Lifting and rotating pneumatic actuator

Abstract

The lifting rotary pneumatic actuator comprises a cylinder barrel, a front end cover, a rear end cover, a piston, a piston rod and a guide sleeve, the front end cover and the rear end cover are arranged at the two ends of the cylinder barrel respectively, the piston is connected into the cylinder barrel in a sliding mode, and the front end cover and the rear end cover are provided with air inlet ends used for controlling the piston to move. The piston is connected with a piston rod penetrating through the front end cover and the rear end cover, the rear end cover is fixedly connected with a guide sleeve, and the guide sleeve is provided with a guide groove used for controlling linear feeding or / and rotary feeding of the piston rod. The air inlet ends of the front end cover and the rear end cover are externally connected with an air source to form an air flow loop, the piston is controlled by air pressure to drive the piston rod to move up and down, in the moving process of the piston rod, the piston rod is forced to linearly feed or rotationally feed along the guide groove through the guide sleeve, and the shape of the guide groove can be customized according to actual requirements. The application range is wide.

Description

Technical Field

[0001] The utility model relates to the technical field of actuators, and particularly relates to a lifting rotary pneumatic actuator. Background Technique

[0002] In many working conditions where pneumatic actuators are applied, it is required that the output end of the actuator realizes the linear feed in the first half section and the rotary feed in the second half section. However, traditional actuators can only perform linear motions and cannot meet the requirements of this special working condition. The fork-type pneumatic actuator is an actuator that controls the rotation of valves such as ball valves, butterfly valves, and plug valves to open or close. Through the guidance of the guiding groove structure in its internal fork member, the linear motion of the cylinder is converted into a rotary motion. Combining this feature, a lifting rotary pneumatic actuator is introduced. Summary of the Invention

[0003] In order to overcome the deficiencies of the background technique, the technical solution adopted by the utility model is a lifting rotary pneumatic actuator, which includes a cylinder barrel, a front end cover, a rear end cover, a piston, a piston rod, and a guide sleeve. The front end cover and the rear end cover are respectively provided at both ends of the cylinder barrel. A piston is slidably connected in the cylinder barrel, and the front end cover and the rear end cover are provided with an air inlet end for controlling the movement of the piston. The piston is connected with a piston rod that penetrates through the front end cover and the rear end cover. The rear end cover is fixedly connected with a guide sleeve, and the guide sleeve is provided with a guiding groove for controlling the linear feed or / and rotary feed of the piston rod.

[0004] Adopting the above technical solution, the air inlet ends of the front end cover and the rear end cover are externally connected to a gas source to form an air flow circuit. The piston is driven by air pressure to drive the piston rod to move up and down. During the movement of the piston rod, the piston rod is forced to linearly feed or rotary feed along the guiding groove through the guide sleeve, and the shape of the guiding groove can be customized according to actual requirements, with a wide range of applications.

[0005] The utility model is further arranged such that two groups of guiding grooves are rotationally distributed on the guide sleeve. One end of the piston rod is provided with a pin shaft adapted to the guiding groove. The piston rod linearly moves up and down / rotates up and down along the guiding groove through the pin shaft. A set screw for fixing the pin shaft is provided at the top of the piston rod.

[0006] Furthermore, the guiding groove includes a straight groove and an arc groove that are smoothly connected to each other.

[0007] Adopting the above technical solution, when the pin shaft enters the straight groove, the piston rod moves linearly. When the pin shaft enters the arc groove, the piston rod rotates relative to the front end cover, the rear end cover, and the piston, thereby realizing the linear and rotary combined feed action of the piston rod during the transmission process. The overall structure is simple and the operation is stable.

[0008] The present utility model is further configured such that snap rings for connecting the piston rod are provided on both the upper and lower sides of the piston, a clamping groove adapted to the snap ring is provided on the piston rod, retaining rings for limiting are provided on the front end cover and the rear end cover in the direction towards the piston, the thickness h of the snap ring is less than the height H of the retaining ring, and the longitudinal length Z of the guiding groove is greater than the spacing Z between adjacent retaining rings.

[0009] With the above technical solution, when the piston moves up and down, the snap ring is prevented from touching the front end cover / rear end cover by the retaining ring, so as to avoid the snap ring being impacted and disengaged. At the same time, the stroke of the piston is controlled by the retaining ring, thereby preventing the pin shaft from touching the two ends of the guiding groove and avoiding the pin shaft from being impacted to maintain the stability of the structure.

[0010] The present utility model is further configured such that the guiding sleeve is provided with an installation portion, and the installation portion is provided with installation holes distributed in a circumferential manner. The guiding sleeve is threadedly connected to the rear end cover through the installation holes. The front end cover and the rear end cover are provided with screws distributed in a circumferential manner. The front end cover is threadedly connected to the cylinder barrel and the rear end cover through the screws, and a sealing ring is provided between the cylinder barrel and the front end cover / rear end cover.

[0011] With the above technical solution, the rear end cover is provided with inner and outer two - ring distributed threaded holes and through - holes. The guiding sleeve is threadedly connected to the rear end cover through screws passing through the installation holes. The front end cover is provided with threaded holes adapted to the through - holes. One end of the screw is threadedly connected to the front end cover, and the other end is connected to the rear end cover through a nut, so that the front end cover and the rear end cover are clamped at both ends of the cylinder barrel, and the overall structure is simple and the installation is convenient.

[0012] The present utility model is further configured such that the front end cover / rear end cover is provided with a central hole adapted to the piston rod, and a sealing ring and a guiding belt abutting against the piston rod are provided in the central hole. Sealing rings and guiding belts abutting against the cylinder barrel are provided on the outer side of the piston.

[0013] With the above technical solution, the guiding belt is an alloy wear - resistant ring. The air tightness of the cylinder part is maintained by the sealing ring to prevent air leakage in the cylinder part and improve the transmission efficiency. The wear - resistant effect of the piston and the piston rod is increased by the guiding belt to improve the service life of the product.

[0014] Compared with the prior art, the beneficial effects of the present utility model are:

[0015] The air inlet ends of the front end cover and the rear end cover are externally connected to an air source to form an air flow circuit. The piston is driven to move up and down by air pressure to drive the piston rod. During the movement of the piston rod, the piston rod is forced to linearly feed or rotationally feed along the guiding groove through the guiding sleeve, so as to meet specific control action requirements.

[0016] The following further describes the embodiments of the present utility model with reference to the accompanying drawings. Description of the Drawings

[0017] Figure 1 Isometric view of the present utility model;

[0018] Figure 2 Half-sectional view of the present utility model;

[0019] Figure 3 Of the present utility model Figure 1 Partial enlarged view of the view in the direction of A of the present utility model;

[0020] Figure 4 Of the present utility model Figure 2 Partial enlarged view of the view in the direction of B of the present utility model;

[0021] Wherein: 1 - cylinder barrel, 2 - front end cover, 3 - rear end cover, 4 - piston, 5 - piston rod, 6 - guide sleeve, 7 - pin shaft, 8 - set screw, 9 - snap ring, 10 - retaining ring, 11 - screw rod, 12 - sealing ring, 13 - guide strip, 21 - central hole, 51 - clamping groove, 61 - guide groove, 62 - straight groove, 63 - arc groove, 64 - mounting portion, 65 - mounting hole, 100 - air inlet end; Specific embodiments

[0022] As Figure 1 , 2 shown, this embodiment provides a lifting rotary pneumatic actuator, including a cylinder barrel 1, a front end cover 2, a rear end cover 3, a piston 4, a piston rod 5 and a guide sleeve 6. The two ends of the cylinder barrel 1 are respectively provided with a front end cover 2 and a rear end cover 3. A piston 4 is slidably connected in the cylinder barrel 1, and the front end cover 2 and the rear end cover 3 are provided with an air inlet end 100 for controlling the movement of the piston 4. The piston 4 is connected with a piston rod 5 passing through the front end cover 2 and the rear end cover 3. The rear end cover 3 is fixedly connected with a guide sleeve 6, and the guide sleeve 6 is provided with a guide groove 61 for controlling the linear feed or / and rotary feed of the piston rod 5.

[0023] Combined with Figure 3 shown, in this embodiment, the guide sleeve 6 supports and rotatably distributes two groups of guide grooves 61. One end of the piston rod 5 is provided with a pin shaft 7 adapted to the guide groove 61. The piston rod 5 linearly moves up and down / rotates up and down along the guide groove 61 through the pin shaft 7. A set screw 8 for fixing the pin shaft 7 is provided at the top of the piston rod 5. The guide groove 61 includes a straight groove 62 and an arc groove 63 that are smoothly connected to each other. It is worth mentioning that the structure of the guide groove 61 of the present utility model is not limited to a straight structure, an arc structure, or a combination structure of a straight line and an arc. It is also applicable to the adoption of various combination structures such as a combination of a straight line, an arc, and a straight line, and a combination of an arc, a straight line, and an arc.

[0024] Combined with Figure 4As shown in the figure, in this embodiment, snap rings 9 for connecting the piston rod 5 are provided on both the upper and lower sides of the piston 4. The piston rod 5 is provided with a clamping groove 51 adapted to the snap ring 9. A retaining ring 10 for limiting is provided on the front end cover 2 and the rear end cover 3 in the direction towards the piston 4. The thickness h of the snap ring 9 is less than the height H of the retaining ring 10. The longitudinal length Z of the guide groove 61 is greater than the distance Z between adjacent retaining rings 10. When the piston 4 moves up and down, the retaining ring 10 prevents the snap ring 9 from touching the front end cover 2 / the rear end cover 3, avoiding the snap ring 9 being impacted and disengaging from the clamping groove 51. At the same time, the retaining ring 10 controls the stroke of the piston 4, thus preventing the pin shaft 7 from touching the two ends of the guide groove 61 and avoiding the pin shaft 7 being damaged due to impact and damaging the guide groove 61, so as to maintain the stability of the structure.

[0025] In this embodiment, the guide sleeve 6 is provided with an installation part 64, and the installation part 64 is provided with installation holes 65 distributed in a circular pattern. The guide sleeve 6 is threadedly connected to the rear end cover 3 through the installation holes 65. The front end cover 2 and the rear end cover 3 are provided with screws 11 distributed in a circular pattern. The front end cover 2 is threadedly connected to the cylinder barrel 1 and the rear end cover 3 through the screws 11. And a sealing ring 12 is provided between the cylinder barrel 1 and the front end cover 2 / the rear end cover 3. The rear end cover 3 is provided with threaded holes and through holes distributed in two inner and outer circles. The guide sleeve 6 is threadedly connected to the rear end cover 3 through screws passing through the installation holes 65. The front end cover 2 is provided with threaded holes adapted to the through holes. One end of the screw 11 is threadedly connected to the front end cover 2, and the other end is connected to the rear end cover 3 through a nut, so that the front end cover 2 and the rear end cover 3 are clamped at both ends of the cylinder barrel 1, and the overall structure is simple and the installation is convenient.

[0026] In this embodiment, the front end cover 2 / the rear end cover 3 is provided with a central hole 21 adapted to the piston rod 5, and a sealing ring 12 and a guide strip 13 abutted against the piston rod 5 are provided in the central hole 21. Sealing rings 12 and guide strips 13 abutted against the cylinder barrel 1 are provided on the outer side of the piston 4. The guide strip 13 is an alloy wear-resistant ring. The airtightness of the cylinder part is maintained through the sealing ring 12 to prevent air leakage in the cylinder part and improve the transmission efficiency. The wear resistance of the piston 4 and the piston rod 5 is increased through the guide strip 13 to improve the service life of the product.

[0027] The working principle of the present utility model is that the air inlet ends 100 of the front end cover 2 and the rear end cover 3 are externally connected to a gas source to form an air flow circuit. The piston 4 is driven to move up and down by air pressure to drive the piston rod 5. During the movement of the piston rod 5, the piston rod 5 is forced to move along the guide groove 61 through the pin shaft 7. When the pin shaft 7 enters the straight groove 62, the piston rod 5 moves linearly. When the pin shaft 7 enters the arc groove 63, the piston rod 5 rotates relative to the front end cover 2, the rear end cover 3 and the piston 4, so as to realize the linear and rotational combined feeding action of the piston rod 5 during the transmission process.

[0028] In addition to the above embodiments, the present utility model may also have other embodiments. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope claimed by the present utility model.

Claims

1. A lifting rotary pneumatic actuator, characterized in that, It includes a cylinder barrel (1), a front end cover (2), a rear end cover (3), a piston (4), a piston rod (5) and a guide sleeve (6). The two ends of the cylinder barrel (1) are respectively provided with a front end cover (2) and a rear end cover (3). A piston (4) is slidably connected in the cylinder barrel (1), and the front end cover (2) and the rear end cover (3) are provided with an air inlet end (100) for controlling the movement of the piston (4). The piston (4) is connected with a piston rod (5) passing through the front end cover (2) and the rear end cover (3). The rear end cover (3) is fixedly connected with a guide sleeve (6), and the guide sleeve (6) is provided with a guide groove (61) for controlling the linear feed and / or rotational feed of the piston rod (5).

2. The lifting rotary pneumatic actuator according to claim 1, characterized in that: Two groups of guide grooves (61) are rotationally distributed on the guide sleeve (6). One end of the piston rod (5) is provided with a pin shaft (7) adapted to the guide groove (61). The piston rod (5) linearly moves up and down / rotates up and down along the guide groove (61) through the pin shaft (7). A set screw (8) for fixing the pin shaft (7) is provided at the top of the piston rod (5).

3. The pneumatic actuator for lifting and rotating according to claim 2, characterized in that: The guide groove (61) includes a straight groove (62) and an arc groove (63) which are smoothly connected to each other.

4. The lift-rotation pneumatic actuator according to claim 2, characterized in that: Snap rings (9) for connecting the piston rod (5) are provided on the upper and lower sides of the piston (4). The piston rod (5) is provided with a clamping groove (51) adapted to the snap ring (9). The front end cover (2) and the rear end cover (3) are provided with retaining rings (10) for limiting in the direction towards the piston (4). The thickness h of the snap ring (9) is less than the height H of the retaining ring (10). The longitudinal length Z of the guide groove (61) is greater than the spacing Z between adjacent retaining rings (10).

5. The pneumatic actuator for lifting and rotating according to claim 1, wherein: The guide sleeve (6) is provided with an installation part (64), and the installation part (64) is provided with installation holes (65) distributed in a circular pattern. The guide sleeve (6) is threadedly connected to the rear end cover (3) through the installation holes (65). The front end cover (2) and the rear end cover (3) are provided with screws (11) distributed in a circular pattern. The front end cover (2) is threadedly connected to the cylinder barrel (1) and the rear end cover (3) through the screws (11), and a sealing ring (12) is provided between the cylinder barrel (1) and the front end cover (2) / rear end cover (3).

6. The lift-rotation pneumatic actuator according to claim 1, wherein: The front end cover (2) / rear end cover (3) is provided with a central hole (21) adapted to the piston rod (5), and a sealing ring (12) and a guide strip (13) abutted against the piston rod (5) are provided in the central hole (21). Sealing rings (12) and guide strips (13) abutted against the cylinder barrel (1) are provided on the outer side of the piston (4).

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