A height-adjustable magnetorheological independent suspension for an engineering vehicle

Abstract

The application discloses a highly adjustable engineering vehicle magnetorheological independent suspension, which comprises a magnetorheological fluid cylinder, a piston assembly, a piston rod, turbine blades, a first-stage height-adjusting hydraulic cylinder, a second-stage height-adjusting hydraulic cylinder, a one-way valve and a protective cover; the piston assembly and the piston rod are located in the magnetorheological fluid cylinder, the piston assembly is wound with an excitation coil, and a ball is arranged in the damping gap on the upper and lower sides of the excitation coil, so that the magnetic permeability in the damping gap is increased, the magnetic field intensity is strengthened, and the controllable damping force of the suspension is improved; meanwhile, the screw rod is matched with the turbine blades, and the relative linear motion between the piston assembly and the magnetorheological fluid cylinder is converted into the rotary motion of the turbine blades, so that the flow of the magnetorheological fluid in the cylinder is promoted, the iron particles are prevented from settling for a long time, and the performance of the magnetorheological fluid is influenced.

Description

Technical Field

[0001] This invention relates to a magnetorheological independent suspension for engineering vehicles, specifically a height-adjustable magnetorheological independent suspension for engineering vehicles, belonging to the field of engineering vehicle suspension technology. Background Technology

[0002] Generally speaking, the independent suspension system of engineering vehicles is a key component in the design of modern engineering machinery. Its design and development are directly related to the overall performance, operational stability, driving comfort, and safety of the engineering vehicles. Specifically, the independent suspension system allows each wheel to be independently connected to the vehicle body and respond independently to road unevenness, thereby greatly improving the adaptability and passability of engineering vehicles in complex terrain and harsh working conditions.

[0003] With the continuous development of engineering construction and the acceleration of technological innovation, engineering vehicles face increasingly complex and varied working environments, such as mines, construction sites, and forests. In these environments, uneven road surfaces, large load variations, and frequent operation place higher demands on vehicle suspension systems. Independent suspension systems, due to their unique structural design and functional characteristics, have become a key technology for solving these problems.

[0004] In the current technology, independent suspension systems are widely used in passenger cars, light commercial vehicles, and some special vehicles, but their application in the field of engineering vehicles is still in the development stage. Due to the working environment and load characteristics of engineering vehicles, their independent suspension systems need to have higher strength, better durability, and more flexible adjustability. Currently, research on independent suspension systems for engineering vehicles not only has important theoretical value but also has broad practical application prospects. Summary of the Invention

[0005] To address the technological gap in existing independent suspension systems for engineering vehicles, this invention proposes a height-adjustable magnetorheological independent suspension for engineering vehicles. This magnetorheological independent suspension for engineering vehicles features high output controllable damping force, a compact overall structure, and a large height adjustment range.

[0006] The present invention achieves the above objectives through the following technical solution: a height-adjustable magnetorheological independent suspension for engineering vehicles, comprising a magnetorheological fluid cylinder and a heat dissipation inner cylinder located inside the magnetorheological fluid cylinder;

[0007] The end of the magnetorheological fluid cylinder is connected to the end cap by screw I;

[0008] A piston assembly is installed inside the cooling cylinder. One end of the piston assembly is connected to a piston rod, and the other end of the piston assembly is connected to one end of a screw.

[0009] The other end of the screw rod is sequentially connected with turbine blades and a bearing, and the screw rod is connected with the turbine blades in an interference fit mode, and the turbine blades are fixed on the screw rod through a nut;

[0010] The heat dissipation inner cylinder is provided with a gasket at one end, and the gasket is in contact with the outer ring of the bearing;

[0011] The magneto-rheological fluid cylinder is sleeved in the two-stage height adjustment hydraulic cylinder, and a sealing ring III is arranged at the other end of the magneto-rheological fluid cylinder;

[0012] The two-stage height adjustment hydraulic cylinder is connected with the cover plate I through a screw II;

[0013] The two-stage height adjustment hydraulic cylinder is provided with a one-way valve assembly;

[0014] The two-stage height adjustment hydraulic cylinder is sleeved in the one-stage height adjustment hydraulic cylinder, and a sealing ring IV is arranged at the end of the two-stage height adjustment hydraulic cylinder;

[0015] The one-stage height adjustment hydraulic cylinder is connected with the cover plate II through a screw III;

[0016] The joint support I and the joint support II for mounting the oil pipe joint are fixedly installed on the outer sides of the one-stage height adjustment hydraulic cylinder and the two-stage height adjustment hydraulic cylinder respectively;

[0017] The outer side of the one-stage height adjustment hydraulic cylinder is fixedly provided with a protective cover II, and the outer side of the two-stage height adjustment hydraulic cylinder is fixedly provided with a protective cover I.

[0018] As a further technical solution of the present application: the piston assembly comprises a piston body, a cover I, a cover II, an excitation coil, a ball and a screw IV;

[0019] The piston body, the cover I and the cover II are connected through the screw IV, the cover I is provided with a ball circulating rolling channel, the ball is arranged in the ball circulating rolling channel and is in contact with the inner wall of the heat dissipation inner cylinder.

[0020] As a further technical solution of the present application: the one-way valve assembly comprises a sleeve, an extension rod, a spring and a pressing plate;

[0021] The sleeve is provided with the pressing plate at the end, the sleeve is provided with the extension rod, the extension rod is provided with the spring, and the extension rod is in contact with the pressing plate.

[0022] As a further technical solution of the present application: the heat dissipation inner cylinder is provided with a double helix water circulating channel.

[0023] As a further technical solution of the present application: the magneto-rheological fluid cylinder, the two-stage height adjustment hydraulic cylinder and the one-stage height adjustment hydraulic cylinder form a two-stage height adjustment structure.

[0024] As a further technical scheme of the present application: two reverse one-way valve assemblies for opening the hydraulic oil flow in the two cylinder barrels are arranged between the secondary height-adjusting hydraulic cylinder barrel and the primary height-adjusting hydraulic cylinder barrel.

[0025] As a further technical scheme of the present application: the protective cover I and the protective cover II are provided with notches, and the notches cooperate with the joint support I and the joint support II.

[0026] As a further technical scheme of the present application: the end cover is provided with a sealing ring I and a sealing ring II.

[0027] As a further technical scheme of the present application: the piston assembly and the piston rod are connected through threads.

[0028] The beneficial effects of the present application are:

[0029] 1) By arranging the balls on the piston, the magnetic permeability in the damping gap is increased, the magnetic field strength of the damping gap is enhanced, and the controllable output damping force of the independent suspension is improved;

[0030] 2) The two-stage height-adjusting mode is composed of the magnetorheological fluid cylinder barrel and the two hydraulic cylinder barrels, which can reduce the volume of the independent suspension and increase the adjustable range of the height;

[0031] 3) The turbine blade anti-settling device is provided, and the protective cover is arranged to prevent the cylinder barrel from being knocked and worn by the external environment during the driving of the vehicle on the bad road, and to inhibit the relative rotation between the cylinder barrels, so as to ensure the normal operation of the anti-settling device. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a schematic diagram of the overall structure of the present application;

[0033] Figure 2 is a schematic diagram of the piston assembly structure in the present application;

[0034] Figure 3 is a schematic diagram of the height-adjusting oil way interface in the present application;

[0035] Figure 4 is a schematic diagram of the heat dissipation inner cylinder barrel structure in the present application;

[0036] Figure 5 is a schematic diagram of the one-way valve assembly structure in the present application;

[0037] In the diagram: 1. Magnetorheological fluid cylinder barrel, 2. Heat dissipation inner cylinder barrel, 3. End cap, 4. Piston assembly, 5. Piston rod, 6. Screw, 7. Turbine blade, 8. Gasket, 9. Bearing, 10. Nut, 11. Seal ring I, 12. Seal ring II, 13. Secondary height adjustment hydraulic cylinder barrel, 14. Cover plate I, 15. One-way valve assembly, 16. Seal ring III, 17. Primary height adjustment hydraulic cylinder barrel, 18. Cover plate II, 19. Seal ring IV, 20. Oil pipe joint, 21. Joint support I, 22. Joint support I, 23. Protective cover I, 24. Protective cover II, 25. Screw I, 26. Screw II, 27. Screw III;

[0038] 401. Plug body; 402. Cover I; 403. Cover II; 404. Excitation coil; 405. Ball bearing; 406. Screw IV;

[0039] 1501, Sleeve; 1502, Telescopic Rod; 1503, Spring; 1504, Pressure Plate;

[0040] a) First oil port, b) Second oil port, c) Third oil port. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0042] Example 1, as Figure 1 As shown, this embodiment provides a height-adjustable magnetorheological independent suspension for engineering vehicles. The magnetorheological independent suspension for engineering vehicles includes a magnetorheological fluid cylinder 1 and a heat dissipation inner cylinder 2 installed inside the magnetorheological fluid cylinder 1.

[0043] The right ends of the magnetorheological fluid cylinder 1 and the heat dissipation inner cylinder 2 are flush, and the right end of the magnetorheological fluid cylinder 1 is connected to the end cap 3 by screw I25. The end cap 3 is provided with sealing ring I11 and sealing ring II12.

[0044] A piston assembly 4 is horizontally arranged in the cavity inside the heat dissipation inner cylinder 2. The piston rod 5 is threadedly connected to the right end of the piston assembly 4, and one end of the screw 6 is connected to the left end of the piston assembly 4.

[0045] The other end of the screw 6 is connected to the worm gear blade 7 and the bearing 9 from right to left. It should be noted that the screw 6 and the worm gear blade 7 are interference fit, and the worm gear blade 7 is fixedly connected to the screw 6 by the nut 10.

[0046] A gasket 8 is installed on the left side of the heat-dissipation inner cylinder 2, and the gasket 8 is in contact with the outer ring of the bearing 9;

[0047] The magnetorheological fluid cylinder 1 is sleeved in the two-stage height-adjusting hydraulic cylinder 13, and a sealing ring III 16 is installed on the left end of the magnetorheological fluid cylinder 1. The left end of the two-stage height-adjusting hydraulic cylinder 13 is connected with the cover plate I 14 through the screw II 26;

[0048] A pair of one-way valve assemblies 15 are installed in the two-stage height-adjusting hydraulic cylinder 13;

[0049] The two-stage height-adjusting hydraulic cylinder 13 is sleeved in the one-stage height-adjusting hydraulic cylinder 17, and a sealing ring IV 19 is installed on the left end of the two-stage height-adjusting hydraulic cylinder 13;

[0050] The one-stage height-adjusting hydraulic cylinder 17 is fixedly connected with the cover plate II 18 through the screw III 27;

[0051] The one-stage height-adjusting hydraulic cylinder 17 is fixedly provided with a joint support I 21 for installing an oil pipe joint 20 on the outer side, and the two-stage height-adjusting hydraulic cylinder 13 is fixedly provided with a joint support II 22 for installing an oil pipe joint 20 on the outer side, so as to prevent relative rotation between the cylinders and ensure normal work of the turbine blade 7;

[0052] A protective cover II 24 is installed on the outer side of the one-stage height-adjusting hydraulic cylinder 17, and a protective cover I 23 is fixedly installed on the outer side of the two-stage height-adjusting hydraulic cylinder 13, which can prevent the cylinder from being bumped and worn by the external environment during the driving of the vehicle on a bad road.

[0053] In the second embodiment, in addition to all the technical features in the first embodiment, the second embodiment further comprises: Figure 2 As shown in the figure, the piston assembly 4 comprises a piston body 401, a cover I 402, a cover II 403, an excitation coil 404, a ball 405 and a screw IV 406;

[0054] The piston body 401, the cover I 402 and the cover II 403 are connected through the screw IV 406, the ball circulating rolling channel is arranged in the cover I 402, the ball 405 is arranged in the ball circulating rolling channel, and the ball 405 is in contact with the inner wall of the heat-dissipation inner cylinder 2;

[0055] As shown in the figure, Figure 1 and Figure 2 It can be seen that there is a damping gap between the piston assembly 4 and the heat-dissipation inner cylinder 2. Since the excitation coil is wound on the piston assembly 4, the ball 405 is arranged in the damping gap on the upper and lower sides of the excitation coil (the ball is also located in the ball circulating rolling channel), and the ball 404 circulates in the piston assembly, which can increase the magnetic permeability in the damping gap, enhance the magnetic field strength of the damping gap, and improve the controllable output damping force of the independent suspension.

[0056] Embodiment three, in addition to including all the technical features in embodiment one, further includes, as shown in the figure, a pair of one-way valve assemblies 15 are arranged at the left end of the second-stage height-adjusting hydraulic cylinder barrel 13; the pair of one-way valve assemblies 15 are arranged between the second-stage height-adjusting hydraulic cylinder barrel 13 and the first-stage height-adjusting hydraulic cylinder barrel 17 and are reversed, for opening the flow of hydraulic oil in the two cylinder barrels; Figure 5

[0057] The one-way valve assembly 15 includes a sleeve 1501, an extension rod 1502, a spring 1503 and a pressing plate 1504, the sleeve 1501 is symmetrically provided with the pressing plate 1504 at the end, the extension rod 1502 is installed in the sleeve 1501, the spring 1503 is installed on the extension rod 1502, and the extension rod 1502 is in contact with the pressing plate 1504.

[0058] Embodiment four, in addition to including all the technical features in embodiment one, further includes: as shown in the figure, the heat-dissipation inner cylinder barrel 2 is provided with a double-helix water circulation channel, and the double-helix water circulation channel can reduce the heat generated by the rolling friction between the ball 405 and the inner wall of the heat-dissipation inner cylinder barrel 2 when the magnetorheological fluid works. Figure 4

[0059] Since the worm gear blade 7 is connected to the left end of the screw rod 6 and is located at the left end of the magnetorheological fluid cylinder barrel 1, when the piston assembly 4 moves, a helical pair is formed between the screw rod 6 and the piston assembly 4 (the relative linear motion of the piston assembly 4 and the magnetorheological fluid cylinder barrel 1 is converted into the rotary motion of the worm gear blade 6), which drives the worm gear blade 7 to rotate, promotes the flow of the magnetorheological fluid below the piston assembly 4 of the magnetorheological fluid cylinder barrel, prevents the iron particles in the magnetorheological fluid from settling for a long time, and affects the performance of the magnetorheological fluid.

[0060] The magnetorheological fluid cylinder barrel 1, the second-stage height-adjusting hydraulic cylinder barrel 13 and the first-stage height-adjusting hydraulic cylinder barrel 17 form a two-stage height-adjusting mode (two-stage height-adjusting structure), which can reduce the volume of the independent suspension and increase the adjustable range of the height.

[0061] The protection cover I 23 and the protection cover II 24 are provided with notches on the side surfaces, and the notches cooperate with the joint supports I 21 and the joint supports II 22 to prevent the relative rotation between the cylinder barrels and ensure that the worm gear blade 7 can work normally.

[0062] ​​Working process: The piston rod 5 is fixed to the frame, and the first-stage height adjustment hydraulic cylinder 17 is fixed to the tire assembly. With road excitation, the piston assembly 4 and the piston rod 5 reciprocate axially relative to the magnetorheological fluid cylinder 1 and the cooling inner cylinder 2. The excitation coil 404 in the piston assembly 4 generates a corresponding magnetic field according to the input current. The magnetic lines of force form a closed loop through the cover I 402, cover II 403, ball 405, and cooling inner cylinder 2. The viscosity of the magnetorheological fluid in the damping gap between the piston assembly 4 and the cooling inner cylinder 2 changes under the action of the magnetic field, thereby outputting a corresponding damping force to absorb the vibration transmitted from the tire to the frame. At the same time, the piston body 401 in the piston assembly 4 and the screw 6 convert the axial reciprocating motion into rotational motion through the screw pair. The turbine blades 7 fixed on the screw 6 rotate, promoting the flow of the magnetorheological fluid.

[0063] The independent suspension of this invention includes a two-stage height adjustment mode, mainly composed of a magnetorheological fluid cylinder 1, a secondary height adjustment hydraulic cylinder 13, and a primary height adjustment hydraulic cylinder 17; as shown... Figure 3 As shown, the magnetorheological fluid cylinder 1, the secondary height-adjusting hydraulic cylinder 13, and the primary height-adjusting hydraulic cylinder 17 each have a third oil port c, a second oil port b, and a first oil port a, respectively. When hydraulic oil is introduced into the first oil port a, the magnetorheological fluid cylinder 1 and the secondary height-adjusting hydraulic cylinder 13 rise simultaneously. When the secondary height-adjusting hydraulic cylinder 13 reaches its upper limit, the oil pressure continues to rise, the check valve opens, and the magnetorheological fluid cylinder 1 continues to rise. When hydraulic oil is introduced into the second oil port b, the magnetorheological fluid cylinder 1 and the secondary height-adjusting hydraulic cylinder 13 descend simultaneously. When the secondary height-adjusting hydraulic cylinder 13 reaches its lower limit, hydraulic oil is introduced into the third oil port c, the check valve on the other side opens, and the magnetorheological fluid cylinder 1 continues to descend, thereby achieving suspension height adjustment.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0065] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A height adjustable magnetorheological independent suspension for an engineering vehicle, characterized by: Magnetorheological fluid cylinder (1) and heat dissipation inner cylinder (2) located inside the magnetorheological fluid cylinder (1); The end of the magnetorheological fluid cylinder (1) is connected with the end cover (3) through screw I (25); The piston assembly (4) is installed in the heat dissipation inner cylinder (2), one end of the piston assembly (4) is connected with the piston rod (5), and the other end of the piston assembly (4) is connected with one end of the screw rod (6); The other end of the screw rod (6) is connected with the turbine blade (7) and the bearing (9) in sequence, and the screw rod (6) is connected with the turbine blade (7) in an interference fit, the turbine blade (7) is fixed on the screw rod (6) through the nut (10); One end of the heat dissipation inner cylinder (2) is provided with a gasket (8), and the gasket (8) is in contact with the outer ring of the bearing (9); The magnetorheological fluid cylinder (1) is sleeved in the two-stage height adjustment hydraulic cylinder (13), and a sealing ring III (16) is arranged at the other end of the magnetorheological fluid cylinder (1); The two-stage height adjustment hydraulic cylinder (13) is connected with the cover plate I (14) through the screw II (26); The two-stage height adjustment hydraulic cylinder (13) is provided with a one-way valve assembly (15); The two-stage height adjustment hydraulic cylinder (13) is sleeved in the one-stage height adjustment hydraulic cylinder (17), and a sealing ring IV (19) is arranged at the end of the two-stage height adjustment hydraulic cylinder (13); The one-stage height adjustment hydraulic cylinder (17) is connected with the cover plate II (18) through the screw III (27); The joint support I (21) and the joint support II (22) for installing the oil pipe joint (20) are fixedly installed on the outer sides of the one-stage height adjustment hydraulic cylinder (17) and the two-stage height adjustment hydraulic cylinder (13) respectively; The outer side of the one-stage height adjustment hydraulic cylinder (17) is fixedly provided with a protective cover II (24), and the outer side of the two-stage height adjustment hydraulic cylinder (13) is fixedly provided with a protective cover I (23); The piston assembly (4) comprises a piston main body (401), a cover I (402), a cover II (403), an excitation coil (404), a ball (405) and a screw IV (406); The piston main body (401), the cover I (402) and the cover II (403) are connected through the screw IV (406), the cover I (402) is provided with a ball circulating rolling channel, and the ball (405) is arranged in the ball circulating rolling channel and in contact with the inner wall of the heat dissipation inner cylinder (2).

2. The engineered vehicle magneto-rheological independent suspension of claim 1, wherein: The one-way valve assembly (15) comprises a sleeve (1501), a telescopic rod (1502), a spring (1503) and a pressing plate (1504); The sleeve (1501) is provided with the pressing plate (1504) at the end, the telescopic rod (1502) is installed in the sleeve (1501), the spring (1503) is installed on the telescopic rod (1502), and the telescopic rod (1502) is in contact with the pressing plate (1504).

3. The engineered vehicle magneto-rheological independent suspension of claim 1, wherein: The heat dissipation inner cylinder (2) is provided with a double helix water circulating channel.

4. The engineered vehicle magneto-rheological independent suspension of claim 1, wherein: The magnetorheological fluid cylinder (1), the second-stage height-adjusting hydraulic cylinder (13) and the first-stage height-adjusting hydraulic cylinder (17) form a two-stage height-adjusting structure.

5. The engineered vehicle magneto-rheological independent suspension of claim 1, wherein: Two reverse one-way valve assemblies (15) for opening the hydraulic oil flow in the two cylinders are arranged between the second-stage height-adjusting hydraulic cylinder (13) and the first-stage height-adjusting hydraulic cylinder (17).

6. The engineered vehicle magneto-rheological independent suspension of claim 1, wherein: The protective cover I (23) and the protective cover II (24) are provided with notches on the sides, and the notches are matched with the joint support I (21) and the joint support II (22).

7. The engineered vehicle magneto-rheological independent suspension of claim 1, wherein: The end cover (3) is provided with a sealing ring I (11) and a sealing ring II (12).

8. The engineered vehicle magneto-rheological independent suspension of claim 1, wherein: The piston assembly (4) and the piston rod (5) are connected through threads.

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