CN111853132A

CN111853132A - Magneto-rheological damper

Info

Publication number: CN111853132A
Application number: CN202010812590.3A
Authority: CN
Inventors: 王祖雷; 代高彬; 陈梁杰; 徐孟杰; 王栋杰
Original assignee: Ningbo Lipinge Machine Industry Co ltd
Current assignee: Ningbo Lipinge Machine Industry Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2020-10-30

Abstract

The invention discloses a magneto-rheological shock absorber, which comprises a lower lifting ring, a valve inside, a first sealing ring, a liquid storage cylinder, a second sealing ring, a heat conducting cylinder, a piston rod dustproof cover, a piston, a floating piston, magnetic fluid and nitrogen, the side wall of the lower hanging ring is fixedly provided with a valve core, a first sealing ring is arranged between the lower hanging ring and the valve core, the upper end of the lower hanging ring is connected with a liquid storage cylinder through threads, a second sealing ring is arranged at the joint of the liquid storage cylinder and the lower hanging ring, the outer side of the liquid storage barrel is fixedly connected with a heat conducting barrel, the upper end of the liquid storage barrel is connected with a piston rod dustproof cover cap through threads, the liquid storage cylinder is connected with a piston in a sliding mode, the liquid storage cylinder is connected with a floating piston in a sliding mode, magnetic fluid is filled in a space between the floating piston and the piston, and nitrogen is filled between the floating piston and the lower hanging ring. The invention has the characteristics of good heat dispersion and stable piston installation.

Description

Magneto-rheological damper

Technical Field

The invention belongs to the technical field of shock absorbers, and particularly relates to a magnetorheological shock absorber.

Background

With the research on intelligent materials in recent years, the intelligent materials are developed rapidly, controllable fluids with excellent material performance are gradually and widely applied in the engineering field, and a novel intelligent material magnetorheological fluid (MRF) is also gradually applied to a shock absorber of an automobile suspension system so as to replace a hydraulic shock absorber on an original passive automobile suspension system. Magnetorheological fluid (MRF) is a functional intelligent material which is formed by adding a certain volume fraction of micro or nano-scale micro magnetic solid particles which are uniformly distributed into an insulating liquid medium, so that when a magnetic field is added outside the liquid, the rheological property of the liquid can be changed from a liquid state to a semi-solid state or from the semi-solid state to the liquid state rapidly. People utilize the controllable characteristic of MRF to control the distribution of magnetic field in the magnetic circuit structure of the shock absorber by inputting the control current to realize stepless adjustable and other intelligent mechanical actions of damping force, and develop a novel Magneto-rheological shock absorber (MRFD) of the automobile suspension system.

In the use process of the existing magnetorheological damper, because the piston and the liquid storage cylinder continuously move relatively to generate friction, more heat is generated, the temperature is increased, but the heat dissipation design is lacked, the service life of the liquid storage cylinder can be shortened, and even leakage occurs. And adopt the nut during piston installation, in the vibrations environment, the nut can produce loosely tightly with the connecting axle of installation piston, probably leads to the piston not hard up or even drop, needs dismantle the bumper shock absorber when leading to overhauing, leads to overhauing inconveniently.

The invention content is as follows:

the present invention is directed to solving the above problems by providing a magnetorheological damper that solves the problems noted in the background.

In order to solve the above problems, the present invention provides a technical solution:

the magnetorheological shock absorber comprises a lower hanging ring, a valve inside, a first sealing ring, a liquid storage cylinder, a second sealing ring, a heat conducting cylinder, a piston rod dustproof cover cap, a piston, a floating piston, magnetic flow liquid and nitrogen, wherein the valve inside is fixedly installed on the side wall of the lower hanging ring, the first sealing ring is installed between the lower hanging ring and the valve inside, the upper end of the lower hanging ring is connected with the liquid storage cylinder through threads, the second sealing ring is installed at the joint of the liquid storage cylinder and the lower hanging ring, the heat conducting cylinder is fixedly connected to the outer side of the liquid storage cylinder, the piston rod dustproof cover cap is connected to the upper end of the liquid storage cylinder through threads, the piston is connected in the liquid storage cylinder in a sliding mode, the floating piston is connected in the liquid storage cylinder in a sliding mode, the magnetic flow liquid is filled in a space between.

As preferred, the inside fixedly connected with cooling tube of a heat conduction section of thick bamboo, the cooling tube runs through a heat conduction section of thick bamboo, the heat conduction section of thick bamboo intussuseption is filled with heat conduction silica gel, the lateral wall of a heat conduction section of thick bamboo is provided with the rubber tube, there is sealed lid with the end of rubber tube through threaded connection, the outside fixedly connected with fin of a heat conduction section of thick bamboo, the quantity of fin is a plurality of, and is a plurality of the fin is evenly distributed in the outside of a heat conduction section.

Preferably, a dustproof oil seal is fixedly mounted on the inner side of the dustproof cover of the piston rod, a piston rod is slidably connected to the inner side of the dustproof oil seal, a guider is slidably connected to the outer side of the piston rod, the guider is fixedly mounted in the liquid storage cylinder, a fourth sealing ring and a fifth sealing ring are mounted between the liquid storage cylinder and the guider, an oil seal rubber sleeve is mounted in the guider and is slidably connected with the piston rod, an oil seal check ring is fixedly mounted in the guider and is slidably connected with the piston rod, a sixth sealing ring is mounted at the bottom of the oil seal check ring, an inner buffer block is mounted at the bottom of the guider and is in contact with the sixth sealing ring.

Preferably, damping holes are formed in the upper end and the lower end of the piston, an electromagnetic coil is installed on the outer side of the piston, a connecting shaft is installed in the piston, a square block is fixedly connected to the outer side of the connecting shaft, a baffle ring is fixedly connected to the outer side of the connecting shaft and is in contact with the piston, a piston rod is fixedly connected to the upper end of the connecting shaft, a gasket is sleeved on the outer side of the connecting shaft and is located at the lower end of the piston, a nut is connected to the bottom of the connecting shaft through threads, the nut is in contact with the gasket, an elastic sheet is fixedly connected to the surface of the nut, a clamping block is fixedly connected to the upper end of the elastic sheet, a clamping groove.

As preferred, first spring has been cup jointed in the outside of piston rod, the lower extreme contact of first spring is connected with the piston rod shroud that prevents dust, the upper end contact of first spring is connected with the gleitbretter, gleitbretter and piston rod sliding connection, the second spring has been cup jointed in the outside of piston rod, the lower extreme and the gleitbretter contact of second spring, the upper end contact of second spring is connected with the cover, the upper end of piston rod is provided with the thread piece, the outside sliding connection of piston rod has the cover, there is the connecting seat upper end of thread piece through threaded connection, the upper end fixedly connected with splice bar of connecting seat, the upper end fixedly connected with of splice bar goes up rings.

Preferably, the number of the radiating pipes is multiple, and the multiple radiating pipes are arranged on the heat conducting cylinder in an annular array.

Preferably, the number of the rubber adding pipes is two, and the two rubber adding pipes are symmetrically distributed on two sides of the heat conducting cylinder.

Preferably, the upper end of the piston is provided with a square groove, and a square block is clamped inside the square groove.

Preferably, an annular groove is formed in a surface of the floating piston, and a third seal ring is fitted into the annular groove and contacts an inner wall of the liquid cartridge.

Preferably, the interior of the piston rod is of a hollow structure, a power line is inserted into the piston rod, one end of the power line is connected with the electromagnetic coil, the other end of the power line is led out from the interior of the piston rod, and the led-out part is sealed by a sealing plug.

The invention has the beneficial effects that: the invention relates to a magneto-rheological damper, which has the characteristics of good heat dissipation performance and stable piston installation, in specific use, a piston and a liquid storage cylinder generate relative displacement to generate heat, the heat can be transferred to a heat conduction cylinder, the heat on the heat conduction cylinder can be transferred to a heat dissipation sheet to dissipate heat, and in a vibration environment, a sliding sheet vibrates up and down to generate air flow to dissipate heat of the heat dissipation pipe, so that the heat dissipation effect is excellent, the phenomenon that the liquid storage cylinder deforms due to overhigh temperature, the damper is damaged, and the service life is reduced;

through designing square groove on the piston, square groove and the cooperation of the square piece on the connecting axle prevent that piston and connecting axle from taking place relative rotation, and at the bottom design draw-in groove of piston, design shell fragment and fixture block on the nut, through the cooperation of fixture block and draw-in groove, prevent that the nut from rotating, thereby make the piston in the vibrations in-process, the unable relative connecting axle of nut takes place relative rotation, thereby guaranteed the installation fastening of nut, can not take place to become flexible, thereby avoid piston installation unstability to lead to the bumper shock absorber to become invalid.

Description of the drawings:

for ease of illustration, the invention is described in detail by the following detailed description and the accompanying drawings.

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

FIG. 2 is an enlarged view of the portion A of FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the portion B of FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of the piston structure of FIG. 1 in accordance with the present invention;

FIG. 5 is an enlarged view of the structure of the portion C of FIG. 4 according to the present invention;

FIG. 6 is an enlarged view of the structure of portion D of FIG. 4 according to the present invention;

FIG. 7 is an enlarged view of the guide of FIG. 1 in accordance with the present invention;

fig. 8 is a top view of the heat conducting cartridge of fig. 1 in accordance with the present invention.

In the figure: 1. a lower lifting ring; 2. a valve core; 3. a first seal ring; 4. a liquid storage barrel; 5. a second seal ring; 6. a heat conducting tube; 61. a radiating pipe; 62. heat conducting silica gel; 63. adding a rubber tube; 64. a sealing cover; 65. a heat sink; 7. a piston rod dust cover; 71. a dustproof oil seal; 72. a guide; 73. a fourth seal ring; 74. a fifth seal ring; 75. oil sealing rubber sleeve; 76. an oil seal retainer ring; 77. a sixth seal ring; 78. an inner buffer block; 8. a piston; 81. a damping hole; 82. an electromagnetic coil; 83. a square groove; 84. a square block; 85. a connecting shaft; 86. a baffle ring; 87. a piston rod; 88. a gasket; 89. a nut; 810. a spring plate; 811. a clamping block; 812. a card slot; 813. a first spring; 814. sliding blades; 815. a second spring; 816. a thread block; 817. a cushion cover; 818. a connecting seat; 819. connecting ribs; 820. an upper hanging ring; 9. a floating piston; 91. an annular groove; 92. a third seal ring; 10. magnetic flow liquid; 11. nitrogen gas; 12. a power line.

The specific implementation mode is as follows:

as shown in fig. 1 to 8, the following technical solutions are adopted in the present embodiment:

example (b):

a magneto-rheological shock absorber comprises a lower hanging ring 1, a valve core 2, a first sealing ring 3, a liquid storage cylinder 4, a second sealing ring 5, a heat conduction cylinder 6, a piston rod dustproof cover 7, a piston 8, a floating piston 9, magneto-rheological fluid 10 and nitrogen 11, wherein the valve core 2 is fixedly installed on the side wall of the lower hanging ring 1, the first sealing ring 3 is installed between the lower hanging ring 1 and the valve core 2, the liquid storage cylinder 4 is connected to the upper end of the lower hanging ring 1 through threads, the second sealing ring 5 is installed at the joint of the liquid storage cylinder 4 and the lower hanging ring 1, the heat conduction cylinder 6 is fixedly connected to the outer side of the liquid storage cylinder 4, the piston rod dustproof cover 7 is connected to the upper end of the liquid storage cylinder 4 through threads, the piston 8 is connected to the liquid storage cylinder 4 in a sliding manner, the floating piston 9 is connected to the liquid storage cylinder 4 in a sliding manner, and the, and nitrogen 11 is filled between the floating piston 9 and the lower lifting ring 1.

Wherein, the inside fixedly connected with cooling tube 61 of heat conduction section of thick bamboo 6, cooling tube 61 runs through heat conduction section of thick bamboo 6, the intussuseption of heat conduction section of thick bamboo 6 is filled with heat conduction silica gel 62, the lateral wall of heat conduction section of thick bamboo 6 is provided with rubber tube 63, rubber tube 63's end has sealed lid 64 through threaded connection, the outside fixedly connected with fin 65 of heat conduction section of thick bamboo 6, the quantity of fin 65 is a plurality of, and is a plurality of fin 65 is evenly distributed in the outside of heat conduction section of thick bamboo 6.

The inner side of the piston rod dust cover 7 is fixedly provided with a dust-proof oil seal 71, the inner part of the dust-proof oil seal 71 is slidably connected with a piston rod 87, the outer side of the piston rod 87 is slidably connected with a guider 72, the guider 72 is fixedly arranged in the liquid storage cylinder 4, a fourth sealing ring 73 and a fifth sealing ring 74 are arranged between the liquid storage cylinder 4 and the guider 72, an oil seal rubber sleeve 75 is arranged in the guider 72, the oil seal rubber sleeve 75 is slidably connected with the piston rod 87, an oil seal retainer ring 76 is fixedly arranged in the guider 72, the oil seal retainer ring 76 is slidably connected with the piston rod 87, a sixth sealing ring 77 is arranged at the bottom of the oil seal retainer ring 76, an inner buffer block 78 is arranged at the bottom of the guider 72, and the inner buffer block 78 is in contact with the sixth sealing.

Damping holes 81 are formed in the upper end and the lower end of the piston 8, an electromagnetic coil 82 is installed on the outer side of the piston 8, a connecting shaft 85 is installed in the piston 8, a square block 84 is fixedly connected to the outer side of the connecting shaft 85, a baffle ring 86 is fixedly connected to the outer side of the connecting shaft 85, the baffle ring 86 is in contact with the piston 8, a piston rod 87 is fixedly connected to the upper end of the connecting shaft 85, a gasket 88 is sleeved on the outer side of the connecting shaft 85, the gasket 88 is located at the lower end of the piston 8, a nut 89 is connected to the bottom of the connecting shaft 85 through threads, the nut 89 is in contact with the gasket 88, a spring sheet is fixedly connected to the surface of the nut 89, a clamping block 811 is fixedly connected to the upper end of the spring sheet 810, a clamping groove 812.

The outer side of the piston rod 87 is sleeved with a first spring 813, the lower end of the first spring 813 is in contact connection with a piston rod dust-proof cover cap 7, the upper end of the first spring 813 is in contact connection with a sliding piece 814, the sliding piece 814 is in sliding connection with the piston rod 87, the outer side of the piston rod 87 is sleeved with a second spring 815, the lower end of the second spring 815 is in contact with the sliding piece 814, the upper end of the second spring 815 is in contact connection with a cushion cover 817, the upper end of the piston rod 87 is provided with a threaded block 816, the outer side of the piston rod 87 is in sliding connection with the cushion cover 817, the upper end of the threaded block 816 is in threaded connection with a connecting seat 818, the upper end of the connecting seat 818 is fixedly connected with a connecting rib 819.

The number of the heat dissipation pipes 61 is plural, and the heat dissipation pipes 61 are arranged on the heat conduction cylinder 6 in an annular array.

The number of the rubber adding pipes 63 is two, and the two rubber adding pipes 63 are symmetrically distributed on two sides of the heat conducting cylinder 6.

The upper end of the piston 8 is provided with a square groove 83, and a square block 84 is clamped inside the square groove 83.

An annular groove 91 is formed in the surface of the floating piston 9, a third sealing ring 92 is embedded in the annular groove 91, and the third sealing ring 92 is in contact with the inner wall of the liquid storage barrel 4.

The interior of the piston rod 87 is a hollow structure, the power cord 12 is inserted into the piston rod 87, one end of the power cord 12 is connected with the electromagnetic coil 82, the other end of the power cord 12 is led out from the piston rod 87, and the led-out part is sealed by a sealing plug.

The using state of the invention is as follows: after the shock absorber is installed on an automobile suspension, when an automobile runs, the shock absorber can vibrate, so that the piston rod 87 drives the connecting shaft 85 to move, the connecting shaft 85 drives the piston 8 to move, the piston 8 and the liquid storage cylinder 4 slide relatively, the liquid storage cylinder 4 is filled with magnetic fluid 10, and nitrogen 11 is filled between the floating piston 9 and the lower hanging ring 1, so that the shock absorber has a good shock absorption effect and belongs to the prior art; when the piston 8 and the liquid storage barrel 4 move relatively, heat can be generated due to frequent contact friction, so that the temperature of the liquid storage barrel 4 rises, the heat of the liquid storage barrel 4 can be transferred to the heat conduction barrel 6 and the radiating fins 65, the heat is radiated through the heat conduction barrel 6 and the radiating fins 65, the heat conduction barrel 6 is filled with the heat conduction silica gel 62, the heat conduction silica gel 62 can absorb the heat and transfer the heat to the radiating pipe 61, the sliding piece 814 can be driven to vibrate up and down in the moving process of the piston rod 87, the first spring 813 and the second spring 815 are respectively arranged on the upper part and the lower part of the sliding piece 814, so that the sliding piece 814 vibrates continuously to generate wind power to fan the radiating pipe 61, and the radiating pipe 61 is radiated, so that the liquid storage barrel 4 has; through design square groove 83 on piston 8, square groove 83 cooperates with square piece 84 on the connecting axle 85, prevent that piston 8 and connecting axle 85 from taking place relative rotation, and design draw-in groove 812 in the bottom of piston 8, design shell fragment 810 and fixture block 811 on nut 89, cooperation through fixture block 811 and draw-in groove 812, prevent that nut 89 from rotating, thereby make piston 8 in vibrations in-process, the unable relative rotation takes place for connecting axle 85 of nut 89, thereby the installation fastening of nut 89 has been guaranteed, can not take place to become flexible, thereby avoid piston 8 installation unstability to lead to the bumper shock absorber to become invalid.

While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims

1. The utility model provides a magnetic current becomes bumper shock absorber, includes rings (1), valve core (2), first sealing washer (3), receiver (4), second sealing washer (5), heat-conducting cylinder (6), piston rod dust cover (7), piston (8), floating piston (9), magnetic fluid (10) and nitrogen gas (11) down, its characterized in that: the side wall of the lower lifting ring (1) is fixedly provided with a valve core (2), a first sealing ring (3) is arranged between the lower lifting ring (1) and the valve core (2), the upper end of the lower hanging ring (1) is connected with a liquid storage cylinder (4) through threads, a second sealing ring (5) is arranged at the joint of the liquid storage cylinder (4) and the lower hanging ring (1), the outer side of the liquid storage barrel (4) is fixedly connected with a heat conducting barrel (6), the upper end of the liquid storage barrel (4) is connected with a piston rod dustproof cover cap (7) through threads, a piston (8) is connected in the liquid storage barrel (4) in a sliding way, a floating piston (9) is connected in the liquid storage barrel (4) in a sliding way, the space between the floating piston (9) and the piston (8) is filled with magnetic fluid (10), and nitrogen (11) is filled between the floating piston (9) and the lower lifting ring (1).

2. The magnetorheological damper of claim 1, wherein: the inside fixedly connected with cooling tube (61) of heat conduction section of thick bamboo (6), cooling tube (61) run through heat conduction section of thick bamboo (6), heat conduction section of thick bamboo (6) intussuseption is filled with heat conduction silica gel (62), the lateral wall of heat conduction section of thick bamboo (6) is provided with rubber tube (63), the end of adding rubber tube (63) has sealed lid (64) through threaded connection, the outside fixedly connected with fin (65) of heat conduction section of thick bamboo (6), the quantity of fin (65) is a plurality of, and is a plurality of fin (65) are evenly distributed in the outside of heat conduction section of thick bamboo (6).

3. The magnetorheological damper of claim 1, wherein: the inner side of the piston rod dust cover (7) is fixedly provided with a dust seal (71), the interior of the dust seal (71) is connected with a piston rod (87) in a sliding manner, the outer side of the piston rod (87) is connected with a guider (72) in a sliding manner, the guider (72) is fixedly arranged in the liquid storage cylinder (4), a fourth sealing ring (73) and a fifth sealing ring (74) are arranged between the liquid storage cylinder (4) and the guider (72), an oil seal rubber sleeve (75) is arranged in the guider (72), the oil seal rubber sleeve (75) is connected with the piston rod (87) in a sliding manner, an oil seal retainer ring (76) is fixedly arranged in the guider (72), the oil seal retainer ring (76) is connected with the piston rod (87) in a sliding manner, a sixth sealing ring (77) is arranged at the bottom of the oil seal retainer ring (76), and an inner buffer block (78) is arranged at, the inner buffer block (78) is in contact with a sixth sealing ring (77).

4. The magnetorheological damper of claim 1, wherein: damping holes (81) are formed in the upper end and the lower end of the piston (8), an electromagnetic coil (82) is installed on the outer side of the piston (8), a connecting shaft (85) is installed in the piston (8), a square block (84) is fixedly connected to the outer side of the connecting shaft (85), a baffle ring (86) is fixedly connected to the outer side of the connecting shaft (85), the baffle ring (86) is in contact with the piston (8), a piston rod (87) is fixedly connected to the upper end of the connecting shaft (85), a gasket (88) is sleeved on the outer side of the connecting shaft (85), the gasket (88) is located at the lower end of the piston (8), a nut (89) is connected to the bottom of the connecting shaft (85) through threads, the nut (89) is in contact with the gasket (88), an elastic sheet (810) is fixedly connected to the surface of the nut (89), and a clamping block (811, the lower end of the piston (8) is provided with a clamping groove (812), and a clamping block (811) is clamped in the clamping groove (812).

5. The magnetorheological damper of claim 4, wherein: a first spring (813) is sleeved on the outer side of the piston rod (87), the lower end of the first spring (813) is connected with a piston rod dust cover (7) in a contact manner, the upper end of the first spring (813) is connected with a sliding sheet (814) in a contact way, the sliding sheet (814) is connected with a piston rod (87) in a sliding way, a second spring (815) is sleeved on the outer side of the piston rod (87), the lower end of the second spring (815) is in contact with the sliding sheet (814), the upper end of the second spring (815) is in contact connection with a cushion cover (817), the upper end of the piston rod (87) is provided with a threaded block (816), the outer side of the piston rod (87) is connected with a cushion cover (817) in a sliding way, the upper end of the thread block (816) is connected with a connecting seat (818) through threads, the upper end of the connecting seat (818) is fixedly connected with a connecting rib (819), and the upper end of the connecting rib (819) is fixedly connected with an upper hanging ring (820).

6. The magnetorheological damper of claim 2, wherein: the number of cooling tubes (61) is a plurality of, and a plurality of cooling tubes (61) are arranged on heat conduction cylinder (6) in an annular array.

7. The magnetorheological damper of claim 2, wherein: the number of the rubber adding pipes (63) is two, and the two rubber adding pipes (63) are symmetrically distributed on two sides of the heat conducting cylinder (6).

8. The magnetorheological damper of claim 4, wherein: the upper end of the piston (8) is provided with a square groove (83), and a square block (84) is clamped inside the square groove (83).

9. The magnetorheological damper of claim 1, wherein: an annular groove (91) is formed in the surface of the floating piston (9), a third sealing ring (92) is embedded in the annular groove (91), and the third sealing ring (92) is in contact with the inner wall of the liquid storage barrel (4).

10. The magnetorheological damper of claim 4, wherein: the piston rod (87) is of a hollow structure, a power line (12) is inserted into the piston rod (87), one end of the power line (12) is connected with the electromagnetic coil (82), the other end of the power line (12) is led out of the piston rod (87), and the led-out part is sealed through a sealing plug.