CN115023560A - Hydraulic actuator and hydraulic clutch actuator with magnetic filter - Google Patents
Hydraulic actuator and hydraulic clutch actuator with magnetic filter Download PDFInfo
- Publication number
- CN115023560A CN115023560A CN202080094823.9A CN202080094823A CN115023560A CN 115023560 A CN115023560 A CN 115023560A CN 202080094823 A CN202080094823 A CN 202080094823A CN 115023560 A CN115023560 A CN 115023560A
- Authority
- CN
- China
- Prior art keywords
- cylinder
- housing
- magnetic filter
- hydraulic
- hydraulic actuator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000002923 metal particle Substances 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 7
- 230000000274 adsorptive effect Effects 0.000 claims abstract description 5
- 239000013013 elastic material Substances 0.000 claims description 3
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 239000013536 elastomeric material Substances 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/06—Details
- F15B7/08—Input units; Master units
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/12—Details not specific to one of the before-mentioned types
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D29/00—Clutches and systems of clutches involving both fluid and magnetic actuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D29/00—Clutches and systems of clutches involving both fluid and magnetic actuation
- F16D29/005—Clutches and systems of clutches involving both fluid and magnetic actuation with a fluid pressure piston driven by an electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D25/00—Fluid-actuated clutches
- F16D25/08—Fluid-actuated clutches with fluid-actuated member not rotating with a clutching member
- F16D2025/081—Hydraulic devices that initiate movement of pistons in slave cylinders for actuating clutches, i.e. master cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2125/00—Components of actuators
- F16D2125/02—Fluid-pressure mechanisms
- F16D2125/08—Seals, e.g. piston seals
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A hydraulic actuator having a magnetic filter comprising: a housing (1) for containing a liquid; a cylinder (2) formed on or mounted to the housing (1); a piston rod (3) which extends at least partially into the housing (1); a piston (4) mounted to one axial end of the piston rod (3) and reciprocally movable in the cylinder (2); and a magnetic filter (5) mounted to a first end (21) of the cylinder (2) within the housing (1) for adsorptive filtration of metal particles in the liquid. A hydraulic clutch actuator is also provided.
Description
The present application relates to hydraulic actuators, and more particularly, to a hydraulic actuator and hydraulic clutch actuator having a magnetic filter.
Hydraulic actuators are widely used in automobiles, such as in transmission systems, brake systems, and the like. Currently, some hydraulic actuators operate with metal transmission components (e.g., ball screws, planetary roller screws, gears, etc.) that are immersed in a fluid (e.g., brake fluid, automatic transmission fluid). Over time, metal parts can wear to produce metal particles. These metal particles enter the hydraulic system and cannot escape from the hydraulic system, possibly accelerating seal wear or causing leakage.
Disclosure of Invention
It is an object of the present application to overcome or at least alleviate the above-mentioned deficiencies of the prior art and to provide a hydraulic actuator and hydraulic clutch actuator having a magnetic filter.
There is provided a hydraulic actuator having a magnetic filter, comprising:
a housing for containing a liquid;
a cylinder formed on or mounted to the housing;
a piston rod extending at least partially into the housing;
a piston mounted to one axial end of the piston rod and reciprocally movable in the cylinder; and
a magnetic filter mounted to a first end of the cylinder within the housing for adsorptive filtration of metal particles in the liquid.
In at least one embodiment, the first end of the cylinder is provided with a plurality of fitting grooves, and the magnetic filter includes a plurality of magnetic sheet members fitted into the plurality of fitting grooves in a one-to-one correspondence; alternatively, the first and second electrodes may be,
the magnetic filter is of an annular structure, the first end of the cylinder body is provided with an assembling groove, and the annular magnetic filter is assembled in the assembling groove.
In at least one embodiment, the magnetic sheet member or the annular magnetic filter is fitted into the fitting groove in a connection manner of any combination of interference fit, adhesive connection, bayonet structure connection, and mortise and tenon structure connection.
In at least one embodiment, the magnetic sheet member or the magnetic filter in the ring shape partially protrudes or protrudes from the fitting groove.
In at least one embodiment, the magnetic sheet member or the annular magnetic filter protrudes from the first end of the cylinder in an axial direction of the cylinder.
In at least one embodiment, the plurality of magnetic sheet members are arranged at intervals in a circumferential direction of the first end of the cylinder.
In at least one embodiment, the first end of the cylinder includes a plurality of air-bleed makeup grooves spaced circumferentially around the first end, the plurality of air-bleed makeup grooves dividing the first end into a plurality of segments, one of the magnetic sheet members being disposed on each of the segments.
In at least one embodiment, the piston includes a seal made of an elastomeric material.
A hydraulic clutch actuator is provided, comprising:
a housing for containing a liquid;
a cylinder formed on or mounted to the housing;
a piston rod extending at least partially into the housing;
a piston mounted to one axial end of the piston rod and reciprocally movable in the cylinder to establish a pressure in a hydraulic pressure chamber of the cylinder; and
a magnetic filter mounted to a first end of the cylinder within the housing for adsorptive filtration of metal particles in the liquid.
In at least one embodiment, the piston rod is a lead screw and the piston includes a seal made of an elastomeric material.
FIG. 1 illustrates a partial cross-sectional view of a hydraulic actuator according to one embodiment of the present application.
Fig. 2A shows a perspective view of the vicinity of the first end of the cylinder of the hydraulic actuator in fig. 1, in which the magnet pieces are omitted to show the fitting grooves.
Fig. 2B shows a perspective view of the magnet piece of the hydraulic actuator in fig. 1.
FIG. 3 illustrates a perspective view of the hydraulic actuator of FIG. 1 near a first end of a cylinder.
Description of the reference numerals
1 shell and 11 fluid infusion cavities
2 cylinder body, 21 first end, 211 assembling groove, 211A bottom wall, 211B, 211C side wall, 212 exhaust gas replenishing groove, 213 segment, 22 hydraulic cavity, 23 second end, 231 pressure sensor interface and 232 liquid outlet
3 piston rod
4 piston, 41 seal
5 magnetic Filter, 51 magnet sheet
A axial direction.
Exemplary embodiments of the present application are described below with reference to the accompanying drawings.
As shown in fig. 1 to 3, one embodiment of the present application provides a hydraulic actuator having a magnetic filter, including: a housing 1 for containing a liquid such as brake fluid or transmission oil; a cylinder 2 formed on or attached to the housing 1; a piston rod 3 which projects at least partially into the housing 1; a piston 4 mounted to one axial end of the piston rod 3 and capable of reciprocating in the cylinder 2; and a magnetic filter 5 mounted to a first end 21 of the cylinder 2 within the housing 1 for adsorbing metal particles in the filtered liquid.
Referring to fig. 1, the overall structure of the hydraulic actuator will be described first.
The hydraulic actuator may be, for example, a hydraulic clutch actuator. The piston rod 3 may be a lead screw, and the other axial end (left end in fig. 1) thereof may be connected to a motor as a drive source. The piston 4 comprises a seal 41 of elastic material, for example rubber.
The piston 4 defines a hydraulic chamber 22 within the cylinder 2, the piston 4 being adapted to build up pressure in the hydraulic chamber 22 of the cylinder 2. The piston 4 separates the fluid replenishing chamber 11 in the housing 1 from the hydraulic pressure chamber 22 in the cylinder 2. The fluid replenishment chamber 11 may be connected to an external oil can for replenishing fluid lost in the hydraulic actuator or hydraulic system.
The second end 23 of the cylinder 2 is provided with a pressure sensor port 231 and a liquid outlet 232. Pressure sensor interface 231 may mount a pressure sensor to measure the pressure in hydraulic chamber 22 and fluid outlet 232 may be connected to the secondary clutch release cylinder to provide pressurized fluid thereto.
Referring to fig. 1 to 3, the structure associated with the magnetic filter 5 will be described.
The first end 21 of the cylinder block 2 may be provided with a plurality of (e.g., three or four) fitting grooves 211, and the magnetic filter 5 may include a plurality of magnetic sheet members, preferably magnet pieces 51, into which the plurality of magnet pieces 51 are fitted in one-to-one correspondence, in other words, one magnet piece 51 is fitted into each fitting groove 211. The magnetic sheet member may be made of any magnetic material known in the art, such as any known magnetic material containing iron, cobalt, or nickel. Alternatively, the magnet piece 51 may be fitted into the fitting groove 211 by interference.
The magnet pieces 51 may also be bonded into the fitting grooves 211 in consideration of the fragility of the magnet. It will be appreciated that both interference fit and adhesive bonding may be used. Of course, alternatively, other fixing manners, such as a slot structure connection, a mortise and tenon structure connection, and the like, or any combination of the above assembling manners may also be adopted.
The magnetic filter 5 can also be a ring-shaped component, and in fit with the ring-shaped component, a corresponding assembly groove is arranged on the first end 21 of the cylinder body, and the assembly groove can be a continuous ring shape or a plurality of discrete assembly grooves, depending on the connection assembly structure of the ring-shaped magnetic filter and the cylinder body; the continuous or discrete mounting slots cooperate with the annular magnetic filter 5 to secure the magnetic filter 5 at the first end 21. The annular magnetic filter 5 and the assembling groove can be assembled in any combination of interference fit, bonding, clamping groove structure connection, mortise and tenon structure connection and the like.
As shown in fig. 1 and 3, the magnet piece 51 may partially protrude from the fitting groove 211 in the radial direction of the cylinder block 2, which increases the exposed area of the magnet piece, thereby increasing the filtering capability and the amount of metal particles that can be adsorbed.
The magnet piece 51 may protrude from the first end 21 of the cylinder 2 in the axial direction a of the cylinder 2. The radially inner side surfaces of the magnet pieces 51 face the piston 4 or the piston rod 3, so that metal particles near the piston 4 are more easily adsorbed and abrasion of the seal 41 of the piston 4 can be avoided.
The fitting recess 211 may have a bottom wall 211A, two circumferentially opposite side walls 211C, and a side wall 211B facing one axial side (left side in fig. 1). In this way, the magnet piece 51 is facilitated to protrude from the first end 21 of the cylinder 2.
The plurality of magnet pieces 51 may be arranged at intervals in the circumferential direction of the first end 21 of the cylinder 2.
Alternatively, the first end 21 of the cylinder block 2 may include a plurality of exhaust-gas replenishment grooves 212 spaced apart in the circumferential direction of the first end 21, the plurality of exhaust-gas replenishment grooves 212 dividing the first end 21 into a plurality of segments 213, one magnet piece 51 being provided on each segment 213. The exhaust replenishment tank 212 may be used to replenish the hydraulic chamber 22 with liquid from the replenishment chamber 11 without the piston 4 being removed or not completely removed from the cylinder 2. The inner circumferential surface of the distal end of the segment 213 (toward the end of the piston rod 3) may be formed as a slope surface so as to guide the piston 4 into the cylinder 2.
In an illustrative but non-limiting example, the magnet pieces 51 may have a tile-like (bent-sheet-like) structure of about 8mm × 10mm × 4 mm.
As described above, the present application uses the magnet piece 51 as a magnetic filter to collect metal particles in the hydraulic actuator. The magnet pieces are fitted in the fitting grooves 211 of the housing 1 by interference and/or adhesion. In one example, four 90 ° spaced magnet pieces 51 are used.
(i) The metal particles are collected by the magnetic force of the magnet pieces, so that the sealing member can be protected from being damaged and the abrasion of the hydraulic actuator (particularly, the piston 4, the cylinder body 2 and the lead screw as the piston rod 3) can be reduced, thereby improving the reliability of the hydraulic actuator.
(ii) The magnetic filter is divided into pieces that can be easily assembled and cost-effective.
(iii) The sheet magnet having more contact surfaces is advantageous for improving the filtering function.
(iv) The length of the magnet piece may exceed the length of the fitting groove to increase the contact area.
(v) The magnetic filter is fitted to the fitting groove 211 of the cylinder 2 by interference and/or adhesion, and it is possible to ensure that the filter is used in a humid environment for a long time.
The scheme of this application can be used for various hydraulic systems, especially hydraulic actuator and hydraulic clutch actuator.
Of course, the present application is not limited to the above-described embodiments, and those skilled in the art can make various modifications to the above-described embodiments of the present application without departing from the scope of the present application under the teaching of the present application.
Claims (10)
- A hydraulic actuator having a magnetic filter, comprising:a housing (1) for containing a liquid;a cylinder (2) formed on or mounted to the housing (1);a piston rod (3) which extends at least partially into the housing (1);a piston (4) mounted to one axial end of the piston rod (3) and reciprocally movable in the cylinder (2); anda magnetic filter (5) mounted to a first end (21) of the cylinder (2) within the housing (1) for adsorptive filtration of metal particles in the liquid.
- The hydraulic actuator according to claim 1, wherein the first end (21) of the cylinder (2) is provided with a plurality of fitting grooves (211), and the magnetic filter (5) includes a plurality of magnetic sheet members that are fitted into the plurality of fitting grooves (211) in one-to-one correspondence; alternatively, the first and second electrodes may be,the magnetic filter (5) is of an annular structure, the first end (21) of the cylinder body (2) is provided with an assembling groove, and the annular magnetic filter is assembled in the assembling groove.
- The hydraulic actuator according to claim 2, wherein the magnetic sheet member or the annular magnetic filter is fitted into the fitting groove (211) in a connection manner of any combination of interference fit, adhesive connection, bayonet structure connection, and mortise and tenon structure connection.
- The hydraulic actuator according to claim 2, wherein the magnetic sheet member or the annular magnetic filter partially protrudes or protrudes from the fitting recess (211).
- The hydraulic actuator according to claim 2, wherein the cylinder (2) is axially displaced(A) Said magnetic sheet element or said annular magnetic filter projecting from said first end (21) of said cylinder (2).
- The hydraulic actuator according to claim 2, wherein the plurality of magnetic sheet members are arranged at intervals in the circumferential direction of the first end (21) of the cylinder (2).
- The hydraulic actuator according to claim 2, wherein the first end (21) of the cylinder (2) comprises a plurality of exhaust-charge slots (212) spaced apart in the circumferential direction of the first end (21), the plurality of exhaust-charge slots (212) dividing the first end (21) into a plurality of segments (213), one magnetic sheet-like member being provided on each segment (213).
- The hydraulic actuator according to claim 1, wherein the piston (4) comprises a seal (41) of an elastic material.
- A hydraulic clutch actuator, comprising:a housing (1) for containing a liquid;a cylinder (2) formed on or mounted to the housing (1);a piston rod (3) which at least partially protrudes into the housing (1);a piston (4) mounted to an axial end of the piston rod (3) and reciprocally movable in the cylinder (2) to establish a pressure in a hydraulic chamber (22) of the cylinder (2); anda magnetic filter (5) mounted to a first end (21) of the cylinder (2) within the housing (1) for adsorptive filtration of metal particles in the liquid.
- The hydraulic clutch actuator of claim 9,the piston rod (3) is a screw rod,the piston (4) comprises a seal (41) made of an elastic material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2020/081179 WO2021189316A1 (en) | 2020-03-25 | 2020-03-25 | Hydraulic actuator having magnetic filter and hydraulic clutch actuating mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115023560A true CN115023560A (en) | 2022-09-06 |
Family
ID=77890891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080094823.9A Pending CN115023560A (en) | 2020-03-25 | 2020-03-25 | Hydraulic actuator and hydraulic clutch actuator with magnetic filter |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20220143915A (en) |
| CN (1) | CN115023560A (en) |
| DE (1) | DE112020006965T5 (en) |
| WO (1) | WO2021189316A1 (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005009633A (en) * | 2003-06-20 | 2005-01-13 | Tokico Ltd | Electric braking device |
| CN102889264A (en) * | 2012-10-18 | 2013-01-23 | 徐州永佳液压设备有限公司 | Hydraulic cylinder with magnetic control antifriction structure |
| CN203297202U (en) * | 2013-06-19 | 2013-11-20 | 内蒙古大禹节水技术有限公司 | Hydraulic-oil magnetic filter |
| CN107438727A (en) * | 2015-03-30 | 2017-12-05 | 舍弗勒技术股份两合公司 | Actuator with planetary roller screw transmission device (PWG) |
| CN109844343A (en) * | 2016-10-06 | 2019-06-04 | 舍弗勒技术股份两合公司 | Actuator for clutch |
| CN109844342A (en) * | 2016-10-27 | 2019-06-04 | 舍弗勒技术股份两合公司 | Actuator and torque for controlled clutch transmit system |
| CN110900859A (en) * | 2019-12-05 | 2020-03-24 | 晶海洋半导体材料（东海）有限公司 | Diamond wire line cutting machine and magnetic adsorption device thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001263377A (en) * | 2000-03-17 | 2001-09-26 | Unisia Jecs Corp | Electromagnetic and hydraulic clutch |
| CN203857113U (en) * | 2014-05-27 | 2014-10-01 | 上海融德机电工程设备有限公司 | Hydraulic power actuator for screwed valve |
| DE102016219443A1 (en) * | 2016-10-07 | 2018-04-12 | Schaeffler Technologies AG & Co. KG | Hydrostatic actuator with two-part dynamic sealing section |
-
2020
- 2020-03-25 DE DE112020006965.6T patent/DE112020006965T5/en active Pending
- 2020-03-25 WO PCT/CN2020/081179 patent/WO2021189316A1/en active Application Filing
- 2020-03-25 KR KR1020227032590A patent/KR20220143915A/en not_active Application Discontinuation
- 2020-03-25 CN CN202080094823.9A patent/CN115023560A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005009633A (en) * | 2003-06-20 | 2005-01-13 | Tokico Ltd | Electric braking device |
| CN102889264A (en) * | 2012-10-18 | 2013-01-23 | 徐州永佳液压设备有限公司 | Hydraulic cylinder with magnetic control antifriction structure |
| CN203297202U (en) * | 2013-06-19 | 2013-11-20 | 内蒙古大禹节水技术有限公司 | Hydraulic-oil magnetic filter |
| CN107438727A (en) * | 2015-03-30 | 2017-12-05 | 舍弗勒技术股份两合公司 | Actuator with planetary roller screw transmission device (PWG) |
| CN109844343A (en) * | 2016-10-06 | 2019-06-04 | 舍弗勒技术股份两合公司 | Actuator for clutch |
| CN109844342A (en) * | 2016-10-27 | 2019-06-04 | 舍弗勒技术股份两合公司 | Actuator and torque for controlled clutch transmit system |
| CN110900859A (en) * | 2019-12-05 | 2020-03-24 | 晶海洋半导体材料（东海）有限公司 | Diamond wire line cutting machine and magnetic adsorption device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021189316A1 (en) | 2021-09-30 |
| DE112020006965T5 (en) | 2023-01-12 |
| KR20220143915A (en) | 2022-10-25 |
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