Monorail type truss rail changing device

Abstract

This invention discloses a monorail truss track-changing device. A first set of fixed rails and a second set of fixed rails are arranged at intervals along the transport direction and fixed to a fixed frame. The first connecting ends of several first fixed rails in the first set of fixed rails are arranged at intervals along the vertical transport direction, and the second connecting ends of several second fixed rails in the second set of fixed rails are arranged at intervals along the vertical transport direction. The track-changing device includes a movable frame that can slide horizontally and is mounted on the fixed frame, several docking rails fixedly mounted on the movable frame, and a track-changing drive device that drives the movable frame to move and thus change the position of each docking rail. Any first fixed rail can be aligned and connected with any second fixed rail through different docking rails to form different transport paths for the transport trolley to travel. This invention reduces the mechanical impact on the rails and the damage to the rail joints during the track-changing process, and improves the safety of the entire transport system.

Description

Technical Field

[0001] This invention relates to the combing workshop in the textile industry, and particularly to a single-rail truss track-changing device. Background Technology

[0002] With the continuous improvement of automation and intelligence in the textile industry, the transportation method of cotton rolls in textile workshops has also changed from traditional manual handling to track-type intelligent trolley systems. These systems realize the automatic transportation of cotton rolls between various processes through a pre-set track network, which significantly improves production efficiency and reduces labor costs.

[0003] In actual production layouts, due to factors such as workshop space, process connections, and flow branching, cotton transport trolleys often need to switch travel paths between different tracks to meet the needs of multi-point material supply or diversion. Therefore, the track-changing system is one of the key links in achieving flexible scheduling and ensuring continuous system operation. Currently, the common track-changing method mainly adopts an integrated track-changing approach for docking tracks and cotton transport trolleys, that is, by moving the entire docking track and the cotton transport trolleys parked on it, the track switching and docking are completed together.

[0004] While this structure achieves the rail-changing function to a certain extent, the overall mass of the trolley and the docking track is relatively large. During the rail-changing process, the track docking will generate significant mechanical impact. Long-term operation can easily lead to track deformation, decreased docking accuracy, and even damage to the track joint. When the trolley moves with the track, if the docking is not in place or the control system response is lagging, it may cause safety accidents such as trolley derailment and overturning, posing a significant operational risk. Summary of the Invention

[0005] To overcome the above-mentioned defects, the present invention provides a monorail truss track changing device, which reduces the mechanical impact on the track and the damage to the track joints during the track changing process, thereby improving the safety of the entire transportation system.

[0006] The technical solution adopted by this invention to solve its technical problem is: a single-rail truss track-changing device, comprising a fixed frame, a first set of fixed rails, a second set of fixed rails, a transport trolley, and a control system. The first set of fixed rails and the second set of fixed rails are fixedly installed on the fixed frame, and are arranged at intervals along the transport direction. The first set of fixed rails includes a plurality of first fixed rails, and the second set of fixed rails includes a plurality of second fixed rails. The first connecting ends of the plurality of first fixed rails are arranged at intervals along the perpendicular transport direction, and the second connecting ends of the plurality of second fixed rails are arranged at intervals along the perpendicular transport direction. A track-changing device is also provided. The track-changing device includes a moving frame, docking rails, and a track-changing drive device. The moving frame can be horizontally slidably mounted on a fixed frame. Several docking rails are fixedly mounted on the moving frame. The track-changing drive device drives the moving frame to move, thereby changing the position of each docking rail. Any one of the first fixed rails in the first group can be aligned and connected with any one of the second fixed rails in the second group through different docking rails to form different transport paths. The transport trolley can travel along the transport path formed by the combination of the first fixed rails, docking rails, and second fixed rails to realize material transport. The control system controls the track-changing drive device and the transport trolley to start and stop.

[0007] As a further improvement of the present invention, the first fixed track connecting end in the first group of fixed tracks is a straight track segment or an arc track segment, the second fixed track connecting end in the second group of fixed tracks is a straight track segment or an arc track segment, one end of the docking track is a straight track segment or an arc track segment that matches the connecting end of the first fixed track, and the other end of the docking track is a straight track segment or an arc track segment that matches the connecting end of the second fixed track.

[0008] As a further improvement of the present invention, a linear guide rail is fixedly installed on the fixed frame. The extension direction of the linear guide rail is perpendicular to the transportation direction. A slider is provided on the linear guide rail. The moving frame is fixedly connected to the slider on the linear guide rail. The track-changing drive device drives the moving frame to slide back and forth linearly along the extension direction of the linear guide rail to change the position of each docking track.

[0009] As a further improvement of the present invention, a roller pad is also fixedly installed on the fixed frame, the roller pad is parallel to the linear guide rail, and a roller bearing is installed on the movable frame, the roller bearing being able to roll along the roller pad.

[0010] As a further improvement of the present invention, the fixed frame is fixedly provided with vertical rods extending horizontally along the conveying direction and horizontal rods extending horizontally along the perpendicular conveying direction. The two vertical rods are arranged in parallel intervals, and the two ends of the two parallel intervals of the horizontal rods are respectively fixedly installed on the opposite side walls of the two vertical rods. The linear guide rail and the roller pad are respectively fixedly installed on the two horizontal rods. The movable frame is located in the frame-shaped space enclosed by the two horizontal rods and the two vertical rods. The slider and the roller bearing are respectively installed on the two side walls of the movable frame along the conveying direction. The fixed end of the track-changing drive device is fixedly installed on the vertical rod, and the movable end of the track-changing drive device is connected to the middle position of the movable frame along the conveying direction.

[0011] As a further improvement of the present invention, the two side walls of the movable frame along the conveying direction are respectively provided with U-shaped anti-detachment plates. The two U-shaped anti-detachment plates on the movable frame are sleeved on the outside of the two crossbars, and the upper side wall of the U-shaped anti-detachment plates stops on the upper side of the crossbars.

[0012] As a further improvement of the present invention, the track-changing drive device is a cylinder, the cylinder body of the cylinder is fixedly installed on the fixed frame, the piston rod of the cylinder can extend and retract along the extension direction of the linear guide rail, and the piston rod of the cylinder is fixedly connected to the moving frame.

[0013] As a further improvement of the present invention, the fixed frame is further provided with a position detection device, which can detect the position of the moving frame and transmit its detection data to the control system. A drag chain track extending along the moving direction of the moving frame is fixedly installed on the fixed frame.

[0014] As a further improvement of the present invention, fixed limiting members are respectively installed on the two side walls of the fixed frame along the moving direction of the movable frame, and the two side walls of the movable frame along its moving direction are respectively stopped by the surface of the fixed limiting members.

[0015] As a further improvement of the present invention, the cross-sections of the first fixed track, the second fixed track, and the docking track are "I"-shaped structures. The transport trolley is equipped with a U-shaped bracket, which can be fitted onto the outside of the first fixed track, the second fixed track, and the docking track. The two side walls of the U-shaped structure of the U-shaped bracket respectively stop on the upper and lower sides of the first fixed track, the second fixed track, and the docking track. The upper side wall of the U-shaped structure of the U-shaped bracket is equipped with a drive wheel capable of rotating horizontally. The drive wheel can actively roll along the upper side of the first fixed track, the second fixed track, and the docking track. The upper and lower side walls of the U-shaped structure of the U-shaped bracket are also respectively equipped with support wheels capable of rotating around a vertical axis. The support wheels can roll along the vertical side wall surfaces of the first fixed track, the second fixed track, and the docking track facing the opening of the U-shaped structure of the U-shaped bracket. At least two L-shaped or U-shaped hangers are fixedly installed at the lower ends of both the fixed frame and the movable frame. The hangers are fixedly connected to the side walls of the first fixed rail, the second fixed rail, and the docking rail facing the U-shaped opening of the U-shaped frame. The vertical side wall surfaces of the first fixed rail, the second fixed rail, and the docking rail facing away from the U-shaped opening of the U-shaped frame are covered with sliding contact lines. The transport trolley is equipped with a motor that drives the drive wheel to rotate. The power supply line of the motor is equipped with a contact power-taking element. The contact power-taking element can slide and conduct with the sliding contact lines. The fixed frame is respectively equipped with cables that supply power to the sliding contact lines on the first fixed rail, the second fixed rail, and the docking rail. The fixed frame is also equipped with a drag chain rail that extends along the movement direction of the movable frame. The drag chain is installed inside the drag chain, and the cable that supplies power to the sliding contact lines on the docking rail is installed inside the drag chain.

[0016] The beneficial effects of this invention are as follows: This invention forms a transportation path that meets the current transportation requirements of the transport trolley by simultaneously aligning and connecting the two ends of the docking track with the first and second fixed tracks that match each other. The moving frame of the track-changing device moves back and forth on the fixed frame, allowing the first fixed track to dock with different second fixed tracks, thus forming different transportation paths. This satisfies the need for the transport trolley to smoothly switch between different transportation paths and enables intelligent handling of cotton laps and bobbins between different combing machines and sliver-winding combined machines. The track-changing device of this invention can pre-connect the track for track changing before the transport trolley arrives. After the track changing is completed, the cotton transport trolley smoothly switches to the preset track to achieve the transportation path change. This track-changing method reduces the mechanical impact on the track and damage to the track joints during the track changing process, and also improves the safety of the entire system. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present invention;

[0018] Figure 2This is a first perspective view of the track-changing device of the present invention;

[0019] Figure 3 for Figure 2 Enlarged view of section A in the middle;

[0020] Figure 4 for Figure 2 Enlarged view of section B in the middle;

[0021] Figure 5 This is a second perspective view of the track-changing device of the present invention;

[0022] Figure 6 This is a diagram showing the docking state of the docking track and the inner track of the present invention;

[0023] Figure 7 This is a diagram showing the docking state of the docking track and the outer track according to the present invention;

[0024] Figure 8 for Figure 7 Enlarged view of section C;

[0025] Figure 9 This is a first perspective view of the docking track mounting structure on the moving frame according to the present invention;

[0026] Figure 10 This is a second perspective view of the docking track installation structure on the moving frame according to the present invention. Detailed Implementation

[0027] Example: A monorail truss track-changing device includes a fixed frame 1, a first set of fixed rails, a second set of fixed rails, a transport trolley 2, and a control system. The first and second sets of fixed rails are fixedly installed on the fixed frame 1. The first and second sets of fixed rails are arranged at intervals along the transport direction. The first set of fixed rails includes a plurality of first fixed rails 3, and the second set of fixed rails includes a plurality of second fixed rails. The first connecting ends of the plurality of first fixed rails 3 are arranged at intervals along the perpendicular transport direction, and the second connecting ends of the plurality of second fixed rails are arranged at intervals along the perpendicular transport direction. A track-changing device is also provided, which includes a movable frame 4. The system includes docking tracks and a track-changing drive device. The movable frame 4 can be horizontally slidably mounted on the fixed frame 1. Several docking tracks are fixedly mounted on the movable frame 4. The track-changing drive device drives the movable frame 4 to move, thereby changing the position of each docking track. Any one of the first fixed tracks 3 in the first group of fixed tracks can be aligned and connected with any one of the second fixed tracks in the second group of fixed tracks through different docking tracks, thereby forming different transportation paths. The transport trolley 2 can travel along the transportation path formed by the combination of the first fixed track 3, the docking tracks, and the second fixed tracks to realize material transportation. The control system controls the track-changing drive device and the transport trolley 2 to start and stop.

[0028] During its journey along the track, the transport trolley 2 needs to change its transport path to perform different transport tasks. For example, when the transport trolley 2 travels along the first fixed track 3 to the connecting end, and needs to enter a second fixed track located on the first transport path, the moving frame 4 of the track-changing device moves to a docking track, connecting the first fixed track 3 where the transport trolley 2 is located with the second fixed track located on the first transport path. This allows the transport trolley 2 to enter the second fixed track on the first transport path from its current first fixed track 3 along the docking track, thus enabling the transport trolley 2 to perform its transport task along the first transport path. Similarly, if the transport trolley 2 needs to enter another second fixed track located on the second transport path, the moving frame 4 of the track-changing device moves to another docking track, connecting the first fixed track 3 where the transport trolley 2 is located with the second fixed track located on the second transport path. This allows the transport trolley 2 to enter the second fixed track on the second transport path from its current first fixed track 3 along the docking track. On the second fixed track of the path, the transport trolley 2 travels along the second transport path to perform transport tasks. Before the transport trolley 2 changes transport paths, the track-changing device aligns and connects the docking track with the first fixed track 3 and the second fixed track on the corresponding transport path. The transport trolley 2 does not need to stop and can directly travel along the docking track to the second fixed track on the required transport path, so that the transport trolley 2 can travel along the required transport path as required. In this way, each transport trolley 2 can travel along various transport paths to complete various transport tasks, thereby achieving efficient and flexible material transport and meeting the needs of intelligent material handling. Moreover, the transport trolley 2 does not need to stop and wait during the change of transport path, resulting in high transport efficiency. When the track-changing device moves to change tracks, the transport trolley 2 is not on the docking track. The track-changing device moves quickly, stably, and with low energy consumption, and ensures high track connection accuracy after track change, which is conducive to the smooth passage of the transport trolley 2. It also effectively reduces the mechanical impact on the track during track change, reduces damage to the track joint, and improves the safety of the entire transport system.

[0029] The first fixed track 3 in the first group of fixed tracks has a straight track segment or an arc track segment as its connecting end, and the second fixed track in the second group of fixed tracks has a straight track segment or an arc track segment as its connecting end. One end of the docking track is a straight track segment or an arc track segment that matches the connecting end of the first fixed track 3, and the other end of the docking track is a straight track segment or an arc track segment that matches the connecting end of the second fixed track. A preferred embodiment is as follows: the connecting end of the first fixed track 3 is a straight track segment; the second set of fixed tracks includes an inner track 5 and an outer track 6; the connecting end of the inner track is an arc-shaped track segment; the connecting end of the outer track is a straight track segment; and the connecting end of the outer track and the connecting end of the first fixed track 3 are collinear; the movable frame 4 is provided with two docking tracks, namely a docking straight track 7 and a docking curved track 8; the docking straight track has a straight structure; one end of the docking curved track is a straight track segment; and the other end of the docking curved track is an arc-shaped track segment; the movable frame 4 moves forward so that one end of the docking curved track aligns with the connecting end of the first fixed track 3, and the other end of the docking curved track aligns with the connecting end of the inner track, so that the first fixed track 3 and the inner track are aligned and connected to form an inner ring transportation path; the movable frame 4 moves backward so that one end of the docking straight track aligns with the connecting end of the first fixed track 3, and the other end of the docking straight track aligns with the connecting end of the outer track, so that the first fixed track 3 and the outer track are aligned and connected to form an outer ring transportation path.

[0030] A linear guide rail 9 is fixedly installed on the fixed frame 1. The linear guide rail 9 extends perpendicularly to the transport direction. A slider 10 is provided on the linear guide rail 9. The moving frame 4 is fixedly connected to the slider 10 on the linear guide rail 9. The track-changing drive device drives the moving frame 4 to slide back and forth linearly along the extension direction of the linear guide rail 9 to change the position of each docking track. The linear guide rail 9 and the slider 10 guide the horizontal movement of the moving frame 4, ensuring that the two ends of the docking track on it are perfectly aligned with the first fixed track 3 and the second fixed track, preventing steps from appearing, ensuring that the transport trolley 2 can pass smoothly, and avoiding interference or collision between the transport trolley 2 and the joint when passing through it due to movement errors.

[0031] A roller rail 11 is also fixedly installed on the fixed frame 1. The roller rail 11 is parallel to the linear guide rail 9. A roller bearing 12 is installed on the movable frame 4. The roller bearing 12 can roll along the roller rail 11. When the movable frame 4 moves on the fixed frame 1, the rolling of the roller bearing 12 along the roller rail 11 reduces the moving resistance of the movable frame 4, allowing the movable frame 4 to move smoothly and quickly, and saving the driving energy of the movable frame 4.

[0032] The fixed frame 1 is fixedly provided with vertical rods 13 extending horizontally along the conveying direction and horizontal rods 14 extending horizontally along the vertical conveying direction. The two vertical rods 13 are arranged in parallel and spaced apart. The two ends of the two parallel and spaced horizontal rods 14 are respectively fixedly installed on the opposite side walls of the two vertical rods 13. The linear guide rail 9 and the roller pad are respectively fixedly installed on the two horizontal rods 14. The moving frame 4 is located in the frame-shaped space enclosed by the two horizontal rods 14 and the two vertical rods 13. The slider 10 and the roller bearing 12 are respectively installed on the two side walls of the moving frame 4 along the conveying direction. The fixed end of the track-changing drive device is fixedly installed on the vertical rod 13, and the movable end of the track-changing drive device is connected to the middle position of the moving frame 4 along the conveying direction. The surface of the crossbar 14 used for installing the linear track is also covered with a track pad 15. The linear guide rail 9 is fixedly installed on the track pad. The two side walls of the moving frame 4 along the conveying direction are respectively symmetrically fixed with slider 10 pad 16 and roller pad 17. The slider 10 is fixedly installed on the slider 10 pad, and the roller bearing 12 is installed on the roller pad. Ideally, there are two slider 10 pads and two roller pads, which are respectively provided at both ends of the moving frame 4 along its sliding direction. The slider 10 pad and the roller pad are used to realize the installation of slider 10 and roller on the moving frame 4, and can also play a role in shock absorption during movement.

[0033] The movable frame 4 is also provided with U-shaped anti-detachment plates 18 on both side walls along the conveying direction. The two U-shaped anti-detachment plates 18 on the movable frame 4 are sleeved on the outside of the two crossbars 14, and the upper side wall of the U-shaped anti-detachment plate 18 stops on the upper side of the crossbar 14. This can improve the safety of the movable frame 4 when installed on the fixed frame 1.

[0034] The track-changing drive device is a cylinder 19. The cylinder body of the cylinder 19 is fixedly installed on the fixed frame 1. The piston rod of the cylinder 19 can extend and retract along the extension direction of the linear guide rail 9. The piston rod of the cylinder 19 is fixedly connected to the moving frame 4.

[0035] Ideally, a junction box 20 is also provided on the fixed frame 1. The wiring of the cylinder 19 is connected to the wiring in the junction box by a plug-in method. The junction box ensures that the wiring of the entire system is more standardized and facilitates the maintenance of the wiring in the future. Ideally, the movable frame 4 is composed of a square outer frame and a connecting rod located in the middle of the square frame to form a symmetrical structure. The piston rod of the cylinder 19 is connected to the connecting rod in the middle of the movable frame 4, so that the cylinder 19 applies force to the middle of the movable frame 4 and prevents the movable frame 4 from being unbalanced in force. The track changing drive device can also be realized by the motor 28 and the lead screw mechanism. This is an equivalent replacement structure that can be easily thought of by those skilled in the art based on this patent, and all of them are within the scope of protection of this patent.

[0036] The fixed frame 1 is also equipped with a position detection device 21, which can detect the position of the moving frame 4 and transmit the detection data to the control system. A drag chain track 29 extending along the moving direction of the moving frame 4 is fixedly installed on the fixed frame 1. The position detection device 21 on the fixed frame 1 consists of two sensors (contact sensors or photoelectric sensors) fixedly installed on the fixed frame 1. The two sensors are arranged at intervals along the moving direction of the moving frame 4. The moving frame 4 is equipped with a trigger protrusion. When the moving frame 4 moves to the docking straight rail and connects with the outer rail, the trigger protrusion triggers one sensor. When the moving frame 4 moves to the docking curved rail and connects with the inner rail, the trigger protrusion triggers the other sensor. The trigger protrusion can be set on the roller pad or the slider 10 pad.

[0037] Fixed limiting members 22 are respectively installed on the two side walls of the fixed frame 1 along the moving direction of the moving frame 4. The two side walls of the moving frame 4 along its moving direction stop on the surface of the fixed limiting members 22. The fixed limiting members 22 hard limit the reciprocating movement position of the moving frame 4. That is, when the moving frame 4 moves to a docking position, it is hard limited by one fixed limiting member, and when the moving frame 4 moves to another docking position, it is hard limited by another fixed limiting member. This can ensure the track docking accuracy and thus ensure the smooth progress of the track replacement work.

[0038] The first fixed track 3, the second fixed track, and the docking track have an "I"-shaped cross-section. The transport trolley 2 is equipped with a U-shaped bracket 23, which can be fitted onto the outside of the first fixed track 3, the second fixed track, and the docking track. The two side walls of the U-shaped structure of the U-shaped bracket 23 respectively stop on the upper and lower sides of the first fixed track 3, the second fixed track, and the docking track. The upper side wall of the U-shaped structure of the U-shaped bracket 23 is equipped with a drive wheel 24 that can rotate horizontally. The drive wheel 24 can actively roll along the upper side of the first fixed track 3, the second fixed track, and the docking track. The upper and lower side walls of the U-shaped structure of the U-shaped bracket 23 are also equipped with support wheels 25 that can rotate around a vertical axis. The support wheels 25 can roll along the vertical side wall surface of the first fixed track 3, the second fixed track, and the docking track facing the opening of the U-shaped structure of the U-shaped bracket 23. The fixed frame 1 and the moving frame 4 are connected below. At least two L-shaped or U-shaped hangers 26 are fixedly provided at each end. The hangers 26 are fixedly connected to the side walls of the first fixed rail 3, the second fixed rail, and the docking rail facing the U-shaped structure opening of the U-shaped bracket 23. The vertical side wall surfaces of the first fixed rail 3, the second fixed rail, and the docking rail facing away from the U-shaped structure opening of the U-shaped bracket 23 are covered with sliding contact lines 27. The transport trolley 2 is equipped with a motor 28 that drives the drive wheel 24 to rotate. The power supply line of the motor 28 is equipped with a contact power taking element. The contact power taking element can slide and make contact with the sliding contact lines 27. The fixed frame 1 is respectively equipped with cables that supply power to the sliding contact lines 27 on the first fixed rail 3, the second fixed rail, and the docking rail. The fixed frame 1 is also equipped with a drag chain rail 29 extending along the movement direction of the moving frame 4. The drag chain 30 is provided inside the drag chain, and the cable that supplies power to the sliding contact lines 27 on the docking rail is installed inside the drag chain 30.

[0039] The fixed frame 1 and the movable frame 4 are fixedly connected to the fixed rail and the docking rail respectively by clamps. The fixed rail and the docking rail are firmly installed without interfering with the movement of the transport trolley 2. When the transport trolley 2 moves along the fixed rail and the docking rail, the contact power-taking element on the transport trolley 2 contacts the sliding contact line 27 to take power, eliminating the need to connect cables to the transport trolley 2 and avoiding cable tangling. By setting a drag chain rail 29 on the fixed frame 1 and installing a drag chain 30 on the drag chain rail 29, one end of the drag chain 30 is fixedly connected to the drag chain rail 29, and the other end is fixedly connected to the drag chain bracket and fixedly connected to the movable frame 4. In this way, the power supply cable of the sliding contact line 27 on the docking rail is hidden inside the drag chain 30. The drag chain 30 ensures that the wires are not easily messed up and broken during system operation. When the transport trolley 2 moves on the rail, it is achieved by the drive wheel 24 rolling on the rail, and the stable translation of the transport trolley 2 on the rail is achieved by the U-shaped bracket 23 and the support wheel 25 on it.

Claims

1. A monorail truss track-changing device, comprising a fixed frame (1), a first set of fixed rails, a second set of fixed rails, a transport trolley (2), and a control system, wherein the first set of fixed rails and the second set of fixed rails are fixedly installed on the fixed frame, the first set of fixed rails and the second set of fixed rails are arranged at intervals along the transport direction, the first set of fixed rails includes a plurality of first fixed rails (3), the second set of fixed rails includes a plurality of second fixed rails, the first connecting ends of the plurality of first fixed rails are arranged at intervals along the vertical transport direction, and the second connecting ends of the plurality of second fixed rails are arranged at intervals along the vertical transport direction, characterized in that: It is also equipped with a track-changing device, which includes a moving frame (4), docking rails and a track-changing drive device. The moving frame can be horizontally slidably installed on the fixed frame. Several docking rails are fixedly installed on the moving frame. The track-changing drive device drives the moving frame to move and thereby changes the position of each docking rail. Any one of the first fixed rails in the first group of fixed rails can be aligned and connected with any one of the second fixed rails in the second group of fixed rails through different docking rails to form different transportation paths. The transport trolley can travel along the transportation path formed by the combination of the first fixed rail, docking rail and second fixed rail to realize material transportation. The control system controls the track-changing drive device and the transport trolley to start and stop.

2. The monorail truss track-changing device according to claim 1, characterized in that: The first fixed track in the first group of fixed tracks has a straight track segment or an arc track segment as its connecting end, and the second fixed track in the second group of fixed tracks has a straight track segment or an arc track segment as its connecting end. One end of the docking track is a straight track segment or an arc track segment that matches the connecting end of the first fixed track, and the other end of the docking track is a straight track segment or an arc track segment that matches the connecting end of the second fixed track.

3. The monorail truss track-changing device according to claim 1 or 2, characterized in that: A linear guide rail (9) is fixedly installed on the fixed frame. The extension direction of the linear guide rail is perpendicular to the transportation direction. A slider (10) is provided on the linear guide rail. The moving frame is fixedly connected to the slider on the linear guide rail. The track-changing drive device drives the moving frame to slide back and forth linearly along the extension direction of the linear guide rail to change the position of each docking track.

4. The monorail truss track-changing device according to claim 3, characterized in that: A roller rail (11) is also fixedly installed on the fixed frame. The roller rail is parallel to the linear guide rail. A roller bearing (12) is installed on the movable frame. The roller bearing can roll along the roller rail.

5. The monorail truss track-changing device according to claim 4, characterized in that: The fixed frame is fixedly provided with a vertical rod (13) extending horizontally along the conveying direction and a horizontal rod (14) extending horizontally along the vertical conveying direction. The two vertical rods are arranged in parallel intervals. The two ends of the two parallel intervals of the horizontal rods are respectively fixedly installed on the opposite side walls of the two vertical rods. The linear guide rail and the roller pad are respectively fixedly installed on the two horizontal rods. The moving frame is located in the frame-shaped space enclosed by the two horizontal rods and the two vertical rods. The slider and the roller bearing are respectively installed on the two side walls of the moving frame along the conveying direction. The fixed end of the track-changing drive device is fixedly installed on the vertical rod, and the movable end of the track-changing drive device is connected to the middle position of the moving frame along the conveying direction.

6. The monorail truss track-changing device according to claim 5, characterized in that: The movable frame is also provided with U-shaped anti-detachment plates (18) on both sides of the conveying direction. The two U-shaped anti-detachment plates on the movable frame are sleeved on the outside of the two crossbars, and the upper side of the upper side of the U-shaped anti-detachment plates is stopped on the upper side of the crossbars.

7. The monorail truss track-changing device according to claim 3, characterized in that: The track-changing drive device is a cylinder (19). The cylinder body is fixedly installed on the fixed frame. The piston rod of the cylinder can extend and retract along the extension direction of the linear guide rail. The piston rod of the cylinder is fixedly connected to the moving frame.

8. The monorail truss track-changing device according to claim 1, characterized in that: The fixed frame is also provided with a position detection device (21), which can detect the position of the moving frame and transmit its detection data to the control system. A drag chain track extending along the moving direction of the moving frame is fixedly installed on the fixed frame.

9. The monorail truss track-changing device according to claim 1, characterized in that: Fixed limiting members (22) are also installed on the two side walls of the fixed frame along the moving direction of the movable frame, and the two side walls of the movable frame along its moving direction are respectively stopped on the surface of the fixed limiting members.

10. The monorail truss track-changing device according to claim 1, characterized in that: The first fixed track, the second fixed track, and the docking track have an "I" shaped cross-section. The transport trolley is equipped with a U-shaped bracket (23). The U-shaped bracket can be fitted onto the outside of the first fixed track, the second fixed track, and the docking track. The two side walls of the U-shaped structure of the U-shaped bracket stop on the upper and lower sides of the first fixed track, the second fixed track, and the docking track, respectively. The upper side wall of the U-shaped structure of the U-shaped bracket is equipped with a drive wheel (24) that can rotate around a horizontal axis. The drive wheel can actively roll along the upper side of the first fixed track, the second fixed track, and the docking track. The upper and lower side walls of the U-shaped structure of the U-shaped bracket are also equipped with support wheels (25) that can rotate around a vertical axis. The support wheels can roll along the vertical side wall surface of the first fixed track, the second fixed track, and the docking track facing the opening of the U-shaped structure of the U-shaped bracket. The lower ends of the fixed frame and the movable frame are... Each is fixedly provided with at least two L-shaped or U-shaped hangers (26). The hangers are fixedly connected to the side walls of the first fixed rail, the second fixed rail, and the docking rail facing the U-shaped structure opening of the U-shaped frame. The vertical side wall surfaces of the first fixed rail, the second fixed rail, and the docking rail facing away from the U-shaped structure opening of the U-shaped frame are covered with sliding contact lines (27). The transport trolley is provided with a motor (28) that drives the drive wheel to rotate. The power supply line of the motor is provided with a contact power taking element. The contact power taking element can slide and make contact with the sliding contact line. The fixed frame is provided with cables that supply power to the sliding contact lines on the first fixed rail, the second fixed rail, and the docking rail. The fixed frame is also provided with a drag chain rail (29) extending along the movement direction of the moving frame. The drag chain is provided with a drag chain (30) inside the drag chain. The cable that supplies power to the sliding contact lines on the docking rail is installed inside the drag chain.

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