A hydraulic flow traction system and method for high-speed railway track plate maintenance unit

Abstract

The present invention relates to the technical field of high-speed railway track plate maintenance, and in particular to a hydraulic flow traction system and method for a high-speed railway track plate maintenance unit, wherein two adjacent tractors are connected via a coupling, the coupling comprises a hook and a clamping shaft respectively arranged on the two adjacent tractors, a sliding portion is provided on the hook, and a stopper corresponding to the hook at an exit of a maintenance kiln passage is arranged inside, and a first slope and a second slope inclined downward are respectively provided at both ends of the sliding surface; the slope of the first slope is greater than that of the second slope, and the slope length of the first slope is less than that of the second slope; the number of foundation embedded parts and sensors is reduced, the civil engineering embedded work required in the early stage of equipment construction and installation is reduced, the construction volume of the temporary construction process is reduced, the construction difficulty is low, and the construction period is saved; the coupling and uncoupling of the coupling are realized by the stopper, and the coupling will not be invalidated by erosion of the humid environment in the maintenance passage, and the maintenance and repair are easy.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-speed railway track slab maintenance, and in particular relates to a hydraulic flow traction system and method for a high-speed railway track slab maintenance unit. Background Art

[0002] There are two production methods for the prestressed concrete track slab of CTRTSⅢ slab track: the pedestal method and the assembly line method. The assembly line method has relatively high requirements for the circulation system. The circulation traction system of the steam curing workshop of the track slab automatic production line originally used a traction rod connected to the corresponding traction hook machine installed in the center of the track. Through the forward and reverse rotation of the traction motor, a row of molds can move forward at a certain distance. However, due to the rust caused by the humid maintenance environment, the workload of later maintenance has been greatly increased, so a new maintenance area traction system needs to be set up.

[0003] Therefore, it is necessary to provide an improved technical solution to address the above-mentioned deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the above-mentioned prior art, and the present invention provides a hydraulic flow traction system and method for a high-speed railway track plate maintenance unit.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A hydraulic flow traction system for a high-speed railway track plate maintenance unit, the traction system comprising maintenance tracks respectively located in a plurality of maintenance channels, a plurality of tractors being arranged on the same maintenance track, two adjacent tractors being connected by a coupling, the coupling comprising a hook and a clamping shaft respectively arranged on the two adjacent tractors, the hook rotating around a hinge shaft along a longitudinal plane to clamp the clamping shaft;

[0007] The hook is provided with a sliding part, and a stopper corresponding to the exit of the curing kiln passage and corresponding to the hook is provided inside, the upper surface of the stopper is a sliding surface higher than the lower edge of the sliding part, and the two ends of the sliding surface are respectively provided with a first slope and a second slope inclined downward; the slope of the first slope is greater than that of the second slope, and the slope length of the first slope is less than that of the second slope;

[0008] In response to the two tractors driven against each other by the first pushing device passing through the block and entering the maintenance channel, the sliding portion of the hook is guided by the first slope to rotate upward, and after passing through the block, the hook is driven by gravity to rotate downward to engage the clamping shaft;

[0009] In response to the two tractors connected by the coupling being driven by the second pushing device to pass through the block and leave the maintenance channel, the sliding portion of the hook is guided by the second slope and rotates upward to disengage the hook from the clamping shaft.

[0010] Preferably, the tractor is provided with a stopper corresponding to the lower side of the hook and matched with the height of the clamping shaft to limit the rotation angle of the hook.

[0011] Preferably, when the hook is supported by the stopper, the lowest point of the sliding portion is located in the middle of the second slope.

[0012] Preferably, a hinge plate is provided on one side of the stopper corresponding to the second slope, a hinge ear corresponding to the hinge plate is provided on the lower surface of the second slope, and a return spring is provided below the end of the second slope away from the stopper to drive the end of the second slope close to the stopper to press against the sliding surface of the stopper.

[0013] Preferably, the upper surface of the hinge plate is an inclined surface, and the slope of the inclined surface is greater than the second slope;

[0014] One end of the second slope close to the stopper is provided with a horizontal guide portion corresponding to the sliding surface, and the stopper is provided with a step corresponding to the horizontal guide portion.

[0015] Preferably, the two hooks are respectively located on both sides of the tractor, and the two blocks respectively correspond to the hooks on both sides of the tractor.

[0016] Preferably, a limit block is provided between two adjacent tractors to limit the distance between the two adjacent tractors so that the hook and the clamping shaft correspond to each other.

[0017] Preferably, a transverse moving vehicle is provided on the transverse moving track, and the transverse moving vehicle is provided with a transverse moving track corresponding to the maintenance track. A positioning seat is provided on the side of the tractor, and a positioning plate corresponding to the positioning seat is provided on the transverse moving vehicle.

[0018] Preferably, a horizontally extending positioning hole is provided in the middle of the positioning seat, and the positioning plate is slidably assembled in a sliding seat pointing to the tractor, and extends into or withdraws from the positioning hole under the drive of the driving member;

[0019] Guide rollers corresponding to the driving member are arranged on both sides of the positioning hole, and positioning pins corresponding to the mold of the track plate to be maintained are arranged on the tractor.

[0020] A hydraulic circulation and traction method for a high-speed railway track plate maintenance unit, which uses any of the above traction systems to circulate a track plate traction vehicle, comprises the following steps:

[0021] Step S1, moving the tractor to the designated maintenance channel through the transverse track of the maintenance kiln, and pushing the tractor into the maintenance channel through the first pushing device;

[0022] Step S2, driving the next tractor to the maintenance channel, and driving the two tractors against each other through the block to enter the maintenance channel through the first pushing device, the sliding part of the hook is guided by the first slope to rotate upward, and after passing the block, the hook is driven by gravity to rotate downward to engage with the clamping shaft, and multiple tractors are pushed into the maintenance channel in turn, so that multiple tractors in the same maintenance channel are connected through the coupling;

[0023] Step S3, after the maintenance is completed, the second pushing device is used to drive the two tractors connected by the coupling to pass through the block and leave the maintenance channel, and the sliding part of the hook is guided by the second slope and rotates upward to make the hook disengage from the clamping shaft, thereby pushing multiple tractors from the maintenance channel to the transverse track, so that the multiple tractors are moved to the next workstation through the transverse track in turn.

[0024] Beneficial effects: Two adjacent tractors are connected by a coupling, which reduces the number of foundation embedded parts and sensors, reduces the civil engineering embedded work required in the early stage of equipment construction and installation, reduces the construction workload during temporary construction, reduces the construction difficulty, and saves construction time; the coupling is connected and disconnected by a block, and will not be corroded by the humid environment in the maintenance channel and fail, making it easy to maintain and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0026] Figure 1 A simplified structural diagram of a tractor in a specific embodiment provided by the present invention;

[0027] Figure 2 A schematic structural diagram of a hook in a specific embodiment provided by the present invention;

[0028] Figure 3 A schematic structural diagram of a stopper in a specific embodiment provided by the present invention;

[0029] Figure 4 A schematic diagram of the distribution of the curing kiln in the specific embodiment provided by the present invention;

[0030] Figure 5 A simplified cross-sectional view of a curing kiln in a specific embodiment provided by the present invention;

[0031] Figure 6This is a simplified structural diagram of the pushing device in the specific embodiment provided by the present invention.

[0032] In the figure: 1, tractor; 2, positioning seat; 3, slide seat; 4, positioning plate; 5, driving member; 6, positioning pin; 7, hook; 8, block; 9, clamping shaft; 10, limit block; 11, transverse track; 12, maintenance channel; 13, clamping plate; 14, transverse vehicle; 15, hydraulic cylinder; 16, pulley; 701, sliding part; 801, sliding surface; 802, first slope; 803, hinged plate; 804, second slope; 805, return spring. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0034] In the description of the present invention, the terms "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense. For example, they can be fixed connections or detachable connections; they can be directly connected or indirectly connected through intermediate components. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0035] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0036] like Figure 1-6 As shown, a hydraulic flow traction system of a high-speed railway track plate maintenance unit is arranged in a maintenance kiln, and the maintenance kiln includes a plurality of parallel extending maintenance channels 12, through which the concrete pieces placed therein are steam-cured, and the traction system includes maintenance tracks respectively located in the plurality of maintenance channels 12, and a plurality of tractors 1 are arranged on the same maintenance track, and the plurality of tractors 1 are connected end to end in sequence, and two adjacent tractors 1 are connected by a coupling, and the coupling includes a hook 7 and a clamping shaft 9 respectively arranged on the two adjacent tractors 1, and the hook 7 rotates around the hinge shaft along the longitudinal plane to clamp the clamping shaft 9.

[0037] The hook 7 is welded from steel plates and is hinged to the first end of the tractor 1 through a hinge shaft. The clamping shaft 9 is fixed to the second end of the tractor 1. A notch corresponding to the clamping shaft 9 is provided on the steel plate. A sliding portion 701 is provided on the hook 7. The sliding portion 701 can be a semicircular structure that is integrally formed with the hook 7 and protrudes downward, or can be any one of a roller, a bearing, etc. A stopper 8 corresponding to the exit of the curing kiln passage and corresponding to the hook 7 is provided inside. The stopper 8 is a metal structure fixed to the inner side of the curing track by embedded bolts. The upper surface of the stopper 8 is a sliding surface 801 that is higher than the lower edge of the sliding portion 701. The sliding surface 801 is a horizontal plane extending along the length direction of the curing track. The two ends of the sliding surface 801 are provided with a first slope 802 and a second slope 804 that are inclined downward, respectively. The first slope 80 2 is used for coupling the hook 7 and the clamping shaft 9, and the second slope 804 is used for uncoupling the hook 7 and the clamping shaft 9. The slope of the first slope 802 is greater than that of the second slope 804, and the slope length of the first slope 802 is less than that of the second slope 804. The hook 7 passing through the first slope 802 can be quickly rotated upward by changing the slope, and the angle can be maintained by the support of the sliding surface 801. When the next tractor 1 passes through the sliding surface 801, its clamping shaft 9 can be placed in the waiting position corresponding to the hook 7. After the two tractors 1 pass through the sliding surface 801, the hook 7 is rotated downward by gravity and accurately docks with the clamping shaft 9.

[0038] When the hook 7 passes through the second slope 804, the sliding part 701 will slide along the second slope 804. At this time, as the hook 7 moves forward, it rotates upward under the pressure of the second slope 804, so that it can be separated from the card shaft 9. The second slope 804 is relatively gentle and has a longer length, thereby ensuring that the hook 7 can be smoothly separated from the card shaft 9.

[0039] In an optional embodiment, the angle of the first slope 802 is 45 degrees, and the angle of the second slope 804 is 15 degrees. In response to the two tractors 1 driven against each other by the first pushing device passing through the block 8 and entering the maintenance channel 12, the sliding portion 701 of the hook 7 is guided by the first slope 802 to rotate upward, and after passing through the block 8, the hook 7 is driven by gravity to rotate downward to engage the clamping shaft 9; in response to the two tractors 1 connected by the coupling driven by the second pushing device passing through the block 8 and leaving the maintenance channel 12, the sliding portion 701 of the hook 7 is guided by the second slope 804 to rotate upward to disengage the hook 7 from the clamping shaft 9.

[0040] In an optional embodiment, a stopper is provided on the tractor 1, which is located below the corresponding hook 7 and is matched with the height of the clamping shaft 9 to limit the rotation angle of the hook 7. The stopper avoids the inconvenience caused by the hook 7 tilting downward. When the hook 7 is supported by the stopper, the lowest point of the sliding part 701 is located in the middle of the second slope 804. By limiting the lowest point of the sliding part 701, it is ensured that the sliding part 701 can pass through the second slope 804 under any circumstances, thereby avoiding the problem of unhooking failure or movement interference caused by the second slope 804 stopping the sliding part 701.

[0041] In an optional embodiment, the first slope 802 is integrally formed with the sliding surface 801 and is connected to the sliding surface 801 through a smooth transition. The second slope 804 is connected to the main body of the block 8 by a hinge. Specifically, a hinge plate 803 is provided on the side of the block 8 corresponding to the second slope 804, and a hinge ear corresponding to the hinged hinge plate 803 is provided in the middle of the lower surface of the second slope 804. The hinge ear and the hinge plate 803 are hinged correspondingly, and a return spring 805 is provided below the end of the second slope 804 away from the block 8 to drive the end of the second slope 804 close to the block 8 to press against the sliding surface 801 of the block 8. The return spring 805 forms a buffer to avoid damage to the second slope 804 caused by the impact of the sliding part 701, and when the sliding part 701 slides along the second slope 804, the return spring 805 provides an initial upward thrust to facilitate the hook 7 to rotate upward and unhook.

[0042] Furthermore, the upper surface of the hinged plate 803 is an inclined surface, and the slope of the inclined surface is greater than the second slope 804, which can be 20-30 degrees, so that the second slope 804 has sufficient buffer space. The second slope 804 is a steel plate, and a horizontal guiding portion corresponding to the sliding surface 801 is provided at its end close to the stopper 8. The horizontal guiding portion and the second slope 804 are transitioned through a smooth surface, and a step corresponding to the horizontal guiding portion is provided on the stopper 8. The depth of the step is adapted to the thickness of the second slope 804, so that the step and the second slope 804 are connected to each other to form a flat surface when the reset spring 805 is lifted.

[0043] In an optional embodiment, two hooks 7 are respectively located on both sides of the tractor 1, and two stoppers 8 correspond to the hooks 7 on both sides of the tractor 1 to ensure the force balance of the tractor 1. A limit block 10 is provided between two adjacent tractors 1 to limit the distance between the two adjacent tractors 1 so that the hooks 7 correspond to the clamping shaft 9. The limit block 10 can be a metal column and is fixed to the end of the tractor 1 by bolts, so as to achieve adaptive adjustment.

[0044] In an optional embodiment, the limit block 10 can also be a direction block set on the main beam of the tractor 1. An installation notch is provided on the limit block 10 for installing the hook 7 and the card shaft 9. When the limit blocks 10 on two adjacent tractors 1 are against each other, the hook 7 and the card shaft 9 are exactly corresponding to each other, and the coupling can be achieved.

[0045] In an optional embodiment, a transverse track 11 is provided with a transverse vehicle 14, and a transverse track 11 corresponding to the maintenance track is provided on the transverse vehicle 14. Optionally, both ends of the maintenance channel 12 pass through the curing kiln, and a transverse track 11 is respectively provided at both ends of the curing kiln. One of the transverse tracks 11 can be used as a kiln exit track and the other track as a kiln entry track, so as to perform track plate maintenance; or the kiln entry and exit are performed on both transverse tracks 11. At this time, blocks 8 are provided at both ends of the curing channel 12, which can increase the kiln exit and kiln entry efficiency.

[0046] The transverse track 11 is lower than the maintenance track, and the transverse vehicle 14 is provided with a track section at the same height as the maintenance track, so that the tractor 1 is moved to the transverse vehicle 14, a positioning seat 2 is provided on the side of the tractor 1, and a positioning plate 4 corresponding to the positioning seat 2 is provided on the transverse vehicle 14.

[0047] Furthermore, the first pushing device and the second pushing device only differ in direction and installation position, and both include a hydraulic cylinder 15 and a pulley 16. One end of the hydraulic cylinder 15 is hinged and fixed on the maintenance channel 12 or the transverse vehicle 14, and the other end is hinged to the pulley 16. A boomerang-shaped card plate 13 corresponding to the crossbeam of the tractor 1 is hinged on the upper surface of the pulley 16. The corresponding angle of the card plate 13 is 120-135 degrees. The middle part of the card plate 13 is hinged to the pulley 16 through a hinge shaft, so that the tractor 1 can be driven by rotating forward in a longitudinal plane parallel to the maintenance track to pass through the crossbeam of the tractor 1, and blocking the crossbeam of the tractor 1 during the retraction process.

[0048] A first pushing device and a second pushing device are respectively provided on the inlet and outlet of the maintenance channel 12 and the transverse shifting vehicle 14. The specific installation positions and directions of the first pushing device and the second pushing device are adjusted according to the kiln entry and exit mode or actual needs.

[0049] Specifically, a horizontally extending positioning hole is provided in the middle of the positioning seat 2, and the positioning hole is square. The positioning plate 4 is a square plate. The positioning plate 4 is slidably assembled in the slide seat 3 pointing to the tractor 1, and the slide seat 3 is provided with a sliding channel facing the positioning hole. The positioning plate 4 extends into or out of the positioning hole under the drive of the driving member 5. The driving member 5 can be either an oil cylinder or an air cylinder. Guide rollers corresponding to the driving member 5 are provided on both sides of the positioning hole. The front ends of the positioning plate 4 are inclined on both sides to facilitate guiding the positioning plate 4. The tractor 1 is provided with positioning pins 6 corresponding to the mold of the track plate to be maintained, and the positioning pins 6 are used to fix the tractor 1.

[0050] The present application also provides a hydraulic circulation and traction method for a high-speed railway track plate maintenance unit, which circulates the track plate tractor 1 through any of the above-mentioned traction systems, including the following steps: Step S1, moving the tractor 1 to a designated maintenance channel 12 through the transverse track 11 of the maintenance kiln, and pushing the tractor 1 into the maintenance channel 12 through a first pushing device, so that the hook 7 of the tractor 1 is located on the sliding surface 801 of the block 8, and then the first pushing device is reset, and the transverse vehicle 14 transports the next tractor 1.

[0051] Step S2, the next tractor 1 is driven to the maintenance channel 12 along the traverse track 11 by the traverse vehicle 14, so that the two tractors 1 are relatively distributed, and the two tractors 1 that are counteracting each other are driven by the first jacking device to pass through the block 8 and enter the maintenance channel 12. The sliding part 701 of the hook 7 is guided by the first slope 802 to rotate upward, and after passing through the block 8, the hook 7 is driven by gravity to rotate downward to engage the clamping shaft 9, and multiple tractors 1 are pushed into the maintenance channel 12 in sequence. Multiple tractors 1 in the same maintenance channel 12 are connected by the coupling device in the form of jacking, and the complete work of the tractor 1 corresponding to a mold entering the maintenance line is completed. This process does not need to be repeatedly pulled by the previous traction rod, and can be completed by the jacking of the first jacking device. The overall movement of the mold in the maintenance line is achieved by the mold interconnection device toucher connecting the molds in the steaming and curing intervals as a whole during the collision of the molds, increasing the walking resistance and firmness of the molds and improving the quality of the concrete.

[0052] Step S3, when the mold moves out of each curing area, a block is installed on the ground to disengage the mold coupling so that the tractor 1 returns to an independent unit. After the curing is completed, the second pushing device is used to drive two or more tractors 1 connected by the coupling to pass through the block 8 and leave the curing channel 12. The sliding portion 701 of the hook 7 is guided by the second slope 804 and rotates upward to disengage the hook 7 from the clamping shaft 9, thereby pushing multiple tractors 1 from the curing channel 12 to the transverse track 11, so that the multiple tractors 1 are moved to the next station through the transverse track 11 in turn, and the kiln exit action is completed.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are within the scope of protection of the pending claims of the present invention.

Claims

1. A hydraulic flow traction system for a high-speed railway track plate maintenance unit, characterized in that: The traction system comprises maintenance tracks respectively located in a plurality of maintenance channels, a plurality of tractors are arranged on the same maintenance track, two adjacent tractors are connected by a coupling, the coupling comprises a hook and a clamping shaft respectively arranged on the two adjacent tractors, the hook rotates around a hinge shaft along a longitudinal plane to clamp the clamping shaft; The hook is provided with a sliding part, and a stopper corresponding to the exit of the curing kiln passage and corresponding to the hook is provided inside, the upper surface of the stopper is a sliding surface higher than the lower edge of the sliding part, and the two ends of the sliding surface are respectively provided with a first slope and a second slope inclined downward; the slope of the first slope is greater than that of the second slope, and the slope length of the first slope is less than that of the second slope; In response to the two tractors driven against each other by the first pushing device passing through the block and entering the maintenance channel, the sliding portion of the hook is guided by the first slope to rotate upward, and after passing through the block, the hook is driven by gravity to rotate downward to engage the clamping shaft; In response to the second pushing device driving the two tractors connected by the coupling to pass through the block and leave the maintenance channel, the sliding portion of the hook is guided by the second slope and rotates upward to disengage the hook from the clamping shaft; A hinge plate is provided on one side of the stopper corresponding to the second slope, a hinge ear corresponding to the hinge plate is provided on the lower surface of the second slope, and a return spring is provided below the end of the second slope away from the stopper to drive the end of the second slope close to the stopper to press against the sliding surface of the stopper; The upper surface of the hinge plate is an inclined surface, and the slope of the inclined surface is greater than the second slope; The second slope is provided with a horizontal guide portion corresponding to the sliding surface at one end close to the stopper, and the stopper is provided with a step corresponding to the horizontal guide portion; The two hooks are respectively located on both sides of the tractor, and the two blocks respectively correspond to the hooks on both sides of the tractor.

2. The high-speed railway track plate maintenance unit hydraulic flow traction system according to claim 1 is characterized in that: The tractor is provided with a stopper corresponding to the lower side of the hook and matched with the height of the clamping shaft to limit the rotation angle of the hook.

3. The hydraulic flow traction system of the high-speed railway track plate maintenance unit according to claim 2 is characterized in that: When the hook is supported by the stopper, the lowest point of the sliding portion is located in the middle of the second slope.

4. The hydraulic flow traction system for the high-speed railway track plate maintenance unit according to claim 1 is characterized in that: A limiting block is provided between two adjacent tractors to limit the distance between the two adjacent tractors so that the hook and the clamping shaft correspond to each other.

5. The hydraulic flow traction system for the high-speed railway track plate maintenance unit according to claim 1 is characterized in that: A transverse moving vehicle is provided on the transverse moving track, and the transverse moving vehicle is provided with a transverse moving track corresponding to the maintenance track. A positioning seat is provided on the side of the tractor, and a positioning plate corresponding to the positioning seat is provided on the transverse moving vehicle.

6. The hydraulic flow traction system for the high-speed railway track plate maintenance unit according to claim 5 is characterized in that: A horizontally extending positioning hole is provided in the middle of the positioning seat, and the positioning plate is slidably assembled in the sliding seat pointing to the tractor, and extends into or withdraws from the positioning hole under the drive of the driving member; Guide rollers corresponding to the driving member are arranged on both sides of the positioning hole, and positioning pins corresponding to the mold of the track plate to be maintained are arranged on the tractor.

7. A hydraulic circulation and traction method for a high-speed railway track plate maintenance unit, wherein the track plate traction vehicle is circulated by using the traction system described in any one of claims 1 to 6, characterized in that: The following steps are involved: Step S1, moving the tractor to the designated maintenance channel through the transverse track of the maintenance kiln, and pushing the tractor into the maintenance channel through the first pushing device; Step S2, driving the next tractor to the maintenance channel, and driving the two tractors against each other through the block to enter the maintenance channel through the first pushing device, the sliding part of the hook is guided by the first slope to rotate upward, and after passing the block, the hook is driven by gravity to rotate downward to engage with the clamping shaft, and multiple tractors are pushed into the maintenance channel in turn, so that multiple tractors in the same maintenance channel are connected through the coupling; Step S3, after the maintenance is completed, the second pushing device is used to drive the two tractors connected by the coupling to pass through the block and leave the maintenance channel, and the sliding part of the hook is guided by the second slope and rotates upward to make the hook disengage from the clamping shaft, thereby pushing multiple tractors from the maintenance channel to the transverse track, so that the multiple tractors are moved to the next workstation through the transverse track in turn.

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