Switching-free device of electric actuator

Abstract

The invention discloses a switching-free device of an electric actuator, and belongs to the technical field of switching valves of electric actuators. Comprising an actuator outer sleeve shell, a servo driving motor and a manual control rotating wheel, the output end of the servo driving motor penetrates into the actuator outer sleeve shell, a first worm is fixedly installed at the penetrating end, the axis end of the manual control rotating wheel also penetrates into the actuator outer sleeve shell, a second worm is fixedly installed at the penetrating end, and the second worm is fixedly installed at the axis end of the manual control rotating wheel. A switching-free linkage mechanism is arranged at the axis position in the actuator outer sleeve shell, and through the design of the inverted-T-shaped layered switching-free linkage mechanism and a double-worm-gear self-locking transmission system, the problem of reverse driving force transmission of a hand wheel, caused by coupling of transmission shafts, of a traditional electric actuator can be solved; the independent gear rings arranged in an up-and-down layered mode are utilized, physical isolation of a power path is achieved, the operation risk of manual adjustment of a dead zone is eliminated, and the problem of vibration abrasion caused by coupling transmission is solved.

Description

Technical Field

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

[0002] As the core actuator unit of an industrial automation system, an electric actuator drives regulating mechanisms such as valves and dampers by receiving control signals to achieve precise control of parameters such as fluid flow rate and pressure. During operation, the motor drives a worm or a lead screw through a reduction gear set, driving the output shaft to generate an angular displacement or a linear displacement. Meanwhile, the encoder real-time feedbacks the position signal to form a closed-loop control.

[0003] In the prior art, in order to ensure the stable operation of the electric actuator, a switching device is also assembled, enabling the electric actuator to switch between two modes: motor drive and manual drive. The mainstream solution generally couples the motor power chain and the handwheel operation path through the same transmission shaft, and a worm and worm gear transmission structure is adopted between them. In the electric mode, it is linked with the motor through a clutch, while in the manual mode, it is necessary to disconnect the clutch and connect the handwheel operation path through a switching handle or other closed-loop means to prevent cross-interference between the two drive ends.

[0004] However, since the motor power chain and the handwheel operation path are coupled through the same transmission shaft, during the mode switching process, the meshing angle error band formed by the geometric tolerance accumulation of the worm and worm gear pair. When the actuator stops within this error range, the worm gear tooth surface and the worm tooth groove cannot be completely aligned, causing mechanical interference and generating excessive vibration. This not only accelerates the wear of the clutch cam key and the worm tooth surface, but also because the motor power chain is not completely isolated during manual operation, the reverse driving force generated by the sudden change of the pipeline pressure will be reversely transmitted to the handwheel through the coupled transmission shaft, resulting in the handwheel rotating backwards and hurting people. At the same time, the switching process relies on manual fine-tuning of the output shaft position to eliminate the mechanical dead zone. The operation delay will delay the response to emergency conditions, and frequent intervention further exacerbates the component loss. Summary of the Invention

[0005] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a non-switching 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 non-switching device for an electric actuator, comprising an actuator outer casing, on the outer surface of which a servo drive motor and a manual control wheel are fixedly installed in a relatively arranged manner. The output end of the servo drive motor penetrates into the interior of the actuator outer casing, and a first worm is fixedly installed on the penetrating end. The axial center end of the manual control wheel also penetrates into the interior of the actuator outer casing, and a second worm is fixedly installed on the penetrating end. A non-switching linkage mechanism is arranged at the axial center position inside the actuator outer casing; The non-switching linkage mechanism is integrally in a convex shape, including a third gear ring located on the upper side of the convex-shaped structure and a first gear ring located on the lower side of the convex-shaped 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 also arranged at the center position of the first gear ring and the third gear ring. Both the first gear ring and the third gear ring can drive the central shaft rod to rotate independently; Among them, the first worm meshes with the side of the third gear ring, and the second worm meshes with the side of the first gear ring.

[0008] As a further scheme of the present invention: the bottom of the actuator outer casing is fixedly installed with a base sleeve frame through bolts, and a circular ring guide groove is also arranged on the side of the base sleeve frame facing the actuator outer casing, and a fitting chassis placed inside the actuator outer casing is movably installed through the circular ring guide groove. The upper surface of the fitting chassis is fixedly installed with a main drive central disk, and the central shaft rod is fixedly installed at the center position of the upper surface of the main drive central disk. The interior of the main drive central disk is a cavity structure, and four planetary gear lubrication modules are sequentially arranged at intervals of 90 degrees on the side of the upper surface of the main drive central disk.

[0009] As a further scheme of the present invention: a support retaining ring is fixedly installed on the inner wall of the actuator outer casing, the support retaining ring is located above the main drive central disk, the first gear ring is movably installed above the support retaining ring, and tooth openings are also arranged on the inner ring of the first gear ring and mesh with the four planetary gear lubrication modules through the tooth openings on the inner ring. The center of the base sleeve frame is in an open shape, and a circular ring connecting tooth serving as the output end is arranged on the side of the fitting chassis facing the open shape of the base sleeve frame.

[0010] As a further solution of the present invention: The non-switching linkage mechanism further includes a first partition ring disk movably sleeved on the upper side of the central shaft rod. The first partition ring disk entirely covers the upper surface of the four planetary gear lubrication modules. And on the side of the first partition ring disk facing the planetary gear lubrication modules, a second gear ring is fixedly installed. The outer side of the second gear ring meshes with the four planetary gear lubrication modules. At the side position of the upper surface of the first partition ring disk, four auxiliary planetary gears are movably installed at intervals of 90 degrees in sequence. The outer sides of the auxiliary planetary gears are all meshed in the tooth openings on the inner ring of the first gear ring.

[0011] As a further solution of the present invention: The non-switching linkage mechanism further includes a second partition ring disk movably sleeved on the central shaft rod and located above the first partition ring disk. The second partition ring disk entirely covers the upper surface of the auxiliary planetary gears. And on the side of the second partition ring disk facing the auxiliary planetary gears, a fourth gear ring is fixedly installed. The outer side of the fourth gear ring meshes with the four auxiliary planetary gears. A third gear ring is fixedly installed on the upper surface of the second partition ring disk. The upper side of the central shaft rod penetrates through the top of the actuator outer shell. At the position of the top of the actuator outer shell where it penetrates out, an encoder assembly module is configured to assemble an encoder to detect the rotation state of the central shaft rod in real time.

[0012] As a further solution of the present invention: The planetary gear lubrication module as a whole includes two relatively arranged solid planetary gears and two relatively arranged hollow planetary gears. And the hollow planetary gear includes a cavity disk. On the outer side of the cavity disk, a number of gear blocks are fixedly connected. And at the top of each gear block, a cavity is provided, and an adsorption cotton block is arranged through the cavity. The adsorption cotton blocks are all connected in communication with a second conveying conduit penetrating into the cavity disk.

[0013] As a further solution of the present invention: At the position between two gear blocks on the side of the cavity disk, reserved notches are provided. And at the position of the inner ring side of the cavity disk corresponding to each reserved notch, a limiting bracket is fixedly installed. On the outer side of the limiting bracket, a top plate is fixedly installed. A trigger push plate is slidably installed on the limiting bracket. On the side of the trigger push plate facing the reserved notch, a semi-circular contact block is fixedly installed.

[0014] As a further solution of the present invention: At the central position on the side of the top plate facing the trigger push plate, a reset spring rod is fixedly installed. The reset end of the reset spring rod is fixedly connected to the trigger push plate, so that the trigger push plate is always closely attached to the inner ring surface of the cavity disk under the action of the reset thrust. When the trigger push plate is closely attached to the inner ring surface of the cavity disk, the semi-circular contact block protrudes outward through the reserved notch.

[0015] As a further solution of the present invention: a sealed cavity frame is fixedly installed at the center position inside the cavity disc, a liquid storage cavity is fixedly installed at the center position inside the sealed cavity frame, a reset airbag cavity sleeve is fixedly installed at the position of the outer edge surface of the liquid storage cavity facing each reserved notch, and a one-way valve is arranged at the position where the liquid storage cavity and the reset airbag cavity sleeve are connected. The bottom of the reset airbag cavity sleeve is connected with a first delivery conduit passing through the sealed cavity frame, and the first delivery conduit is connected with a second delivery conduit on the adjacent absorbent cotton block.

[0016] As a further solution of the present invention: a cavity is provided inside the central shaft rod, and a storage tank is fixedly installed through the cavity. Two third delivery conduits are installed in the inner cavity of the main drive central disc. The third delivery conduits penetrate into the inside of the central shaft rod and are connected to the bottom of the storage tank in a communicating manner. The ends of the third delivery conduits away from the storage tank are respectively connected to the liquid storage cavities at both ends of the main drive central disc to supply liquid to the liquid storage cavities. Two extension rods are fixedly installed on the surface of the trigger push plate and penetrate into the inside of the sealed cavity frame and are fixedly connected to the reset airbag cavity sleeves facing them.

[0017] Compared with the prior art, the above technical solution provided by the present invention has at least the following beneficial effects: (1) Through the design of the convex-shaped hierarchical non-switching linkage mechanism and the double worm and worm gear self-locking transmission system, this solution can solve the problem of reverse driving force transmission of the handwheel caused by the coupling of the transmission shaft in the traditional electric actuator. By using the independent gear rings arranged in upper and lower layers, they are respectively meshed with the electric end worm and the manual end worm, and the physical isolation of the power path is realized by using the inherent one-way transmission characteristic of the worm and worm gear. In the electric mode, the servo motor drives the upper layer gear ring to drive the planetary gear set to achieve power transmission. At this time, the lower layer gear ring remains stationary through the worm self-locking effect, completely blocking the transmission path of the reverse torque to the handwheel end. During manual operation, the rotation of the lower layer gear ring realizes power output through the cooperation of the auxiliary planetary gear and the fixed upper structure. Similarly, based on the worm self-locking, interference with the motor end is avoided. Different from the traditional clutch switching structure, the non-switching operation is realized through the physical decoupling of the transmission path, which not only eliminates the operation risk of the manual adjustment dead zone but also avoids the vibration and wear problems caused by the coupled transmission.

[0018] (2) By arranging the hollow planetary gears and the solid gears at intervals and integrating a trigger-type lubrication mechanism inside the hollow gears, the lubricant in the liquid storage cavity is driven by the periodic mechanical stress during the gear meshing process. When the semi-circular contact block retracts under the meshing pressure, the linkage push rod squeezes the reset airbag cavity, and the lubricant in the storage tank is conveyed to the adsorption cotton block, realizing the real-time lubrication of the meshing tooth surfaces. This not only solves the problem of difficult maintenance of the bottom-layer gears in the traditional layered structure but also optimizes the heat dissipation performance of the central shaft rod through the heat conduction of the lubricant. Combined with the real-time position feedback of the encoder, the long-term operation stability in high-precision scenarios such as nuclear power valves is ensured.

[0019] (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 vertically stacked on the central shaft rod, and independent transmission spaces are constructed using support rings and partition rings. While ensuring the structural compactness, complete isolation of the power path is achieved. The encoder assembly module directly monitors the absolute position of the central shaft rod, and combined with the self-locking characteristics of the worm and worm gear, a double safety guarantee is formed. The power path can be automatically switched without manual intervention, which can significantly reduce the safety risks in emergency situations. Brief Description of the Drawings

[0020] The accompanying drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention; Figure 1 Schematic diagram of the overall structure of the present invention; Figure 2 Schematic diagram of the structure inside the actuator outer housing of the present invention; Figure 3 Schematic diagram of the disassembled state of the non-switching linkage mechanism of the present invention; Figure 4 Schematic diagram of the integrated state of the non-switching linkage mechanism of the present invention; Figure 5 Schematic diagram of the planetary gear lubrication module of the present invention; Figure 6 Schematic diagram of the structure inside the planetary gear lubrication module of the present invention; Figure 7 Schematic diagram of the cavity disc of the present invention; Figure 8 is Figure 7 The enlarged structural schematic diagram at A in Figure 9 Schematic diagram of the liquid storage cavity of the present invention; Figure 10 Schematic diagram of the semi-sectional state of the central shaft rod of the present invention.

[0021] Reference numerals 1. Outer housing of actuator; 2. Servo drive motor; 3. First worm; 4. Manual control wheel; 5. Second worm; 6. Non-switching linkage mechanism; 61. Fitting chassis; 62. Main drive axle disc; 63. Central shaft rod; 64. Planetary gear lubrication module; 641. Cavity disc; 642. Gear block; 643. Absorbent cotton block; 644. Reserved notch; 645. Limit bracket; 646. Top plate; 647. Trigger push plate; 648. Reset spring rod; 649. Semi-circular contact block; 6410. Extension rod; 6411. Sealed cavity frame; 6412. Liquid storage cavity; 6413. Reset airbag cavity sleeve; 6414. First delivery conduit; 6415. Second delivery conduit; 65. Support collar; 66. First gear ring; 67. First partition ring disc; 68. Second gear ring; 69. Auxiliary planetary gear; 610. Second partition ring disc; 611. Third gear ring; 612. Fourth gear ring; 613. Ring connecting teeth; 7. Base sleeve frame; 8. Encoder assembly module; 9. Third delivery conduit; 10. Storage tank.

[0022] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. Those of ordinary skill in the art can adjust or modify these devices and environments according to specific needs. Detailed implementation manners

[0023] The following will describe in detail a non-switching device for an electric actuator provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art in some well-known technical fields can also implement them in other alternative ways; moreover, the accompanying drawings are only for more specifically describing the embodiments and are not intended to specifically limit the present invention.

[0024] As Figures 1 to 10 shown, an embodiment of the present invention provides a non-switching device for an electric actuator, including an outer housing 1 of the actuator. On the outer surface of the outer housing 1 of the actuator, a servo drive motor 2 and a manual control wheel 4 arranged oppositely are fixedly installed. The output end of the servo drive motor 2 penetrates into the interior of the outer housing 1 of the actuator, and a first worm 3 is fixedly installed on the penetrating end. The axial center end of the manual control wheel 4 also penetrates into the interior of the outer housing 1 of the actuator, and a second worm 5 is fixedly installed on the penetrating end. A non-switching linkage mechanism 6 is arranged at the axial center position inside the outer housing 1 of the actuator; The non-switching linkage mechanism 6 is integrally convex-shaped, including a third gear ring 611 located on the upper side of the convex-shaped structure and a first gear ring 66 located on the lower side of the convex-shaped structure. The first gear ring 66 and the third gear ring 611 are independent of each other, and a central shaft rod 63 serving as the output end of the electric actuator is arranged at the center positions of the first gear ring 66 and the third gear ring 611. Both the first gear ring 66 and the third gear ring 611 can independently drive the central shaft rod 63 to rotate; Among them, the first worm 3 meshes with the side of the third gear ring 611, and the second worm 5 meshes with the side of the first gear ring 66.

[0025] To solve the problem of the safety hazard that the reverse driving force caused by the coupling of the transmission shaft is transmitted to the handwheel end in the existing electric actuator's manual-automatic switching device, the above technical solution is now adopted to solve it. The above 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 both the servo drive motor 2 and the manual control wheel 4 are arranged on the outer surface of the actuator outer shell 1 through fixing components. Among them, the servo drive motor 2 is a structure capable of servo drive in the prior art, and 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 rotational structure for manual control drive in the prior art, and is used to control the rotation of the second worm 5. And the non-switching linkage mechanism 6, which is the internal switching structure of the device, includes a first gear ring 66 and a third gear ring 611, as shown in the attached Figure 2 of the specification, Figure 3 of the specification, Figure 4As shown, the non-switching linkage mechanism 6 as a whole is similar to a convex-shaped structure. Setting it as a convex-shaped structure is for separating the first worm 3 and the second worm 5 individually, so that both the first worm 3 and the second worm 5 can act on the non-switching linkage mechanism 6 separately. The first worm 3 and the second worm 5 are similar to the worm structures in the prior art, while the first gear ring 66 and the third gear ring 611 are similar to the worm gear structures in the prior art. As is well known, in the meshing transmission of a worm and a worm gear, the rotation of the worm can drive the rotation of the worm gear, while the worm gear cannot drive the worm in the reverse direction, achieving a self-locking characteristic. Specifically, it lies in that the lead angle of the worm is less than the equivalent friction angle between the meshing tooth surfaces, and the frictional resistance will completely offset the reverse driving force transmitted by the worm gear, resulting in its helix angle being unable to overcome the static friction force between the meshing tooth surfaces. At this time, the reverse acting force of the worm gear on the worm will form a self-locking effect at the tooth surface contact, keeping the worm stationary. Therefore, during the working process, the servo drive motor 2 can drive the third gear ring 611 to rotate through the first worm 3, and the manual control rotating 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. Thus, it is ensured that the two driving ends do not interfere with each other. On the other hand, setting it as a convex-shaped structure is for upper and lower stratification. Through several gear sets between the upper and lower stratifications, combined with the reverse self-locking characteristic, it avoids the situation where the motor power chain and the handwheel operation path are coupled on the same transmission shaft, so as to solve the problem of the safety hazard of the reverse driving force being transmitted to the handwheel end due to the transmission shaft coupling in the existing electric actuator's manual-automatic switching device.

[0026] As Figures 1 to 10 shown, a base sleeve frame 7 is fixedly installed at the bottom of the actuator outer shell 1 through bolts, and a circular ring guide groove is further configured on the side of the base sleeve frame 7 facing the actuator outer shell 1, and a fitting chassis 61 placed inside the actuator outer shell 1 is movably installed through the circular ring guide groove. The upper surface of the fitting chassis 61 is fixedly installed with a main drive center disk 62. The central shaft rod 63 is fixedly installed at the center position of the upper surface of the main drive center disk 62. The inside of the main drive center disk 62 is a cavity structure, and four groups of planetary gear lubrication modules 64 that are sequentially separated by 90 degrees are movably configured at the side position of the upper surface of the main drive center disk 62.

[0027] Among them, the configured fitting chassis 61, main drive center disk 62, and central shaft rod 63 are an integral structure and are integrally movably installed on the base sleeve frame 7.

[0028] As Figures 1 to 10As shown, a support retaining ring 65 is fixedly installed on the inner wall of the actuator outer housing 1. The support retaining ring 65 is located above the main drive central axis disc 62. A first gear ring 66 is movably installed above the support retaining ring 65. The inner ring of the first gear ring 66 is also provided with tooth openings, and meshes with four planetary gear lubrication modules 64 through the tooth openings on the inner ring. The center of the base sleeve frame 7 is in an open shape. The fitting chassis 61 is provided with a ring connection tooth 613 as an output end on the side facing the open shape of the base sleeve frame 7.

[0029] Among them, the configured support retaining ring 65 is an additional support on the inner wall of the actuator outer housing 1 for supporting 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 meshes with the second worm 5, and the inner side meshes with four planetary gear lubrication modules 64. The fitting chassis 61 is provided with a ring connection tooth 613 as an output end on the side facing the open shape of the base sleeve frame 7. The ring connection tooth 613 can be configured with a corresponding meshing output end for mechanical control.

[0030] As Figures 1 to 10 shown, the non-switching linkage mechanism 6 further includes a first partition ring disc 67 movably sleeved on the upper side of the central shaft rod 63. The first partition ring disc 67 entirely covers the upper surface of the four planetary gear lubrication modules 64. And a second gear ring 68 is fixedly installed on the side of the first partition ring disc 67 facing the planetary gear lubrication modules 64. The outer side of the second gear ring 68 meshes with the four planetary gear lubrication modules 64. Four auxiliary planetary gears 69 are movably installed at the side position of the upper surface of the first partition ring disc 67 at intervals of 90 degrees in sequence. The outer sides of the auxiliary planetary gears 69 are all meshed in the tooth openings on the inner ring of the first gear ring 66.

[0031] As Figures 1 to 10 shown, the non-switching linkage mechanism 6 further includes a second partition ring disc 610 movably sleeved on the central shaft rod 63 and located above the first partition ring disc 67. The second partition ring disc 610 entirely covers the upper surface of the auxiliary planetary gears 69. And a fourth gear ring 612 is fixedly installed on the side of the second partition ring disc 610 facing the auxiliary planetary gears 69. The outer side of the fourth gear ring 612 meshes with the four auxiliary planetary gears 69. A third gear ring 611 is fixedly installed on the upper surface of the second partition ring disc 610. The upper side of the central shaft rod 63 penetrates through the top of the actuator outer housing 1. An encoder assembly module 8 is configured at the position of the top of the actuator outer housing 1 where the actuator outer housing 1 penetrates out to assemble an encoder to detect the rotation state of the central shaft rod 63 in real time.

[0032] Among them, the encoder configured in the encoder assembly module 8 is used to detect the rotation state of the central shaft rod 63 at the output end. It belongs to a feedback component in the prior art and 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, an absolute encoder can achieve closed-loop control with no cumulative error over the full stroke.

[0033] The specific working states of the output ends of the configured servo drive motor 2 and the manual control wheel 4 are as follows: During electric control: Turn on the servo drive motor 2. Control the first worm 3 at its output end through the servo drive motor 2, and use the first worm 3 to drive the engaged third gear ring 611 to rotate. Since both the third gear ring 611 and the fourth gear ring 612 are fixedly installed on the second partition ring plate 610, the fourth gear ring 612 will rotate around the central shaft rod 63. During the rotation, since the manual control wheel 4 at the manual end is not rotating at this time, and the first gear ring 66 cannot drive the second worm 5 to rotate in the reverse direction, the first gear ring 66 is in a state of being stuck by the second worm 5 during electric control. Therefore, the first gear ring 66 cannot rotate. The fourth gear ring 612 meshes with the auxiliary planetary gear 69 on the outside, but the first gear ring 66 outside the auxiliary planetary gear 69 is not moving at this time. So in this state, each side of the auxiliary planetary gear 69 can only rotate on its own and revolve around the inner wall of the first gear ring 66 during the rotation. Specifically, it is manifested as the first partition ring plate 67 rotating inside the first gear ring 66, and the second gear ring 68 below the first partition ring plate 67 meshes with the planetary gear lubrication module 64 on the outside. As described above, the first gear ring 66 cannot rotate at this time. Therefore, the planetary gear lubrication module 64 can only rotate on its own and synchronously drive the main drive shaft disk 62 to rotate on the inner wall of the first gear ring 66, and finally drive the central shaft rod 63 at the center of the main drive shaft disk 62 to rotate, cooperating with the encoder for servo work. At this time, the driving force at the electric end will not be transmitted to the first gear ring 66, nor will it be reflected at the manual control wheel 4 end, nor will it cause the manual control wheel 4 to generate a reverse driving force to injure people, nor will it form interference due to the reverse force acting on the manual control wheel 4. Moreover, there is no need for additional adjustment structures or separate control structures for adjustment, and it can achieve the effect of automatic locking. Even in the case of repeated power outages, it will not cause a series of interferences due to the control end not being adjusted in time, ensuring operation safety and being worry-free at the same time.

[0034] When manually controlled: Rotate the manual control wheel 4, which drives the second worm 5 to rotate. 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 entire second partition ring disk 610 at the meshing end of the first worm 3 does not rotate and is in a stuck state. As a result, the four groups of auxiliary planetary gears 69 meshing with the outside of the fourth gear ring 612 will not rotate either. However, each auxiliary planetary gear 69 is movable and meshes with the outside first gear ring 66. At this time, the first gear ring 66 engages with each auxiliary planetary gear 69 to form a temporarily integrated movable structure. Specifically, the first gear ring 66 drives the entire first partition ring disk 67 to rotate around the outside of the fourth gear ring 612. Similarly, the planetary gear lubrication module 64 meshes with the second gear ring 68 at the bottom of the first partition ring disk 67 and also meshes with the inside of the first gear ring 66. Therefore, the main drive shaft disk 62 also forms a temporarily integrated structure with the first partition ring disk 67 at this time and rotates following the rotation of the first gear ring 66. Finally, it is shown that when the first gear ring 66 is manually controlled to rotate, it cooperates with the main drive shaft disk 62 and the first partition 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 disk 62. Similar to the electric control, ultimately, the central shaft rod 63 at the axis of the main drive shaft disk 62 rotates, cooperating with the encoder for servo work. At this time, the driving force at the manual end will not be transmitted to the fourth gear ring 612, nor will it be reflected at the servo drive motor 2 end, and thus will not interfere with the electric end. Even in the case of repeated power outages, it will not cause a series of interferences due to the control end not being adjusted in time, nor will it cause errors due to the switching between gear sets.

[0035] As Figures 1 to 10 shown, the planetary gear lubrication module 64 as a whole includes two groups of relatively arranged solid planetary gears and two groups of relatively arranged hollow planetary gears. The hollow planetary gears include a cavity disk 641. A number of gear blocks 642 are fixedly connected to the outer side of the cavity disk 641. A cavity is provided at the top of each gear block 642, and an adsorption cotton block 643 is arranged through the cavity. A second conveying conduit 6415 penetrating into the cavity disk 641 is connected to each adsorption cotton block 643 in communication.

[0036] Among them, the configured planetary gear lubrication module 64 as a whole includes two sets of solid planetary gears arranged oppositely, and two sets of hollow planetary gears arranged oppositely. During the rotation and revolution of the two sets of hollow planetary gears arranged oppositely, lubricating oil can be applied. Because as described in the above structure, the free-switching linkage mechanism 6 as a whole is a two-layer structure, and the gear set needs daily lubrication and maintenance during operation. Due to the influence of the isolation layer, that is, under the isolation of the first partition ring plate 67, it is difficult to maintain the lower gear set. Therefore, a self-lubricating structure is set during rotation to assist the continuous and stable operation of the self-locking structure. The configured adsorption cotton block 643 is a capillary cotton block structure capable of adsorbing liquid in the prior art.

[0037] As Figures 1 to 10 shown, reserved notches 644 are provided at positions between the two gear blocks 642 on the side edge of the cavity disk 641, and a limiting bracket 645 is fixedly installed at the position of each reserved notch 644 on the inner ring side of the cavity disk 641. 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. A semi-circular contact block 649 is fixedly installed on the side of the trigger push plate 647 facing the reserved notch 644.

[0038] As Figures 1 to 10 shown, a reset spring rod 648 is fixedly installed at the axial center position on the 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 ring 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 ring surface of the cavity disk 641, the semi-circular contact block 649 protrudes outward through the reserved notch 644.

[0039] As Figures 1 to 10 shown, a sealed cavity frame 6411 is fixedly installed at the center position inside the cavity disk 641. A liquid storage cavity 6412 is fixedly installed at the center position inside the sealed cavity frame 6411. Reset airbag cavity sleeves 6413 are fixedly installed at positions on the outer edge surface of the liquid storage cavity 6412 facing each reserved notch 644, and one-way valves are configured at the positions where the liquid storage cavity 6412 is connected to the reset airbag cavity sleeves 6413. First conveying conduits 6414 passing through the sealed cavity frame 6411 are connected to the bottoms of the reset airbag cavity sleeves 6413 in a communicating manner. The first conveying conduits 6414 are connected to second conveying conduits 6415 on the adjacent adsorption cotton blocks 643 in a communicating manner.

[0040] 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 needed, the valve can be electrically controlled to be closed. After each time the liquid in the reset airbag cavity sleeve 6413 is squeezed out, it can automatically flow into the reset airbag cavity sleeve 6413 to be replenished.

[0041] 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, two third delivery conduits 9 are installed in the inner cavity of the main drive shaft center disk 62, 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 one end of the third delivery conduit 9 away from the storage tank 10 is respectively connected to the liquid storage cavity 6412 at both ends of the main drive shaft center disk 62 to supply liquid to the liquid storage cavity 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.

[0042] The specific working principle of the cavity disc 641 configured in the planetary gear lubrication module 64 system is as follows: The storage tank 10 is arranged in the cavity of the central shaft 63, and its injection port is exposed on the outside of the central shaft 63, so that it can be replenished in real time, which is convenient for the daily maintenance of the whole system. During each rotation of the sleeve chassis 61, the outer side is meshed and rotated 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 arranged between the gear blocks 642 will be reciprocated and 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 reciprocately 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 non-switchable linkage mechanism 6 is automatically lubricated.

[0043] When the semi-circular contact block 649 is not under force, it can be ejected by the return spring rod 648 on the top plate 646 for subsequent extrusion. On the other hand, the lubricating reagent is stored in the central shaft rod 63. On the one hand, it can not only serve as the second storage end to supplement the reagent to the liquid storage cavities 6412 on both sides, but also improve the heat dissipation effect of the detection end outside the central shaft rod 63. During the preparation process, the position where the inner cavity of the central shaft rod 63 contacts the storage tank 10 can be set as a heat-conducting structure, further improving the stability of the central shaft rod 63 at the detection output end during the operation of the encoder assembly module 8.

[0044] The present invention covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention without these detailed descriptions. Additionally, well-known methods, processes, procedures, components, and circuits are not described in detail to avoid unnecessary confusion to the essence of the present invention.

[0045] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A non-switching device for an electric actuator, comprising an actuator outer casing, on the outer surface of which a servo drive motor and a manual control wheel arranged oppositely are fixedly installed, characterized in that: The output end of the servo drive motor penetrates into the interior of the actuator outer housing, and a first worm is fixedly installed on the penetrating end. The axial center end of the manual control wheel also penetrates into the interior of the actuator outer housing, and a second worm is fixedly installed on the penetrating end. An automatic switching-free linkage mechanism is arranged at the axial center position inside the actuator outer housing; The automatic switching-free linkage mechanism is integrally convex-shaped, including a third gear ring located on the upper side of the convex-shaped structure and a first gear ring located on the lower side of the convex-shaped 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 also arranged at the center positions of the first gear ring and the third gear ring. Both the first gear ring and the third gear ring can independently drive the central shaft rod to rotate; Among them, the first worm meshes with the side of the third gear ring, and the second worm meshes with the side of the first gear ring.

2. The non-switching device of an electric actuator according to claim 1, characterized in that The bottom of the actuator outer housing is fixedly installed with a base sleeve frame through bolts, and a circular ring guide groove is also arranged on the side of the base sleeve frame facing the actuator outer housing. A fitting chassis placed inside the actuator outer housing is movably installed through the circular ring guide groove. A main drive central disk is fixedly installed on the upper surface of the fitting chassis. The central shaft rod is fixedly installed at the center position on the upper surface of the main drive central disk. The interior of the main drive central disk is a cavity structure, and four sets of planetary gear lubrication modules are sequentially arranged at intervals of 90 degrees on the side of the upper surface of the main drive central disk.

3. The non-switching device of an electric actuator according to claim 2, characterized in that, A support retaining ring is fixedly installed on the inner wall of the actuator outer housing. The support retaining ring is located above the main drive central disk. The first gear ring is movably installed above the support retaining ring. Tooth openings are also arranged on the inner ring of the first gear ring and mesh with the four sets of planetary gear lubrication modules through the tooth openings on the inner ring. The center of the base sleeve frame is open-shaped, and a circular ring connecting tooth serving as the output end is arranged on the side of the fitting chassis facing the open shape of the base sleeve frame.

4. The non-switching device of an electric actuator according to claim 3, characterized in that, The automatic switching-free linkage mechanism further includes a first partition ring disk movably sleeved on the upper side of the central shaft rod. The first partition ring disk entirely covers the upper surfaces of the four sets of planetary gear lubrication modules. A second gear ring is fixedly installed on the side of the first partition ring disk facing the planetary gear lubrication modules. The outer side of the second gear ring meshes with the four sets of planetary gear lubrication modules. Four sets of auxiliary planetary gears are sequentially arranged at intervals of 90 degrees on the side of the upper surface of the first partition ring disk. The outer sides of the auxiliary planetary gears are all meshed with the tooth openings on the inner ring of the first gear ring.

5. The non-switching device of an electric actuator according to claim 4, characterized in that, The no-switch linkage mechanism further includes a second partition ring disk movably sleeved on the central shaft rod and located above the first partition ring disk. The second partition ring disk entirely covers the upper surface of the auxiliary planetary gear, and a fourth gear ring is fixedly installed on the side of the second partition ring disk facing the auxiliary planetary gear. The outer side edge of the fourth gear ring meshes with the four groups of auxiliary planetary gears. The third gear ring is fixedly installed on the upper surface of the second partition ring disk. The upper side of the central shaft rod penetrates through the top of the actuator outer shell, and an encoder assembly module is configured at the position of the top of the actuator outer shell where the actuator outer shell penetrates out to assemble an encoder to detect the rotation state of the central shaft rod in real time.

6. The non-switching device of an electric actuator according to claim 5, characterized in that, The planetary gear lubrication module entirely includes two groups of solid planetary gears arranged oppositely, and two groups of hollow planetary gears arranged oppositely. The hollow planetary gear includes a cavity disk. A plurality of gear blocks are fixedly connected to the outer side edge of the cavity disk, and a cavity is opened at the top of each gear block, and an absorbent cotton block is arranged through the cavity. The absorbent cotton blocks are all connected in communication with a second delivery conduit penetrating into the cavity disk.

7. The non-switching device of an electric actuator according to claim 6, characterized in that, Reserved notches are opened at the positions between the two gear blocks on the side edge of the cavity disk, and a limit bracket is fixedly installed at the position of each reserved notch on the inner ring side of the cavity disk. A top plate is fixedly installed on the outside of the limit bracket, and a trigger push plate is slidably installed on the limit bracket. A semi-circular contact block is fixedly installed on the side of the trigger push plate facing the reserved notch.

8. The non-switching device of an electric actuator according to claim 7, characterized in that, A reset spring rod is fixedly installed at the central position of the 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 closely attached to the inner ring surface of the cavity disk under the action of the reset thrust. When the trigger push plate is closely attached to the inner ring surface of the cavity disk, the semi-circular contact block protrudes outwards through the reserved notch.

9. The non-switching device of an electric actuator according to claim 8, characterized in that, A sealed cavity frame is fixedly installed at the central position inside the cavity disk. A liquid storage cavity is fixedly installed at the central position inside the sealed cavity frame. Reset airbag cavity sleeves are fixedly installed at the positions of the outer edge surface of the liquid storage cavity facing each reserved notch, and one-way valves are configured at the positions where the liquid storage cavity intersects with the reset airbag cavity sleeves. The bottoms of the reset airbag cavity sleeves are all connected in communication with a first delivery conduit penetrating out of the sealed cavity frame, and the first delivery conduit is connected in communication with the second delivery conduit on the adjacent absorbent cotton block.

10. The non-switching device of an electric actuator according to claim 9, characterized in that, A cavity is opened inside the central shaft rod, and a storage tank is fixedly installed through the cavity. Two third delivery conduits are installed in the inner cavity of the main drive central disk. The third delivery conduits penetrate into the inside of the central shaft rod and are connected in communication with the bottom of the storage tank. The ends of the third delivery conduits away from the storage tank are respectively connected in communication with the liquid storage cavities at both ends of the main drive central disk to supply liquid to the liquid storage cavities. Two extension rods penetrating into the inside of the sealed cavity frame and fixedly connected to the facing reset airbag cavity sleeves are fixedly installed on the surface of the trigger push plate.

Images