CN217873954U - Single-cylinder magnetorheological damper for automobile and electromagnetic structure thereof - Google Patents
Single-cylinder magnetorheological damper for automobile and electromagnetic structure thereof Download PDFInfo
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- CN217873954U CN217873954U CN202221656298.8U CN202221656298U CN217873954U CN 217873954 U CN217873954 U CN 217873954U CN 202221656298 U CN202221656298 U CN 202221656298U CN 217873954 U CN217873954 U CN 217873954U
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Abstract
The automotive single-cylinder magnetorheological damper comprises a cylinder barrel, a free piston and a damping piston, wherein the free piston and the damping piston are arranged in the cylinder barrel; the working part is embedded with a group of A ring magnets which are distributed at intervals along the axial direction, correspondingly, the damping piston is embedded with a group of B ring magnets which are distributed at intervals along the axial direction, the A ring magnets are arranged in a staggered mode relative to the B ring magnets, the magnetic pole distribution direction of the A ring magnets is opposite to the magnetic pole distribution direction of the B ring magnets, and the magnetic pole distribution direction of the B ring magnets is the same as the magnetic pole distribution direction of the coils after the coils are electrified. The utility model discloses a set up the magnetic field potential barrier in magnetic current becomes the bumper shock absorber, change the direction of magnetic field circulation for the magnetic flow can be more perpendicular to magnetic current becomes the working channel of damping fluid, has enlarged the influence scope in magnetic field, and the numerical value of the output range of damping force and the biggest damping force is big than prior art's magnetic current becomes the bumper shock absorber. Correspondingly, the utility model also provides an electromagnetic structure of single section of thick bamboo magnetic current becomes bumper shock absorber for the car.
Description
Technical Field
The utility model relates to a bumper shock absorber technical field especially relates to single section of thick bamboo magnetic current becomes bumper shock absorber and electromagnetic structure for car.
Background
The magnetorheological damping fluid has the characteristics of low-viscosity Newtonian fluid under the action of no magnetic field; under the action of strong magnetic field, the Binghan body has high viscosity and low flowability. The rheology of the magnetorheological damping fluid under the action of a magnetic field is instantaneous and reversible, so that the magnetorheological damping fluid has stronger damping performance, and the viscosity of the magnetorheological damping fluid and the magnetic flux have a one-to-one correspondence relationship.
The magnetorheological damper has low energy consumption and millisecond response, and is a semi-active control device with excellent performance. The output range of the damping force and the maximum damping force value are the main points of research in the field of magnetorheological shock absorbers. In the magnetorheological shock absorber, the working clearance and path of the magnetorheological damping fluid directly influence the two major research points. The traditional magneto-rheological shock absorber takes the gap between the damping piston and the cylinder barrel as a damping channel, the effective damping gap is only concentrated near the two ends of the coil, the effective damping length is short, and the output range of the damping force and the value of the maximum damping force are limited.
SUMMERY OF THE UTILITY MODEL
To the deficiency of the prior art, the utility model provides a single section of thick bamboo magnetic current becomes bumper shock absorber for car. The utility model discloses a set up magnetic field potential barrier in magnetic current becomes bumper shock absorber, change the direction in magnetic field for the magnetic flow can be more perpendicular to magnetic current becomes the working channel of damping fluid, has enlarged the influence scope in magnetic field, makes the numerical value of the output range of damping force and maximum damping force great than prior art's magnetic current becomes the bumper shock absorber. Correspondingly, the utility model discloses still provide the electromagnetic structure of single section of thick bamboo magneto rheological shock absorber for the car, adopt the utility model discloses the magneto rheological shock absorber of electromagnetic structure has the output range of bigger damping force and the numerical value of maximum damping force than prior art.
To the bumper shock absorber, the technical scheme of the utility model as follows:
the automotive single-cylinder magnetorheological damper comprises a cylinder barrel, a free piston and a damping piston, wherein the free piston and the damping piston are arranged in the cylinder barrel; the damping piston is connected with a piston rod, the piston rod is in sliding fit with the top end of the cylinder barrel and is sealed through a sealing element, a vehicle body lifting ring is arranged at the top of the piston rod, the bottom end of the cylinder barrel is sealed by a bottom cover, and a chassis lifting ring is arranged on the outer side of the bottom cover; the bottom end of the cylinder barrel is sealed by a bottom cover; the free piston divides the inner space of the cylinder barrel into a gas chamber and a damping oil chamber, and the damping piston is positioned in the damping oil chamber; the gas chamber is filled with inert gas, and the damping oil chamber is filled with magnetorheological damping liquid; a coil is arranged on the damping piston; a gap exists between the damping piston and the working part on the inner side of the cylinder barrel to form a damping gap; inlay on the working portion and be equipped with a set of A ring magnet that is interval distribution along the axial, correspond, the damping piston inlays on being equipped with a set of B ring magnet along axial interval distribution, the relative B ring magnet dislocation set of A ring magnet, and the magnetic pole distribution direction of A ring magnet is opposite with the magnetic pole distribution direction of B ring magnet, and the magnetic pole distribution direction of B ring magnet is the same with the magnetic pole distribution direction after the coil circular telegram.
Compared with the prior art, the utility model discloses a set up magnet according to specific mode on the work portion of cylinder and damping piston, form magnetic field potential barrier, the during operation, the working channel of perpendicular to magnetic current that the magnetic flow can be more becomes damping fluid has enlarged the influence scope in magnetic field, and effective damping length is great to make the output range of damping force and the magnetic current nature magnetic current who maximizes the damping force's numerical value than prior art big.
Preferably, in the single-cylinder magnetorheological damper for the automobile, the inner wall of the cylinder barrel is provided with a step to form a working part; a group of damping holes which are uniformly distributed along the circumferential direction are formed in the cylinder barrel at the position of the working part; the damping hole comprises an axial section and a radial section, and the axial section is communicated with the damping gap through the radial section. By arranging the damping holes, the shearing area of the magnetorheological damping fluid is increased, so that the output range of the damping force and the numerical value of the maximum damping force are further improved.
As an optimization, in the single-cylinder magnetorheological damper for the automobile, the piston rod comprises an outer rod and an inner rod; the outer rod consists of a large section and a small section, and a ladder shape is formed; the damping piston is sleeved on the small section of the outer rod, one end of the damping piston is abutted to the shaft shoulder on the outer rod to form positioning, and the other end of the damping piston is pressed by the inner rod which is connected with the small section of the outer rod through threads to form positioning. With this structure, the reliability is high, and it is easy to manufacture and assemble.
Furthermore, a gasket is arranged between the inner rod and the damping piston. Through setting up the gasket, be favorable to improving threaded connection's intensity.
Further, the outer rod is hollow, and a lead of the coil is led out from the hollow structure of the outer rod. The outer rod is designed to be hollow and used for leading out a lead of the coil, and meanwhile, the purpose of light weight is achieved.
Furthermore, the inner rod passes through a hole position on the free piston to form sliding fit with the free piston and is sealed by a sealing element. Therefore, the free piston has a radial limiting effect on the free piston, and the effect of preventing the damping piston from shaking radially in the working process is achieved.
Preferably, in the automotive single-cylinder magnetorheological damper, the air chamber is filled with nitrogen. Nitrogen is an inert gas which is easy to obtain, and is beneficial to controlling the cost.
Preferably, in the automotive single-cylinder magnetorheological damper, the cross section of the free piston is U-shaped. By adopting the structural design, the matching length of the free piston and the cylinder barrel can be ensured, and the sealing is facilitated; meanwhile, the design also plays a role in light weight.
Preferably, in the single-cylinder magnetorheological damper for the automobile, the A annular magnets are arranged on the working part at equal intervals; the B ring magnets are arranged on the damping piston at equal intervals.
To the electromagnetic structure, the utility model provides a following technical scheme:
the electromagnetic structure of the single-cylinder magnetorheological shock absorber for the automobile comprises a coil arranged on a damping piston; the damping piston is characterized by also comprising a group of annular magnets A which are embedded on the working part of the cylinder barrel at intervals along the axial direction, and a group of annular magnets B which are correspondingly embedded on the damping piston at intervals along the axial direction; the annular magnet A is arranged in a staggered mode relative to the annular magnet B, the magnetic pole distribution direction of the annular magnet A is opposite to that of the annular magnet B, and the magnetic pole distribution direction of the annular magnet B is the same as that of the coil after the coil is electrified.
Compared with the prior art, the utility model discloses an electromagnetic structure is through adopting specific structure for the working channel of perpendicular to magneto rheological damping fluid that the magnetic flux can be more has enlarged the influence scope in magnetic field, and effective damping length is great, thereby makes the numerical value of the output range of damping force and the biggest damping force great than prior art's magneto rheological shock absorber.
Preferably, in the electromagnetic structure of the automotive single-cylinder magnetorheological damper, the ring-shaped magnet a and the ring-shaped magnet B are formed by splicing a plurality of arc-shaped subsections.
Drawings
FIG. 1 is a schematic structural view of a single cylinder magnetorheological damper for an automobile according to an embodiment of the present invention;
FIG. 2 is a schematic view of the magnetic circuit of the single-cylinder magnetorheological damper for the vehicle of the present invention.
The symbols in the drawings are: 1-cylinder barrel, 101-working part; 2-a free piston; 3-a damping piston; 4-bottom cover; 5-piston rod, 501-outer rod, 502-inner rod; 6-a coil; 7-damping gap; 8-A ring magnet; 9-B ring magnet; 10-damping hole, 11-gasket; 12-a vehicle body sling; 13-chassis lifting ring.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention. In the following examples, those not described in detail are conventional means or common technical knowledge in the art.
Referring to fig. 1-2, in the solution of the present invention, the electromagnetic structure of the automotive single-cylinder magnetorheological damper comprises a coil 6 disposed on a damping piston 3; different from the prior art: the electromagnetic structure of the utility model also comprises a group of A annular magnets 8 which are embedded on the working part 101 of the cylinder barrel 1 at intervals along the axial direction, and a group of B annular magnets 9 which are correspondingly embedded on the damping piston 3 at intervals along the axial direction; the ring-shaped magnet A8 is arranged in a staggered mode relative to the ring-shaped magnet B9, the magnetic pole distribution direction of the ring-shaped magnet A8 is opposite to that of the ring-shaped magnet B9, and the magnetic pole distribution direction of the ring-shaped magnet B9 is the same as that of the energized coil 6. Adopt the utility model discloses the magneto rheological shock absorber of electromagnetic structure has bigger damping force output range and maximum damping force value.
The technical solution of the present invention will be further described with reference to a specific embodiment of a shock absorber.
Example (see fig. 1 and 2):
the automotive single-cylinder magneto-rheological shock absorber comprises a cylinder barrel 1, a free piston 2 and a damping piston 3, wherein the free piston 2 and the damping piston 3 are arranged in the cylinder barrel 1; the damping piston 3 is connected with a piston rod 5, the piston rod 5 is in sliding fit with the top end of the cylinder barrel 1 and is sealed through a sealing element (the piston rod 5 is matched with a guide hole in the top of the cylinder barrel 1), and the bottom end of the cylinder barrel 1 is sealed by a bottom cover 4; the free piston 2 divides the inner space of the cylinder barrel 1 into an air chamber and a damping oil chamber, and the damping piston 3 is positioned in the damping oil chamber; the gas chamber is filled with inert gas, and the damping oil chamber is filled with magnetorheological damping liquid; the damping piston 3 is provided with a coil 6; a gap exists between the damping piston 3 and the working part 101 on the inner side of the cylinder barrel 1 to form a damping gap 7; different from the prior art, the utility model discloses in the scheme: it is equipped with a set of A ring magnet 8 that is interval distribution along the axial to inlay on the work portion 101, correspond, it is equipped with a set of B ring magnet 9 along axial interval distribution to inlay on the damping piston 3, 8 relative B ring magnet dislocation sets of A ring magnet, and the magnetic pole distribution direction of A ring magnet 8 and the magnetic pole distribution direction of B ring magnet 9 are opposite, and the magnetic pole distribution direction of B ring magnet 9 is the same with the magnetic pole distribution direction after the circular telegram of coil 6 (namely S of A ring magnet 8 is directional the same with N of B ring magnet 9 is directional, and N of B ring magnet 9 is directional the same with N of coil 6 is directional).
The utility model discloses when magnetic current becomes shock absorber moves away to avoid possible earthquakes, damping piston 3 removes along work portion 101, and magnetic current becomes damping fluid and receives the extrusion, flows from the damping passageway, produces the damping force. The magnetic fields generated by the annular magnet A8 and the annular magnet B9 and the magnetic field generated by the coil 6 are superposed to form a magnetic field potential barrier, so that the magnetic flux can be more vertical to the working channel of the magnetorheological damping fluid, the effective damping length is increased, and the damping force output range and the maximum damping force value are larger.
In this embodiment: the inner wall of the cylinder barrel 1 is provided with steps to form a working part 101; a group of damping holes 10 which are uniformly distributed along the circumferential direction are formed in the cylinder barrel 1 at the position of the working part 101; the damping hole 10 comprises an axial section and a radial section, and the axial section is communicated with the damping gap 7 through the radial section. The additional arrangement of the damping holes 10 increases the shearing area of the magnetorheological damping fluid, thereby further enlarging the output range of the damping force and the maximum damping force value of the magnetorheological shock absorber.
In this embodiment: the piston rod 5 comprises an outer rod 501 and an inner rod 502; the outer rod 501 is composed of a large section and a small section, and is in a ladder shape; the damping piston 3 is sleeved on a small section of the outer rod 501, one end of the damping piston abuts against a shaft shoulder on the outer rod 501 to form a location, and the other end of the damping piston is pressed by the inner rod 502 which is in threaded connection with the small section of the outer rod 501 to form a location.
In this embodiment: a gasket 11 is arranged between the inner rod 502 and the damping piston 3. The gasket 11 makes the threaded connection between the inner rod 502 and the outer rod 501 stronger and has a sealing function.
In this embodiment: the outer rod 501 is hollow, and the lead of the coil 6 is led out from the hollow structure of the outer rod 501. The outer rod 501 is designed to be hollow, and is used for leading out a lead of the coil 6, and the purpose of light weight is achieved.
In this embodiment: the inner rod 502 passes through a hole on the free piston 2 to form a sliding fit with the free piston 2 and is sealed by a sealing element. The free piston 2 thus has a radial stop for the piston rod 5.
In this embodiment: and the gas chamber is filled with nitrogen. Nitrogen is an inert gas which is easy to obtain, and is beneficial to controlling the cost.
In this embodiment: the section of the free piston 2 is U-shaped. By adopting the structural design, the matching length of the free piston and the cylinder barrel can be ensured, and the sealing is facilitated; meanwhile, the design also plays a role in light weight.
In this embodiment: the A ring magnets 8 are arranged on the working part 101 at equal intervals; the B ring magnets 9 are equidistantly arranged on the damping piston 3.
In this embodiment, a screw thread is formed at the tip of the outer rod 501, and the vehicle body suspension ring 12 is fixed to the piston rod 5 by a screw connection structure. The threaded connection has high reliability and is easy to process.
In this embodiment, a stud structure is provided on the outer side of the bottom cover 4, and the chassis hanging ring 13 is fixed on the bottom cover 4 through a threaded connection structure. The threaded connection has high reliability and is easy to process.
In the present embodiment, the a ring magnet 8 and the B ring magnet 9 are each composed of a plurality of arc-shaped subsections. The design can reduce the manufacturing difficulty and is beneficial to industrialized implementation.
Claims (9)
1. The single-cylinder magnetorheological damper for the automobile is characterized in that: comprises a cylinder barrel (1), a free piston (2) and a damping piston (3) which are arranged in the cylinder barrel (1); the damping piston (3) is connected with a piston rod (5), the piston rod (5) is in sliding fit with the top end of the cylinder barrel (1) and is sealed through a sealing piece, a vehicle body lifting ring (12) is arranged at the top of the piston rod (5), the bottom end of the cylinder barrel (1) is sealed by a bottom cover (4), and a chassis lifting ring (13) is arranged on the outer side of the bottom cover (4); the free piston (2) divides the inner space of the cylinder barrel (1) into an air chamber and a damping oil chamber, and the damping piston (3) is positioned in the damping oil chamber; the gas chamber is filled with inert gas, and the damping oil chamber is filled with magnetorheological damping liquid; a coil (6) is arranged on the damping piston (3); a gap exists between the damping piston (3) and a working part (101) on the inner side of the cylinder barrel (1) to form a damping gap (7); inlay on work portion (101) and be equipped with a set of A ring magnet (8) that are interval distribution along the axial, correspond, inlay on damping piston (3) and be equipped with a set of B ring magnet (9) along axial interval distribution, the relative B ring magnet (9) dislocation set of A ring magnet (8), and the magnetic pole distribution direction of A ring magnet (8) and B ring magnet (9) is opposite, and the magnetic pole distribution direction after the magnetic pole distribution direction of B ring magnet (9) and coil (6) circular telegram is the same.
2. The monotubular magnetorheological damper for the automobile according to claim 1, wherein: the inner wall of the cylinder barrel (1) is provided with steps to form a working part (101); a group of damping holes (10) which are uniformly distributed along the circumferential direction are formed in the cylinder barrel (1) at the position of the working part (101); the damping hole (10) comprises an axial section and a radial section, and the axial section is communicated with the damping gap (7) through the radial section.
3. The monotubular magnetorheological damper for the automobile according to claim 1, wherein: the piston rod (5) comprises an outer rod (501) and an inner rod (502); the outer rod (501) is composed of a large section and a small section, and a ladder shape is formed; the damping piston (3) is sleeved on the small section of the outer rod (501), one end of the damping piston is abutted against a shaft shoulder on the outer rod (501) to form positioning, and the other end of the damping piston is pressed by the inner rod (502) which is connected with the small section of the outer rod (501) through threads to form positioning.
4. The single-cylinder magnetorheological damper for the automobile of claim 3, wherein: the outer rod (501) is hollow, and a lead of the coil (6) is led out from the hollow structure of the outer rod (501).
5. The single-cylinder magnetorheological damper for the automobile according to claim 3 or 4, wherein: the inner rod (502) penetrates through a hole position on the free piston (2) to form sliding fit with the free piston (2) and is sealed through a sealing piece.
6. The monotubular magnetorheological damper for the automobile according to claim 1, wherein: the section of the free piston (2) is U-shaped.
7. The monotubular magnetorheological damper for the automobile according to claim 1, wherein: the A ring magnets (8) are arranged on the working part (101) at equal intervals; the B ring magnets (9) are arranged on the damping piston (3) at equal intervals.
8. The electromagnetic structure of the single-cylinder magnetorheological shock absorber for the automobile comprises a coil (6) arranged on a damping piston (3); the method is characterized in that: the damping piston is characterized by also comprising a group of annular magnets (8) which are embedded on the working part (101) of the cylinder barrel (1) at intervals along the axial direction, and a group of annular magnets (9) which are correspondingly embedded on the damping piston (3) at intervals along the axial direction; the annular magnet A (8) is arranged in a staggered mode relative to the annular magnet B (9), the magnetic pole distribution direction of the annular magnet A (8) is opposite to that of the annular magnet B (9), and the magnetic pole distribution direction of the annular magnet B (9) is the same as that of the energized coil (6).
9. The electromagnetic structure of the single-cylinder magnetorheological damper for the automobile according to claim 8, wherein: the annular magnet A (8) and the annular magnet B (9) are formed by splicing a plurality of arc-shaped subsections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221656298.8U CN217873954U (en) | 2022-06-29 | 2022-06-29 | Single-cylinder magnetorheological damper for automobile and electromagnetic structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221656298.8U CN217873954U (en) | 2022-06-29 | 2022-06-29 | Single-cylinder magnetorheological damper for automobile and electromagnetic structure thereof |
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| Publication Number | Publication Date |
|---|---|
| CN217873954U true CN217873954U (en) | 2022-11-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221656298.8U Active CN217873954U (en) | 2022-06-29 | 2022-06-29 | Single-cylinder magnetorheological damper for automobile and electromagnetic structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217873954U (en) |
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- 2022-06-29 CN CN202221656298.8U patent/CN217873954U/en active Active
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