A mother-daughter vehicle

Abstract

The present application relates to the technical field of mother-son vehicle, and particularly relates to a mother-son vehicle, which comprises a mother vehicle body, a mother vehicle track, a son vehicle body and a son vehicle track, and a turnover butt joint is arranged on the mother vehicle body; the turnover butt joint comprises a turnover seat arranged at the end of the son vehicle track, the turnover seat is arranged along the extension direction of the son vehicle track, a turnover rod is hinged to the turnover seat through a rotating shaft at one end of the turnover seat away from the son vehicle track, a driving element is in transmission connection with the rotating shaft, and the driving element is used for controlling the rotation of the rotating shaft; the turnover butt joint has a first state and a second state, in the first state, the turnover rod is rotated to be horizontally parallel to the turnover seat, and the son vehicle body is moved out of the son vehicle track through the turnover seat and the turnover rod; in the second state, the turnover rod is rotated to be upwardly inclined, the turnover rod restricts the son vehicle body from being moved out of the son vehicle track, and the transportation safety and the operation efficiency of the mother-son vehicle are improved.

Description

Technical Field

[0001] This invention relates to the field of tandem vehicle technology, and more particularly to a tandem vehicle. Background Technology

[0002] With the rapid development of logistics warehousing, industrial production lines and intelligent automated warehouses, the application of mother-daughter carts is becoming more and more widespread. With the collaborative mode of the mother cart carrying the daughter cart and the daughter cart independently storing and retrieving goods, efficient and low-cost material turnover is achieved, and it is widely used in workshop material transportation, automated warehouse goods storage and retrieval, heavy component transfer and other scenarios.

[0003] Currently, when the mother car carries the daughter car and cargo for long-distance or high-speed travel, the daughter car is prone to slipping along its track due to factors such as starting and stopping inertia, road bumps, track alignment deviations, and lateral impacts. It may even detach from the sides of the track or slip off at the end, leading to safety accidents such as cargo tipping over, which seriously threatens the safety of workers and production efficiency. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a mother-daughter vehicle to solve the problems affecting safety and production efficiency.

[0005] To achieve the above objectives, the present invention provides a mother-daughter vehicle, comprising a mother vehicle body, a mother vehicle track for restricting movement disposed below the mother vehicle body, the mother vehicle body moving along the mother vehicle track, a daughter vehicle body supported on the mother vehicle body, a daughter vehicle track for restricting the movement of the daughter vehicle body mounted on the mother vehicle body, the daughter vehicle body moving along the daughter vehicle track, the direction of movement of the mother vehicle track forming an angle with the direction of movement of the daughter vehicle track, and a flip-connection component disposed on the mother vehicle body; the flip-connection component includes a flip seat disposed at the end of the daughter vehicle track, the flip seat extending along the daughter vehicle track... The track extends along the direction of the vehicle track. The end of the flipping seat away from the sub-vehicle track is hinged to a flipping rod via a rotating shaft. The rotating shaft is driven by a driving component, which controls the rotation of the rotating shaft. The flipping docking member has a first state and a second state. In the first state, the flipping rod is rotated to be horizontally parallel to the flipping seat, and the sub-vehicle body can move on the flipping rod and the flipping seat, and the sub-vehicle body moves out of the sub-vehicle track via the flipping seat and the flipping rod. In the second state, the flipping rod is rotated and raised to an upward tilt, and the flipping rod restricts the sub-vehicle body from moving out of the sub-vehicle track.

[0006] Optionally, the driving component includes a tilting drive motor disposed below the tilting seat and mounted on the mother car body. The output end of the tilting drive motor is connected to an output shaft. An active arm is fixedly connected to the side wall of the output shaft. The tilting rod is fixed to the side wall of the rotating shaft. A driven arm is fixedly connected to the side wall of the rotating shaft. A connecting rod is hinged between the active arm and the driven arm.

[0007] Optionally, the head and tail of the mother car body are provided with anti-collision components for collision prevention. The anti-collision components include an anti-collision plate located on one side of the mother car body. A sliding rod is connected to the end face of the anti-collision plate. A through hole is opened on the mother car body for the sliding rod to pass through. A slot is opened coaxially at one end of the through hole near the anti-collision plate. A connecting spring is sleeved on the outside of the sliding rod. The connecting spring is located between the end face of the anti-collision plate and the bottom of the slot. A receiving groove communicating with the through hole is opened on the lower end face of the mother car body. A swing plate is hinged to the end of the sliding rod away from the anti-collision plate and accommodated in the receiving groove. The middle part of the swing plate is rotatably connected to the side wall of the receiving groove through a swing shaft.

[0008] Optionally, the lower end of the swing plate is connected to an inverted U-shaped mating block, and the groove at the lower end of the inverted U-shaped mating block is configured to mate with the mother car track.

[0009] Optionally, an elastic pad is provided in the groove of the inverted U-shaped mating block.

[0010] Optionally, the front and rear of the mother vehicle body are equipped with anti-collision bumpers, which are fixedly connected to the anti-collision plate by fixing rods.

[0011] Optionally, the mother car body includes a mother car frame, and a mother car wheel is provided at the bottom of the mother car frame. The mother car wheel moves along the mother car track. The mother car wheel includes a mother driving wheel and a mother driven wheel. The mother car body is provided with a mother car moving drive component for controlling the rotation of the mother driving wheel. The mother car moving drive component includes a mother car motor installed on the mother car frame. The output end of the mother car motor is connected to the mother driving wheel through a universal joint coupling.

[0012] Optionally, the vehicle body includes a vehicle frame, the vehicle frame is provided with a plurality of frame slots, a hydraulic lifting component is provided at the frame slot, the hydraulic lifting component includes a hydraulic cylinder, and the telescopic end of the hydraulic cylinder is connected to a lifting plate for lifting items.

[0013] Optionally, the bottom of the subcarriage frame is provided with subcarriage wheels, which move along the subcarriage track. The subcarriage wheels include a sub-driving wheel and a sub-driven wheel. The subcarriage body is provided with a subcarriage movement drive for controlling the rotation of the sub-driving wheel. The subcarriage movement drive includes a subcarriage motor mounted on the subcarriage frame. A sub-main shaft is drivenly connected to one side of the output end of the subcarriage motor, and the end of the sub-main shaft is drivenly connected to the sub-driving wheel.

[0014] The beneficial effects of the present invention are as follows: The present invention provides a mother-daughter vehicle. The flip-over docking parts of the device are symmetrically arranged at both ends of the extension of the daughter vehicle track. After flipping, they can form a double-sided limiting barrier, which simultaneously blocks the daughter vehicle body from both ends of the daughter vehicle track, avoiding the risk of the daughter vehicle body sliding laterally or getting off the track due to inertia, bumps or lateral forces. The anti-get-off protection is comprehensive, the safety is high, and the incidence of safety accidents is greatly reduced.

[0015] When the trolley body needs to enter or exit the trolley track, the tilting rod flips downward and is set horizontally with the tilting seat. Both the tilting seat and the tilting rod are located at the extension of the trolley track. The tilting seat and the tilting rod, as extensions of the trolley track, facilitate the normal driving and connection of the trolley body. During the transportation of the mother car, the tilting rod flips upward to the limit position, quickly forming protection. No additional manual fixing or disassembly is required. The operation is efficient and suitable for automated operation scenarios.

[0016] The double-sided flip-and-connector of the subcarriage track can effectively offset the lateral impact force during the operation of the subcarriage body, reduce the subcarriage body's movement and swaying, ensure the stability of the subcarriage body's position on the mother car body, avoid cargo tipping and collision damage, reduce collision wear between the subcarriage body and the subcarriage track, extend the service life of the equipment, reduce maintenance downtime, improve transportation stability, and protect goods and equipment.

[0017] This mother-daughter vehicle has a simple structure, is easy to operate, provides comprehensive protection, and does not affect the normal operation of the daughter vehicle, thus improving the safety and efficiency of mother-daughter vehicle transportation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the mother car body of the present invention;

[0021] Figure 3 This is a top view of the main body of the mother vehicle according to the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the flip-over docking component of the present invention;

[0023] Figure 5 This is a schematic diagram of the structure of the vehicle body of the present invention;

[0024] Figure 6This is a top view of the sub-vehicle body of the present invention;

[0025] Figure 7 This is a schematic diagram of the anti-collision component of the present invention;

[0026] Figure 8 This is a schematic diagram of the internal structure of the anti-collision component of the present invention.

[0027] In the diagram: 1. Mother car track; 2. Mother car body; 21. Mother car frame; 22. Anti-collision bumper; 23. Fixing rod; 24. Anti-collision component; 240. Anti-collision plate; 241. Sliding rod; 242. Connecting spring; 243. Through hole; 244. Slot; 245. Swing shaft; 246. Swing plate; 247. Inverted U-shaped mating block; 25. Mother car moving drive component; 250. Mother car motor; 251. Universal joint coupling; 26. Tilting pair Components: 260. Tilting drive motor; 261. Output shaft; 262. Driving arm; 263. Driven arm; 264. Connecting rod; 265. Tilting rod; 266. Rotating shaft; 267. Tilting seat; 3. Sub-carriage track; 4. Sub-carriage body; 41. Sub-carriage frame; 410. Frame slot; 42. Sub-carriage moving drive component; 420. Sub-carriage motor; 421. Sub-spindle; 43. Hydraulic lifting component; 430. Hydraulic cylinder; 431. Lifting plate. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this invention should have the ordinary meaning understood by those skilled in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figures 1 to 8As shown, a mother car and daughter car include a mother car body 2, with a mother car track 1 below the mother car body 2 to restrict movement. The mother car body 2 moves along the mother car track 1 and is movably positioned on the mother car track 1. A daughter car body 4 is supported on the mother car body 2. A daughter car track 3 for restricting the movement of the daughter car body 4 is installed on the mother car body 2. The daughter car body 4 moves along the daughter car track 3 and is movably positioned on the daughter car track 3. The movement direction of the mother car track 1 and the movement direction of the daughter car track 3 are set at an angle. A flip-connecting member 26 is provided on the mother car body 2. The flip-connecting member 26 includes a flip seat 267 disposed at the end of the daughter car track 3. The flip seat 267 is arranged along the extension direction of the daughter car track 3. The end of 267 away from the sub-carriage track 3 is hinged to a flipping rod 265 via a rotating shaft 266. The rotating shaft 266 is connected to a driving member, which controls the rotation of the rotating shaft 266. The flipping docking member 26 has a first state and a second state. In the first state, the flipping rod 265 is rotated to be horizontally parallel to the flipping seat 267, and the upper end face of the flipping rod 265 is flush with the upper end face of the flipping seat 267. The sub-carriage body 4 can move on the flipping rod 265 and the flipping seat 267, and the sub-carriage body 4 moves out of the sub-carriage track 3 through the flipping seat 267 and the flipping rod 265. In the second state, the flipping rod 265 is rotated and lifted to be tilted upward, and the flipping rod 265 restricts the sub-carriage body 4 from moving out of the sub-carriage track 3.

[0031] The flip-over docking parts 26 of this device are symmetrically arranged at both ends of the extension of the subcar track 3. After flipping, they can form a double-sided limiting barrier, which simultaneously blocks the subcar body 4 from both ends of the subcar track 3, avoiding the risk of the subcar body 4 sliding sideways or getting off the track due to inertia, bumps or lateral forces. The anti-get-off protection is comprehensive, the safety is high, and the accident rate is greatly reduced.

[0032] When the subcar body 4 needs to enter or exit the subcar track 3, the tilting rod 265 tilts downward and is horizontally set with the tilting seat 267. The tilting seat 267 and the tilting rod 265 are both located at the extension of the subcar track 3. The tilting seat 267 and the tilting rod 265 serve as extensions of the subcar track 3 to facilitate the normal travel and connection of the subcar body 4. During the transportation of the mother car, the tilting rod 265 tilts upward to the limit position to quickly form protection. No additional manual fixing or disassembly is required, making the operation highly efficient and suitable for automated operation scenarios.

[0033] The double-sided flip-and-connector 26 of the subcarriage track 3 can effectively offset the lateral impact force of the subcarriage body 4 during operation, reduce the movement and shaking of the subcarriage body 4, ensure the stability of the subcarriage body 4 on the mother car body 2, avoid cargo tipping and collision damage, reduce the collision wear between the subcarriage body 4 and the subcarriage track 3, extend the service life of the equipment, reduce maintenance downtime, improve transportation stability, and protect the goods and equipment.

[0034] This mother-daughter vehicle has a simple structure, is easy to operate, provides comprehensive protection, and does not affect the normal operation of the daughter vehicle, thus improving the safety and efficiency of mother-daughter vehicle transportation.

[0035] The driving component includes a tilting drive motor 260 disposed below the tilting seat 267 and mounted on the mother car body 2. The output end of the tilting drive motor 260 is connected to an output shaft 261. An active arm 262 is fixedly connected to the side wall of the output shaft 261. A tilting rod 265 is fixed on the side wall of the rotating shaft 266. A driven arm 263 is fixedly connected to the side wall of the rotating shaft 266. A connecting rod 264 is hinged between the active arm 262 and the driven arm 263. The active arm 262 and the driven arm 263 are rotatably connected to the two ends of the connecting rod 264, respectively. When the tilting drive motor 260 is started, it facilitates the tilting rod 265 to tilt. In the first state, the tilting rod 265 is rotated to be horizontally parallel to the tilting seat 267, and the daughter car body 4 can move along the daughter car track 3 through the tilting seat 267 and the tilting rod 265. In the second state, the tilting rod 265 is rotated and lifted to tilt upwards, and the tilting rod 265 restricts the daughter car body 4 from moving off the daughter car track 3.

[0036] The head and tail of the mother car body 2 and the head and tail of the daughter car body 4 are each provided with anti-collision components 24. Each anti-collision component 24 includes an anti-collision plate 240 located on one side of the head and / or the tail of the mother car body 2 and / or the daughter car body 4. A sliding rod 241 is connected to the end face of the anti-collision plate 240. A through hole 243 is provided on the mother car body 2 and / or the daughter car body 4 for the sliding rod 241 to pass through. A slot 244 is coaxially formed at one end of the through hole 243 near the anti-collision plate 240. A connecting spring 242 is sleeved on the outside of the sliding rod 241. The connecting spring 242 is located between the end face of the anti-collision plate 240 and the bottom of the slot 244. A receiving groove communicating with the through hole 243 is provided on the lower end face of the mother car body 2 and / or the daughter car body 4. A swing arm is hinged to the end of the sliding rod 241 away from the anti-collision plate 240 and accommodated in the receiving groove. The swing plate 246 is rotatably connected to the side wall of the receiving groove via a swing shaft 245. After the anti-collision plate 240 is impacted, the connecting spring 242 is compressed, and the anti-collision plate 240 drives the sliding rod 241 to move towards the swing plate 246, causing the swing plate 246 to rotate around the swing shaft 245. The lower end of the swing plate 246 contacts the upper surface of the mother car track 1 or the daughter car track 3 to provide rail top support, reducing the travel path of the mother car body 2 and daughter car body 4 after being impacted, facilitating braking of the mother car body 2 and daughter car body 4. Excess impact force is directly transmitted to the mother car track 1 or daughter car track 3 through the swing plate 246 to share the impact load and protect other components. Regardless of whether the collision occurs on the mother car track 1 or the daughter car track 3, the lower end of the swing plate 246 can adaptively conform to the mother car track 1 or the daughter car track 3, providing stable support in both working conditions. It has strong versatility and high fault tolerance.

[0037] The lower end of the swing plate 246 is connected to an inverted U-shaped mating block 247, and the groove provided at the lower end of the inverted U-shaped mating block 247 is configured to mate with the mother car track 1 or the daughter car track 3.

[0038] An elastic pad is provided in the groove of the inverted U-shaped mating block 247 to reduce wear when the inverted U-shaped mating block 247 comes into contact with the mother car track 1 or the daughter car track 3.

[0039] Both the front and rear of the mother vehicle body 2 are equipped with anti-collision bumpers 22. The anti-collision bumpers 22 are fixedly connected to the anti-collision plate 240 through fixing rods 23, which facilitates anti-collision and protects the mother vehicle body 2.

[0040] The mother car body 2 includes a mother car frame 21, and a mother car wheel is provided at the bottom of the mother car frame 21. The mother car wheel moves along the mother car track 1 and is movably positioned on the mother car track 1. The mother car wheel includes a mother driving wheel and a mother driven wheel. The mother car body 2 is provided with a mother car moving drive component 25 for controlling the rotation of the mother driving wheel. The mother car moving drive component 25 includes a mother car motor 250 installed on the mother car frame 21. The output end of the mother car motor 250 is connected to the mother driving wheel through a universal joint coupling 251. When the mother car motor 250 is started, it drives the mother driving wheel to rotate, thereby driving the mother car body 2 to move along the mother car track 1.

[0041] The trolley body 4 includes a trolley frame 41, which has multiple frame slots 410. A hydraulic lifting component 43 is provided at each frame slot 410. The hydraulic lifting component 43 includes a hydraulic cylinder 430. The telescopic end of the hydraulic cylinder 430 is connected to a lifting plate 431 for lifting items. When the hydraulic cylinder 430 is activated, it extends to facilitate the upward movement of the lifting plate 431, which is convenient for lifting items. The hydraulic lifting component 43 is used to pick up and put down goods after the trolley body 4 moves to its destination.

[0042] The bottom of the subcarriage frame 41 is provided with subcarriage wheels. The subcarriage wheels move along the subcarriage track 3 and are movably mounted on the subcarriage track 3. The subcarriage wheels include a sub-driving wheel and a sub-driven wheel. The subcarriage body 4 is provided with a subcarriage movement drive 42 for controlling the rotation of the sub-driving wheel. The subcarriage movement drive 42 includes a subcarriage motor 420 mounted on the subcarriage frame 41. One side of the output end of the subcarriage motor 420 is drivenly connected to a sub-main shaft 421. The end of the sub-main shaft 421 is drivenly connected to the sub-driving wheel. When the subcarriage motor 420 is started, it drives the sub-driving wheel to rotate through the sub-main shaft 421, thereby driving the subcarriage body 4 to move along the subcarriage track 3.

[0043] The sub-carriage frame 41 is equipped with a sub-electrical control cabinet and a first cable reel. A first cable is wound on the first cable reel. The sub-electrical control cabinet is electrically connected to one end of the first cable, and the other end of the first cable is electrically connected to the sub-carriage motor 420. The sub-carriage frame 41 is enclosed by a frame around the sub-electrical control cabinet to facilitate the protection of the sub-electrical control cabinet.

[0044] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples. The invention is not limited to the above-described embodiments, that is, it does not mean that the invention must rely on the above methods and structures to be implemented. Under the concept of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in the details for the sake of brevity.

[0045] The embodiments of this invention are intended to cover all such substitutions, modifications, and variations falling within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A mother car and daughter car, comprising a mother car body (2), a mother car track (1) for restricting movement is provided below the mother car body (2), the mother car body (2) moves along the mother car track (1), a daughter car body (4) is supported on the mother car body (2), a daughter car track (3) for restricting the movement of the daughter car body (4) is installed on the mother car body (2), the daughter car body (4) moves along the daughter car track (3), the direction of movement of the mother car track (1) is set at an angle to the direction of movement of the daughter car track (3), characterized in that, The mother car body (2) is provided with a flip-over docking component (26); the flip-over docking component (26) includes a flip-over seat (267) provided at the end of the daughter car track (3), the flip-over seat (267) is arranged along the extension direction of the daughter car track (3), and a flip-over rod (265) is hinged to the end of the flip-over seat (267) away from the daughter car track (3) through a rotating shaft (266), and a driving component is driven by the rotating shaft (266) to control the rotation of the rotating shaft (266); the flip-over docking component (267) is provided with a flip-over docking component (267) to control the rotation of the rotating shaft (266) to control the rotation of the daughter car track (3 ... The component (26) has a first state and a second state. In the first state, the flipping rod (265) is rotated to be horizontally parallel to the flipping seat (267), and the subcarriage body (4) can move on the flipping rod (265) and the flipping seat (267). The subcarriage body (4) moves out of the subcarriage track (3) through the flipping seat (267) and the flipping rod (265). In the second state, the flipping rod (265) is rotated and raised to be tilted upward, and the flipping rod (265) restricts the subcarriage body (4) from moving out of the subcarriage track (3).

2. A mother-daughter vehicle according to claim 1, characterized in that, The head and tail of the mother car body (2) are provided with anti-collision components (24) for collision prevention. The anti-collision component (24) includes an anti-collision plate (240) located on one side of the mother car body (2). A sliding rod (241) is connected to the end face of the anti-collision plate (240). A through hole (243) for the sliding rod (241) to pass through is provided on the mother car body (2). A slot (244) is coaxially provided at one end of the through hole (243) near the anti-collision plate (240). The sliding rod (241) A connecting spring (242) is sleeved on the outside. The connecting spring (242) is located between the end face of the anti-collision plate (240) and the bottom of the slot (244). The lower end face of the mother car body (2) is provided with a receiving groove communicating with the through hole (243). The end of the sliding rod (241) away from the anti-collision plate (240) is hinged to a swing plate (246) that is accommodated in the receiving groove. The middle part of the swing plate (246) is rotatably connected to the side wall of the receiving groove through a swing shaft (245).

3. A mother-daughter vehicle according to claim 2, characterized in that, The lower end of the swing plate (246) is connected to an inverted U-shaped mating block (247), and the groove at the lower end of the inverted U-shaped mating block (247) is mated with the mother car track (1).

4. A mother-daughter vehicle according to claim 3, characterized in that, An elastic pad is provided in the groove of the inverted U-shaped mating block (247).

5. A mother-daughter vehicle according to claim 2, characterized in that, The head and tail of the mother vehicle body (2) are equipped with anti-collision bumpers (22), and the anti-collision bumpers (22) are fixedly connected to the anti-collision plate (240) by fixing rods (23).

6. A mother-daughter vehicle according to claim 1, characterized in that, The mother car body (2) includes a mother car frame (21), and a mother car wheel is provided at the bottom of the mother car frame (21). The mother car wheel moves along the mother car track (1). The mother car wheel includes a mother driving wheel and a mother driven wheel. The mother car body (2) is provided with a mother car moving drive (25) for controlling the rotation of the mother driving wheel. The mother car moving drive (25) includes a mother car motor (250) installed on the mother car frame (21). The output end of the mother car motor (250) is connected to the mother driving wheel through a universal joint coupling (251).

7. A mother-daughter vehicle according to claim 6, characterized in that, The vehicle body (4) includes a vehicle frame (41), the vehicle frame (41) is provided with a plurality of frame slots (410), a hydraulic lifting component (43) is provided at the frame slot (410), the hydraulic lifting component (43) includes a hydraulic cylinder (430), and the telescopic end of the hydraulic cylinder (430) is connected to a lifting plate (431) for lifting items.

8. A mother-daughter vehicle according to claim 7, characterized in that, The bottom of the subcar frame (41) is provided with subcar wheels, which move along the subcar track (3). The subcar wheels include a sub-driving wheel and a sub-driven wheel. The subcar body (4) is provided with a subcar movement drive (42) for controlling the rotation of the sub-driving wheel. The subcar movement drive (42) includes a subcar motor (420) mounted on the subcar frame (41). The output end of the subcar motor (420) is connected to a sub-main shaft (421), and the end of the sub-main shaft (421) is connected to the sub-driving wheel.

9. A mother-daughter vehicle according to claim 1, characterized in that, The driving component includes a tilting drive motor (260) disposed below the tilting seat (267) and mounted on the mother car body (2). The output end of the tilting drive motor (260) is connected to an output shaft (261). An active arm (262) is fixedly connected to the side wall of the output shaft (261). The tilting rod (265) is fixed on the side wall of the rotating shaft (266). A driven arm (263) is fixedly connected to the side wall of the rotating shaft (266). A connecting rod (264) is hinged between the active arm (262) and the driven arm (263).

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