Transfer connector and lifting mechanism thereof

Abstract

The utility model discloses a transfer connector and a lifting mechanism thereof, and belongs to the technical field of bullet box transfer auxiliary equipment. The first connector comprises a first base frame; the connecting plates are arranged on the two sides of one end of the first base frame. The connecting rod is movably connected with the two connecting plates; and the connecting rod is not in contact with the first base frame. The utility model further provides a lifting mechanism, the lifting mechanism is matched with the transfer connector, the lifting mechanism comprises a guide rail, the side face of the guide rail is provided with an open sliding groove, and the bottom of the guide rail is provided with first rolling wheels; the upper part of the lifting frame is provided with a mounting frame in the chute, and the bottom is provided with a second roller; the tail end of a piston rod of the lifting device is connected with the top of the mounting frame; the side, not provided with the connecting plate, of the first base frame is arranged on the side, away from the guide rail, of the mounting frame. The first base frame is arranged on the lifting frame, and then the connecting plate, the connecting rod and the launching box linkage frame are connected. And the abutting piece is rotated to enable the limiting block to clamp the linkage frame, the launching box is prevented from shaking, and therefore bidirectional transfer of the launching box from the transport vehicle to the garage room is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of auxiliary equipment for missile box transportation, and particularly relates to a transfer connector and its lifting mechanism. Background Technique

[0002] Before missile transportation, the missile is installed in a launch box (launch tube), and then transported to a transport vehicle through a hoisting device for further transportation. Using a hoisting device for transportation requires a relatively broad site and a hoisting device. Specifically, there are relatively large limitations in use, and the operation lacks flexibility. Content of the Utility Model

[0003] The utility model provides a transfer connector and its lifting mechanism to solve the above technical problems.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The transfer connector includes: a first connector, including: a first base frame; connecting plates are respectively arranged on both sides of one end of the first base frame; a connecting rod is movably connected to the two connecting plates; the connecting rod does not contact the first base frame.

[0006] Further, the first connector further includes: a limiting plate arranged on the first base frame, a limiting groove is arranged between the two limiting plates on the same side; a limiting block is arranged in the limiting groove and is movably connected to the limiting plate through a limiting rod; a pressing member is connected to the bottom of the limiting block, and by controlling the length of the pressing member in the limiting block, the size of the included angle between the limiting block and the first base frame can be adjusted; the connecting plate and the limiting plate are respectively arranged at both ends on the same side of the first base frame.

[0007] Further, the connector further includes: a protection pad arranged at both ends of the first base frame; the protection pad is arranged in the area between at least two connecting plates and two limiting blocks.

[0008] Further, the connector further includes: a second connector, including: a second base frame; a transfer plate is respectively arranged on both sides of the second base frame; a bearing rod is arranged on the second base frame on the back side of the transfer plate; when the second connector is in use, the second base frame is placed parallel to the first base frame, so that the transfer plate replaces the limiting block and is inserted into the limiting groove, and is movably connected to the limiting plate through the limiting rod.

[0009] Further, the second connector further includes: a hinged plate is arranged at both ends on the same side of the second base frame opposite to the transfer plate; when the second connector is in use, the hinged plate is located between the two connecting plates, and the connecting rod can connect the hinged plate and the connecting plates.

[0010] The present application further provides a lifting mechanism adapted to the transfer connector of the present invention, including: a guide rail, with an open chute on the side and a first roller at the bottom; a lifting frame, with a mounting frame in the chute at the upper part and a second roller at the bottom; a lifting device, arranged at the bottom of the chute, and the end of its piston rod is connected to the top of the mounting frame; the side of the first base frame without the connecting plate is arranged on the side of the mounting frame away from the guide rail.

[0011] Further, the lifting frame further includes guide wheels arranged on both sides; the guide wheels are in the chute and can slide up and down along its length direction.

[0012] Further, the lifting mechanism further includes: a steering assembly, including: a rotating shaft cylinder, arranged along the length direction of the side of the guide rail without the chute; a rotating shaft, arranged in the rotating shaft cylinder and connected to the first roller at the bottom, so that the orientation of the first roller can be controlled by rotating the rotating shaft; the wheel diameter of the second roller is smaller than that of the first roller, and the bottoms of both are on the same horizontal plane.

[0013] Further, the steering assembly further includes: a crank, arranged at the top of the rotating shaft; a handle, arranged at the top of the rotating shaft and on the crank; a bolt, which can fix the handle at different positions on the crank according to the steering requirement of the first roller.

[0014] Further, the lifting mechanism further includes: a box body, arranged on the side of the guide rail without the chute, with a power source inside; the rotating shaft cylinder penetrates through the box body upwards, and the crank is arranged on the outer layer of the box body.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] 1. When the first connector of the present application is used, the holes on the connecting plate will be aligned with the holes on the mounting rack of the launch box, and then the launch box can be connected to the first connector by passing a connecting rod through the holes; by rotating the pressing member, the orientation of the limiting block can be adjusted so that the limiting block catches the mounting rack to avoid shaking during transportation; through the combined use of the connecting plate and the limiting block, the launch box is firmly fixed, which is convenient for transportation; when in use, the first connector can be fixed on the transport vehicle, realizing the transfer operation without the need for lifting equipment.

[0017] 2. Since some missiles are relatively large in size and require larger launch boxes, in this case, the launch boxes are placed on pallets. At this time, the first connector is not convenient to use, so a second connector is provided. The second connector can be installed on the first connector through a connecting plate. When in use, the first connector is first installed on the transporter, and then the second connector is installed on the first connector. Adjust the position of the second connector appropriately so that the bearing rod extends into the groove on the side of the pallet, and then the transfer operation can be carried out.

[0018] 3. The second connector can be connected to the first connector through a connecting plate, which can expand the application range of the connector, meet the transfer requirements of launch boxes of different sizes, and is convenient for disassembly and assembly.

[0019] 4. The provided transfer mechanism can lift and lower the lifting frame through a lifting device. When in use, the first connector is set on the lifting frame so that the first connector faces the joint mounting frame of the launch box and is connected and fixed. The number of transfer mechanisms used can be selected according to the weight to be transferred. For example, 4 units can be separately arranged on both sides at the two ends of the launch box. After all the first connectors are connected, the launch box is lifted to an appropriate height through the lifting device, and the operator pushes the transfer mechanism to move, then the bidirectional transfer operation of the launch box between the transport vehicle and the warehouse can be carried out.

[0020] 5. Through the connection of the first roller with the rotating shaft, crank and handle, the first roller can be steered according to actual needs, such as steering 0°, 90°, etc., to meet the actual use requirements and improve the operation convenience.

[0021] 6. The components such as the first connector and the second connector, the lifting frame and the lifting device, the crank and the rotating shaft in this application are all detachably connected, and can be quickly disassembled and assembled according to the actual situation. They can be disassembled when not in use, which can reduce the floor area and facilitate management. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the first connector.

[0024] Figure 2 It is a left view of the first connector.

[0025] Figure 3 It is a schematic structural diagram of the second connector.

[0026] Figure 4It is the left view of the second connector.

[0027] Figure 5 It is the schematic structure of the lifting mechanism Figure 1 .

[0028] Figure 6 It is the schematic structure of the lifting mechanism Figure 2 .

[0029] Figure 7 It is the schematic diagram of the structure of the lifting mechanism (the first connector is not installed).

[0030] Figure 8 It is the schematic diagram of the structure of the lifting mechanism (without the box body blocking).

[0031] Reference numerals: 1 - the first connector, 11 - the first base frame, 12 - the connecting plate, 13 - the connecting rod, 14 - the limiting plate, 15 - the limiting groove, 16 - the limiting block, 17 - the limiting rod, 18 - the pressing member, 2 - the protective pad, 3 - the second connector, 31 - the second base frame, 32 - the adapter plate, 33 - the bearing rod, 34 - the hinge plate, 4 - the guide rail, 41 - the sliding groove, 42 - the first roller, 5 - the lifting frame, 51 - the mounting frame, 52 - the second roller, 53 - the guide wheel, 6 - the lifting device, 7 - the steering assembly, 71 - the rotating shaft cylinder, 72 - the rotating shaft, 73 - the crank, 74 - the handle, 75 - the pin, 8 - the box body, 81 - the power supply. Detailed implementation manners

[0032] For better understanding of the present invention, it is described below with reference to the accompanying drawings through the following examples. These examples fall within the protection scope of the present invention, but do not limit the protection scope of the present invention.

[0033] Example 1

[0034] The transfer connector, as Figures 1 - 2 shown, includes: the first connector 1, including: the first base frame 11; the connecting plates 12 are respectively arranged on both sides of one end of the first base frame 11; the connecting rod 13 is movably connected to the two connecting plates 12; the connecting rod 13 does not contact the first base frame 11.

[0035] The thickness of the first base frame can be made of a steel plate with a thickness of 10 - 16 mm.

[0036] The connecting plate can be an arc-shaped structure with a higher middle and lower sides at both ends. The connection mode between the connecting rod and the connecting plate is pin connection.

[0037] The assembly frame can connect multiple launch boxes and has a certain width and length. Therefore, during the transfer process, in order to maintain stability, two groups of the first connectors can be arranged on both sides of the launch box assembly frame for connection; and it is determined whether to arrange multiple groups of assembly frames in the length direction according to the length of the launch box.

[0038] In use, the first substrate is first set at a suitable position on the transport vehicle, and the setting method can be bolt connection or welding, etc.; the connecting rod is pulled out, and the first substrate is brought close to the launch box, so that the assembled frame part is in the area between the two connecting plates, and the holes of the assembled frame are aligned with the holes of the connecting plates, and then the connecting rod is passed through the holes to achieve the connection.

[0039] Embodiment 2

[0040] As Figures 1 - 2 shown, the first connector 1 further includes: a limiting plate 14, which is arranged on the first base frame 11, and a limiting groove 15 is arranged between two limiting plates 14 on the same side; a limiting block 16, which is arranged in the limiting groove 15 and is movably connected to the limiting plate 14 through a limiting rod 17; a pressing member 18, which is connected to the bottom of the limiting block 16, and by controlling the length of the pressing member 18 in the limiting block 16, the size of the angle between the limiting block 16 and the first base frame 11 can be adjusted; the connecting plate 12 and the limiting plate 14 are respectively at both ends of the first base frame 11 on the same side.

[0041] As Figures 1 - 2 shown, there can be 4 limiting plates, with two in a group arranged at intervals and respectively on both sides of one end of the first substrate; the limiting block is in the limiting groove and is movably connected to the limiting plate through the limiting rod, the width of the limiting block is equal to or slightly smaller than the width of the limiting groove, and there is a certain distance between the bottom and the first substrate, so that the limiting block can have a certain range of up and down rotation space relative to the limiting rod.

[0042] A pressing member is provided at the bottom of one end of the limiting block close to the connecting plate. One end of the pressing member extends into the limiting block and is threadedly connected, and the other end is in contact with the first substrate; by rotating the pressing member, the pressing member is screwed out of the limiting block. Since the other end abuts against the first substrate, the limiting block will gradually be adjusted to an inclined state, so that it can abut against the assembled frame of the launch box to prevent it from shaking; the pressing member can be a screw rod.

[0043] The first connector is connected to the assembled frame of the launch box through the connecting plate and the connecting rod. Although it has a certain fixing effect, there is only one fixing point, and the launch box may still shake during the transfer process. Therefore, further limiting is required; in use, after the connecting plate is connected to the assembled frame, the pressing member is rotated to make the end of the limiting block close to the connecting plate tilt up and abut against the assembled frame, so as to fix it; after the launch tube is transferred to a suitable position, the pressing member is rotated in the reverse direction to make the limiting block reset, and the limiting effect of the limiting block on the assembled frame can be released.

[0044] Embodiment 3

[0045] As Figures 1 - 2 shown, the connector further includes: a protective pad 2, which is arranged at both ends of the first base frame 11; a protective pad 2 is arranged in the area between at least two connecting plates 12 and two limiting blocks 16.

[0046] During the use of the first connector, the cylindrical launch box will partially contact the first base frame at its connection. To prevent damage to the launch box caused by bumps during transportation, protective pads are provided at the first base plates at both ends of the connecting plate and the limiting plate, which can reduce bumps and play a protective role for the launch box; the protective pads can be made of wear-resistant polyurethane material.

[0047] Embodiment 4

[0048] As Figures 3 - 4 shown, the connector further includes: a second connector 3, including: a second base frame 31; an adapter plate 32, respectively arranged on both sides of the second base frame 31; a bearing rod 33, arranged on the second base frame 31 on the back side of the adapter plate 22; when the second connector 3 is in use, the second base frame 31 is placed parallel to the first base frame 11, so that the adapter plate 32 replaces the limiting block 16 and is inserted into the limiting groove 15, and is movably connected to the limiting plate 14 through the limiting rod 17.

[0049] As Figures 3 - 4 shown, the second connector 3 further includes: a hinge plate 34, arranged at both ends on the same side of the second base frame 31 as the adapter plate 32; when the second connector 3 is in use, the hinge plate 34 is located between the two connecting plates 12, and the connecting rod 13 can connect the hinge plate 34 and the connecting plate 12.

[0050] The thickness of the adapter plate can be equal to the width of the limiting groove. When in use, remove the limiting block, then insert the adapter plate into the limiting groove, and then fix it by passing the limiting rod through the hole.

[0051] To improve the stability of the second base plate installed on the first base plate, a hinge plate is provided; during installation, the hinge plate is in the area between the connecting plates, and then the two are fixedly connected through the connecting rod.

[0052] Since some large-sized launch boxes will be directly installed on the pallet, and the pallet is mostly made of channel steel with grooves on the side, therefore, the pallet can be considered to be transported together during transportation to improve the operation efficiency. At this time, the second connector needs to be used; when in use, align the adapter plate and the hinge plate of the second base plate with the limiting groove and the connecting plate on the first base plate, and then connect them through the limiting rod and the connecting rod; in this way, the second base plate can be firmly connected to the first half through the two connection points at the upper and lower ends; and the bearing rod on the back side can extend into the groove on the side of the pallet, so as to carry out the transportation operation; for those who need to use the first connector later, the connecting rod and the limiting rod can be taken out to remove the second connector.

[0053] When using the second connector, it is necessary to ensure the force balance of the pallet, and use the second connector at the corresponding positions on both sides of the pallet; if the pallet is long, multiple groups can also be set in the length direction to ensure the force balance and facilitate safe transportation.

[0054] Example 5

[0055] A lifting mechanism, as Figures 5 - 8 shown, adapted to the transfer connector of the present invention, includes: a guide rail 4 with an open chute 41 on the side and a first roller 42 at the bottom; a lifting frame 5 with a mounting frame 51 located in the chute 41 at the upper part and a second roller 52 at the bottom; a lifting device 6 arranged at the bottom of the chute 41, the end of its piston rod being connected to the top of the mounting frame 51; the side of the first base frame 11 without the connecting plate 12 is arranged on the side of the mounting frame 51 away from the guide rail 4.

[0056] As Figures 5 - 8 shown, the lifting frame 5 further includes guide wheels 53 arranged on both sides; the guide wheels 53 are located in the chute 41 and can slide up and down along its length direction.

[0057] An open chute is arranged on the side of the guide rail, which is convenient for installing the mounting frame of the lifting frame, so that the lifting frame can slide up and down within the length range of the chute, facilitating the lifting or lowering of the launch box during transfer; a limiting plate is arranged at the upper end of the chute to prevent the lifting frame from moving upward beyond the range of the chute and affecting normal use.

[0058] The first base frame can be welded to the upper part of the lifting frame. When the lifting device operates, it can drive the lifting frame to move, so that the first base frame moves to the corresponding position, facilitating the transfer operation.

[0059] Arranging guide wheels on both sides of the mounting frame of the lifting frame can make the up and down movement smoother. The guide wheels can slide up and down along the chute to ensure the smoothness of the operation.

[0060] The lifting device can use a hydraulic rod, which has strong pressure-bearing capacity and is convenient for controlling the lifting position of the lifting frame.

[0061] Since the transfer mechanism consists of two parts, namely the guide rail and the lifting frame, and wheels are needed for movement during transfer, therefore, the first roller and the second roller are respectively arranged to facilitate the transfer operation; the second roller can be a universal wheel and is provided with an existing braking structure.

[0062] In use, first weld the first substrate on the side of the mounting frame facing away from the guide rail; if the first connector is used, first control the lifting frame to a suitable position through the lifting device; then remove the connecting rod, align the connecting plate with the side of the joint mounting frame, and then connect the two with the connecting rod; then turn the fastening member to screw it out, at this time the limiting block tilts up and abuts against the joint mounting frame, so as to fix it; an appropriate number of lifting mechanisms can be selected according to actual needs, and are respectively arranged on both sides of the launch box, and the first connector is connected and fixed to the joint mounting frame; then control the lifting frame to rise through the lifting device, and the operators push each lifting mechanism together to transfer the launch box to a suitable place, and then each group of lifting devices controls the lifting frame to descend to a suitable position at the same time, loosen the connection between the first connector and the joint mounting frame to complete the transfer operation, and the lifting mechanism can be pushed away.

[0063] If the second connector needs to be used and the first connector has been installed on the lifting frame, then connect the second connector to the first connector with reference to the method of Embodiment 4; control the lifting device to make the lifting frame in a suitable position, and select an appropriate number of lifting mechanisms according to actual needs; move each lifting mechanism so that the bearing rods respectively extend into the corresponding positions of the side grooves of the tray, and then simultaneously control each group of lifting frames to rise so that the bearing rods abut against the tray, and then the operators can push the lifting mechanism to the required transfer position, and then simultaneously control the lifting device to make the lifting frame descend to a suitable position, and then the lifting mechanism can be pushed away.

[0064] Embodiment 6

[0065] As Figures 5 - 8 shown, the lifting mechanism further includes: a steering assembly 7, including: a rotating shaft cylinder 71, arranged along the length direction of the non-groove 41 side of the guide rail 4; a rotating shaft 72, arranged in the rotating shaft cylinder 71 and connected to the first roller 42 at the bottom, so that the orientation of the first roller 42 can be controlled by rotating the rotating shaft 72; the wheel diameter of the second roller 52 is smaller than that of the first roller 42, and the bottoms of the two are on the same horizontal plane.

[0066] As Figures 5 - 8 shown, the steering assembly 7 further includes: a crank 73, arranged at the top of the rotating shaft 72; a handle 74, arranged at the top of the rotating shaft 72 and on the crank 73; a bolt 75, which can fix the handle 74 at different positions on the crank 73 according to the steering requirement of the first roller 42.

[0067] The rotating shaft cylinder is arranged on the side of the guide rail to play a fixing role. The rotating shaft is arranged in the rotating shaft cylinder and is connected to the first roller at the bottom. The orientation of the first roller can be adjusted by rotating the rotating shaft, which is convenient for use.

[0068] The first roller has a large size and good load-bearing performance, and a nylon wheel can be used.

[0069] The first roller can be steered according to actual needs to facilitate the transfer operation; the handle is installed on the rotating shaft, and the provided crank can be used to limit the rotation position of the handle, thereby steering the first roller; since the rotation directions of the first roller are mostly 0°, 90°, and 180°, holes can be opened at these three positions corresponding to the crank, and holes are also opened on the handle. The handle can be fixed to the crank by inserting a pin through the holes. When steering is required, according to the angle to be rotated, first remove the pin, turn the handle to the appropriate position, and then fix it by inserting the pin through the holes.

[0070] A pin is provided on the rotating shaft above the crank for limiting. When it is not necessary to limit the steering of the first roller, the crank can be removed.

[0071] Embodiment 7

[0072] As Figures 5 - 8 shown, the lifting mechanism further includes: a box body 8, which is arranged on the side of the guide rail 4 that is not arranged in the chute 41, and a power supply 81 is arranged inside; the rotating shaft cylinder 71 penetrates the box body 8 upward, and the crank 73 is arranged on the outer layer of the box body 8.

[0073] When the lifting device is a hydraulic rod, an oil station needs to be equipped for oil supply. The oil station can be installed in the box body, and the two are connected by pipelines.

[0074] A controller can also be arranged in the box body. The controller is connected to the lifting device for control, so that the controller can notify the lifting height of the lifting device to improve the convenience of operation; the controller is also connected to the electromagnetic valve on the oil station for control to control the valve switch.

[0075] Electricity can be connected to the mains power or a mobile power source (battery) to supply power for the operation of components such as the controller and solenoid valve.

[0076] To facilitate the operator to push the lifting mechanism, a push handle can be arranged at the top of the guide rail above the box body for convenient manual pushing operation.

[0077] Components such as the lifting device, controller, and power supply involved in this application are not the innovative points of the present utility model, and the specific models are not elaborated here.

[0078] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element. The above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. Transfer connector, characterized in that, Comprising: A first connector (1), comprising: A first base frame (11); Connecting plates (12) are respectively arranged on both sides of one end of the first base frame (11); A connecting rod (13) is movably connected to the two connecting plates (12); The connecting rod (13) does not contact the first base frame (11).

2. The transfer connector according to claim 1, wherein, The first connector (1) further comprises: A limiting plate (14) is arranged on the first base frame (11), and a limiting groove (15) is arranged between the two limiting plates (14) on the same side; A limiting block (16) is arranged in the limiting groove (15) and is movably connected to the limiting plate (14) through a limiting rod (17); A pressing member (18) is connected to the bottom of the limiting block (16). By controlling the length of the pressing member (18) inside the limiting block (16), the size of the included angle between the limiting block (16) and the first base frame (11) can be adjusted; The connecting plate (12) and the limiting plate (14) are respectively located at the two ends on the same side of the first base frame (11).

3. The transfer connector according to claim 2, characterized in that Also comprising: A protective pad (2) is arranged at both ends of the first base frame (11); The protective pad (2) is arranged in the area between at least two connecting plates (12) and two limiting blocks (16).

4. The transfer connector according to claim 3, characterized in that, Also comprising: A second connector (3), comprising: A second base frame (31); Adapter plates (32) are respectively arranged on both sides of the second base frame (31); A bearing rod (33) is arranged on the second base frame (31) on the back side of the adapter plate (32); when the second connector (3) is in use, the second base frame (31) is placed parallel to the first base frame (11), so that the adapter plate (32) replaces the limiting block (16) and is inserted into the limiting groove (15), and is movably connected to the limiting plate (14) through the limiting rod (17).

5. The transfer connector according to claim 4, characterized in that The second connector (3) further comprises: A hinge plate (34) is symmetrically arranged at the two ends on the same side of the second base frame (31) as the adapter plate (32); When the second connector (3) is in use, the hinge plate (34) is located between the two connecting plates (12), and the connecting rod (13) can connect the hinge plate (34) and the connecting plates (12).

6. A lifting mechanism, characterized in that, The transfer connector adapted to any one of claims 1-5, comprising: A guide rail (4) has an open chute (41) on the side and a first roller (42) at the bottom; a lifting frame (5) has a mounting frame (51) located in the chute (41) at the upper part and a second roller (52) at the bottom; A lifting device (6) is arranged at the bottom of the chute (41), and the end of its piston rod is connected to the top of the mounting frame (51); The side of the first base frame (11) without the connecting plate (12) is arranged on the side of the mounting frame (51) away from the guide rail (4).

7. The lifting mechanism according to claim 6, characterized in that, The lifting frame (5) further comprises guide wheels (53) arranged on both sides; The guide wheels (53) are located in the chute (41) and can slide up and down along its length direction.

8. The lifting mechanism according to claim 7, wherein Also comprising: A steering assembly (7), comprising: The rotating shaft cylinder (71) is arranged along the length direction of the side of the guide rail (4) that is not the sliding groove (41). The rotating shaft (72) is arranged inside the rotating shaft cylinder (71) and its bottom is connected to the first roller (42), so that the orientation of the first roller (42) can be controlled by rotating the rotating shaft (72). The wheel diameter of the second roller (52) is smaller than that of the first roller (42), and the bottoms of the two are on the same horizontal plane.

9. The lifting mechanism according to claim 8, wherein, The steering assembly (7) further includes: The crank (73) is arranged at the top of the rotating shaft (72). The handle (74) is arranged at the top of the rotating shaft (72) and on the crank (73); the bolt (75) can fix the handle (74) at different positions on the crank (73) according to the steering requirement of the first roller (42).

10. The lifting mechanism according to claim 9, characterized in that, It further includes: The box body (8) is arranged on the side surface of the guide rail (4) that is not provided with the sliding groove (41), and a power supply (81) is arranged inside. The rotating shaft cylinder (71) penetrates through the box body (8) upward, and the crank (73) is arranged on the outer layer of the box body (8).

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