CN110886869B - Planetary gear transmission device of rotary valve - Google Patents
Planetary gear transmission device of rotary valve Download PDFInfo
- Publication number
- CN110886869B CN110886869B CN201911241715.5A CN201911241715A CN110886869B CN 110886869 B CN110886869 B CN 110886869B CN 201911241715 A CN201911241715 A CN 201911241715A CN 110886869 B CN110886869 B CN 110886869B
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- rotary valve
- planetary gear
- input shaft
- sleeve
- ratchet mechanism
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K7/00—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves
- F16K7/02—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm
- F16K7/04—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force
- F16K7/06—Diaphragm valves or cut-off apparatus, e.g. with a member deformed, but not moved bodily, to close the passage ; Pinch valves with tubular diaphragm constrictable by external radial force by means of a screw-spindle, cam, or other mechanical means
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- 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
- F16H—GEARING
- F16H1/00—Toothed gearings for conveying rotary motion
- F16H1/28—Toothed gearings for conveying rotary motion with gears having orbital motion
- F16H1/32—Toothed gearings for conveying rotary motion with gears having orbital motion in which the central axis of the gearing lies inside the periphery of an orbital gear
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- 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
- F16H—GEARING
- F16H27/00—Step-by-step mechanisms without freewheel members, e.g. Geneva drives
- F16H27/04—Step-by-step mechanisms without freewheel members, e.g. Geneva drives for converting continuous rotation into a step-by-step rotary movement
- F16H27/06—Mechanisms with driving pins in driven slots, e.g. Geneva drives
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention discloses a planetary gear transmission device of a rotary valve, belonging to the technical field of quantitative analysis equipment; the device comprises a pipe clamping valve seat and a rotary valve seat, wherein the seat body of the rotary valve seat is fixed with the seat body of the pipe clamping valve seat, a planetary gear transmission assembly is arranged in the seat body of the rotary valve seat, and the planetary gear transmission assembly consists of an input shaft, a handle, a sun gear, a limiting ring, an inner ratchet mechanism I, a planetary gear, an inner gear ring, a connecting shaft, a planetary carrier, a limiting head, a pressure plate, a fixing piece, an inner ratchet mechanism II, an output shaft and a driving gear. The planetary gear transmission device of the rotary valve has reasonable structural design, and can be effectively combined with the pinch valve on one hand, so that the planetary gear transmission device has the advantages of the pinch valve and can realize on-off regulation and control flow with a certain amplitude; on the other hand, the device can realize quick closing and slow opening and is well suitable for quantitative analysis equipment.
Description
Technical Field
The invention belongs to the technical field of quantitative analysis equipment, and particularly relates to a planetary gear transmission device of a rotary valve.
Background
Pinch valves are also known as tube pinch valves, air bag valves, pinch-off valves, and the like. The casing is the most important part of any pinch valve, and is the core of the pinch valve, providing corrosion resistance, wear resistance and pressure bearing capability. The quality of the pinch valve depends on the quality of the casing. When the pneumatic pinch valve controls gas not to be input, a cavity between the rubber sleeve and the valve body is communicated with the atmosphere, and the rubber sleeve is in an outward tensioning state under the action of fluid pressure; because the reinforcing cord fabric layers arranged at a certain angle are arranged in the pipe sleeve, the axial pressure and the radial pressure of the pipe sleeve are balanced, so the length and the diameter of the pipe sleeve cannot be changed due to the fluid pressure; when control gas enters a cavity between the pipe sleeve and the valve body, the pipe sleeve deforms and intercepts under the pressure of the control gas; when compressed air enters the valve body of the pneumatic pinch valve, the special inner bushing with high resilience is compressed to generate lip closure, so that the service life of the inner bushing is prolonged to the maximum extent while the medium flow is ensured to be absolutely and reliably shut off; when the compressed air is interrupted, the special lining sleeve is rapidly expanded under the dual actions of the self resilience force and the medium pressure, and then the valve is completely opened. However, the pneumatic pinch valve has the problems that only on-off adjustment can be carried out, and the flow cannot be controlled, so that the pneumatic pinch valve is not suitable for quantitative analysis.
In the prior art, a manual rotary valve is often used for realizing on-off regulation and flow control with a certain amplitude of quantitative analysis equipment, but the rotary valve has the advantages of no pinch valve, has the same opening and closing speed, cannot realize quick closing and slow opening, and cannot be better suitable for the quantitative analysis equipment. Therefore, it is necessary to optimize and improve it.
Disclosure of Invention
The present invention is directed to overcoming the above problems in the prior art and providing a planetary gear transmission for a rotary valve.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a planetary gear transmission device of a rotary valve comprises a pipe clamping valve seat and a rotary valve seat, wherein a seat body of the rotary valve seat is fixed with a seat body of the pipe clamping valve seat, a planetary gear transmission assembly is arranged in the seat body of the rotary valve seat and comprises an input shaft, a handle, a sun wheel, limiting rings, an inner ratchet mechanism I, planet wheels, an inner gear ring, a connecting shaft, a planet carrier, a limiting head, a pressure plate, a fixing piece, an inner ratchet mechanism II, an output shaft and a driving gear, the input shaft is positioned outside the rotary valve seat, the end part of the input shaft is fixed with the handle, two limiting rings are fixed on the outer side of a shaft body positioned in the rotary valve seat body, the sun wheel sleeved on the outer side of the input shaft is arranged between the two limiting rings, the inner ratchet mechanism I is arranged between the sun wheel and the input shaft, a plurality of planet wheels, the planet wheel passes through the link connection and is located the planet frame in the rotatory disk seat body inner chamber, and the inner of input shaft is fixed with the spacing head, and the spacing head rotates the restriction through the pressure disk and goes in the planet frame, and the pressure disk passes through the mounting and is fixed with the planet frame, is equipped with interior ratchet II between pressure disk and the input shaft, and the outer end of planet frame is fixed with the output shaft along the axis, and the output shaft stretches into the tip to pressing from both sides in the pipe disk seat, and the tip is fixed with the drive gear as mechanical drive.
Furthermore, a flow channel is arranged in a base body of the pipe clamping valve seat, the fixing sleeve is arranged, the pipe sleeve is arranged on the inner side of the fixing sleeve, the flow channel for fluid is limited to be the pipe sleeve of the tubular component, the middle of the barrel body of the fixing sleeve is limited in a sliding mode to be provided with a plurality of plunger elements capable of radially displacing along the barrel body, the outer side of the fixing sleeve is sleeved with the transmission sleeve, the spring seat and the compression spring, the inner wall of the transmission sleeve is provided with a guide sliding groove with a conical wall, one end of the transmission sleeve is provided with the spring seat abutting against the end face of the transmission sleeve, the outer end of the spring seat is provided with the compression spring, the outer wall of the transmission sleeve is provided with a movable groove, and one side of the.
Further, the plunger element is provided at its inner end with an inner contact surface for acting on the sleeve and at its outer end with an outer contact surface for cooperation with the conical wall in the guide chute.
Further, the plunger member is of a cylindrical structure or a plate-like structure as a whole.
Furthermore, the other end of the transmission sleeve is provided with a stop block, and when the transmission sleeve abuts against the stop block, the plunger element can completely seal the pipe sleeve under the pushing of the guide sliding groove.
Furthermore, the inner ratchet mechanism I comprises an inner tooth part I positioned on the inner hole wall of the sun gear and an inner pawl I which is rotatably connected to the outer side of the input shaft; the inner ratchet mechanism II comprises an inner tooth part II positioned on the inner hole wall of the pressure plate and an inner pawl II rotatably connected to the outer side of the input shaft.
Furthermore, a limiting groove convenient for the movement of the inner pawl I and the inner pawl II is formed in the outer side of the input shaft.
Further, the thickness of the inner pawl I in the vertical direction is equal to that of the sun gear.
Further, the thickness of the inner pawl II in the vertical direction is equal to that of the pressing plate.
Further, when the input shaft rotates in the positive direction, the sun gear rotates along with the inner ratchet mechanism I, and due to the action of the inner ratchet mechanism II, the pressure plate and the planet carrier where the pressure plate is located cannot directly rotate along with the inner ratchet mechanism I; when the input shaft rotates reversely, the pressure plate and the planet carrier on which the pressure plate is arranged rotate along with the inner ratchet mechanism II, and the sun wheel cannot rotate directly along with the inner ratchet mechanism I.
The invention has the beneficial effects that:
the planetary gear transmission device of the rotary valve has reasonable structural design, and can be effectively combined with the pinch valve on one hand, so that the planetary gear transmission device has the advantages of the pinch valve and can realize on-off regulation and control flow with a certain amplitude; on the other hand, the device can realize quick closing and slow opening and is well suitable for quantitative analysis equipment.
Of course, it is not necessary for any one product that embodies the invention to achieve all of the above advantages simultaneously.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a diagram showing a state of use of the planetary gear transmission of the present invention.
Fig. 2 is a schematic structural view of the planetary gear transmission of the present invention.
FIG. 3 is a schematic view of the inner ratchet mechanism I of the present invention.
FIG. 4 is a schematic structural diagram of an inner ratchet mechanism II according to the present invention.
FIG. 5 is a schematic structural diagram of the rack and pinion gear of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-pinch valve seat, 101-flow channel, 102-fixed sleeve, 103-tube sleeve, 104-plunger element, 105-transmission sleeve, 106-guide sliding groove, 107-spring seat, 108-compression spring, 109-movable groove, 110-spur rack, 2-rotary valve seat, 201-input shaft, 202-handle, 203-sun gear, 204-limit ring, 205-internal ratchet mechanism I, 206-planet gear, 207-internal gear ring, 208-connecting shaft, 209-planet carrier, 210-limit head, 211-pressure plate, 212-fixing piece, 213-internal ratchet mechanism II, 214-output shaft, 215-driving gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The present embodiment is a planetary gear transmission device of a rotary valve, as shown in fig. 1, and includes a pipe clamping valve seat 1 and a rotary valve seat 2, wherein a seat body of the rotary valve seat 2 is fixed to a seat body of the pipe clamping valve seat 1, and a planetary gear transmission assembly is disposed in the seat body of the rotary valve seat 2.
The planetary gear transmission assembly is composed of an input shaft 201, a handle 202, a sun gear 203, a limiting ring 204, an inner ratchet mechanism I205, a planet gear 206, an inner gear ring 207, a connecting shaft 208, a planet carrier 209, a limiting head 210, a pressure plate 211, a fixing piece 212, an inner ratchet mechanism II 213, an output shaft 214 and a driving gear 215, as shown in FIG. 2. The input shaft 201 is located outside the seat body of the rotary valve seat 2, the end part of the input shaft is fixedly provided with a handle 202, the outer side of the shaft body located inside the seat body of the rotary valve seat 2 is fixedly provided with two limiting rings 204, a sun wheel 203 sleeved on the outer side of the input shaft 201 is arranged between the two limiting rings 204, and an inner ratchet mechanism I205 is arranged between the sun wheel 203 and the input shaft 201. A plurality of planet wheels 206 are arranged on the outer side of the sun wheel 203, an inner gear ring 207 meshed with the planet wheels 206 is arranged in the inner cavity of the base body of the rotary valve seat 2, and the planet wheels 206 are connected with a planet carrier 209 positioned in the inner cavity of the base body of the rotary valve seat 2 through a connecting shaft 208. A limiting head 210 is fixed at the inner end of the input shaft 201, the limiting head 210 is limited in the planet carrier 209 through a pressure plate 211 in a rotating mode, the pressure plate 211 is fixed with the planet carrier 209 through a fixing piece 212, and an inner ratchet mechanism II 213 is arranged between the pressure plate 211 and the input shaft 201. An output shaft 214 is fixed to the outer end of the carrier 209 along the axis, and a drive gear 215 as a mechanical drive force is fixed to the end of the output shaft 214 that extends into the pinch valve seat 1.
As shown in fig. 1, a flow passage 101, a fixed sleeve 102, a sleeve 103, a plunger member 104 and a transmission sleeve 105 are provided in a housing of the pinch valve seat 1, the fixed sleeve 102 is provided in the middle of the flow passage 101, and the sleeve 103 defined as a tubular member defining a flow passage for fluid is installed inside the fixed sleeve 102. The middle of the cylinder of the fixed sleeve 102 is limited in sliding by two plunger elements 104 capable of moving along the radial direction thereof, and the outside of the fixed sleeve 102 is sleeved with a transmission sleeve 105, a spring seat 107 and a compression spring 108. The inner wall of the transmission sleeve 105 is provided with a guide chute 106 with a conical wall, one end of the transmission sleeve 105 is provided with a spring seat 107 which is abutted against the end face of the transmission sleeve 105, and the outer end of the spring seat 107 is provided with a compression spring 108. The outer wall of the transmission sleeve 105 is provided with a movable groove 109, the length direction of the movable groove 109 is consistent with the length direction of the flow channel 101, one side of the movable groove 109 is provided with a spur rack 110 meshed with a driving gear 215, and the driving gear 215 and the spur rack 110 form a gear-rack transmission mechanism.
In this embodiment the plunger element 104 is provided with an inner contact surface at its inner end for acting on the sleeve 103 and an outer contact surface at its outer end for cooperating with the conical wall in the guide chute 106. The plunger member 104 is of generally cylindrical or plate-like configuration.
In this embodiment, the other end of the transmission sleeve 105 is provided with a stop block, and when the transmission sleeve 105 abuts against the stop block, the plunger element 104 can completely close the pipe sleeve under the pushing of the guide sliding groove 106.
In this embodiment, the inner ratchet mechanism i 205 includes an inner tooth portion i on the inner hole wall of the sun gear 203 and an inner pawl i rotatably connected to the outer side of the input shaft 201; the inner ratchet mechanism II 213 comprises an inner tooth part II positioned on the inner hole wall of the pressure plate 211 and an inner pawl II which is rotatably connected to the outer side of the input shaft 201. The outer side of the input shaft 201 is provided with a limiting groove which is convenient for the movement of the inner pawl I and the inner pawl II. The thickness of interior pawl I along vertical direction equals the thickness of sun gear, and the thickness of interior pawl II along vertical direction equals the thickness of pressure disk.
When the input shaft 201 rotates in the forward direction, the sun gear 203 rotates along with the inner ratchet mechanism I205, and the pressure plate 211 and the planet carrier 209 on which the pressure plate 211 is arranged cannot directly rotate along with the inner ratchet mechanism II 213; when the input shaft 201 rotates in the reverse direction, the pressure plate 211 and the planet carrier 209 located thereon rotate along with the inner ratchet mechanism II 213, and the sun gear 203 does not directly rotate along with the inner ratchet mechanism I205. The planetary gear transmission device of the rotary valve is reasonable in structural design, and can be effectively combined with a pinch valve on one hand, so that the rotary valve has the advantages of the pinch valve, and meanwhile, on-off regulation and certain-amplitude flow control can be realized; on the other hand, the device can realize quick closing and slow opening and is well suitable for quantitative analysis equipment.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (8)
1. A planetary gear transmission of a rotary valve, characterized in that: the pipe clamping valve seat comprises a pipe clamping valve seat body and a rotary valve seat body, wherein the base body of the rotary valve seat body is fixed with the base body of the pipe clamping valve seat body, a planetary gear transmission assembly is arranged in the base body of the rotary valve seat body and consists of an input shaft, a handle, a sun gear, a limiting ring, an inner ratchet mechanism I, a planet gear, an inner gear ring, a connecting shaft, a planet carrier, a limiting head, a pressure plate, a fixing part, an inner ratchet mechanism II, an output shaft and a driving gear, the input shaft is positioned outside the rotary valve seat body, the end part of the input shaft is fixedly provided with the handle, two limiting rings are fixed on the outer side of a shaft body positioned in the rotary valve seat body, a sun gear sleeved on the outer side of the input shaft is arranged between the two limiting rings, the inner ratchet mechanism I is arranged between the sun gear and the input shaft, a plurality of planet gears, a limiting head is fixed at the inner end of the input shaft, the limiting head is limited in the planet carrier through the rotation of a pressure plate, the pressure plate is fixed with the planet carrier through a fixing piece, an inner ratchet mechanism II is arranged between the pressure plate and the input shaft, an output shaft is fixed at the outer end of the planet carrier along the axis, the output shaft extends into the end part of the pipe clamping valve seat, and a driving gear used as mechanical driving force is fixed at the end part;
the inner ratchet mechanism I comprises an inner tooth part I positioned on the inner hole wall of the sun gear and an inner pawl I rotatably connected to the outer side of the input shaft; the inner ratchet mechanism II comprises an inner tooth part II positioned on the inner hole wall of the pressure plate and an inner pawl II which is rotatably connected to the outer side of the input shaft;
when the input shaft rotates in the forward direction, the sun gear rotates along with the inner ratchet mechanism I, and the pressure plate and the planet carrier where the pressure plate is located cannot directly rotate along with the inner ratchet mechanism II; when the input shaft rotates reversely, the pressure plate and the planet carrier on which the pressure plate is arranged rotate along with the inner ratchet mechanism II, and the sun wheel cannot rotate directly along with the inner ratchet mechanism I.
2. A rotary valve planetary gear transmission as in claim 1, wherein: be equipped with flow channel in the pedestal of double-layered pipe disk seat, fixed sleeve, the pipe box, plunger component and transmission sleeve, flow channel's middle part is equipped with fixed sleeve, fixed sleeve's inboard is installed and is used for fluidic flow channel to prescribe a limit to the pipe box of tubulose part, fixed sleeve's barrel middle part is slided and is restricted to have a plurality of plunger components that can follow its radial displacement, fixed sleeve's outside cover is equipped with transmission sleeve, spring holder and compression spring, the guide chute who takes the toper wall is seted up to transmission sleeve's inner wall, transmission sleeve's one end is equipped with the spring holder that offsets rather than the terminal surface, compression spring is installed to the outer end of spring holder, movable groove has been seted up to transmission sleeve's outer wall, one side.
3. A rotary valve planetary gear transmission as in claim 2, wherein: the plunger element is provided at its inner end with an inner contact surface for acting on the sleeve and at its outer end with an outer contact surface for cooperation with the conical wall in the guide chute.
4. A rotary valve planetary gear transmission as in claim 3, wherein: the plunger member is of a cylindrical or plate-like configuration as a whole.
5. A rotary valve planetary gear transmission as in claim 2, wherein: the other end of the transmission sleeve is provided with a stop block, and when the transmission sleeve is abutted against the stop block, the plunger element can completely seal the pipe sleeve under the pushing of the guide sliding groove.
6. A rotary valve planetary gear transmission as in claim 1, wherein: the outer side of the input shaft is provided with a limiting groove which is convenient for the movement of the inner pawl I and the inner pawl II.
7. A rotary valve planetary gear set as in claim 6, wherein: the thickness of the inner pawl I along the vertical direction is equal to that of the sun gear.
8. A rotary valve planetary gear set as in claim 6, wherein: the thickness of the inner pawl II in the vertical direction is equal to that of the pressure plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911241715.5A CN110886869B (en) | 2019-12-06 | 2019-12-06 | Planetary gear transmission device of rotary valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911241715.5A CN110886869B (en) | 2019-12-06 | 2019-12-06 | Planetary gear transmission device of rotary valve |
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| Publication Number | Publication Date |
|---|---|
| CN110886869A CN110886869A (en) | 2020-03-17 |
| CN110886869B true CN110886869B (en) | 2021-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911241715.5A Active CN110886869B (en) | 2019-12-06 | 2019-12-06 | Planetary gear transmission device of rotary valve |
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| CN (1) | CN110886869B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112761034B (en) * | 2020-12-24 | 2022-08-09 | 成都市新筑路桥机械股份有限公司 | Fluid material pouring trolley |
| CN115183052A (en) * | 2022-06-23 | 2022-10-14 | 大连海事大学 | Flexibly combined and integrated fluid control extrusion type miniature valve and microfluidic chip |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106502A (en) * | 1985-08-27 | 1986-07-02 | 潘业权 | A kind of one way, heavy-duty decelerator with large single tooth |
| CN1202438A (en) * | 1998-06-12 | 1998-12-23 | 贾俊英 | Two-way double speed driver for bicycle |
| CN2418319Y (en) * | 2000-04-17 | 2001-02-07 | 王石柱 | Valve |
| CN101162057A (en) * | 2006-10-13 | 2008-04-16 | 费斯托合资公司 | Pinch valve |
| EP2682652A1 (en) * | 2012-07-03 | 2014-01-08 | FESTO AG & Co. KG | Pinch valve |
| CN108223831A (en) * | 2016-12-21 | 2018-06-29 | 费斯托股份有限两合公司 | Pinch valve |
-
2019
- 2019-12-06 CN CN201911241715.5A patent/CN110886869B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85106502A (en) * | 1985-08-27 | 1986-07-02 | 潘业权 | A kind of one way, heavy-duty decelerator with large single tooth |
| CN1202438A (en) * | 1998-06-12 | 1998-12-23 | 贾俊英 | Two-way double speed driver for bicycle |
| CN2418319Y (en) * | 2000-04-17 | 2001-02-07 | 王石柱 | Valve |
| CN101162057A (en) * | 2006-10-13 | 2008-04-16 | 费斯托合资公司 | Pinch valve |
| EP2682652A1 (en) * | 2012-07-03 | 2014-01-08 | FESTO AG & Co. KG | Pinch valve |
| CN108223831A (en) * | 2016-12-21 | 2018-06-29 | 费斯托股份有限两合公司 | Pinch valve |
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| CN110886869A (en) | 2020-03-17 |
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