Bidirectional driving mechanism and logistics shuttle vehicle

Abstract

The application relates to a bidirectional driving mechanism and a logistics shuttle. The bidirectional driving mechanism comprises a base frame, a walking wheel assembly comprising a first walking wheel and a second walking wheel, the first walking wheel and the second walking wheel are rotatably installed on the base frame, the axis of the first walking wheel intersects with the axis of the second walking wheel, a driving assembly comprising a power source arranged on the base frame, two output shafts connected to the power source, the power source is configured to drive the two output shafts to rotate independently, and two transmission assemblies, the two output shafts are respectively connected to the first walking wheel and the second walking wheel through the two transmission assemblies. The bidirectional driving mechanism can make the overall structure of the logistics shuttle more compact, save the corresponding structure cost, and make the logistics shuttle have good compatibility and adaptability.

Description

Technical Field

[0001] This application relates to the field of warehousing and logistics equipment technology, and in particular to a bidirectional drive mechanism and a logistics shuttle. Background Technology

[0002] With the growing market demand for intelligent logistics equipment, highly automated four-way shuttle vehicles are being widely used.

[0003] In related technologies, the driving mode of logistics shuttles is mainly bidirectional drive, enabling the logistics shuttles to shuttle in four directions. Its core structure consists of multiple motors and two sets of reducers, supplemented by related supporting parts. It not only occupies the internal space of the logistics shuttle, but also increases the overall manufacturing cost of the logistics shuttle. Utility Model Content

[0004] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application provides a bidirectional drive mechanism and a logistics shuttle, which enables the overall structure of the logistics shuttle to be more compact, while saving corresponding structural costs, and giving the logistics shuttle good compatibility and adaptability.

[0005] In a first aspect, this application provides a bidirectional drive mechanism, comprising:

[0006] Base frame;

[0007] The walking wheel assembly includes a first walking wheel and a second walking wheel, both of which are rotatably mounted on the base frame, and the axis of the first walking wheel intersects with the axis of the second walking wheel;

[0008] The drive assembly includes a power source disposed on the base frame and two output shafts connected to the power source, the power source being configured to drive the two output shafts to rotate independently;

[0009] Two transmission components are provided, and the two output shafts are respectively connected to the first traveling wheel and the second traveling wheel through the two transmission components.

[0010] The bidirectional drive mechanism according to the first aspect of this application has at least the following beneficial effects:

[0011] The bidirectional drive mechanism of this application, through the coordinated arrangement of a walking wheel assembly, a drive assembly, and two transmission assemblies, allows a single power source on the drive assembly to drive two output shafts to rotate independently. One output shaft transmits torque to the first walking wheel through a corresponding transmission assembly, and the other output shaft transmits torque to the second walking wheel through a corresponding transmission assembly. This enables the logistics shuttle equipped with this bidirectional drive mechanism to have four-way movement capabilities while effectively reducing the space occupied by the drive mechanism inside the logistics shuttle, improving the utilization rate of the internal space of the logistics shuttle, making the overall structure of the logistics shuttle more compact, and saving corresponding structural costs. This also gives the logistics shuttle equipped with this bidirectional drive mechanism good compatibility and adaptability.

[0012] In some embodiments, the transmission assembly includes a first synchronous pulley, a second synchronous pulley, and a first synchronous belt. The first synchronous pulley is disposed on the output shaft, the second synchronous pulley is connected to the first or second traveling wheel, and the first synchronous belt is wound around the first and second synchronous pulleys.

[0013] In some embodiments, the walking wheel assembly further includes a first wheel axle and a second wheel axle, wherein the first walking wheel is drivenly connected to the first wheel axle and the second walking wheel is drivenly connected to the second wheel axle; the second synchronizing wheel is disposed on the first wheel axle or the second wheel axle.

[0014] In some embodiments, the first axle and the second axle are perpendicular to each other.

[0015] In some embodiments, the bidirectional drive mechanism further includes two tension adjustment components disposed on the base frame, and the tension adjustment components are configured to adjust the tension of the corresponding first synchronous belt.

[0016] In some embodiments, the tension adjustment assembly includes a support base, a sliding block, and an adjustment roller. The first timing belt is partially wound around the adjustment roller. The sliding block is connected to the adjustment roller and slidably connected to the support base, so as to drive the adjustment roller to move in the direction of tensioning or loosening the first timing belt.

[0017] In some embodiments, the tension adjustment assembly further includes a threaded component, a limiting groove is formed on the support base, the sliding block is slidably mounted in the limiting groove, and the threaded component is threaded through the support base and threadedly connected to the sliding block.

[0018] In some embodiments, the first traveling wheel rolls when it is at a first height relative to the base frame, and the second traveling wheel rolls when it is at a second height relative to the base frame, wherein the first height and the second height are different.

[0019] In some embodiments, the transmission assembly connected to the second traveling wheel further includes a third synchronous pulley, a fourth synchronous pulley, and a second synchronous belt; the second synchronous belt is wound around the third synchronous pulley and the fourth synchronous pulley, and the third synchronous pulley is fixed to the second wheel axle; the base frame includes a main frame and a lifting frame, the first traveling wheel is rotatably mounted on the main frame, the second traveling wheel is rotatably mounted on the lifting frame, the second traveling wheel is coaxially connected to the fourth synchronous pulley, the fourth synchronous pulley is suspended in the gap space between the main frame and the lifting frame, and the lifting frame is capable of moving up and down relative to the main frame in the height direction.

[0020] Secondly, this application provides a logistics shuttle vehicle, which includes the bidirectional drive mechanism described above.

[0021] 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

[0022] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. 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. In the drawings:

[0023] Figure 1 This is a schematic diagram of the bidirectional drive mechanism according to an embodiment of this application.

[0024] Figure 2 for Figure 1 A magnified view of point A in the image.

[0025] Figure 3 This is a schematic diagram of the cooperation structure between the tension adjustment component and the first synchronous belt in an embodiment of this application.

[0026] Figure 4 This is a partial structural schematic diagram of the bidirectional drive mechanism according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: Base frame 100; Main frame 110; Vertical slide rail 111; Lifting frame 120; Slider 121; Drive assembly 200; Power source 210; Output shaft 220; Transmission assembly 300; First synchronous pulley 310; Second synchronous pulley 320; First synchronous belt 330; Third synchronous pulley 340; Fourth synchronous pulley 350; Second synchronous belt 360; Traveling wheel assembly 400; First traveling wheel 410; Second traveling wheel 420; First wheel axle 430; Second wheel axle 440; Tension adjustment assembly 500; Support seat 510; Limiting slide groove 511; Sliding block 520; Adjusting roller 530; Threaded part 540. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0030] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0034] With the growing market demand for intelligent logistics equipment, highly automated four-way shuttle vehicles are being widely used.

[0035] In related technologies, the driving mode of logistics shuttles is mainly bidirectional drive, enabling the logistics shuttles to shuttle in four directions. Its core structure consists of multiple motors and two sets of reducers, supplemented by related supporting parts. It not only occupies the internal space of the logistics shuttle, but also increases the overall manufacturing cost of the logistics shuttle.

[0036] Based on this, one or more embodiments of this application provide a bidirectional drive mechanism. Through the cooperative arrangement of a walking wheel assembly, a drive assembly, and two transmission assemblies, a single power source on the drive assembly drives two output shafts to rotate independently. One output shaft transmits torque to the first walking wheel through a corresponding transmission assembly, and the other output shaft transmits torque to the second walking wheel through a corresponding transmission assembly. This enables the logistics shuttle equipped with this bidirectional drive mechanism to have four-way movement capabilities while effectively reducing the space occupied by the drive mechanism inside the logistics shuttle, improving the utilization rate of the internal space of the logistics shuttle, making the overall structure of the logistics shuttle more compact, and saving corresponding structural costs. This also gives the logistics shuttle equipped with this bidirectional drive mechanism good compatibility and adaptability.

[0037] See Figure 1 and Figure 2 The embodiments of this application provide a bidirectional drive mechanism, which includes a base frame 100, a walking wheel assembly 400, a drive assembly 200, and two transmission assemblies 300.

[0038] The walking wheel assembly 400 includes a first walking wheel 410 and a second walking wheel 420, both of which are rotatably mounted on the base frame 100, and the axis of the first walking wheel 410 and the axis of the second walking wheel 420 intersect each other.

[0039] The drive assembly 200 includes a power source 210 disposed on the base frame 100 and two output shafts 220 connected to the power source 210. The power source 210 is configured to drive the two output shafts 220 to rotate independently. The two output shafts 220 are respectively connected to the first traveling wheel 410 and the second traveling wheel 420 through two transmission assemblies 300.

[0040] It should be noted that the bidirectional drive mechanism in this application embodiment can be configured as an AGV (Automated Guided Vehicle) transport vehicle, a logistics shuttle vehicle, etc.

[0041] In this application, the base frame 100 refers to the basic skeleton structure used to support and fix functional components such as the walking wheel assembly 400, the drive assembly 200, and the transmission assembly 300.

[0042] In this application, the traveling wheel assembly 400 refers to a motion execution component that converts driving power into controllable movement, and it also performs functions such as support, guidance, and braking. In the traveling wheel assembly 400, there can be multiple first traveling wheels 410, which are rotatably mounted on the left and right sides of the base frame 100. The axis of the first traveling wheel 410, i.e., the central axis of the first traveling wheel 410, extends in the left-right direction of the base frame 100. In this case, the direction of movement of the first traveling wheel 410 is the front-back direction of the base frame 100. Similarly, there can be multiple second traveling wheels 420, which are rotatably mounted on the front and rear sides of the base frame 100. The axis of the second traveling wheel 420, i.e., the central axis of the second traveling wheel 420, extends in the front-back direction of the base frame 100. In this case, the direction of movement of the second traveling wheel 420 is the left-right direction of the base frame 100.

[0043] The intersection of the axis of the first traveling wheel 410 and the axis of the second traveling wheel 420 means that the central axis of the first traveling wheel 410 intersects with the central axis of the second traveling wheel 420. In other words, the direction of movement of the first traveling wheel 410 intersects with the direction of movement of the second traveling wheel 420. The forward and reverse rotation of the first traveling wheel 410 can drive the entire bidirectional drive mechanism to move back and forth in one direction. Similarly, the forward and reverse rotation of the second traveling wheel 420 can drive the entire bidirectional drive mechanism to move back and forth in another direction. This gives the logistics shuttle equipped with the bidirectional drive mechanism four degrees of freedom of movement and four-way movement function.

[0044] For example, in some embodiments, the axis of the first traveling wheel 410 and the axis of the second traveling wheel 420 are perpendicular to each other. The moving direction of the first traveling wheel 410 is the front-back direction of the base frame 100, and the moving direction of the second traveling wheel 420 is the left-right direction. In this way, the logistics shuttle vehicle with the bidirectional drive mechanism can move in the front-back and left-right directions to meet the needs of logistics operations.

[0045] In this application, for the drive assembly 200, the power source 210 can be a rotary drive component. The power source 210 has two output ends in different directions, and two output shafts 220 are respectively connected to the two output ends of the power source 210, thereby being driven to rotate by the power source 210. For example, the power source 210 is a dual-axis stepper motor, a dual-axis servo motor, etc. The configuration of the power source 210 to drive the two output shafts 220 to rotate independently can be understood as the power source 210 can alternately drive the rotation of one of the two output shafts 220, or selectively drive the rotation of one of the two output shafts 220, so that the rotational actions of the two output shafts 220 are independent of each other and do not interfere with each other.

[0046] In this application, the transmission assembly 300 refers to a power transmission structure located between two output shafts 220 and the corresponding first traveling wheel 410 or second traveling wheel 420, used to transmit the torque of the power source 210 or the output shaft 220. One output shaft 220 is connected to the first traveling wheel 410 through a transmission assembly 300 to transmit the torque of the output shaft 220 to the first traveling wheel 410, thereby driving the first traveling wheel 410 to roll. The other output shaft 220 is connected to the second traveling wheel 420 through another transmission assembly 300 to transmit the torque of the output shaft 220 to the second traveling wheel 420, thereby driving the second traveling wheel 420 to roll.

[0047] The transmission assembly 300 may include, but is not limited to, gear transmission structure, first synchronous belt transmission structure, sprocket and chain transmission structure, etc.

[0048] The bidirectional drive mechanism of this application embodiment, through the cooperative arrangement of the walking wheel assembly 400, the drive assembly 200, and two transmission assemblies 300, allows a single power source 210 on the drive assembly 200 to drive two output shafts 220 to rotate independently. One output shaft 220 transmits torque to the first walking wheel 410 through the corresponding transmission assembly 300, and the other output shaft 220 transmits torque to the second walking wheel 420 through the corresponding transmission assembly 300. This enables the logistics shuttle equipped with this bidirectional drive mechanism to have four-way movement function while effectively reducing the space occupied by the drive mechanism in the internal space of the logistics shuttle, improving the internal space utilization rate of the logistics shuttle, making the overall structure of the logistics shuttle more compact, and saving corresponding structural costs. This also gives the logistics shuttle equipped with this bidirectional drive mechanism good compatibility and adaptability.

[0049] In some embodiments of this application, see Figure 1 The transmission assembly 300 includes a first synchronous pulley 310, a second synchronous pulley 320, and a first synchronous belt 330. The first synchronous pulley 310 is located on the output shaft 220. The second synchronous pulley 320 is connected to the first traveling wheel 410 or the second traveling wheel 420 in a transmission connection. The first synchronous belt 330 is wound around the first synchronous pulley 310 and the second synchronous pulley 320.

[0050] Specifically, the traveling wheel assembly 400 also includes a first wheel axle 430 and a second wheel axle 440. The first traveling wheel 410 is drivenly connected to the first wheel axle 430, and the second traveling wheel 420 is drivenly connected to the second wheel axle 440. The second synchronous pulley 320 is disposed on the first wheel axle 430 or the second wheel axle 440. The first wheel axle 430 and the second wheel axle 440 are perpendicular to each other.

[0051] See Figure 1The power source 210 has two mutually perpendicular output ends. A reducer, a transfer mechanism, etc. can be installed on the power source 210 to distribute the rotational torque of the single rotor of the power source 210 to the two output ends. Of course, the power source 210 can also have two rotors built in, which can output torque independently to the two output ends respectively. The two output shafts 220 are perpendicular to each other and are connected to the two output ends respectively.

[0052] The axis of the first axle 430 is oriented in the left-right direction of the base frame 100, and both ends of the first axle 430 are mounted on the left and right side walls of the base frame 100 via bearings. There are two first traveling wheels 410, each connected to one end of the first axle 430 via bearings. The second synchronous pulley 320 of one of the transmission components 300 is coaxially connected to the first axle 430. Thus, the power source 210 transmits rotational torque to the first axle 430 through the transmission component 300, which consists of the first synchronous pulley 310, the second synchronous pulley 320, and the first synchronous belt 330, causing the two first traveling wheels 410 to rotate synchronously from the same first axle 430, thus driving the logistics shuttle vehicle to move in the forward-backward direction.

[0053] Similarly, the axis of the second wheel axle 440 is in the front-rear direction of the base frame 100, and both ends of the second wheel axle 440 are mounted on the front and rear side walls of the base frame 100 via bearings. The first wheel axle 430 and the second wheel axle 440 are independent of each other and do not contact each other, thus avoiding structural interference. There are two second traveling wheels 420, which are respectively connected to the opposite ends of the second wheel axle 440 via bearings. The second synchronous pulley 320 of another transmission component 300 is coaxially connected to the second wheel axle 440. In this way, the power source 210 transmits the rotational torque to the second wheel axle 440 through the transmission component 300, which consists of the first synchronous pulley 310, the second synchronous pulley 320, and the first synchronous belt 330, so that the two second traveling wheels 420 are driven to rotate synchronously by the same second wheel axle 440, driving the logistics shuttle to move in the left-right direction.

[0054] In the above-described structure, the output torque of the power source 210 in both directions is transmitted independently through two sets of transmission components 300 formed by the first synchronous pulley 310, the second synchronous pulley 320, and the first synchronous belt 330. There is no need to set up a complex gearbox or other housing structure. The wheel system structure that cooperates with the first synchronous belt 330 can be flexibly arranged according to the internal space of the base frame 100 without occupying the chassis space of the logistics shuttle. Moreover, it is not necessary to force the output end of the power source 210 to be coaxially arranged with the first traveling wheel 410 or the second wheel axle 440. The two output ends or two output shafts 220 of the power source 210 can be staggered with the first wheel axle 430 and the second wheel axle 440 in the internal space of the base frame 100 or the logistics shuttle, simplifying the internal structure of the logistics shuttle and making the overall structure of the logistics shuttle more compact.

[0055] Compared to the transmission structure of a gearbox or the structure of a servo motor independently driving the corresponding walking wheels, the transmission assembly 300 formed by the first synchronous pulley 310, the second synchronous pulley 320 and the first synchronous belt 330 can reduce the overall structural cost of the logistics shuttle while meeting the transmission performance requirements, and meet the operational needs of the logistics shuttle in the warehousing and logistics system for four-way movement and continuous operation.

[0056] It should be noted that in the transmission assembly 300, the first synchronous belt 330 is prone to loosening due to stretching during long-term operation, which causes a gap between the teeth of the first synchronous pulley 310 and the second synchronous pulley 320 and the belt teeth of the first synchronous belt 330, affecting the stability of the torque rotation of the transmission assembly 300.

[0057] Based on this, in some embodiments of this application, see [reference] Figure 1 and Figure 3 The bidirectional drive mechanism also includes two tension adjustment components 500, which are located on the base frame 100 and are configured to adjust the tension of the corresponding first synchronous belt 330.

[0058] By setting the tension adjustment component 500, the tension of the first synchronous belt 330 can be adjusted when the first synchronous belt 330 is loose or too tight, so that the first synchronous belt 330 can be kept in a better tension state and avoid transmission failure caused by the looseness or tightness of the first synchronous belt 330. At the same time, it can adapt to the compact layout of logistics shuttle and high frequency start-stop conditions.

[0059] Moreover, the two tension adjustment components 500 independently adjust the first synchronous belts 330 of the two transmission components 300, so that the first synchronous belts 330 of the two transmission components 300 will not have problems of synchronous tensioning and synchronous slack.

[0060] Further, see Figure 3 The tension adjustment assembly 500 includes a support base 510, a sliding block 520, and an adjustment roller 530. A portion of the first synchronous belt 330 is wound around the adjustment roller 530. The sliding block 520 is connected to the adjustment roller 530 and is slidably connected to the support base 510 so as to drive the adjustment roller 530 to move in the direction of tensioning or loosening the first synchronous belt 330.

[0061] Specifically, the tension adjustment assembly 500 also includes a threaded component 540, a limiting groove 511 formed on the support base 510, a sliding block 520 slidably mounted in the limiting groove 511, and the threaded component 540 threadedly passes through the support base 510 and is threadedly connected to the sliding block 520.

[0062] The support base 510 can be fixed to the base frame 100 by a detachable structure such as screws or clips. A threaded hole (not shown in the figure) is formed on the support base 510, communicating with the limiting groove 511. A stepped limiting hole (not shown in the figure) is formed on the sliding block 520. A threaded component 540 is threaded into this threaded hole and forms a threaded connection with the stepped limiting hole. The stepped limiting hole serves to prevent the threaded component 540 from detaching from the sliding block 520.

[0063] When it is necessary to adjust the tension of the first synchronous belt 330, the bidirectional drive mechanism can be stopped as a whole. By manually or using a tool to turn the threaded part 540, when the threaded part 540 rotates relative to the threaded hole, the sliding block 520 moves along the limiting slide groove 511 under the sliding connection constraint of the limiting slide groove 511 and the thread constraint of the threaded part 540, thereby driving the adjusting roller 530 on it to move towards or away from the first synchronous belt 330, thereby adjusting the tension of the first synchronous belt 330.

[0064] The above-described structure, through the coordinated arrangement of threaded component 540, support base 510, sliding block 520, and adjusting roller 530, allows the limiting groove 511 on the support base 510 to slide in connection with the sliding block 520. This ensures that the sliding block 520 has only one degree of freedom of movement, moving along the limiting groove 511. By turning the threaded component 540, the rotational motion of the threaded component 540 is converted into the movement motion of the sliding block 520, thereby driving the adjusting roller 530 to move closer to or further away from the first synchronous belt 330, adjusting the tension of the first synchronous belt 330. The adjustment method is simple and convenient, eliminating the need for an additional drive structure, thus reducing the overall structural cost of the bidirectional drive mechanism. At the same time, it allows for convenient adjustment of the tension of the first synchronous belt 330, maintaining it at an optimal tension level and preventing transmission failures caused by the first synchronous belt 330 being too loose or too tight. This improves the stability and reliability of the logistics shuttle equipped with this bidirectional drive mechanism.

[0065] In some embodiments of this application, see Figure 1 and Figure 4 The first traveling wheel 410 rolls at a first height relative to the base frame 100, and the second traveling wheel 420 rolls at a second height relative to the base frame 100. The first height and the second height are not the same.

[0066] It should be noted that when the first traveling wheel 410 is at a first height relative to the base frame 100, the first traveling wheel 410 is in contact with the traveling track. Similarly, when the second traveling wheel 420 is at a second height relative to the base frame 100, the second traveling wheel 420 is in contact with the traveling track.

[0067] In other words, when the first traveling wheel 410 rolls along the traveling track, the second traveling wheel 420 is suspended relative to the traveling track, and when the second traveling wheel 420 rolls along the traveling track, the first traveling wheel 410 is suspended relative to the traveling track.

[0068] With this configuration, when the first traveling wheel 410 drives the logistics shuttle to move in the front-to-back direction, the second traveling wheel 420 will not interfere with the movement of the first traveling wheel 410. When the second traveling wheel 420 drives the logistics shuttle to move in the left-to-right direction, the first traveling wheel 410 will not interfere with the movement of the second traveling wheel 420, ensuring that the logistics shuttle can reliably move in the corresponding direction.

[0069] Further, see Figure 2 and Figure 4 The transmission assembly 300, which is connected to the second traveling wheel 420, also includes a third synchronous wheel 340, a fourth synchronous wheel 350, and a second synchronous belt 360. The second synchronous belt 360 is wound around the third synchronous wheel 340 and the fourth synchronous wheel 350, and the third synchronous wheel 340 is fixed to the second wheel axle 440. The base frame 100 includes a main frame 110 and a lifting frame 120. The first traveling wheel 410 is rotatably mounted on the main frame 110, and the second traveling wheel 420 is rotatably mounted on the lifting frame 120. The second traveling wheel 420 is coaxially connected to the fourth synchronous wheel 350. The fourth synchronous wheel 350 is suspended in the gap space between the main frame 110 and the lifting frame 120. The lifting frame 120 can move up and down relative to the main frame 110 in the height direction.

[0070] Specifically, the main frame 110 is provided with a vertical slide rail 111 extending along the height direction, the lifting frame 120 is provided with a slider 121 slidably installed on the vertical slide rail 111, and the main frame 110 is provided with a lifting drive (not shown in the figure). The output end of the lifting drive is connected to the lifting frame 120 to drive the lifting frame 120 to slide along the vertical slide rail 111. The lifting drive can be a combination structure of a motor and a cam to reduce the space occupied by the lifting drive on the main frame 110. Of course, the lifting drive can also be a linear cylinder.

[0071] It should be understood that when the logistics shuttle needs to operate in a forward-backward direction, the bottom of the second traveling wheel 420 is higher than that of the first traveling wheel 410, and the height difference between the two can be adapted to the layout of the travel track. When the logistics shuttle needs to switch to operating in a left-right direction, the lifting frame 120 drives the second traveling wheel 420 to descend in the vertical direction. During this process, the second synchronous belt 360 swings around the axis of the third synchronous wheel 340 under the constraint of the fixed third synchronous wheel 340. After the lifting frame 120 drives the second traveling wheel 420 to contact the travel track, the lifting frame 120 will continue to be driven by the lifting force. During this process, the main frame 110 will be driven by the reaction force of the travel track, causing the first traveling wheel 410 on it to rise relative to the travel track until the first traveling wheel 410 is suspended relative to the travel track. In this way, the logistics shuttle can stably switch its operating direction.

[0072] In order to maintain a suitable tension in the second synchronous belt 360 during the switching of the logistics shuttle's direction of movement, the second synchronous belt 360 can be set as a flexible transmission belt with high structural strength and deformation capacity. It can adapt to the changes in the posture and position of the second synchronous belt 360 through its own elastic deformation, so that the second synchronous belt 360 can maintain a good tension before and after the logistics shuttle's direction of movement is completed, thus ensuring the transmission stability and reliability of the second synchronous belt 360.

[0073] In addition, this application also provides a logistics shuttle vehicle, which includes the bidirectional drive mechanism of any of the above embodiments.

[0074] Logistics shuttle vehicles operate along the crisscrossing tracks of the logistics warehouse, enabling the logistics warehouse to achieve a better inventory turnover rate.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A bidirectional drive mechanism, characterized in that, include: Base frame; The walking wheel assembly includes a first walking wheel and a second walking wheel, both of which are rotatably mounted on the base frame, and the axis of the first walking wheel intersects with the axis of the second walking wheel; The drive assembly includes a power source disposed on the base frame and two output shafts connected to the power source, the power source being configured to drive the two output shafts to rotate independently; Two transmission components are provided, and the two output shafts are respectively connected to the first traveling wheel and the second traveling wheel through the two transmission components.

2. The bidirectional drive mechanism according to claim 1, characterized in that, The transmission assembly includes a first synchronous pulley, a second synchronous pulley, and a first synchronous belt. The first synchronous pulley is located on the output shaft, the second synchronous pulley is connected to the first or second traveling wheel, and the first synchronous belt is wound around the first and second synchronous pulleys.

3. The bidirectional drive mechanism according to claim 2, characterized in that, The walking wheel assembly further includes a first wheel axle and a second wheel axle, the first walking wheel being drivenly connected to the first wheel axle, and the second walking wheel being drivenly connected to the second wheel axle; the second synchronizing wheel is disposed on the first wheel axle or the second wheel axle.

4. The bidirectional drive mechanism according to claim 3, characterized in that, The first axle and the second axle are perpendicular to each other.

5. The bidirectional drive mechanism according to claim 2, characterized in that, The bidirectional drive mechanism further includes two tension adjustment components, which are disposed on the base frame and configured to adjust the tension of the corresponding first synchronous belt.

6. The bidirectional drive mechanism according to claim 5, characterized in that, The tension adjustment assembly includes a support base, a sliding block, and an adjustment roller. The first synchronous belt is partially wound around the adjustment roller. The sliding block is connected to the adjustment roller and is slidably connected to the support base so as to drive the adjustment roller to move in the direction of tensioning or loosening the first synchronous belt.

7. The bidirectional drive mechanism according to claim 6, characterized in that, The tension adjustment assembly also includes a threaded component. A limiting groove is formed on the support base. The sliding block is slidably installed in the limiting groove. The threaded component passes through the support base and is threadedly connected to the sliding block.

8. The bidirectional drive mechanism according to claim 3, characterized in that, The first traveling wheel rolls when it is at a first height relative to the base frame, and the second traveling wheel rolls when it is at a second height relative to the base frame. The first height and the second height are not the same.

9. The bidirectional drive mechanism according to claim 8, characterized in that, The transmission assembly connected to the second traveling wheel further includes a third synchronous pulley, a fourth synchronous pulley, and a second synchronous belt; the second synchronous belt is wound around the third synchronous pulley and the fourth synchronous pulley, and the third synchronous pulley is fixed to the second wheel axle; the base frame includes a main frame and a lifting frame, the first traveling wheel is rotatably mounted on the main frame, the second traveling wheel is rotatably mounted on the lifting frame, the second traveling wheel is coaxially connected to the fourth synchronous pulley, the fourth synchronous pulley is suspended in the gap space between the main frame and the lifting frame, and the lifting frame can move up and down relative to the main frame in the height direction.

10. A logistics shuttle vehicle, characterized in that, Includes the bidirectional drive mechanism as described in any one of claims 1 to 9.

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