A rotary shaft assembly for a pneumatic actuator

Abstract

This utility model relates to the field of actuator technology, specifically a rotary shaft assembly for a pneumatic actuator, including a rotary shaft, a lever, and an angle adjustment block. The bottom end of the rotary shaft is connected to a valve, and its outer wall is provided with a toothed path and a foolproof anti-misalignment ridge. The lever has a lever tooth groove adapted to the toothed path and a lever anti-misalignment groove adapted to the ridge, used to receive the power from the lever fork to drive the rotary shaft. The angle adjustment block has an angle adjustment block tooth groove adapted to the toothed path and an angle adjustment block anti-misalignment groove adapted to the ridge, and the rotation of the rotary shaft is limited by an adjusting screw. This assembly utilizes a foolproof structure to achieve precise assembly, the toothed path and tooth groove stably transmit power, the angle adjustment block ensures precise valve opening and closing, it is made of durable metal, and the lever has markings to assist installation. It solves the problems of difficult assembly and easy misalignment in existing systems, improves the actuator's valve control accuracy and stability, and is suitable for industrial automation pneumatic actuator scenarios.

Description

Technical Field

[0001] This utility model relates to the field of actuator technology, and in particular to a rotary shaft assembly for a pneumatic actuator. Background Technology

[0002] In industrial automation control systems, the pneumatic actuator with a fork, with its unique power transmission and action execution mechanism, has become a key device for precise valve drive control, which is of great significance for ensuring the stable and efficient operation of industrial processes. The actuator's rotating shaft assembly, as the core transmission unit, consists of a rotating shaft, a fork block, and an angle adjustment block. The bottom end of the rotating shaft is connected to the valve, and the fork block receives the power transmitted by the fork (linked with the piston), driving the rotating shaft to rotate and realize the valve opening and closing. The angle adjustment block is limited by the adjusting screw to ensure that the valve is accurately opened and closed.

[0003] However, in existing technologies, the rotating shaft, the lever, and the angle adjustment block are connected by pins. Pin connections are achieved by inserting cylindrical or conical pins into corresponding holes in the components. While simple in structure, this method offers poor positioning guidance. In actual production and maintenance, the lack of precise error-proofing makes it difficult for installers to quickly and accurately assemble the three components, frequently resulting in the rotating shaft being installed backwards or askew, and the lever and angle adjustment block being misaligned.

[0004] Taking a pneumatic actuator with a shift fork as an example, if the rotating shaft and accessories are installed incorrectly, the fit with the shift fork will be disrupted, and the piston power cannot be effectively transmitted. This makes it impossible to accurately control the opening and closing of the valve using the shift block and angle adjustment block, and directly affects the on / off accuracy and parameter stability of the industrial process. From the perspective of equipment operation, installation deviations lead to uneven stress on components, accelerating the wear of components such as the rotating shaft, shift fork, and shift block, which can easily cause abnormal vibration and noise, and in severe cases, cause components to jam, increasing maintenance costs and downtime.

[0005] In terms of production and maintenance efficiency, the lack of clear installation guidelines for pin connections necessitates repeated adjustments by personnel, resulting in low installation efficiency. During equipment maintenance and component replacement, repeated disassembly and reassembly due to installation errors further slows down the maintenance process. Moreover, control deviations and malfunctions caused by installation errors can compromise product performance stability, weaken market competitiveness, and damage the company's reputation. In summary, the existing pin connection method for rotary shaft components has significant shortcomings and urgently requires innovation and improvement to enhance the actuator's precise control over valves and ensure efficient and stable industrial production. Utility Model Content

[0006] The purpose of this utility model is to overcome the problems of the prior art and provide a rotary shaft assembly for pneumatic actuators. This solves the technical problems of existing pneumatic actuator rotary shaft assemblies that use pin connections, which are prone to reverse / skewed installation of the rotary shaft, misalignment of the shift block and the angle adjustment block, damage to the engagement with the shift fork, inability to accurately control the valve, and impact on process stability and production and maintenance efficiency.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A rotary shaft assembly for a pneumatic actuator includes a rotary shaft, a shift block, and an angle adjustment block. The outer wall of the rotary shaft is provided with a toothed path. The shift block has a shift block insertion hole, and the wall of the shift block insertion hole is provided with a shift block tooth groove adapted to the toothed path. The angle adjustment block has an angle adjustment block insertion hole, and the wall of the angle adjustment block insertion hole is provided with an angle adjustment block tooth groove adapted to the toothed path.

[0009] Furthermore, the toothed path is a structure that extends axially along the rotation axis, and the toothed groove of the toggle block and the toothed groove of the angular adjustment block respectively mesh with the toothed path to realize power transmission.

[0010] Furthermore, the rotating shaft is provided with anti-misbehavior protrusions on its toothed path, the inner wall of the toggle block tooth groove is provided with toggle block anti-misbehavior grooves adapted to the anti-misbehavior protrusions, and the inner wall of the angle adjustment block tooth groove is provided with angle adjustment block anti-misbehavior grooves adapted to the anti-misbehavior protrusions.

[0011] Furthermore, the anti-misalignment protrusion cooperates with the anti-misalignment groove of the toggle block and the anti-misalignment groove of the corner adjustment block to limit the installation position between the rotating shaft, the toggle block and the corner adjustment block, and prevent misalignment during installation.

[0012] Furthermore, there are two anti-foolproof protrusions, symmetrically arranged on the outer wall of the rotating shaft. Correspondingly, there are two anti-foolproof grooves for the toggle block and two anti-foolproof grooves for the angle adjustment block, so as to accommodate the two anti-foolproof protrusions.

[0013] Furthermore, the lever is used to receive the force of the lever fork and drive the rotating shaft to rotate when the piston drives the lever fork to move, so as to realize the opening and closing action of the valve.

[0014] Furthermore, the angle adjustment block adjusts the rotation limit of the rotating shaft through the adjustment screw to ensure that the valve is fully open or fully closed.

[0015] Furthermore, the rotating shaft, the toggle block, and the angle adjustment block are all made of metal, possessing good strength and wear resistance.

[0016] Furthermore, the metal material is stainless steel, which has corrosion resistance and is suitable for complex industrial environments.

[0017] Furthermore, the dial is provided with a marking structure for indicating the installation direction or position, to assist installers in accurate assembly.

[0018] The rotary shaft assembly for a pneumatic actuator provided by this utility model features a stable meshing of the toothed path and toothed groove, ensuring reliable transmission of power from the lever block to the rotary shaft when receiving power from the lever fork. This guarantees stable valve opening and closing actions and enhances the actuator's operational stability. Precise matching of the anti-foolproof protrusion and anti-foolproof groove prevents the rotary shaft, lever block, and angle adjustment block from being installed backwards, askew, or misaligned, significantly improving assembly efficiency and accuracy, and laying a solid foundation for precise valve control. The angle adjustment block is precisely installed using the toothed groove and anti-foolproof structure, effectively limiting the rotary shaft with the adjusting screw to ensure complete valve opening and closing, improving the on / off accuracy and parameter stability of industrial processes. The assembly is made of metal (preferably stainless steel), offering high strength, wear resistance, and corrosion resistance, making it suitable for complex industrial environments, extending service life, and reducing maintenance costs. Simultaneously, the marking structure on the lever block assists installers in quickly identifying the assembly direction and position, further optimizing assembly convenience and accuracy, and comprehensively contributing to the efficient and stable operation of the pneumatic actuator. Attached Figure Description

[0019] Figure 1 This is a first-view structural schematic diagram of a rotary shaft assembly for a pneumatic actuator according to the present invention;

[0020] Figure 2 This is a second-view structural schematic diagram of a rotary shaft assembly for a pneumatic actuator according to the present invention;

[0021] Figure 3 This is an exploded view of a rotary shaft assembly for a pneumatic actuator according to the present invention;

[0022] Figure 4 This is a cross-sectional view of a rotary shaft assembly for a pneumatic actuator according to the present invention applied to the actuator.

[0023] Illustration markings:

[0024] 1-Rotating shaft, 101-Gear path, 102-Footproof ridge;

[0025] 2-Pulling block, 201-Pulling block insertion hole, 202-Pulling block tooth groove, 203-Pulling block anti-fooling groove;

[0026] 3-Angle adjustment block, 301-Angle adjustment block socket, 302-Angle adjustment block tooth groove, 303-Angle adjustment block anti-fooling groove;

[0027] 4-Piston;

[0028] 5-Shift fork;

[0029] 6-Adjusting screw;

[0030] 7-Cylinder block. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to the figures and embodiments.

[0032] like Figures 1-3 As shown, a rotary shaft assembly for a pneumatic actuator includes a rotary shaft 1, a lever 2, and an angle adjustment block 3. The bottom end of the rotary shaft 1 is used to connect to a valve. The lever 2 acts on a lever fork 5 connected to a piston 4. The angle adjustment block 3 limits the clockwise or counterclockwise rotation of the rotary shaft 1. The outer wall of the rotary shaft 1 is provided with a toothed path 101. The lever 2 is provided with a lever insertion hole 201, and the hole wall of the lever insertion hole 201 is provided with a lever tooth groove 202 adapted to the toothed path 101. The angle adjustment block 3 is provided with an angle adjustment block insertion hole 301, and the hole wall of the angle adjustment block insertion hole 301 is provided with an angle adjustment block tooth groove 302 adapted to the toothed path 101.

[0033] like Figure 4 As shown, the rotating shaft has a bottom end for connecting to a valve, and its outer wall is provided with toothed grooves, with anti-foolproof protrusions on the toothed grooves. The toothed grooves 101 are structures that extend axially along the rotating shaft 1. The lever tooth grooves 202 and the angle adjustment block tooth grooves 302 respectively mesh with the toothed grooves 101 to realize power transmission and provide a basis for power transmission.

[0034] A lever block (or paddle block) acts on a lever fork connected to the piston. It has a lever block insertion hole with toothed grooves on the hole wall that mesh with the tooth path of the rotating shaft, transmitting power through the meshing of the grooves. Specifically, the lever block 2 is used to receive the force of the lever fork 5 when the piston 4 drives the lever fork 5 to move, thereby rotating the rotating shaft 1 to achieve the opening and closing action of the valve.

[0035] Angle adjustment block: Used to limit the clockwise / counterclockwise rotation of the rotating shaft. It has an insertion hole for the angle adjustment block, and the hole wall has toothed grooves that match the tooth path of the rotating shaft. Force is transmitted through the toothed grooves, and the limit adjustment is achieved through an adjusting screw, ensuring the valve is fully open or closed. That is, the angle adjustment block 3, through the adjusting screw 6, adjusts the rotation limit of the rotating shaft 1, ensuring the valve is fully open or fully closed.

[0036] The paddle insertion hole 201 and the angle adjustment block insertion hole 301 are used to fit the rotating shaft 1. By making the tooth path 101 of the rotating shaft 1 mesh with the tooth groove 202 of the paddle and the tooth groove 302 of the angle adjustment block, the paddle 2 and the angle adjustment block 3 are fitted onto the rotating shaft 1 to complete the assembly.

[0037] In this embodiment, the rotating shaft 1, the toggle block 2, and the angle adjustment block 3 are all made of metal, possessing good strength and wear resistance. The metal material is stainless steel, which has corrosion resistance and is suitable for complex industrial environments.

[0038] As an optimization of this embodiment, the push block 2 is provided with a marking structure for identifying the installation direction or position to assist installers in accurate assembly.

[0039] like Figure 2 As shown, as a further optimization of this embodiment, the tooth path 101 of the rotating shaft 1 in this embodiment is provided with a foolproof protrusion 102, the inner wall of the lever tooth groove 202 is provided with a lever foolproof groove 203 adapted to the foolproof protrusion 102, and the inner wall of the angle adjustment block tooth groove 302 is provided with an angle adjustment block foolproof groove 303 adapted to the foolproof protrusion 102.

[0040] The rotating shaft has a bottom end for connecting to a valve, and its outer wall is equipped with toothed grooves and anti-misalignment ridges. The toothed grooves extend axially, providing a foundation for power transmission; the anti-misalignment ridges are used to define the installation position and prevent misalignment.

[0041] Shift block: Used to act on the shift fork connected to the piston. It has a shift block insertion hole, with shift block tooth grooves on the hole wall that match the tooth path of the rotating shaft, and a shift block anti-misalignment groove on the inner wall that matches the anti-misalignment protrusion of the rotating shaft. Power is transmitted through the meshing of the tooth grooves, and the anti-misalignment groove and protrusion ensure accurate installation position.

[0042] Angle adjustment block: Used to limit the clockwise / counterclockwise rotation of the rotating shaft. It features an angle adjustment block insertion hole with toothed grooves on the hole wall that match the toothed path of the rotating shaft. The inner wall has an anti-misalignment groove that matches the anti-misalignment protrusion of the rotating shaft. The toothed grooves transmit force, and the anti-misalignment groove and protrusion work together to ensure precise installation. Limit adjustment is achieved via an adjusting screw, ensuring the valve is fully open and closed.

[0043] The anti-misalignment protrusion 102 cooperates with the anti-misalignment groove 203 of the toggle block and the anti-misalignment groove 303 of the corner adjustment block to limit the installation position between the rotating shaft 1, the toggle block 2 and the corner adjustment block 3, and prevent misalignment during installation.

[0044] Specifically, in this embodiment, the anti-foolproof protrusion 102, the anti-foolproof groove 203 of the toggle block, and the anti-foolproof groove 303 of the corner adjustment block limit the installation position of the rotating shaft 1, the toggle block 2, and the corner adjustment block 3, so as to avoid reverse installation, misalignment, and misalignment, improve assembly efficiency and accuracy, and ensure precise control of the valve in the future.

[0045] As a specific embodiment of this solution, there are two anti-foolproof protrusions 102, which are symmetrically arranged on the outer wall of the rotating shaft 1. Correspondingly, there are two anti-foolproof grooves 203 for the toggle block and two anti-foolproof grooves 303 for the corner adjustment block, so as to accommodate the two anti-foolproof protrusions 102.

[0046] As a specific embodiment of this solution, the following is an example:

[0047] (I) Component Preparation

[0048] The rotary shaft 1, the shift block 2, and the angle adjustment block 3 are manufactured using metal processing techniques (such as cutting and milling). The rotary shaft 1 is machined with a toothed path 101 and a misalignment prevention ridge 102. The shift block 2 is machined with a shift block insertion hole 201 containing a shift block toothed groove 202 and a shift block misalignment prevention groove 203. The angle adjustment block 3 is machined with an angle adjustment block insertion hole 301 containing an angle adjustment block toothed groove 302 and an angle adjustment block misalignment prevention groove 303. Simultaneously, a marking structure indicating the installation direction or position is made on the shift block 2. If stainless steel is selected, processes such as cutting, grinding, and heat treatment are performed to ensure strength and precision.

[0049] (II) Assembly process

[0050] Align the anti-foolproof structure: Align the anti-foolproof protrusion 102 of the rotating shaft 1 with the anti-foolproof groove 203 of the toggle block 2 and the anti-foolproof groove 303 of the corner adjustment block 3 to initially determine the installation direction.

[0051] Engaging gear path and tooth groove: Along the alignment direction, engage the gear path 101 of the rotating shaft 1 with the tooth groove 202 of the shift block and the tooth groove 302 of the angle adjustment block, and mount the shift block 2 and the angle adjustment block 3 onto the rotating shaft 1 to complete the assembly. During assembly, the marking structure helps to confirm the installation direction of the shift block 2 to ensure accuracy.

[0052] Debugging and fixing: After assembly, adjust the angle adjustment block 2 by adjusting the limit of its position on the rotating shaft 1 through the adjusting screw 6, test the valve opening and closing action, and ensure that the rotating shaft 1 rotates and the valve opens and closes accurately without jamming or misalignment; after debugging is correct, the component connection can be properly fixed as needed (such as necessary fasteners) to ensure working stability.

[0053] (III) Work Process

[0054] When the pneumatic actuator is working, the piston 4 moves horizontally within the cylinder body 7, driving the shift fork 5 to move. The shift fork 5 acts on the shift block 2. Because the shift block 2 and the rotating shaft 1 are engaged by a toothed groove and positioned by a foolproof structure, the shift block 2 can stably drive the rotating shaft 1 to rotate, thereby realizing the valve opening and closing. The angle adjustment block 3 is precisely installed through a foolproof structure and, together with the adjustment screw, limits the clockwise / counterclockwise rotation of the rotating shaft 1, ensuring that the valve is fully opened or closed, and guaranteeing precise control of the industrial process flow.

[0055] Through the above implementation method, the rotary shaft assembly can achieve precise assembly and stable operation, effectively solve existing technical problems, improve the control performance of the pneumatic actuator on the valve, and meet the needs of industrial automation production.

[0056] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this utility model are included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A rotary shaft assembly for a pneumatic actuator, comprising a rotary shaft (1), a lever (2), and an angular adjustment block (3), characterized in that, The outer wall of the rotating shaft (1) is provided with a toothed path (101), the lever (2) is provided with a lever insertion hole (201), and the wall of the lever insertion hole (201) is provided with a lever tooth groove (202) that matches the toothed path (101); the angle adjustment block (3) is provided with an angle adjustment block insertion hole (301), and the wall of the angle adjustment block insertion hole (301) is provided with an angle adjustment block tooth groove (302) that matches the toothed path (101).

2. A rotating shaft assembly for a pneumatic actuator as defined in claim 1, wherein, The toothed path (101) is a structure that extends axially along the rotating shaft (1). The toothed groove of the paddle block (202) and the toothed groove of the angle adjustment block (302) respectively mesh with the toothed path (101) to realize power transmission.

3. A rotating shaft assembly for a pneumatic actuator as defined in claim 1, wherein The rotating shaft (1) is provided with a foolproof protrusion (102) on the tooth path (101), the inner wall of the lever tooth groove (202) is provided with a lever foolproof groove (203) adapted to the foolproof protrusion (102), and the inner wall of the angle adjustment block tooth groove (302) is provided with an angle adjustment block foolproof groove (303) adapted to the foolproof protrusion (102).

4. A rotating shaft assembly for a pneumatic actuator as defined in claim 3, wherein The anti-misalignment protrusion (102) cooperates with the anti-misalignment groove of the toggle block (203) and the anti-misalignment groove of the corner adjustment block (303) to limit the installation position between the rotating shaft (1), the toggle block (2) and the corner adjustment block (3) to prevent misalignment during installation.

5. A rotating shaft assembly for a pneumatic actuator according to claim 3 or 4, wherein There are two anti-foolproof protrusions (102), which are symmetrically arranged on the outer wall of the rotating shaft (1). Correspondingly, there are two anti-foolproof grooves (203) for the toggle block and two anti-foolproof grooves (303) for the corner adjustment block.

6. A rotating shaft assembly for a pneumatic actuator as defined in claim 1, wherein, The lever (2) is used to receive the force of the lever (5) and drive the rotating shaft (1) to rotate when the piston (4) drives the lever (5) to move, so as to realize the opening and closing action of the valve.

7. A rotating shaft assembly for a pneumatic actuator as defined in claim 1, wherein The angle adjustment block (3) adjusts the rotation limit of the rotating shaft (1) by adjusting the screw (6) to ensure that the valve is fully open or fully closed.

8. A rotating shaft assembly for a pneumatic actuator as defined in claim 1, wherein, The rotating shaft (1), the lever (2), and the angle adjustment block (3) are all made of metal.

9. A rotating shaft assembly for a pneumatic actuator according to claim 8, wherein, The metal material is stainless steel, which has corrosion resistance and is suitable for complex industrial environments.

10. A rotating shaft assembly for a pneumatic actuator as defined in claim 1, wherein, The dial (2) is provided with a marking structure for indicating the installation direction or position.

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