Manual clutch mechanism of electric actuator

Abstract

The utility model discloses a manual clutch mechanism of an electric actuator, which comprises a box body, and a worm piece which is meshed with a worm gear on the actuator to open and close is rotatably arranged in the box body in a penetrating manner through an arranged bearing piece. A motor is fixed to a shell, extending outwards, on one side of the outer portion of a machine box through a mounting sliding base and a guide fixing rod, a rotating shaft of the motor corresponds to a square butt joint groove B in one end of a worm part, and when the actuator is switched to be in a manual state, the motor is made to be separated from one end of the worm part in a sliding mode through the mounting sliding base fixed to the outer portion of the motor; the motor does not participate in the work of the manual switch actuator, the actuator switch is easier to operate, the motor does not become the load obstruction of the manual operation actuator switch, the motor can be completely separated from the worm part in the manual switching operation, and the problems and defects proposed in the background technology are further solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of actuators, and in particular relates to a manual clutch mechanism of an electric actuator. Background Art

[0002] Electric actuators are primarily used for the automatic control of valves, enabling local or remote control of valves. They are widely used in the fields of hydropower, petroleum, and chemical engineering. One current manual clutch for electric actuators is that the handwheel is not connected to the worm gear, but instead directly drives the output. This presents a problem, making manual switching particularly difficult in locations with large torque outputs. In the event of a stuck valve, the worm gear self-locks, maintaining the output force and preventing the clutch from switching. Another manual clutch for electric actuators is that the handwheel is connected to the worm gear, but this requires pushing and turning the handwheel simultaneously, meaning that force in both directions is required to open or close the valve. Furthermore, some valves are equipped with a reduction gearbox, requiring multiple turns of cranking, which is very inconvenient. Manual operation of the actuator is particularly difficult at high altitudes, especially when the actuator is difficult to operate manually.

[0003] To this end, a manual clutch mechanism for an electric actuator with the announcement number "CN212928938U" includes a housing, a motor disposed within the housing, a worm gear and a worm that mesh with each other, a handwheel end cover that is detachably provided on one side of the housing via bolts, one end of the worm gear is connected to the rotating shaft of the motor, and the motor is connected to a power supply. A push rod is movably provided on the handwheel end cover, and the inner side of the push rod can drive the worm gear to rotate via a linkage device. A pull pin that can be inserted into the linkage device is movably provided on the housing, and the pull pin is equipped with a reset device. The linkage device of the manual clutch mechanism of this electric actuator includes two modes: direct drive and speed increase. This greatly reduces the inventory of production parts and mold investment, and can meet the needs of different customers for multiple turns of the actuator and easy shaking of the handwheel. The two manual clutch modes are provided in the housing, and both share a micro switch to stop the motor, so that the handwheel can safely open or close the valve in the event of misoperation.

[0004] However, for the manual clutch mechanism of the above-mentioned X electric actuator, although a handwheel end cover is detachably provided on the other side of the box body by bolts, and one end of the worm is connected to the rotating shaft of the motor to realize the electric drive switch of the actuator, there are still the following more obvious defects during use: the above-mentioned worm and the motor are fixedly connected. When switching to the handwheel to switch the actuator, since the worm and the motor rotating shaft are connected in the handwheel rotation switch, there will be magnetic friction in the stopped state of the motor, and a larger rotation force is required to switch the actuator, so the manual switch of the actuator is more laborious and not easy to rotate the handwheel. Utility Model Content

[0005] The purpose of the present utility model is to provide a manual clutch mechanism for an electric actuator to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a manual clutch mechanism of an electric actuator, comprising:

[0007] A box body, wherein a worm member is provided in the interior of the box body and is rotated through a bearing member provided therein and is engaged with a worm gear on the actuator to open and close the box body. A handwheel rotating rod is provided in an outwardly extending housing provided on one side of the box body and is limitedly slidably connected to one end of the worm member. A guide limit plate is provided on one side of the handwheel rotating rod to limit the handwheel rotating rod to prevent it from moving back.

[0008] The motor, the upper and lower ends of the motor shell are clamped with mounting slides for sliding the motor and limiting the push-pull docking transmission with the other end of the worm gear. The mounting slides are movably penetrated by a guide fixing rod for guiding the sliding of the motor, and one end of the guide fixing rod is fixed to a protruding shell extending outward from the other side of the box body and corresponds to the other end of the worm gear.

[0009] Preferably, a guide cylinder is provided on one side wall of the shell extending outward from one side of the box body, and a handwheel turning rod is inserted into the interior of the shell from one end of the guide cylinder. A square docking groove A is provided at one end of the handwheel turning rod to realize the switching between the manual turning rod and the actuator.

[0010] Preferably, the two sides of the guide limit plate are movably penetrated by guide vertical rods fixed on both sides of the shell extending outward from one side of the box body, and the upper end surface of the guide limit plate is connected to the rotating screw with a thread to the outer upper end of the shell extending outward from one side of the box body by a bearing seat, so as to limit the manual rotating rod after separation and avoid back movement.

[0011] Preferably, a square docking groove B is provided at one end of the rotating shaft of the motor for interlocking with the worm member, so that the actuator can separate the motor from the worm member during manual switching.

[0012] Preferably, both ends of the worm member extend to the outside of both sides of the box body through bearings, and the extended parts at both ends of the worm member are provided with square docking limit blocks, which can switch the actuator between electric and manual operation.

[0013] Preferably, a locking screw is threaded on the outer surface of the mounting slide, and one end of the locking screw is threaded through the interior of the mounting slide and pressed against the surface of the guide fixing rod, so that the position of the motor can be locked after movement.

[0014] Compared with the existing technology, the technical effects and advantages of the utility model are as follows: the manual clutch mechanism of the electric actuator is fixed to the shell extending outward from the outside of the chassis by means of a mounting slide and a guide fixing rod through the motor, and the rotating shaft of the motor is arranged to correspond to the square docking groove B at one end of the worm gear. When the actuator is switched to the manual state, the motor is allowed to slide away from one end of the worm gear through its externally fixed mounting slide, so that the motor does not participate in the work of the manual switch actuator, making the actuator switch easier and easier to operate, and the motor will not become a load obstacle for the manually operated actuator switch. The motor can be completely separated from the worm gear during the manual switching operation, further solving the problems and defects raised in the background technology.

[0015] The guide cylinder is movably sleeved on the outside of the handwheel rotating rod, and the guide cylinder is fixed in a shell extending outward from one side of the box body, and the front end of the guide cylinder is provided with a guide limit plate sliding through the guide vertical rod, and the square docking groove A at one end of the guide limit plate is combined with the docking limit block. When the actuator is switched to manual, it is only necessary to push the handwheel rotating rod in the guide cylinder to make the square docking groove A and the docking limit block combination at one end of the worm gear be plugged in, and the manual rotating rod can be directly pulled to one side to disengage it without manual operation, and the guide limit plate can be used to block it to prevent it from moving back, so that the manual switching of the actuator can be achieved, thereby making the switching between manual and electric modes simpler and easier to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the electric actuator of the utility model in electric mode;

[0017] Figure 2 This is a structural diagram of the electric actuator of the utility model in manual mode;

[0018] Figure 3 This is a side view of the guide tube structure of the utility model;

[0019] Figure 4 This is a side structural diagram of the worm member of the present invention.

[0020] In the figure: 1. Box body; 2. Worm gear; 3. Handwheel rod; 4. Guide limit plate; 5. Motor; 6. Mounting slide; 7. Guide fixing rod; 8. Guide cylinder; 9. Square docking groove A; 10. Rotating screw; 11. Square docking groove B; 12. Docking limit block; 13. Locking screw; 14. Guide vertical rod. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4 The utility model provides a technical solution: a manual clutch mechanism of an electric actuator, comprising:

[0023] The box body 1 has a bearing member provided inside which is rotated and provided with a worm member 2 which meshes with the worm gear on the actuator to open and close. The manual and automatic switching connection parts at both ends of the worm member 2 are located on the outside of both sides of the box body 1, which is conducive to the switching of the two modes of the actuator. A handwheel rod 3 which is limitedly slidably docked with one end of the worm member 2 is provided in an outwardly extending shell on one side of the box body 1, so that the handwheel rod 3 can be manually operated to switch the actuator by pushing and pulling, and a guide plate 4 is provided on one side of the handwheel rod 3 to limit the handwheel rod 3 to prevent it from moving back, so that the handwheel rod 3 is blocked after it is separated from the worm member 2 to prevent the actuator from moving back during work;

[0024] The motor 5 and the motor 5 shell are clamped at the upper and lower ends with a mounting slide 6 for sliding the motor 5 and limiting the push-pull docking transmission with the other end of the worm member 2. The motor 5 is fixed by the mounting slide 6, which is beneficial for the motor 5 to slide back and forth to maintain the stability of the position. The mounting slide 6 is movably penetrated by a guide fixing rod 7 for guiding the sliding of the motor 5, so that the mounting slide 6 always maintains the same position during movement, and the worm member 2 can be rotated and adjusted to limit the docking with the motor 5, and one end of the guide fixing rod 7 is fixed on the protruding shell extending outward from the other side of the box body 1 and corresponds to the other end of the worm member 2, which is beneficial for the adjustment and docking of the rotating shaft of the motor 5 and one end of the worm member 2.

[0025] A guide cylinder 8 is provided on one side wall of the shell extending outward from one side of the box body 1, so that the handwheel rod 3 is guided and pulled to maintain position stability, and it is convenient for the handwheel rod 3 to adjust the docking position by rotation, and the handwheel rod 3 is inserted into the interior of the shell from one end of the guide cylinder 8, which is convenient for limiting and inserting with the square docking groove A9 at one end of the worm gear 2. A square docking groove A9 is provided at one end of the handwheel rod 3, and guide vertical rods 14 are fixed on both sides of the shell extending outward from one side of the box body 1 on both sides of the guide limit plate 4, and the upper end surface of the guide limit plate 4 is connected with a rotating screw 10 with a thread to the outer upper end of the shell extending outward from one side of the box body 1 by a bearing seat. The rotation of the rotating screw 10 pushes the guide limit plate 4 to move vertically up and down to block one end of the handwheel rod 3.

[0026] One end of the rotating shaft of the motor 5 is provided with a square docking groove B11 which is plugged into and linked with the worm gear 2, which is beneficial for the limited docking of the worm gear 2 and the rotating shaft of the motor 5 to realize the linkage, so that the actuator can realize the switching of the automatic mode. The two ends of the worm gear 2 extend to the outside of both sides of the box body 1 through the bearings, and the extensions at both ends of the worm gear 2 are provided with square docking limit blocks 12, which are beneficial for the worm gear 2 of the actuator to be freely switched between manual and automatic. A locking screw member 13 is provided on the outer side of the mounting slide 6, and one end of the locking screw member 13 is threaded through the interior of the mounting slide 6 and is tightened on the surface of the guide fixing rod 7, so that the motor 5 can be slid into position after the mounting slide 6 is fixed and locked with the locking screw member 13 to ensure the stability of the motor 5 during operation.

[0027] Specifically, when in use, the actuator first switches to electric mode, so that the motor 5 is fixed by the mounting slide 6, and the mounting slide 6 slides on the guide fixing rod 7, so that one end of the rotating shaft of the motor 5 is close to one end of the worm gear 2, and the square docking groove B11 on the rotating shaft of the motor 5 is adjusted to the same orientation as the docking limit block 12 at one end of the worm gear 2, so that the sliding of the motor 5 makes the rotating shaft use the square docking groove B11 to be plugged into the docking limit block 12 at one end of the worm gear 2, and then use the locking screw 13 to rotate and tighten on the surface of the guide fixing rod 7 to lock the position of the mounting slide 6, so that the position of the motor 5 can be made more firm and stable. At this time, the handwheel turning rod 3 moves to one side and moves back inside the guide cylinder 8, and then the rotating screw 10 is rotated and moved downward to push the guide limit plate 4 to follow and move down to the front end of the guide cylinder 8, so as to block the handwheel turning rod 3, so that the handwheel turning rod 3 does not participate in the work in the electric mode of the actuator.

[0028] During manual switching, the rotating screw 10 is rotated to drive the guide limit plate 4 to move upward, and move vertically upward on the guide vertical rod 14, and then the handwheel rod 3 is pushed into the inside of the box body 1, and one end of the handwheel rod 3 is approached to the docking limit block 12 at one end of the worm gear 2. At the same time, the square docking groove A9 on the handwheel rod 3 is adjusted in orientation so that the docking position of the square docking groove A9 is in the same orientation as the docking limit block 12. At this time, the handwheel rod 3 is docked on the docking limit block 12 and the worm gear 2 is driven to rotate to open and close the actuator. Before this, the motor 5 uses the guide sliding of the mounting slide 6 on the guide fixing rod 7 to separate from the docking limit block 12 at the other end of the worm gear 2, so that the motor 5 rotates in manual mode and does not participate in work, which makes manual adjustment of the actuator easier and easier to adjust.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A manual clutch mechanism for an electric actuator, characterized in that: include: A housing (1) is provided, wherein a worm member (2) is provided in the housing (1) for engaging with a worm wheel on an actuator for opening and closing via a bearing member provided therein, a handwheel rotating rod (3) is provided in an outwardly extending housing provided on one side of the housing (1) for limited sliding docking with one end of the worm member (2), and a guide limiting plate (4) is provided on one side of the handwheel rotating rod (3) for limiting the handwheel rotating rod (3) to prevent it from moving back. The motor (5) is provided with a mounting slide (6) clamped at the upper and lower ends of the housing of the motor (5) for sliding the motor (5) and limiting the push-pull docking transmission with the other end of the worm member (2). The mounting slide (6) is provided with a guide fixing rod (7) for guiding the sliding of the motor (5), and one end of the guide fixing rod (7) is fixed to a protruding shell extending outward from the other side of the box body (1) and corresponds to the other end of the worm member (2).

2. The manual clutch mechanism of an electric actuator according to claim 1, characterized in that: A guide cylinder (8) is provided on one side wall of the shell extending outward from one side of the box body (1), and a hand wheel turning rod (3) penetrates into the interior of the shell from one end of the guide cylinder (8), and a square docking groove A (9) is provided at one end of the hand wheel turning rod (3).

3. The manual clutch mechanism of an electric actuator according to claim 1, characterized in that: The two sides of the guide limit plate (4) are movably penetrated by guide vertical rods (14) fixed on both sides of the shell extending outward from one side of the box body (1), and the upper end surface of the guide limit plate (4) is connected to a rotating screw (10) with a thread connected to the outer upper end of the shell extending outward from one side of the box body (1) through a bearing seat.

4. The manual clutch mechanism of an electric actuator according to claim 1, characterized in that: One end of the rotating shaft of the motor (5) is provided with a square docking groove B (11) for plugging and linking with the worm member (2).

5. The manual clutch mechanism of an electric actuator according to claim 1, characterized in that: Both ends of the worm member (2) extend to the outside of both sides of the box body (1) through bearings, and the extended portions at both ends of the worm member (2) are both provided with square docking limit blocks (12).

6. The manual clutch mechanism of an electric actuator according to claim 1, characterized in that: A locking screw member (13) is provided on the outer surface of the mounting slide (6) through a thread, and one end of the locking screw member (13) is threadedly passed through the interior of the mounting slide (6) and pressed against the surface of the guide fixing rod (7).

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