CN114877010A - A double-cylinder vehicle shock absorber and method of using the same - Google Patents

Abstract

The invention belongs to the field of automobile manufacturing, and in particular relates to a double-cylinder vehicle shock absorber and a method for using the same. The side wall contacts, and the inner cylinder is divided into the upper oil chamber of the inner cylinder and the lower oil chamber of the inner cylinder; the outer cylinder includes the regulating piston and the outer cylinder, and the regulating piston divides the outer cylinder into the upper oil chamber and the lower oil chamber oil cavity; a first oil circulation channel is set between the upper oil cavity of the outer cylinder and the upper oil cavity of the inner cylinder, and a second oil circulation channel is set between the lower oil cavity of the outer cylinder and the lower oil cavity of the inner cylinder; the upper oil cavity of the outer cylinder and the inner cylinder There is an adjustment channel between the lower oil chambers of the cylinder, and the piston moves up and down to adjust the size of the adjustment channel, so that when facing different road conditions, the cross-sectional area of the oil flow can be adjusted in time to improve the shock absorption effect.

Description

A double-cylinder vehicle shock absorber and method of using the same

technical field

The invention belongs to the field of automobile shock absorption, and particularly relates to a double-cylinder vehicle shock absorber and a use method thereof.

Background technique

The shock absorber is used to suppress the shock of the rebound after the spring absorbs the shock and the impact from the road surface. It is widely used in automobiles to accelerate the attenuation of the vibration of the frame and the body to improve the stability of the car; with the continuous development of science and technology With development, people have higher and higher requirements for vehicle stability, comfort and safety during travel, so the importance of vehicle shock absorbers has become more and more prominent.

Most of the shock absorbers used in the existing automobile suspension system are two-way acting cylinder hydraulic shock absorbers. The piston moves up and down, and the hydraulic oil in the shock absorber chamber repeatedly flows from one chamber to another through different pores. At this time, the friction between the hole wall and the hydraulic oil and the internal friction between the hydraulic oil molecules form a damping force on the vibration, so that the vibration energy of the car is converted into the heat energy of the hydraulic oil, which is then absorbed by the shock absorber and released into the atmosphere. The entire shock absorber has many structural components, complex structure, and difficult maintenance. During the driving process of the vehicle, the shock absorber is difficult to adjust in real time according to the road surface conditions, which makes the driving process of the vehicle less comfortable and stable.

SUMMARY OF THE INVENTION

The present invention provides a double-cylinder vehicle shock absorber and a method of using the same. By arranging an inner cylinder and an outer cylinder, and setting each circulation channel and an adjustment channel, the inner cylinder, the outer cylinder, and the inner cylinder and the outer cylinder are realized. At the same time, through the relative coincidence position of the regulating piston in the outer cylinder and the regulating channel, the oil circulation area is changed, so that in the face of different road conditions, it can be adjusted in time to improve the shock absorption effect of the shock absorber, thereby ensuring the vehicle Ride smoothness, comfort and safety.

A dual-cylinder vehicle shock absorber, comprising:

The inner cylinder includes a piston rod and an inner cylinder body, the piston rod penetrates through the top of the inner cylinder body and is in contact with the side wall of the inner cylinder body, and divides the inner cylinder body into an inner cylinder upper oil chamber and an inner cylinder body. Lower oil chamber of inner cylinder;

The outer cylinder includes a regulating piston and an outer cylinder body, the regulating piston divides the outer cylinder body into an upper oil chamber of the outer cylinder and a lower oil chamber of the outer cylinder; the upper oil chamber of the outer cylinder and the upper oil chamber of the inner cylinder A first oil circulation channel is opened, a second oil circulation channel is opened between the lower oil chamber of the outer cylinder and the lower oil chamber of the inner cylinder; between the upper oil chamber of the outer cylinder and the lower oil chamber of the inner cylinder An adjustment channel is opened, and the adjustment piston moves up and down with the oil flow to adjust the size of the adjustment channel.

By arranging the inner cylinder and the outer cylinder, and setting up various circulation channels and adjustment channels, the oil circulation between the inner cylinders, between the outer cylinders, and between the inner cylinder and the outer cylinder is realized; The relative coincidence position changes the oil flow area, so that in the face of different road conditions, it can be adjusted in time to improve the shock absorption effect of the shock absorber, thereby ensuring the stability, comfort and safety of the vehicle.

Further, it also includes an oil storage cylinder, which is placed inside the piston rod; it includes an oil and gas separation piston, and the oil and gas separation piston divides the oil storage cylinder into a gas cylinder and an oil liquid cylinder, and the end of the oil storage cylinder is equipped with a piston. end cover; a compensation valve and a compression valve are arranged on the piston end cover, the compensation valve is a pressure valve that conducts the oil from the oil cylinder to the lower oil chamber of the inner cylinder in one way, and the compression valve is the The lower oil chamber of the inner cylinder is a pressure valve that conducts the oil in one direction to the oil cylinder.

By arranging the oil storage cylinder inside the piston rod, the space is rationally utilized to realize the direct oil circulation between the oil storage cylinder and the inner cylinder; by setting the compensation valve and the compression valve, the pressure difference between the inner cylinder and the outer cylinder is adjusted to expand the shock absorption range while improving the shock absorption effect.

Further, the piston end cover penetrates through the oil storage cylinder and is connected with the piston rod through a connecting bolt, so as to achieve a guiding effect for the up and down movement of the oil and gas separation piston.

Further, a rubber gasket is provided between the connecting bolt and the piston end cover for sealing.

By setting the rubber gasket, it acts as a seal between the bolt and the piston end cover.

Further, the regulating piston includes a first steel ring and a second steel ring, the first steel ring and the second steel ring are connected by a connecting ring; the connecting ring is provided with a plurality of A first through groove corresponding to the adjustment channel, the first through groove penetrates the connecting ring in the radial direction; the first steel ring is provided with a plurality of second through grooves respectively communicating with the first through grooves , the second through groove penetrates the first steel ring in the axial direction; when the first steel ring overlaps with the adjustment channel, the adjustment channel is closed.

During the upward movement of the regulating piston, the first through groove communicates with the regulating channel, thereby realizing the oil circulation between the lower oil chamber of the inner cylinder and the upper oil chamber of the outer cylinder; during the downward movement of the regulating piston, it communicates with the upper oil chamber of the inner cylinder and the upper oil chamber of the outer cylinder. The upper oil cavity of the outer cylinder realizes the oil circulation.

Further, the upper ends of the outer walls of the inner cylinder and the outer cylinder are respectively welded with the upper end cover of the shock absorber; the lower ends of the outer walls of the inner cylinder and the outer cylinder are respectively welded with the lower end cover of the shock absorber.

By arranging the upper end cover of the shock absorber and the lower end cover of the shock absorber, the inner cylinder and the outer cylinder of the shock absorber are protected.

Further, an adjusting spring is arranged in the lower oil chamber of the outer cylinder, one end of which is connected to the bottom end of the adjusting piston through the adjusting piston spring snap, and the other end is connected to the lower end cover of the shock absorber via the adjusting spring connecting snap.

By arranging the adjusting spring, the adjusting piston has a buffering effect with the lower end cover of the shock absorber in the process of moving up and down along the outer cylinder, so as to play a protective effect.

Further, an upper lifting lug is arranged at one end of the piston rod in contact with the external environment, a spring seat is arranged between the upper lifting lug and the piston rod, the bottom of the upper lifting lug passes through the spring seat, and is connected with the piston rod. Thread fit.

Further, it also includes a shock absorber spring, one end of which is connected to the spring seat through the first shock absorber spring connection buckle; the other end is connected to the upper end cover of the shock absorber through the second shock absorber spring connection buckle.

By arranging the shock absorber springs on the upper end cover of the shock absorber and under the upper hanging lugs respectively, the piston rod can play a buffering role in the movement process.

A method of using the above-mentioned dual-cylinder vehicle shock absorber, comprising the following steps:

S1: When the road surface condition is raised during the driving process of the vehicle, the load on the shock absorber increases, the piston rod is pressed down and extends into the shock absorber, and the adjustment piston moves up to make the adjustment channel conduct, and the lower oil chamber of the inner cylinder The oil is exchanged with the upper oil chamber of the outer cylinder through the adjustment channel;

S2: When the road surface is concave when the vehicle is driving, the load on the shock absorber is reduced, the piston rod is moved up and out of the shock absorber by the spring, the adjustment piston moves down to make the adjustment channel conduct, and the lower oil chamber of the inner cylinder The oil is exchanged with the upper oil chamber of the outer cylinder through the adjustment channel.

The beneficial effects of the present invention are:

1. The present invention is based on a spring damping system. An adjusting piston is arranged in the outer cylinder of the shock absorber. By cooperating with the adjusting piston and the adjusting channel, the relative positions of the two are changed, and the cross-sectional area of the oil flowing through the adjusting channel is changed, so that the In the face of different road conditions, the vehicle can make real-time adjustments according to the current road conditions, that is to say, under the different relative movement trends between the axle and the frame, the cross-sectional area of the oil flow in the adjustment channel is automatically adjusted to improve the shock absorber. The shock absorption effect, thereby improving the stability, comfort and safety of the vehicle during driving.

2. During the working process of the shock absorber in the present invention, the oil in the outer cylinder is continuously circulated, which is easy to dissipate the heat generated during the circulation of the oil in the inner and outer cylinders to the external environment, effectively reducing the shock absorber. heat, extending the life of the shock absorber.

3. The present invention adopts a double-cylinder structure, and the oil storage cylinder is arranged inside the piston rod to improve the space utilization rate, and the piston rod is connected to the frame, and the outer cylinder and the inner cylinder are connected to the wheel during the use of the shock absorber. , the vibration of the frame will be smaller than that of the wheel after shock absorption by the shock absorber, thus making the vehicle more stable; at the same time, the oil storage cylinder is divided into a gas cylinder and an oil cylinder by the oil and gas separation piston, and the low pressure is injected into the gas cylinder. Nitrogen increases the density of the oil, reduces air bubbles, and prevents the generation of oil and gas at high temperatures, thereby eliminating the foaming phenomenon of the shock absorber oil and reducing the driving noise.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the three-dimensional structure schematic diagram of regulating piston;

Fig. 3 is the top-view structure schematic diagram of regulating piston;

Fig. 4 is the structural representation of section A-A in Fig. 3;

FIG. 5 is a schematic side view of the structure of the adjusting piston.

Reference number:

1. The upper end cover of the shock absorber; 2. The second shock absorber spring connection buckle; 3. The sealing assembly; 4. The first shock absorber spring connection buckle; 5. The spring seat; Shock spring; 8. Upper oil chamber of inner cylinder; 9. First oil circulation channel; 10. Upper oil chamber of outer cylinder; 11. Inner cylinder body; 12. Outer cylinder body; 13. Piston rod; 14. Gas cylinder ;15, oil and gas separation piston; 16, oil cylinder; 17, compression valve; 18, piston end cover; 19, connecting bolt; 20, rubber gasket; 21, compensation valve; 22, lower oil chamber of inner cylinder; 23, Adjusting channel; 24. Adjusting piston; 25. Adjusting piston spring buckle; 26. Adjusting spring; 27. Adjusting spring connecting buckle; 28. Lower oil chamber of outer cylinder; 29. Second oil circulation channel; 30. Damping 31, the lower lifting lug; 32, the first steel ring; 33, the second steel ring; 34, the connecting ring; 35, the first through groove; 36, the second through groove.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation or a specific orientation. construction and operation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise expressly specified and limited, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

What is shown in FIG. 1 is a double-cylinder vehicle shock absorber, which includes an inner cylinder, an outer cylinder and an oil storage cylinder, and the oil storage cylinder is arranged inside the piston rod 13 to realize the inner cylinder, the outer cylinder, the inner cylinder and the outer cylinder. between the inner cylinder and the oil storage cylinder; at the same time, a regulating piston 24 is arranged in the outer cylinder, and an regulating passage 23 is arranged between the outer cylinder and the inner cylinder. The oil circulation and cross-sectional area enable real-time adjustment to improve the shock absorption effect of the shock absorber in the face of different road conditions, thereby ensuring the stability, comfort and safety of the vehicle.

Specifically, the inner cylinder includes a piston rod 13 and an inner cylinder block 11. The piston rod 13 penetrates through the top of the inner cylinder block 11 and is in contact with the side wall of the inner cylinder block 11, dividing the inner cylinder block 11 into an inner cylinder upper oil cavity 8 and the lower oil chamber 22 of the inner cylinder; through the up and down movement of the piston rod 13, the oil pressure in the inner cylinder is changed.

Specifically, the outer cylinder includes a regulating piston 24 and an outer cylinder body 12, and the regulating piston 24 divides the outer cylinder body 12 into an upper oil chamber 10 of the outer cylinder and a lower oil chamber 28 of the outer cylinder; A first oil circulation channel 9 is opened in the oil chamber 8, and a second oil circulation channel 29 is opened between the lower oil chamber 28 of the outer cylinder and the lower oil chamber 22 of the inner cylinder, thereby realizing the upper oil chamber 8 of the inner cylinder and the upper oil chamber of the outer cylinder. 10. And the oil circulation between the lower oil chamber 22 of the inner cylinder and the lower oil chamber 28 of the outer cylinder; a regulating channel 23 is opened between the upper oil chamber 10 of the outer cylinder and the lower oil chamber 22 of the inner cylinder, and the regulating piston 24 circulates with the oil Then move up and down to change the size of the adjustment channel 23, so that the cross-sectional area of the oil flow in the adjustment channel 23 can be adjusted in real time according to different road conditions, so as to meet multiple needs and improve the shock absorption effect of the shock absorber; An adjustment spring 26 is provided, one end of which is connected to the bottom end of the adjustment piston 24 through the adjustment piston spring buckle 25, and the other end is connected to the lower end cover 30 of the shock absorber through the adjustment spring connection buckle 27, so that the adjustment piston 24 moves up and down along the outer cylinder. During the process, it has a buffering effect with the lower end cover 30 of the shock absorber, and plays a protective role.

Among them, as shown in FIGS. 2 to 5 , the regulating piston 24 includes a first steel ring 32 and a second steel ring 33 , and the first steel ring 32 and the second steel ring 33 are connected by a connecting ring 34 ; There are a plurality of first through grooves 35 corresponding to the adjustment channel 23 , and the first through grooves 35 penetrate the connecting ring 34 in the radial direction; The groove 36 and the second through groove 36 penetrate the first steel ring 32 in the axial direction; when the first steel ring 32 overlaps with the adjustment channel 23 , the adjustment channel 23 is closed; at the same time, when the adjustment piston 24 moves upward, the first through groove 35 communicates Adjust the channel 23, and then realize the oil circulation between the lower oil chamber 22 of the inner cylinder and the upper oil chamber 10 of the outer cylinder; when the regulating piston 24 moves down, it communicates with the upper oil chamber 8 of the inner cylinder and the upper oil chamber 10 of the outer cylinder, thereby realizing the oil flow. circulation.

In this embodiment, when the adjusting spring 26 is in a natural relaxation state, the adjusting piston 24 is in a balanced position, and at this time, the first steel ring 32 of the adjusting piston 24 closes the adjusting passage 23 .

Specifically, the oil storage cylinder is placed inside the piston rod 13; it includes an oil and gas separation piston 15, and the oil and gas separation piston 15 divides the oil storage cylinder into a gas cylinder 14 and an oil liquid cylinder 16, and a piston end cover 18 is installed at the end of the oil storage cylinder; the piston The end cover 18 is provided with a compensation valve 21 and a compression valve 17. The compensation valve 21 is a pressure valve that conducts the oil from the oil cylinder 16 to the lower oil chamber 22 of the inner cylinder. The pressure valve with one-way conduction of oil in the cylinder 16 adjusts the pressure difference generated during the oil circulation of the inner cylinder and the outer cylinder through the compensation valve 21 and the compression valve 17, which effectively expands the range of shock absorption and improves the shock absorption effect; the piston The end cover 18 penetrates the oil storage cylinder and connects the piston rod 13 through the connecting bolt 19, which is used to guide the up and down movement of the oil and gas separating piston 15; a rubber gasket 20 is provided between the connecting bolt 19 and the piston end cover 18, which plays a sealing role .

In this embodiment, in the initial state, the compression valve 17 and the compensation valve 21 are closed.

In this embodiment, the upper ends of the outer walls of the inner cylinder 11 and the outer cylinder 12 are respectively welded with the upper end cover 1 of the shock absorber; the lower ends of the outer walls of the inner cylinder 11 and the outer cylinder 12 are respectively welded with the lower end cover 30 of the shock absorber, Realize the protection of the inner and outer cylinders of the shock absorber.

In this embodiment, an upper lifting lug 6 is provided at the end of the piston rod 13 in contact with the external environment, a spring seat 5 is arranged between the upper lifting lug 6 and the piston rod 13 , and the bottom of the upper lifting lug 6 passes through the spring seat 5 and is threaded with the piston rod 13 Matching; the connection between the piston rod 13 and the upper end cover 1 of the shock absorber is sealed by the sealing assembly 3 to prevent air from entering.

Specifically, it also includes a shock absorber spring 7, one end of which is connected to the spring seat 5 through the first shock absorber spring connection buckle 4; the other end of which is connected to the upper end cover of the shock absorber through the second shock absorber spring connection buckle 2 1, so that the piston rod 13 acts as a buffer during the movement process, and at the same time provides an upward spring force for the piston rod 13.

In this embodiment, the lower lifting lugs 31 are welded on the lower end cover 30 of the shock absorber.

In this embodiment, the upper oil chamber 8 of the inner cylinder, the lower oil chamber 22 of the inner cylinder, the upper oil chamber 10 of the outer cylinder, the lower oil chamber 28 of the outer cylinder, and the oil cylinder 16 are filled with oil, and the gas cylinder 14 is filled with low pressure Nitrogen is used to eliminate foaming of shock absorber fluid and reduce driving noise.

A method of using the above-mentioned dual-cylinder vehicle shock absorber, comprising the following steps:

S1: When the road surface condition is a convex road surface during the driving process of the vehicle, the load on the shock absorber increases, the piston rod 13 is pressed down and extends into the shock absorber, and the adjustment piston 24 moves up to make the adjustment channel 23 conduct, and the inner cylinder Oil exchange is performed between the lower oil chamber 22 and the upper oil chamber 10 of the outer cylinder through the adjustment channel 23;

S2: When the road surface condition is a concave road surface during the driving process of the vehicle, the load on the shock absorber is reduced, the piston rod 13 is moved up and out of the shock absorber by the spring, the adjusting piston 24 moves down to make the adjusting channel 23 conduct, and the inner cylinder Oil exchange is performed between the lower oil chamber 22 and the upper oil chamber 10 of the outer cylinder through the adjustment channel 23 .

Specifically, how it works includes:

In the initial state, that is, when the vehicle is running smoothly, the oil pressure in the upper oil chamber 8 of the inner cylinder, the lower oil chamber 22 of the inner cylinder, the upper oil chamber 10 of the outer cylinder, the lower oil chamber 28 of the outer cylinder, and the oil cylinder 16 are equal, and the oil pressure in the outer cylinder is equal. The adjusting spring 26 is in a natural relaxed state, at this time, the adjusting piston 24 is in a balanced position, and the first steel ring 32 of the adjusting piston 24 just completely blocks the adjusting passage 23; the compression valve 17 and the compensation valve 21 are both in the closed state.

When the vehicle encounters a raised road surface during driving, the vehicle shock absorber is subjected to an increased load. At this time, the piston rod 13 is pressed down by force, and the shock absorber spring 7 outside the shock absorber is compressed accordingly; inside the shock absorber, the piston rod 13 enters the inner cylinder inward, and the volume in the inner cylinder decreases, so that the inner cylinder The oil pressure of the upper oil chamber 8 decreases and the oil pressure of the lower oil chamber 22 of the inner cylinder increases. At this time, the oil pressure of the upper oil chamber 8 of the inner cylinder is lower than the oil pressure of the lower oil chamber 22 of the inner cylinder and the oil of the upper oil chamber 8 of the inner cylinder. The pressure is lower than the oil pressure of the upper oil chamber 10 of the outer cylinder, the oil pressure of the lower oil chamber 22 of the inner cylinder is greater than the oil pressure of the lower oil chamber 28 of the outer cylinder; the oil of the upper oil chamber 10 of the outer cylinder flows into the first oil circulation channel 9 The upper oil chamber 8 of the inner cylinder reduces the oil pressure in the upper oil chamber 10 of the outer cylinder; the oil in the lower oil chamber 22 of the inner cylinder flows into the lower oil chamber 28 of the outer cylinder through the second oil flow passage 29, so that the lower oil chamber of the outer cylinder flows into the lower oil chamber 28 of the outer cylinder The oil pressure of 28 increases; at this time, the oil pressure of the upper oil chamber 10 of the outer cylinder is lower than the oil pressure of the lower oil chamber 28 of the outer cylinder. Under the pressure difference between the upper oil chamber 10 of the outer cylinder and the lower oil chamber 28 of the outer cylinder, the The regulating piston 24 in the outer cylinder moves up, the regulating spring 26 in the lower oil chamber 28 of the outer cylinder stretches, and the first through groove 35 on the regulating piston 24 communicates with the regulating passage 23, which in turn communicates with the lower oil chamber 22 of the inner cylinder and the outer cylinder 23. The upper oil chamber 10 of the cylinder makes the adjustment passage 23 open upward, and the greater the pressure difference, the greater the opening degree of the adjustment passage 23, the oil in the lower oil chamber 22 of the inner cylinder flows into the upper oil chamber 10 of the outer cylinder through the adjustment passage 23, Further, the oil flows into the upper oil chamber 8 of the inner cylinder through the first oil circulation channel 9, and the oil is exchanged by increasing the adjustment channel 23, which further consumes the vibration energy; at the same time, when the piston rod 13 enters more into the inner cylinder, the inner cylinder The oil pressure in the lower oil chamber 22 is greater than the oil pressure of the oil cylinder 16, the compression valve 17 on the piston end cover 18 is opened, and the oil in the lower oil chamber 22 of the inner cylinder flows into the oil cylinder 16 through the compression valve 17, and the oil and gas are separated. The piston 15 moves up and the gas cylinder 14 is compressed.

When the vehicle encounters a concave road surface during driving, the load on the vehicle shock absorber is reduced. At this time, the shock absorber spring 7 outside the shock absorber generates a spring force, and the piston rod 13 is moved upward by the spring; inside the shock absorber, the piston rod 13 extends out of the inner cylinder, and the volume in the inner cylinder increases, The oil pressure in the upper oil chamber 8 of the inner cylinder is increased, and the oil pressure in the lower oil chamber 22 of the inner cylinder is reduced. The oil pressure of 8 is greater than the oil pressure of the upper oil chamber 10 of the outer cylinder, the oil pressure of the lower oil chamber 22 of the inner cylinder is less than the oil pressure of the lower oil chamber 28 of the outer cylinder; the oil in the upper oil chamber 8 of the inner cylinder circulates through the first oil The passage 9 flows into the upper oil chamber 10 of the outer cylinder, so that the oil pressure of the upper oil chamber 10 of the outer cylinder increases; the oil in the lower oil chamber 28 of the outer cylinder flows into the lower oil chamber 22 of the inner cylinder through the second oil circulation passage 29, so that the outer cylinder The oil pressure in the lower oil chamber 28 of the cylinder decreases; at this time, the oil pressure in the upper oil chamber 10 of the outer cylinder is greater than the oil pressure in the lower oil chamber 28 of the outer cylinder, and the pressure between the upper oil chamber 10 of the outer cylinder and the lower oil chamber 28 of the outer cylinder The difference makes the regulating piston 24 in the outer cylinder move down, the regulating spring 26 in the lower oil chamber 28 of the outer cylinder is compressed, the lower oil chamber 22 of the inner cylinder is directly communicated with the upper oil chamber 10 of the outer cylinder, and the regulating passage 23 is opened downwards. And the greater the pressure difference, the greater the opening degree of the adjustment passage 23, the oil in the upper oil chamber 8 of the inner cylinder flows into the upper oil chamber 10 of the outer cylinder through the first oil flow passage 9, and then flows into the lower oil chamber of the inner cylinder through the adjustment passage 23 In the oil chamber 22, the oil is exchanged by adding the adjustment channel 23, which further consumes the vibration energy; at the same time, when the piston rod 13 extends outwards into the inner cylinder, the oil pressure in the lower oil chamber 22 of the inner cylinder is lower than that of the oil cylinder. 16, the compensation valve 21 on the piston end cover 18 is opened, the oil in the oil cylinder 16 flows into the lower oil chamber 22 of the inner cylinder through the compensation valve 21, the oil and gas separation piston 15 moves down, and the gas cylinder 14 is released.

The above descriptions are only the embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied to other related technologies Fields are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A two-cylinder vehicle shock absorber, characterized in that, comprising: An inner cylinder, comprising a piston rod (13) and an inner cylinder (11), the piston rod (13) penetrating the top of the inner cylinder (11) and in contact with the side wall of the inner cylinder (11) , dividing the inner cylinder body (11) into an inner cylinder upper oil chamber (8) and an inner cylinder lower oil chamber (22); The outer cylinder includes a regulating piston (24) and an outer cylinder body (12), and the regulating piston (24) divides the outer cylinder body (12) into an outer cylinder upper oil chamber (10) and an outer cylinder lower oil chamber (10). 28); the upper oil chamber (10) of the outer cylinder and the upper oil chamber (8) of the inner cylinder are provided with a first oil circulation channel (9), the lower oil chamber (28) of the outer cylinder and the inner cylinder A second oil circulation channel (29) is set between the lower oil chambers (22); an adjustment channel (23) is set between the upper oil chamber (10) of the outer cylinder and the lower oil chamber (22) of the inner cylinder, so The regulating piston (24) moves up and down along with the oil flow to adjust the size of the regulating channel (23). 2. A double-cylinder vehicle shock absorber according to claim 1, characterized in that: it further comprises an oil storage cylinder, which is placed inside the piston rod (13); A piston (15) divides the oil storage cylinder into a gas cylinder (14) and an oil liquid cylinder (16), and a piston end cover (18) is installed at the end of the oil storage cylinder; the piston end cover (18) is provided with A compensation valve (21) and a compression valve (17), the compensation valve (21) is a pressure valve that conducts the oil from the oil cylinder (16) to the lower oil chamber (22) of the inner cylinder in one way. The compression valve (17) is a pressure valve for unidirectionally conducting oil from the lower oil chamber (22) of the inner cylinder to the oil in the oil cylinder (16). 3. A double-cylinder vehicle shock absorber according to claim 2, characterized in that: the piston end cover (18) penetrates the oil storage cylinder through a connecting bolt (19) and is connected to the piston rod (13) , which is used to guide the up and down movement of the oil and gas separation piston (15). 4. A double-cylinder vehicle shock absorber according to claim 3, characterized in that: a rubber gasket (20) is provided between the connecting bolt (19) and the piston end cover (18), which is used for to seal. 5. A double-cylinder vehicle shock absorber according to claim 1, characterized in that: the adjusting piston (24) comprises a first steel ring (32) and a second steel ring (33), the first steel ring (33) The steel ring (32) and the second steel ring (33) are connected through a connection ring (34); the connection ring (34) is provided with a plurality of first passages corresponding to the adjustment passages (23). a groove (35), the first through groove (35) penetrates the connecting ring (34) in the radial direction; the first steel ring (32) is provided with a plurality of 35) A communicating second through groove (36), the second through groove (36) passing through the first steel ring (32) in the axial direction; the first steel ring (32) and the adjustment channel (23) When overlapping, the regulating channel (23) is closed. 6. A double-cylinder vehicle shock absorber according to claim 1, characterized in that: the upper ends of the outer walls of the inner cylinder body (11) and the outer cylinder body (12) are respectively connected with the upper end cover of the shock absorber (12). 1) Welding; the lower ends of the outer walls of the inner cylinder body (11) and the outer cylinder body (12) are respectively welded with the lower end cover (30) of the shock absorber. 7 . The double-cylinder vehicle shock absorber according to claim 6 , wherein an adjusting spring ( 26 ) is arranged in the lower oil chamber ( 28 ) of the outer cylinder, one end of which is snapped by the adjusting piston spring ( 25 ). 8 . ) is connected to the bottom end of the adjusting piston (24), and the other end is connected to the lower end cover (30) of the shock absorber through the adjusting spring connecting buckle (27). 8. A double-cylinder vehicle shock absorber according to claim 1, characterized in that: an end of the piston rod (13) in contact with the external environment is provided with an upper lifting lug (6), and the upper lifting lug (6) is connected to the A spring seat (5) is arranged between the piston rods (13), and the bottom of the upper lifting lug (6) passes through the spring seat (5) and is threadedly matched with the piston rod (13). 9. A double-cylinder vehicle shock absorber according to claim 6, characterized in that it further comprises a shock absorber spring (7), one end of which is connected to the said shock absorber spring through a first shock absorber spring connection buckle (4). A spring seat (5); the other end thereof is connected to the upper end cover (1) of the shock absorber through the second shock absorber spring connection buckle (2). 10. A method of using a double-cylinder vehicle shock absorber according to claim 1, characterized in that, comprising the steps of: S1: When the road surface condition is a convex road surface during the driving process of the vehicle, the load on the shock absorber increases, the piston rod (13) is pressed down and extends into the shock absorber, and the adjustment piston (24) moves up to make the adjustment channel (23) ) is turned on, and the oil is exchanged between the lower oil chamber (22) of the inner cylinder and the upper oil chamber (10) of the outer cylinder through the adjustment channel (23); S2: When the road surface condition is a concave road surface during the driving process of the vehicle, the load on the shock absorber is reduced, the piston rod (13) is moved up and out of the shock absorber under the action of the spring, and the adjusting piston (24) moves down to make the adjusting channel (23) ) is turned on, and the oil exchange is performed between the lower oil chamber (22) of the inner cylinder and the upper oil chamber (10) of the outer cylinder through the adjusting channel (23).

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