A four-way shuttle vehicle and a four-way shuttle system

Abstract

The application discloses a four-way shuttle vehicle and a four-way shuttle system. The shuttle vehicle comprises a vehicle body, a lifting support plate arranged at the top end of the vehicle body, a power transmission assembly and a main wheel assembly. The power transmission assembly comprises a motor fixed to the vehicle body, two transmission shafts arranged on both sides of the motor, two ratchet sprocket transmission units and two cam transmission units. Each ratchet sprocket transmission unit is in transmission connection between the output shaft of the motor and the transmission shaft, one transmission shaft is driven to rotate by the clockwise rotation of the motor, and the other transmission shaft is driven to rotate by the counterclockwise rotation of the motor. The second cam is located below the lifting support plate and abuts against the lifting support plate, the second cam drives the lifting support plate to lift when the second cam rotates, the main wheel assembly is connected with the first cam, and the first cam drives the main wheel assembly to lift and change direction when the first cam rotates. The coupling of the lifting and reversing functions of the four-way shuttle vehicle is realized by adjusting the rotation direction of the motor, and the four-way shuttle vehicle has the advantages of simple structure and low production cost.

Description

Technical Field

[0001] This application relates to the field of intelligent warehousing technology, and in particular to a four-way shuttle and a four-way shuttle system. Background Technology

[0002] Four-way shuttles possess advantages such as small size, flexible implementation, high storage density, and applicability to a wider range of warehouse types, making them irreplaceable in the field of automated storage and retrieval systems (AS / RS). Currently, most mainstream four-way shuttles on the market employ a hydraulic structure to achieve lifting and reversing functions, which presents challenges in practical applications, including structural complexity and high production costs. Summary of the Invention

[0003] In view of the above problems, this application is made in order to provide a four-way shuttle and a four-way shuttle system that overcome or at least partially solve the above problems.

[0004] This application provides a four-way shuttle vehicle, the shuttle vehicle comprising:

[0005] Vehicle body,

[0006] A lifting pallet, which is installed at the top of the vehicle body, is used to support cargo.

[0007] The power transmission assembly includes:

[0008] An electric motor, which is fixed to the vehicle body;

[0009] Two drive shafts are located on both sides of the motor and are arranged parallel to the output shaft of the motor.

[0010] Two ratchet sprocket drive units are provided, each ratchet sprocket drive unit connects the output shaft of the motor to each drive shaft, wherein each drive shaft passes through each ratchet sprocket drive unit, and when the motor rotates clockwise, it drives one drive shaft to rotate, and when the motor rotates counterclockwise, it drives the other drive shaft to rotate.

[0011] Two cam drive units, each cam drive unit includes:

[0012] A transmission box, which is fixed to the vehicle body, and a drive shaft that passes through the transmission box and is rotatably connected to the transmission box;

[0013] A first bevel gear set and a second bevel gear set are installed inside the transmission box. The first bevel gear set is connected to one of the transmission shafts, and the second bevel gear set is connected to the other transmission shaft.

[0014] The first cam is rotatably connected to the outside of the transmission box and is connected to the first bevel gear set in a transmission connection.

[0015] The second cam is rotatably connected to the inside of the transmission box and is connected to the second bevel gear set. The second cam is located below the lifting plate and abuts against the lifting plate. When the second cam rotates, it drives the lifting plate to lift.

[0016] A main track wheel assembly is connected to a first cam, and the rotation of the first cam drives the main track wheel assembly to rise and fall to change direction.

[0017] Optionally, the ratchet sprocket drive unit includes:

[0018] A drive sprocket, which is sleeved on the output shaft of the motor and coaxially connected to the output shaft of the motor;

[0019] A chain that meshes with the drive sprocket;

[0020] A ratchet mechanism is sleeved on the drive shaft and coaxially arranged with the drive shaft. The ratchet mechanism meshes with a chain, and a transmission connection between the drive sprocket and the ratchet mechanism is formed through the chain.

[0021] Optionally, the ratchet mechanism includes:

[0022] Wheel cover,

[0023] The inner ring of the wheel is rotatably connected to the wheel cover and is sleeved on the drive shaft and fixed to the drive shaft.

[0024] Driven sprocket, the driven sprocket is sleeved on the wheel cover and rotatably connected to the wheel cover;

[0025] Multiple pins are distributed at equal angles around the center of the driven sprocket on the inner circumference side of the driven sprocket, and the pins are rotatably connected to the driven sprocket.

[0026] Multiple pawls, each pawl being fixedly connected to the pin, and a toothed groove adapted to the shape of the pawl is provided on the outer circumference of the inner ring of the wheel;

[0027] When the driven sprocket rotates, it drives the pawl to slide along the inner ring of the sprocket, or it drives the pawl to engage with the inner ring of the sprocket to drive the drive shaft to rotate.

[0028] Optionally, both the driving sprocket and the driven sprocket are double-row sprockets.

[0029] Optionally, the cross-sectional shape of the first cam and the second cam is an eccentric annulus.

[0030] Optionally, the shuttle vehicle further includes:

[0031] A first contact plate is fixedly connected to a first cam and contacts the outer side of the transmission box, wherein the main guide wheel assembly is mounted on the first contact plate.

[0032] Optionally, the first contact plate is further provided with a guide sleeve, which is installed vertically and slidably fitted on the vehicle body to limit the movement path of the first contact plate.

[0033] Optionally, the vehicle body further includes:

[0034] Base plate;

[0035] Two first side plates are arranged opposite each other and extend vertically on the base plate. The main wheel assembly is slidably connected to the opposite end faces of the two first side plates.

[0036] Two second side plates are arranged opposite each other and extend vertically on the base plate. The two second side plates, the two first side plates, and the base plate form an upward-opening mounting cavity, in which the power transmission components are all installed.

[0037] Optionally, the shuttle vehicle further includes:

[0038] The guide wheel assembly is rotatably connected to the opposite end faces of two second side plates.

[0039] Optionally, the lifting support plate includes:

[0040] The second contact plate abuts against the second cam;

[0041] A guide shaft is slidably sleeved on the vehicle body to limit the movement path of the second contact plate.

[0042] This application also provides a four-way shuttle system, including a four-way shuttle as described in any of the above claims and a track for the four-way shuttle to travel on, wherein the track includes a main track and a secondary track perpendicular to the main track.

[0043] Compared to existing technologies, the shuttle vehicle includes a vehicle body, a lifting platform mounted on the top of the vehicle body, a power transmission assembly, and a main track wheel assembly. The power transmission assembly includes a motor fixed to the vehicle body, two drive shafts located on either side of the motor, two ratchet sprocket transmission units, and two cam transmission units. The drive shafts are parallel to the motor's output shaft. Each ratchet sprocket transmission unit connects the motor's output shaft to each drive shaft; clockwise rotation of the motor drives one drive shaft, and counterclockwise rotation drives the other drive shaft. Each cam transmission unit includes a transmission box fixed to the vehicle body, a first bevel gear set and a second bevel gear set installed within the transmission box, a first cam rotatably connected to the outside of the transmission box, and a second cam rotatably connected to the inside of the transmission box. One drive shaft and the first cam are connected via the first bevel gear set, and the other drive shaft and the second cam are connected via the second bevel gear set. The second cam is located below the lifting platform and abuts against it. When the second cam rotates, it drives the lifting platform to rise. The main track wheel assembly is connected to the first cam, and when the first cam rotates, it drives the main track wheel assembly to rise and fall to change direction. The lifting and reversing functions of the four-way shuttle are coupled by adjusting the rotation direction of the motor, which has the advantages of simple structure and low production cost.

[0044] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0045] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings.

[0046] In the attached diagram:

[0047] Figure 1 This is a three-dimensional structural diagram of a four-way shuttle provided in an embodiment of this application;

[0048] Figure 2 This is a first structural schematic diagram of a power transmission component provided in an embodiment of this application;

[0049] Figure 3 This is a schematic diagram of the second structure of a power transmission component provided in an embodiment of this application;

[0050] Figure 4This is a schematic diagram of the first structure of a cam transmission unit provided in an embodiment of this application;

[0051] Figure 5 This is a schematic diagram of the second structure of a cam transmission unit provided in an embodiment of this application;

[0052] Figure 6 This is a three-dimensional structural diagram of a ratchet mechanism provided in an embodiment of this application;

[0053] Figure 7 This is a front view of a ratchet mechanism provided in an embodiment of this application;

[0054] Figure 8 This is a schematic diagram of the cross-sectional structure of a first cam provided in an embodiment of this application;

[0055] Figure 9 This is a side view of a cam drive unit provided in an embodiment of this application;

[0056] Figure 10 This is a schematic diagram of an example structure of a lifting platform provided in an embodiment of this application.

[0057] Reference numerals: 1. Vehicle body; 11. Floor plate; 12. First side plate; 13. Second side plate; 2. Lifting support plate; 21. Second contact plate; 22. Guide shaft; 3. Power transmission assembly; 31. Motor; 32. Drive shaft; 33. Ratchet and sprocket transmission unit; 331. Drive sprocket; 332. Chain; 333. Ratchet mechanism; 3331. Wheel cover; 3332. Inner wheel ring; 3333. Driven sprocket; 3334. Pin; 333 5. Pawl; 34. Cam drive unit; 341. Transmission box; 342. First bevel gear set; 3421. First bevel gear pair; 3422. Conversion drive shaft; 3423. Second bevel gear pair; 3424. Third bevel gear pair; 3425. Conversion output shaft; 343. Second bevel gear set; 344. First cam; 345. Second cam; 4. Main guide wheel assembly; 5. First contact plate; 51. Guide sleeve; 6. Slave guide wheel assembly. Detailed Implementation

[0058] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the present application to those skilled in the art.

[0059] This application provides a four-way shuttle system, which includes a four-way shuttle as described in any of the following embodiments and a track for the four-way shuttle to travel on. The track may include a main track and secondary tracks perpendicular to the main track.

[0060] Reference Figure 1-10 This application provides a four-way shuttle, which may include a vehicle body 1, a lifting pallet 2 disposed at the top of the vehicle body 1, a power transmission assembly 3, and a main track wheel assembly 4. The vehicle body 1 supports the installation of various components, and the lifting pallet is used to receive goods. The power transmission assembly 3 provides power for both lifting and reversing of the shuttle, and the main track wheel assembly 4 is used for the shuttle to travel on the main track. The power transmission assembly 3 may include a motor 31, two drive shafts 32, two ratchet sprocket transmission units 33, and two cam transmission units 34. The motor 31 outputs rotational power in two directions, the drive shafts 32 transmit the rotational power to the cam transmission units 34, and the two ratchet sprocket transmission units 33 transmit the rotational power in different directions to different drive shafts 32 respectively. Wherein:

[0061] Reference Figure 2 and Figure 3 As shown, the motor 31 can be a servo motor, which is fixed to the vehicle body 1. Two drive shafts 32 are located on both sides of the motor 31 and are arranged parallel to the output shaft of the motor 31. Each drive shaft passes through each ratchet sprocket transmission unit 33, and each ratchet sprocket transmission unit 33 connects the output shaft of the motor 31 to each drive shaft 32. Under the action of the two ratchet sprocket transmission units, when the motor 31 rotates clockwise, it drives one of the drive shafts 32 to rotate, while the other drive shaft 32 remains stationary. When the motor 31 rotates counterclockwise, one drive shaft 32 remains stationary, while driving the other drive shaft 32 to rotate.

[0062] Reference Figure 4 As shown, each cam transmission unit 34 may include a transmission housing 341, a first bevel gear set 342, a second bevel gear set 343, a first cam 344, and a second cam 345, wherein:

[0063] The transmission housing 341 is fixed to the vehicle body 1, and the transmission shaft 32 passes through the transmission housing 341 and is rotatably connected to the transmission housing 341. The first bevel gear set 342 and the second bevel gear set 343 are installed inside the transmission housing 341, wherein the first bevel gear set 342 is tractively connected to one of the transmission shafts 32, and the second bevel gear set 343 is tractively connected to the other transmission shaft 32. The first cam 344 is rotatably connected to the outside of the transmission housing 341 and is tractively connected to the first bevel gear set 342, wherein the main guide wheel assembly 4 is connected to the first cam 344.

[0064] The second cam 345 is rotatably connected to the inner side of the transmission box 341 and is drively connected to the second bevel gear set 343. The second cam 345 is located below the lifting support plate 2 and abuts against the lifting support plate 2. Both the first bevel gear set 342 and the second bevel gear set 343 may include multiple bevel gears for changing the rotation direction of the transmission shaft 32. This allows the rotation direction of the first cam 344 and the second cam 345 to be consistent with the rotation direction of the transmission shaft 32. When the first cam 344 rotates, it drives the main guide wheel assembly 4 to rise and fall to change direction. When the second cam 345 rotates, it drives the lifting support plate 2 to lift.

[0065] The shuttle can be lifted and loaded with goods while traveling on the main road or the secondary road, improving its adaptability to different scenarios. A single motor 31 can simultaneously achieve both lifting and reversing of the shuttle, simplifying the structure and reducing production costs. Compared to the hydraulic structures commonly used in existing technologies for lifting and reversing, this shuttle also avoids the risk of oil leaks, reducing maintenance costs.

[0066] An optional embodiment of the invention, referring to... Figure 6 and Figure 7As shown, the ratchet sprocket transmission unit 33 may include a drive sprocket 331, a chain 332, and a ratchet mechanism 333. The drive sprocket 331 is sleeved on the output shaft of the motor 31 and coaxially connected to the output shaft of the motor 31. Coaxial connection (or arrangement) means that the central axes of the two components are collinear. The chain 332 meshes with the drive sprocket 331, and the ratchet mechanism 333 is sleeved on the transmission shaft 32 and coaxially arranged with the transmission shaft 32. The ratchet mechanism 333 meshes with the chain 332, forming a transmission connection between the drive sprocket 331 and the ratchet mechanism 333 through the chain 332. When the motor 31 rotates, it drives the drive sprocket 331 to rotate and transmits the rotational motion to the ratchet mechanism 333 through the chain 332. Two ratchet mechanisms 333 are respectively mounted on two drive shafts 32, so that the rotational power output by the motor 31 in different directions is output to different drive shafts 32 through the ratchet mechanisms 333.

[0067] In one optional embodiment of the invention, the ratchet mechanism 333 may include a wheel cover 3331, an inner wheel ring 3332, a driven sprocket 3333, multiple pins 3334, and multiple pawls 3335. The inner wheel ring 3332 is rotatably connected to the wheel cover 3331, and is sleeved on and fixed to the drive shaft 32. The driven sprocket 3333 is sleeved on and rotatably connected to the wheel cover 3331. Multiple pins 3334 are evenly distributed around the center of the driven sprocket 3333 on its inner circumference, and are rotatably connected to the driven sprocket 3333. Those skilled in the art can determine the number of pins 3334 according to the application scenario; no limitation is made here. For example, the number of pins 3334 may be 3, 4, or 5, etc. Each pawl 3335 is fixedly connected to the pin 3334, and a toothed groove adapted to the shape of the pawl 3335 is formed on the outer circumference of the inner ring 3332. Furthermore, multiple limiting blocks for adjusting the movement trajectory of the pawl 3335 are provided on the inner circumference of the driven sprocket 3333. The pawl 3335 is installed in a limiting cavity between two adjacent limiting blocks.

[0068] Reference Figure 7 As shown, when the driven sprocket 3333 is not rotating, the tip of the pawl 3335 is located inside the inner circumference of the driven sprocket 3333. When the driven sprocket 3333 rotates counterclockwise, the pawl 3335, under the rotational force of the driven sprocket 3333, rotates closer to the inner ring 3332 and extends into the tooth groove on the outer circumference of the inner ring 3332 to engage with the tooth groove.

[0069] In one example, when motor 31 rotates clockwise, it drives one of the driven sprockets 3333 to rotate, causing the pawl 3335 on one of the driven sprockets 3333 to rotate and engage with the inner ring 3332, thereby driving one of the drive shafts 32 to rotate and transmit rotational power to the cam drive unit 34. The pawl 3335 on the other drive shaft 32 slides along the outer ring and does not engage with the inner ring 3332, thus not driving the other drive shaft 32 to rotate. Similarly, in another example, when motor 31 rotates counterclockwise, the pawl 3335 on one of the drive shafts 32 slides along the outer ring and does not engage with the inner ring 3332, thus not driving one of the drive shafts to rotate. The pawl 3335 located on another drive shaft 32 rotates and engages with the inner ring 3332 of the wheel, thereby driving the other drive shaft 32 to rotate, so that the other drive shaft 32 transmits rotational power to the cam drive unit 34.

[0070] Preferably, both the driving sprocket 331 and the driven sprocket 3333 are double-row sprockets. The double-row sprocket design allows the driving sprocket 331 and the driven sprocket 3333 to withstand greater torque, thereby improving the structural stability of the shuttle.

[0071] An optional embodiment of the invention, referring to... Figure 8 As shown, for ease of manufacturing, the cross-sectional shape of the first cam 344 and the second cam 345 is an eccentric ring. Mounting shafts are fixedly installed at the eccentric positions on the first cam 344 and the second cam 345. The mounting shaft on the first cam 344 is connected to the main guide wheel assembly 4, and the mounting shaft on the second cam 345 abuts against the lifting support plate 2. Each cam transmission unit 34 can have two first cams 344 and two second cams 345. To improve the connection stability between the first cam 344 and the main guide wheel assembly 4, refer to... Figure 9 As shown, the shuttle may also include a first contact plate 5, which is fixedly connected to the mounting shaft of the first cam 344 and contacts the outer side of the transmission box 341, wherein the main track wheel assembly 4 is mounted on the first contact plate 5.

[0072] The first contact plate 5 is also provided with a guide sleeve 51. The guide sleeve 51 is vertically installed and slidably fitted onto the vehicle body 1 to limit the movement path of the first contact plate 5. That is, when the first cam 344 converts the rotational motion into linear motion under the transmission shaft 32 to drive the first contact plate 5 to rise and fall, the guide sleeve 51 shares the component force generated during the motion conversion process, so that the first contact plate 5 will not deviate in the horizontal direction when rising and falling. A corresponding sliding component can be provided on the vehicle body 1 so that the sliding component and the guide sleeve 51 slide together to form a straight guide rail structure; no further limitations are made here.

[0073] An optional embodiment of the invention, referring to... Figure 1 As shown, the vehicle body 1 may further include a base plate 11, two first side plates 12, and two second side plates 13. The two first side plates 12 are arranged opposite each other and extend vertically on the base plate 11. The main wheel assembly 4 is slidably connected to the opposite end faces of the two first side plates 12. The two second side plates 13 are arranged opposite each other and extend vertically on the base plate 11. The two second side plates 13, the two first side plates 12, and the base plate 11 form an upward-opening mounting cavity. The power transmission assembly 3 is installed in the mounting cavity, which can protect the power transmission assembly 3. The main wheel assembly 4 is located outside the mounting cavity. The shuttle may further include a driven wheel assembly 6, which is rotatably connected to the opposite end faces of the two second side plates 13, i.e., located outside the mounting cavity. The main track wheel assembly 4 or the secondary track wheel assembly 6 lifts the entire vehicle body 1, thereby moving the four-way shuttle along the main track or secondary track via the main track wheel assembly 4 or the secondary track wheel assembly 6. The main track wheel assembly 4 includes multiple main tracks, and the secondary track wheel assembly 6 includes multiple secondary tracks. When the height of the secondary track wheel above the ground is less than the height of the main track wheel above the ground, the shuttle travels along the secondary track. When a change of direction is required, the motor 31 rotates, driving the first cam 344 to rotate, causing the main track wheel to move to a height below the height of the secondary track wheel above the ground, thereby allowing the shuttle to travel along the main track.

[0074] An optional embodiment of the invention, referring to... Figure 10 As shown, the lifting plate 2 may include a second contact plate 21 and a guide shaft 22, with the second contact plate 21 abutting against a second cam 345. The guide shaft 22 is vertically mounted and slidably sleeved on the vehicle body 1, thereby limiting the movement path of the second contact plate 21. That is, when the second cam 345 drives the lifting plate 2 to rise and fall under the transmission of the drive shaft 32, no horizontal offset will occur. Corresponding sliding components may be provided on the vehicle body 1, such that the sliding components and the guide shaft 22 slide together to form a straight guide rail structure; however, no further limitations are imposed here.

[0075] An optional embodiment of the invention, referring to... Figure 4 As shown, the first bevel gear set 342 and the second bevel gear set 343 can have the same structure. For example, the first bevel gear set 342 may include a first bevel gear pair 3421, a conversion drive shaft 3422, a second bevel gear pair 3423, a third bevel gear pair 3424, and two conversion output shafts 3425. Furthermore, the rotation conversion angle of the first bevel gear pair 3421, the second bevel gear pair 3423, and the third bevel gear pair 3424 is 90°. The conversion drive shaft 3422 is perpendicular to the transmission shaft 32 and is rotatably connected to the transmission housing 341 via a conversion bearing support. The second bevel gear pair 3423 and the third bevel gear pair 3424 have the same structure and are mounted on both sides of the conversion drive shaft 3422. The transmission shaft 32 is connected to the first bevel gear, and the two conversion output shafts 3425 are respectively connected to the second bevel gear pair 3423 and the third bevel gear pair 3424. This allows the rotational motion input from one of the drive shafts 32 to be converted into two rotational forces with opposite directions of rotation via the first bevel gear pair 3421, the second bevel gear pair 3423, and the third bevel gear pair 3424, and then transmitted to the first cam 344 via two conversion output shafts 3425. Similarly, rotational power is transmitted to the second cam 345 via the two conversion output shafts 3425 of the second bevel gear set 343.

[0076] In summary, this application discloses a four-way shuttle and a four-way shuttle system. The shuttle includes a vehicle body 1, a lifting platform 2 mounted on the top of the vehicle body 1, a power transmission assembly 3, and a main track wheel assembly 4. The power transmission assembly 3 includes a motor 31 fixed to the vehicle body 1, two drive shafts 32 mounted on both sides of the motor 31, two ratchet sprocket transmission units 33, and two cam transmission units 34. The drive shafts 32 are parallel to the output shaft of the motor 31. Each ratchet sprocket transmission unit 33 connects the output shaft of the motor 31 to each drive shaft 32. When the motor 31 rotates clockwise, it drives one of the drive shafts 32 to rotate; when the motor 31 rotates counterclockwise, it drives the other drive shaft 32 to rotate. Each cam drive unit 34 includes a drive box 341 fixed to the vehicle body 1, a first bevel gear set 342 and a second bevel gear set 343 installed inside the drive box 341, a first cam 344 rotatably connected to the outside of the drive box 341, and a second cam 345 rotatably connected to the inside of the drive box 341. One drive shaft 32 and the first cam 344 are connected via the first bevel gear set 342, while the other drive shaft 32 and the second cam 345 are connected via the second bevel gear set 343. The second cam 345 is located below the lifting plate 2 and abuts against it. When the second cam 345 rotates, it drives the lifting plate 2 to lift. The main track wheel assembly 4 is connected to the first cam 344, and when the first cam 344 rotates, it drives the main track wheel assembly 4 to rise and fall to change direction. The coupling of the four-way shuttle's lifting and reversing functions is achieved by adjusting the rotation direction of the motor 31, offering advantages such as simple structure and low production cost.

[0077] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0078] It will be readily apparent to those skilled in the art that any combination of the above embodiments is feasible. Therefore, any combination of the above embodiments is an implementation scheme of this application. However, due to space limitations, this specification will not describe them in detail here.

[0079] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0080] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more of the various aspects of the invention, in the description of exemplary embodiments of this application above, various features of this application are sometimes grouped together into a single embodiment, figure, or description thereof.

[0081] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

Claims

1. A four-way shuttle vehicle, characterized in that, The shuttle vehicle includes: Vehicle body (1), Lifting pallet (2), which is located at the top of the vehicle body (1) and is used to support the cargo; A power transmission assembly (3), the power transmission assembly (3) comprising: Motor (31), said motor (31) is fixed to the vehicle body (1); Two drive shafts (32) are located on both sides of the motor (31) and are arranged parallel to the output shaft of the motor (31); Two ratchet sprocket drive units (33) are provided, each ratchet sprocket drive unit (33) connecting the output shaft of the motor (31) to each drive shaft (32). Each drive shaft (32) passes through each ratchet sprocket drive unit (33). When the motor (31) rotates clockwise, it drives one drive shaft (32) to rotate; when the motor (31) rotates counterclockwise, it drives the other drive shaft (32) to rotate. Each ratchet sprocket drive unit (33) includes: A drive sprocket (331) is sleeved on the output shaft of a motor (31) and coaxially connected to the output shaft of the motor (31); A chain (332) meshes with the drive sprocket (331); A ratchet mechanism (333) is sleeved on the transmission shaft (32) and coaxially arranged with the transmission shaft (32). The ratchet mechanism (333) meshes with the chain (332) to form a transmission connection between the drive sprocket (331) and the ratchet mechanism (333) through the chain (332). Two cam drive units (34), each cam drive unit (34) includes: A transmission box (341) is fixed to the vehicle body (1), and a transmission shaft (32) passes through the transmission box (341) and is rotatably connected to the transmission box (341). A first bevel gear set (342) and a second bevel gear set (343) are installed in the transmission box (341). The first bevel gear set (342) is connected to one of the transmission shafts (32), and the second bevel gear set (343) is connected to the other transmission shaft (32). The first cam (344) is rotatably connected to the outside of the transmission box (341) and is connected to the first bevel gear set (342) in a transmission connection. The second cam (345) is rotatably connected to the inner side of the transmission box (341) and is connected to the second bevel gear set (343). The second cam (345) is located below the lifting plate (2) and abuts against the lifting plate (2). When the second cam (345) rotates, it drives the lifting plate (2) to lift. The main track wheel assembly (4) is connected to the first cam (344), and the first cam (344) rotates to drive the main track wheel assembly (4) to rise and fall to change direction.

2. The four-way shuttle vehicle according to claim 1, characterized in that, The ratchet mechanism (333) includes: Wheel cover (3331), The inner ring (3332) is rotatably connected to the wheel cover (3331), and the inner ring (3332) is sleeved on the drive shaft (32) and fixed to the drive shaft (32); Driven sprocket (3333), the driven sprocket (3333) is sleeved on the wheel cover (3331) and is rotatably connected to the wheel cover (3331); Multiple pins (3334) are distributed at equal angles around the center of the driven sprocket (3333) on the inner circumference side of the driven sprocket (3333), and the pins (3334) are rotatably connected to the driven sprocket (3333). Multiple pawls (3335), each pawl (3335) is fixedly connected to the pin (3334), and a toothed groove adapted to the shape of the pawl (3335) is provided on the outer circumference of the inner ring (3332); When the driven sprocket (3333) rotates, it drives the pawl (3335) to slide along the inner ring (3332) of the wheel, or drives the pawl (3335) to mesh with the inner ring (3332) of the wheel to drive the transmission shaft (32) to rotate.

3. The four-way shuttle vehicle according to claim 2, characterized in that, Both the driving sprocket (331) and the driven sprocket (3333) are double-row sprockets.

4. The four-way shuttle vehicle according to claim 1, characterized in that, The cross-sectional shape of the first cam (344) and the second cam (345) is an eccentric ring.

5. The four-way shuttle vehicle according to claim 1, characterized in that, The shuttle also includes: The first contact plate (5) is fixedly connected to the first cam (344) and contacts the outer side of the transmission box (341), wherein the main wheel assembly (4) is mounted on the first contact plate (5).

6. The four-way shuttle vehicle according to claim 5, characterized in that, The first contact plate (5) is also provided with a guide sleeve (51), which is vertically installed and slidably sleeved on the vehicle body (1) to limit the movement path of the first contact plate (5).

7. The four-way shuttle vehicle according to claim 1, characterized in that, The vehicle body (1) also includes: Base plate (11); Two first side plates (12) are arranged opposite each other and extend vertically on the base plate (11). The main wheel assembly (4) is slidably connected to the opposite end faces of the two first side plates (12). Two second side plates (13) are arranged opposite each other and extend vertically on the base plate (11). The two second side plates (13), the two first side plates (12) and the base plate (11) form an upward-opening mounting cavity. The power transmission assembly (3) is installed in the mounting cavity.

8. The four-way shuttle vehicle according to claim 7, characterized in that, The shuttle also includes: The wheel assembly (6) is rotatably connected to the opposite end faces of two second side plates (13).

9. The four-way shuttle vehicle according to claim 1, characterized in that, The lifting support plate (2) includes: The second contact plate (21) abuts against the second cam (345); A guide shaft (22) is slidably sleeved on the vehicle body (1) to limit the movement path of the second contact plate (21).

10. A four-way shuttle system, characterized in that, Includes the four-way shuttle as described in any one of claims 1-9 and the track for the four-way shuttle to travel, wherein the track includes a main track and a secondary track perpendicular to the main track.

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