Pneumatic actuator with elastic return

Abstract

The application discloses a pneumatic actuating mechanism with elastic reset structure and relates to the technical field of pneumatic equipment. The pneumatic actuating mechanism comprises a main body, a driving cavity and a transmission cavity are arranged in the main body, a moving piston is arranged in the driving cavity, a connecting block, a first transmission member and a second transmission member which are connected with the connecting block are arranged in the transmission cavity, the first transmission member is arranged through the connecting block, an elastic member is arranged between the first transmission member and the connecting block, the second transmission member is connected with an assembling rod, an air inlet joint, an air outlet joint and a negative pressure channel which is communicated with an executing component are arranged on the main body. The moving piston drives the first transmission member to drive the second transmission member and the assembling rod to move through the connecting block, and the elastic member drives the first transmission member to drive each transmission component to be reset synchronously after air exhaust. The actuating mechanism can realize automatic reset, simplify air path control, improve reset reliability, and has the advantages of compact structure, high integration degree, convenient maintenance and the like.

Description

Technical Field

[0001] This invention relates to the field of pneumatic equipment technology, and in particular to a pneumatic actuator with an elastic reset structure. Background Technology

[0002] Pneumatic actuators are widely used in automated equipment, electronic assembly equipment, medical equipment, and material handling equipment. They are typically used to drive nozzles or other actuators to perform actions such as extension, suction, handling, and retraction. Most existing pneumatic actuators employ a structure where a moving piston directly drives the output rod, and the reciprocating motion of the actuator is achieved through bidirectional air supply.

[0003] However, existing pneumatic actuators typically rely on bidirectional air pressure to complete extension and retraction, resulting in complex air circuit structures and control methods. Fluctuations in supply air pressure or insufficient control precision can easily affect the actuator's retraction stability. Furthermore, the transmission structure of existing actuators is relatively simple. When integrating negative pressure adsorption functions, an additional negative pressure connection structure is usually required, making the overall structure complex and hindering miniaturization and integration design. In addition, most internal transmission components of existing actuators are enclosed, making maintenance and replacement inconvenient. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a pneumatic actuator with an elastic reset structure to solve the problems existing in the background art.

[0005] The present invention provides the following technical solution: a pneumatic actuator with an elastic reset structure, comprising a main body, wherein the main body is provided with a drive cavity and a transmission cavity communicating with the drive cavity, a moving piston is slidably provided in the drive cavity, and a connecting block and a first transmission component and a second transmission component connected to the connecting block are provided in the transmission cavity; The first transmission member passes through the connecting block and is movable relative to the connecting block along the axial direction. One end of the first transmission member is connected to the moving piston. An elastic element is provided between the first transmission component and the connecting block. One end of the second transmission component is connected to the connecting block, and the other end is connected to an assembly rod for mounting the actuating component. The main body is provided with an air inlet connector and an exhaust connector that are respectively connected to both sides of the drive cavity; When the air inlet connector supplies air to the drive chamber, the moving piston drives the first transmission component to move, and drives the second transmission component and the assembly rod to extend through the connecting block; when the air inlet connector exhausts air, the air pressure in the drive chamber decreases, the elastic component releases elastic potential energy, pushes the first transmission component to move in the opposite direction, and drives the moving piston, the connecting block, the second transmission component and the assembly rod to reset synchronously.

[0006] Preferably, the elastic element is a compression spring, which is sleeved on the outer periphery of the first transmission element.

[0007] Preferably, the first transmission member is provided with a first limiting part and a second limiting part for limiting the axial movement range of the connecting block, and the connecting block is located between the first limiting part and the second limiting part.

[0008] Preferably, the elastic element is disposed between the first limiting part and the connecting block, and is capable of elastic deformation when the first transmission member moves along the driving direction, and releasing elastic potential when the first transmission member resets.

[0009] Preferably, the main body is provided with a guide support portion, and the second transmission member passes through the guide support portion and can slide along the axial direction.

[0010] Preferably, the guide support includes a sleeve fixedly mounted on the main body, and the second transmission component is slidably mounted inside the sleeve.

[0011] Preferably, the main body is further provided with a suction nozzle connector, which is connected to the actuating component connected to the assembly rod through a negative pressure channel disposed inside the main body, so as to provide negative pressure to the actuating component.

[0012] Preferably, the negative pressure channel extends along the axial direction of the main body and passes through the assembly rod to communicate with the actuating component. Preferably, the transmission cavity of the main body is provided with a detachable cover plate at the corresponding position. After removing the cover plate, the first transmission component, the connecting block, the second transmission component and the elastic component can be exposed for installation, maintenance or replacement.

[0013] Preferably, the intake connector is connected to one side of the drive chamber through a first air passage, the exhaust connector is connected to the other side of the drive chamber through a second air passage, and the moving piston is located between the first air passage and the second air passage.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention provides a first transmission component and a connecting block between a moving piston and a second transmission component, and an elastic component between the first transmission component and the connecting block. This allows the moving piston to drive the first transmission component, which in turn drives the connecting block and the second transmission component to extend the actuator. When the air pressure in the drive chamber decreases, the elastic component releases its stored elastic potential energy, pushing the first transmission component to move in the opposite direction and causing the moving piston, connecting block, second transmission component, and assembly rod to reset synchronously. This eliminates the need for reverse air supply to achieve automatic return of the actuator, simplifying the air circuit structure and improving the reliability and operational stability of the actuator's reset. 2. The present invention achieves stable transmission of driving force by adopting a transmission structure consisting of a first transmission component, a connecting block and a second transmission component, and integrates the driving mechanism, the reset mechanism and the negative pressure channel inside the main body, so that the actuator can achieve negative pressure adsorption while completing reciprocating motion, effectively reducing external connecting components and installation space, improving the overall integration and structural compactness of the actuator, and facilitating the miniaturization design of automated equipment. 3. By setting a detachable cover plate at the position corresponding to the transmission cavity of the main body, the present invention enables key components such as the first transmission component, connecting block, second transmission component and elastic component to be directly disassembled, repaired and replaced without disassembling the entire main body, thereby improving maintenance efficiency, shortening equipment downtime, reducing maintenance costs and further improving the long-term reliability of the actuator. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the cylinder of the present invention.

[0016] Figure 2 This is a schematic diagram of the internal structure of the cylinder of the present invention.

[0017] The attached figures are labeled as follows: 100. Main body; 101. Movable chamber; 102. Piston chamber; 103. Moving piston; 104. Connecting block; 105. First connecting rod; 1051. First limiting part; 1052. Second limiting part; 1053. Elastic element; 106. Second connecting rod; 107. Sleeve shaft; 108. Air inlet connector; 109. Air outlet connector; 110. Suction nozzle connector; 111. First air passage; 112. Second air passage; 200. Assembly rod; 300. Cover plate. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0019] This invention provides a pneumatic actuator with an elastic reset structure, such as... Figure 1-2As shown, the device includes a main body 100, which is preferably formed from aluminum alloy, stainless steel, or other materials with high mechanical strength and good machinability. The main body 100 contains an interconnected drive cavity 101 and a transmission cavity 102. The drive cavity 101 is used to install the moving piston 103 and form a pneumatic drive space, while the transmission cavity 102 is used to install transmission components such as the first transmission component 105, the connecting block 104, the second transmission component 106, and the elastic element 1053. This arrangement of the drive mechanism and the transmission mechanism in different areas not only facilitates the sealing of the drive cavity 101 but also makes the installation, maintenance, and replacement of the internal transmission mechanism easier.

[0020] Furthermore, one end of the second transmission component 106 is fixedly connected to the connecting block 104, and the other end is connected to the assembly rod 200, which is used to install the actuating component. In this embodiment, the actuating component is a suction nozzle.

[0021] To ensure the guiding accuracy of the second transmission component 106 during its movement, a guide support is provided on the main body 100. The second transmission component 106 passes through the guide support and can slide axially. In this embodiment, the guide support includes a sleeve shaft 107 fixedly installed on the main body 100, and the second transmission component 106 is slidably disposed within the sleeve shaft 107.

[0022] The sleeve 107 not only provides radial support for the second transmission component 106, but also restricts the second transmission component 106 from radial swaying or tilting, so that the assembly rod 200 always moves linearly in a predetermined direction, thereby improving the positioning accuracy of the actuator, reducing friction and wear during the movement, and extending the service life of the actuator.

[0023] Furthermore, the drive chamber 101 is connected to the transmission chamber 102, and the first transmission component 105 is connected to the moving piston 103, thereby transmitting the generated driving force to the transmission chamber 102.

[0024] In this embodiment, a moving piston 103 is slidably disposed within the driving cavity 101, and a sealing ring is provided on the outer periphery of the moving piston 103, so that the moving piston 103 can form a reliable seal with the inner wall of the driving cavity 101, thereby ensuring a stable air pressure difference on both sides of the driving cavity 101. The moving piston 103 is fixedly connected to the first transmission member 105. When the moving piston 103 moves axially along the driving cavity 101, the first transmission member 105 moves synchronously to output the driving force to the transmission mechanism.

[0025] The main body 100 is equipped with an air inlet connector and an air outlet connector. The air inlet connector is connected to one side of the drive chamber 101 through a first air passage 111, and the air outlet connector is connected to the other side of the drive chamber 101 through a second air passage 112. The moving piston 103 is located between the first air passage 111 and the second air passage 112. During operation, an external solenoid valve controls compressed air to enter the drive chamber 101 through the air inlet connector, and air on the other side is discharged through the air outlet connector, creating a pressure difference on both sides of the moving piston 103, which drives the moving piston 103 to move axially along the drive chamber 101.

[0026] Furthermore, a connecting block 104 is provided inside the transmission cavity 102. The connecting block 104 serves as a power transmission node, cooperating with the first transmission component 105 on one hand and being fixedly connected to the second transmission component 106 on the other, so that the driving force output by the moving piston 103 can be sequentially transmitted to the second transmission component 106 and the assembly rod 200.

[0027] In this embodiment, the first transmission member 105 is disposed through the connecting block 104 and is capable of moving axially relative to the connecting block 104. A first limiting portion 1051 and a second limiting portion 1052 are formed on both sides of the first transmission member 105, and the connecting block 104 is located between the first limiting portion 1051 and the second limiting portion 1052, thereby restricting the connecting block 104 from detaching axially from the first transmission member 105, while allowing the first transmission member 105 to generate axial displacement relative to the connecting block 104 within a limited range.

[0028] Furthermore, an elastic element 1053 is provided between the first limiting part 1051 and the connecting block 104. In this embodiment, the elastic element 1053 is preferably a compression spring, which is sleeved on the outer periphery of the first transmission member 105.

[0029] When the moving piston 103 pushes the first transmission member 105 to move along the driving direction under the action of compressed air, the first transmission member 105 pushes the connecting block 104 to move synchronously, and drives the second transmission member 106 and the assembly rod 200 to extend outward. During this process, the first transmission member 105 gradually compresses the elastic member 1053, so that the elastic member 1053 stores elastic potential energy.

[0030] When the external control system cuts off the air supply or controls the air intake connector to exhaust, the air pressure in the drive chamber 101 gradually decreases, and the moving piston 103 loses its continuous driving force. At this time, the elastic element 1053 releases its stored elastic potential energy and pushes the first transmission element 105 to move in the opposite direction. Since the first transmission element 105 is fixedly connected to the moving piston 103, the first transmission element 105, under the action of the elastic element 1053, synchronously drives the moving piston 103 back to its initial position. At the same time, it drives the second transmission element 106 and the mounting rod 200 to retract synchronously through the connecting block 104, thereby completing the automatic reset of the entire actuator.

[0031] By adopting the above structure, the actuator return can be completed without continuously inputting reverse compressed air to the other side of the drive chamber 101. On the one hand, it simplifies the air circuit structure and control method, and on the other hand, it makes full use of the elastic element 1053 to provide a stable mechanical reset force, so that the actuator has good automatic reset capability and improves the reliability of the actuator's continuous cyclic operation.

[0032] Furthermore, the main body 100 is provided with a suction nozzle connector 110, which is connected to the suction nozzle connected to the assembly rod 200 through a negative pressure channel formed inside the main body 100, and is used to provide negative pressure to the suction nozzle.

[0033] Since the negative pressure channel is located inside the main body 100, the external negative pressure source can directly provide stable negative pressure to the suction nozzle through the suction nozzle connector 110, so that the suction nozzle can complete the adsorption of the workpiece after the assembly rod 200 extends; when the assembly rod 200 retracts, the suction nozzle synchronously drives the workpiece back, thereby realizing the integrated function of the actuator drive function and the negative pressure adsorption function. This not only reduces the external connection pipelines, but also improves the overall structural compactness, which is conducive to the miniaturization design of the equipment.

[0034] Furthermore, a removable cover plate 300 is provided on the main body 100 at the position corresponding to the transmission cavity 102. The cover plate 300 can be fixed to the main body 100 by screws, clips, or other detachable connection methods. When maintenance of the actuator is required, only the cover plate 300 needs to be removed to expose key transmission components such as the first transmission component 105, the connecting block 104, the second transmission component 106, and the elastic component 1053. The inspection, replacement, and repair of parts can be completed without disassembling the entire main body 100, effectively shortening equipment downtime and improving maintenance efficiency.

[0035] The working process of this embodiment is as follows: In the initial state of the actuator, the moving piston 103 is located in the initial position of the drive chamber 101, the first transmission component 105, the connecting block 104, the second transmission component 106 and the assembly rod 200 are all in the retracted state, the elastic component 1053 is in the natural state, and the suction nozzle connector 110 is connected to an external negative pressure source, so that the suction nozzle is in the state of waiting to absorb.

[0036] When the control system controls the air inlet connector to supply air to the drive chamber 101, compressed air enters the drive chamber 101 through the first air passage 111, and air from the other side is discharged through the second air passage 112. A pressure difference is formed on both sides of the drive chamber 101, which pushes the moving piston 103 forward. The moving piston 103 drives the first transmission component 105 to move synchronously. The first transmission component 105 pushes the connecting block 104 and the second transmission component 106 forward, while gradually compressing the elastic component 1053, causing the assembly rod 200 to drive the suction nozzle to extend to the target position to complete the adsorption.

[0037] After adsorption is completed, the control system controls the air inlet connector to exhaust air, the air pressure in the drive chamber 101 decreases, the elastic element 1053 releases the stored elastic potential energy, pushes the first transmission element 105 to move in the opposite direction, and sequentially drives the moving piston 103, connecting block 104, second transmission element 106 and assembly rod 200 to retract synchronously, so that the suction nozzle carries the workpiece back to the initial position, completing one complete execution cycle.

[0038] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0039] The above description is only a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. Any equivalent modifications or changes made by those skilled in the art based on the content disclosed in the present invention should be included within the scope of protection set forth in the claims.

Claims

1. A pneumatic actuator with an elastic reset structure, comprising a main body, wherein the main body has a drive cavity and a transmission cavity communicating with the drive cavity, a moving piston is slidably disposed in the drive cavity, and a connecting block and a first transmission component and a second transmission component connected to the connecting block are disposed in the transmission cavity; The first transmission member passes through the connecting block and is movable relative to the connecting block along the axial direction. One end of the first transmission member is connected to the moving piston. An elastic element is provided between the first transmission component and the connecting block. One end of the second transmission component is connected to the connecting block, and the other end is connected to an assembly rod for mounting the actuating component. The main body is provided with an air inlet connector and an exhaust connector that are respectively connected to both sides of the drive cavity; in, When the air inlet connector supplies air to the drive chamber, the moving piston drives the first transmission component to move, and drives the second transmission component and the assembly rod to extend through the connecting block; when the air inlet connector exhausts air, the air pressure in the drive chamber decreases, the elastic component releases elastic potential energy, pushes the first transmission component to move in the opposite direction, and drives the moving piston, the connecting block, the second transmission component and the assembly rod to reset synchronously.

2. The pneumatic actuator with an elastic reset structure according to claim 1, characterized in that: The elastic element is a compression spring, which is sleeved on the outer periphery of the first transmission element.

3. The pneumatic actuator with an elastic reset structure according to claim 1, characterized in that: The first transmission component is provided with a first limiting part and a second limiting part for limiting the axial movement range of the connecting block, and the connecting block is located between the first limiting part and the second limiting part.

4. A pneumatic actuator with an elastic reset structure according to claim 3, characterized in that: The elastic element is disposed between the first limiting part and the connecting block, and can undergo elastic deformation when the first transmission member moves along the driving direction, and release elastic potential when the first transmission member resets.

5. A pneumatic actuator with an elastic reset structure according to claim 1, characterized in that: The main body is provided with a guide support part, and the second transmission member passes through the guide support part and can slide along the axial direction.

6. A pneumatic actuator with an elastic reset structure according to claim 5, characterized in that: The guide support includes a sleeve shaft fixedly mounted on the main body, and the second transmission component is slidably mounted inside the sleeve shaft.

7. A pneumatic actuator with an elastic reset structure according to claim 1, characterized in that: The main body is also provided with a suction nozzle connector, which is connected to the actuating component connected to the assembly rod through a negative pressure channel provided inside the main body, so as to provide negative pressure to the actuating component.

8. A pneumatic actuator with an elastic reset structure according to claim 8, characterized in that: The negative pressure channel extends along the main body axis and passes through the assembly rod to communicate with the actuating component.

9. A pneumatic actuator with an elastic reset structure according to claim 1, characterized in that: The main body has a detachable cover plate at the corresponding position of the transmission cavity. After removing the cover plate, the first transmission component, the connecting block, the second transmission component and the elastic component can be exposed for installation, maintenance or replacement.

10. A pneumatic actuator with an elastic reset structure according to claim 1, characterized in that: The intake connector is connected to one side of the drive chamber through the first air passage, and the exhaust connector is connected to the other side of the drive chamber through the second air passage. The moving piston is located between the first air passage and the second air passage.

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