Rail lift, transfer system and rail transfer method

Abstract

The present application provides a track lifter, a transfer system and a track transfer method. The track lifter comprises a frame-shaped support, a lifting device arranged in the support, a transfer track rotatably arranged at the bottom of the lifting device, a first driving device arranged on the lifting device and used for driving the transfer track to rotate so that the transfer track can be docked to different directions, a second driving device arranged on the support and used for driving the lifting device to move longitudinally so that the transfer track can transfer the electric displacement machine on the track between tracks at different height ranges, and a locking mechanism arranged on one side of the transfer track and used for locking the electric displacement machine entering the transfer track. The track lifter provided by the present application can transfer the electric displacement machine between different heights and different directions.

Description

Technical Field

[0001] This invention relates to the field of rehabilitation medical device technology, specifically to a rail lift, a transfer system, and a rail transfer method. Background Technology

[0002] In the field of rehabilitation within the medical system, the use of ceiling-mounted transfer systems and suspended electric transfer machines provides a complete solution for patients with limited mobility and the elderly. Widely used in hospitals and patients' homes, these systems help caregivers easily transport patients from their beds to bathrooms, toilets, wheelchairs, or other locations. They effectively help elderly and frail patients reduce obstacles, restore function, improve their quality of life, and reintegrate into society. They also help those who work in nursing year-round to reduce their workload and the risk of secondary injuries during transport and training.

[0003] However, the tracks used in the ceiling-mounted patient transfer system connect all the locations where patients need to be transferred. Therefore, the system consists of multiple tracks, especially those not aligned in a straight line or at the same height. During use, when a patient needs to be transferred from the ward to the rehabilitation hall for training, the ceiling height of the rehabilitation hall in some hospitals is higher than that of the ward ceiling, preventing the electric transfer machine in the ward from directly reaching the rehabilitation hall. Some hospitals have to install another electric transfer machine system in the rehabilitation hall to transfer patients. During the transfer, the patient's vest and slings need to be removed from the electric transfer machine in the ward and then hung on the electric transfer machine in the rehabilitation hall. This process requires the coordinated efforts of multiple nursing staff. If the transfer is not performed carefully, the patient may fall and suffer secondary injuries, and it also puts significant psychological stress on the nursing staff. Summary of the Invention

[0004] In view of the above-mentioned technical defects, the present invention provides a rail lift, a transfer system and a transfer method for transferring electric transfer machines between different heights and different directions.

[0005] To solve the above-mentioned technical problems, the objective of this invention is achieved through the following technical solution: the rail lift includes:

[0006] A frame-shaped support;

[0007] A lifting device is provided inside the bracket;

[0008] The transfer track is rotatably located at the bottom of the lifting device;

[0009] A first driving device is mounted on the lifting device and is used to drive the transfer track to rotate so that the transfer track can be docked to different directions;

[0010] The second driving device is mounted on the support and is used to drive the lifting device to move longitudinally so that the transfer track can transfer the electric transfer machine on the track between tracks with different height ranges.

[0011] A locking mechanism, located on one side of the transfer track, is used to lock the electric transfer machine that enters the transfer track.

[0012] Furthermore, the lifting device includes a lifting plate and a turntable rotatably disposed in the middle of the lifting plate, the transfer track is fixedly disposed at the bottom of the turntable, and the first driving device is used to drive the turntable to rotate.

[0013] Furthermore, the first driving device includes a rack disposed on the lifting plate and extending circumferentially, and a first motor fixedly disposed on the turntable. The first motor is connected to the rack via a first gear.

[0014] Furthermore, the locking mechanism includes a second motor mounted on the turntable, an eccentric wheel connected to the second motor, and a pin plate connected to the eccentric wheel. The pin plate has at least one pin protruding from it and inserted into the transfer track. The transfer track has first sensors on both sides of the pin plate for sensing the position of the electric transfer machine.

[0015] Furthermore, the lifting device also includes at least two sets of transfer rails, each set of transfer rails including two symmetrically arranged transfer rails for connecting to the two ends of the transfer rail respectively; one side of the transfer rail is provided with a limit lock for stopping the electric transfer machine on the rail.

[0016] Furthermore, the limiting lock includes a lock body, a swing arm rotatably mounted on the lock body, and a drive member slidably mounted inside the lock body. A spring is provided between the drive member and the lock body so that one end of the drive member extends outward from the lock body and the transfer track. The movable end of the swing arm extends out of the lock body and inserts into the transfer track to stop the electric shifting machine on the track. The drive member is provided with a guide groove, and the middle of the swing arm is provided with a positioning post placed in the guide groove. When the drive member is forcefully retracted into the lock body, the positioning post slides in the guide groove and drives the movable end of the swing arm to retract back into the lock body.

[0017] Furthermore, a limit switch is provided on both sides of one end of the transfer track, and a swing rod is rotatably provided on the turntable. The movable end of the swing rod is provided with a stop part that stops one side of the transfer track, and the two sides of the swing rod are provided with contact parts that abut against the limit switches on both sides of the transfer track during its swing.

[0018] Furthermore, the second driving device includes at least two lead screws mounted on the bracket and extending longitudinally, multiple guide columns arranged parallel to the lead screws, and a third motor for driving the lead screws to rotate. The lifting plate is fixed to the lead screws by lead screw nuts, and the lifting plate is mounted on the guide columns by linear bearings.

[0019] In a second aspect, the present invention also provides a transfer system, including a rail lift as described in any of the first aspects, and further including at least two external rails arranged around the rail lift at the same or different heights, and a plurality of electric transfer machines movable along the external rails. One end of each external rail is fixed to the bracket so that the transfer rail can engage with any external rail during rotation and lifting. Each external rail is provided with an electronic lock for stopping the electric transfer machine, and a second sensor for alignment is provided between the transfer rail and the external rails.

[0020] Thirdly, the present invention also provides a rail transfer method, which uses the transfer system described in the second aspect for transfer, the rail transfer method comprising the following steps:

[0021] S1. When one of the electric shifters on the external track moves to the position of the electronic lock, it is stopped by the electronic lock and kept in place.

[0022] S2. Determine whether there is an electric shifter in the transfer track. If not, drive the lifting device to descend or rise to the height of the external track and connect the transfer track with the external track.

[0023] S3. Then open the electronic lock, allowing the electric transfer machine to continue moving into the transfer track and be locked by the locking mechanism;

[0024] S4. When the electric transfer machine needs to move to external tracks at different heights but in the same or different directions, the driving lifting device lowers or raises to the height of the external track to be reached, and aligns the transfer track with the external track to be reached. Then, the locking mechanism is released, allowing the electric transfer machine to continue moving to the external track at that height, completing the transfer between tracks at different heights. When the electric transfer machine needs to move to external tracks at the same height but in different directions, the driving transfer track rotates and aligns with the external track to be reached. Then, the locking mechanism is released, allowing the electric transfer machine to continue moving to the aligned external track, completing the transfer between tracks at the same height.

[0025] The present invention has the following beneficial effects:

[0026] The rail lift of this invention, firstly, is driven by a second drive device, enabling the lifting device and transfer rail to move up and down within the height range of the support. This allows the transfer rail in the rail lift to connect with rails at different heights. When transfer is required, the electric transfer machine at a certain height is first moved into the transfer rail of the rail lift. Then, by controlling its lifting and lowering, the transfer rail is connected with a rail at another height. The electroplating transfer machine then enters the rail lift and moves to the rail at the target height, completing the transfer operation between rails at different heights. Furthermore, the transfer rail can rotate to any angle to connect with rails at different angles, completing the transfer of rails in different directions. A locking mechanism for locking the electric transfer machine is also provided on the turntable, ensuring that the electric transfer machine entering the transfer rail will not slip during lifting and lowering, avoiding safety issues. A limit lock is also provided on the transfer rail to further prevent the electric transfer machine from slipping off the rail, which would cause safety problems. This limit lock can only be opened after the transfer rail is properly connected with the external rail.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and will become apparent from the description or may be learned by practice of the invention. Attached Figure Description

[0028] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the rail lift in the embodiment;

[0030] Figure 2 This is a schematic diagram showing another perspective of the rail lift in the embodiment;

[0031] Figure 3 This is a bottom view of the rail lift in the embodiment;

[0032] Figure 4 This is a bottom view of the rail lift in the embodiment after the lifting device has been removed;

[0033] Figure 5 This is a schematic diagram of the rail lift after the lifting device has been removed in the embodiment;

[0034] Figure 6 This is a schematic diagram of the lifting device in the embodiment;

[0035] Figure 7This is a bottom view of the lifting device in the embodiment;

[0036] Figure 8 for Figure 7 Enlarged diagram of A in the middle;

[0037] Figure 9 for Figure 6 A schematic diagram after removing the transfer track;

[0038] Figure 10 for Figure 9 Enlarged diagram of B in the diagram;

[0039] Figure 11 This is a schematic diagram of the transfer track and limit lock in the embodiment;

[0040] Figure 12 for Figure 11 A schematic diagram after the outer shell of the limit lock has been removed;

[0041] Figure 13 This is a schematic diagram of the electric transfer machine in the embodiment;

[0042] Figure 14 This is a schematic diagram of the transfer system in Example 2;

[0043] Figure 15 This is a bottom view of the transfer system in Example 2;

[0044] Figure 16 This is a schematic diagram of the external track and the electric shifting machine in Example 2;

[0045] Figure 17 This is a schematic diagram of the external track and the electric transfer machine from another perspective in Example 2. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0048] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0049] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0050] Example 1

[0051] like Figure 1-13 As shown in the figure, the rail lift 100 shown in this embodiment includes a frame-shaped support 1, a lifting device, a transfer rail 2, a first drive device, a second drive device, and a locking mechanism.

[0052] The bracket 1 includes a top plate 10 and four support legs 11 located at the four corners of the bottom of the top plate 10, so as to form an opening 12 between adjacent support legs for the electric transfer machine to enter the bracket. That is, the bracket has four openings arranged in a cross shape. Of course, the number of openings can be changed by changing the number of support legs according to actual needs and the actual shape and size of the bracket. For example, if there are only three support legs arranged in a triangular shape, three openings are formed. If there are five support legs arranged in a pentagonal shape, five openings are formed.

[0053] The lifting device includes a lifting plate 20 housed within a support 1 and a turntable 21 rotatably positioned in the center of the lifting plate 20. A transfer track 2 is fixedly mounted on the bottom of the turntable 21, allowing it to rotate with the turntable. A first driving device drives the turntable to rotate, enabling both the turntable and the transfer track to rotate, allowing the transfer track 2 to connect to external tracks in different directions. In this embodiment, because the support has four openings, the two ends of the transfer track can connect to the front-to-back symmetrical and left-to-right symmetrical openings respectively. Thus, when the transfer track needs to connect to external tracks in different directions, only the turntable needs to be controlled to rotate each time. The rotation process is easy to control and set. For example, if it is initially connected to the front-to-back direction, it can be set to rotate 90 degrees counterclockwise or clockwise to connect to the left-to-right direction. When it needs to reconnect to the front-to-back direction, it can be set to continue rotating 90 degrees in the same direction or the opposite direction. Generally, it rotates in the opposite direction, which simplifies the rotation control and process. Of course, when other numbers of openings are used on the support, the angle of rotation of the turntable can also be set according to the angle between the two tracks.

[0054] Preferably, the first driving device includes a rack 22 disposed on the lifting plate 20 and extending circumferentially, and a first motor 23 fixedly disposed on the turntable 21. The first motor 23 is connected to the rack 22 through a first gear 24, so that the first gear can rotate circumferentially along the rack when the rack is stationary. The rack can be a complete ring or an arc. When it is ring-shaped, the transfer track can rotate 360 ​​degrees. When it is arc-shaped, the transfer track can rotate back and forth within the arc range of the rack. In this embodiment, the rack is arc-shaped, and the arc center angle is greater than or equal to 90 degrees. The motor is a servo motor, which facilitates the control of the rotation angle of the turntable.

[0055] Preferably, the lifting device also includes two sets of transfer rails. Each set of transfer rails includes two symmetrically arranged transfer rails 25 for connecting to both ends of the transfer rail. That is, the four transfer rails are arranged in a cross shape in the middle of the four openings of the bracket to directly connect to the external rail. One side of the transfer rail 25 is provided with a limit lock 3 for stopping the electric transfer machine on the rail to prevent the electric transfer machine that has entered the bracket from sliding outward or forward from another opening for any reason.

[0056] Preferably, the limit lock 3 is a mechanical lock. It requires the height of the lifting device to be at the same level as the external track to be connected, and the transfer track to be connected to the external track, before it can be unlocked using the structure on the external track. This allows the electric transfer machine to move onto the external track, improving safety. The limit lock 3 includes a lock body 31, a swing arm 32 rotatably mounted on the lock body 31 at one end, and a drive member 33 slidably mounted within the lock body 31 and driving the other end of the swing arm 32. A spring (not shown in the figure) is provided between the drive member 33 and the lock body 31, so that one end of the drive member 33 extends outward from the lock body 31 and the transfer track. The movable end of the swing arm 32 extends out of the lock body and inserts into the transfer track 25 to stop the electric shifting machine on the track. The drive member 33 is provided with a guide groove 35, which extends obliquely from the side near the transfer track to the side away from the transfer track. The middle of the swing arm 32 is provided with a positioning post 36 placed in the guide groove 35. When the drive member 33 is retracted into the lock body by the force applied by the external track, the positioning post 36 slides in the guide groove 35 and drives the movable end of the swing arm 32 to retract into the lock body to release the stop on the electric shifting machine. Of course, the limit lock also includes a shell covering the outside of the lock body.

[0057] Preferably, a limit switch 26 is provided on both sides of one end of the transfer track 2. A swing rod 4 that can swing left and right is provided between the turntable and the transfer track. The movable end of the swing rod 4 is provided with a stop part 41 that stops one side of the transfer track 2. The two sides of the swing rod 4 are provided with contact parts 42 that abut against the limit switches 26 on both sides of the transfer track 2 during its swing. The specific rotation stroke control is as follows: The turntable and the transfer track are driven to rotate synchronously by the first motor. After the stop part on the swing rod contacts the transfer track, the position of the swing rod remains unchanged. At this time, the turntable and the transfer track continue to rotate. Then, after the limit switch on one side of the transfer track contacts the contact part on the swing rod, a trigger signal is generated, and the first motor stops working. At this time, the transfer tracks are just connected front and back. Similarly, when the turntable and the transfer track rotate in opposite directions, the stop part of the swing rod contacts the other transfer track. Then, after the limit switch on the other side of the rotating track contacts the other contact part on the swing rod, the first motor stops working. That is, the transfer track is controlled to rotate back and forth within a 90-degree range.

[0058] Preferably, the locking mechanism includes a second motor 51 mounted on the turntable 21, an eccentric wheel 52 driven by the second motor 51, and a pin plate 53 connected to the eccentric wheel 52. The pin plate 53 has two protruding pins 54 that insert into the transfer track 2. In practical applications, the electric transfer machine 6 moves within the track via two sets of drive wheels 61 positioned at the front and rear of its top. When the electric transfer machine moves to the locking mechanism, the two pins are inserted between the two sets of drive wheels 61 or onto the outside of the two sets of drive wheels, respectively limiting the front and rear sets of drive wheels, thereby locking the electric transfer machine onto the transfer track. This ensures that the electric transfer machine entering the transfer track will not experience any issues during lifting or lowering. Self-sliding to avoid safety issues; of course, in order to determine the position of the electric transfer machine on the transfer track, first sensors 27 for sensing the position of the electric transfer machine 6 are provided on both sides of the pin plate 53 on the transfer track 2. The sensors distributed front and back can correspond one-to-one with the two sets of drive wheels on the electric transfer machine. Only when both front and back sensors detect the drive wheels will the second motor be activated to insert the pin into the transfer track to lock the electric transfer machine; in this embodiment, the first sensor can be an infrared sensor, and the drive wheels slide inside the track. Therefore, in order to detect the drive wheels, openings are provided through the transfer track at the positions corresponding to the first sensors.

[0059] The movement principle of the electroplating shifting machine on the track mentioned above can be specifically referred to in the previously published patent CN202120376379.1.

[0060] The second drive device includes at least two lead screws 71 mounted on the bracket 1 and extending longitudinally, multiple guide columns 72 arranged parallel to the lead screws 71, and a third motor 73 that drives the lead screws 71 to rotate. Specifically, the two lead screws 71 extend along two diagonally arranged support legs 11, and a guide column 72 is provided on the inner side of each support leg 11. The lifting plate 20 is fixed to the lead screw 71 by the lead screw nut 74, so that when the lead screw rotates, the lead screw nut and the lifting plate move up and down synchronously. The lifting plate 20 is mounted on the guide column 72 by a linear bearing 75, thereby guiding the up and down movement of the lifting plate to make the movement of the lifting plate more stable and smoother.

[0061] Preferably, a shock-absorbing rod 8 is provided on the inner side of each support foot to dampen the lifting device and prevent the lifting device from being damaged by impact.

[0062] Example 2

[0063] like Figure 1-17 As shown in this embodiment, a transfer system includes a rail lift 100 as described in Embodiment 1, four external rails 200 arranged at different heights around the rail lift 100, and several electric transfer machines 6 that can move along the external rails 200. The four external rails are located in the middle of one of the openings of the support frame and are used to connect with the transfer rail. The external rails extend outward within the space where the rails need to be laid to form a rail system. One end of the external rail 200 is fixed to the support frame 1 by a crossbeam 400 so that the transfer rail can connect with any external rail during rotation and lifting. Each external rail is provided with an electronic lock 500 to stop the electric transfer machine 6 from entering the rail lift. A second sensor 300 for alignment is provided between the transfer rail 25 and the external rail 200. After the second sensor in both rails identifies the connection, the transfer rail 25 and the external rail 200 are aligned. Of course, the height of the four external rails can also be all at the same height or partially at the same height.

[0064] Preferably, a pressing member 201 is provided on one side of the external rail 200, located above or below the driving member, and both the upper and lower surfaces of the pressing member are provided with inclined surfaces. When the lifting device moves up and down within the bracket, the driving member in the limit lock 3 will cooperate with the inclined surface on the pressing member at one end, and the pressing member will be used to move the driving member into the lock body. In this way, after the transfer rail and the external rail are aligned, the limit lock in the transfer rail is opened, achieving the purpose of alignment and unlocking at the same time. The principle of mechanical unlocking makes the transfer process safer and more convenient.

[0065] Preferably, the working principle of this electronic lock is the same as that of the locking mechanism described in the embodiment, which uses a motor to control an eccentric wheel to drive the pin on the pin plate to insert into or leave the track. However, this electronic lock only needs to stop the forward direction of the electric transfer machine, so it only needs to use one pin 54. In addition, the electronic lock is also equipped with two third sensors 501 for detecting and identifying the position of the electric transfer machine. The two third sensors are set along the length of the external track, so the movement direction of the electric transfer machine on the external track can be determined by the order of recognition of the two third sensors, so as to avoid conflicts between multiple electric transfer machines during the transfer process.

[0066] Example 3

[0067] This embodiment illustrates a rail transfer method that uses the transfer system described in Embodiment 2 for transfer, and specifically includes the following steps:

[0068] S1. Number the four external tracks in clockwise order as track 1, track 2, track 3 and track 4;

[0069] S2. When the electric transfer machine on track 1 needs to be moved to track 4, it first moves to the position of the electronic lock and is stopped by the electronic lock to keep it in place. The operator issues the transfer command through the external controller.

[0070] S3. After receiving the instruction, the rail hoist performs the following judgment:

[0071] A. Determine whether there is an electric transfer machine on the transfer track using the first sensor;

[0072] B. The current position of Track 1;

[0073] C. The current location of the transfer track;

[0074] D. Whether there is an electric shifter at the waiting position of all tracks. The waiting position is the electronic locking position. The third sensor is used to determine whether there is an electric shifter at the waiting position of the external track.

[0075] S4. The processing results are as follows:

[0076] A. When at least two waiting positions on the tracks and an electric transfer machine is detected in the transfer track, the track lift will issue an alarm signal, requesting the operator to come and handle the situation. The electric transfer machines on each track will be transferred to the target track one by one through manual operation control.

[0077] B. When it is detected that only track 1 has an electric shifter, the track lift assumes that the transfer command was issued by the electric shifter on track 1. Then, based on the judgment of the position of the transfer track and the position of track 1, it automatically adjusts the position of the transfer track by means of lifting and lowering to connect the transfer track with track 1. When the connection is completed, the electronic lock on track 1 is opened. After confirming that the electronic lock is open, an audible and visual signal that passage is possible can also be emitted.

[0078] After receiving the audible and visual signal that passage is possible, the operator of the electric transfer machine on track S5 and track 1 operates the electric transfer machine to leave track 1 and enter the transfer track. Then, after both first sensors identify the electric transfer machine, the locking mechanism locks it and closes the electronic lock on track 1.

[0079] S6. If no other electric transfer machine is detected on track 4 and the electronic lock on track 4 is closed, the lifting device inside the track lift will be raised and / or rotated (this operation depends on the position of track 4). When the height of track 4 is different from that of track 1, the transfer track needs to be raised, lowered, and rotated simultaneously to align with track 4. Once alignment is complete, the electronic lock on track 4 and the locking mechanism on the transfer track will be opened. After confirming that the electronic lock is open, an audible and visual signal indicating passage will be emitted to control the electric transfer machine to move into track 4 and complete the transfer operation. After the electric transfer machine moves forward and moves out of the third sensor, the electronic lock on track 4 will be closed, while the lifting device will remain at the position aligned with track 4, awaiting the next transfer command. Similarly, when the height of track 4 is the same as that of track 1, only the transfer track needs to be rotated, and no raising or lowering operation is required.

[0080] Preferably, when the lifting device is at the height of a certain track, if the operator accidentally sends a command to move to the same track, the track lift will issue an alarm with sound and light upon receiving the command, alerting the operator.

[0081] Preferably, if the equipment experiences a sudden power outage and subsequent power restoration, the equipment will remain in the state it was in when the power was off. The operator will need to reset the lifting device. The rail lift will detect the position of all relevant moving parts. If no electric shifting mechanism is detected on any of the external rails and transfer rails, all moving parts will be reset to their initial state, i.e., all electronic locks on the external rails will be closed, the locking mechanism on the transfer rail will be open, the lifting device will be at its origin, and the transfer rail will correspond to the highest or lowest external rail.

[0082] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention; therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A rail hoist, characterized in that, include: A frame-shaped support; A lifting device is provided inside the bracket; The transfer track is rotatably located at the bottom of the lifting device; A first driving device is mounted on the lifting device and is used to drive the transfer track to rotate so that the transfer track can be docked to different directions; The second driving device is mounted on the support and is used to drive the lifting device to move longitudinally so that the transfer track can transfer the electric transfer machine on the track between tracks with different height ranges. A locking mechanism, located on one side of the transfer track, is used to lock the electric transfer machine that enters the transfer track; The lifting device includes a lifting plate and a turntable rotatably disposed in the middle of the lifting plate. The transfer track is fixedly disposed at the bottom of the turntable. The first driving device is used to drive the turntable to rotate. The first driving device includes a rack disposed on the lifting plate and extending circumferentially, and a first motor fixedly disposed on the turntable. The first motor is connected to the rack via a first gear. The locking mechanism includes a second motor mounted on a turntable, an eccentric wheel connected to the second motor, and a pin plate connected to the eccentric wheel. At least one pin protrudes from the pin plate and is inserted into the transfer track. The transfer track is provided with first sensors on both sides of the pin plate for sensing the position of the electric transfer machine.

2. The rail hoist according to claim 1, characterized in that, The lifting device also includes at least two sets of transfer rails, each set of transfer rails including two symmetrically arranged transfer rails for connecting to the two ends of the transfer rail respectively; one side of the transfer rail is provided with a limit lock for stopping the electric transfer machine on the rail.

3. The rail lift according to claim 2, characterized in that, The limit lock includes a lock body, a swing arm rotatably mounted on the lock body, and a drive member slidably mounted inside the lock body. A spring is provided between the drive member and the lock body so that one end of the drive member extends outward from the lock body and the transfer track. The movable end of the swing arm extends out of the lock body and is inserted into the transfer track to stop the electric shifter on the track. The drive unit is provided with a guide groove, and the middle of the swing arm is provided with a positioning post placed in the guide groove. When the drive unit is subjected to force and retracts into the lock body, the positioning post slides in the guide groove and drives the movable end of the swing arm to retract back into the lock body.

4. The rail hoist according to claim 3, characterized in that: A limit switch is provided on both sides of one end of the transfer track. A swing rod is rotatably mounted on the turntable. The movable end of the swing rod is provided with a stop part that stops one side of the transfer track. Both sides of the swing rod are provided with contact parts that abut against the limit switches on both sides of the transfer track during its swing.

5. The rail hoist according to claim 4, characterized in that, The second driving device includes at least two lead screws mounted on the bracket and extending longitudinally, multiple guide columns arranged parallel to the lead screws, and a third motor for driving the lead screws to rotate. The lifting plate is fixed to the lead screws by lead screw nuts, and the lifting plate is mounted on the guide columns by linear bearings.

6. A transfer system, characterized in that, The system includes the rail lift as described in any one of claims 1-5, and further includes at least two external rails arranged around the rail lift at the same or different heights, and a plurality of electric transfer machines that can move along the external rails. One end of each external rail is fixed to the bracket so that the transfer rail can engage with any external rail during rotation and lifting. Each external rail is provided with an electronic lock for stopping the electric transfer machine, and a second sensor for alignment is provided between the transfer rail and the external rails.

7. A rail transfer method, employing the transfer system as described in claim 6, characterized in that, The rail transfer method includes the following steps: S1. When one of the electric shifters on the external track moves to the position of the electronic lock, it is stopped by the electronic lock and kept in place. S2. Determine whether there is an electric shifter in the transfer track. If not, drive the lifting device to descend or rise to the height of the external track and connect the transfer track with the external track. S3. Then open the electronic lock, allowing the electric transfer machine to continue moving into the transfer track and be locked by the locking mechanism; S4. When the electric transfer machine needs to move to external tracks at different heights but in the same or different directions, the driving lifting device lowers or raises to the height of the external track to be reached, and aligns the transfer track with the external track to be reached. Then, the locking mechanism is released, allowing the electric transfer machine to continue moving to the external track at that height, completing the transfer between tracks at different heights. When the electric transfer machine needs to move to external tracks at the same height but in different directions, the driving transfer track rotates and aligns with the external track to be reached. Then, the locking mechanism is released, allowing the electric transfer machine to continue moving to the aligned external track, completing the transfer between tracks at the same height.

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