CN204533748U - Low-friction piston formula actuator - Google Patents
Low-friction piston formula actuator Download PDFInfo
- Publication number
- CN204533748U CN204533748U CN201520095086.0U CN201520095086U CN204533748U CN 204533748 U CN204533748 U CN 204533748U CN 201520095086 U CN201520095086 U CN 201520095086U CN 204533748 U CN204533748 U CN 204533748U
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- cylinder body
- piston
- push rod
- lower cylinder
- type circle
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Abstract
The utility model relates to low-friction piston formula actuator.Upper cylinder body and lower cylinder body are arranged symmetrically with face-to-face up and down, and intermediate hsg is installed between upper cylinder body and lower cylinder body, and upper cylinder body and lower cylinder body are fastenedly connected integral; Piston is arranged in the endoporus of intermediate hsg, is provided with piston seal guidance set between outside piston surface and intermediate hsg bore area; Push rod is connected to piston centre, and the first Compress Spring is arranged between piston upper surface and upper cylinder body internal surface, and the second Compress Spring is arranged between piston lower surface and lower cylinder body internal surface; Lower cylinder body is fixedly mounted on support, and cradle top is provided with push rod jack, and push rod is from up to down inserted in support from this push rod jack, and push rod lower end is the external output terminal of actuator.The Velocity Overshoot that the utility model produces when can eliminate actuator's quick adjustment, and guiding is accurately, and surface friction drag is little, actuator can be responded fast to control signal, thus reach fine adjustment object.
Description
Technical field
The utility model relates to piston actuator, specifically a kind of low-friction piston formula actuator with quick response, highi degree of accuracy adjusting function.
Background technique
In prior art, most of piston actuator adopts the rubber-like seal rings such as O type circle, Y shape circle as dynamic piston seal, adopts Teflon tap as piston guide part.But in piston action process, owing to having larger magnitude of interference when rubber is installed, therefore surface friction drag is larger, have a strong impact on the adjusting function of actuator, design the pneumatic piston actuating mechanism produced only to use as the drive unit of general working condition, the application demand of the regulating valve of a thousandth or the higher modulability of requirement can not be met.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of low-friction piston formula actuator is provided, its structure is ingenious, reasonable in design, the Velocity Overshoot produced when can eliminate actuator's quick adjustment, and guiding is accurately, and surface friction drag is little, actuator can be responded fast to control signal, thus reach fine adjustment object.
Technological scheme according to the utility model provides: low-friction piston formula actuator, is characterized in that: comprise upper cylinder body, the first Compress Spring, push rod, piston, intermediate hsg, lower cylinder body and the second Compress Spring; Described upper cylinder body and lower cylinder body are arranged symmetrically with face-to-face up and down, and intermediate hsg is installed between upper cylinder body and lower cylinder body, and upper cylinder body and lower cylinder body are fastenedly connected integral by link; Described piston is arranged in the endoporus of intermediate hsg, is provided with piston seal guidance set between outside piston surface and intermediate hsg bore area; Described push rod is connected to piston centre, and described first Compress Spring is arranged between piston upper surface and upper cylinder body internal surface, and described second Compress Spring is arranged between piston lower surface and lower cylinder body internal surface; Described lower cylinder body is fixedly mounted on support, and cradle top is provided with push rod jack, and described push rod is from up to down inserted in support from this push rod jack, and push rod lower end is the external output terminal of actuator.
As further improvement of the utility model, described link comprises hexagon head bolt and hexagon nut, the outer periphery of described upper cylinder body, intermediate hsg and lower cylinder body is along being respectively equipped with several equally distributed connecting through holes, described hexagon head bolt, through also tight with hexagon nut after the connecting through hole on upper cylinder body, intermediate hsg and lower cylinder body, makes upper cylinder body, intermediate hsg and lower cylinder body be fastenedly connected integral.
As further improvement of the utility model, be respectively equipped with an O type circle between the contact fitting surface of described upper cylinder body, lower cylinder body and intermediate hsg, an O type circle is used for the static seal between upper cylinder body, intermediate hsg and lower cylinder body.
As further improvement of the utility model, described piston seal guidance set comprises arc ptfe ring and tetrafluoro O type circle; Described intermediate hsg bore area is from up to down provided with first ring connected in star, the second annular groove and the 3rd annular groove in turn, described first ring connected in star and the 3rd annular groove consistent size, first ring connected in star and the 3rd annular groove are respectively provided with an arc ptfe ring, be provided with gap between described outside piston side face and intermediate hsg bore area, led by two arc ptfe rings between piston and intermediate hsg; Be provided with a tetrafluoro O type circle in described second annular groove, piston and tetrafluoro O type circle trace interference fit seal.
As further improvement of the utility model, the inner headed face of described arc ptfe ring is set to arc shaped surface.
As further improvement of the utility model, described piston is the tubbiness of upper and lower end symmetry.
As further improvement of the utility model, described outside piston surface is provided with fine and close PTFE coating.
As further improvement of the utility model, described piston centre is provided with endoporus, described push rod to be inserted in this endoporus and to be locked by locking nut, described push rod outer surface is provided with annular seal groove, be provided with the 2nd O type circle in described annular seal groove, the 2nd O type circle is used for the static seal that push rod contacts with piston.
As further improvement of the utility model, the base plane of described lower cylinder body is provided with several equally distributed installation through holes, described cradle top plane is provided with several equally distributed tapped blind holes, described tapped blind hole and installation through hole one_to_one corresponding, lower cylinder body and support are fastenedly connected by being contained in the hex head screw installed in through hole and tapped blind hole.
As further improvement of the utility model, described cradle top plane is provided with annular groove, is provided with the 3rd O type circle in described annular groove, and the 3rd O type circle is used for the sealing between lower cylinder body base plane and cradle top plane.
As further improvement of the utility model, in the push rod jack of described cradle top, axle sleeve is installed, between axle sleeve and push rod, is provided with push rod pilot seal assembly.
As further improvement of the utility model, described push rod pilot seal assembly comprises the 4th O type circle, the 5th O type circle and without oily lining; The outer round surface of described axle sleeve is provided with cylindrical groove, is provided with a 4th O type circle in per pass cylindrical groove, and the 4th O type circle is used for the sealing between support and axle sleeve; The bore area of described axle sleeve is provided with some roads inner hole groove, is provided with a 5th O type circle in per pass inner hole groove, and the 5th O type circle is used for the sealing between push rod and axle sleeve; Also be provided with an installation cavity in described inner hole of shaft sleeve, be describedly contained in this installation cavity without oily lining, be connected with the bottom stage of installation cavity without oily lining one end, described push rod be slidably matched without oily lining.
As further improvement of the utility model, described push rod lower end is provided with outside thread, described frame bottom is provided with manhole, described manhole periphery is provided with several equally distributed attachment holes, forms the linkage structure externally exported together with the manhole of push rod outside thread and frame bottom and attachment hole.
compared with prior art, tool has the following advantages the utility model:
(1) piston upper surface, in the utility model and between upper cylinder body internal surface, the first Compress Spring is set, second Compress Spring is set between piston lower surface and lower cylinder body internal surface, the overshoot phenomenon that first Compress Spring and the second Compress Spring produce when can offset actuator's quick acting in the process that compression stroke and release compression stroke occur, significantly improves stability and the modulability of actuator.
(2), be the tubbiness of upper and lower end symmetry in the utility model as the piston of the converting member of air pressure and thrust, and outside piston surface is provided with fine and close PTFE coating, and barrel-like structure makes piston can realize light under the prerequisite of holding structure intensity; PTFE coating effectively can reduce surface friction drag during piston movement, can also play that piston interface is antirust, antisepsis simultaneously, has stronger adaptive capacity to environment.
(3), the utility model adopts two arc ptfe rings to provide guiding to piston, and the area of contact of arc ptfe ring and piston is little, and surface friction drag is little of negligible, can not weaken guide effect again simultaneously.
(4), the utility model adopts tetrafluoro O type circle as the Sealing of piston motive sealing, and tetrafluoro O type circle is compared with General Purpose Rubber O type circle, and assembling magnitude of interference requires low, greatly can reduce surface friction drag, and there is stronger ageing resistance, greatly reduce maintenance cost, save social resources.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the A portion enlarged diagram in Fig. 1.
Fig. 3 is the structural representation of arc ptfe ring in Fig. 1.
Fig. 4 is the B portion enlarged diagram in Fig. 1.
Fig. 5 is the structural representation of piston in Fig. 1.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in the figure, the low-friction piston formula actuator in embodiment primarily of upper cylinder body 1, first Compress Spring 2, locking nut 3, push rod 4, piston 5, intermediate hsg 6, an O type circle 7, arc ptfe ring 8, tetrafluoro O type circle the 9, the 2nd O type circle 10, hexagon head bolt 11, the 3rd O type circle 12, axle sleeve 13, the 4th O type circle the 14, the 5th O type circle 15, without the part such as oily lining 16, support 17, second hexagon head bolt 18, lower cylinder body 19, second Compress Spring 20 and hexagon nut 21 composition.
As shown in Figure 1, described upper cylinder body 1 is arranged symmetrically with face-to-face up and down with lower cylinder body 19, and intermediate hsg 6 is installed between upper cylinder body 1 and lower cylinder body 19, and upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19 are fastenedly connected integral by link.Link in embodiment is mainly made up of hexagon head bolt 11 and hexagon nut 21, the outer periphery of described upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19 is along being respectively equipped with several equally distributed connecting through holes, described hexagon head bolt 11, through also tight with hexagon nut 21 after the connecting through hole on upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19, makes upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19 be fastenedly connected integral.
As shown in Figure 1 and Figure 2, in the utility model embodiment, described upper cylinder body 1, be respectively equipped with O type circle the 7, an one O type circle 7 between lower cylinder body 19 and the contact fitting surface of intermediate hsg 6 for the static seal between upper cylinder body 1, intermediate hsg 6 and lower cylinder body 19.
As shown in Fig. 1 ~ Fig. 3, described piston 5 is arranged in the endoporus of intermediate hsg 6, is provided with piston seal guidance set between piston 5 outer round surface and intermediate hsg 6 bore area, piston seal guidance set in embodiment forms primarily of arc ptfe ring 8 and tetrafluoro O type circle 9, described intermediate hsg 6 bore area is from up to down provided with first ring connected in star in turn, second annular groove and the 3rd annular groove, described first ring connected in star and the 3rd annular groove consistent size, first ring connected in star and the 3rd annular groove are respectively provided with an arc ptfe ring 8, gap is provided with between described piston 5 outer peripheral surface and intermediate hsg 6 bore area, led by two arc ptfe rings 8 between piston 5 and intermediate hsg 6, arc ptfe ring 8 is little with the area of contact of piston 5, surface friction drag is little of negligible, guide effect can not be weakened again simultaneously.A tetrafluoro O type circle 9 is provided with in described second annular groove, piston 5 and the micro-interference fit of tetrafluoro O type circle 9 seal, tetrafluoro O type circle 9 is compared with General Purpose Rubber O type circle, assembling magnitude of interference requires low, greatly can reduce surface friction drag, and there is stronger ageing resistance, greatly reduce maintenance cost, save social resources.
As shown in Figure 5, in the utility model embodiment, described piston 5 is the tubbiness of upper and lower end symmetry, and piston 5 outer round surface is provided with fine and close PTFE coating 22.The inner headed face of described arc ptfe ring 8 is set to arc shaped surface.Barrel-like structure makes piston 5 can realize light under the prerequisite of holding structure intensity; PTFE coating 22 effectively can reduce surface friction drag when piston 5 moves, and can also play that piston 5 surface of contact is antirust, antisepsis simultaneously, has stronger adaptive capacity to environment.
As shown in Figure 1, described push rod 4 is connected to piston 5 center, and piston 5 center is provided with endoporus, and described push rod 4 to be inserted in this endoporus and to be locked by locking nut 3; Described push rod 4 outer surface is provided with annular seal groove, is provided with the static seal that the 2nd O type circle the 10, two O type circle 10 contacts with piston 5 for push rod 4 in described annular seal groove.
As shown in Figure 1, described first Compress Spring 2 is arranged between piston 5 upper surface and upper cylinder body 1 internal surface, and described second Compress Spring 20 is arranged between piston 5 lower surface and lower cylinder body 19 internal surface; When first Compress Spring 2, second Compress Spring 20 is with piston 5 action, compression stroke occurs and discharges can changing by reverse drive of compression stroke, the overshoot phenomenon produced when can offset actuator's quick acting, significantly improves stability and the modulability of actuator.
As shown in Figure 1, described lower cylinder body 19 is fixedly mounted on support 17, the base plane of lower cylinder body 19 is provided with several equally distributed installation through holes, described support 17 top planes is provided with several equally distributed tapped blind holes, described tapped blind hole and installation through hole one_to_one corresponding, lower cylinder body 19 and support 17 are fastenedly connected by being contained in the hex head screw 18 installed in through hole and tapped blind hole; Described support 17 top planes is provided with annular groove, is provided with the 3rd O type circle the 12, three O type circle 12 for the sealing between lower cylinder body 19 base plane and support 17 top planes in described annular groove.
As shown in Figure 1, described support 17 top is provided with push rod jack, and described push rod 4 is from up to down inserted in support 17 from this push rod jack; In the push rod jack at described support 17 top, axle sleeve 13 is installed, between axle sleeve 13 and push rod 4, is provided with push rod pilot seal assembly.As shown in Figure 4, it is primarily of the 4th O type circle the 14, the 5th O type circle 15 and form without oily lining 16 for the structure of described push rod pilot seal assembly; The outer round surface of described axle sleeve 13 is provided with cylindrical groove, is provided with the 4th O type circle the 14, a four O type circle 14 for the sealing between support 17 and axle sleeve 13 in per pass cylindrical groove; The bore area of described axle sleeve 13 is provided with some roads inner hole groove, is provided with the 5th O type circle the 15, a five O type circle 15 for the sealing between push rod 4 and axle sleeve 13 in per pass inner hole groove; Also be provided with an installation cavity in described axle sleeve 13 endoporus, be describedly contained in this installation cavity without oily lining 16, be connected with the bottom stage of installation cavity without oily lining 16 one end, described push rod 4 be slidably matched without oily lining 16.
As shown in Figure 1, described push rod 4 lower end is the external output terminal of actuator.Push rod 4 lower end is provided with outside thread, is provided with manhole bottom described support 17, and described manhole periphery is provided with several equally distributed attachment holes, and push rod 4 outside thread forms the linkage structure externally exported together with the manhole bottom support 17 and attachment hole.
Claims (10)
1. low-friction piston formula actuator, is characterized in that: comprise upper cylinder body (1), the first Compress Spring (2), push rod (4), piston (5), intermediate hsg (6), lower cylinder body (19) and the second Compress Spring (20); Described upper cylinder body (1) and lower cylinder body (19) are arranged symmetrically with face-to-face up and down, and intermediate hsg (6) is installed between upper cylinder body (1) and lower cylinder body (19), and upper cylinder body (1) and lower cylinder body (19) are fastenedly connected integral by link; Described piston (5) is arranged in the endoporus of intermediate hsg (6), is provided with piston seal guidance set between piston (5) outer round surface and intermediate hsg (6) bore area; Described push rod (4) is connected to piston (5) center, described first Compress Spring (2) is arranged between piston (5) upper surface and upper cylinder body (1) internal surface, and described second Compress Spring (20) is arranged between piston (5) lower surface and lower cylinder body (19) internal surface; Described lower cylinder body (19) is fixedly mounted on support (17), and support (17) top is provided with push rod jack, and described push rod (4) is from up to down inserted in support (17) from this push rod jack, and push rod (4) lower end is the external output terminal of actuator.
2. low-friction piston formula actuator as claimed in claim 1, it is characterized in that: described link comprises hexagon head bolt (11) and hexagon nut (21), the outer periphery of described upper cylinder body (1), intermediate hsg (6) and lower cylinder body (19) is along being respectively equipped with several equally distributed connecting through holes, described hexagon head bolt (11) is through using hexagon nut (21) after the connecting through hole on upper cylinder body (1), intermediate hsg (6) and lower cylinder body (19) and tightly, making upper cylinder body (1), intermediate hsg (6) and lower cylinder body (19) be fastenedly connected integral.
3. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described upper cylinder body (1), be respectively equipped with an O type circle (7) between lower cylinder body (19) and the contact fitting surface of intermediate hsg (6).
4. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described piston seal guidance set comprises arc ptfe ring (8) and tetrafluoro O type circle (9); Described intermediate hsg (6) bore area is from up to down provided with first ring connected in star, the second annular groove and the 3rd annular groove in turn, described first ring connected in star and the 3rd annular groove consistent size, first ring connected in star and the 3rd annular groove are respectively provided with an arc ptfe ring (8), be provided with gap between described piston (5) outer peripheral surface and intermediate hsg (6) bore area, led by two arc ptfe rings (8) between piston (5) and intermediate hsg (6); Be provided with tetrafluoro O type circle (9) in described second annular groove, piston (5) and tetrafluoro O type circle (9) micro-interference fit seal.
5. low-friction piston formula actuator as claimed in claim 4, is characterized in that: the inner headed face of described arc ptfe ring (8) is set to arc shaped surface.
6. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described piston (5) outer round surface is provided with fine and close PTFE coating (22).
7. low-friction piston formula actuator as claimed in claim 1, is characterized in that: described piston (5) center is provided with endoporus, and described push rod (4) to be inserted in this endoporus and to be locked by locking nut (3); Described push rod (4) outer surface is provided with annular seal groove, is provided with the 2nd O type circle (10) in described annular seal groove.
8. low-friction piston formula actuator as claimed in claim 1, it is characterized in that: the base plane of described lower cylinder body (19) is provided with several equally distributed installation through holes, described support (17) top planes is provided with several equally distributed tapped blind holes, described tapped blind hole and installation through hole one_to_one corresponding, lower cylinder body (19) and support (17) are fastenedly connected by being contained in the hex head screw (18) installed in through hole and tapped blind hole; Described support (17) top planes is provided with annular groove, is provided with the 3rd O type circle (12) in described annular groove.
9. low-friction piston formula actuator as claimed in claim 1, is characterized in that: be provided with axle sleeve (13) in the push rod jack at described support (17) top, is provided with push rod pilot seal assembly between axle sleeve (13) and push rod (4).
10. low-friction piston formula actuator as claimed in claim 9, is characterized in that: described push rod pilot seal assembly comprises the 4th O type circle (14), the 5th O type circle (15) and without oily lining (16); The outer round surface of described axle sleeve (13) is provided with cylindrical groove, is provided with a 4th O type circle (14) in per pass cylindrical groove; The bore area of described axle sleeve (13) is provided with some roads inner hole groove, is provided with a 5th O type circle (15) in per pass inner hole groove; Also be provided with an installation cavity in described axle sleeve (13) endoporus, be describedly contained in this installation cavity without oily lining (16), be connected with the bottom stage of installation cavity without oily lining (16) one end, described push rod (4) be slidably matched without oily lining (16).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520095086.0U CN204533748U (en) | 2015-02-10 | 2015-02-10 | Low-friction piston formula actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520095086.0U CN204533748U (en) | 2015-02-10 | 2015-02-10 | Low-friction piston formula actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204533748U true CN204533748U (en) | 2015-08-05 |
Family
ID=53747755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520095086.0U Withdrawn - After Issue CN204533748U (en) | 2015-02-10 | 2015-02-10 | Low-friction piston formula actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204533748U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633248A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Low-frictional piston type actuator |
-
2015
- 2015-02-10 CN CN201520095086.0U patent/CN204533748U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633248A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Low-frictional piston type actuator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150805 Effective date of abandoning: 20171114 |
|
| AV01 | Patent right actively abandoned |