CN221170542U - Piston assembly of shock absorber - Google Patents
Piston assembly of shock absorber Download PDFInfo
- Publication number
- CN221170542U CN221170542U CN202322709794.6U CN202322709794U CN221170542U CN 221170542 U CN221170542 U CN 221170542U CN 202322709794 U CN202322709794 U CN 202322709794U CN 221170542 U CN221170542 U CN 221170542U
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- Prior art keywords
- piston
- pressing plate
- hole
- magnetic core
- bypass
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- 239000006096 absorbing agent Substances 0.000 title claims abstract description 13
- 230000035939 shock Effects 0.000 title claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000012530 fluid Substances 0.000 description 8
- 238000009434 installation Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Fluid-Damping Devices (AREA)
Abstract
The utility model discloses a piston assembly of a shock absorber, which comprises a piston shell, a magnetic core, an upper piston pressing plate and a lower piston pressing plate; the upper piston pressing plate and the lower piston pressing plate are respectively provided with a main through hole, the magnetic core and the piston shell form a main flow channel, and the main through holes are communicated with the main flow channel to form a main channel; the upper piston pressing plate and the magnetic core are internally provided with a first mounting hole and a second mounting hole respectively, the magnetic core is provided with a coil groove, the upper piston pressing plate and the lower piston pressing plate are respectively provided with an upper bypass hole and a lower bypass hole, a bypass flow passage is arranged in the magnetic core, the upper part of the bypass flow passage is an inclined avoidance passage, the upper bypass hole is arranged between the main through hole and the first mounting hole, the bypass flow passage is arranged between the second mounting hole and the coil groove, and the upper bypass hole, the inclined avoidance passage, the bypass flow passage and the lower bypass hole are sequentially communicated to form a bypass passage. According to the utility model, the volumes of the upper piston pressing plate and the magnetic core can be reduced under the condition that the structural strength of the upper piston pressing plate and the magnetic core is ensured, so that the volume of the piston assembly is reduced.
Description
Technical Field
The utility model relates to the technical field of vibration absorbers, in particular to a piston assembly of a vibration absorber.
Background
The magnetorheological damper is a novel actuator with adjustable damping force, the working fluid of the magnetorheological damper is magnetorheological fluid, and when the piston and the cylinder body move relatively, the magnetorheological fluid is extruded to pass through a damping channel on the piston, so that the magnetorheological fluid can generate shearing force. Meanwhile, the rheological property of the magnetorheological fluid is variable under the action of a magnetic field, and the reversible conversion between the Newtonian fluid and the Bingham fluid can be realized in millisecond-level time under the action of an external magnetic field. Therefore, the magnetorheological damper has the characteristics of high response speed and large damping force adjusting range. The piston assembly in the existing magneto-rheological damper generally comprises a piston shell, a magnetic core is arranged in the piston shell, then the magnetic core is fixedly installed in the piston shell through an upper piston pressing plate and a lower piston pressing plate, a main circulation channel is formed between the inner wall of the piston shell and the outer wall of the magnetic core, meanwhile, a bypass channel is generally arranged in the upper pressing plate, the lower pressing plate and the magnetic core, a piston rod passes through the upper pressing plate and then stretches into the magnetic core for convenience, a mounting hole is formed in the upper pressing plate and the magnetic core, a bypass hole is formed in the upper pressing plate, the magnetic core, a coil groove is formed in the magnetic core, therefore, the upper pressing plate is required to be provided with the mounting hole, the bypass hole is required to be formed in the magnetic core, the coil groove is required to be formed in the magnetic core, and in order to ensure the structural strength of the upper pressing plate, the lower pressing plate and the magnetic core, the volume of the upper pressing plate, the lower pressing plate and the magnetic core can be increased, and the volume of the piston assembly is caused to be large.
Disclosure of utility model
The utility model aims to provide a piston assembly of a shock absorber, and aims to solve the problem that the piston assembly of the existing shock absorber is large in size.
In order to achieve the above purpose, the utility model discloses a piston assembly of a shock absorber, which comprises a piston shell, a magnetic core, an upper piston pressing plate and a lower piston pressing plate, wherein the upper piston pressing plate, the magnetic core and the lower piston pressing plate are sleeved in the piston shell from top to bottom, and the upper piston pressing plate and the lower piston pressing plate are respectively used for fixing the magnetic core in the piston shell; the upper piston pressing plate and the lower piston pressing plate are respectively provided with a main through hole, a main circulation channel is formed by a gap between the outer wall of the magnetic core and the inner wall of the piston shell, and the main through holes are communicated with the main circulation channel to form a main channel; the magnetic core is characterized in that a first mounting hole and a second mounting hole for mounting a piston rod are respectively formed in the upper piston pressing plate and the magnetic core, a coil groove is formed in the peripheral wall of the magnetic core, an upper bypass hole and a lower bypass hole are respectively formed in the upper piston pressing plate and the lower piston pressing plate, a bypass flow passage is arranged in the magnetic core, the upper part of the bypass flow passage is inclined to avoid a passage, the upper bypass hole is formed between the main through hole and the first mounting hole, the bypass flow passage is formed between the second mounting hole and the coil groove, and the upper bypass hole, the inclined to avoid a passage, the bypass flow passage and the lower bypass hole are sequentially communicated to form a bypass passage.
Preferably, the upper piston pressing plate and the magnetic core are provided with first positioning holes, and the first positioning holes are used for assisting the alignment of the upper bypass holes and the inclined avoidance channels.
Preferably, the lower piston pressing plate and the magnetic core are provided with second positioning holes, and the second positioning holes are used for assisting the position alignment of the lower bypass holes and the bypass flow channels.
Preferably, the piston housing, the magnetic core, the upper piston pressing plate, the lower piston pressing plate, the first mounting hole and the second mounting hole are all coaxially arranged.
Preferably, the bypass flow passage is vertically arranged as a whole, and the inclined avoidance passage is obliquely arranged from top left to bottom right.
The beneficial effects of the utility model are as follows: according to the piston assembly of the shock absorber, the bypass flow channel is arranged in the magnetic core, the upper portion of the bypass flow channel is the inclined avoidance channel, the inclined avoidance channel can avoid opening the second mounting hole and the coil groove, the upper bypass hole is arranged between the main through hole and the first mounting hole, the upper bypass hole, the inclined avoidance channel, the bypass flow channel and the lower bypass hole are sequentially communicated to form the bypass channel, and therefore the volumes of the upper piston pressure plate and the magnetic core can be reduced under the structural strength of the upper piston pressure plate and the magnetic core, and the volume of the piston assembly is reduced.
The utility model will become more apparent from the following description taken in conjunction with the accompanying drawings which illustrate embodiments of the utility model.
Drawings
Fig. 1 shows an exploded view of a piston assembly.
FIG. 2 is an overall block diagram of the piston assembly.
FIG. 3 shows a cross-sectional view of the piston assembly.
Fig. 4 is a diagram showing the whole structure of the magnetic core.
Fig. 5 shows a cross-sectional view of the magnetic core.
Fig. 6 is a view showing the whole construction of the upper piston press plate.
Detailed Description
Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.
In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
Referring to fig. 1 to 6, a piston assembly of a shock absorber includes a piston housing 400, a magnetic core 410, an upper piston pressing plate 420 and a lower piston pressing plate 421, wherein the upper piston pressing plate 420, the magnetic core 410 and the lower piston pressing plate 421 are sleeved in the piston housing 400 from top to bottom, and the upper piston pressing plate 420 and the lower piston pressing plate 421 are respectively used for fixing the magnetic core 410 in the piston housing 400; the upper piston pressing plate 420 and the lower piston pressing plate 421 are respectively provided with a main through hole 424, a main flow channel 403 is formed by a gap between the outer wall of the magnetic core 410 and the inner wall of the piston housing 400, and the main through holes 424 are communicated with the main flow channel 403 to form a main channel; the upper piston pressing plate 420 and the magnetic core 410 are respectively provided with a first mounting hole 500 and a second mounting hole 510 for mounting a piston rod, a coil groove 520 is formed in the peripheral wall of the magnetic core 410, the upper piston pressing plate 420 and the lower piston pressing plate 421 are respectively provided with an upper bypass hole 425 and a lower bypass hole 4210, a bypass flow passage 412 is arranged in the magnetic core 410, the upper part of the bypass flow passage 412 is provided with an inclined avoidance passage 4121, the upper bypass hole 425 is arranged between the main through hole 424 and the first mounting hole 500, the bypass flow passage 412 is arranged between the second mounting hole 510 and the coil groove 520, and the upper bypass hole 425, the inclined avoidance passage 4121, the bypass flow passage 412 and the lower bypass flow passage 4210 are sequentially communicated to form a bypass passage. The upper and lower parts of the piston housing 400 may be turned by a turn-up machine to fix the upper piston press 420, the magnetic core 410, and the lower piston press 421 into the piston housing 400. The magnetorheological fluid can circulate through the main channel and the bypass channel respectively. The bypass flow passage 412 is arranged in the magnetic core 410, the upper part of the bypass flow passage 412 is provided with the inclined avoidance passage 4121, the inclined avoidance passage 4121 can avoid the second installation hole 510 and the coil groove 520, the upper bypass hole 425 is arranged between the main through hole 424 and the first installation hole 500, the upper bypass hole 425, the inclined avoidance passage 4121, the bypass flow passage 412 and the lower bypass hole 4210 are sequentially communicated to form a bypass passage, and the volumes of the upper piston pressure plate 420 and the magnetic core 410 can be reduced under the condition that the structural strength of the upper piston pressure plate 420 and the magnetic core 410 is ensured, so that the volume of the piston assembly is reduced.
In one embodiment, the upper piston platen 420 and the magnetic core 410 are provided with first positioning holes 426, and the first positioning holes 426 are used to assist the alignment of the upper bypass holes 425 with the inclined avoidance channel 4121. In assembly, since the inclined avoidance channel 4121 is inclined, the port of the inclined avoidance channel 4121 needs to be aligned with the upper bypass hole 425, and therefore, the upper piston pressing plate 420 and the magnetic core 410 are provided with the first positioning holes 426 for assisting in aligning the positions of the upper bypass hole 425 and the inclined avoidance channel 4121. The first positioning hole 426 of the upper piston pressing plate 420 is a through hole, and penetrates through the upper surface and the lower surface of the upper piston pressing plate 420; the first positioning hole 426 on the magnetic core 410 is a blind hole, and when assembling, the auxiliary positioning can be performed through a shaft pin, the shaft pin penetrates through the first positioning hole 426 of the upper piston pressing plate 420, and then is inserted into the first positioning hole 426 of the magnetic core 410, and at this time, the positions of the upper bypass hole 425 and the inclined avoidance channel 4121 are just aligned.
In one embodiment, the lower piston platen 421 and the magnetic core 410 are provided with second positioning holes for assisting in aligning the positions of the lower bypass hole 4210 and the bypass flow passage 412. The second positioning hole (not shown) on the lower piston pressing plate 421 is a through hole, penetrates through the upper surface and the lower surface of the lower piston pressing plate 421, and the second positioning hole on the magnetic core 410 is a blind hole, and when the assembly is performed, the auxiliary positioning can be performed through a shaft pin, the shaft pin penetrates through the second positioning hole of the lower piston pressing plate 421, and then is inserted into the second positioning hole of the magnetic core 410, and at this time, the position of the lower bypass hole 4210 and the position of the bypass flow passage 412 are just aligned.
In one embodiment, the piston housing 400, the magnetic core 410, the upper piston press 420, the lower piston press 421, the first mounting hole 500, and the second mounting hole 510 are all coaxially disposed. In order to improve coaxiality, the piston housing 400, the magnetic core 410, the upper piston press 420, the lower piston press 421, the first mounting hole 500, and the second mounting hole 510 are all coaxially disposed.
In one embodiment, the bypass flow passage 412 is disposed vertically as a whole, and the inclined avoiding passage 4121 is disposed obliquely from top left to bottom right. The bypass flow passage 412 is vertically arranged as a whole, and processing is convenient. The inclined avoidance channel 4121 is obliquely arranged from top left to bottom right, the inclined avoidance channel 4121 can avoid the second mounting hole 510 and the coil groove 520, if the inclined avoidance channel 4121 is not arranged, the bypass flow channel 412 is all vertically arranged, because the positions of the upper bypass hole 425 and the inclined avoidance channel 4121 need to be aligned, the positions of the upper bypass hole 425 are also limited, because the upper piston pressing plate 420 is respectively provided with the first mounting hole 500 and the main through hole 424, the positions of the upper bypass hole 425 are limited, the first mounting hole 500 or the main through hole 424 can be interfered, in order to avoid the interference, the cross sectional areas of the upper piston pressing plate 420 and the magnetic core 410 can only be increased, and under the condition that the heights of the upper piston pressing plate 420 and the magnetic core 410 are unchanged, the volumes of the upper piston pressing plate 420 and the magnetic core 410 are correspondingly increased, so that the volume of the piston assembly is increased. The inclined escape passage 4121 is inclined from the upper left to the lower right, so that the upper bypass hole 425 may escape from interfering with the first installation hole 500 or the main through hole 424.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (5)
1. The piston assembly of the shock absorber is characterized by comprising a piston shell, a magnetic core, an upper piston pressing plate and a lower piston pressing plate, wherein the upper piston pressing plate, the magnetic core and the lower piston pressing plate are sleeved in the piston shell from top to bottom, and the upper piston pressing plate and the lower piston pressing plate are respectively used for fixing the magnetic core in the piston shell; the upper piston pressing plate and the lower piston pressing plate are respectively provided with a main through hole, a main circulation channel is formed by a gap between the outer wall of the magnetic core and the inner wall of the piston shell, and the main through holes are communicated with the main circulation channel to form a main channel; the magnetic core is characterized in that a first mounting hole and a second mounting hole for mounting a piston rod are respectively formed in the upper piston pressing plate and the magnetic core, a coil groove is formed in the peripheral wall of the magnetic core, an upper bypass hole and a lower bypass hole are respectively formed in the upper piston pressing plate and the lower piston pressing plate, a bypass flow passage is arranged in the magnetic core, the upper part of the bypass flow passage is inclined to avoid a passage, the upper bypass hole is formed between the main through hole and the first mounting hole, the bypass flow passage is formed between the second mounting hole and the coil groove, and the upper bypass hole, the inclined to avoid a passage, the bypass flow passage and the lower bypass hole are sequentially communicated to form a bypass passage.
2. The piston assembly of claim 1, wherein the upper piston platen and the magnetic core are each provided with a first positioning hole for assisting in aligning the upper bypass hole with the position of the inclined bypass passage.
3. The piston assembly of claim 2, wherein the lower piston platen and the magnetic core are each provided with a second locating hole for assisting in aligning the position of the lower bypass hole with the bypass flow passage.
4. The piston assembly of a shock absorber as set forth in claim 1 wherein said piston housing, said magnetic core, said upper piston press plate, said lower piston press plate, said first mounting hole and said second mounting hole are all coaxially disposed.
5. The piston assembly of the shock absorber as set forth in claim 4 wherein said bypass flow passage is generally vertically disposed and said tilt bypass passage is disposed at an incline from top left to bottom right.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322709794.6U CN221170542U (en) | 2023-10-09 | 2023-10-09 | Piston assembly of shock absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322709794.6U CN221170542U (en) | 2023-10-09 | 2023-10-09 | Piston assembly of shock absorber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221170542U true CN221170542U (en) | 2024-06-18 |
Family
ID=91458918
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322709794.6U Active CN221170542U (en) | 2023-10-09 | 2023-10-09 | Piston assembly of shock absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221170542U (en) |
-
2023
- 2023-10-09 CN CN202322709794.6U patent/CN221170542U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant |