Automatic switching and connecting device for electric lifting appliance

Abstract

The utility model relates to the field of electric lifting appliances, and particularly discloses an automatic conversion connecting device of an electric lifting appliance, which comprises an upper connecting mechanism and a lower connecting mechanism, the upper connecting mechanism comprises a locking assembly, a fixed seat and an upper mounting plate, the fixed seat is fixedly connected with the upper mounting plate, the locking assembly is mounted on the upper mounting plate and comprises a driving part, a moving plate, a bolt, a connecting plate, a rotating shaft and a locking plate, the driving part is fixed on the fixed seat, and a driving part of the driving part is in linkage connection with the moving plate to drive the moving plate to move; a limiting hole is formed in the connecting plate, the bolt is fixedly connected with the moving plate and inserted into the limiting hole, the rotating shaft penetrates through the upper mounting plate and the connecting plate and is fixedly connected with the rotating shaft, the moving plate is in linkage fit with the rotating shaft through the bolt and the connecting plate, and the locking plate is fixedly connected to the end, facing the lower connecting mechanism, of the rotating shaft. The lower connecting mechanism comprises a lower mounting plate, and a locking insertion hole corresponding to the locking plate is formed in the lower mounting plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric hoist field, especially in one kind electric hoist automatic conversion connecting device. BACKGROUND

[0002] Electric hoist is divided into various electric hoists according to the different objects hoisted, and is mainly used in metallurgical steel plant, such as slab hoist, steel coil hoist, roll hoist and the like.

[0003] The existing patent application No. CN201520193566.0 is a kind of hoist used in wharf crane, including upper hoist body, lower hoist body, the upper hoist body, lower hoist body middle is equipped with round hole, connecting shaft passes through the round hole of upper hoist body, the round hole of lower hoist body in proper order, and its upper end is arranged on the upper hoist body by fixed part, and the connecting shaft is equipped with bearing at the connecting place of upper and lower hoist body.

[0004] As described above, the connection between the upper hoist body and the lower hoist body in the existing electric hoist is usually only through the connecting shaft at the center to penetrate both, which may cause loosening or damage due to uneven stress or vibration when bearing heavy objects or receiving dynamic load, lacks sufficient stability, and if the connecting shaft or bearing fails, the entire hoist body may need to be disassembled for maintenance or replacement, which increases the complexity and cost of maintenance, and due to the lack of stability and wear problems, this connection method may have safety hazards, and in extreme cases, it may cause the object to fall off or the crane to lose control, causing serious consequences. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of electric hoist automatic conversion connecting device to solve the technical problems of lack of sufficient stability, higher maintenance cost and lower safety in prior art.

[0006] To solve the above problems, the electric hoist automatic conversion connecting device provided by the utility model adopts the following technical scheme: including upper connecting mechanism and lower connecting mechanism.

[0007] The upper connecting mechanism comprises a locking assembly, a fixing seat and an upper mounting plate, the fixing seat and the upper mounting plate are fixedly connected, the locking assembly is installed on the upper mounting plate, the locking assembly comprises a driving member, a moving plate, a bolt, a connecting plate, a rotating shaft and a locking plate, the driving member is fixed on the fixing seat, the driving part of the driving member is linked and connected with the moving plate to drive the moving plate to move, the connecting plate is provided with a limiting hole, the bolt is fixedly connected with the moving plate and is inserted into the limiting hole, the rotating shaft penetrates through the upper mounting plate, the connecting plate is fixedly connected with the rotating shaft, the moving plate is linked and matched with the rotating shaft through the bolt and the connecting plate, so that the movement of the moving plate can drive the rotating shaft, and the locking plate is fixedly connected with one end of the rotating shaft facing the lower connecting mechanism;

[0008] The lower connecting mechanism comprises a lower mounting plate, and the lower mounting plate is provided with a locking insertion hole corresponding to the locking plate.

[0009] Further, the moving plate comprises a fixed part, a mounting part and a connecting part, the connecting part is located at the top end face of the fixed part, the driving part of the driving member is linked and connected, and the mounting part is located at the side wall of the fixed part.

[0010] Further, the upper mounting plate is provided with a sliding rail, and the moving plate is slidably installed on the upper mounting plate through the sliding rail.

[0011] Further, the upper connecting mechanism further comprises a limiting piece, and the limiting piece is located at the front end and / or the rear end of the moving plate to limit the movable range of the moving plate.

[0012] Further, in the vertical direction, a gap is formed between the fixing seat and the upper mounting plate, the locking assembly is installed between the fixing seat and the upper mounting plate, and the lower connecting mechanism is located below the upper mounting plate.

[0013] Further, the rotating shaft, the connecting plate, the bolt, the locking plate and the locking insertion hole each comprise two groups and are one-to-one corresponding, the two groups of rotating shafts are located on both sides of the horizontal center axis of the moving plate, and the two groups of connecting plates are symmetrically distributed about the horizontal center axis of the moving plate.

[0014] Further, the length of the locking plate is greater than the width thereof, or the length of the locking plate is less than the width thereof.

[0015] Further, the lower mounting plate is provided with a plug assembly, the plug assembly is used for electrically connecting with the equipment needing power supply, the upper mounting plate is provided with a socket matched with the plug assembly, and the socket is electrically connected with a power supply.

[0016] Further, the plug assembly comprises an electric contact, a spring and a shell, the spring and the shell are sequentially sleeved on the outer periphery of the electric contact from inside to outside, the shell is fixedly connected with the lower mounting plate, the upper and lower ends of the spring are respectively abutted with the shell and the electric contact, the electric contact comprises an outward extending end, the outward extending end is electrically connected with the socket, and the outward extending end extends out of the shell.

[0017] Further, the upper mounting plate is provided with a guide plate matched with the lower mounting plate on the side facing the lower connecting mechanism, and the end of the guide plate away from the upper mounting plate is provided with an inverted funnel type structure.

[0018] The electric hoist automatic conversion connecting device has the advantages that:

[0019] 1. When the driving member is started and drives the moving plate to move linearly, the bolt moves with the moving plate, and since the bolt is inserted into the limiting hole, it can adapt to the rotation of the connecting plate and maintain linkage with the connecting plate through the limiting hole;

[0020] 2. With the movement of the bolt, the connecting plate is driven, and the rotation of the rotating shaft is realized through the fixed connection, and the rotation of the rotating shaft finally drives the locking plate to swing, and the locking plate cooperates with the locking hole of the lower connecting mechanism to realize the locking or unlocking function;

[0021] 3. The device realizes the automation of the locking and unlocking functions through the precise control of the driving member, can effectively improve the work efficiency, reduce the complexity of manual operation, has high space utilization, maintains good stability and reliability, and can bear a large load. BRIEF DESCRIPTION OF DRAWINGS

[0022] The above and other objects, features and advantages of the present application will become easily understandable by reading the detailed description of exemplary embodiments of the present application with reference to the attached drawings. In the drawings, several embodiments of the present application are shown by way of example and not limitation, and the same or corresponding reference numbers indicate the same or corresponding parts, in which:

[0023] Figure 1 FIG. 1 is a structural schematic view of an electric hoist automatic conversion connecting device according to the present application;

[0024] Figure 2 FIG. 2 is a structural schematic view of an upper connecting mechanism of the electric hoist automatic conversion connecting device according to the present application;

[0025] Figure 3 FIG. 3 is a top view structural schematic view of the upper connecting mechanism of the electric hoist automatic conversion connecting device according to the present application;

[0026] Figure 4 FIG. 4 is a structural schematic view of a moving plate of the electric hoist automatic conversion connecting device according to the present application;

[0027] Figure 5 FIG. 5 is a bottom view structural schematic view of the upper connecting mechanism of the electric hoist automatic conversion connecting device according to the present application;

[0028] Figure 6A lower connecting mechanism structure schematic view of the automatic conversion connecting device of the electric hoist.

[0029] Figure 7 A plug assembly sectional view structure schematic view of the automatic conversion connecting device of the electric hoist.

[0030] Explanation of reference signs:

[0031] 1, upper connecting mechanism;11, locking assembly;111, driving piece;112, moving plate;1121, fixed part;1122, mounting part;1123, connecting part;113, bolt;114, connecting plate;1141, limiting hole;115, rotating shaft;116, locking plate;12, fixed seat;13, upper mounting plate;131, sliding rail;132, guide plate;14, limiting piece;141, movable groove;15, socket;

[0032] 2, lower connecting mechanism;21, plug assembly;211, electric connection contact;212, spring;213, shell;22, lower mounting plate;221, locking jack. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and those skilled in the art should know that the embodiments described below are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0034] Any element quantity in the drawings is used for example and is not limited, and any naming is only used for distinction, and does not have any limiting meaning.

[0035] The principles and spirits of the present application will be explained in detail below with reference to several representative embodiments of the present application.

[0036] The automatic conversion connecting device of the electric hoist provided by the present application, as shown in the figure, comprises an upper connecting mechanism 1 and a lower connecting mechanism 2. Figures 1 to 3

[0037] In the embodiment, the upper connecting mechanism 1 is responsible for being connected with the hoisting equipment or structure above, and has the functions of locking and releasing the lower connecting mechanism 2.

[0038] ​In the embodiment, the upper connecting mechanism 1 comprises a locking assembly 11, a fixing base 12 and an upper mounting plate 13. The fixing base 12 and the upper mounting plate 13 are fixedly connected. The locking assembly 11 is installed on the upper mounting plate 13. The locking assembly 11 comprises a driving member 111, a moving plate 112, a bolt 113, a connecting plate 114, a rotating shaft 115 and a locking plate 116. The driving member 111 is fixed on the fixing base 12. A driving part of the driving member 111 is linked with the moving plate 112 to drive the moving plate 112 to move. The connecting plate 114 is provided with a limiting hole 1141. The bolt 113 is fixedly connected with the moving plate 112 and is inserted into the limiting hole 1141. The rotating shaft 115 penetrates through the upper mounting plate 13. The connecting plate 114 is fixedly connected with the rotating shaft 115. The moving plate 112 is linked with the bolt 113, the connecting plate 114 and the rotating shaft 115 to drive the rotating shaft 115 to move when the moving plate 112 moves. The locking plate 116 is fixedly connected with one end of the rotating shaft 115 which faces the lower connecting mechanism 2.

[0039] In the embodiment, the fixing base 12 and the upper mounting plate 13 are fixedly connected to serve as a support base of the whole upper connecting mechanism 1 and provide mounting positions for other assemblies. In the embodiment, the upper mounting plate 13 is fixedly connected with the fixing base 12 by bolts to provide a mounting platform for the locking assembly 11.

[0040] In the embodiment, the driving member 111 is a main power source in the locking assembly 11. The moving plate 112 moves linearly under the driving of the driving member 111. The bolt 113 is fixedly connected with the moving plate 112 and can move with the moving plate 112. The bolt 113 is connected with the connecting plate 114 through the limiting hole 1141 to allow the bolt 113 to have a certain freedom of movement and rotation in the limiting hole 1141. When the moving plate 112 drives the bolt 113 to move, the bolt 113 can slide in the limiting hole 1141 to drive the connecting plate 114 and the rotating shaft 115 connected with the connecting plate 114 to rotate. The limiting hole 1141 allows the connecting plate 114 to adapt to the change of the rotating angle of the rotating shaft 115 to effectively increase the flexibility and adaptability of the locking assembly 11.

[0041] In the embodiment, the limiting hole 1141 is a strip-shaped hole.

[0042] When the driving member 111 starts and drives the moving plate 112 to move linearly, the pin 113 moves with the moving plate 112. Since the pin 113 is inserted into the limiting hole 1141, it can adapt to the rotation of the connecting plate 114 and keep linkage with the connecting plate 114 through the limiting hole 1141. With the movement of the pin 113, the connecting plate 114 is driven, and then the rotation of the rotating shaft 115 is realized through fixed connection, and the rotation of the rotating shaft 115 finally drives the locking plate 116 to swing. The locking plate 116 cooperates with the locking hole (described below) of the lower connecting mechanism 2 to realize the locking or unlocking function.

[0043] In other embodiments, the driving member 111 can be a motor, a cylinder or other device capable of generating linear or rotary motion.

[0044] It should be noted that the moving distance and direction of the moving plate 112 are determined by the output characteristics of the driving member 111. The material and structure of the moving plate 112 need to ensure its rigidity and directivity to ensure its smooth and accurate movement.

[0045] In this embodiment, the moving plate 112 includes a fixed part 1121, a mounting part 1122 and a connecting part 1123. The connecting part 1123 is located at the top end surface of the fixed part 1121, and the driving part of the driving member 111 is connected with the connecting part 1123. The mounting part 1122 is located on the side wall of the fixed part 1121, and the pin 113 is mounted on the mounting part 1122.

[0046] In this embodiment, the fixed part 1121 is the basic structure of the moving plate 112, mainly used to provide stable support and positioning function, to ensure that the moving plate 112 can remain stable when subjected to driving force, without deformation or displacement; the mounting part 1122 is located on the side wall of the fixed part 1121, which is the mounting position of the pin 113. The mounting part 1122 is provided in the form of a boss or bracket protruding from the side wall of the fixed part 1121, so as to facilitate the installation and fixation of the pin 113, and to ensure that the pin 113 can remain stable during movement without falling off due to vibration or impact. The mounting part 1122 is designed with a hole for firmly mounting the pin 113 on the moving plate 112; the connecting part 1123 is located at the top end surface of the fixed part 1121, which is the connection point between the driving member 111 and the moving plate 112. Through the connecting part 1123, the driving member 111 can transmit driving force to the moving plate 112 to move in a predetermined direction.

[0047] In this embodiment, when the driving member 111 is started, its driving part cooperates with the connecting part 1123 of the moving plate 112 to transmit the driving force to the moving plate 112. After receiving the driving force, the moving plate 112 moves in the predetermined direction through the stable support and positioning function provided by the fixing part 1121. At the same time, the latch 113 installed on the mounting 1122 cooperates with the limiting hole 1141 on the connecting plate 114 and slides with the movement of the moving plate 112.

[0048] In this embodiment, the upper mounting plate 13 is provided with a sliding rail 131, and the moving plate 112 is slidably mounted on the upper mounting plate 13 through the sliding rail 131. In this embodiment, the moving plate 112 cooperates with the sliding rail 131 through the sliding groove or sliding block at the bottom to form a sliding connection, realizing the slidable installation on the upper mounting plate 13, allowing the moving plate 112 to move linearly under the guidance of the sliding rail 131 without deviation or shaking. Moreover, the sliding rail 131 not only provides a sliding path for the moving plate 112, but also plays a guiding and positioning role, ensuring that the moving plate 112 always maintains the correct position and posture during sliding.

[0049] It should be noted that in use, the upper mounting plate 13 is usually fixed and provides a mounting basis for other components.

[0050] In other embodiments, the moving plate 112 can be equipped with various functional components such as sensors and actuators as needed.

[0051] In this embodiment, when the driving member 111 is started, its driving part transmits power to the moving plate 112 through the connecting part 1123 of the moving plate 112. Under the action of the power, the moving plate 112 starts to move linearly along the sliding rail 131. Due to the precise guiding and positioning effect of the sliding rail 131, the moving plate 112 can smoothly and accurately move to the predetermined position.

[0052] In other embodiments, the sliding rail 131 is fixedly installed on the surface of the upper mounting plate 13 by bolt connection, welding or other fastening methods.

[0053] In this embodiment, the upper connecting mechanism 1 further includes a limiting member 14, which is located at the front end and / or rear end of the movable plate 112 to limit the movable range of the movable plate 112. The limiting member 14 effectively increases the safety of the locking assembly 11 and prevents damage or danger caused by excessive movement of the movable plate 112. In this embodiment, there are two sets of limiting members 14, which are located at the front end and rear end of the movable plate 112, respectively. The limiting members 14 are fixedly installed on the side wall of the upper mounting plate 13 by welding. When the driving member 111 starts and drives the movable plate 112 to slide along the slide rail 131, the movable plate 112 will be restricted by the limiting member 14. When the front end or rear end of the movable plate 112 contacts the limiting member 14, the limiting member 14 will prevent it from continuing to move, thereby ensuring that the movable plate 112 remains within the predetermined range of motion.

[0054] In this embodiment, the limiting member 14 includes an active groove 141 for accommodating the movable plate 112. One end of the movable plate 112 is always located in the active groove 141, which can ensure that the movable plate 112 always maintains the correct position and posture during the sliding process, thereby improving the accuracy of the locking assembly 11.

[0055] In this embodiment, the slide rail 131 and the limiting member 14 can ensure the smooth and accurate movement of the moving plate 112, thereby effectively improving the energy transfer efficiency.

[0056] In this embodiment, a gap exists between the fixed base 12 and the upper mounting plate 13 along the vertical direction. The locking assembly 11 is installed between the fixed base 12 and the upper mounting plate 13, and the lower connecting mechanism 2 is located below the upper mounting plate 13. In this embodiment, the fixed base 12 and the upper mounting plate 13 are the main supporting components of the structure. The locking assembly 11 is installed between the fixed base 12 and the upper mounting plate 13. Through ingenious design, the various parts cooperate with each other, achieving structural stability and precision, and maximizing space utilization.

[0057] In this embodiment, the rotating shaft 115, connecting plate 114, pin 113, locking plate 116, and locking hole are each comprised in two sets, corresponding one-to-one. The two sets of rotating shafts 115 are located on both sides of the horizontal central axis of the moving plate 112, and the two sets of connecting plates 114 are symmetrically distributed about both sides of the horizontal central axis of the moving plate 112. In this embodiment, each set of rotating shafts 115, connecting plate 114, pin 113, locking plate 116, and locking hole is matched and cooperates with each other to achieve the rotation of the rotating shaft 115 by driving the moving plate 112 to move.

[0058] In this embodiment, the layout of the two sets of rotating shafts 115 and the two sets of connecting plates 114 is symmetrical with respect to the center of the moving plate 112, which helps to maintain the balance and stability of the mechanical structure, while providing sufficient strength and reliability.

[0059] In this embodiment, four pins 113 and four rotating shafts 115 are provided, located at the four corners of the lower mounting plate (as described below), which can ensure that the mechanical structure can distribute the load evenly when under stress and reduce local stress concentration.

[0060] It should be noted that the selection of the number of pins 113 and shafts 115 is usually based on factors such as the functional requirements, stability requirements, and material properties of the mechanical structure. Four pins 113 and four shafts 115 may mean that the mechanical structure needs to provide stable connection and rotational support in multiple directions.

[0061] In this embodiment, the length of the locking plate 116 is greater than its width; or, the length of the locking plate 116 is less than its width. In this embodiment, the locking plate 116 has different dimensions in the horizontal direction (length) and the vertical direction (width) so that the locking plate 116 can be rotated to cooperate with the locking hole of the lower connecting mechanism 2 (as described below) to achieve locking or unlocking functions.

[0062] In other embodiments, the locking plate 116 may be of any shape with unequal aspect ratios.

[0063] In this embodiment, the locking component 11 achieves rapid response in locking and unlocking through precise control of the drive component 111, which can effectively improve work efficiency.

[0064] In this embodiment, the lower connecting mechanism 2 includes a lower mounting plate 22, on which a locking hole 221 corresponding to the locking plate 116 is provided. The locking hole 221 is used to receive the locking force from the upper connecting mechanism 1, thereby achieving a stable connection with the upper connecting mechanism.

[0065] It should be noted that the shape, position, and number of locking holes 221 are matched with the shape, size, and installation requirements of locking plate 116.

[0066] In this embodiment, when the upper and lower connecting mechanisms need to be connected, the lower connecting machine 2 rises, the locking plate 116 is inserted into the locking socket 221 of the lower connecting machine 2, the driving component 111 is activated, and the moving plate 112 is driven to move in a certain direction. The moving plate 112 drives the connecting plate 114 to slide in the limiting hole 1141 through the pin 113, thereby driving the rotating shaft 115 to rotate. When the rotating shaft 115 rotates, the locking plate 116 at its end rotates accordingly to achieve locking. Conversely, when the connection needs to be disconnected, the driving component 111 drives the moving plate 112 to move in the opposite direction to achieve unlocking, and then drives the lower connecting machine 2 to descend, so that the locking plate 116 disengages from the locking socket 221 of the lower connecting mechanism 2, thereby releasing the lower connecting machine 2.

[0067] In this embodiment, a plug assembly 21 is installed on the lower mounting plate 22. The plug assembly 21 is used to electrically connect with a device that needs to be powered. A socket 15 is installed on the upper mounting plate 13 to be plugged into the plug assembly 21. The socket 15 is electrically connected to the power source.

[0068] It should be noted that the plug assembly 21 and the socket 15 are connected by plugging to achieve electrical connection, which is existing technology. Those skilled in the art should be clear about its structure, principle and usage, etc., and will not be described in detail here.

[0069] In this embodiment, the plug assembly 21 includes an electrical contact head 211, a spring 212, and a housing 213. The spring 212 and the housing 213 are sequentially fitted around the outer periphery of the electrical contact head from the inside to the outside. The housing 213 is fixedly connected to the lower mounting plate 22. The upper and lower ends of the spring 212 abut against the housing 213 and the electrical contact head, respectively. The electrical contact head 211 includes an extended end that makes electrical contact with the socket 15 and extends beyond the housing 213. The housing 213 is mainly used to protect the electrical contact head 211 from damage and can effectively reduce maintenance costs.

[0070] In this embodiment, because the spring 212 has a certain elasticity, it can adapt to the slight tolerance differences that may exist between the plug assembly 21 and the socket 15. Even if the position or shape of the socket 15 changes slightly, the spring 212 can ensure a tight contact between the electrical contact head 211 and the socket 15. Furthermore, the buffering effect of the spring 212 can effectively reduce the direct impact and wear between the electrical contact head 211 and the socket 15, which helps to extend the service life of the plug assembly 21 and the socket 15 and reduce damage caused by frequent plugging and unplugging.

[0071] In this embodiment, a guide plate 132 matching the lower mounting plate 22 is provided on the side of the upper mounting plate 13 facing the lower connecting mechanism 2. The end of the guide plate 132 away from the upper mounting plate 13 is set as an inverted funnel-shaped structure. The guide plate 132 plays a guiding role, which helps to guide the lower connecting mechanism 2 to rise along the correct path and cooperate with the upper connecting mechanism 1, thereby effectively improving the accuracy of the connection and reducing the risk of misoperation.

[0072] This utility model provides an automatic conversion and connection device for electric lifting devices. Through modular design, the various components are easy to install, disassemble, and maintain, reducing maintenance costs. It can also be customized and expanded according to actual needs. In addition, the integrated design makes the entire device compact, occupies little space, and is suitable for various complex environments, while maintaining good stability and reliability and being able to withstand large loads. Through precise cooperation and efficient linkage between multiple components, the device achieves multiple benefits such as reliability, flexibility, compactness, efficient energy transfer, and ease of maintenance and replacement of the mechanical structure. At the same time, it also meets the locking and unlocking function requirements in specific application scenarios.

[0073] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0074] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. An automatic conversion and connection device for electric lifting tools, characterized in that, Includes an upper connecting mechanism and a lower connecting mechanism; The upper connecting mechanism includes a locking assembly, a fixed base, and an upper mounting plate. The fixed base and the upper mounting plate are fixedly connected. The locking assembly is mounted on the upper mounting plate. The locking assembly includes a driving component, a moving plate, a pin, a connecting plate, a rotating shaft, and a locking plate. The driving component is fixed on the fixed base. The driving part of the driving component is linked to the moving plate to drive the moving plate to move. The connecting plate is provided with a limit hole. The pin is fixedly connected to the moving plate and is inserted into the limit hole. The rotating shaft passes through the upper mounting plate. The connecting plate is fixedly connected to the rotating shaft. The moving plate is linked to the rotating shaft through the pin, the connecting plate, and the rotating shaft so that the movement of the moving plate can drive the rotating shaft. The locking plate is fixedly connected to the end of the rotating shaft facing the lower connecting mechanism. The lower connecting mechanism includes a lower mounting plate, which has locking holes corresponding to the locking plate.

2. The automatic conversion and connection device for electric lifting tools according to claim 1, characterized in that, The movable plate includes a fixing part, a mounting part, and a connecting part. The connecting part is located on the top end face of the fixing part. The driving part of the driving component is connected to the connecting part. The mounting part is located on the side wall of the fixing part, and the pin is installed on the mounting part.

3. The automatic conversion and connection device for electric lifting tools according to claim 1, characterized in that, The upper mounting plate is equipped with a slide rail, and the movable plate can be slidably mounted on the upper mounting plate via the slide rail.

4. An automatic conversion and connection device for electric lifting equipment according to any one of claims 1 to 3, characterized in that, The upper connecting mechanism also includes a limiting member located at the front and / or rear end of the moving plate to limit the movable range of the moving plate.

5. An automatic conversion and connection device for electric lifting equipment according to any one of claims 1 to 3, characterized in that, In the vertical direction, there is a gap between the fixed base and the upper mounting plate, the locking assembly is installed between the fixed base and the upper mounting plate, and the lower connecting mechanism is located below the upper mounting plate.

6. An automatic conversion and connection device for electric lifting equipment according to any one of claims 1 to 3, characterized in that, The rotating shaft, connecting plate, pin, locking plate, and locking hole are each included in two sets and correspond one-to-one. The two sets of rotating shafts are located on both sides of the horizontal central axis of the moving plate, and the two sets of connecting plates are symmetrically distributed about both sides of the horizontal central axis of the moving plate.

7. The automatic conversion and connection device for electric lifting equipment according to claim 6, characterized in that, The length of the locking plate is greater than its width; or the length of the locking plate is less than its width.

8. An automatic conversion and connection device for electric lifting equipment according to any one of claims 1 to 3, characterized in that, The lower mounting plate is equipped with a plug assembly for electrical connection to equipment requiring power. The upper mounting plate is equipped with a socket that mates with the plug assembly and is electrically connected to the power source.

9. The automatic conversion and connection device for electric lifting equipment according to claim 8, characterized in that, The plug assembly includes an electrical contact head, a spring, and a housing. The spring and housing are sequentially fitted around the outer periphery of the electrical contact head from the inside out. The housing is fixedly connected to the lower mounting plate. The upper and lower ends of the spring abut against the housing and the electrical contact head, respectively. The electrical contact head includes an extended end that makes electrical contact with the socket and extends beyond the housing.

10. An automatic conversion and connection device for electric lifting equipment according to any one of claims 1 to 3, characterized in that, A guide plate matching the lower mounting plate is provided on the side of the upper mounting plate facing the lower connecting mechanism, and the end of the guide plate away from the upper mounting plate is set as an inverted funnel-shaped structure.

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