A switching-free device for electric actuator

Abstract

The present invention discloses a switch-free device for an electric actuator, belonging to the technical field of electric actuator switching valves. The device comprises an actuator outer shell, a servo drive motor, and a manual control wheel. The output end of the servo drive motor penetrates into the interior of the actuator outer shell, and a first worm is fixedly mounted on the penetration end. The axial end of the manual control wheel also penetrates into the interior of the actuator outer shell, and a second worm is fixedly mounted on the penetration end. A switch-free linkage mechanism is configured at the internal axial position of the actuator outer shell. The design of a convex-shaped layered switch-free linkage mechanism and a double worm gear self-locking transmission system can solve the problem of reverse driving force transmission of the handwheel caused by the coupling of the transmission shaft in traditional electric actuators. The physical isolation of the power path is achieved by using independent gear rings arranged in upper and lower layers, which not only eliminates the operational risk of manually adjusting the dead zone, but also avoids the vibration and wear problem caused by the coupled transmission.

Description

Technical Field

[0001] The present invention relates to the technical field of electric actuator switching valves, and more particularly to a switching-free device for an electric actuator. Background Art

[0002] As the core execution unit of the industrial automation system, the electric actuator drives valves, dampers and other regulating mechanisms by receiving control signals to achieve precise control of fluid parameters such as fluid flow and pressure. During operation, the motor drives the worm or screw through the reduction gear set, causing the output shaft to produce angular displacement or linear displacement. At the same time, the encoder provides real-time feedback of the position signal to form a closed-loop control.

[0003] In the existing technology, in order to ensure the stable operation of the electric actuator, a switching device is also assembled to enable the electric actuator to switch between motor-driven and manual-driven modes. The mainstream solution is generally to couple the motor power chain and the handwheel operation path through the same transmission shaft, and adopt a worm gear transmission structure between the two. In the electric mode, the clutch is linked to the motor, while in the manual mode, the clutch needs to be disconnected and the handwheel operation path is connected through a switching handle or other closed-circuit means to prevent cross-interference between the two drive ends.

[0004] However, because the motor power train and the handwheel operation path are coupled via the same drive shaft, during mode switching, the worm gear pair experiences an engagement angle error band due to accumulated geometric tolerances. When the actuator remains within this error range, the worm gear tooth surface and the worm gear tooth groove cannot be fully aligned, causing mechanical interference and excessive vibration. This not only accelerates wear on the clutch cam key and worm gear tooth surface, but also, because the motor power train is not fully isolated during manual operation, the reverse driving force generated by sudden changes in pipeline pressure can be transmitted back to the handwheel through the coupled drive shaft, causing the handwheel to reverse and injure personnel. Furthermore, the switching process relies on manual fine-tuning of the output shaft position to eliminate mechanical dead zones. Operational delays can delay emergency response, and frequent interventions further exacerbate component wear. Summary of the Invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a switching-free device for an electric actuator, aiming to solve the above technical problems.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A switch-free device for an electric actuator comprises an actuator outer shell, wherein a servo drive motor and a manual control wheel are fixedly mounted on the outer surface of the actuator outer shell and arranged oppositely, wherein the output end of the servo drive motor penetrates into the interior of the actuator outer shell, and a first worm is fixedly mounted on the penetration end, and the axial end of the manual control wheel also penetrates into the interior of the actuator outer shell, and a second worm is fixedly mounted on the penetration end, and a switch-free linkage mechanism is arranged at the internal axial center position of the actuator outer shell;

[0008] The switch-free linkage mechanism is in the shape of a convex character as a whole, and includes a third gear ring located on the upper side of the convex character structure, and a first gear ring located on the lower side of the convex character structure. The first gear ring and the third gear ring are independent of each other, and a central shaft rod serving as the output end of the electric actuator is further configured at the center position of the first gear ring and the third gear ring. The first gear ring and the third gear ring can independently drive the central shaft rod to rotate;

[0009] The first worm is meshed with the side of the third gear ring, and the second worm is meshed with the side of the first gear ring.

[0010] As a further solution of the present invention: the bottom of the actuator outer shell is fixedly installed with a base frame by bolts, and the base frame is also provided with a circular guide groove on the side facing the actuator outer shell, and a fitting chassis placed inside the actuator outer shell is movably installed through the circular guide groove, the upper surface of the fitting chassis is fixedly installed with a main drive shaft center disk, the central shaft is fixedly installed at the center position of the upper surface of the main drive shaft center disk, the interior of the main drive shaft center disk is a cavity structure, and four groups of planetary gear lubrication modules spaced 90 degrees apart are movably provided at the side edges of the upper surface of the main drive shaft center disk.

[0011] As a further solution of the present invention: a support ring is fixedly installed on the inner wall of the actuator outer shell, and the support ring is located on the upper side of the main drive shaft center disk. A first gear ring is movably installed on the upper side of the support ring, and a tooth opening is also provided on the inner ring of the first gear ring, and the tooth opening on the inner ring is engaged with four sets of planetary gear lubrication modules. The center of the base frame is open, and the side of the fitting chassis facing the opening of the base frame is provided with a ring connecting tooth as the output end.

[0012] As a further solution of the present invention: the switch-free linkage mechanism also includes a first separating ring disk movably sleeved on the upper side of the central shaft, the first separating ring disk as a whole covers the upper surface of the four groups of planetary gear lubrication modules, and the side of the first separating ring disk facing the planetary gear lubrication module is also fixedly installed with a second gear ring, the outer edge of the second gear ring is engaged with the four groups of planetary gear lubrication modules, and four groups of auxiliary planetary gears spaced 90 degrees apart are movably installed at the side edge of the upper surface of the first separating ring disk, and the outer edges of the auxiliary planetary gears are all engaged with the teeth on the inner ring of the first gear ring.

[0013] As a further solution of the present invention: the switch-free linkage mechanism also includes a second separating ring disk that is movably sleeved on the central shaft and located on the upper side of the first separating ring disk. The second separating ring disk is entirely covered on the upper surface of the auxiliary planetary gear, and a fourth gear ring is fixedly installed on the side of the second separating ring disk facing the auxiliary planetary gear. The outer edge of the fourth gear ring is meshed with four groups of auxiliary planetary gears, and the third gear ring is fixedly installed on the upper surface of the second separating ring disk. The upper side of the central shaft passes through the top of the actuator outer shell, and the top of the actuator outer shell is located at the position where the actuator outer shell passes through the end to be passed through to be provided with an encoder assembly module to assemble an encoder to detect the rotation state of the central shaft in real time.

[0014] As a further solution of the present invention: the planetary gear lubrication module as a whole includes two groups of solid planetary gears arranged oppositely, and two groups of hollow planetary gears arranged oppositely, and the hollow planetary gears include a cavity disc, and a plurality of gear blocks are fixedly connected to the outer edge of the cavity disc, and a cavity is opened on the top of each gear block, and an adsorption cotton block is arranged through the cavity, and the adsorption cotton blocks are all connected to a second conveying duct that penetrates the interior of the cavity disc.

[0015] As a further solution of the present invention: reserved notches are provided on the side of the cavity disc at the position between the two gear blocks, and a limiting bracket is fixedly installed on the inner ring side of the cavity disc at the position of each reserved notch, a top plate is fixedly installed on the outside of the limiting bracket, a trigger push plate is slidably installed on the limiting bracket, and a semicircular contact block is fixedly installed on the side of the trigger push plate facing the reserved notch.

[0016] As a further solution of the present invention: a reset spring rod is fixedly installed at the axial position of one side of the top plate facing the trigger push plate, and the reset end of the reset spring rod is fixedly connected to the trigger push plate, so that the trigger push plate is always tightly attached to the inner annular surface of the cavity disk under the action of the reset thrust, and when the trigger push plate is tightly attached to the inner annular surface of the cavity disk, the semicircular contact block protrudes outward through the reserved notch.

[0017] As a further solution of the present invention: a sealed cavity frame is fixedly installed at the inner center position of the cavity disc, a liquid storage cavity is fixedly installed at the inner center position of the sealed cavity frame, a reset airbag cavity sleeve is fixedly installed on the outer edge surface of the liquid storage cavity facing each reserved notch, and a one-way valve is provided at the intersection of the liquid storage cavity and the reset airbag cavity sleeve, the bottom of the reset airbag cavity sleeve is connected to a first delivery conduit passing through the sealed cavity frame, and the first delivery conduit is connected to the second delivery conduit on the adjacent adsorption cotton block.

[0018] As a further solution of the present invention: a cavity is opened inside the central shaft, and a storage tank is fixedly installed through the cavity, two third delivery ducts are installed in the inner cavity of the main drive shaft disk, the third delivery ducts penetrate into the interior of the central shaft and are connected to the bottom of the storage tank, and the ends of the third delivery ducts away from the storage tank are respectively connected to the liquid storage cavities at both ends of the main drive shaft disk to supply liquid to the liquid storage cavities, and two extension rods are fixedly installed on the surface of the trigger push plate, which penetrate into the interior of the sealed cavity frame and are fixedly connected to the opposite reset airbag cavity sleeve.

[0019] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects:

[0020] (1) This solution can solve the problem of reverse driving force transmission of the handwheel caused by the coupling of the transmission shaft in traditional electric actuators by designing a convex layered switching-free linkage mechanism and a double worm gear self-locking transmission system. The independent gear rings arranged in upper and lower layers are respectively engaged with the worm gear at the electric end and the worm gear at the manual end, and the inherent one-way transmission characteristics of the worm gear are used to achieve physical isolation of the power path. In the electric mode, the servo motor drives the upper gear ring to drive the planetary gear set to achieve power transmission. At this time, the lower gear ring remains stationary due to the worm gear self-locking effect, completely blocking the transmission path of the reverse torque to the handwheel end. During manual operation, the rotation of the lower gear ring is achieved through the coordination of the auxiliary planetary gear and the fixed upper structure to achieve power output. The worm gear self-locking is also based on avoiding interference with the motor end. Different from the traditional clutch switching structure, the switching-free operation is achieved through the physical decoupling of the transmission path, which not only eliminates the operational risk of manual adjustment of the dead zone, but also avoids the vibration wear problem caused by the coupled transmission.

[0021] (2) By arranging the hollow planetary gears and the solid gears at intervals and integrating a trigger lubrication mechanism inside the hollow gears, the periodic mechanical stress during the gear meshing process is used to drive the lubricant in the liquid storage chamber to be transported. When the semicircular contact block is retracted by the meshing pressure, the linkage push rod squeezes the reset airbag cavity and transports the lubricant in the storage tank to the adsorption cotton block, thereby achieving real-time lubrication of the meshing tooth surface. This not only solves the problem of difficult maintenance of the bottom gears in the traditional layered structure, but also optimizes the heat dissipation performance of the central shaft through the heat conduction of the lubricant. Combined with the real-time position feedback of the encoder, it ensures long-term operation stability in high-precision scenarios such as nuclear power valves.

[0022] (3) The overall structure achieves a balance between functional integration and safety redundancy through modular layering. The electric drive layer, manual operation layer and planetary transmission layer are stacked vertically on the central shaft. The support ring and the separation ring disk are used to build an independent transmission space. While ensuring the compactness of the structure, the power path is completely isolated. The encoder assembly module directly monitors the absolute position of the central shaft, and combined with the self-locking characteristics of the worm gear, it forms a double safety guarantee. The power path can be switched automatically without human intervention, which can significantly reduce the safety risks in emergency conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable one skilled in the art to make and use the invention;

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the structure inside the outer shell of the actuator of the present invention;

[0026] Figure 3 This is a structural diagram of the present invention's free-switch linkage mechanism in a split state;

[0027] Figure 4 This is a structural diagram of the integrated state of the non-switching linkage mechanism of the present invention;

[0028] Figure 5 This is a schematic structural diagram of the planetary gear lubrication module of the present invention;

[0029] Figure 6 This is a schematic diagram of the internal structure of the planetary gear lubrication module of the present invention;

[0030] Figure 7 Schematic diagram of the structure of the cavity disc of the present invention;

[0031] Figure 8 for Figure 7Schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 9 Schematic diagram of the structure of the liquid storage chamber of the present invention;

[0033] Figure 10 It is a structural schematic diagram of a half-section state of the central shaft of the present invention.

[0034] Reference numerals

[0035] 1. Actuator outer shell; 2. Servo drive motor; 3. First worm; 4. Manual control wheel; 5. Second worm;

[0036] 6. Switch-free linkage mechanism; 61. Fitted chassis; 62. Main drive shaft center plate; 63. Center shaft;

[0037] 64. Planetary gear lubrication module; 641. Cavity disc; 642. Gear block; 643. Adsorption cotton block; 644. Reserved notch; 645. Limit bracket; 646. Top plate; 647. Trigger push plate; 648. Return spring rod; 649. Semicircular contact block; 6410. Extension rod; 6411. Sealed cavity frame; 6412. Liquid storage chamber; 6413. Reset airbag cavity sleeve; 6414. First delivery catheter; 6415. Second delivery catheter.

[0038] 65. Support ring; 66. First gear ring; 67. First separating ring disk; 68. Second gear ring; 69. Auxiliary planetary gear; 610. Second separating ring disk; 611. Third gear ring; 612. Fourth gear ring; 613. Ring connecting teeth;

[0039] 7. Base frame; 8. Encoder assembly module; 9. Third delivery duct; 10. Storage tank.

[0040] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0041] The following describes in detail a switching-free device for an electric actuator provided by the present invention, with reference to the accompanying drawings and specific embodiments. It is also noted that, for the sake of completeness, the following embodiments are best and preferred embodiments, and those skilled in the art may employ alternative implementations. Furthermore, the accompanying drawings are intended only to further illustrate the embodiments and are not intended to limit the present invention.

[0042] like Figures 1 to 10 As shown, an embodiment of the present invention provides a switch-free device for an electric actuator, comprising an actuator outer shell 1, on the outer surface of which a servo drive motor 2 and a manual control wheel 4 are fixedly mounted and arranged relatively. The output end of the servo drive motor 2 penetrates into the interior of the actuator outer shell 1, and a first worm 3 is fixedly mounted on the penetration end. The axial end of the manual control wheel 4 also penetrates into the interior of the actuator outer shell 1, and a second worm 5 is fixedly mounted on the penetration end. A switch-free linkage mechanism 6 is arranged at the internal axial position of the actuator outer shell 1.

[0043] The switch-free linkage mechanism 6 is convex in shape as a whole, and includes a third gear ring 611 located on the upper side of the convex structure, and a first gear ring 66 located on the lower side of the convex structure. The first gear ring 66 and the third gear ring 611 are independent of each other, and a central shaft 63 serving as the output end of the electric actuator is further configured at the center of the first gear ring 66 and the third gear ring 611. The first gear ring 66 and the third gear ring 611 can independently drive the central shaft 63 to rotate.

[0044] The first worm 3 is meshed with the side of the third gear ring 611 , and the second worm 5 is meshed with the side of the first gear ring 66 .

[0045] In order to solve the safety hazard problem of the reverse driving force caused by the coupling of the transmission shaft in the manual-automatic switching device of the existing electric actuator being transmitted to the handwheel end, the above-mentioned technical solution is now adopted to solve the problem. The above-mentioned technical solution mainly consists of an actuator outer shell 1, a servo drive motor 2, a first worm 3, a manual control wheel 4, a second worm 5, and a non-switching linkage mechanism 6. The actuator outer shell 1 is the outer protective shell structure of the electric actuator in the prior art, and the servo drive motor 2 and the manual control wheel 4 are both arranged on the outer surface of the actuator outer shell 1 through a fixed component. The servo drive motor 2 is a structure capable of servo drive in the prior art, which is used to rotate the first worm 3 through the servo control of its output end. Similarly, the manual control wheel 4 is also a rotating structure for manual drive in the prior art, which is used to control the rotation of the second worm 5. The non-switching linkage mechanism 6, which is a switching structure inside the device, includes a first gear ring 66 and a third gear ring 611, as shown in the attached manual. Figure 2 , Instruction Manual Figure 3 , Instruction Manual Figure 4As shown, the switch-free linkage mechanism 6 is similar to a convex structure as a whole. The convex structure is set to distinguish the first worm 3 and the second worm 5 separately, so that the first worm 3 and the second worm 5 can act on the switch-free linkage mechanism 6 separately. The first worm 3 and the second worm 5 are similar to the worm structure in the prior art, and the first gear ring 66 and the third gear ring 611 are similar to the worm wheel structure in the prior art. It is well known that in the worm gear meshing transmission, the rotation of the worm can drive the rotation of the worm wheel, and the worm wheel cannot reversely drive the worm, and a self-locking characteristic can be achieved. Specifically, the lead angle of the worm is smaller than the equivalent friction angle between the meshing tooth surfaces. The friction resistance will completely offset the reverse driving force transmitted by the worm wheel, resulting in its helix angle unable to overcome the static friction between the meshing tooth surfaces. At this time, the reverse force of the worm wheel on the worm will form a self-locking effect at the contact point of the tooth surface, so that the worm remains stationary. Therefore, during operation, the servo drive motor 2 can drive the third gear ring 611 to rotate through the first worm 3, and the manual control wheel 4 can drive the first gear ring 66 to rotate through the second worm 5. On the contrary, the third gear ring 611 cannot drive the first worm 3 to rotate, and the first gear ring 66 cannot drive the second worm 5 to rotate, and both will be stuck, thereby ensuring that the two driving ends do not interfere with each other. On the other hand, the convex structure is set to be layered up and down, and through several gear sets between the upper and lower layers, combined with the reverse self-locking characteristics, the situation where the motor power chain and the handwheel operation path are coupled to the same transmission shaft is avoided, so as to solve the safety hazard problem of the reverse driving force of the existing electric actuator manual-automatic switching device being transmitted to the handwheel end due to the coupling of the transmission shaft.

[0046] like Figures 1 to 10 As shown, the bottom of the actuator outer shell 1 is fixed with a base sleeve frame 7 by bolts, and the side of the base sleeve frame 7 facing the actuator outer shell 1 is also provided with a circular guide groove, and a fitting chassis 61 placed inside the actuator outer shell 1 is movably installed through the circular guide groove, and the upper surface of the fitting chassis 61 is fixedly installed with a main drive shaft center disk 62, and the central shaft 63 is fixedly installed at the center position of the upper surface of the main drive shaft center disk 62. The interior of the main drive shaft center disk 62 is a cavity structure, and four groups of planetary gear lubrication modules 64 spaced 90 degrees apart are movably provided at the side of the upper surface of the main drive shaft center disk 62.

[0047] The configured sleeve chassis 61 , main drive shaft center plate 62 , and center shaft 63 are an integrated structure, and are movably mounted on the base sleeve frame 7 .

[0048] like Figures 1 to 10As shown, a support ring 65 is fixedly mounted on the inner wall of the actuator outer shell 1, and the support ring 65 is located on the upper side of the main drive shaft center disk 62. A first gear ring 66 is movably mounted on the upper side of the support ring 65. The inner ring of the first gear ring 66 is also provided with teeth, and is engaged with the four sets of planetary gear lubrication modules 64 through the teeth on the inner ring. The center of the base frame 7 is open, and the side of the fitting chassis 61 facing the opening of the base frame 7 is provided with a ring connecting tooth 613 as the output end.

[0049] Among them, the configured support ring 65 is an additional support member on the inner wall of the actuator outer shell 1, which is used to support the first gear ring 66. The first gear ring 66 is a gear structure with tooth openings on both the outer ring and the inner ring. The outer side is engaged with the second worm 5, and the inner side is engaged with the four sets of planetary gear lubrication modules 64. The side of the sleeve chassis 61 facing the opening of the base sleeve frame 7 is equipped with a ring connecting tooth 613 as the output end. The ring connecting tooth 613 can be configured with a corresponding meshing output end for mechanical control.

[0050] like Figures 1 to 10 As shown, the switch-free linkage mechanism 6 also includes a first separating annular disk 67 movably sleeved on the upper side of the central shaft 63, and the first separating annular disk 67 as a whole covers the upper surface of the four groups of planetary gear lubrication modules 64, and the side of the first separating annular disk 67 facing the planetary gear lubrication module 64 is also fixedly installed with a second gear ring 68, and the outer edge of the second gear ring 68 is engaged with the four groups of planetary gear lubrication modules 64, and four groups of auxiliary planetary gears 69 spaced 90 degrees apart are movably installed at the side edge of the upper surface of the first separating annular disk 67, and the outer edges of the auxiliary planetary gears 69 are all engaged with the teeth on the inner ring of the first gear ring 66.

[0051] like Figures 1 to 10 As shown, the switch-free linkage mechanism 6 also includes a second separating ring disk 610 that is movably sleeved on the central shaft 63 and located on the upper side of the first separating ring disk 67. The second separating ring disk 610 is entirely covered on the upper surface of the auxiliary planetary gear 69, and the second separating ring disk 610 is fixedly installed with a fourth gear ring 612 on the side facing the auxiliary planetary gear 69. The outer edge of the fourth gear ring 612 is engaged with the four groups of auxiliary planetary gears 69. The third gear ring 611 is fixedly installed on the upper surface of the second separating ring disk 610. The upper side of the central shaft 63 passes through the top of the actuator outer shell 1. The top of the actuator outer shell 1 is located at the position where the actuator outer shell 1 passes through the end to be passed through to be provided with an encoder assembly module 8 to assemble an encoder to detect the rotation state of the central shaft 63 in real time.

[0052] Among them, the encoder configured in the encoder assembly module 8 is used to detect the rotation state of the central shaft 63 at the output end. It is a feedback element in the prior art. It can directly measure the actual position of the output shaft and provide real-time feedback on the valve opening. For example, in nuclear power valves, the absolute encoder can achieve closed-loop control without cumulative error throughout the entire stroke.

[0053] The specific working states of the configured servo drive motor 2 output end and the manual wheel 4 output end are:

[0054] During electric control: turn on the servo drive motor 2, and control the first worm 3 at its output end through the servo drive motor 2, and use the first worm 3 to drive the meshing third gear ring 611 to rotate, and the third gear ring 611 and the fourth gear ring 612 are both fixedly mounted on the second separating ring disk 610, so the fourth gear ring 612 will rotate around the central shaft 63. During the rotation, since the manual control wheel 4 at the manual end does not rotate at this time, and the first gear ring 66 cannot reversely drive the second worm 5 to rotate, the first gear ring 66 is stuck by the second worm 5 during electric control, so the first gear ring 66 cannot rotate, and the fourth gear ring 612 is meshed with the outer auxiliary planetary gear 69, but the first gear ring 66 outside the auxiliary planetary gear 69 is not moving at this time, so in this state, the auxiliary planetary gear 69 on each side can only rotate on its own, and revolve around the inner wall of the first gear ring 66 during the rotation. The first separating ring disk 67 rotates inside the first gear ring 66, and the second gear ring 68 on the lower side of the first separating ring disk 67 is meshed with the outer planetary gear lubrication module 64. As mentioned above, the first gear ring 66 cannot rotate at this time, so the planetary gear lubrication module 64 can only rotate on its own, and synchronously drive the main drive shaft center disk 62 to rotate on the inner wall of the first gear ring 66, and finally drive the central shaft 63 of the main drive shaft center disk 62 to rotate, and cooperate with the encoder to perform servo work. At this time, the driving force of the electric end will not be transmitted to the first gear ring 66, and will not be reflected on the manual control wheel 4 end, and will not cause the manual control wheel 4 to generate reverse rotation force to injure people, and will not cause interference due to the reverse force acting on the manual control wheel 4. No additional adjustment structure or separate control structure is required for adjustment, and the automatic locking effect can be achieved. Even in the reciprocating power-off state, a series of interference will not be caused due to the control end not being adjusted in time, ensuring safe operation while saving worry.

[0055] During manual control: turn the manual control wheel 4, and the second worm 5 is driven to rotate by the manual control wheel 4, so that the second worm 5 drives the first gear ring 66 to rotate. Since the servo drive motor 2 is not working at this time, that is, the second separating ring disk 610 at the meshing end of the first worm 3 does not rotate as a whole and is in a stuck state, the four sets of auxiliary planetary gears 69 meshing on the outside of the fourth gear ring 612 will not rotate either. However, each auxiliary planetary gear 69 is movable and meshes with the first gear ring 66 on the outside. At this time, the first gear ring 66 is engaged with each auxiliary planetary gear 69 to form a temporarily integrated movable structure. Specifically, the first gear ring 66 will drive the first separating ring disk 67 to rotate as a whole around the outside of the fourth gear ring 612. Similarly, the planetary gear lubrication module 64 is meshed with the second gear ring 68 at the bottom of the first separating ring disk 67, and is also meshed with the first gear ring 6 6 is meshed with the inner side of the main drive shaft center disk 6, so the main drive shaft center disk 62 also forms a temporary integrated structure with the first separating ring disk 67 at this time, and rotates along with the rotation of the first gear ring 66. Finally, it is manifested as the first gear ring 66 is rotated by manual control, and cooperates with the main drive shaft center disk 62 and the first separating ring disk 67 to rotate around the fourth gear ring 612, thereby achieving the effect of controlling the rotation of the central shaft rod 63 at the axis position of the main drive shaft center disk 62. Like the electric control, it finally drives the central shaft rod 63 of the axis of the main drive shaft center disk 62 to rotate, and cooperates with the encoder to perform servo work. At this time, the driving force of the manual end will not be transmitted to the fourth gear ring 612, nor will it be reflected on the servo drive motor 2 end, nor will it interfere with the electric end. Even in the reciprocating power-off state, it will not cause a series of interferences due to the failure of the control end to adjust in place in time, nor will it cause errors due to switching between gear groups.

[0056] like Figures 1 to 10 As shown, the planetary gear lubrication module 64 as a whole includes two groups of solid planetary gears arranged oppositely, and two groups of hollow planetary gears arranged oppositely, and the hollow planetary gears include a cavity disc 641, and a plurality of gear blocks 642 are fixedly connected to the outer edge of the cavity disc 641, and a cavity is opened on the top of each gear block 642, and an adsorption cotton block 643 is arranged through the cavity, and the adsorption cotton blocks 643 are connected to the second delivery duct 6415 that penetrates into the interior of the cavity disc 641.

[0057] Among them, the configured planetary gear lubrication module 64 as a whole includes two groups of solid planetary gears arranged oppositely, and two groups of hollow planetary gears arranged oppositely, and the two groups of hollow planetary gears arranged oppositely can be lubricated during the rotation and revolution. Because as described in the above structure, its switch-free linkage mechanism 6 as a whole is a two-layer structure, and the gear group requires daily lubrication and maintenance during operation. It is under the influence of the isolation layer, that is, under the isolation of the first separating ring disk 67, it is difficult to maintain the lower gear group. Therefore, a self-lubricating structure is set during the rotation process to assist the continuous and stable operation of the self-locking structure. The configured adsorption cotton block 643 is a capillary cotton block structure that can adsorb liquid in the prior art.

[0058] like Figures 1 to 10 As shown, a reserved slot 644 is provided on the side of the cavity disc 641 at a position between the two gear blocks 642, and a limiting bracket 645 is fixedly installed on the inner ring side of the cavity disc 641 at the position of each reserved slot 644, a top plate 646 is fixedly installed on the outer side of the limiting bracket 645, a trigger push plate 647 is slidably installed on the limiting bracket 645, and a semicircular contact block 649 is fixedly installed on the side of the trigger push plate 647 facing the reserved slot 644.

[0059] like Figures 1 to 10 As shown, a reset spring rod 648 is fixedly installed at the axial position of one side of the top plate 646 facing the trigger push plate 647. The reset end of the reset spring rod 648 is fixedly connected to the trigger push plate 647, so that the trigger push plate 647 is always tightly attached to the inner annular surface of the cavity disk 641 under the action of the reset thrust. When the trigger push plate 647 is tightly attached to the inner annular surface of the cavity disk 641, the semicircular contact block 649 is engaged and protruded outward through the reserved notch 644.

[0060] like Figures 1 to 10 As shown, a sealed cavity frame 6411 is fixedly installed at the inner center position of the cavity disc 641, a liquid storage cavity 6412 is fixedly installed at the inner center position of the sealed cavity frame 6411, and a reset airbag cavity sleeve 6413 is fixedly installed on the outer edge surface of the liquid storage cavity 6412 facing each reserved notch 644, and a one-way valve is provided at the intersection of the liquid storage cavity 6412 and the reset airbag cavity sleeve 6413, and the bottom of the reset airbag cavity sleeve 6413 is connected to a first delivery conduit 6414 passing through the sealed cavity frame 6411, and the first delivery conduit 6414 is connected to the second delivery conduit 6415 on the adjacent adsorption cotton block 643.

[0061] Among them, the one-way valve arranged at the intersection of the liquid storage chamber 6412 and the reset airbag cavity sleeve 6413 can only allow the liquid in the liquid storage chamber 6412 to enter the reset airbag cavity sleeve 6413, and the opening state of the valve can also be electrically controlled. When lubrication is not required, the valve can be electrically controlled to close. After the liquid in the reset airbag cavity sleeve 6413 is squeezed out each time, it can automatically flow into the reset airbag cavity sleeve 6413 to replenish it.

[0062] like Figures 1 to 10 As shown, a cavity is opened inside the central shaft 63, and a storage tank 10 is fixedly installed through the cavity, and two third delivery conduits 9 are installed in the inner cavity of the main drive shaft center disk 62, and the third delivery conduits 9 penetrate into the interior of the central shaft 63 and are connected to the bottom of the storage tank 10, and the ends of the third delivery conduits 9 away from the storage tank 10 are respectively connected to the liquid storage cavities 6412 at both ends of the main drive shaft center disk 62 to supply liquid to the liquid storage cavities 6412, and two extension rods 6410 are fixedly installed on the surface of the trigger push plate 647, which penetrate into the interior of the sealing cavity frame 6411 and are fixedly connected to the reset airbag cavity sleeve 6413 opposite to it.

[0063] The specific working principle of the cavity disc 641 configured in the planetary gear lubrication module 64 system is as follows:

[0064] The storage tank 10 is set in the cavity of the central shaft 63, and its injection port is exposed on the outside of the central shaft 63, which can be replenished in real time, facilitating the daily maintenance of the entire system. Every time the chassis 61 is fitted and rotated, the outer side is engaged with the inner side of the first gear ring 66, or with the outer side of the second gear ring 68, and the semicircular contact block 649 set between the gear blocks 642 will be reciprocally squeezed into the inner side of the cavity disk 641. During the squeezing process, the trigger push plate 647 will reversely squeeze the reset spring rod 648, causing the reset spring rod 648 to shrink, resulting in the trigger. The push plate 647 moves toward the center of the cavity disk 641, so that the extension rod 6410 on the surface of the trigger push plate 647 pushes the reset airbag cavity sleeve 6413, and the lubricating agent in the reset airbag cavity sleeve 6413 is squeezed out through the first delivery conduit 6414, and then transported to the adsorption cotton block 643 through the second delivery conduit 6415, so that the adsorption cotton block 643 is soaked as a whole, and the soaked adsorption cotton block 643 is used to reciprocate and fit the second gear ring 68 and the first gear ring 66 that are meshed on the outside to lubricate them, so that the entire bottom of the switch-free linkage mechanism 6 is automatically lubricated.

[0065] When the semicircular contact block 649 is not under force, it can be pushed out by the return spring rod 648 on the top plate 646 to wait for subsequent squeezing. On the other hand, the lubricating reagent is stored in the central shaft 63. On the one hand, it can not only serve as a second storage end to replenish the reagent to the liquid storage chamber 6412 on both sides, but also improve the heat dissipation effect of the external detection end of the central shaft 63. During the preparation process, the position in the cavity inside the central shaft 63 that contacts the storage tank 10 can be set as a heat-conducting structure, thereby further improving the stability of the central shaft 63 at the output end of the encoder assembly module 8 during operation.

[0066] The present invention encompasses any alternatives, modifications, equivalents, and solutions that fall within the spirit and scope of the present invention. To provide a thorough understanding of the present invention, specific details are described in detail below in connection with the preferred embodiments of the present invention, but those skilled in the art will be able to fully understand the present invention without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of the present invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0067] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A switching-free device for an electric actuator, comprising an actuator outer shell, on the outer surface of which a servo drive motor and a manual control wheel are fixedly mounted and arranged in opposite directions, characterized in that: The output end of the servo drive motor penetrates into the interior of the actuator outer shell, and a first worm is fixedly installed on the penetration end. The axial end of the manual control wheel also penetrates into the interior of the actuator outer shell, and a second worm is fixedly installed on the penetration end. A switching-free linkage mechanism is configured at the internal axial position of the actuator outer shell; The switch-free linkage mechanism is in the shape of a convex character as a whole, and includes a third gear ring located on the upper side of the convex character structure, and a first gear ring located on the lower side of the convex character structure. The first gear ring and the third gear ring are independent of each other, and a central shaft rod serving as the output end of the electric actuator is further configured at the center position of the first gear ring and the third gear ring. The first gear ring and the third gear ring can independently drive the central shaft rod to rotate; wherein the first worm is meshed with the side of the third gear ring, and the second worm is meshed with the side of the first gear ring; The bottom of the actuator outer shell is fixedly installed with a base sleeve frame by bolts, and the base sleeve is further provided with a circular guide groove on the side facing the actuator outer shell, and a fitting chassis placed inside the actuator outer shell is movably installed through the circular guide groove, and a main drive shaft disk is fixedly installed on the upper surface of the fitting chassis, and the central shaft is fixedly installed at the center position of the upper surface of the main drive shaft disk. The interior of the main drive shaft disk is a cavity structure, and four groups of planetary gear lubrication modules spaced 90 degrees apart are movably provided at the side edges of the upper surface of the main drive shaft disk; The planetary gear lubrication module as a whole includes two sets of solid planetary gears arranged oppositely, and two sets of hollow planetary gears arranged oppositely, and the hollow planetary gears include a cavity disk, and a plurality of gear blocks are fixedly connected to the outer edge of the cavity disk, and each gear block has a cavity on the top, and an adsorption cotton block is arranged through the cavity, and the adsorption cotton blocks are all connected to a second delivery duct that penetrates the interior of the cavity disk; A reserved notch is provided on the side of the cavity disc at a position between the two gear blocks, and a limit bracket is fixedly installed on the inner ring side of the cavity disc at the position of each reserved notch, a top plate is fixedly installed on the outer side of the limit bracket, a trigger push plate is slidably installed on the limit bracket, and a semicircular contact block is fixedly installed on the side of the trigger push plate facing the reserved notch.

2. The switching-free device for an electric actuator according to claim 1, characterized in that: A support ring is fixedly mounted on the inner wall of the actuator outer shell, and the support ring is located on the upper side of the main drive shaft center disk. A first gear ring is movably mounted on the upper side of the support ring, and a tooth opening is also provided on the inner ring of the first gear ring, and the tooth opening on the inner ring is engaged with four sets of planetary gear lubrication modules. The center of the base frame is open, and the side of the fitting chassis facing the opening of the base frame is provided with a ring connecting tooth as the output end.

3. The switching-free device for an electric actuator according to claim 2, characterized in that: The switch-free linkage mechanism also includes a first separating ring disk movably sleeved on the upper side of the central shaft, the first separating ring disk as a whole covers the upper surface of the four sets of planetary gear lubrication modules, and a second gear ring is fixedly installed on the side of the first separating ring disk facing the planetary gear lubrication module, the outer edge of the second gear ring is engaged with the four sets of planetary gear lubrication modules, and four sets of auxiliary planetary gears spaced 90 degrees apart are movably installed at the side edge of the upper surface of the first separating ring disk, and the outer edges of the auxiliary planetary gears are all engaged in the tooth openings on the inner ring of the first gear ring.

4. The switching-free device for an electric actuator according to claim 3, characterized in that: The switch-free linkage mechanism also includes a second separating ring disk that is movably sleeved on the central shaft and located on the upper side of the first separating ring disk. The second separating ring disk as a whole covers the upper surface of the auxiliary planetary gear, and a fourth gear ring is fixedly installed on the side of the second separating ring disk facing the auxiliary planetary gear. The outer edge of the fourth gear ring is meshed with four groups of auxiliary planetary gears. The third gear ring is fixedly installed on the upper surface of the second separating ring disk. The upper side of the central shaft passes through the top of the actuator outer shell. The top of the actuator outer shell is located at the position where the actuator outer shell passes through the end to be passed through to be provided with an encoder assembly module to assemble an encoder to detect the rotation state of the central shaft in real time.

5. The switching-free device for an electric actuator according to claim 4, characterized in that: A reset spring rod is fixedly installed at the axial position of one side of the top plate facing the trigger push plate, and the reset end of the reset spring rod is fixedly connected to the trigger push plate so that the trigger push plate is always tightly attached to the inner annular surface of the cavity disk under the action of the reset thrust, and when the trigger push plate is tightly attached to the inner annular surface of the cavity disk, the semicircular contact block protrudes outward through the reserved notch.

6. The switching-free device for an electric actuator according to claim 5, characterized in that: A sealed cavity frame is fixedly installed at the inner center position of the cavity disc, a liquid storage cavity is fixedly installed at the inner center position of the sealed cavity frame, a reset airbag cavity sleeve is fixedly installed at the position facing each reserved notch on the outer edge surface of the liquid storage cavity, and a one-way valve is provided at the intersection of the liquid storage cavity and the reset airbag cavity sleeve, and the bottom of the reset airbag cavity sleeve is connected to a first delivery conduit passing through the sealed cavity frame, and the first delivery conduit is connected to the second delivery conduit on the adjacent adsorption cotton block.

7. The switching-free device for an electric actuator according to claim 6, characterized in that: A cavity is provided inside the central shaft, and a storage tank is fixedly installed through the cavity; two third delivery ducts are installed in the inner cavity of the main drive shaft disk, and the third delivery ducts penetrate into the interior of the central shaft and communicate with the bottom of the storage tank; one end of the third delivery duct away from the storage tank is respectively communicated with the liquid storage cavities at both ends of the main drive shaft disk to supply liquid to the liquid storage cavities; two extension rods are fixedly installed on the surface of the trigger push plate, which penetrate into the interior of the sealed cavity frame and are fixedly connected to the opposite reset airbag cavity sleeve.

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