A track and positioning vehicle for automated detection

Abstract

The utility model belongs to the field of automation detection technology, and disclose a track and positioning carrier for automation detection, including track, positioning carrier, low friction guide limiting component, carrier power supply assembly, high accuracy positioning cooperation, carrier movement component, carrier positioning assembly, power supply cooperation, this device takes flat inner recess track as the foundation, passes through the positioning carrier and carries the product operation, and carrier movement component adopts motor drive wheel and friction strip cooperation to provide power, and power supply assembly and power supply cooperation structure realize sliding power supply, avoid cable dragging, and high accuracy positioning cooperation and carrier positioning assembly cooperate through light gap and light signal receiving device, realize accurate positioning, and light gap can be blocked and set up flexibly, and the device is convenient for adjusting detection station, and the device does not need complex circuit component, and the cost is low, and the practicality is strong, can effectively improve the detection efficiency, provides the innovative solution of reusable, easy expansion for industrial automation detection.

Description

Technical Field

[0001] This utility model relates to the field of automated detection technology, specifically to a track and positioning vehicle for automated detection. Background Technology

[0002] In modern industrial production, automated testing equipment, with its advantages of high precision, high efficiency, and strong stability, has become a key technological tool for ensuring product quality and improving production efficiency. From the precision testing of electronic components to the comprehensive performance evaluation of automotive parts, automated testing equipment has been widely used in various industries such as electronics, machinery, automobiles, and food, greatly reducing the errors and labor intensity of manual testing and promoting the intelligent upgrading of industrial production.

[0003] However, most mainstream automated testing equipment is designed as a highly integrated, single-function system. Such systems are typically customized around specific testing items, deeply binding testing instruments, control systems, and transport mechanisms, forming a fixed pattern of "one system corresponding to several testing tasks." When companies need to add new testing items due to product iteration or quality standard improvements, they often face numerous difficulties in technological transformation. On the one hand, adding new testing items requires introducing entirely new testing equipment; on the other hand, existing systems lack compatibility. New equipment not only requires rebuilding an independent product transport environment but also designing complex transfer mechanisms to move the products to be tested from the original testing station to the new station. This transfer process not only increases equipment purchase and installation costs but also significantly increases testing time due to multiple transfers, resulting in low production efficiency. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a track and positioning vehicle for automated inspection, thereby solving the problems mentioned in the background art, such as the high cost of adding new inspection items and the significant increase in inspection time caused by transportation.

[0005] To achieve the aforementioned objectives, this utility model provides the following technical solution: a track and positioning vehicle for automated detection, comprising:

[0006] The track is a straight, concave strip structure, and the side of the concave groove of the track is provided with a limit slot;

[0007] At least one set of positioning vehicles, the positioning vehicles are set on the track, the positioning vehicles include a chassis and a transport platform, the chassis is slidably engaged in a limiting slot in the track, the transport platform is provided on the chassis, and a structural block is provided at the bottom of the chassis;

[0008] Four sets of low-friction guide and limiting components are respectively disposed on both sides of the track groove;

[0009] A vehicle power supply assembly is disposed at the bottom of the track, and one end of the vehicle power supply assembly is connected to a power supply.

[0010] High-precision positioning and fitting, wherein the high-precision positioning and fitting is disposed at the bottom of the track;

[0011] A vehicle motion assembly is disposed at the bottom of the chassis to drive the positioning vehicle to move;

[0012] A vehicle positioning component is disposed at the bottom of the chassis, and the vehicle positioning component cooperates with the high-precision positioning to achieve high-precision positioning.

[0013] The power supply is located at the bottom of the chassis and works in conjunction with the vehicle power supply component to supply power to the vehicle motion components.

[0014] Preferably, the low-friction guide and limiting component includes a ball groove, a ball, and a ball limiting plate. The upper and lower sides of the limiting groove are provided with ball grooves, multiple sets of balls are arranged in the ball grooves, and a ball limiting plate is provided at the opening of the ball groove.

[0015] Preferably, the vehicle power supply assembly includes an insulating support strip and two sets of battery cells. An insulating support strip is provided at the bottom of the track, and two sets of battery cells are provided on one side of the insulating support strip. The two sets of battery cells are connected to the power supply.

[0016] Preferably, the power supply assembly includes a power supply groove and two sets of power-collecting brushes. A vertical power supply groove is provided on the structural block of the positioning carrier. Two sets of power-collecting brushes are provided on one side of the power supply groove. The carrier power supply assembly is slidably engaged in the power supply groove, and the two sets of battery cells are in slidable contact with the two sets of power-collecting brushes respectively.

[0017] Preferably, the high-precision positioning device includes a stop bar and a light-transmitting notch, and the bottom of the track is provided with a stop bar, and the stop bar has a through light-transmitting notch.

[0018] Preferably, the vehicle positioning component includes LED beads and a light signal receiver. The structural block of the positioning vehicle has a slot corresponding to the stop bar. The stop bar is slidably engaged in the slot. The slot is provided with LED beads and a light signal receiver. The LED beads and the light signal receiver are respectively fixedly installed on both sides of the stop bar.

[0019] Preferably, the vehicle motion component includes a motor, a drive wheel, and a friction strip. The motor is fixedly installed on the structural block of the positioning vehicle, and the drive wheel is coaxially fixed on the output shaft of the motor. A friction strip is provided at the bottom of the track, and the drive wheel and the friction strip are in frictional engagement.

[0020] Compared with the prior art, this utility model provides a track and positioning vehicle for automated detection, which has the following advantages:

[0021] 1. The track and positioning carrier used for automated testing are equipped with a track, positioning carrier, low-friction guide and limit components, carrier power supply components, high-precision positioning components, carrier motion components, carrier positioning components, and power supply components. The carrier can carry products in one direction on the track and can be controlled to stop at the testing station for testing operations. It has no complex circuit components or control chips, has low cost, stable transport, and is easy to add new testing equipment without the need to rebuild the transport environment and transfer equipment. It is convenient to use and highly practical.

[0022] 2. Equipped with a vehicle positioning component and high-precision positioning, it can position and stop the vehicle, facilitating inspection operations. The light-transmitting notch used to determine the positioning coordinates can be filled or opened at will, making it easy to add or adjust the position of inspection equipment. This avoids the need for a dedicated system, and the track and vehicle can be reused, which can significantly save costs, improve inspection efficiency, and enhance practicality.

[0023] 3. Equipped with a low-friction guide and limit component, which utilizes the characteristics of ball bearings to change the surface contact limit to point contact, which can significantly reduce friction, reduce unplanned friction factors, effectively improve accuracy, and extend the service life of the equipment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a side view of the overall structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the various structures at the track of this utility model;

[0027] Figure 4 This is a schematic diagram of the various structures of the positioning carrier of this utility model;

[0028] Figure 5 This is a schematic diagram of the various structures of the positioning carrier of this utility model.

[0029] In the diagram: 1. Track; 2. Positioning vehicle; 3. Low-friction guide and limit assembly; 4. Vehicle power supply assembly; 5. High-precision positioning fit; 6. Vehicle motion assembly; 7. Vehicle positioning assembly; 8. Power supply fit; 9. Chassis; 10. Transport platform; 11. Ball groove; 12. Ball; 13. Ball limit plate; 14. Insulating bearing strip; 15. Battery cell; 16. Stop bar; 17. Light transmission notch; 18. Motor; 19. Drive wheel; 20. Friction strip; 21. LED light bead; 22. Light signal receiver; 23. Power supply groove; 24. Power-taking brush. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1-4 This utility model provides a technical solution:

[0032] A track and positioning vehicle for automated inspection, comprising:

[0033] Track 1 is a straight, concave strip structure, and limit slots are provided on the sides of the concave groove of Track 1.

[0034] At least one positioning carrier 2 is provided, which is set on the track 1. The positioning carrier 2 includes a chassis 9 and a transport platform 10. The chassis 9 is slidably engaged in the limiting slot within the track 1. The transport platform 10 is provided on the chassis 9, and a structural block is provided at the bottom of the chassis 9. The transport platform 10 is used to transport products and needs to be processed according to the shape corresponding to the product or using a fixture corresponding to the product. The structural block is also provided with an on / off circuit for processing simple signals. Its function is to cut off the circuit after receiving the signal. The specific circuit is not limited. Any method commonly used by those skilled in the art is applicable to this device. A simple circuit method is provided here, using an H3BA-N8H time relay, which is connected across the power supply wire of the motor 18. Its trigger signal input terminal is connected to the optical signal receiver 22.

[0035] Four sets of low-friction guide and limit components 3 are respectively disposed on both sides of the groove of the track 1;

[0036] Vehicle power supply component 4 is located at the bottom of the track 1, and one end of the vehicle power supply component 4 is connected to the power supply.

[0037] High-precision positioning fit 5 is set at the bottom of the inner track 1;

[0038] The vehicle motion component 6 is located at the bottom of the chassis 9 to drive and position the vehicle 2.

[0039] The vehicle positioning component 7 is located at the bottom of the chassis 9. The vehicle positioning component 7 and the high-precision positioning cooperation 5 cooperate with each other to achieve high-precision positioning.

[0040] Power supply assembly 8 is located at the bottom of chassis 9. Power supply assembly 8 works in conjunction with vehicle power supply assembly 4 to supply power to vehicle motion assembly 6.

[0041] Furthermore, the low-friction guide and limiting assembly 3 includes a ball groove 11, balls 12, and a ball limiting plate 13. Ball grooves 11 are provided on both the upper and lower sides of the limiting slot, and multiple sets of balls 12 are arranged within the ball grooves 11. The ball limiting plate 13 is located at the opening of the ball grooves 11. The contact area between the multiple sets of balls 12 and the chassis 9 is extremely small, which can significantly reduce friction. This not only provides limiting and guiding for the chassis 9 but also significantly reduces unplanned friction factors, effectively improving the accuracy of the device.

[0042] Furthermore, the vehicle power supply assembly 4 includes an insulating support strip 14 and two sets of battery cells 15. An insulating support strip 14 is provided at the bottom of the track 1, and two sets of battery cells 15 are provided on one side of the insulating support strip 14. The two sets of battery cells 15 are connected to the power supply.

[0043] Furthermore, the power supply assembly 8 includes a power supply groove 23 and two sets of power-collecting brushes 24. A vertical power supply groove 23 is formed on the structural block of the positioning carrier 2. Two sets of power-collecting brushes 24 are arranged on one side of the power supply groove 23. The carrier power supply assembly 4 is slidably engaged within the power supply groove 23. Two sets of battery cells 15 are in sliding contact with the two sets of power-collecting brushes 24 respectively. The two sets of battery cells 15 correspond to DC positive and negative or AC neutral and live. A switching circuit is also provided within the structural block to guide the electrical energy from the power-collecting brushes 24 to the motor 18 and LED beads 21. The switching circuit also receives electrical signals from the light signal receiver 22 to cut off the power supply to the motor 18.

[0044] Furthermore, the high-precision positioning device 5 includes a stop bar 16 and a light-transmitting notch 17. A stop bar 16 is located at the bottom of the track 1, and a through-type light-transmitting notch 17 is formed on the stop bar 16. The light-transmitting notch 17 is used to trigger positioning. It can be positioned in front of the location where positioning is required to stop, causing the positioning carrier 2 to stop detecting. If the detection equipment needs to be moved or adjusted, the original light-transmitting notch 17 can be sealed with an opaque filling material, and a new light-transmitting notch 17 can be created at the new location. Typically, the light-transmitting notch 17 is positioned a certain distance in front of the detection equipment. Even after the positioning carrier 2 loses power, it can still slide a certain distance. When the transported product is not changed, its sliding distance is fixed with minimal error. However, when the transported product is changed, the mass changes, causing the sliding distance to become variable. Therefore, this device is only suitable for a single product and cannot be used for multiple products. Furthermore, changing the transported product requires readjustment.

[0045] Furthermore, the positioning component 7 includes LED beads 21 and a light signal receiver 22. The structural block of the positioning carrier 2 has a slot corresponding to the stop bar 16. The stop bar 16 slides into the slot, where the LED beads 21 and the light signal receiver 22 are installed. The LED beads 21 and the light signal receiver 22 are fixedly installed on both sides of the stop bar 16. The light signal receiver 22 receives light signals and converts them into electrical signals for output. When the positioning carrier 2 moves to the light-transmitting notch 17, the stop bar 16 loses its light-blocking ability. The light signal receiver 22 receives the light from the LED beads 21 and outputs an electrical signal to the switching circuit. The switching circuit cuts off the power supply to the motor 18, and the positioning carrier 2 stops moving. It is recommended that the light signal receiver 22 use a Vishay BPW34 photodiode (5.4×4.3×3.2mm) or a TSL235RTO-92 optical frequency converter (4.5×3.2×2.5mm), as they are compact, have fast response speeds, and can meet the usage requirements.

[0046] Furthermore, the carrier motion component 6 includes a motor 18, a drive wheel 19, and a friction strip 20. The motor 18 is fixedly mounted on the structural block of the positioning carrier 2, and the drive wheel 19 is coaxially fixed to the output shaft of the motor 18. A friction strip 20 is provided at the bottom of the track 1, and the drive wheel 19 and the friction strip 20 engage in frictional contact. The drive wheel 19 and friction strip 20 need to be replaced after prolonged use and wear. If the transported product is lightweight, the drive wheel 19 and friction strip 20 can be replaced with gears or racks. However, the use of gears or racks is not recommended for heavy products, as excessive stress can easily lead to tooth deformation and a short service life for the equipment.

[0047] Structural Description:

[0048] Track 1: The basic support structure of the device, which is a flat concave strip with a limit slot on the side of the concave groove, used to support the positioning carrier 2 and other components and provide a path for their operation;

[0049] Positioning carrier 2: Set on track 1, including chassis 9 and transport platform 10. Chassis 9 is slidably engaged in the limiting slot of track 1. Transport platform 10 is used to transport products. The bottom structural block is equipped with a circuit for switching on and off.

[0050] Low-friction guide and limit assembly 3: It is set on both sides of the groove of the track 1 and includes ball groove 11, ball 12 and ball limit plate 13. The friction is reduced by the point contact of the ball 12 to achieve the limit and guide of the chassis 9.

[0051] Vehicle power supply component 4: Located at the bottom of the track 1, it includes an insulating support strip 14 and two sets of battery cells 15, and is connected to a power source to supply power to the positioning vehicle 2;

[0052] High-precision positioning assembly 5: Located at the bottom of the track 1, including a stop bar 16 and a light-transmitting notch 17, used to cooperate with the vehicle positioning assembly 7 to achieve precise positioning of the positioning vehicle 2;

[0053] Vehicle motion component 6: Located at the bottom of chassis 9, it includes motor 18, drive wheel 19 and friction strip 20. The motor 18 drives the drive wheel 19 to engage with the friction strip 20 to provide power for the positioning vehicle 2.

[0054] Vehicle positioning component 7: Located at the bottom of chassis 9, it includes LED beads 21 and light signal receiver 22, and works in conjunction with high-precision positioning 5 to achieve stop control of positioning vehicle 2 through light signals;

[0055] Power supply assembly 8: Located at the bottom of the chassis 9, it includes a power supply groove 23 and two sets of power-collecting brushes 24, which slide in contact with the vehicle power supply assembly 4 to supply power to the vehicle motion assembly 6;

[0056] Chassis 9: A component of the positioning carrier 2, which slides and engages in the limiting slot of the track 1, and is used to install the transport platform 10 and the bottom structural block;

[0057] Transport platform 10: Installed on chassis 9, used to transport products, its shape must match the product or use corresponding fixtures;

[0058] Ball groove 11: It is formed on the upper and lower sides of the limiting groove of the track 1 to accommodate the ball 12, and is a component of the low friction guide limiting assembly 3;

[0059] Ball 12: Installed in ball groove 11, it contacts the chassis at 9 points, greatly reducing friction and achieving limit guidance;

[0060] Ball limiting plate 13: It is set at the opening of the ball groove 11 to fix the ball 12 and prevent it from falling off;

[0061] Insulating support strip 14: Located at the bottom of the inner track 1, used to install two sets of battery cells 15 and insulate them;

[0062] Battery cell 15: Installed on one side of the insulating support strip 14, with two sets corresponding to the positive and negative power supplies respectively, and sliding in contact with the power-taking brush 24 to supply power;

[0063] Bar 16: Located at the bottom of the track 1, it is used to install the light-transmitting notch 17 and cooperates with the vehicle positioning assembly 7 to achieve positioning;

[0064] Light-transmitting notch 17: It is opened on the stop bar 16 and is a through structure, used to trigger the positioning vehicle 2 to stop;

[0065] Motor 18: It is fixedly installed on the structural block of the positioning carrier 2, and the output shaft is coaxially fixed to the drive wheel 19 to provide power for the movement of the carrier;

[0066] Drive wheel 19: Coaxially fixed on the output shaft of motor 18, it frictionally engages with the friction strip 20 at the bottom of track 1 to transmit power;

[0067] Friction strip 20: Located at the bottom of the track 1, it engages with the drive wheel 19 in frictional contact to assist in the movement of the positioning carrier 2;

[0068] LED light bead 21: Installed on one side of the baffle 16 in the slot of the structural block of the positioning carrier 2, used to emit light and cooperate with the light signal receiver 22 to achieve positioning;

[0069] Optical signal receiver 22: Installed on the other side of the baffle 16 in the slot of the structural block of the positioning carrier 2, it receives the light from the LED beads 21 and converts it into an electrical signal;

[0070] Power supply groove 23: It is a vertical structure opened on the structural block of the positioning carrier 2 and is used to snap the carrier power supply component 4;

[0071] Power-taking brush 24: Located on one side of the power supply groove 23, it slides in contact with the battery cell 15 to realize power transmission.

[0072] Working Principle: Track 1 serves as the basic load-bearing structure, providing a straight running path; positioning carrier 2 carries the product to be inspected; low-friction guide and limit assembly 3 ensures smooth carrier operation; carrier power supply assembly 4 and power supply cooperation 8 achieve power transmission; high-precision positioning cooperation 5 and carrier positioning assembly 7 achieve precise stopping; carrier motion assembly 6 provides driving force. These components work together to form a whole. Positioning carrier 2 is connected to track 1 via chassis 9 and employs a unique low-friction guide and limit assembly 3. This assembly has ball grooves 11 on the upper and lower sides of the limit slot on track 1, with multiple sets of balls 12 installed inside, and fixed by ball limit discs 13. This transforms traditional surface contact friction into point contact friction, significantly reducing motion resistance and enabling smooth carrier operation. At the same time, the rolling characteristics of the balls 12 reduce unplanned friction factors and improve motion accuracy. Carrier motion assembly 6 uses a motor 18 to drive wheels 19 in conjunction with friction strips 20 at the bottom of track 1 to provide power. This friction drive method is simple in structure and easy to maintain. For low-quality products, the system can be improved by replacing it with a gear and rack transmission. The system employs a sliding power supply design, avoiding the problems associated with traditional cable dragging. Two sets of battery cells 15 are mounted on the insulating support strip 14 of the vehicle power supply component 4, corresponding to the positive and negative poles of the power supply, respectively. Two sets of power-collecting brushes 24 are installed in the power supply groove 23 at the bottom of the positioning vehicle 2, maintaining sliding contact with the battery cells 15. This design ensures stable power transmission to the vehicle, simplifies the vehicle structure, and reduces the possibility of malfunctions. The control system is based on an on / off circuit. When the positioning vehicle 2 is running, power is transmitted to the motor 18 through the power-collecting brushes 24, driving the vehicle forward. The on / off circuit (time relay) within the structural block acts as a control, receiving trigger signals from the optical signal receiver 22 to achieve precise control of the power supply to the motor 18. The system can flexibly control the movement state of the vehicle according to actual needs. The high-precision positioning assembly 5, together with the vehicle positioning component 7, constitutes the positioning core of the system. A light-transmitting notch 17 is provided on the bottom stop bar 16 of track 1. LED beads 21 and light signal receivers 22 are installed in the slots at the bottom of the positioning carrier 2, located on either side of the stop bar 16. When the carrier moves to the position of the light-transmitting notch 17, the light from the LED beads 21 passes through the notch and is captured by the receiver. The light signal receiver 22 can quickly convert the light signal into an electrical signal and transmit it to the on / off circuit. Upon receiving the signal, the on / off circuit immediately cuts off the power supply to the motor 18, stopping the carrier's movement. The light-transmitting notch 17 can be sealed with opaque material and opened in a new location without requiring structural modifications to track 1. This design allows the system to flexibly adjust the position of the inspection station or add new inspection stations according to actual production needs, improving the system's adaptability and scalability. In summary, the automated inspection track and positioning carrier system, through mechanical structural innovation and modular design, successfully solves the scalability problem of traditional inspection equipment, providing a flexible and reliable solution for industrial automated inspection with broad application prospects.

[0073] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A track and positioning vehicle for automated detection, characterized in that, include: Track (1), the track (1) is a flat concave strip structure, and the inner groove side of the track (1) is provided with a limit slot; At least one set of positioning carriers (2) are provided on the track (1). The positioning carrier (2) includes a chassis (9) and a transport platform (10). The chassis (9) is slidably engaged in the limiting slot in the track (1). The transport platform (10) is provided on the chassis (9). The bottom of the chassis (9) is provided with a structural block. Four sets of low-friction guide and limit components (3) are respectively disposed on both sides of the groove of the track (1); Vehicle power supply assembly (4), the vehicle power supply assembly (4) is disposed at the bottom of the track (1), and one end of the vehicle power supply assembly (4) is connected to a power supply. High-precision positioning fit (5), the high-precision positioning fit (5) is set at the bottom of the track (1); The vehicle motion component (6) is disposed at the bottom of the chassis (9) to drive the positioning vehicle (2) to move; Vehicle positioning component (7) is disposed at the bottom of the chassis (9). The vehicle positioning component (7) cooperates with the high-precision positioning device (5) to achieve high-precision positioning. Power supply assembly (8) is located at the bottom of the chassis (9). The power supply assembly (8) cooperates with the vehicle power supply assembly (4) to supply power to the vehicle motion assembly (6).

2. The track and positioning vehicle for automated detection according to claim 1, characterized in that, The low-friction guide limiting component (3) includes a ball groove (11), a ball (12) and a ball limiting plate (13). The upper and lower sides of the limiting slot are provided with ball grooves (11). Multiple sets of balls (12) are provided in the ball groove (11). The opening of the ball groove (11) is provided with a ball limiting plate (13).

3. The track and positioning vehicle for automated detection according to claim 1, characterized in that, The vehicle power supply assembly (4) includes an insulating support strip (14) and two sets of battery cells (15). An insulating support strip (14) is provided at the bottom of the track (1). Two sets of battery cells (15) are provided on one side of the insulating support strip (14). The two sets of battery cells (15) are connected to the power source.

4. A track and positioning vehicle for automated detection according to claim 3, characterized in that, The power supply assembly (8) includes a power supply groove (23) and two sets of power-collecting brushes (24). The structural block of the positioning carrier (2) has a vertical power supply groove (23). Two sets of power-collecting brushes (24) are provided on one side of the power supply groove (23). The carrier power supply assembly (4) is slidably engaged in the power supply groove (23). The two sets of battery cells (15) are in sliding contact with the two sets of power-collecting brushes (24) respectively.

5. A track and positioning vehicle for automated detection according to claim 1, characterized in that, The high-precision positioning fit (5) includes a stop bar (16) and a light-transmitting notch (17). The bottom of the track (1) is provided with a stop bar (16), and a through light-transmitting notch (17) is provided on the stop bar (16).

6. A track and positioning vehicle for automated detection according to claim 5, characterized in that, The vehicle positioning component (7) includes LED beads (21) and light signal receiver (22). The structural block of the positioning vehicle (2) has a slot corresponding to the stop bar (16). The stop bar (16) is slidably engaged in the slot. The slot is provided with LED beads (21) and light signal receiver (22). The LED beads (21) and light signal receiver (22) are respectively fixedly installed on both sides of the stop bar (16).

7. A track and positioning vehicle for automated detection according to claim 1, characterized in that, The vehicle motion component (6) includes a motor (18), a drive wheel (19) and a friction strip (20). The motor (18) is fixedly installed on the structural block of the positioning vehicle (2). The drive wheel (19) is coaxially fixed on the output shaft of the motor (18). A friction strip (20) is provided at the bottom of the track (1). The drive wheel (19) and the friction strip (20) are in frictional engagement.

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