CN216447353U - Air spring type unidirectional and bidirectional pneumatic actuator - Google Patents
Air spring type unidirectional and bidirectional pneumatic actuator Download PDFInfo
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- CN216447353U CN216447353U CN202122601308.XU CN202122601308U CN216447353U CN 216447353 U CN216447353 U CN 216447353U CN 202122601308 U CN202122601308 U CN 202122601308U CN 216447353 U CN216447353 U CN 216447353U
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Abstract
The utility model discloses an air spring type unidirectional and bidirectional pneumatic actuator, and belongs to the technical field of pneumatic actuators. The air spring comprises a first air spring, a second air spring, a shaft, an upper sealing plate, an upper cover plate, a lower sealing plate and a nylon sleeve; the upper end of the first air spring is sealed by an upper sealing plate, and the lower end of the first air spring is sealed by an upper cover plate; the upper end of the second air spring is sealed by a lower cover plate, and the lower end of the second air spring is sealed by a lower sealing plate; the upper sealing plate and the lower sealing plate are both provided with hollow holes, the shaft penetrates through the hollow holes of the upper sealing plate and the lower sealing plate, and the shaft and the hollow holes are sealed through sealing rings. Because the pneumatic actuator is not provided with a piston structure, the running friction force is reduced, and the running obstruction of the pneumatic actuator is reduced; on a product requiring a larger thrust of the actuator, air springs with different sizes can be selected as an execution power element according to different strokes and output requirements, and a larger thrust can be conveniently provided according to requirements.
Description
Technical Field
The utility model relates to an air spring type unidirectional and bidirectional pneumatic actuator, and belongs to the technical field of pneumatic actuators.
Background
The pneumatic actuator is an actuating device driven by air pressure, and is also called a pneumatic actuating mechanism or a pneumatic device. The existing pneumatic actuator is a linear operation device based on an aluminum cylinder, a common double-acting cylinder can be regarded as a unidirectional pneumatic actuator, and a cylinder with a bidirectional rod can be regarded as a bidirectional pneumatic actuator. Under the general condition, a cylinder body is an aluminum profile, two ends of the cylinder body are provided with pressure casting aluminum seal covers, a piston is connected with a cylinder rod, and air inlet and outlet ports are arranged on two sides of the piston, so that the left and right movement of the piston can be realized, the left and right pneumatic movement of a piston rod is driven, and the one-direction and two-direction pneumatic execution function is realized.
At present, moving parts in the pneumatic actuator are a piston and a piston rod, a cylinder body does not move, a sealing element is arranged outside the piston and abuts against the inner wall of the cylinder body to form sealing, because the size of the piston and the size of the sealing element are larger, larger friction force can be generated, meanwhile, the abrasion is relatively fast, and the internal running speed of the piston is slower after air is introduced and exhausted; the problem is particularly obvious when the cylinder body is thicker and the piston is larger; in addition, when a large thrust force is required, a cylinder block is required to be thicker, and the cost is greatly increased.
Therefore, the air spring type unidirectional and bidirectional pneumatic actuator is designed, and the air spring type unidirectional and bidirectional pneumatic actuator has the advantages of higher running speed, longer service life and larger thrust because of no piston structure.
Disclosure of Invention
The technical problem to be solved by the utility model is as follows: the air spring type unidirectional and bidirectional pneumatic actuator solves the problems that an existing pneumatic actuator is of a piston structure, and the operation of the pneumatic actuator is hindered due to the fact that friction force on sealing pieces around a piston is too large.
The technical problem to be solved by the utility model is realized by adopting the following technical scheme:
an air spring type unidirectional and bidirectional pneumatic actuator comprises a first air spring, a second air spring, a shaft, an upper sealing plate, an upper cover plate, a lower sealing plate and a nylon sleeve;
the upper end of the first air spring is sealed by an upper sealing plate, and the lower end of the first air spring is sealed by an upper cover plate;
the upper end of the second air spring is sealed by a lower cover plate, and the lower end of the second air spring is sealed by a lower sealing plate;
the upper sealing plate and the lower sealing plate are both provided with hollow holes, the shaft penetrates through the hollow holes of the upper sealing plate and the lower sealing plate, and the shaft and the hollow holes are sealed through sealing rings;
the middle parts of the upper cover plate and the lower cover plate are respectively provided with a groove with a hollow hole, the upper cover plate and the lower cover plate are fixed together, the two grooves are oppositely spliced to form a cavity for accommodating the nylon sleeve, the end part of the nylon sleeve and the bottom of the groove are sealed and fixed through a sealing washer, the middle part of the shaft penetrates through the nylon sleeve, and the shaft and the inner wall of the nylon sleeve are sealed through the sealing washer;
the first air spring and the second air spring are respectively connected with the outside through at least one air hole.
As a preferable example, the two ends of the shaft are provided with limiting rings which are respectively positioned on the shaft above the upper sealing plate and below the lower sealing plate.
In a preferred embodiment, the upper end and the lower end of the first air spring are respectively fixed on the end surfaces of the upper closing plate and the upper cover plate through gland seals, and the upper end and the lower end of the second air spring are respectively fixed on the end surfaces of the lower cover plate and the lower closing plate through gland seals.
As a preferable example, the upper cover plate and the lower cover plate are fixed through assembling screws.
In a preferred embodiment, the side surface of the upper cover plate is provided with a first air hole and a second air hole, the first air hole penetrates through the upper cover plate and is communicated into the first air spring, the second air hole penetrates through the upper cover plate and the lower cover plate and is communicated into the second air spring, an air hole sealing ring is arranged at the position, where the second air hole penetrates through the contact surface of the upper cover plate and the lower cover plate, and a gap between the upper cover plate and the lower cover plate is sealed through the air hole sealing ring surrounding the second air hole.
In a preferred embodiment, the radius of the lower cover plate is larger than the radius of the first air spring or the second air spring after being deflated.
The utility model has the beneficial effects that:
(1) because the pneumatic actuator is not provided with a piston structure, the running friction force is reduced, and the running obstruction of the pneumatic actuator is reduced;
(2) on the product requiring larger actuator thrust, the air spring type pneumatic actuator has obvious effect, and air springs with different sizes can be selected as an execution power element according to different strokes and output requirements, so that larger thrust can be conveniently provided according to requirements.
Drawings
FIG. 1 is a schematic external view of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic view of the vent structure of the present invention;
FIG. 4 is a schematic cross-sectional view of a vent according to the present invention.
In the figure: 1. a first air spring; 2. a second air spring; 3. a shaft; 4. an upper sealing plate; 5. an upper cover plate; 6. a lower cover plate; 7. a lower sealing plate; 8. a nylon sleeve; 9. a seal ring; 10. a sealing gasket; 11. air holes; 12. assembling screws; 13. a limiting ring; 14. a gland; 15. a first air hole; 16. a second air hole; 17. an air hole sealing ring; 18. and (4) pressing a cover screw.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the utility model easy to understand, the utility model is further described with reference to the specific drawings.
Example 1
As shown in fig. 1 to 4, an air spring type unidirectional/bidirectional pneumatic actuator includes a first air spring 1, a second air spring 2, a shaft 3, an upper sealing plate 4, an upper cover plate 5, a lower cover plate 6, a lower sealing plate 7, and a nylon sleeve 8;
the upper end of the first air spring 1 is sealed by an upper sealing plate 4, and the lower end of the first air spring 1 is sealed by an upper cover plate 5;
the upper end of the second air spring 2 is sealed by a lower cover plate 6, and the lower end of the second air spring 2 is sealed by a lower sealing plate 7;
the upper sealing plate 4 and the lower sealing plate 7 are both provided with hollow holes, the shaft 3 penetrates through the hollow holes of the upper sealing plate 4 and the lower sealing plate 7, and the shaft 3 and the hollow holes are sealed through a sealing ring 9;
the middle parts of the upper cover plate 5 and the lower cover plate 6 are respectively provided with a groove with a hollow hole, the upper cover plate 5 and the lower cover plate 6 are fixed together, the two grooves are oppositely spliced to form a cavity for accommodating the nylon sleeve 8, the end part of the nylon sleeve 8 and the bottom of the groove are sealed and fixed through a sealing washer 10, the middle part of the shaft 3 penetrates through the nylon sleeve 8, and the shaft 3 and the inner wall of the nylon sleeve 8 are sealed through a sealing washer 9;
the sealing ring 9 and the sealing washer 10 are both made of rubber sealing materials.
The nylon sleeve 8 has the following advantages: (1) the service life is long, and the replacing time and the maintenance cost can be greatly saved; (2) the lubricating performance can be kept for a long time after the grease is added for one time; (3) the resistance to impact, fatigue and vibration is high; (4) the noise is low; (5) the weight is light, and the assembly is easy; (6) can be used in metallurgical industry without being corroded by medicine.
The first air spring 1 and the second air spring 2 are respectively connected with the outside through at least one air hole 11.
The upper cover plate 5 and the lower cover plate 6 are fixed by assembling screws 12.
The shaft 3 is in sealing contact with the hollow holes of the upper sealing plate 4 and the lower sealing plate 7 and the nylon sleeve 8 through the sealing ring 9 to form a dynamic sealing structure.
The shaft 3 can move upwards by inflating the first air spring 1 and deflating the second air spring 2; conversely, when the first air spring 1 is deflated and the second air spring 2 is inflated, the shaft 3 can move downwards. Therefore, the pneumatic actuator can be used as a unidirectional and bidirectional pneumatic actuator.
Example 2
As shown in fig. 1 and 2, the shaft 3 is provided with stop rings 13 at both ends thereof, and the stop rings 13 are respectively located on the shaft 3 above the upper sealing plate 4 and below the lower sealing plate 7.
The up-and-down movement stroke of the shaft 3 is limited by the limiting ring 13.
Example 3
As shown in fig. 1 and 2, the upper and lower ends of the first air spring 1 are hermetically fixed to the end surfaces of the upper sealing plate 4 and the upper cover plate 5 by the pressing covers 14, and the upper and lower ends of the second air spring 2 are hermetically fixed to the end surfaces of the lower cover plate 6 and the lower sealing plate 7 by the pressing covers 14.
The gland 14 is fixed by a gland screw 18, the upper end and the lower end of the first air spring 1 and the lower end of the second air spring 2 are sealed, the disassembly is convenient, the air springs with various specifications can be replaced conveniently, only the air springs need to be replaced, and different thrust can be formed without replacing other parts. Compared with a cylinder type actuator, the variable thrust is more convenient.
Example 4
As shown in fig. 3 and 4, a first air hole 15 and a second air hole 16 are formed in the side surface of the upper cover plate 5, the first air hole 15 penetrates through the upper cover plate 5 and is communicated into the first air spring 1, the second air hole 16 penetrates through the upper cover plate 5 and the lower cover plate 6 and is communicated into the second air spring 2, an air hole sealing ring 17 is arranged at the position where the second air hole 16 penetrates through the contact surface of the upper cover plate 5 and the lower cover plate 6, and a gap between the upper cover plate 5 and the lower cover plate 6 is sealed through the air hole sealing ring 17 surrounding the second air hole 16. The air hole sealing ring 17 is made of rubber materials.
A first air hole 15 and a second air hole 16 which are respectively communicated with the first air spring 1 and the second air spring 2 are arranged, and each air hole 11 is respectively connected with one air charging and discharging pipeline, so that the air charging and discharging operations of the first air spring 1 and the second air spring 2 can be realized.
Example 5
The radius of the lower cover plate 6 is larger than the radius of the deflated first air spring 1 or second air spring 2.
The radius of the lower cover plate 6 is large, so that the lower cover plate 6 can be conveniently used as a fixed mounting seat for mounting and fixing the whole actuator.
In conclusion, it has the following advantages:
(1) because the piston structure is not arranged, the friction force of a thick piston sealing element for hindering the linear operation is reduced, and the obstruction of the operation of the pneumatic actuator is reduced;
(2) on the product requiring larger actuator thrust, the air spring type pneumatic actuator has obvious effect, and air springs with different sizes can be selected as an execution power element according to different strokes and output requirements, so that larger thrust can be conveniently provided according to requirements.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (6)
1. An air spring type unidirectional and bidirectional pneumatic actuator is characterized by comprising a first air spring, a second air spring, a shaft, an upper sealing plate, an upper cover plate, a lower sealing plate and a nylon sleeve;
the upper end of the first air spring is sealed by an upper sealing plate, and the lower end of the first air spring is sealed by an upper cover plate;
the upper end of the second air spring is sealed by a lower cover plate, and the lower end of the second air spring is sealed by a lower sealing plate;
the upper sealing plate and the lower sealing plate are both provided with hollow holes, the shaft penetrates through the hollow holes of the upper sealing plate and the lower sealing plate, and the shaft and the hollow holes are sealed through sealing rings;
the middle parts of the upper cover plate and the lower cover plate are respectively provided with a groove with a hollow hole, the upper cover plate and the lower cover plate are fixed together, the two grooves are oppositely spliced to form a cavity for accommodating the nylon sleeve, the end part of the nylon sleeve and the bottom of the groove are sealed and fixed through a sealing washer, the middle part of the shaft penetrates through the nylon sleeve, and the shaft and the inner wall of the nylon sleeve are sealed through the sealing washer;
the first air spring and the second air spring are respectively connected with the outside through at least one air hole.
2. The air spring type uni-directional and bi-directional pneumatic actuator of claim 1 wherein said shaft is provided with stop rings at both ends thereof, said stop rings being located on said shaft above said upper sealing plate and below said lower sealing plate, respectively.
3. The air spring type uni-directional and bi-directional pneumatic actuator as claimed in claim 1, wherein the first air spring has upper and lower ends fixed to the upper and lower cover plates by gland seals, and the second air spring has upper and lower ends fixed to the lower and lower cover plates by gland seals.
4. The air spring type unidirectional/bidirectional pneumatic actuator as claimed in claim 1, wherein the upper cover plate and the lower cover plate are fixed to each other by means of assembly screws.
5. The air spring type uni-directional and bi-directional pneumatic actuator as claimed in claim 1, wherein the upper cover plate has a first air hole and a second air hole on the side, the first air hole passes through the upper cover plate and enters the first air spring, the second air hole passes through the upper cover plate and the lower cover plate and enters the second air spring, wherein the second air hole passes through the contact surface of the upper cover plate and the lower cover plate and is provided with an air hole sealing ring, and the air hole sealing ring surrounding the second air hole seals the gap between the upper cover plate and the lower cover plate.
6. The air spring type uni-directional and bi-directional pneumatic actuator of claim 1 wherein the lower cover radius is greater than the radius of the first or second air spring after deflation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122601308.XU CN216447353U (en) | 2021-10-27 | 2021-10-27 | Air spring type unidirectional and bidirectional pneumatic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122601308.XU CN216447353U (en) | 2021-10-27 | 2021-10-27 | Air spring type unidirectional and bidirectional pneumatic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216447353U true CN216447353U (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122601308.XU Active CN216447353U (en) | 2021-10-27 | 2021-10-27 | Air spring type unidirectional and bidirectional pneumatic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216447353U (en) |
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2021
- 2021-10-27 CN CN202122601308.XU patent/CN216447353U/en active Active
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