CN103267134A - Plug-in mounting type electromagnetic valve and plug-in mounting type electromagnetic valve set using plug-in mounting type electromagnetic valve - Google Patents
Plug-in mounting type electromagnetic valve and plug-in mounting type electromagnetic valve set using plug-in mounting type electromagnetic valve Download PDFInfo
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- CN103267134A CN103267134A CN2013101959069A CN201310195906A CN103267134A CN 103267134 A CN103267134 A CN 103267134A CN 2013101959069 A CN2013101959069 A CN 2013101959069A CN 201310195906 A CN201310195906 A CN 201310195906A CN 103267134 A CN103267134 A CN 103267134A
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Abstract
The invention relates to a plug-in mounting type electromagnetic valve and a plug-in mounting type electromagnetic valve set using the plug-in mounting type electromagnetic valve. The plug-in mounting type electromagnetic valve comprises an electromagnet assembly and a valve element assembly. The electromagnet assembly comprises a coil rack, a movable iron core and a push rod, wherein a push rod guide hole which is used for enabling the push rod to penetrate in a guided mode is formed in the coil rack. The valve element assembly comprises a valve sleeve and a valve element, wherein the push rod is matched with the valve element in a pushing mode, the lower end hole edge of the push rod guide hole is matched with the valve element in a blocking mode to limit the upward movement limitation of the valve element, an oil passing gap is formed between the peripheral surface of the push rod and the hole wall of the push rod guide hole, the lower end hole edge of the push rod guide hole is matched with the upper end face of the valve element in the blocking mode to limit the upward movement limitation of the valve element, an oil passing groove is formed in the upper end face of the valve element, the peripheral surface of the valve element and the push rod guide hole are communicated through the oil passing groove, an annular oil passing cavity is arranged between the valve element and the hole wall of a valve sleeve mounting hole, and the oil passing groove and a valve element oil duct are communicated through the annular oil passing cavity. The plug-in mounting type electromagnetic valve and the plug-in mounting type electromagnetic valve set using the plug-in mounting type electromagnetic valve solve the problem that in the prior art, the structural strength of the push rod is reduced due to the fact that an oil passing channel needs to be arranged inside the push rod.
Description
Technical field
The present invention relates to the solenoid valve field, relate in particular to a kind of plugged electric magnet valve and use the plugged electric magnet valve group of this solenoid valve.
Background technique
In the various hydraulic systems of machinery, two-position three way high pressure, no leakage fluid hydraulic circuit have been widely applied, wherein two-position three way plugged electric magnet valve is the crucial hydraulic element of this type systematic, and the quality of plug-in type magnetic valve performance directly affects the performance of main frame.Existing plug-in type electromagnetic valve structure such as Chinese patent CN202017791U disclosed " thread cartridge formula two-position three way cone valve type solenoid valve ", this solenoid valve comprises electromagnet assembly and mangetic core assembly, electromagnet assembly comprises the coil carrier that electromagnetic coil is installed, mangetic core assembly comprises the valve pocket in the valve pocket mounting hole that is connected in the coil carrier lower end, be provided with the moving iron core that under the active force of electromagnetic coil drives, can move down in the coil carrier, be provided with spool moving up and down in the endoporus of valve pocket, be provided with the spool oil duct in the spool, on the coil carrier in the lower end of moving iron core the mobile push rod that is equipped with of guiding along the vertical direction also, the upper end of push rod and moving iron core lower end are in transmission connection, lower end and the spool of push rod are in transmission connection, moving iron core can promote spool by push rod and move down, and is top-loaded with between valve pocket and the spool and forces the Returnning spring that moves on the spool.Be arranged at intervals with first, second, and third hydraulic fluid port on the valve pocket along the vertical direction, spool has shutoff the 3rd hydraulic fluid port in the process of moving up and down, be communicated with first, second hydraulic fluid port on working position and shutoff first hydraulic fluid port, be communicated with the following working position of second, third hydraulic fluid port.When the electromagnetic coil no electric circuit, be subjected to action of reset spring power, spool is in working position, and the 3rd oilhole is by the spool shutoff at this moment, and first, second hydraulic fluid port is communicated with; When electromagnetic coil was switched on, the electromagnetic force of electromagnetic coil generation promoted moving iron core and moves down, and moving iron core drives spool by push rod and is displaced downwardly to down working position, and first hydraulic fluid port is by shutoff at this moment, and second, third hydraulic fluid port is communicated with.The problem that existing this solenoid valve mainly exists is: owing to want frequent power on/off magnet valve, cause the use of Returnning spring comparatively frequent, and Returnning spring is after frequent the use, can cause Returnning spring not enough to the reposition force that spool provides, make spool not move to working position smoothly, influence the use of solenoid valve; In addition, moving iron core moves down Shi Douhui at every turn and coil carrier produces strong bump, and is bigger to moving iron core damage, the working life of having reduced moving iron core; Offer the endoporus of connection valve pocket and the oily passage of mistake of moving iron core space in the push rod, crossing arranging of oily passage has increased the complex structure of push rod degree, has also reduced the structural strength of push rod simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of plugged electric magnet valve, to solve in the prior art because the problem that oily passage reduces pusher structure intensity need be set in push rod inside; The present invention also aims to provide a kind of plugged electric magnet valve group of using this plugged electric magnet valve.
In order to address the above problem, the technological scheme of plugged electric magnet valve is among the present invention:
The plugged electric magnet valve, comprise the mangetic core assembly that electromagnet assembly and lower end thereof arrange, electromagnet assembly comprises coil carrier and the mobile moving iron core that is assemblied in the coil carrier that leads along the vertical direction, the lower end of moving iron core is connected with push rod, coil carrier is provided with the push rod pilot hole that installs for described push rod guiding, mangetic core assembly comprises the valve pocket in the valve pocket mounting hole that is connected in the coil carrier lower end, be provided with the spool of spool oil duct in guiding is equipped with in the valve pocket, the lower end of described push rod cooperates with the upper end pushing tow of spool, the following stomidium of described push rod pilot hole is continued to use and is limited the spool limit that moves up in cooperating with the upper-end surface block of described spool, be provided with the oil-gap of crossing that is communicated with the space of moving iron core between the hole wall of the outer circumferential face of push rod and push rod pilot hole, the upper-end surface of described spool is provided with the oil groove of crossing that is communicated with described spool outer circumferential face and push rod pilot hole, is provided with the annular that is communicated with described oil groove excessively and spool oil duct between the hole wall of described spool and valve pocket mounting hole and crosses oil pocket.
The described spirality that is shaped as of crossing oil groove.
Be arranged at intervals with first, second, and third hydraulic fluid port on the described valve pocket along the vertical direction, be top-loaded with between valve pocket and the spool to force and move on the spool and make spool shutoff the 3rd hydraulic fluid port, be communicated with the Returnning spring of first, second hydraulic fluid port, pad is equipped with the adjusting pad between described Returnning spring and the spool and/or between the Returnning spring valve pocket.
Turning up on the described spool has spring first installation to turn edge, install to turn in the below that turns edge in described spring first on the described valve pocket and with spring first spring second that is oppositely arranged of turning edge is installed and is installed and turn edge, described Returnning spring is arranged between first and second installation of spring turns edge.
The upper end of described coil carrier is provided with the iron core lid, and iron core covers the double-screw bolt that the axis that is threaded extends along the vertical direction, and the upper end of double-screw bolt protrudes from the iron core lid and is installed with sealing nut.
Offer the oily passage of axial mistake that runs through the moving upper and lower end face of iron core vertically on the described moving iron core.
The technological scheme of plugged electric magnet valve group is among the present invention:
Plugged electric magnet valve group, comprise and be fitted with the electromagnetism valve housing, solenoid valve comprises the mangetic core assembly that electromagnet assembly and lower end thereof arrange, electromagnet assembly comprises coil carrier and the mobile moving iron core that is assemblied in the coil carrier that leads along the vertical direction, the lower end of moving iron core is connected with push rod, coil carrier is provided with the push rod pilot hole that installs for described push rod guiding, mangetic core assembly comprises the valve pocket in the valve pocket mounting hole that is connected in the coil carrier lower end, be provided with the spool of spool oil duct in guiding is equipped with in the valve pocket, the lower end of described push rod cooperates with the upper end pushing tow of spool, the following stomidium of described push rod pilot hole is continued to use and is limited the spool limit that moves up in cooperating with the upper-end surface block of described spool, be provided with the oil-gap of crossing that is communicated with the space of moving iron core between the hole wall of the outer circumferential face of push rod and push rod pilot hole, the upper-end surface of described spool is provided with the oil groove of crossing that is communicated with described spool outer circumferential face and push rod pilot hole, is provided with the annular that is communicated with described oil groove excessively and spool oil duct between the hole wall of described spool and valve pocket mounting hole and crosses oil pocket.
The described spirality that is shaped as of crossing oil groove.
The upper end of described coil carrier is provided with the iron core lid, and iron core covers the double-screw bolt that the axis that is threaded extends along the vertical direction, and the upper end of double-screw bolt protrudes from the iron core lid and is installed with sealing nut.
Described solenoid valve has at least two, be arranged at intervals with first, second, and third hydraulic fluid port on the valve pocket of described mangetic core assembly along the vertical direction, be top-loaded with between valve pocket and the spool to force and move on the spool and make spool shutoff the 3rd hydraulic fluid port, be communicated with the Returnning spring of first, second hydraulic fluid port, fill up between described Returnning spring and the spool and/or between the Returnning spring valve pocket adjusting pad is housed, first hydraulic fluid port of each solenoid valve is communicated with by first asphalt channel that is arranged on the housing, and the 3rd hydraulic fluid port of each solenoid valve is communicated with by second asphalt channel that is arranged on the housing.
Beneficial effect of the present invention is: during use hydraulic oil through spool oil duct, annular cross oil pocket, the oil-gap of crossing between oil groove and push rod and the push rod pilot hole of crossing that is arranged at the spool upper-end surface flows in the space that moves the iron core place, thereby moving iron core is lubricated, make the iron core motion more steady, oily passage need be set in push rod, push rod is easy to make, also guaranteed the structural strength of push rod, cross simultaneously on the upper-end surface that oil groove is arranged at spool, it is also very little to the influence of valve core structure intensity to cross oil groove, guarantees that spool also has enough structural strengths.
Description of drawings
Fig. 1 is the structural representation of an embodiment of plugged electric magnet valve group among the present invention;
Fig. 2 is the structural representation of plugged electric magnet valve among Fig. 1.
Embodiment
The embodiment of plugged electric magnet valve group is shown in Fig. 1 ~ 2: comprise the housing that is fitted with two plugged electric magnet valves 27, each plugged electric magnet valve includes electromagnet assembly and mangetic core assembly, electromagnet assembly comprises the coil carrier 8 that electromagnetic coil 10 is installed, coil carrier is provided with the moving iron core 13 that can move down under the active force of electromagnetic coil, the underpart of moving iron core is a cone boss structure, it is adaptive that electromagnet assembly is provided with the underpart of shape and described moving iron core, and for the identical cone tank that inserts in the underpart of moving iron core, conical surface electromagnet air gap is formed in the underpart of cone tank and moving iron core, initial suction is big, pull characteristics are mild in whole stroke, and moving iron core is to the bump of coil carrier in the time of also can reducing end of travel.The two ends up and down of electromagnetic coil seal with outside the realization by sealing gasket 15 and seal ring 9 respectively, sealing gasket compresses by compressing tablet 16, back-up ring 17 is installed in the mounting groove in the plug 18, and the outer race of electromagnetic coil is provided with electromagnet housing 12, and electromagnet housing and coil carrier interference fit are also fixing.The upper end of coil carrier is equipped with magnetic conduction pad 14, and it cooperates with electromagnet housing 12, is used to form magnetic loop.The upper end of coil carrier is provided with the iron core lid, and iron core covers the double-screw bolt 20 that the axis that is threaded extends along the vertical direction, and the upper end of double-screw bolt protrudes from the iron core lid and is installed with sealing nut 19, and double-screw bolt can be adjusted the position up and down, thereby adjusts the stroke of moving iron core.The lower end interference of moving iron core is installed with push rod 11, push rod leads along the vertical direction and is installed in the push rod pilot hole that is arranged on the coil carrier, the upper end of push rod pilot hole is communicated with the space of moving iron core, is provided with oil-gap between the hole wall of the outer circumferential face of push rod and push rod pilot hole.Mangetic core assembly comprises the valve pocket 2 in the valve pocket mounting hole that is connected in the coil carrier lower end, lead along the vertical direction in the endoporus of valve pocket and be coated with spool 4, be provided with the spool oil duct in the spool, the upper end of spool is used for cooperating with the lower end pushing tow of push rod, be arranged at intervals with first hydraulic fluid port 32 on the valve pocket along the vertical direction, second hydraulic fluid port 34 and the 3rd hydraulic fluid port 37, be arranged at intervals with annular boss 33 on the valve pocket on the inner hole wall of valve pocket along the vertical direction, annular boss 38 under annular boss 35 and the valve pocket in the valve pocket, wherein annular boss is positioned at first on the valve pocket, between second hydraulic fluid port, annular boss is positioned at second in the valve pocket, between the 3rd hydraulic fluid port, annular boss is positioned at the below of the 3rd hydraulic fluid port under the valve pocket, be arranged at intervals with along the vertical direction on the outer circumferential face of spool for spool that annular boss slipper seal on the valve pocket cooperates on annular boss 31, be used for spool that the slipper seal of valve pocket annular boss cooperates in annular boss 36 and for spool that annular boss slipper seal under the valve pocket cooperates under annular boss, on the spool, in, be provided with the multi-turn balancing slit on the outer circumferential face of following annular boss, first hydraulic fluid port of each plugged electric magnet valve is communicated with by first asphalt channel 41 that is arranged on the housing, the 3rd hydraulic fluid port of each plugged electric magnet valve is communicated with by second asphalt channel 42 that is arranged on the housing, housing is provided with respectively with first, the hydraulic fluid port of the second and the 3rd hydraulic fluid port correspondence, housing is provided with two filler openings and return opening, and obsolete hydraulic fluid port can cooperate close screw plug seal ring 26 shutoff by screw plug 25 on the housing.Turning up on the spool has spring first installation to turn edge 40, install to turn in the below that turns edge in described spring first on the valve pocket and with spring first spring second that is oppositely arranged of turning edge is installed and is installed and turn edge 39, be provided with Returnning spring 7 between first and second installation of spring turns edge, pad was equipped with and regulates pad 23 between Returnning spring and spring second were installed and turned edge.Be equipped with second between valve pocket and the coil carrier and regulate pad 43.By two two-position three way plugged electric magnet valves are composed in parallel the solenoid valve group, can realize four four-way functions.Crossing oil groove is that spirality can play the kinetic damping effect, reduces moving iron core motion to the impact of coil carrier, to the impact of coil carrier end face, makes the product commutation steadily when reducing the spool commutation simultaneously, reduces compression shock.
When electromagnetic coil was switched on, moving iron core can drive spool by push rod and move down; Spool has shutoff the 3rd hydraulic fluid port in the process of moving up and down, be communicated with first, second hydraulic fluid port on working position and shutoff first hydraulic fluid port, be communicated with the following working position of second, third hydraulic fluid port.When the electromagnetic coil no electric circuit, be subjected to action of reset spring power and the power of surging, spool is in working position, and the 3rd oilhole is by the spool shutoff at this moment, and first, second hydraulic fluid port is communicated with; When electromagnetic coil was switched on, the electromagnetic force that electromagnetic coil produces promoted moving iron core and moves down, and moving iron core drives spool by push rod and is displaced downwardly to down working position, this moment first hydraulic fluid port by shutoff, second, the hydraulic fluid port connection.The following stomidium of push rod pilot hole is continued to use and is limited the spool limit that moves up in cooperating with spool upper-end surface block, the upper-end surface 30 of spool is provided with the oil groove of crossing that is communicated with described spool outer circumferential face and push rod pilot hole, crossing oil groove is spiral slot, spirality is crossed oil groove can make more steady that hydraulic oil flows, be provided with connecting valve core oil road between the hole wall of spool and valve pocket mounting hole and cross oil pocket with the annular of crossing oil groove, offer on the moving iron core and run through vertically on the moving iron core, the oily passage of axial mistake of lower end surface, hydraulic oil is crossed oil pocket through annular from the spool oil duct, cross oil groove, crossing oil-gap flow in the space that moves iron core, can be lubricated and cool off moving iron core, the damping function of oil has also alleviated reversing impact and noise, make push rod be subjected to frictional force little, long service life, crossing oil groove is opened on the spool upper-end surface, processing is simple, also can not influence the structural strength of spool and push rod simultaneously.The quick attachment plug of part 22 expression waterproof among the figure; Part 21 expression cables; Part 1,3,5,6,9 is all represented seal ring.
Be arranged at balancing slit on the spool hydraulic card clamping force can reduce valve core movement the time, make the solenoid valve commutation steadily; Returnning spring is selected high-quality carbon spring steel wires long service life for use.In other embodiments of the invention: the number of regulating pad can be selected as required, such as two, three or more; Regulate pad can also fill up be contained in Returnning spring and spring first install turn edge between or fill up simultaneously and be contained between Returnning spring and first and second installation of spring turn edge; Spring second is installed to turn edge and also can not established, and this moment, Returnning spring can directly push up on the upper-end surface that is contained in valve pocket; The shape of crossing oil groove that is arranged at the spool upper-end surface also can be the radial radiation shape; The number that is arranged at the balancing slit on each spool annular boss can also be one, two or other number, and balancing slit can not established yet certainly; The end, lower end of moving iron core can also be a bearing of trend perpendicular to the plane structure of above-below direction, can not fixedlying connected with moving iron core in the upper end of push rod, but cooperates with moving iron core lower end pushing tow yet; The number of plugged electric magnet valve can also be one, three, four or more.
The embodiment of plugged electric magnet valve is as shown in Figure 2: the concrete structure of plugged electric magnet valve is identical with the plugged electric magnet valve described in above-mentioned each plugged electric magnet valve group embodiment, is not described in detail in this.
Claims (10)
1. plugged electric magnet valve, comprise the mangetic core assembly that electromagnet assembly and lower end thereof arrange, electromagnet assembly comprises coil carrier and the mobile moving iron core that is assemblied in the coil carrier that leads along the vertical direction, the lower end of moving iron core is connected with push rod, coil carrier is provided with the push rod pilot hole that installs for described push rod guiding, mangetic core assembly comprises the valve pocket in the valve pocket mounting hole that is connected in the coil carrier lower end, be provided with the spool of spool oil duct in guiding is equipped with in the valve pocket, it is characterized in that: the lower end of described push rod cooperates with the upper end pushing tow of spool, the following stomidium of described push rod pilot hole is continued to use and is limited the spool limit that moves up in cooperating with the upper-end surface block of described spool, be provided with the oil-gap of crossing that is communicated with the space of moving iron core between the hole wall of the outer circumferential face of push rod and push rod pilot hole, the upper-end surface of described spool is provided with the oil groove of crossing that is communicated with described spool outer circumferential face and push rod pilot hole, is provided with the annular that is communicated with described oil groove excessively and spool oil duct between the hole wall of described spool and valve pocket mounting hole and crosses oil pocket.
2. plugged electric magnet valve according to claim 1 is characterized in that: the described spirality that is shaped as of crossing oil groove.
3. plugged electric magnet valve according to claim 1, it is characterized in that: be arranged at intervals with first, second, and third hydraulic fluid port on the described valve pocket along the vertical direction, be top-loaded with between valve pocket and the spool to force and move on the spool and make spool shutoff the 3rd hydraulic fluid port, be communicated with the Returnning spring of first, second hydraulic fluid port, pad is equipped with the adjusting pad between described Returnning spring and the spool and/or between the Returnning spring valve pocket.
4. plugged electric magnet valve according to claim 3, it is characterized in that: turning up on the described spool has spring first installation to turn edge, install to turn in the below that turns edge in described spring first on the described valve pocket and with spring first spring second that is oppositely arranged of turning edge is installed and is installed and turn edge, described Returnning spring is arranged between first and second installation of spring turns edge.
5. plugged electric magnet valve according to claim 1 is characterized in that: the upper end of described coil carrier is provided with the iron core lid, and iron core covers the double-screw bolt that the axis that is threaded extends along the vertical direction, and the upper end of double-screw bolt protrudes from the iron core lid and is installed with sealing nut.
6. according to any described plugged electric magnet valve of claim 1 ~ 5, it is characterized in that: offer the oily passage of axial mistake that runs through the moving upper and lower end face of iron core vertically on the described moving iron core.
7. plugged electric magnet valve group, comprise and be fitted with the electromagnetism valve housing, solenoid valve comprises the mangetic core assembly that electromagnet assembly and lower end thereof arrange, electromagnet assembly comprises coil carrier and the mobile moving iron core that is assemblied in the coil carrier that leads along the vertical direction, the lower end of moving iron core is connected with push rod, coil carrier is provided with the push rod pilot hole that installs for described push rod guiding, mangetic core assembly comprises the valve pocket in the valve pocket mounting hole that is connected in the coil carrier lower end, be provided with the spool of spool oil duct in guiding is equipped with in the valve pocket, it is characterized in that: the lower end of described push rod cooperates with the upper end pushing tow of spool, the following stomidium of described push rod pilot hole is continued to use and is limited the spool limit that moves up in cooperating with the upper-end surface block of described spool, be provided with the oil-gap of crossing that is communicated with the space of moving iron core between the hole wall of the outer circumferential face of push rod and push rod pilot hole, the upper-end surface of described spool is provided with the oil groove of crossing that is communicated with described spool outer circumferential face and push rod pilot hole, is provided with the annular that is communicated with described oil groove excessively and spool oil duct between the hole wall of described spool and valve pocket mounting hole and crosses oil pocket.
8. plugged electric magnet valve group according to claim 7 is characterized in that: the described spirality that is shaped as of crossing oil groove.
9. plugged electric magnet valve group according to claim 7, it is characterized in that: the upper end of described coil carrier is provided with the iron core lid, iron core covers the double-screw bolt that the axis that is threaded extends along the vertical direction, and the upper end of double-screw bolt protrudes from the iron core lid and is installed with sealing nut.
10. according to any described plugged electric magnet valve group of claim 7 ~ 9, it is characterized in that: described solenoid valve has at least two, be arranged at intervals with first along the vertical direction on the valve pocket of described mangetic core assembly, the second and the 3rd hydraulic fluid port, be top-loaded with between valve pocket and the spool to force and move on the spool and make spool shutoff the 3rd hydraulic fluid port, be communicated with first, the Returnning spring of second hydraulic fluid port, fill up between described Returnning spring and the spool and/or between the Returnning spring valve pocket adjusting pad is housed, first hydraulic fluid port of each solenoid valve is communicated with by first asphalt channel that is arranged on the housing, and the 3rd hydraulic fluid port of each solenoid valve is communicated with by second asphalt channel that is arranged on the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310195906.9A CN103267134B (en) | 2013-05-24 | 2013-05-24 | Plug-in mounting type electromagnetic valve and plug-in mounting type electromagnetic valve set using plug-in mounting type electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310195906.9A CN103267134B (en) | 2013-05-24 | 2013-05-24 | Plug-in mounting type electromagnetic valve and plug-in mounting type electromagnetic valve set using plug-in mounting type electromagnetic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103267134A true CN103267134A (en) | 2013-08-28 |
| CN103267134B CN103267134B (en) | 2015-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310195906.9A Expired - Fee Related CN103267134B (en) | 2013-05-24 | 2013-05-24 | Plug-in mounting type electromagnetic valve and plug-in mounting type electromagnetic valve set using plug-in mounting type electromagnetic valve |
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| CN (1) | CN103267134B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108501920A (en) * | 2018-04-02 | 2018-09-07 | 武汉欧拓莫科技有限公司 | A kind of air-pressure type electronic parking braking system |
| CN111503282A (en) * | 2020-05-11 | 2020-08-07 | 湖北航达科技有限公司 | Small-volume high-frequency-response plug-in type electromagnetic valve and using method thereof |
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|---|---|---|---|---|
| US4250922A (en) * | 1978-05-24 | 1981-02-17 | Robert Bosch Gmbh | Electromagnetically operated control valve |
| US4838518A (en) * | 1987-05-28 | 1989-06-13 | Aisin An Co., Ltd. | Pressure control valve |
| US4905961A (en) * | 1988-04-18 | 1990-03-06 | Diesel Kiki Co., Ltd. | Electromagnetic actuator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108501920A (en) * | 2018-04-02 | 2018-09-07 | 武汉欧拓莫科技有限公司 | A kind of air-pressure type electronic parking braking system |
| CN111503282A (en) * | 2020-05-11 | 2020-08-07 | 湖北航达科技有限公司 | Small-volume high-frequency-response plug-in type electromagnetic valve and using method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103267134B (en) | 2015-07-01 |
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