Slow transmission motor automatic docking device and automatic docking system comprising same

Abstract

The utility model relates to a slow transmission motor automatic docking device and an automatic docking system comprising the same. The automatic butt joint device of the slow transmission motor comprises an electric push rod, an extension rod and a transmission rod, a piston rod stretches out and draws back to drive the extension rod to move linearly, then the transmission rod is driven to rotate, the transmission rod pushes a transmission bearing to move axially, then a coupler is driven to move axially, and therefore separation and cooperation of the coupler and a driven shaft are achieved. The automatic butt joint device is electrically driven through the electric push rod, automatic closing of the slow transmission motor coupler of the calcining furnace is achieved in a mechanical transmission mode, manual participation is not needed in the closing process of the slow transmission motor coupler, the requirement for automation of the device is met, the needed working space is small, and the working efficiency is high. Structural transformation is carried out based on an existing slow transmission motor mounting base, the overall layout of the calcining furnace is not affected, and the structure is simple.

Description

Technical Field

[0001] The utility model belongs to the field of automatic docking devices for transmission motors, and in particular relates to an automatic docking device for slow transmission motors and an automatic docking system comprising the same. Background Art

[0002] Soda ash products are mainly divided into heavy soda ash and light soda ash. No matter which type of soda ash is produced, it must go through a calcination process. Therefore, calcination furnace equipment has become an indispensable production and processing equipment in soda ash processing.

[0003] The calcining furnace is divided into heavy ash furnace and light ash furnace. Each start and stop process of the calcining furnace requires the participation of the slow transmission motor at the tail of the calcining furnace. The main function of the slow transmission motor is to prevent the transmission motor from directly driving the calcining furnace to rotate, causing the calcining furnace to rotate too fast, thereby reducing the safety hazards caused by the calcining furnace rotating too fast. Therefore, the slow transmission motor plays a key role in the start and stop process of the calcining furnace.

[0004] At present, the slow-drive motors in many alkali plants in my country are all manually advanced. This process has the following defects: (1) Each manual advancement requires at least two people to work on site, and the efficiency of manual coordination is low; (2) The working space required to push the slow-drive motor coupling is large; (3) Each closing process of the slow-drive motor coupling has certain production safety hazards, which is not conducive to the continuous production of soda ash. Utility Model Content

[0005] The utility model aims to solve the problems that the existing manual propulsion combined with a slow transmission motor has low working efficiency, requires a large working space, has certain production safety hazards, and is not conducive to the continuous production of soda ash. To this end, the utility model provides an automatic docking device for a slow transmission motor.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model provides an automatic docking device for a slow transmission motor, the automatic docking device comprises: an electric push rod, an extension rod and a transmission rod, wherein the electric push rod is arranged on one side of the axial direction of the slow transmission motor, a retractable piston rod is arranged at the end of the electric push rod, the extension rod and the electric push rod are arranged on the same side of the axial direction of the slow transmission motor, one end of the extension rod is matched with the piston rod, and the other end is rotatably matched with the transmission rod, the other end of the transmission rod is rotatably matched with a transmission bearing sleeved on the outside of a coupling installed at the end of the slow transmission motor, and the other end of the coupling is matched with a driven shaft (an extended shaft of a driven device), the extension of the piston rod drives the extension rod to move linearly, and then drives the transmission rod to rotate, so that the transmission rod pushes the transmission bearing to move axially, and then drives the coupling to move axially, thereby realizing the separation and matching of the coupling and the driven shaft.

[0008] The automatic docking device of the slow-drive motor of the present application is applicable to the coupling that can move axially, and docks at low speed, and is particularly applicable to the automatic docking device of the slow-drive motor of the light and heavy ash furnace. In the case of the automatic docking device of the slow-drive motor of the light and heavy ash furnace, the driven shaft is the driving rotating shaft of the light and heavy return furnace.

[0009] The axial movement distance of the coupling is generally 0-50mm, so that the coupling can be docked.

[0010] In the present application, the coupling is a separation coupling, and its axial reciprocating movement is a docking movement. The forward movement can be docked, and the torque can be transmitted after docking. The backward movement is a separation coupling.

[0011] Furthermore, in the above-mentioned automatic docking device, the transmission rod is shaped like a harpoon as a whole, and the transmission rod includes a first double rod end and a second double rod end that are connected to each other (integrally formed or welded), the first double rod end is connected to an extension rod (electric push rod), and the second double rod end is connected to a coupling. The distance between the upper and lower rods of the second double rod end is greater than the distance between the upper and lower rods of the first double rod end, the distance between the upper and lower rods of the second double rod end is equal to or slightly greater than the diameter of the outer ring of the transmission bearing, the distance between the upper and lower rods of the first double rod end is equal to or slightly greater than the diameter of the extension rod, the upper and lower rod ends of the first double rod end are both provided with waist-shaped holes (preferably symmetrically), the upper and lower rod ends of the second double rod end are both provided with waist-shaped grooves (preferably symmetrically), and the top and bottom ends of the outer ring surface of the transmission bearing are both provided with convex rods, and the convex rods are respectively connected to the waist-shaped grooves in rotation.

[0012] Furthermore, in the above-mentioned automatic docking device, the automatic docking device also includes: a connecting pin, the first double rod end is connected to the extension rod pin through the connecting pin, and the connecting pin passes through the waist-shaped hole opened at the end of the upper rod of the first double rod end, the pin hole opened at the end of the extension rod, and the waist-shaped hole opened at the end of the lower rod of the first double rod end in sequence.

[0013] Furthermore, in the above-mentioned automatic docking device, the piston rod is threadedly connected to one end of the extension rod, the end of the piston rod is provided with an external thread, and the other end of the extension rod is provided with an internal thread matched with the external thread.

[0014] Furthermore, in the above automatic docking device, the automatic docking device further comprises: a push rod bracket, the push rod bracket is arranged at the bottom of the electric push rod, and the electric push rod is fixedly mounted on the push rod bracket (for example, by bolts). The electric push rod can have a limit device, which is a sensor, and can be adjusted to a corresponding working position during the debugging process.

[0015] Furthermore, in the above-mentioned automatic docking device, a base is fixedly installed at the bottom of the slow transmission motor, and the push rod bracket is fixedly installed on the base (for example, through anchor bolts).

[0016] Furthermore, in the above automatic docking device, the automatic docking device also includes: a rotating bracket, the rotating bracket is arranged at the bottom of one end of the second double rod end (close to one end of the first double rod end), the bottom of the rotating bracket is fixedly installed on the base (for example, by anchor bolts), the top of the rotating bracket is rotatably connected with the bottom of the lower rod of the second double rod end, the bottom of the lower rod of the second double rod end is provided with a convex shaft, and the top of the rotating bracket is provided with a groove adapted to the convex shaft. The transmission rod is inserted into the rotating bracket. It has rotational freedom.

[0017] Furthermore, in the above automatic docking device, a stepped groove is provided near the flat end of the coupling, and the transmission bearing is installed in the stepped groove. The slow transmission motor and the coupling are connected by a pin shaft, and the transmission bearing is inserted into the coupling to realize the transmission of the axial front and rear force of the coupling. The transmission bearing extends a short rod in the up and down directions, and the second double rod end of the transmission rod is inserted into the short rod to transmit torque.

[0018] The piston extension distance of the electric push rod is K times the moving distance of the coupling, where K is the transmission ratio of the transmission rod, K=A / B, where A is the vertical distance from the waist-shaped hole to the center of the rotating bracket, and B is the vertical distance from the center of the rotating bracket to the waist-shaped groove.

[0019] Furthermore, in the above-mentioned automatic docking device, the slow transmission motor has a speed range of 0-60r / min, and is preferably a slow transmission motor suitable for light ash furnaces and heavy ash furnaces.

[0020] The utility model also provides an automatic docking system, comprising a slow-drive motor and the automatic docking device.

[0021] In the utility model, the transmission rod, the rotating bracket, the extension rod, the connecting pin shaft, the electric push rod, and the push rod bracket can be made of steel such as stainless steel.

[0022] In the present application, an electric push rod is an electric drive device that converts the rotational motion of a motor into the linear reciprocating motion of a push rod, and can be remotely controlled or automatically controlled, thereby ensuring that it has a large thrust.

[0023] The working process and principle of the slow-drive motor automatic docking device of the utility model are as follows: starting the electric push rod to retract the piston rod of the electric push rod, driving the extension rod to move linearly, and then driving the transmission rod to rotate around the rotating bracket (counterclockwise rotation), so that the transmission rod pushes the transmission bearing to move axially forward, and then the coupling moves axially forward, thereby completing the closing of the coupling (that is, the coupling is connected to the driven shaft); conversely, starting the electric push rod to extend the piston rod of the electric push rod, driving the extension rod to move linearly, and then driving the transmission rod to rotate around the rotating bracket (clockwise rotation), so that the transmission rod pushes the transmission bearing to move axially backward, and then the coupling moves axially backward, thereby completing the separation of the coupling (that is, the coupling is separated from the driven shaft).

[0024] The utility model has the following beneficial effects:

[0025] (1) The automatic docking device for the slow-drive motor of the utility model is electrically driven by an electric push rod connected to an external power source. Through mechanical transmission, the closing process of the slow-drive motor coupling is ensured to be smooth, and the automatic closing of the slow-drive motor coupling of the calcining furnace is realized, so that the closing process of the slow-drive motor coupling does not require human intervention, thus meeting the requirements of device automation;

[0026] (2) The slow-drive motor automatic docking device of the utility model is electrically driven by an electric push rod. While ensuring a large thrust, the working space is reduced as much as possible. Compared with the process of closing the coupling using a manual push rod, the automatic docking device requires a smaller working space;

[0027] (3) The automatic docking device for the slow-drive motor of the utility model is based on the structural transformation of the existing installation base of the slow-drive motor, which has no impact on the overall layout of the calcining furnace and has a simple structure;

[0028] (4) The automatic docking device for slow-drive motors of the utility model can realize remote control of closing the coupling without the need for on-site operation by personnel, thus reducing production safety hazards. For example, in the case of an automatic docking device for slow-drive motors of light and heavy ash furnaces, when it is necessary to connect the slow-drive motors with the light and heavy ash boilers, press the electric push rod retraction button, the piston rod retracts, and drives the transmission rod to rotate. The separate coupling is set as a slope. When the coupling is connected, the torque can be transmitted. According to the pre-adjusted position, the piston rod retracts and stops moving after the limit is reached. The electric push rod can have its own limit device, which is a sensor that can be adjusted to the corresponding working position during the debugging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein:

[0030] Figure 1 It is a schematic diagram of the overall structure of the slow-drive motor automatic docking device of the utility model;

[0031] Figure 2 It is a top view of the automatic docking device of the slow-drive motor of the utility model;

[0032] Figure 3 This is a schematic diagram of the connection method of the medium and slow transmission motor, coupling, transmission bearing and transmission rod of the utility model;

[0033] Figure 4 Schematic diagram of the transmission rod, where (a) is the front view and (b) is the top view.

[0034] Among them, 1 is a slow transmission motor, 2 is a coupling, 3 is a transmission bearing, 4 is a transmission rod, 401 is a first double rod end, 402 is a second double rod end, 5 is a rotating bracket, 6 is an extension rod, 7 is a connecting pin, 8 is an electric push rod, 9 is a push rod bracket, and 10 is a base. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the two components. The terms "upper", "middle", "outer", "inner", "lower", "all around", etc. indicate orientation or positional relationship, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0037] like Figure 1-2As shown, the utility model is an automatic docking device for a slow transmission motor, and the automatic docking device comprises: an electric push rod 8, an extension rod 6 and a transmission rod 4, wherein the electric push rod 8 is arranged on one side of the axial direction of the slow transmission motor, and a retractable piston rod is arranged at the end of the electric push rod 8, and the extension rod 6 and the electric push rod 8 are arranged on the same side of the axial direction of the slow transmission motor, one end of the extension rod 6 is matched with the piston rod, and the other end is rotatably matched with the transmission rod 4, the other end of the transmission rod 4 is rotatably matched with the transmission bearing 3 sleeved on the outside of the coupling 2 installed at the end of the slow transmission motor, and the other end of the coupling 2 is matched with the driven shaft (that is, the extended shaft of the driven device, not shown in the figure), and the extension of the piston rod drives the extension rod 6 to move linearly, and then drives the transmission rod 4 to rotate, so that the transmission rod 4 pushes the transmission bearing 3 to move axially, and then drives the coupling 2 to move axially, thereby realizing the separation and matching of the coupling 2 and the driven shaft.

[0038] In a preferred embodiment, the transmission rod 4 is shaped like a harpoon as a whole, and the transmission rod 4 includes a first double rod end and a second double rod end which are connected to each other (integrally formed or welded), the distance between the upper and lower rods of the second double rod end (the distance between the upper and lower rods of the second double rod end is equal to or slightly larger than the diameter of the outer ring of the transmission bearing) is greater than the distance between the upper and lower rods of the first double rod end (the distance between the upper and lower rods of the first double rod end is equal to or slightly larger than the diameter of the extension rod), the upper and lower rod ends of the first double rod end are both provided with waist-shaped holes (preferably symmetrically), the upper and lower rod ends of the second double rod end are both provided with waist-shaped grooves (preferably symmetrically), and the top and bottom ends of the outer ring surface of the transmission bearing 3 are both provided with convex rods, and the convex rods are respectively rotatably connected with the waist-shaped grooves.

[0039] In another preferred embodiment, the automatic docking device also includes: a connecting pin 7, the first double rod end is connected to the extension rod 6 pin via the connecting pin 7, and the connecting pin 7 passes through the waist-shaped hole opened at the end of the upper rod of the first double rod end, the pin hole opened at the end of the extension rod 6, and the waist-shaped hole opened at the end of the lower rod of the first double rod end in sequence.

[0040] In another preferred embodiment, the piston rod is threadedly connected to one end of the extension rod 6, the end of the piston rod is provided with an external thread, and the other end of the extension rod 6 is provided with an internal thread matching the external thread.

[0041] In another preferred embodiment, the automatic docking device further comprises: a push rod bracket 9 , which is disposed at the bottom of the electric push rod 8 , and the electric push rod 8 is fixedly mounted on the push rod bracket 9 (eg, by bolts).

[0042] In another preferred embodiment, a base 10 is fixedly mounted on the bottom of the slow-drive motor, and the push rod bracket 9 is fixedly mounted on the base 10 (for example, by anchor bolts).

[0043] In another preferred embodiment, the automatic docking device also includes: a rotating bracket 5, which is arranged at the bottom of one end of the second double rod end close to the first double rod end, the bottom of the rotating bracket 5 is fixedly mounted on the base 10, the top of the rotating bracket 5 is rotatably connected to the bottom of the lower rod of the second double rod end, the bottom of the lower rod of the second double rod end is provided with a convex shaft, and the top of the rotating bracket 5 is provided with a groove adapted to the convex shaft.

[0044] Among them, Figure 4 As shown, the piston extension distance of the electric push rod is K times the moving distance of the coupling, where K is the transmission ratio of the transmission rod, K=A / B, where A is the vertical distance from the waist-shaped hole to the center of the rotating bracket, and B is the vertical distance from the center of the rotating bracket to the waist-shaped groove.

[0045] In another preferred embodiment, the coupling 2 is provided with a stepped groove near the flat end, and the transmission bearing 3 is installed in the stepped groove. Figure 3 As shown, the slow transmission motor 1 and the coupling 2 are connected by a pin shaft, and the transmission bearing 3 is inserted into the coupling 2 to realize the transmission of the axial front and rear force of the coupling. The transmission bearing 3 extends a short rod in the up and down directions, and the second double rod end of the transmission rod is inserted into the short rod to transmit torque.

[0046] In another preferred embodiment, in the above-mentioned automatic docking device, the slow-drive motor 1 is a slow-drive motor used for a light ash furnace and a heavy ash furnace. Example 1

[0047] like Figure 1-2As shown, this embodiment is suitable for the slow-drive motor automatic docking device of light and heavy ash furnaces, and the automatic docking device includes: an electric push rod 8, an extension rod 6 and a transmission rod 4, wherein the electric push rod 8 is a driving member of the automatic docking device, the extension rod 6 and the transmission rod 4 are driven members of the automatic docking device and are used for mechanical transmission, the electric push rod 8 is arranged on the left side of the axial direction of the slow-drive motor 1, and a retractable piston rod is arranged at the end of the electric push rod 8, the extension rod 6 is arranged on the left side of the axial direction of the slow-drive motor 1, one end of the extension rod 6 is threadedly connected to the piston rod, and the end of the piston rod is provided with an external screw The other end of the extension rod 6 is provided with an internal thread matched with the external thread, the other end of the extension rod 6 is rotatably connected with the transmission rod 4, the other end of the transmission rod 4 is rotatably connected with the transmission bearing 3 sleeved on the outside of the coupling 2 installed at the end of the slow transmission motor 1, and the other end of the coupling 2 is connected with the driven shaft (not shown in the figure), and the extension of the piston rod drives the extension rod 6 to move linearly, and then drives the transmission rod 4 to rotate, so that the transmission rod 4 pushes the transmission bearing 3 to move axially, and then drives the coupling 2 to move axially, thereby realizing the separation and cooperation between the coupling 2 and the driven shaft.

[0048] The coupling is a separable coupling, and the coupling and the slow transmission motor are detachably connected and fixed by a pin shaft.

[0049] Among them, the transmission rod 4 is shaped like a harpoon as a whole, and the transmission rod 4 includes a first double rod end and a second double rod end that are integrally formed. The distance between the upper and lower rods of the second double rod end (the distance between the upper and lower rods of the second double rod end is equal to or slightly larger than the diameter of the outer ring of the transmission bearing 3) is greater than the distance between the upper and lower rods of the first double rod end (the distance between the upper and lower rods of the first double rod end is equal to or slightly larger than the diameter of the extension rod 6). The upper and lower rod ends of the first double rod end are symmetrically provided with waist-shaped holes, and the upper and lower rod ends of the second double rod end are symmetrically provided with waist-shaped grooves. The top and bottom ends of the outer ring surface of the transmission bearing 3 are both provided with convex rods, and the convex rods at the top and the bottom are respectively rotatably connected with the waist-shaped grooves opened at the upper and lower rod ends of the second double rod end.

[0050] Among them, the automatic docking device also includes: a connecting pin 7, the first double rod end is connected to the extension rod 6 pin through the connecting pin 7, a pin hole is opened at the end of the extension rod 6, the connecting pin 7 passes through the waist-shaped hole opened at the end of the upper rod of the first double rod end, the pin hole opened at the end of the extension rod 6 and the waist-shaped hole opened at the end of the lower rod of the first double rod end in sequence, thereby realizing the transmission of motion.

[0051] The automatic docking device further comprises: a push rod bracket 9, which is arranged at the bottom of the electric push rod 8 and is used to fix the electric push rod 8, and the electric push rod 8 is fixedly installed on the push rod bracket 9 by anchor bolts.

[0052] A base 10 is fixedly mounted on the bottom of the slow transmission motor 1 , and a push rod bracket 9 is fixedly mounted on the base 10 by anchor bolts.

[0053] Among them, the automatic docking device also includes: a rotating bracket 5, which is used for rotational transmission, so that the transmission rod 4 rotates relatively around the rotating bracket 5 during the transmission process. The rotating bracket 5 is cylindrical and is arranged at the bottom of one end of the second double rod end close to the first double rod end. The bottom of the rotating bracket 5 is fixedly installed on the base 10 by anchor bolts. The top of the rotating bracket 5 is rotatably connected to the bottom of the lower rod of the second double rod end. The bottom of the lower rod of the second double rod end is provided with a convex shaft, and the top of the rotating bracket 5 is provided with a groove adapted to the convex shaft.

[0054] The piston extension distance of the electric push rod is K times the moving distance of the coupling, where K is the transmission ratio of the transmission rod, K=A / B, where A is the vertical distance from the waist-shaped hole to the center of the rotating bracket, and B is the vertical distance from the center of the rotating bracket to the waist-shaped groove.

[0055] The coupling 2 has a stepped groove near the flat end, and the transmission bearing 3 is installed in the stepped groove. Figure 3 As shown, the slow transmission motor 1 and the coupling 2 are connected by a pin shaft, and the transmission bearing 3 is inserted into the coupling 2 to realize the transmission of the axial front and rear force of the coupling. The transmission bearing 3 extends a short rod in the up and down directions, and the second double rod end of the transmission rod is inserted into the short rod to transmit torque.

[0056] The working process and principle are as follows: start the electric push rod 8 to retract the piston rod of the electric push rod 8, drive the extension rod 6 to move linearly, and then drive the transmission rod 4 to rotate around the rotating bracket 5 (counterclockwise rotation), so that the transmission rod 4 pushes the transmission bearing 3 to move axially forward, and then the coupling 2 moves axially forward, thereby completing the closing of the coupling 2; conversely, start the electric push rod 8 to extend the piston rod of the electric push rod 8, drive the extension rod 6 to move linearly, and then drive the transmission rod 4 to rotate around the rotating bracket 5 (clockwise rotation), so that the transmission rod 4 pushes the transmission bearing 3 to move axially backward, and then the coupling 2 moves axially backward, thereby completing the separation of the coupling 2.

[0057] In the case of the automatic docking device for the slow transmission motor of the light and heavy ash furnace, when the slow transmission motor needs to be connected with the light and heavy ash boiler, press the electric push rod retraction button, the piston rod retracts, drives the transmission rod to rotate, and the separate coupling is set as a slope. When the coupling is connected, the torque can be transmitted. According to the position debugged in advance, the piston rod retracts and stops moving after the limit. The electric push rod can be equipped with a limit device, which is a sensor, and can be adjusted to the corresponding working position during the debugging process.

[0058] As can be seen from Example 1, this embodiment is suitable for the slow-drive motor automatic docking device of light and heavy ash furnaces, and adopts an electric push rod for electric drive. Through the form of mechanical transmission, the automatic closing and opening of the slow-drive motor coupling is realized, which greatly reduces the safety hazards in production work and reduces the required working space. In addition, the automatic docking device relies on the slow-drive motor mounting base for structural transformation, has no effect on the overall layout of the calcining furnace, and has a simple structure.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A slow-drive motor automatic docking device, characterized in that: The automatic docking device comprises: an electric push rod (8), an extension rod (6) and a transmission rod (4), wherein the electric push rod (8) is arranged on one side of the axial direction of the slow transmission motor, a retractable piston rod is arranged at the end of the electric push rod (8), the extension rod (6) and the electric push rod (8) are arranged on the same side of the axial direction of the slow transmission motor, one end of the extension rod (6) is connected to the piston rod, and the other end is connected to the transmission rod (4) in a rotational manner, the other end of the transmission rod (4) is connected to a transmission bearing (3) sleeved on the outside of a coupling (2) installed at the end of the slow transmission motor in a rotational manner, and the other end of the coupling (2) is connected to a driven shaft in a rotational manner, the piston rod is retracted to drive the extension rod (6) to move linearly, and then drives the transmission rod (4) to rotate, so that the transmission rod (4) pushes the transmission bearing (3) to move axially, and then drives the coupling (2) to move axially, thereby realizing the separation and engagement of the coupling (2) and the driven shaft.

2. The automatic docking device according to claim 1, characterized in that: The transmission rod (4) is shaped like a harpoon as a whole. The transmission rod (4) comprises a first double rod end and a second double rod end which are connected to each other. The distance between the upper and lower rods of the second double rod end is greater than the distance between the upper and lower rods of the first double rod end. The distance between the upper and lower rods of the second double rod end is equal to or slightly greater than the diameter of the outer ring of the transmission bearing (3). The distance between the upper and lower rods of the first double rod end is equal to or slightly greater than the diameter of the extension rod (6). The upper and lower rod ends of the first double rod end are both provided with waist-shaped holes. The upper and lower rod ends of the second double rod end are both provided with waist-shaped grooves. The top and bottom ends of the outer ring surface of the transmission bearing (3) are both provided with convex rods. The convex rods are respectively rotatably connected with the waist-shaped grooves.

3. The automatic docking device according to claim 2, characterized in that: The automatic docking device further comprises: a connecting pin (7), the first double rod end being connected to the extension rod (6) pin via the connecting pin (7), a pin hole being provided at the end of the extension rod (6), the connecting pin (7) sequentially passing through the waist-shaped hole provided at the end of the upper rod of the first double rod end, the pin hole provided at the end of the extension rod (6), and the waist-shaped hole provided at the end of the lower rod of the first double rod end.

4. The automatic docking device according to claim 3, characterized in that: The piston rod is threadedly connected to one end of the extension rod (6); the end of the piston rod is provided with an external thread, and the other end of the extension rod (6) is provided with an internal thread matching the external thread.

5. The automatic docking device according to any one of claims 2 to 4, characterized in that: The automatic docking device further comprises: a push rod bracket (9), the push rod bracket (9) being arranged at the bottom of the electric push rod (8), and the electric push rod (8) being fixedly mounted on the push rod bracket (9).

6. The automatic docking device according to claim 5, characterized in that: A base (10) is fixedly mounted on the bottom of the slow transmission motor, and a push rod bracket (9) is fixedly mounted on the base (10).

7. The automatic docking device according to claim 6, characterized in that: The automatic docking device further comprises: a rotating bracket (5), the rotating bracket (5) being arranged at the bottom of one end of the second double rod end close to the first double rod end, the bottom of the rotating bracket (5) being fixedly mounted on the base (10), the top of the rotating bracket (5) being rotatably connected to the bottom of the lower rod of the second double rod end, the bottom of the lower rod of the second double rod end being provided with a convex shaft, and the top of the rotating bracket (5) being provided with a groove matched with the convex shaft.

8. The automatic docking device according to claim 7, characterized in that: A stepped groove is provided near the flat end of the coupling (2), and a transmission bearing (3) is installed in the stepped groove via a pin connection. The slow transmission motor (1) and the coupling (2) are connected via a pin, and the transmission bearing (3) is inserted into the coupling (2) to achieve transmission of the axial front and rear force of the coupling. A short rod extends out of the transmission bearing (3) in the up and down directions, and the second double rod end of the transmission rod is inserted into the short rod to transmit torque.

9. The automatic docking device according to claim 7, characterized in that: The piston extension distance of the electric push rod is K times the moving distance of the coupling, where K is the transmission ratio of the transmission rod, K=A / B, where A is the vertical distance from the waist-shaped hole to the center of the rotating bracket, and B is the vertical distance from the center of the rotating bracket to the waist-shaped groove.

10. An automatic docking system, characterized in that: The invention comprises a slow-drive motor and the automatic docking device according to any one of claims 1 to 9.

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