CN222185973U - A pneumatic clutch linear actuator - Google Patents

Abstract

The utility model discloses a pneumatic clutch linear actuating mechanism which comprises an actuating box body with air holes on the upper side and the lower side, wherein a rotating shaft is rotatably arranged in the actuating box body, a switching cylinder is sleeved outside the rotating shaft, a piston is fixedly sleeved outside the switching cylinder, a transmission pin is arranged outside the rotating shaft, a spiral groove in spiral sliding fit connection with the transmission pin is arranged on the wall of the switching cylinder, a rotary table is rotatably arranged between the piston and the inner wall of the actuating box body, air holes on the upper side and the lower side of the rotary table are respectively arranged on the upper side and the lower side of the rotary table, an air passage is respectively corresponding to the air holes on the upper side and the lower side of the actuating box body, a hand wheel mechanism is arranged at the top of the rotating shaft, an output shaft of the hand wheel mechanism is connected with the top end of the rotating shaft through a clutch mechanism, and the rotary table controls the clutch state of the clutch mechanism through self rotation.

Description

Pneumatic clutch linear actuating mechanism

Technical Field

The utility model belongs to the technical field of pneumatic actuating mechanisms, and relates to a pneumatic clutch linear actuating mechanism.

Background

The pneumatic actuating mechanism takes a high-pressure air source as power, and the pressure generated by the driving air drives a movable piece in the actuating mechanism to perform linear movement, rotation, swing and other actuating actions. The pneumatic actuating mechanism for linear motion is most commonly used, and the existing pneumatic actuating mechanism for linear motion is to introduce an air source into a cavity of a piston, push the piston to perform linear motion by driving air, and further drive an actuating member such as a connecting rod, a contact and the like connected with the piston to perform linear motion. The moving stroke and the actuating force of the actuating member are influenced by the driving air pressure, the actuating action of the linear pneumatic actuating mechanism is abnormal once the driving air pressure is abnormal, and even the linear pneumatic actuating mechanism is damaged when serious. The existing linear pneumatic actuating mechanism cannot be disconnected with an air source in time when the air pressure of the driving air is abnormal, and meanwhile cannot be quickly switched from an air driving state to a manual control state in time.

The utility model discloses a pneumatic clutch linear actuating mechanism aiming at the technical problems existing in the conventional linear pneumatic actuating mechanism.

Disclosure of utility model

The utility model aims to provide a pneumatic clutch linear actuator which can normally perform pneumatic linear action when the driving air pressure is normal, can timely disconnect the driving air from the linear actuator when the driving air pressure is abnormal, and can rapidly switch to a manual state to operate the linear actuator.

The utility model is realized by the following technical scheme:

A pneumatic clutch linear actuating mechanism comprises an actuating box body with air holes on the upper side and the lower side, a rotating shaft is rotatably arranged in the center of the inside of the actuating box body, a switching cylinder is sleeved outside the rotating shaft, a piston is fixedly sleeved outside the switching cylinder, a transmission pin is arranged outside the rotating shaft, a spiral groove in spiral sliding fit connection with the transmission pin is arranged on the cylinder wall of the switching cylinder, a rotary table is rotatably arranged between the piston and the inner wall of the actuating box body, air holes on the upper side and the lower side of the rotary table, which correspond to the air holes on the upper side and the lower side of the actuating box body respectively, a hand wheel mechanism is arranged at the top of the rotating shaft, an output shaft of the hand wheel mechanism is connected with the top end of the rotating shaft through a clutch mechanism, and the rotary table controls the clutch state of the clutch mechanism through rotation of the rotary table.

In the pneumatic driving mode, the clutch mechanism is in a disconnected state, the turntable rotates to a first position, and air passages on the upper side and the lower side of the turntable are respectively connected with air holes on the upper side and the lower side of the wall of the execution box body. The air passages on the upper side and the lower side of the turntable are respectively positioned on the upper side and the lower side of the piston, and air holes are communicated through the air passages, so that air is introduced into the execution box body to drive the piston to drive the switching cylinder to axially slide along the rotating shaft so as to realize execution of air driving action. When the air source fails or the air pressure in the execution box body is abnormal, in order to avoid damaging the piston and the switching cylinder, the rotary table rotates to a second position at the moment, and meanwhile, the clutch structure is driven to be converted into a state of connecting an output shaft of the hand wheel structure with the rotating shaft through the rotation of the rotary table to the second position. At this time, the air passages on the upper and lower sides of the turntable are disconnected from the air holes on the upper and lower sides of the wall of the execution box, and at this time, air cannot enter the internal driving piston of the execution box. But can drive the rotating shaft to rotate circumferentially through the hand wheel mechanism, and then drive the switching cylinder and the piston to move axially through the action of the transmission pin on the outer side of the rotating shaft on the spiral groove on the switching cylinder so as to realize the execution of manual operation.

In order to better realize the utility model, the clutch mechanism further comprises a control pin and clutch clamping pieces, wherein the two clutch clamping pieces are symmetrically arranged between the output shaft of the hand wheel mechanism and the top end of the rotating shaft, the bottom of each clutch clamping piece is provided with the control pin, and the turntable is provided with a variable-diameter arc-shaped groove in spiral sliding fit connection with the control pin.

In order to better realize the utility model, the clutch mechanism further comprises a clutch control disc, wherein the clutch control disc is detachably clamped at the top of the turntable, and a reducing arc-shaped groove is formed in the clutch control disc.

In order to better realize the utility model, further, a rotary table driving device is arranged on the outer side of the execution box body, the rotary table driving device comprises a rotary table driving bevel gear, a rotary table bevel gear ring and a driving hand wheel shaft, the rotary table bevel gear ring is sleeved on the outer side of the rotary table, the rotary table driving bevel gear is rotatably arranged on the outer side of the execution box body, the rotary table driving bevel gear is in meshed connection with the rotary table bevel gear ring, and one end of the rotary table driving bevel gear is provided with the driving hand wheel shaft.

In order to better realize the utility model, the driving hand wheel shaft is further sleeved with a driving hand wheel or is connected with an output shaft of a driving motor.

In order to better realize the utility model, the hand wheel mechanism further comprises a first bevel gear, a second bevel gear, a hand wheel mounting box body, a transmission shaft, an output shaft and an operation hand wheel, wherein the output shaft is coaxially and rotatably arranged in the hand wheel mounting box body relative to the rotation shaft, a clutch mechanism is arranged between the bottom end of the output shaft and the top end of the rotation shaft, the second bevel gear is sleeved outside the output shaft, the transmission shaft is rotatably arranged on one side of the hand wheel mounting box body perpendicular to the axial direction of the output shaft, a first bevel gear which is in matched engagement with the second bevel gear is sleeved at one end of the transmission shaft, and the operation hand wheel is sleeved at the other end of the transmission shaft.

In order to better realize the utility model, further, the operation hand wheel is provided with a rotation scale along the circumferential direction.

In order to better realize the utility model, further, one end of the air passage, which is close to the air hole, is provided with a conical flow guide opening, and the diameter of the conical flow guide opening is larger than that of the air hole.

In order to better realize the utility model, further, a pressure sensor is arranged at the air passage.

Compared with the prior art, the utility model has the following advantages:

according to the utility model, the turntable is arranged in the execution box body in a rotating way, the air passage corresponding to the air hole is arranged on the turntable, the butt joint or disconnection of the air passage and the air hole can be realized by rotating the turntable, when the driving air pressure is abnormal, the air passage and the air hole are disconnected by rotating the turntable so as to prevent the driving air from continuously acting on the piston to damage the linear execution mechanism, and meanwhile, the clutch mechanism is used for connecting the output shaft of the hand wheel mechanism with the rotating shaft by rotating the turntable, so that the linear feeding of the switching cylinder is manually controlled by the hand wheel mechanism, the rapid conversion from the pneumatic driving of the linear execution mechanism to the manual operation of the linear execution mechanism is realized, and the normal operation of the linear execution mechanism is ensured.

Drawings

FIG. 1 is a schematic diagram of a pneumatic clutch linear actuator;

FIG. 2 is a schematic diagram of a clutch mechanism;

FIG. 3 is a schematic diagram of a turntable driving unit;

FIG. 4 is a schematic structural view of a hand wheel mechanism;

FIG. 5 is a schematic view of the installation of the clutch clip;

Fig. 6 is a schematic installation view of the clutch control disc.

The device comprises a 1-executing box body, a 2-rotating shaft, a 3-switching cylinder, a 4-piston, a 5-transmission pin, a 6-spiral groove, a 7-rotary table, an 8-hand wheel mechanism, a 9-clutch mechanism, a 10-rotary table driving device, a 81-first bevel gear, a 82-second bevel gear, a 83-hand wheel mounting box body, a 84-transmission shaft, a 85-output shaft, a 86-operating hand wheel, a 91-clutch control plate, a 92-control pin, a 93-clutch clamping piece, a 94-inner clamping piece, a 95-sliding block, a 911-variable diameter arc-shaped groove, a 101-rotary table driving bevel gear, a 102-rotary table conical gear ring and a 103-driving hand wheel shaft.

Detailed Description

The following detailed description is exemplary and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the utility model clearly indicates otherwise, and it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

For convenience of description, the words "upper", "lower", "left" and "right" in the present utility model, if they mean only that the directions are consistent with the upper, lower, left, and right directions of the drawings per se, and do not limit the structure, only for convenience of description and simplification of the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

The terms "mounted," "connected," "secured," and the like in this disclosure are to be construed broadly, and they may be, for example, fixedly connected, detachably connected, or integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediate medium, internally connected, or the interaction of two elements, as will be apparent to those of ordinary skill in the art, in view of the detailed description of the disclosure.

Example 1:

The pneumatic clutch linear actuating mechanism comprises an actuating box body 1 with air holes on the upper side and the lower side, a rotating shaft 2 is rotatably arranged at the center of the inner part of the actuating box body 1, a switching cylinder 3 is sleeved outside the rotating shaft 2, a piston 4 is fixedly sleeved outside the switching cylinder 3, a transmission pin 5 is arranged outside the rotating shaft 2, a spiral groove 6 in spiral sliding fit connection with the transmission pin 5 is arranged on the cylinder wall of the switching cylinder 3, a rotary table 7 is rotatably arranged between the piston 4 and the inner wall of the actuating box body 1, air holes on the upper side and the lower side of the rotary table 7, which correspond to the air holes on the upper side and the lower side of the actuating box body 1, are respectively provided with an air passage, a hand wheel mechanism 8 is arranged at the top of the rotating shaft 2, an output shaft of the hand wheel mechanism 8 is connected with the top end of the rotating shaft 2 through a clutch mechanism 9, and the rotary table 7 controls the clutch state of the clutch mechanism 9 through rotation of the hand wheel mechanism.

The center of the inner cavity of the execution box body 1 is rotatably provided with a rotating shaft 2 through a bearing, the outer part of the rotating shaft 2 is slidably sleeved with a switching cylinder 3, and the switching cylinder 3 can rotate circumferentially relative to the rotating shaft 2. Meanwhile, a transmission pin 5 is arranged on the outer side face of the rotating shaft 2, a spiral groove 6 arranged along a spiral line is arranged on the wall of the switching cylinder 3, and the transmission pin 5 extends into the spiral groove 6 and is in spiral sliding fit connection with the spiral groove 6. When the rotating shaft 2 rotates relative to the switching cylinder 3, the switching cylinder 3 is driven to realize axial feeding through the cooperation of the transmission pin 5 and the spiral groove 6.

The outside of the adapter cylinder 3 is sleeved with a piston 4 through a connecting flange or a positioning shoulder, a turntable 7 is rotatably arranged between the piston 4 and the inner side wall of the execution box 1, and the outer annular surface of the piston 4 is coupled, slid and rotationally connected with the inner annular surface of the turntable 7, namely, the piston 4 can rotate relative to the turntable 7 and also can axially slide relative to the turntable 7. The upper and lower sides of the turntable 7 are respectively provided with air passages corresponding to air holes on the tank walls on the upper and lower sides of the execution tank 1, and the two air passages are respectively positioned on the upper and lower sides of the piston 4. When the rotary table 7 rotates to the first position, the clutch mechanism 9 is in a disconnected state, the air hole is communicated with the air channel, driving air provided by an external air source enters the execution box body 1 through the air channel, and pressure difference is further generated on the upper side and the lower side of the piston 4 through controlling air supply pressure on the upper side and the lower side of the piston 4 so as to drive the piston 4 to axially move to drive the switching cylinder 3 to axially feed, and a switching joint or a switching joint is arranged at one end of the switching cylinder 3 extending to the outside of the execution box body 1 and used for connecting external execution mechanisms such as a push rod and a contact.

In order to avoid the piston 4 and the adapter cylinder 3 from being damaged in an abnormal situation when the external air source is failed or the air pressure inside the execution case 1 is abnormal, it is necessary to stop the supply of air to the inside of the execution case 1. At this time, the rotary table 7 is rotated to the second position, and meanwhile, the rotary table 7 is rotated to the second position to drive the clutch device 9 to be converted to a connection state so as to realize that the output shaft of the hand wheel mechanism 8 is connected with the top end of the rotating shaft 2, and meanwhile, when the rotary table 7 is rotated to the second position, the air passage and the air hole are staggered and are not communicated any more, and at this time, driving air cannot enter the execution box 1, so that protection of the piston 4 and the switching cylinder 3 is realized. At this time, the rotating shaft 2 can be driven to rotate through the hand wheel structure 8, and the rotating shaft 2 is externally provided with a transmission pin 5 which is in spiral sliding fit with the spiral groove 6 on the switching cylinder 3, so that the switching cylinder 3 is driven to perform manual axial feeding.

After the air source is restored or the air pressure in the execution box body 1 is restored to be normal, the turntable 7 can be rotated from the second position to the first position, the air hole and the air passage are reconnected, the clutch mechanism 9 is disconnected, and the air drive axial feeding of the switching cylinder 3 is restored again.

Example 2:

The pneumatic clutch linear actuator of the present embodiment is modified on the basis of embodiment 1, and as shown in fig. 2, 5 and 6, the clutch mechanism 9 is disposed in a clutch housing, which is disposed at the top of the actuator housing 1. The clutch mechanism 9 comprises a control pin 92 and clutch clamping pieces 93, the two clutch clamping pieces 93 are symmetrically arranged between the output shaft of the hand wheel mechanism 8 and the top end of the rotating shaft 2, the bottom of each clutch clamping piece 93 is provided with the control pin 92, and the turntable 7 is provided with a variable-diameter arc-shaped groove 911 connected with the control pin 92 in a spiral sliding fit manner. The clutch clamping piece 93 is provided with the interior clamping piece 94 on being close to the clamping face of pivot 2, and the lateral surface of interior clamping piece 94 is connected with the clamping face normal running fit of clutch clamping piece 93, is provided with anti-skidding decorative pattern or anti-skidding arch on the clamping face of interior clamping piece 94 near pivot 2, is provided with anti-skidding decorative pattern or anti-skidding arch on the top lateral surface of pivot 2 and the bottom lateral surface of the output shaft 85 of hand wheel mechanism. The top of the clutch clamping piece 93 is provided with a slide block 95, and the slide block 95 is in sliding connection with a slide groove on the inner top end surface of the clutch box body.

Further, the clutch mechanism 9 further comprises a clutch control disc 91, the clutch control disc 91 is detachably clamped at the top of the turntable 7, and the clutch control disc 91 is provided with a reducing arc groove 911.

When the turntable 7 rotates from the first position to the second position, the variable-diameter arc groove 911 is driven to move from one end with a large diameter to one end with a small diameter, the control pins 92 at the bottoms of the clutch clamping pieces 93 at the two sides are extruded through the variable-diameter arc groove 911, the clutch clamping pieces 93 at the two sides are in linear sliding fit with the sliding grooves, so that the clutch clamping pieces 93 at the two sides are close to each other and move until the turntable 7 rotates to the second position, the inner clutch clamping pieces 94 at the two sides are driven to clamp and connect the output shaft of the hand wheel mechanism 8 with the rotating shaft 2, and at the moment, the output shaft of the hand wheel mechanism 8 can drive the rotating shaft 2 to synchronously rotate.

When the rotary table 7 rotates from the second position to the first position, the variable-diameter arc-shaped groove 911 is driven to move from the small-diameter end to the large-diameter end, the control pins 92 at the bottoms of the clutch clamping pieces 93 at the two sides are further extruded through the variable-diameter arc-shaped groove 911, the clutch clamping pieces 93 at the two sides are far away from each other and move through linear sliding fit of the sliding blocks 95 and the sliding grooves, the inner clamping pieces 94 at the two sides are driven to loosen the output shaft of the hand wheel mechanism 8 from the rotating shaft 2 until the rotary table 7 rotates to the first position, and at the moment, the output shaft of the hand wheel mechanism 8 cannot drive the rotating shaft 2 to synchronously rotate.

The top of carousel 7 is provided with the mounting groove, and the inside detachable clamping of mounting groove or through the screw installation have separation and reunion control panel 91, drive separation and reunion control panel 91 and carry out synchronous rotation promptly when carousel 7 rotates. The same principle as the above, when the clutch control disc 91 rotates, the reducing arc groove 911 is driven to press the control pin 92 at the bottom of the clutch clip 93, so as to drive the clutch clips 93 at two sides to move close to each other or move far away from each other.

Other portions of this embodiment are the same as those of embodiment 1, and thus will not be described in detail.

Example 3:

The pneumatic clutch linear actuator of the embodiment is improved on the basis of embodiment 1 or 2, as shown in fig. 3, a turntable driving device 10 is arranged on the outer side of the actuating box 1, the turntable driving device 10 comprises a turntable driving bevel gear 101, a turntable cone gear ring 102 and a driving hand wheel shaft 103, the turntable cone gear ring 102 is sleeved on the outer side of the turntable 7, the turntable driving bevel gear 101 is rotatably arranged on the outer side of the actuating box 1, the turntable driving bevel gear 101 is in meshed connection with the turntable cone gear ring 102, and one end of the turntable driving bevel gear 101 is provided with the driving hand wheel shaft 103.

The hand wheel shaft 103 is driven to rotate so as to drive the rotary disc to drive the bevel gear 101 to rotate, and then the rotary disc bevel gear 102 is driven to rotate through the meshing structure, so that the rotary disc 7 is driven to rotate finally. Meanwhile, through the meshing self-locking structure between the rotary disc driving bevel gear 101 and the rotary disc bevel gear ring 102, after the rotation driving hand wheel shaft 103 is stopped, the position of the rotary disc 7 is correspondingly fixed, and the condition of spontaneous rotation of the rotary disc 7 can not occur.

Further, the driving hand wheel shaft 103 is sleeved with a driving hand wheel or is connected with an output shaft of a driving motor, and the driving hand wheel shaft 103 is driven to rotate by the driving hand wheel or the driving motor, so that the turntable 7 is driven to be rapidly switched between the first position and the second position.

Other portions of this embodiment are the same as those of embodiment 1 or 2, and thus will not be described in detail.

Example 4:

the pneumatic clutch linear actuator of the embodiment is improved on the basis of any one of embodiments 1-3, as shown in fig. 4, the hand wheel mechanism 8 comprises a first bevel gear 81, a second bevel gear 82, a hand wheel mounting box 83, a transmission shaft 84, an output shaft 85 and an operation hand wheel 86, the output shaft 85 is coaxially and rotatably arranged in the hand wheel mounting box 83 relative to the rotation shaft 2, a clutch mechanism 9 is arranged between the bottom end of the output shaft 85 and the top end of the rotation shaft 2, the second bevel gear 82 is sleeved outside the output shaft 85, one side of the hand wheel mounting box 83 is provided with the transmission shaft 84 perpendicular to the axial rotation of the output shaft 85, one end of the transmission shaft 84 is sleeved with the first bevel gear 81 which is in mating engagement with the second bevel gear 82, and the other end of the transmission shaft 84 is sleeved with the operation hand wheel 86.

The hand wheel mounting box 83 passes through connecting bolt fixed mounting at the top of carrying out box 1, and output shaft 85 is installed in the rotation of the inside of hand wheel mounting box 83 along vertical direction through first bearing group, and output shaft 85 and pivot 2 coaxial setting. A transmission shaft 84 is rotatably mounted on the side surface of the hand wheel mounting box 83 along the horizontal direction through a second bearing group, one end of the transmission shaft 84 extends to the inside of the hand wheel mounting box 83 and is sleeved with a first bevel gear 81, and the top end of the transmission shaft 84 is sleeved with a second bevel gear 82 in meshed connection with the first bevel gear 81. The other end of the transmission shaft 84 extends to the outside of the hand wheel mounting box 83 and is sleeved with an operation hand wheel 86, the transmission shaft 84 is driven to rotate through the operation hand wheel 86 conveniently and laborsaving, and then the transmission shaft 85 is driven to rotate through the meshing structure of the first bevel gear 81 and the second bevel gear 82, and the rotating shaft 2 can be driven to rotate through the transmission shaft 85 under the state that the clutch structure 9 is closed.

Further, a rotation scale is arranged on the operation hand wheel 86 along the circumferential direction, the rotation number of the operation hand wheel 86 can be obtained by observing the rotation scale, and then the axial feeding stroke of the switching cylinder 3 can be obtained by the relation between the rotation number of the operation hand wheel 86 calibrated in advance and the axial feeding distance of the switching cylinder 3.

Other portions of this embodiment are the same as any of embodiments 1 to 3, and thus will not be described in detail.

Example 5:

The pneumatic clutch linear actuating mechanism of the embodiment is improved on the basis of any one of the embodiments 1-4, one end, close to an air hole, of an air channel is provided with a conical flow guide port, and the diameter of the conical flow guide port is larger than that of the air hole.

When the air passage is communicated with the air hole, the driving gas from the air hole is collected and guided into the air passage through the conical guide opening at the end part of the air passage, so that the driving gas can more intensively enter the execution box body 1.

Further, the air passage is provided with a pressure sensor, the pressure inside the air passage is detected in real time through the pressure sensor, when the pressure abnormality is detected, if the pressure is detected to exceed the upper calibration limit value or the pressure is detected to be lower than the lower calibration limit value, the pressure sensor sends a signal to external control equipment, the external control equipment controls the driving motor at the end part of the driving hand wheel shaft 103 in real time to start, drives the driving hand wheel shaft 103 to rotate, and finally realizes timely switching of the driving turntable 7 between the first position and the second position.

Other portions of this embodiment are the same as any of embodiments 1 to 4, and thus will not be described in detail.

The above is only a preferred embodiment of the present utility model, and the present utility model is not limited in any way, and any simple modification and equivalent changes of the above embodiments according to the technical substance of the present utility model fall within the protection scope of the present utility model.

Claims (9)

1. The pneumatic clutch linear actuating mechanism comprises an actuating box body (1) with air holes on the upper side and the lower side, and is characterized in that a rotating shaft (2) is rotatably arranged in the center of the inside of the actuating box body (1), a switching cylinder (3) is sleeved outside the rotating shaft (2), a piston (4) is fixedly sleeved outside the switching cylinder (3), a transmission pin (5) is arranged outside the rotating shaft (2), a spiral groove (6) in spiral sliding fit connection with the transmission pin (5) is formed in the cylinder wall of the switching cylinder (3), a rotary table (7) is rotatably arranged between the piston (4) and the inner wall of the actuating box body (1), air holes on the upper side and the lower side of the rotary table (7) corresponding to the upper side and the lower side of the actuating box body (1) respectively, a hand wheel mechanism (8) is arranged at the top of the rotating shaft (2), an output shaft of the hand wheel mechanism (8) is connected with the top end of the rotating shaft (2) through a clutch mechanism (9), and the clutch state of the rotary table (7) is controlled through self rotation.

2. The pneumatic clutch linear actuator according to claim 1, wherein the clutch mechanism (9) comprises a control pin (92) and clutch clamping pieces (93), the two clutch clamping pieces (93) are symmetrically arranged between the output shaft of the hand wheel mechanism (8) and the top end of the rotating shaft (2), the bottom of each clutch clamping piece (93) is provided with the control pin (92), and the turntable (7) is provided with a reducing arc groove (911) connected with the control pin (92) in a spiral sliding fit manner.

3. A pneumatic clutch linear actuator according to claim 1, characterized in that the clutch mechanism (9) further comprises a clutch control disc (91), the clutch control disc (91) is detachably clamped on the top of the turntable (7), and a reducing arc-shaped groove (911) is arranged on the clutch control disc (91).

4. A pneumatic clutch linear actuator according to any one of claims 1-3, characterized in that a turntable driving device (10) is arranged on the outer side of the actuator box (1), the turntable driving device (10) comprises a turntable driving bevel gear (101), a turntable cone gear ring (102) and a driving hand wheel shaft (103), the turntable cone gear ring (102) is sleeved on the outer side of the turntable (7), the turntable driving bevel gear (101) is rotatably arranged on the outer side of the actuator box (1), the turntable driving bevel gear (101) is in meshed connection with the turntable cone gear ring (102), and one end of the turntable driving bevel gear (101) is provided with the driving hand wheel shaft (103).

5. A pneumatic clutch linear actuator according to claim 4, characterized in that the drive hand wheel shaft (103) is externally sleeved with a drive hand wheel or connected to the output shaft of a drive motor.

6. A pneumatic clutch linear actuator according to any one of claims 1-3, characterized in that the hand wheel mechanism (8) comprises a first bevel gear (81), a second bevel gear (82), a hand wheel mounting box (83), a transmission shaft (84), an output shaft (85) and an operation hand wheel (86), the output shaft (85) is coaxially rotated relative to the rotation shaft (2) and arranged in the hand wheel mounting box (83), a clutch mechanism (9) is arranged between the bottom end of the output shaft (85) and the top end of the rotation shaft (2), the second bevel gear (82) is sleeved outside the output shaft (85), the transmission shaft (84) is arranged on one side of the hand wheel mounting box (83) perpendicular to the axial rotation of the output shaft (85), the first bevel gear (81) which is in matched engagement with the second bevel gear (82) is sleeved at one end of the transmission shaft (84), and the operation hand wheel (86) is sleeved at the other end of the transmission shaft (84).

7. A pneumatic clutch linear actuator according to claim 6, wherein the operating hand wheel (86) is provided with a rotation scale in the circumferential direction.

8. A pneumatic clutch linear actuator as claimed in any one of claims 1 to 3 wherein the air passage is provided with a tapered conduction port at one end thereof adjacent the air hole, the tapered conduction port having a diameter greater than the diameter of the air hole.

9. A pneumatic clutch linear actuator as claimed in claim 8 wherein a pressure sensor is provided at the air passage.