CN110220033A - The rack-and-pinion pneumatic actuator of ultralong-stroke - Google Patents
The rack-and-pinion pneumatic actuator of ultralong-stroke Download PDFInfo
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- CN110220033A CN110220033A CN201910627905.4A CN201910627905A CN110220033A CN 110220033 A CN110220033 A CN 110220033A CN 201910627905 A CN201910627905 A CN 201910627905A CN 110220033 A CN110220033 A CN 110220033A
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- cylinder body
- hole
- central housing
- rack
- side cylinder
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- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
- F15B2215/305—Constructional details thereof characterised by the use of special materials
Abstract
The present invention relates to a kind of rack-and-pinion pneumatic actuators of ultralong-stroke, belong to actuation technologies field.It includes cylinder body, drive shaft and rack piston；The cylinder body and drive shaft are cooperatively connected, and drive shaft is engaged with rack piston；It is characterized in that: the cylinder body includes left side cylinder body, central housing and right side cylinder body；The left side cylinder body, central housing and right side cylinder body interconnect, and are combined into cylinder body；The drive shaft and rack piston are respectively positioned in central housing.The rack-and-pinion pneumatic actuator of ultralong-stroke provided by the invention avoids the single too long predicament of cylinder body length while guaranteeing rack piston movement travel；Meanwhile the design of central housing avoids rack piston guide collar and sealing ring and moves back and forth the loss to fixture rack piston guide collar and sealing ring in seam crossing.
Description
Technical field
The present invention relates to a kind of rack-and-pinion pneumatic actuators of ultralong-stroke, belong to actuation technologies field.
Background technique
Pneumatic actuator is the executive device with the opening and closing of air pressure power drive or control valve, but by title pneumatic actuator or
Pneumatic device, but general popular referred to as pneumatic head.Pneumatic actuator is also equipped with certain auxiliary device sometimes.Commonly
There are valve positioner and handwheel.The effect of valve positioner is to improve the performance of actuator using feedback principle, makes to hold
Row device can realize accurately positioning by the control signal of controller.The effect of handwheel is when control system is because having a power failure, stopping
Gas, controller without output or when executing agency's failure, using it can direct manipulation and control valve, with maintain production it is normal into
Row.
Pneumatic actuator pushes piston to two end motion of cylinder body, the rack gear of piston and driving by the indoor bleed pressure of gas
Under engagement, drive shaft starts turning the gear of axis；If desired drive shaft opposite direction rotates, then indoor by another gas
Bleed pressure pushes piston to cylinder body intermediary movements, and under engagement, drive shaft is opened for the rack gear of piston and the gear of drive shaft
Begin to rotate.
Rack-and-pinion pneumatic actuator is during practice, in addition to there is the standard of 90 degree of drive shaft rotating distance angle
Usage, also as the diversity of matched valve, required rack-and-pinion pneumatic actuator drive shaft needs bigger rotating distance
Angle, such as 120 degree, 135 degree, 180 degree, 270 degree, 360 degree of unconventional angles.The working principle of rack-and-pinion pneumatic actuator
For the rack gear engagement of the wheel and rack piston of drive shaft, rack piston is moved in a straight line in cylinder inner bore, is engaged with rack
Gear drive shaft make rotating motion along cylinder body central axis direction.
The rack-and-pinion pneumatic actuator of more high rotation angle degree, either the rack gear length or tooth of rack piston itself
The linear motion stroke of piston, the rack-and-pinion pneumatic actuator that angles are rotated compared to 90 degree all can be longer, therefore conduct
The carrier of rack piston movement, cylinder body also require the linear motion stroke that enough length guarantees rack piston.It is longer
Cylinder body length, for the cylinder body that inner hole needs to finish, it is meant that difficulty of processing is bigger.When processing cylinder inner bore, more
Long cylinder body length causes inner hole boring tool to need longer processing stroke, can only increase the shank length of boring cutter accordingly, longer
Handle it is long also mean that as the stroke of bore hole is continuously increased, on boring cutter head because of the influence of the long arm of force, boring cutter circumference side
To bounce continue to increase, that is, " knife is got rid of " that those skilled in the art are commonly called as, so not can guarantee more good cylinder
Internal hole circularity and cylindricity.This two geometric tolerances it is out of control, it is meant that rack piston does straight line fortune in cylinder inner bore
Bigger loss is had when dynamic, results in the ride comfort of rack piston movement, further causes the torque drop of drive shaft output
It is low.
Summary of the invention
The purpose of the present invention is overcoming above-mentioned shortcoming, a kind of rack-and-pinion pneumatic actuator of ultralong-stroke is provided,
It can provide the housing structure of ultralong-stroke, while guaranteeing rack piston movement travel, avoid single cylinder body length
Too long predicament.
Technical solution of the present invention, the rack-and-pinion pneumatic actuator of ultralong-stroke, including cylinder body, drive shaft and rack gear are living
Plug；The cylinder body and drive shaft are cooperatively connected, and drive shaft is engaged with rack piston；It is characterized in that: the cylinder body includes left side cylinder
Body, central housing and right side cylinder body；The left side cylinder body, central housing and right side cylinder body interconnect, and are combined into cylinder body；It is described
Drive shaft and rack piston are respectively positioned in central housing.
Further, a cylinder inner bore is equipped on the left side cylinder body, central housing and right side cylinder body；Cylinder inner bore
Penetrate through entire cylinder body；Cylinder inner bore on three assembly cylinder-bodies is in the same size, and position is identical.
Further, the left side cylinder body is equipped with the first positioning counterbore, the first connection through-hole and the first dowel hole；Institute
Rheme is equipped with the first positioning counterbore in one end margin of cylinder inner bore on the cylinder body of left side；The left side cylinder body is connect with central housing
A side end face be equipped with several the first connection through-holes and the first dowel hole.
Further, the central housing be equipped with positioning step, venthole, connection seal groove, connection screw thread hole and
Detent fit hole；The cylinder inner bore edges at two ends on central housing is equipped with positioning step；The positioning step
On be additionally provided on connection seal groove and the central housing both sides of the face and be equipped with venthole, connection screw thread hole and positioning pin
Matching hole.
Further, the right side cylinder body is equipped with the second positioning counterbore, the second connection through-hole and the second dowel hole；Institute
Rheme is equipped with the second positioning counterbore in one end margin of cylinder inner bore on the cylinder body of right side；The right side cylinder body is connect with central housing
A side end face be equipped with several the second connection through-holes and the second dowel hole.
Further, the left side cylinder body is equipped with the first positioning counterbore, and central housing is equipped with positioning step, right side cylinder
Body is equipped with the second positioning counterbore；The left side cylinder body and central housing are connected by the first positioning counterbore and positioning step cooperation
It connects；The right side cylinder body and central housing are cooperatively connected by the second positioning counterbore and positioning step.
Further, the left side cylinder body is equipped with the first connection through-hole and the first dowel hole；Central housing is equipped with
Connection screw thread hole and detent fit hole；Right side cylinder body is equipped with the second connection through-hole and the second dowel hole；
The left side cylinder body and central housing pass through the first connection through-hole and connection screw thread hole, the first dowel hole and positioning
Pin matching hole is fixed；The central housing and right side cylinder body pass through connection screw thread hole and the second connection through-hole, detent fit hole
It is fixed with the second dowel hole.
It further, further include connection sealing ring；The connection sealing ring is set in connection seal groove；The ventilation
Bore edges are again provided with vent seal ring recess, are equipped with corresponding sealing ring in slot.
Beneficial effects of the present invention: the rack-and-pinion pneumatic actuator of ultralong-stroke provided by the invention is guaranteeing that rack gear is living
While filling in movement travel, the single too long predicament of cylinder body length is avoided；Meanwhile the design of central housing avoids rack gear and lives
It fills in guide collar and sealing ring and moves back and forth the loss to fixture rack piston guide collar and sealing ring in seam crossing.
Detailed description of the invention
Fig. 1 is stereochemical structure cross-sectional view of the present invention.
Fig. 2 is left side housing structure schematic diagram.
Fig. 3 is left side cylinder body right view.
Fig. 4 is central housing structural front view.
Fig. 5 is central housing structural side view.
Fig. 6 is right side housing structure schematic diagram.
Fig. 7 is right side housing structure left view.
Description of symbols: 1, cylinder body；11, left side cylinder body；111, the first positioning counterbore；112, the first connection through-hole；
113, the first dowel hole；12, central housing；121, positioning step；122, venthole；123, seal groove is connected；124, even
Connect threaded hole；125, detent fit hole；13, right side cylinder body；131, the second positioning counterbore；132, the second connection through-hole；133,
Second dowel hole；14, cylinder inner bore；2, drive shaft；3, rack piston.
Specific embodiment
Rack-and-pinion pneumatic actuator is during practice, in addition to there is the standard of 90 degree of drive shaft rotating distance angle
Usage, also as the diversity of matched valve, required rack-and-pinion pneumatic actuator drive shaft needs bigger rotating distance
Angle, such as 120 degree, 135 degree, 180 degree, 270 degree, 360 degree of unconventional angles.Because the gear of drive shaft and rack piston
The meshing characteristic of rack gear, gear and rack gear use identical tooth module, have a letter to answer at this and calculate rack piston linear motion
The formula of distance: θ/360 L=π * m*Z*.Wherein L represents the linear distance that rack piston needs movement travel, and π is pi, m
For the tooth module of axle shaft gear, Z is the number of gear teeth of drive shaft, and θ is the angle that drive shaft needs to rotate.The rotation of drive shaft
Angle, θ is bigger, and the linear motion stroke L of corresponding rack piston is also bigger, it is corresponding required on rack gear with drive shaft
The number of teeth of gear engagement is more, that is, the tooth plate of rack piston just needs more to grow.
The rack-and-pinion pneumatic actuator of more high rotation angle degree, either the rack gear length or tooth of rack piston itself
The linear motion stroke of piston, the rack-and-pinion pneumatic actuator that angles are rotated compared to 90 degree all can be longer, therefore conduct
The carrier of rack piston movement, cylinder body also require the linear motion stroke that enough length guarantees rack piston.It is longer
Cylinder body length, for the cylinder body that inner hole needs to finish, it is meant that difficulty of processing is bigger.
From the point of view of processing technology angle, the control of two geometric tolerances is needed to guarantee that rack piston exists as cylinder inner bore
Low-loss and ride comfort in motion process.One be cylinder inner bore circularity, one be cylinder inner bore cylindricity.
By taking the cylinder body of a cylinder inner bore diameter 210mm as an example, the cylinder body length of 90 degree of drive shaft rotating distance angle is
361mm, under existing fabrication process condition, it is ensured that the geometric tolerance of cylinder inner bore circularity 0.05mm, cylinder inner bore cylinder
Spend the geometric tolerance of 0.05mm；But the cylinder body length of drive shaft rotating distance angle 180 degree is 614mm, is that original cylinder body is long
About 1.7 times of degree can only guarantee the geometric tolerance of cylinder inner bore circularity 0.15mm under existing fabrication process condition, in cylinder body
The geometric tolerance of hole cylindricity 0.20mm, this is because when processing cylinder inner bore, longer cylinder body length leads to inner hole boring tool
Longer processing stroke is needed, the shank length of boring cutter can only be increased accordingly, longer handle length is also meaned that with bore hole
Stroke be continuously increased, on boring cutter head because the influence of the long arm of force, the bounce of boring cutter circumferencial direction continues to increase, that is, I
" knife is got rid of " that is commonly called as, so not can guarantee more good cylinder inner bore circularity and cylindricity.This two geometric tolerances
It is out of control, it is meant that bigger loss is had when rack piston moves in a straight line in cylinder inner bore, result in rack piston fortune
Dynamic ride comfort, the torque for further causing drive shaft output reduce.
In view of the above-mentioned problems, the rack-and-pinion of ultralong-stroke is pneumatically held the present invention provides solution as shown in figs. 1-7
Row device, including cylinder body 1, drive shaft 2 and rack piston 3；The cylinder body 1 is cooperatively connected with drive shaft 2, and drive shaft 2 and rack gear are living
3 engagement of plug；It is characterized in that: the cylinder body 1 includes left side cylinder body 11, central housing 12 and right side cylinder body 13；The left side cylinder body
11, central housing 12 and right side cylinder body 13 interconnect, and are combined into cylinder body 1；During the drive shaft 2 and rack piston 3 are respectively positioned on
Between in cylinder body 12.
A cylinder inner bore 14 is equipped on the left side cylinder body 11, central housing 12 and right side cylinder body 13；Cylinder inner bore
The 14 entire cylinder bodies 1 of perforation；Cylinder inner bore 14 on three assembly cylinder-bodies is in the same size, and position is identical.
The left side cylinder body 11 is equipped with the first positioning counterbore 111, first connection through-hole 112 and the first dowel hole 113；
14 1 end margin of cylinder inner bore on left side cylinder body 11 is equipped with the first positioning counterbore 111；The left side cylinder body 11 with
The side end face that central housing 12 connects is equipped with several first connection through-holes 112 and the first dowel hole 113.
The central housing 12 is equipped with positioning step 121, venthole 122, connection seal groove 123, connection screw thread hole
124 and detent fit hole 125；14 edges at two ends of cylinder inner bore on central housing 12 is equipped with positioning step
121；Be additionally provided on the positioning step 121 connection seal groove 123 and 12 both sides of the face of the central housing on be equipped with it is logical
Stomata 122, connection screw thread hole 124 and detent fit hole 125.
The right side cylinder body 13 is equipped with the second positioning counterbore 131, second connection through-hole 132 and the second dowel hole 133；
14 1 end margin of cylinder inner bore on right side cylinder body 13 is equipped with the second positioning counterbore 131；The right side cylinder body 13 with
The side end face that central housing 12 connects is equipped with several second connection through-holes 132 and the second dowel hole 133.
The left side cylinder body 11 is equipped with the first positioning counterbore 111, and central housing 12 is equipped with positioning step 121, right side
Cylinder body 13 is equipped with the second positioning counterbore 131；The left side cylinder body 11 and central housing 12 by the first positioning counterbore 111 and are determined
Position step 121 is cooperatively connected；The right side cylinder body 13 and central housing 12 pass through the second positioning counterbore 131 and positioning step 121
It is cooperatively connected.
The left side cylinder body 11 is equipped with the first connection through-hole 112 and the first dowel hole 113；Central housing 12 is equipped with
Connection screw thread hole 124 and detent fit hole 125；Right side cylinder body 13 is equipped with the second connection through-hole 132 and the second dowel hole
133；
The left side cylinder body 11 and central housing 12 are positioned by the first connection through-hole 112 and connection screw thread hole 124, first
Pin hole 113 and detent fit hole 125 are fixed；The central housing 12 and right side cylinder body 13 pass through connection screw thread hole 124 and the
Two connection through-holes 132, detent fit hole 125 and the second dowel hole 133 are fixed.
It further include connection sealing ring；The connection sealing ring is set in connection seal groove 123；The venthole 122
Edge is again provided with vent seal ring recess, is equipped with corresponding sealing ring in slot.
The present invention avoids the single too long predicament of cylinder body length while guaranteeing rack piston movement travel.With one
For the cylinder body of a cylinder inner bore diameter 210mm, the cylinder body length of drive shaft rotating distance angle 180 degree is 614mm, remains total
Length is constant, and a cylinder body of script is decomposed into 3 cylinder bodies, i.e. left side cylinder body 11, central housing 12 and right side cylinder body 13.
Wherein the length of central housing 12 is 276mm, and left side cylinder body 11 and the length of right side cylinder body 13 are 169mm, than
The length of 90 degree of drive shaft rotating distance angle is that the cylinder body of 361mm is more shorter, therefore under the conditions of prior art, completely may be used
To guarantee the geometric tolerance of cylinder inner bore circularity 0.05mm, the geometric tolerance of cylinder inner bore cylindricity 0.05mm.
In the prior art, the bottom connecting shaft hole of rack-and-pinion pneumatic actuator cylinder body 1, bottom connection screw thread, top
Connection screw thread and ventilation interface are the part that pneumatic actuator is connected with other valve accessories or valve, that is, cylinder body
Functional hole.Central housing 12 of the present invention assumes responsibility for these connection functions of cylinder body in the prior art, therefore bottom connects
Spindle hole, bottom connection screw thread, top connection screw thread and ventilation interface are processed on central housing.
In order to guarantee the connection precision of three cylinder bodies, it is machined with positioning step 121 at the both ends of central housing 12, with left side
The first positioning counterbore 111, the second positioning counterbore 131 processed on cylinder body 11 and right side cylinder body 13 are worked in coordination and are connect.Described
The matching relationship of rank and counterbore is transition fit, and fit tolerance is the upper deviation+0.02mm, and lower deviation -0.02mm is ensured that in this way
The geometric tolerance for the cylinder inner bore cylindricity 0.05mm that three cylinder bodies are assembled.
It is additionally provided with connection seal groove 123 and 122 seal groove of venthole at the both ends of central housing 12, is disposed therein
Sealing ring gas leakage when three cylinder bodies being prevented to assemble work.On left side cylinder body 11, central housing 12 and right side cylinder body 13
It is designed with the dowel hole worked in coordination.When three cylinder body assembly, the relative position of three cylinder bodies is fixed with positioning pin.
After can guaranteeing assembly by the position positioning of the positioning of connection step and the circumferencial direction for connecting counterbore, pin hole, three cylinder bodies
Unidirectional face ensure that aesthetics all in same level.
The axis hole of drive shaft is not provided on left side cylinder body 11 and right cylinder body 13, only there are cylinder inner bores 14, and and middle cylinder
The corresponding connection through-hole of 12 end-face helical of body.The two is attached by connector, so that actuator end cap is fixed on cylinder
On body 1.
The design principle of central housing 12 is that length must control in a scope of design value, so that rack piston fills
With into after cylinder body 1, the plastics guiding ring recess and seal groove of rack piston do not touch three cylinder bodies assembly during the motion
Seam crossing.Such design principle avoids rack piston guide collar and sealing ring and moves back and forth in seam crossing to fixture rack gear
The loss of piston guide circle and sealing ring.Corresponding, the design length of left side cylinder body 11 and right cylinder body 13 is to meet long stroke
Rack piston have enough movement travels.
Claims (8)
1. the rack-and-pinion pneumatic actuator of ultralong-stroke, including cylinder body (1), drive shaft (2) and rack piston (3)；The cylinder
Body (1) and drive shaft (2) are cooperatively connected, and drive shaft (2) is engaged with rack piston (3)；It is characterized in that: the cylinder body (1) includes
Left side cylinder body (11), central housing (12) and right side cylinder body (13)；The left side cylinder body (11), central housing (12) and right side cylinder
Body (13) interconnects, and is combined into cylinder body (1)；The drive shaft (2) and rack piston (3) are respectively positioned in central housing (12).
2. the rack-and-pinion pneumatic actuator of ultralong-stroke as described in claim 1, it is characterized in that: the left side cylinder body (11),
A cylinder inner bore (14) is equipped on central housing (12) and right side cylinder body (13)；Cylinder inner bore (14) penetrates through entire cylinder body
(1)；Cylinder inner bore (14) on three assembly cylinder-bodies is in the same size, and position is identical.
3. the rack-and-pinion pneumatic actuator of ultralong-stroke as claimed in claim 2, it is characterized in that: on the left side cylinder body (11)
Equipped with the first positioning counterbore (111), the first connection through-hole (112) and the first dowel hole (113)；It is described to be located at left side cylinder body
(11) (14) one end margin of cylinder inner bore on is equipped with the first positioning counterbore (111)；The left side cylinder body (11) and central housing
(12) side end face connected is equipped with several first connections through-hole (112) and the first dowel hole (113).
4. the rack-and-pinion pneumatic actuator of ultralong-stroke as claimed in claim 2, it is characterized in that: on the central housing (12)
Equipped with positioning step (121), venthole (122), connection seal groove (123), connection screw thread hole (124) and detent fit hole
(125)；Described cylinder inner bore (14) edges at two ends on central housing (12) is equipped with positioning step (121)；It is described fixed
It is additionally provided on position step (121) on connection seal groove (123) and the central housing (12) both sides of the face and is equipped with venthole
(122), connection screw thread hole (124) and detent fit hole (125).
5. the rack-and-pinion pneumatic actuator of ultralong-stroke as claimed in claim 2, it is characterized in that: on the right side cylinder body (13)
Equipped with the second positioning counterbore (131), the second connection through-hole (132) and the second dowel hole (133)；It is described to be located at right side cylinder body
(13) (14) one end margin of cylinder inner bore on is equipped with the second positioning counterbore (131)；The right side cylinder body (13) and central housing
(12) side end face connected is equipped with several second connections through-hole (132) and the second dowel hole (133).
6. the rack-and-pinion pneumatic actuator of ultralong-stroke as claimed in claim 2, it is characterized in that: on the left side cylinder body (11)
Equipped with the first positioning counterbore (111), central housing (12) is equipped with positioning step (121), and right side cylinder body (13) is equipped with second
Positioning counterbore (131)；The left side cylinder body (11) and central housing (12) pass through the first positioning counterbore (111) and positioning step
(121) it is cooperatively connected；The right side cylinder body (13) and central housing (12) pass through the second positioning counterbore (131) and positioning step
(121) it is cooperatively connected.
7. the rack-and-pinion pneumatic actuator of ultralong-stroke as claimed in claim 2, it is characterized in that: on the left side cylinder body (11)
Equipped with the first connection through-hole (112) and the first dowel hole (113)；Central housing (12) be equipped with connection screw thread hole (124) and
Detent fit hole (125)；Right side cylinder body (13) is equipped with the second connection through-hole (132) and the second dowel hole (133)；
The left side cylinder body (11) and central housing (12) pass through the first connection through-hole (112) and connection screw thread hole (124), first
Dowel hole (113) and detent fit hole (125) are fixed；The central housing (12) and right side cylinder body (13) pass through connection spiral shell
Pit (124) and the second connection through-hole (132), detent fit hole (125) and the second dowel hole (133) are fixed.
8. the rack-and-pinion pneumatic actuator of ultralong-stroke as claimed in claim 4, it is characterized in that: further including connection sealing ring；
The connection sealing ring is set in connection seal groove (123)；Venthole (122) edge is again provided with vent seal
Ring recess, slot is interior to be equipped with corresponding sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910627905.4A CN110220033A (en) | 2019-07-12 | 2019-07-12 | The rack-and-pinion pneumatic actuator of ultralong-stroke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910627905.4A CN110220033A (en) | 2019-07-12 | 2019-07-12 | The rack-and-pinion pneumatic actuator of ultralong-stroke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110220033A true CN110220033A (en) | 2019-09-10 |
Family
ID=67812400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910627905.4A Pending CN110220033A (en) | 2019-07-12 | 2019-07-12 | The rack-and-pinion pneumatic actuator of ultralong-stroke |
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