passes the terminal surface hole extends in the damping tube the cover is equipped with the piston valve on the piston rod, the piston valve is located in the damping tube, and by the piston valve will the rebound chamber is separated into and is extended room and press the room, its characterized in that: a low-pressure liquid storage cavity and a high-pressure cavity are formed in the working cavity, a circle of sealing partition plate is arranged on the outer wall of the damping tube, the high-pressure cavity is formed by the sealing partition plate and the outer wall of the damping tube in an enclosing mode, the high-pressure cavity is connected with the extension chamber through a communication hole formed in the outer wall of the damping tube, and the low-pressure liquid storage cavity is formed by the sealing partition plate and the inner wall of the working cylinder in an enclosing mode; the side part of the working cylinder is connected with an electromagnetic valve, the electromagnetic valve is simultaneously connected with a low-pressure liquid storage cavity and a high-pressure cavity, and a magnetic assembly is arranged in the electromagnetic valve.

2. The damping force adjustable shock absorber capable of improving durability of a solenoid valve according to claim 1, wherein: a plurality of first flow passages are formed in the piston valve along the circumferential direction, and damping fluid can circulate between the extension chamber and the pressing chamber through the first flow passages.

3. The damping force adjustable shock absorber capable of improving durability of a solenoid valve according to claim 1, wherein: the electromagnetic valve is provided with a sliding valve block, a low-pressure hole and a high-pressure hole are formed in the electromagnetic valve, the high-pressure hole is communicated with the high-pressure cavity, the low-pressure hole is communicated with the low-pressure liquid storage cavity, and the end part of the working cylinder is provided with a fluid valve which is communicated with the low-pressure liquid storage cavity and the pressing cavity.

4. The damping force adjustable shock absorber capable of improving durability of a solenoid valve according to claim 3, wherein: the electromagnetic valve is provided with a micro motor, the micro motor is provided with a telescopic output shaft, the sliding valve block is connected to the end part of the output shaft, and the sliding valve block can slide between the low-pressure hole and the high-pressure hole.

5. The damping force adjustable shock absorber capable of improving durability of a solenoid valve according to claim 3, wherein: the magnetic assembly comprises an annular magnet, a ring of annular groove is formed on the wall of the high-pressure hole, and the annular magnet is embedded in the annular groove.