Double-piston pneumatic straight stroke actuating mechanism

Abstract

The utility model provides a double-piston pneumatic straight stroke actuating mechanism, which comprises electric air pumps, a middle mounting seat and a movable groove, the rear part of the middle mounting seat is provided with two groups of rear air cavities, the rear ends of the rear air cavities are provided with the electric air pumps, rear axle rods are telescopically and movably arranged in the rear air cavities, and the front ends of the rear axle rods are fixedly provided with actuating front axle rods; an outer shaft sleeve is arranged on the front portion of the middle mounting base, the front end of the outer shaft sleeve is fixed to the rear side face of a movable groove, an air bag is arranged in the movable groove, a movable plate is arranged on the inner side face of the air bag, a front sleeve plate is arranged on the front side face of the movable groove, and the front portion of the execution front shaft rod penetrates through the front sleeve plate. Two groups of inflating nozzles are arranged at the front part of the electric air pump, and each group of inflating nozzles is communicated with one group of rear air cavities. Double-piston pneumatic execution is adopted, execution operation is safer and more stable, the execution direction is accurate, elastic buffering can be carried out to avoid excessive impact, and use is more stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of double pistons, in particular to a double piston pneumatic linear actuator. Background Art

[0002] Pneumatic actuators are commonly known as pneumatic heads and also called pneumatic actuators. According to their energy forms, actuators are divided into three categories: pneumatic, electric and hydraulic. They each have their own characteristics and are suitable for different occasions.

[0003] In the specification of the double-piston pneumatic actuator of the prior art (Announcement No. CN2307910Y), it is mentioned that "the gear shaft extends out of the cylinder body, the end covers are fixed to both sides of the cylinder body and the cylinder body is sealed, and its characteristic is that the piston extends toward the gear shaft to form a rack that meshes with the gear shaft, and the first air path leads from the cylinder body to the cavity between a pair of pistons, and the second air path leads from the cylinder body to the cavity between the piston and the end cover." However, the operating direction of the pneumatic actuator in the prior art is not accurate and stable during telescopic movement. The telescopic impact may be too strong and damage the internal structure, or affect the accuracy of the execution direction. It is not safe, stable and practical. Utility Model Content

[0004] In order to overcome the defects of the existing technology, a double-piston pneumatic linear actuator is now provided to solve the problem that the operating direction of the pneumatic actuator in the existing technology is not accurate and stable during the extension and contraction activities, the extension and contraction impact may be too strong and damage the internal structure, or affect the accuracy of the execution direction, and is not safe, stable and practical.

[0005] To achieve the above-mentioned purpose, a double-piston pneumatic linear actuator is provided, including an electric air pump, a middle mounting seat and a movable groove, the rear part of the middle mounting seat is provided with two groups of rear air cavities, and the rear end of the rear air cavity is provided with an electric air pump, a rear axle rod is telescopically movable in the rear air cavity, and the front end of the rear axle rod is fixed with an execution front axle rod, the front part of the middle mounting seat is provided with an outer sleeve, and the front end of the outer sleeve is fixed to the rear side surface of the movable groove, an airbag is provided in the movable groove, and a movable plate is provided on the inner side surface of the airbag, and a front sleeve plate is provided on the front side surface of the movable groove, and the front part of the execution front axle rod is arranged through the front sleeve plate.

[0006] Furthermore, two groups of inflation nozzles are provided at the front of the electric air pump, and each group of inflation nozzles is connected to a group of rear air cavities.

[0007] Furthermore, a set of return air pipes are connected to both sides of the front side of the electric air pump, and an electromagnetic control valve is installed at the front of the return air pipe, and an air outlet nozzle is provided at the front end of the return air pipe, and the front end of the air outlet nozzle is connected to the front part of the rear air cavity.

[0008] Furthermore, an outer sleeve is provided at the front of the rear air cavity, and a middle groove is provided at the front of the outer sleeve, and a front port of the middle groove leads to the movable groove.

[0009] Furthermore, positioning rods are provided on both the left and right parts of the movable groove, a spring is mounted on the outer sleeve of the positioning rod, and the front end of the spring is against the rear side of the airbag, and front holes are opened on both the left and right parts of the airbag, and the front part of the positioning rod is set through the front hole.

[0010] Furthermore, both the left and right parts of the movable plate are provided with front axle sleeves, and the front part of the spring extends into the front axle sleeves, and the centers of the rear air cavity, rear axle rod, front axle sleeve and the executing front axle rod on the same side are all located on the same axis.

[0011] The beneficial effects of the present invention are:

[0012] 1. The utility model uses an electric air pump to inflate the rear air cavity, and uses pneumatics to push the rear axle rod forward, thereby pushing the rear axle rod and the execution front axle rod to move forward and extend together, and completes the pneumatic straight-stroke execution work through the double execution front axles on the left and right sides, which is faster and more convenient.

[0013] 2. The rear air cavity and the middle groove of the utility model are connected, which makes it convenient to control the rear axle rod to move straight and retract under pneumatic propulsion, thereby driving the front axle sleeve to enter the middle groove when it retracts back, which is safer and more stable.

[0014] 3. When the double-acting front axle rod of the utility model performs pneumatic linear execution, the movable plate is sleeved outside the front part of the positioning rod, and the rear part of the positioning rod is sleeved with a spring, so that the movable plate will be elastically cushioned by the spring when moving back and forth, and the front side surface of the movable plate is just located on the rear side surface of the airbag, which has the effect of limiting the forward position, so that the linear execution is avoided from being too violent, and the operation is safer and more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the axle rod extending before execution of the embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the front axle rod retraction in accordance with an embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of an electric air pump according to an embodiment of the present utility model;

[0018] Figure 4 This is a schematic diagram of a movable plate according to an embodiment of the present invention.

[0019] In the figure: 1. Electric air pump; 10. Inflating nozzle; 11. Return air duct; 12. Solenoid control valve; 13. Exhaust nozzle; 2. Middle mounting seat; 20. Rear air cavity; 21. Rear axle rod; 22. Outer shaft sleeve; 23. Middle groove; 24. Executing front axle rod; 3. Movable groove; 30. Movable plate; 31. Spring; 32. Airbag; 33. Positioning rod; 34. Front axle sleeve; 35. Front sleeve plate; 36. Front sleeve hole. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Specific details such as specific system structures and technologies are proposed in order to more thoroughly understand the embodiments of the present invention. The described embodiments are part of the embodiments of the present disclosure, not all of them. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present disclosure.

[0021] The specific implementation of the present utility model will be described in detail below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the front axle rod extending in the embodiment of the present utility model. Figure 2 This is a schematic diagram of the front axle rod retraction in the embodiment of the present invention. Figure 3 Schematic diagram of the electric air pump of the embodiment of the utility model and Figure 4 This is a schematic diagram of a movable plate according to an embodiment of the present invention.

[0023] Reference Figures 1 to 4 As shown, the utility model provides a double-piston pneumatic linear actuator, including an electric air pump 1, a middle mounting seat 2 and a movable groove 3, the rear part of the middle mounting seat 2 is provided with two groups of rear air cavities 20, and the rear end of the rear air cavity 20 is provided with an electric air pump 1, a rear shaft rod 21 is telescopically movable in the rear air cavity 20, and the front end of the rear shaft rod 21 is fixed with an execution front shaft rod 24, the front part of the middle mounting seat 2 is provided with an outer shaft sleeve 22, and the front end of the outer shaft sleeve 22 is fixed to the rear side surface of the movable groove 3, an air bag 32 is provided in the movable groove 3, and a movable plate 30 is provided on the inner side surface of the air bag 32, and a front sleeve plate 35 is provided on the front side surface of the movable groove 3, and the front side surface of the movable groove 3 is provided with a front sleeve plate 35, and the front part of the execution front shaft rod 24 is arranged through the front sleeve plate 35.

[0024] In this embodiment, two groups of inflation nozzles 10 are provided at the front of the electric air pump 1, and each group of inflation nozzles 10 is connected to a group of rear air cavity 20; a group of return air ducts 11 are connected to both sides of the front side of the electric air pump 1, and an electromagnetic control valve 12 is installed at the front of the return air duct 11, and an air outlet nozzle 13 is provided at the front end of the return air duct 11, and the front end of the air outlet nozzle 13 is connected to the front part of the rear air cavity 20.

[0025] As a preferred embodiment, the utility model inflates the rear air chamber 20 through the electric air pump 1, and uses pneumatics to push the rear axle 21 forward, thereby pushing the rear axle 21 and the execution front axle 24 to move forward and extend together, and the pneumatic straight-stroke execution work is completed through the double execution front axles 24 on the left and right sides, which is faster and more convenient.

[0026] In this embodiment, an outer sleeve 22 is provided at the front of the rear air cavity 20 , and a middle groove 23 is provided at the front of the outer sleeve 22 , and a front end of the middle groove 23 leads to the movable slot 3 .

[0027] As a preferred embodiment, the rear air cavity 20 and the middle groove 23 of the utility model are connected, which facilitates the control of the rear axle rod 21 to perform straight telescopic movement under pneumatic propulsion, thereby driving the front axle sleeve 34 to enter the middle groove 23 when it retracts back, which is safer and more stable.

[0028] In this embodiment, positioning rods 33 are provided on both the left and right parts of the movable groove 3, and a spring 31 is mounted on the outer sleeve of the positioning rod 33, and the front end of the spring 31 is against the rear side of the airbag 32, and front sleeve holes 36 are opened on both the left and right parts of the airbag 32, and the front part of the positioning rod 33 is arranged through the front sleeve holes 36; front axle sleeves 34 are provided on both the left and right parts of the movable plate 30, and the front part of the spring 31 extends into the front axle sleeve 34, and the centers of the rear air cavity 20, rear axle rod 21, front axle sleeve 34 and execution front axle rod 24 on the same side are all located on the same axis.

[0029] As a preferred embodiment, when the double-executing front shaft 24 of the utility model performs pneumatic straight-stroke execution, the movable plate 30 is sleeved on the outside of the front of the positioning rod 33, and the rear of the positioning rod 33 is sleeved with a spring 31, so that the movable plate 30 will be elastically cushioned by the spring 31 when moving forward and backward, and the front side surface of the movable plate 30 is just located on the rear side surface of the airbag 32, which has the effect of limiting the position forward, so that the straight-stroke execution is avoided from being too violent, and the operation is safer and more stable.

[0030] The utility model can effectively solve the problems in the prior art that the running direction of the pneumatic actuator is not accurate and stable during the extension and retraction activities, the extension and retraction impact may be too strong and damage the internal structure, or affect the accuracy of the execution direction, and is not safe, stable and practical. The utility model adopts double-piston pneumatic execution, the execution operation is safer and more stable, and the execution direction is accurate. It can perform elastic buffering to avoid excessive impact, and is more stable and reliable to use.

[0031] The above embodiments are used to illustrate the present invention rather than to limit the present invention. Any modifications and changes made to the present invention within the spirit of the present invention and the scope of the claims for protection shall be included in the scope of protection of the present invention.

Claims

1. A double-piston pneumatic linear actuator, characterized by: The invention comprises an electric air pump (1), a middle mounting seat (2) and a movable groove (3); the rear portion of the middle mounting seat (2) is provided with two groups of rear air cavities (20), and the rear end of the rear air cavity (20) is provided with the electric air pump (1); a rear axle rod (21) is telescopically movable in the rear air cavity (20), and an execution front axle rod (24) is fixed to the front end of the rear axle rod (21); an outer shaft sleeve (22) is provided at the front portion of the middle mounting seat (2), and the front end of the outer shaft sleeve (22) is fixed to the rear side surface of the movable groove (3); an air bag (32) is provided in the movable groove (3), and a movable plate (30) is provided on the inner side surface of the air bag (32); a front cover plate (35) is provided on the front side surface of the movable groove (3), and the front portion of the execution front axle rod (24) is arranged through the front cover plate (35).

2. A double-piston pneumatic linear actuator according to claim 1, characterized in that: Two groups of inflation nozzles (10) are provided at the front of the electric air pump (1), and each group of inflation nozzles (10) is connected to a group of rear air cavities (20).

3. A double-piston pneumatic linear actuator according to claim 1, characterized in that: A set of air return pipes (11) are connected to both sides of the front side of the electric air pump (1), and an electromagnetic control valve (12) is installed at the front of the air return pipe (11), and an air outlet nozzle (13) is provided at the front end of the air return pipe (11), and the front end of the air outlet nozzle (13) is connected to the front part of the rear air cavity (20).

4. A double-piston pneumatic linear actuator according to claim 1, characterized in that: An outer sleeve (22) is provided at the front of the rear air cavity (20), and a middle groove (23) is provided at the front of the outer sleeve (22), and a front end of the middle groove (23) leads to the movable groove (3).

5. The double-piston pneumatic linear actuator according to claim 1, characterized in that: Positioning rods (33) are provided on both the left and right parts of the movable groove (3), a spring (31) is provided on the outer sleeve of the positioning rod (33), and the front end of the spring (31) abuts against the rear side of the air bag (32), and front sleeve holes (36) are provided on both the left and right parts of the air bag (32), and the front part of the positioning rod (33) passes through the front sleeve hole (36).

6. The double-piston pneumatic linear actuator according to claim 1, characterized in that: The left and right parts of the movable plate (30) are both provided with front axle sleeves (34), and the front part of the spring (31) extends into the front axle sleeve (34), and the centers of the rear air cavity (20), the rear axle rod (21), the front axle sleeve (34) and the execution front axle rod (24) on the same side are all located on the same axis.

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