CN109357067A - Position limiting structure and pneumatic actuator with the position limiting structure - Google Patents
Position limiting structure and pneumatic actuator with the position limiting structure Download PDFInfo
- Publication number
- CN109357067A CN109357067A CN201811368554.1A CN201811368554A CN109357067A CN 109357067 A CN109357067 A CN 109357067A CN 201811368554 A CN201811368554 A CN 201811368554A CN 109357067 A CN109357067 A CN 109357067A
- Authority
- CN
- China
- Prior art keywords
- friction
- piston
- friction piece
- position limiting
- limiting structure
- 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
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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
-
- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
Abstract
The invention discloses a kind of position limiting structure and when the position limiting structure of the pneumatic actuator with the position limiting structure uses, second friction piece can be installed on to the outer end of operating bar, main frame is accordingly installed in the executing subject or the main body that other relative usage environment are fixed of pneumatic actuator, in operating bar motion process, frictional force between drive module control first friction unit and the second friction piece is small as far as possible (being zero best), active force is not applied as far as possible in operating bar, it avoids influencing operating bar regular event, the second friction piece can be moved with operating bar at this time, after when piston two sides, air pressure balance moves to designated position, frictional force between drive module control first friction unit and the second friction piece is increased rapidly to predetermined value, prevent the second friction piece from opposite first friction unit relative motion, and then the position of piston is locked, disappear In addition to piston moves jitter phenomenon in place in the prior art, the functional reliability of pneumatic actuator can be greatly improved.
Description
Technical field
The present invention relates to control technology field, in particular to a kind of position limiting structure and the pneumatic execution with the position limiting structure
Mechanism.
Background technique
Pneumatic actuator is a kind of device using gas source driving on or off, and opposite movement is answered by spring
Position.The type of pneumatic actuator has: diaphragm type, piston type, fork type and pinion and-rack.
Wherein piston type pneumatic executing agency has the characteristics that stroke is long, using than wide.Pneumatic actuator passes through
Gas source driving piston, which moves left and right, realizes turning on or off for valve.Theoretically, the piston two sides air pressure of pneumatic actuator
After steady, shake will not be generated on piston theory, but it is certain in practical application it is difficult to ensure that.Due to the temperature etc. of piston two sides
Problem, it is likely that cause the change of air pressure, and then piston position is caused to change, generate jitter phenomenon, leverage gas
Move the working performance of the executing agency.
Jitter phenomenon when how to eliminate pistons work is those skilled in that art's technical problem urgently to be resolved always.
Summary of the invention
The present invention provides a kind of position limiting structure, for piston position in locating pneumatic executing agency, including main frame, first
Friction piece and the second friction piece, the first friction unit are fixed on the main frame, along the operating bar of the pneumatic actuator
Direction of action, second friction piece being capable of the relatively described first friction unit reciprocating movements；The position limiting structure further includes driving
Module controls the frictional force size between the first friction unit and second friction piece, by second friction piece with
The locking of both first friction units position or unlock.
Second friction piece in use, the outer end of operating bar, main frame can be installed on by the position limiting structure in the present invention
It is accordingly installed in the executing subject or the main body that other relative usage environment are fixed of pneumatic actuator, such second friction
Body can be with reciprocating motion of the pistons, and first friction unit position is fixed always, immovable.In operating bar motion process, driving
Frictional force between module control first friction unit and the second friction piece is small as far as possible (be zero best), do not apply as far as possible active force in
Operating bar avoids influencing operating bar regular event, and such second friction piece can be moved with operating bar, when the air pressure of piston two sides is flat
After weighing apparatus moves to designated position, the frictional force between drive module control first friction unit and the second friction piece is increased rapidly to pre-
Definite value prevents the second friction piece from opposite first friction unit relative motion, and then the position of piston is locked, and piston will not be due to
Barometric fluctuation caused by two sides gas temperature or other factors and generate mobile phenomenon, it is mobile to eliminate piston in the prior art
Jitter phenomenon in place can greatly improve the functional reliability of starting executing agency.
Optionally, the drive module is electromagnetic module, and the electromagnetic module is set to the center of second friction piece,
When the electromagnetic module is powered, the electromagnetic module volume expands outward and then squeezes described second under the action of electromagnetic force
Friction piece compresses the first friction unit, and second friction piece is locked by frictional force position between the two；When the electromagnetism
Module power off when, the electromagnetic module volume in a state of nature, second friction piece separated with the first friction unit or
Sliding friction.
Optionally, the drive module is Pneumatic assembly, and the Pneumatic assembly includes control valve, cylinder barrel and is set to described
The inner cavity of cylinder is divided into first annular seal space room and the second sealed chamber, the work by the piston inside cylinder barrel, the piston
Plug is connected with piston rod, and second friction piece is set to the outer end that the piston rod is located at outside the cylinder barrel, when described
When control valve is in the first working condition, external air source enter the first annular seal space room to push the piston to be displaced outwardly,
Final second friction piece compresses the first friction unit, when the control valve is in the second working condition, the piston
Original state is returned back to, second friction piece is separated with the first friction unit or sliding friction.
Optionally, the control valve is the solenoid valve of binary channel comprising first, second mouthful, third mouth and spool,
The first, described second mouthful be connected to respectively with gas source, exhaust pipe, the third mouth is connected to the first annular seal space room,
When in first working condition, the spool is in first position, and the third mouth is connected to the first, and with institute
State second mouthful of disconnection；When being in second working condition, third mouth is connected to second mouthful, and is disconnected with the first.
Optionally, the Pneumatic assembly further includes spring, and when the piston moves out, the piston compresses the bullet
Spring, after the gas source and first annular seal space room disconnection, under the restoring force effect of the spring, the piston is returned back to
Original state.
Optionally, cylinder barrel arrangement is there are two the piston being oppositely arranged, and the outer end of two pistons is mounted on the
Two friction pieces, and a control valve controls the working condition of two pistons simultaneously.
Optionally, there are two the side wall being oppositely arranged, the inner surface of two side walls is respectively provided with the main frame tool
State first friction unit, second friction piece between two side walls, the two sidewalls of second friction piece can respectively with
The two sides accordingly first friction unit CONTACT WITH FRICTION locking.
It optionally, further include mobile bar, one end extends to outside the main frame to connect the pneumatic actuator
Operating bar, second friction piece and drive module are installed on the other end of the mobile bar.
It optionally, further include position sensor, for detecting the displacement signal of second friction piece, peripheral control unit root
The position of second friction piece is judged according to sensor displacement signal detected, and then judges the pneumatic actuator
State.
Optionally, the main frame has two sidewalls, and the inner surface of two side walls is provided with the first friction unit,
Between two side walls, two sidewalls can connect second friction piece in the first friction unit friction corresponding to two sides respectively
Touching locking, the analog module are set to the bottom wall.
In addition, the present invention also provides a kind of pneumatic actuator, including executing subject, it further include described in any of the above-described
Position limiting structure.
Optionally, the second friction piece of the position limiting structure and the drive module are directly mounted at the executing subject
The outer end of operating bar.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of a kind of position limiting structure of the present invention and operating bar assembling；
Fig. 2 is enlarged diagram at A in Fig. 1；
Fig. 3 is another view of Fig. 1；
Fig. 4 is a kind of structural schematic diagram of control valve of the present invention.
Wherein, in Fig. 1 to Fig. 4:
Main frame 1, first friction unit 2, the second friction piece 3, cylinder barrel 41, piston 42, piston rod 43, spring 44, induction mould
Block 5, contact jaw 6；
Control valve 7, first 7a, second mouthful of 7b, third mouth 7c, spool 71；
Operating bar 20.
Specific embodiment
It is with reference to the accompanying drawing and specific real in order to make those skilled in the art more fully understand technical solution of the present invention
Applying example, the present invention is described in further detail.
Referring to FIG. 1, Fig. 1 is the structural schematic diagram of a kind of position limiting structure of the present invention and operating bar assembling；Fig. 2 is A in Fig. 1
Locate enlarged diagram；Fig. 3 is another view of Fig. 1.
Pneumatic actuator includes executing subject, and executing subject is internally provided with fluid channel and piston, on fluid channel
It is provided with valve, gas source drives reciprocating motion of the pistons in first position and the second position, when piston is located at first position, executes
The valve of body interior is opened, and when piston is located at the second position, the valve inside executing subject is closed, to meet pneumatic execute
The work requirements of system where mechanism.Wherein for the specific structure of the fluid channel inside pneumatic actuator please refers to existing
There is technology, does not repeat them here herein.
Piston inside pneumatic actuator is connected with operating bar 20, and the part of operating bar 20 is located at the interior of executing subject
Portion, the end of operating bar 20 are located at the outside of executing subject, and operating bar 20 can be with reciprocating motion of the pistons.
The present invention provides a kind of position limiting structures, for the position of piston in locating pneumatic executing agency, the position limiting structure
Including main frame 1, first friction unit 2 and the second friction piece 3.Wherein first friction unit 2 is fixed on main frame 1, and the two can lead to
It crosses bonding or the modes such as tensioning or rivet clasp is fixed.
Along 20 direction of action of operating bar of pneumatic actuator, the second friction piece 3 can back and forth be moved with respect to first friction unit 2
It is dynamic.20 direction of action of operating bar of so-called pneumatic actuator refers to, when starting executing agency's work, the movement of operating bar 20
Direction.As shown in fig. 1, about 20 telescopic moving of operating bar.
Position limiting structure in the present invention further includes drive module, and drive module can control first friction unit 2 and second and rub
Both second friction piece 3 and first friction unit 2 position are locked or are unlocked by the frictional force size between rub body 3.
That is, the frictional force size between first friction unit 2 and the second friction piece 3 can be adjusted by drive module
Section, when the two frictional force increases to predetermined value, the opposite first friction unit 2 of the second friction piece 3 cannot continue to slide, i.e., first rubs
Rub body 2 and the second friction piece 3 are fixed relative position under the action of frictional force, when between first friction unit 2 and the second friction piece 3
Frictional force be less than predetermined value (situation for being zero including the two separation frictional force), the second friction piece 3 opposite first can rub
Body 2 slides.
Second friction piece 3 in use, the outer end of operating bar 20, main frame can be installed on by the position limiting structure in the present invention
Frame 1 is accordingly installed in the executing subject or the main body that other relative usage environment are fixed of pneumatic actuator, and such second
Friction piece 3 can be with reciprocating motion of the pistons, and 2 position of first friction unit is fixed always, immovable.Operating bar motion process
In, the frictional force between drive module control first friction unit 2 and the second friction piece 3 is small as far as possible (being zero best), does not apply as far as possible
Add active force in operating bar 20, avoiding, which influences operating bar 20, is operating normally, and such second friction piece 3 can be transported with operating bar 20
It is dynamic, after when piston two sides, air pressure balance moves to designated position, drive module control first friction unit 2 and the second friction piece 3 it
Between frictional force increase rapidly to predetermined value, prevent the second friction piece 3 from opposite 2 relative motion of first friction unit, and then piston
Position it is locked, piston will not the barometric fluctuation as caused by two sides gas temperature or other factors and generate mobile existing
As eliminating the mobile jitter phenomenon in place of piston in the prior art, the functional reliability of starting executing agency can be greatly improved.
Realize that the structure type of the drive module of change in friction force between first friction unit 2 and the second friction piece 3 can have
It is a variety of, describe two kinds of specific embodiments in detail herein.
In the first specific embodiment, drive module can be electromagnetic module, and electromagnetic module can be set in second
The center of friction piece 3, when electromagnetic module is powered, under the action of electromagnetism produced by electromagnetic module, electromagnetic module volume is outside
Expansion, and then squeeze the second friction piece 3 and compress first friction unit 2, that is to say, that between the second friction piece 3 and first friction unit 2
Contact force become larger, the second friction piece 3 passes through frictional force position between the two and locks.
When electromagnetic module power-off, electromagnetic force disappears, electromagnetic module volume in a state of nature, first friction unit 2 and the
The separation of two friction pieces 3 or sliding friction, such second friction piece 3 can be moved with operating bar 20.
Change the contact force between first friction unit 2 and the second friction piece 3 by electromagnetic module, and then increases between the two
Frictional force, the embodiment structure is simple, easy to implement.
It is please a kind of structural schematic diagram of control valve 7 of the present invention in conjunction with Fig. 4, Fig. 4.
In another embodiment specific implementation mode, drive module can be Pneumatic assembly, and Pneumatic assembly includes control valve 7, cylinder
41 inner cavity of cylinder barrel is divided into first annular seal space room and the second sealing by cylinder 41 and the piston 42 being set to inside cylinder barrel 41, piston 42
Chamber, piston 42 are connected with piston rod 43, and the second friction piece 3 is set to the outer end that piston rod 43 is located at outside cylinder barrel 41, when
When control valve 7 is in the first working condition, external air source enters first annular seal space room to push piston to be displaced outwardly, and final second
Friction piece 3 compresses first friction unit 2, and when control valve 7 is in the second working condition, piston returns back to original state, and second rubs
Rub body 3 is separated with first friction unit 2 or sliding friction.
Further, Pneumatic assembly further includes spring 44, and when piston moves out, piston compressed spring 44 works as gas source
After disconnecting with first annular seal space room, under the restoring force effect of spring 44, piston returns back to original state.
It is to be appreciated that piston moves out the end movement for being directed to cylinder barrel 41.
This is conducive to piston returning quickly, the second friction piece 3 and 2 quick separating of first friction unit, improves the sensitive of mechanism
Property.
In the various embodiments described above, for the arrangement of cylinder barrel 41 there are two the piston 42 being oppositely arranged, the outer end of two-piston bar 43 is equal
Second friction piece 3 is installed, and a control valve 7 controls the working condition of two-piston 42 simultaneously.
Certainly, Pneumatic assembly may be that gas rises component, and the gas component that rises by control valve 7 is connected to or disconnects external air source,
When control valve 7 is in the first working condition, gas rises, and the expansion of component ventilation volume in turn rub by the second friction piece 3 of extruding compression first
Rub body 2, when control valve 7 is in the second working condition, rise component and gas source of gas disconnects volume and restores reset condition, the second friction
Body 3 is separated with first friction unit 2 or sliding friction.
The gas component that rises can be air bag.The specific structure of control valve 7 without limitation, as long as can be realized above-mentioned function i.e.
It can.In addition, the gas of Pneumatic assembly can derive from the gas source of pneumatic actuator.
It is the feelings for increase first friction unit 2 and the second friction piece 3 contact force increasing friction force between the two above
For condition, it is, of course, also possible to realize by increasing the contact area between first friction unit 2 and the second friction piece 3 and increase the two
The effect of frictional force, specific embodiment is herein without being discussed in detail.
In a specific embodiment, the control valve 7 in Pneumatic assembly can be the solenoid valve of binary channel comprising the
A bite 7a, second mouthful of 7b, third mouth 7c and spool 71, first 7a, second mouthful of 7b are connected to gas source, exhaust pipe respectively, the
Three mouthfuls of 7c are connected to first annular seal space room, and when being in the first working condition, spool 71 is in first position, third mouth 7c and first
7a connection, and disconnected with second mouthful of 7b；When being in the second working condition, third mouth 7c is connected to second mouthful of 7b, and with first
Mouth 7a is disconnected.
Control valve 7 in the embodiment is relatively simple for structure, and volume can be small as far as possible, can be directly mounted at and execute master
On the outer wall of body.
Main frame 1 in the various embodiments described above can be to realize the first friction by diversified forms, the main function of main frame 1
The installation of the components such as body 2, and be coupled with external structure.In a kind of specific embodiment, main frame 1 can be with
There are two the side wall being oppositely arranged, the inner surfaces of two sidewalls to be provided with first friction unit 2 for tool, and the second friction piece 3 is located at two sides
Between wall, the two sidewalls of the second friction piece 3 can 2 CONTACT WITH FRICTION of first friction unit locking corresponding to two sides respectively.
That is, when carrying out position locking, the first friction corresponding to two sides simultaneously of the two sidewalls of the second friction piece 3
The contact of body 2 or contact area increase, and increase frictional force between the second friction piece 3 and the second friction piece 3, and then make the second friction
The locking of 3 position of body.
One the second friction piece 3 can be contacted with the first friction unit 2 of two sides simultaneously, be conducive to reduce the second friction in this way
The unilateral contact surface area of body 3, makes the compact-sized of position limiting structure.
As described above, the second friction piece 3 and drive module can be directly mounted at outside the operating bar 20 of pneumatic actuator
Intermediate member can also be specially arranged in end, and the second friction piece 3 and drive module are first installed on intermediate member, intermediate member
Operating bar 20 is reconnected, is conducive to position limiting structure in this way and is independently arranged.
For example, position-limit mechanism may include mobile bar, the one end of mobile bar is extended to and is pneumatically held outside main frame 1 with connection
The operating bar 20 of row mechanism, the second friction piece 3 and drive module are installed on the other end of mobile bar.
When pneumatic actuator works, it will appear malfunction or error, inevitably in order to accurately understand pneumatic actuator
Working performance, the present invention also carried out following setting.
In the respective embodiments described above, position limiting structure can also include position sensor, for detecting the position of the second friction piece 3
Shifting signal, peripheral control unit can judge the position of the second friction piece 3 according to position sensor displacement signal detected, in turn
Judge the state of pneumatic actuator.Position sensor may include induction module 5 and contact jaw 6, and contact jaw 6 is with the second friction
Body 3 moves, and induction module 5 is fixed on main frame 1.
In this way, peripheral control unit can may determine that the position of piston, outside control according to the detection signal of position sensor
Piston position information of the device processed by comparing the testing result and the feedback of pneumatic actuator itself at this time of position sensor, judgement
Whether pneumatic actuator work at this time is reliable, i.e., position sensor has auxiliary examination effect, improves pneumatic actuator
Operating accuracy.
Design method provided by the present invention is in addition to that can prevent from shaking, reduce the shakiness after pneumatic mechanism enters stable state
Other than qualitative, another is advantageous in that the design will not influence the sensitivity of system, because of the binary channel electromagnetism that this wink is dynamic
Valve moment after closing an access opens another access, changes position by then passing through air pressure, does not need time limit setting, and
And the time of lag can just guarantee that piston settles out, the value for carrying out secondary sensing comparison position so also more may be used
It leans on.
The logic of this feedback position is also to improve system accuracy from another point of view, because of the meeting after differing larger twice
The air flue for reopening normal work, the characteristics of due to control valve 7, position-limit mechanism can be broken instantaneously, and carry out another position
Adjusting, and current judgment value can in advance for PID adjust etc. regulating measures information is provided, it is ensured that the accuracy adjusted again.
Even if also still can guarantee accuracy not in the case where inside has aging conditions not have on-call maintenance in this way reduces.
The shift position that control strategy can first pass through piston in advance in peripheral control unit carries out reasonable set, unjust herein
Body control strategy is issued, understanding and implementation of the those skilled in that art to above-described embodiment are had no effect on.
On the basis of the above embodiments, main frame 1 can be as above arranged, i.e., main frame 1 has two sidewalls, two sides
The inner surface of wall is provided with first friction unit 2, the second friction piece 3 between two sidewalls, two sidewalls can respectively with two sides
Corresponding 2 CONTACT WITH FRICTION of first friction unit locking.
Main frame 1 can also include the bottom wall being connected between the long side of two sidewalls, and the induction module of position sensor can
To be installed on bottom wall, contact jaw 6 can be ball, can move synchronously with operating bar 20, and ball connects with the sliding of induction module 5
Touching.
Pneumatic actuator has any of the above-described position limiting structure, therefore also with the above-mentioned technical effect of position limiting structure.
The pneumatic actuator to a kind of position limiting structure provided by the present invention and with the position limiting structure carries out above
It is discussed in detail.Used herein a specific example illustrates the principle and implementation of the invention, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention.It should be pointed out that for the common skill of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for art personnel, these change
It is also fallen within the protection scope of the claims of the present invention into modification.
Claims (12)
1. a kind of position limiting structure, for piston position in locating pneumatic executing agency, which is characterized in that including main frame (1), the
One friction piece (2) and the second friction piece (3), the first friction unit (2) are fixed on the main frame (1), pneumatically hold along described
Operating bar (20) direction of action of row mechanism, second friction piece (3) being capable of the back and forth shiftings of the relatively described first friction unit (2)
It is dynamic；The position limiting structure further includes drive module, is controlled between the first friction unit (2) and second friction piece (3)
Both second friction piece (3) and the first friction unit (2) position is locked or is unlocked by frictional force size.
2. position limiting structure as described in claim 1, which is characterized in that the drive module be Pneumatic assembly, described pneumatic group
Part includes control valve (7), cylinder barrel (41) and is set to the internal piston of the cylinder barrel (41), and the piston is by the cylinder barrel (41)
Inner cavity is divided into first annular seal space room and the second sealed chamber, and the piston is connected with piston rod (43), second friction piece
(3) piston rod (43) are set to and are located at the external outer end of the cylinder barrel (41), when the control valve (7) are in the first work
When making state, external air source enters the first annular seal space room to push the piston to be displaced outwardly, and final described second rubs
Body (3) compresses the first friction unit (2), and when the control valve (7) is in the second working condition, the piston is returned back to just
Beginning state, second friction piece (3) separates with the first friction unit (2) or sliding friction.
3. position limiting structure as claimed in claim 2, which is characterized in that the control valve is the solenoid valve of binary channel, (7) packet
Include first, second mouthful, third mouth and spool, the first, described second mouthful be connected to respectively with gas source, exhaust pipe,
The third mouth is connected to the first annular seal space room, and when being in first working condition, the spool is in first position, institute
It states third mouth to be connected to the first, and is disconnected with described second mouthful；When be in second working condition when, third mouth with
Second mouthful of connection, and disconnected with the first.
4. position limiting structure as claimed in claim 2, which is characterized in that the Pneumatic assembly further includes spring (44), when described
When piston moves out, the piston compresses the spring (44), after the gas source and first annular seal space room disconnection,
Under the restoring force effect of the spring (44), the piston returns back to original state.
5. position limiting structure as claimed in claim 2, which is characterized in that there are two the work being oppositely arranged for cylinder barrel (41) arrangement
Plug, the outer end of two piston rods (43) is mounted on the second friction piece (3), and a same time control of the control valve (7)
Make the working condition of two pistons.
6. position limiting structure as described in claim 1, which is characterized in that the drive module is electromagnetic module, the electromagnet mode
Block is set to the center of second friction piece (3), and the second friction piece (3) compresses the first friction unit (2), and described second rubs
Rub body (3) is locked by frictional force position between the two；When electromagnetic module power-off, the electromagnetic module volume is in original
Beginning state, second friction piece (3) separates with the first friction unit (2) or sliding friction.
7. such as the described in any item position limiting structures of claim 2 to 6, which is characterized in that there are two opposite for main frame (1) tool
The side wall of setting, the inner surface of two side walls are provided with the first friction unit (2), and second friction piece (3) is located at
Between two side walls, the two sidewalls of second friction piece (3) can first friction unit (2) friction corresponding to two sides respectively
Contact locking.
8. position limiting structure as claimed in claim 7, which is characterized in that further include mobile bar, one end extends to the main frame
(1) the external operating bar (20) to connect the pneumatic actuator, second friction piece (3) and drive module are installed on institute
State the other end of mobile bar.
9. such as the described in any item position limiting structures of claim 2 to 6, which is characterized in that further include position sensor (6) for examining
The displacement signal of second friction piece (3) is surveyed, peripheral control unit judges second friction according to displacement signal detected
The position of body (3), and then judge the state of the pneumatic actuator.
10. position limiting structure as claimed in claim 9, which is characterized in that the main frame (1) has two sidewalls, two sides
The inner surface of wall is provided with the first friction unit (2), and second friction piece (3) is between two side walls, and two
Side wall can first friction unit (2) the CONTACT WITH FRICTION locking corresponding to two sides respectively.
11. a kind of pneumatic actuator, including executing subject, which is characterized in that further include described in any one of claims 1 to 10
Position limiting structure.
12. pneumatic actuator as claimed in claim 11, which is characterized in that the second friction piece (3) of the position limiting structure
The outer end of the operating bar (20) of the executing subject is directly mounted at the drive module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368554.1A CN109357067A (en) | 2018-11-16 | 2018-11-16 | Position limiting structure and pneumatic actuator with the position limiting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811368554.1A CN109357067A (en) | 2018-11-16 | 2018-11-16 | Position limiting structure and pneumatic actuator with the position limiting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109357067A true CN109357067A (en) | 2019-02-19 |
Family
ID=65345561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811368554.1A Pending CN109357067A (en) | 2018-11-16 | 2018-11-16 | Position limiting structure and pneumatic actuator with the position limiting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109357067A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU512312A1 (en) * | 1974-02-18 | 1976-04-30 | Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения | Pneumatic cylinder |
| SU928100A1 (en) * | 1978-10-19 | 1982-05-15 | Специализированное Конструкторско-Технологическое Бюро По Автоматизации Технологических Процессов И Промышленному Роботостроению | Pneumatic cylinder |
| CN103032410A (en) * | 2012-12-26 | 2013-04-10 | 清华大学 | Electromagnetic self-locking air cylinder |
-
2018
- 2018-11-16 CN CN201811368554.1A patent/CN109357067A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU512312A1 (en) * | 1974-02-18 | 1976-04-30 | Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения | Pneumatic cylinder |
| SU928100A1 (en) * | 1978-10-19 | 1982-05-15 | Специализированное Конструкторско-Технологическое Бюро По Автоматизации Технологических Процессов И Промышленному Роботостроению | Pneumatic cylinder |
| CN103032410A (en) * | 2012-12-26 | 2013-04-10 | 清华大学 | Electromagnetic self-locking air cylinder |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10221957B2 (en) | Solenoid valve | |
| KR101723128B1 (en) | Pressure balanced valve with diaphragm for sealing valve member end | |
| CN109790859B (en) | Fluid pressure cylinder | |
| JP2017122454A (en) | Apparatus using electronically controlled valves | |
| JP2001027359A (en) | Selector valve with position detecting function | |
| SE0400394L (en) | Coupling device | |
| CN101524962B (en) | Clutch operating system | |
| JPS6375601U (en) | ||
| CN109357067A (en) | Position limiting structure and pneumatic actuator with the position limiting structure | |
| KR20120009398A (en) | Control valve for variable capacity compressor | |
| US11530760B2 (en) | Hydraulic cartridge valve with activation sensor | |
| CN110579349A (en) | device and method for detecting hysteresis characteristic of air pressure proportional relay valve | |
| US10007278B2 (en) | Pneumatic valve and use thereof for a connected consumer | |
| WO2018056037A1 (en) | Fluid pressure cylinder | |
| CN211648641U (en) | Oil cylinder device with air detection type position signal feedback structure | |
| CN211778298U (en) | Pilot-operated open-loop control proportional flow valve | |
| CN212028722U (en) | Pilot-operated proportional flow valve with flow feedback function | |
| CN111868406B (en) | Clutch control device | |
| KR101402011B1 (en) | A pneumatic pilot valve | |
| JPS5922378Y2 (en) | Double valve failure detection device | |
| JPH0626721Y2 (en) | accumulator | |
| CN117852163A (en) | Method and system for constructing train air brake system simulation model | |
| JPH0828510A (en) | Lock mechanism | |
| JP2000161311A (en) | Cylinder with sensor | |
| JPH0440052Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190219 |