Driving structure and electric trolley

Abstract

The utility model discloses a driving structure, the driving structure is used for driving a driving wheel to rotate, the driving structure is arranged in the driving wheel, the driving structure comprises a driving motor, a gear transmission part, a clutch part and a wheel carrier assembly, and the driving motor and the gear transmission part are both connected with the wheel carrier assembly; the driving motor is in transmission connection with one end of the gear transmission part and drives the gear transmission part to rotate, and the other end of the gear transmission part is in transmission connection with the driving wheel through the clutch part and drives the driving wheel to rotate; wherein the clutch piece comprises a clutch ring and a clutch column, the clutch ring is provided with a clutch face, the clutch face comprises a clutch plane and an arc-shaped transition face connected with the clutch plane, and the clutch column can be magnetically attracted to the clutch face. The driving wheel can serve as a physical barrier, external accidental touch is effectively blocked, the risk of damage to the driving motor, the gear transmission part, the clutch part, the wheel carrier assembly and other parts due to accidental touch is greatly reduced, the reliability and stability of the driving structure are improved, and the service life of the driving structure is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transportation devices, in particular to a driving structure and an electric trolley. BACKGROUND

[0002] The current electric trolley usually adopts a motor and a clutch structure for electric driving, and the driving structure is a key component for realizing power transmission and driving wheel rotation. The traditional driving structure design often has many deficiencies. In the related technology, many driving structures are fully or partially exposed outside the wheels, such as between the two rear wheels, and the driving structure is fully or partially exposed outside the wheels. Such design makes the driving structure easily damaged due to accidental touch by personnel or foreign objects, resulting in failure of key components such as driving motor, gear transmission, clutch and wheel carrier assembly, greatly reducing the reliability and stability of the driving structure and shortening its service life.

[0003] At the same time, the exposed driving structure needs to reserve additional installation space outside the equipment, which not only leads to an insufficiently compact and reasonable space layout of the overall equipment, but also increases the volume and occupied space of the equipment, which is not conducive to the miniaturization and integration development of the equipment. Moreover, dust, water vapor, debris and the like in the external environment can easily invade the driving structure, affecting its performance and making it difficult to work stably and normally under different environmental conditions. In addition, the noise generated by the exposed driving structure during operation cannot be effectively blocked, which brings poor user experience. Moreover, from the appearance, the exposed driving components damage the simplicity and aesthetics of the overall equipment, reducing the competitiveness of the product in the market. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide a driving structure and an electric trolley to solve the problems of damage risk and unattractive appearance caused by the exposure of the driving structure.

[0005] To achieve the above purpose, the technical scheme adopted by the present application is to provide a driving structure for driving a driving wheel to rotate, and the driving structure is placed in the driving wheel, the driving structure comprises a driving motor, a gear transmission, a clutch and a wheel carrier assembly, the driving motor and the gear transmission are connected with the wheel carrier assembly, the driving motor is in transmission connection with one end of the gear transmission and drives the gear transmission to rotate, the other end of the gear transmission is in transmission connection with the driving wheel through the clutch and drives the driving wheel to rotate, wherein the clutch comprises a clutch ring and a clutch column, the clutch ring is provided with a clutch surface, the clutch surface comprises a clutch flat surface and an arc transition surface connected with the clutch flat surface, and the clutch column can be magnetically adsorbed on the clutch surface.

[0006] As a preferred, the wheel frame assembly comprises a first wheel frame and a second wheel frame, the first wheel frame and the second wheel frame are fixedly connected, and the first wheel frame and the second wheel frame are oppositely arranged.

[0007] As another preferred, the clutch ring further comprises an arc surface, the arc surface is connected with the arc transition surface, and the arc surface and the arc transition surface are convex to each other.

[0008] Further preferably, the clutch ring is provided with four sets of clutch surfaces and four sets of arc surfaces, each set of the clutch surfaces comprises a clutch flat, and the clutch flat is connected with the arc transition surface at both ends.

[0009] Further preferably, the gear transmission member comprises a driving gear, the driving gear is connected with the driving wheel through a connecting member, and the clutch member is clamped between the driving gear and the connecting member.

[0010] Preferably, the clutch member further comprises a clutch block, the driving gear is fixedly provided with the clutch block on a side facing the connecting member, the clutch ring is sleeved on the clutch block, and the clutch ring is driven to rotate through the clutch block; a concave cavity is arranged on a side of the connecting member facing the driving gear, the concave cavity is used for embedding the clutch ring and the clutch block, a groove for accommodating the clutch column is arranged on a circumferential surface of the concave cavity; when the driving motor is not powered, the clutch column is attracted to the clutch surface by magnetic force, and the driving gear and the connecting member are not locked; when the driving motor is powered, the driving motor drives the driving gear to rotate, under the action of centrifugal force, the clutch column is separated from the clutch surface and clamped into the groove of the connecting member, the driving gear and the connecting member are locked, and the driving wheel is driven to rotate.

[0011] Preferably, a limiting ring is arranged between the clutch ring and the connecting member, a limiting flat is arranged on a side of the limiting ring facing the clutch ring, and the limiting flat is used for limiting the axial movement of the clutch column.

[0012] Further, a motor mounting position is arranged on the wheel frame assembly to assemble the driving motor, and a motor pressing ring is arranged on the motor mounting position to limit the axial movement of the driving motor.

[0013] Preferably, a elastic member is clamped between the motor pressing ring and the driving motor.

[0014] Further, the present application also provides an electric trolley, which comprises a folding frame, a guide wheel and a driving wheel connected to the folding frame, and a driving structure as described in any one of the above embodiments arranged in the driving wheel.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] The driving structure is arranged in the driving wheel, the driving wheel can serve as a physical barrier to effectively prevent accidental touching from the outside, greatly reducing the risk of damage to the driving motor, gear transmission member, clutch member and wheel frame assembly and other components caused by accidental touching, improving the reliability and stability of the driving structure, and prolonging the service life thereof.

[0017] In particular, the driving structure is fixedly arranged in the driving wheel through the wheel frame assembly, that is, the wheel frame assembly cooperates with the driving wheel to play a role of transitional support, the driving structure is arranged in the driving wheel, the wheel frame assembly can form a more close and stable connection relationship with the inner wall of the driving wheel, so that the driving motor, gear transmission member and other components can maintain a more stable position during operation, reducing vibration and displacement, thereby improving the reliability and stability of the entire driving structure and ensuring that the rotation of the driving wheel is more stable and smooth. The wheel frame assembly can provide precise positioning and support for the gear transmission member, ensuring the engagement accuracy between the gears and the accuracy of the transmission axis. When the driving structure is arranged in the driving wheel, the wheel frame assembly can reasonably plan and optimize the transmission path between the gear transmission member, the driving motor, the clutch member and the driving wheel in a limited space, reduce energy loss and power transmission error during transmission, improve transmission efficiency, and enable the power of the driving motor to be more effectively transmitted to the driving wheel, achieving more efficient driving. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 FIG. 1 is a structural schematic diagram of a driving structure;

[0019] Figure 2 FIG. 2 is a side structural schematic diagram of the driving structure;

[0020] Figure 3 FIG. 3 is a structural schematic diagram of a driving wheel with the driving structure assembled therein;

[0021] Figure 4 FIG. 4 is a structural schematic diagram of the driving structure connected with a right wheel cover;

[0022] Figure 5 FIG. 5 is an exploded view of the structure of the driving structure and the driving wheel;

[0023] Figure 6 FIG. 6 is a structural schematic diagram of the position of a clutch member in the driving structure;

[0024] Figure 7 FIG. 7 is another structural schematic diagram of the position of the clutch member in the driving structure;

[0025] Figure 8 FIG. 8 is a structural schematic diagram of a clutch ring and a clutch column;

[0026] Figure 9 FIG. 9 is an exploded view of the structure of the driving structure.

[0027] In the figure: 1, drive structure; 2, drive wheel; 3, left wheel cover; 4, right wheel cover; 5, connecting shaft; 10, drive motor; 20, gear transmission; 21, drive gear; 22, center shaft; 30, clutch; 31, clutch ring; 311, clutch surface; 3111, clutch flat surface; 3112, arc transition surface; 3113, arc surface; 32, clutch block; 33, clutch column; 40, wheel carrier assembly; 41, first wheel carrier; 42, second wheel carrier; 50, connecting piece; 51, concave cavity; 52, groove; 53, connecting groove; 60, limiting ring; 70, motor mounting groove; 71, motor mounting hole; 72, motor pressing ring; 73, elastic member. DETAILED DESCRIPTION

[0028] Hereinafter, the present application will be further described in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, each embodiment described below or each technical feature can be combined with any other embodiment or technical feature to form a new embodiment.

[0029] In the description of the present application, it should be noted that, for orientation words, such as terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0030] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0031] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] In a preferred embodiment, referring to Figures 1 to 9The application provides a driving structure 1 for driving a driving wheel 2 to rotate, and the driving structure 1 is arranged in the driving wheel 2, and the driving structure 1 comprises a driving motor 10, a gear transmission member 20, a clutch member 30 and a wheel carrier assembly 40, the driving motor 10 and the gear transmission member 20 are connected with the wheel carrier assembly 40, the driving motor 10 is in transmission connection with one end of the gear transmission member 20, and the other end of the gear transmission member 20 is in transmission connection with the driving wheel 2 through the clutch member 30; wherein the driving motor 10 drives the gear transmission member 20 to rotate, and then the gear transmission member 20 drives the driving wheel 2 to rotate through the clutch member 30.

[0033] In the related art, if the driving structure 1 is exposed to the outside, it is easy to be damaged due to accidental touch of personnel or foreign matters, and the driving structure 1 is arranged in the driving wheel 2 in the application, the driving wheel 2 can be used as a physical barrier to effectively block accidental touch from the outside, greatly reducing the risk of damage to the driving motor 10, the gear transmission member 20, the clutch member 30 and the wheel carrier assembly 40 and other components due to accidental touch, improving the reliability and stability of the driving structure 1, and prolonging the service life.

[0034] Specifically, the driving structure 1 is fixedly arranged in the driving wheel 2 through the wheel carrier assembly 40, that is, the wheel carrier assembly 40 cooperates with the driving wheel 2 to play a role of transition support, the driving structure 1 is arranged in the driving wheel 2, the wheel carrier assembly 40 can form a more close and stable connection relationship with the inner wall of the driving wheel 2, so that the driving motor 10, the gear transmission member 20 and other components can maintain a more stable position during operation, reducing vibration and displacement, thereby improving the reliability and stability of the entire driving structure 1, and ensuring that the rotation of the driving wheel 2 is more stable and smooth. The wheel carrier assembly 40 can provide precise positioning and support for the gear transmission member 20, ensure the meshing accuracy between gears and the accuracy of the transmission axis, when the driving structure 1 is arranged in the driving wheel 2, the wheel carrier assembly 40 can reasonably plan and optimize the transmission path between the gear transmission member 20, the driving motor 10, the clutch member 30 and the driving wheel 2 in a limited space, reduce energy loss and power transmission error in the transmission process, improve transmission efficiency, so that the power of the driving motor 10 can be more effectively transmitted to the driving wheel 2, and more efficient driving is realized.

[0035] The wheel carrier assembly 40 can also flexibly adjust the layout of the gear transmission member 20 according to the specific size and shape of the driving wheel 2, adapt to different transmission ratio requirements, and further optimize the transmission performance. At the same time, the wheel carrier assembly 40 integrates various components such as the gear transmission member 20 and the driving motor 10, so that the driving structure 1 constitutes a whole, and the driving wheel 2 is convenient to disassemble, replace and maintain.

[0036] Meanwhile, the driving structure 1 is integrated inside the driving wheel 2, without the need for additional installation space outside, which helps to make the overall device more compact and reasonable in space layout. The driving wheel 2 can also provide a certain degree of protection for the internal driving structure 1, reducing the intrusion of dust, water vapor, debris, and the like, reducing the impact of these factors on the performance of the driving structure 1, ensuring that it can work normally under different environmental conditions, and the driving wheel 2 has a certain barrier and buffering effect on the running noise of the internal driving structure 1, which can effectively reduce the noise generated during device operation, create a quieter use environment for users, and improve user experience.

[0037] From the appearance, the built-in driving structure 1 makes the overall device more concise and smooth in appearance, without exposed driving components, which not only improves the aesthetic of the product, but also has more market competitiveness in some products with high requirements for appearance design.

[0038] As a preferred, referring to Figure 5 and Figure 9 , the wheel frame assembly 40 includes a first wheel frame 41 and a second wheel frame 42, the first wheel frame 41 and the second wheel frame 42 are fixedly connected, and the first wheel frame 41 and the second wheel frame 42 are oppositely spaced, in some embodiments, the two wheel frames can be set as symmetrical circles or other suitable shapes, or can be set as asymmetric irregular shapes according to specific conditions, to reduce the cost to a certain extent.

[0039] Among them, referring to Figures 3 to 5 , the driving wheel 2 suitable for the driving structure 1 in the present application file is a wheel body composed of a left wheel cover 3 and a right wheel cover 4, the driving wheel 2 composed of the left wheel cover 3 and the right wheel cover 4 is provided with an assembly space for placing the driving structure 1, the first wheel frame 41 and the second wheel frame 42 are oppositely spaced, which can form two-point or multi-point support inside the driving wheel 2, so that the weight of the driving motor 10, the gear transmission member 20 and other components and various forces generated during driving can be more evenly transmitted to the driving wheel 2 through the wheel frame assembly 40, avoiding excessive stress on a single point, thereby enhancing the stability and carrying capacity of the entire driving structure 1, and ensuring that the driving wheel 2 can operate normally under different loads.

[0040] The two wheel frames are relatively spaced and fixedly connected, which can provide a stable mounting base for each component in the driving structure 1, ensure that the driving motor 10, gear transmission member 20 and the like maintain accurate relative positions during operation, help maintain good meshing state and transmission accuracy between gears, reduce transmission errors and failures caused by component displacement, and ensure the stability and reliability of the rotation of the driving wheel 2. At the same time, the relative spacing of the two wheel frames can form a certain space between them, which is convenient for reasonable layout of other components in the driving structure 1. Further, part of the driving motor 10, the gear transmission member 20 and the clutch member 30 are placed in the space between the two wheel frames, which fully utilizes the limited space inside the driving wheel 2, makes the overall layout of the driving structure 1 more compact and reasonable, improves the space utilization, and helps to realize the miniaturization and lightweight design of the equipment.

[0041] Further, the space between the first wheel frame 41 and the second wheel frame 42 can form an air circulation channel, which is conducive to the circulation of air inside the driving wheel 2. When the driving structure 1 is working, the motor and gears and the like will generate heat, and through the channel between the two wheel frames, air can flow better and take away the heat, improving the heat dissipation effect.

[0042] As another preferred, referring to Figures 5 to 9 , the gear transmission member 20 includes transmission gears of each stage and a driving gear 21 at the output end, the driving gear 21 is connected with the driving wheel 2 through a connecting member 50, and the clutch member 30 is clamped between the driving gear 21 and the connecting member 50. The presence of the clutch member 30 makes the power transmission between the driving gear 21 and the connecting member 50 can be flexibly controlled according to actual needs. When the equipment needs to be electrically driven, the clutch member 30 is in the combined state, the driving motor 10 drives the driving gear 21 to rotate through the transmission gears of each stage, and the power of the driving gear 21 is transmitted to the connecting member 50 through the clutch member 30, thereby driving the driving wheel 2 to rotate. When the equipment is powered off, the clutch member 30 can be separated, cutting off the power transmission path between the driving gear 21 and the connecting member 50, so that the driving motor 10 no longer drives the driving wheel 2 to rotate. At this time, the user can drive the driving wheel 2 to rotate by manpower.

[0043] Further preferably, referring to Figures 6 to 8The clutch 30 comprises a clutch ring 31 and a clutch block 32, the clutch block 32 is fixed on the side of the driving gear 21 facing the connecting piece 50, the clutch ring 31 is sleeved on the clutch block 32, and the clutch ring 31 is driven to rotate by the clutch block 32; the clutch 30 further comprises a clutch column 33, the clutch ring 31 is provided with a clutch surface 311 and an arc surface 3113, and correspondingly, the connecting piece 50 is provided with a concave cavity 51 on the side facing the driving gear 21, the concave cavity 51 is used for embedding the clutch ring 31 and the clutch block 32, and a groove 52 for accommodating the clutch column 33 is arranged on the circumferential surface of the concave cavity 51. Further preferably, the diameter of the arc surface 3113 is the same as the diameter of the concave cavity 51. When the driving motor 10 is not powered, the clutch column 33 is adsorbed to the clutch surface 311 by magnetic force, and the driving gear 21 is not locked with the connecting piece 50; when the driving motor 10 is powered, the driving motor 10 drives the driving gear 21 to rotate, and under the action of centrifugal force, the clutch column 33 is separated from the clutch surface 311 and clamped into the groove 52 of the connecting piece 50, so that the driving gear 21 is locked with the connecting piece 50, and the driving wheel 2 is driven to rotate.

[0044] When the driving motor 10 is not powered, the clutch column 33 is adsorbed to the clutch surface 311 by magnetic force, and the driving gear 21 is not locked with the connecting piece 50, which means that in the case that the equipment stops running or the motor is powered off, the connection between the driving wheel 2 and the driving gear 21 is automatically disconnected, and the driving wheel 2 can rotate freely or move under the action of external force without being restricted by the driving gear 21, for example, when the equipment needs to be manually pushed or adjusted in position, such automatic separation function makes the operation more convenient.

[0045] When the driving motor 10 is powered, the driving motor 10 drives the driving gear 21 to rotate, and under the action of centrifugal force, the clutch column 33 is separated from the clutch surface 311 and clamped into the groove 52 of the connecting piece 50, so that the driving gear 21 is locked with the connecting piece 50, and the driving wheel 2 is driven to rotate. This automatic combination based on centrifugal force does not require additional complex control mechanism, so that the power transmission is more direct and efficient.

[0046] Meanwhile, the centrifugal force control clutch provided by the clutch 30 in the present application also has certain overload protection function. When the driving wheel 2 encounters excessive resistance, causing the rotation speed of the driving gear 21 to suddenly decrease, the centrifugal force will also decrease accordingly. If the resistance is large enough to make the centrifugal force smaller than the magnetic force, the clutch column 33 will be adsorbed to the clutch surface 311 again, and the locking between the driving gear 21 and the connecting piece 50 is released, so as to avoid damage of the driving motor 10 due to overload, and the safety of the whole driving system is protected.

[0047] The centrifugal force is a physical quantity that changes rapidly in the application file with the rotation speed of the driving gear 21. When the driving motor 10 is powered on, the rotation speed of the driving gear 21 rises rapidly, and the centrifugal force also increases rapidly. The clutch column 33 can be separated from the clutch surface 311 and clamped into the groove 52 in a short time, realizing the rapid locking of the driving gear 21 and the connecting piece 50, so that the driving wheel 2 can obtain power in time and start to rotate. The quick response characteristics make the start of the driving structure 1 in the application file more sensitive, and improve the work efficiency. At the same time, the contact between the clutch column 33 and the clutch surface 311 and the groove 52 is intermittent during the clutching process, and only friction occurs at the moment of clutching combination and separation. Compared with some traditional clutching methods, such as friction plate clutch, this intermittent contact method can reduce friction and wear, prolong the service life of the clutch 30, and improve the reliability and durability of the entire driving system.

[0048] The clutch ring 31, the clutch block 32, the clutch column 33 and other components in the application file are combined together, and the space occupied is small. This compact structure can be well integrated into the driving structure 1, especially in the design of placing the driving structure 1 in the driving wheel 2, which can make full use of the limited space and make the entire driving system more compact and portable.

[0049] Preferably, please refer to Figure 8 The clutch surface 311 is arc-shaped and transitions, and in the application file, the clutch surface 311 further comprises a clutch plane 3111 and an arc-shaped transition surface 3112. The clutch plane 3111 is connected with the arc-shaped transition surface 3112, and preferably, both ends of the clutch plane 3111 are connected with the arc-shaped transition surface 3112. The arc surface 3113 is connected with the arc-shaped transition surface 3112, and the arc shapes of the arc-shaped transition surface 3112 and the arc surface 3113 are different, that is, the arc-shaped transition surface 3112 is concave, and the arc surface 3113 is convex. In the application file, four sets of clutch surfaces 311 and four sets of arc surfaces 3113 are arranged on the clutch ring 31 along the circumferential direction, and two clutch columns 33 are arranged around the clutch surface 311. Since four grooves 52 are arranged around the cavity 51, the four sets of clutch surfaces 311 can be matched with the four grooves 52 at will, and the clutch column 33 can be clamped into any two grooves 52. It can be understood that in other embodiments, the number of clutch surfaces 311, arc surfaces 3113, clutch columns 33 and grooves 52 can be freely set, as long as the clutch column 33 can be magnetically attracted to the clutch surface 311 and clamped into the groove 52.

[0050] In the present application, the set of engagement surfaces 311 is composed of a section of engagement plane 3111 and two sections of arc-shaped transition surface 3112, and the arc-shaped transition surface 3112 and the arc-shaped convexity of the arc surface 3113 are different. This design enables the clutch column 33 to move more smoothly between the engagement surface 311 and the groove 52 during the engagement process. When the driving motor 10 is started, the centrifugal force causes the clutch column 33 to disengage from the engagement surface 311, and the arc-shaped transition surface 3112 on both sides of the engagement plane 3111 can guide the clutch column 33 to move outward gradually, avoiding the generation of a larger impact and vibration of the clutch column 33 due to sudden force, ensuring the stability of the engagement process, and reducing the damage to the clutch 30 and the entire driving structure 1. When the driving motor 10 stops, the clutch column 33 returns to the engagement surface 311 under the magnetic adsorption effect, and the arc-shaped transition surface 3112 can also play a guiding role, enabling the clutch column 33 to return to the engagement surface 311 accurately and stably, avoiding the occurrence of jamming or misalignment, and ensuring the reliability of the engagement function.

[0051] Preferably, a limiting ring 60 is provided between the clutch ring 31 and the connecting piece 50, and the side of the limiting ring 60 facing the clutch ring 31 is a limiting plane for limiting the axial movement of the clutch column 33. The limiting ring 60 is concentrically arranged with the central shaft 22 and rotates synchronously with the central shaft 22. Further preferably, the diameter of the limiting ring 60 is the same as the arc diameter of the arc surface 3113.

[0052] The side of the limiting ring 60 facing the clutch ring 31 is a limiting plane, which can effectively limit the axial movement of the clutch column 33. During the engagement process, the clutch column 33 is subjected to various forces such as centrifugal force and magnetic force, and may have a tendency to move axially. If not limited, the axial movement of the clutch column 33 may result in its inability to accurately switch between the engagement surface 311 and the groove 52 of the connecting piece 50, affecting the normal implementation of the engagement function. The presence of the limiting ring 60 ensures that the clutch column 33 can only move on the predetermined circular path, i.e., its corresponding engagement surface 311, making the engagement process more stable and reliable.

[0053] Since the diameter of the limiting ring 60 is the same as the arc diameter of the arc surface 3113 and the diameter of the recess 51 of the connecting piece 50, and is concentrically arranged with the central shaft 22 and rotates synchronously, the cooperation between the limiting ring 60, the clutch ring 31 and the recess 51 is more compact, and the movement space of the clutch column 33 is further limited. When the clutch column 33 moves along the corresponding clutch surface 311, the limiting ring 60 can provide accurate guidance and constraint, and the movement trajectory of the clutch column 33 under the action of centrifugal force and magnetic force is more accurate, thereby improving the accuracy of the clutching action, ensuring that the driving gear 21 and the connecting piece 50 can be accurately locked and unlocked at the right time, and ensuring the accuracy of power transmission. Moreover, the limiting ring 60 rotates synchronously with the central shaft 22, which associates the movement of the clutch ring 31, the clutch column 33 and other components with the movement of the central shaft 22, so that the entire clutch structure becomes a more compact whole.

[0054] In addition, in the present application, referring to Figure 4 and Figure 5 , the connecting piece 50 is provided with a connecting groove 53, which is used to cooperate with the connecting shaft 5 on the right wheel cover 4 to realize the connection between the driving structure 1 and the right wheel cover 4. Preferably, the connecting groove 53 and the connecting shaft 5 in the present scheme are both provided in a flower shape.

[0055] The connecting groove 53 is arranged on the connecting piece 50, and the connecting shaft 5 is arranged on the right wheel cover 4, and the two are used in cooperation to realize the firm connection between the driving structure 1 and the right wheel cover 4. This connection mode can effectively transmit torque and power, and ensure that relative sliding or disengagement does not occur between the driving structure 1 and the right wheel cover 4 during the rotation of the driving wheel 2, thereby ensuring the normal operation of the entire driving system.

[0056] The connecting groove 53 and the connecting shaft 5 are both provided in a flower shape. The structure of the flower shape increases the contact area of the connection part, so that the torque can be transmitted more uniformly. Compared with ordinary circular or square connection, the flower-shaped connection can withstand greater torque, reduces the risk of component damage caused by torque concentration, improves the efficiency of power transmission, and enables the power of the driving motor 10 to be transmitted to the right wheel cover 4 more effectively to drive the driving wheel 2 to rotate.

[0057] The flower-shaped connecting groove 53 and the connecting shaft 5 have a certain guiding property. During installation, the operator can more easily align the connecting shaft 5 with the connecting groove 53 and insert it, thereby reducing the installation difficulty and improving the installation efficiency. At the same time, when maintenance or replacement of components is required, the flower-shaped connection is also convenient to disassemble. Only a certain axial force needs to be applied to pull out the connecting shaft 5 from the connecting groove 53, thereby reducing the maintenance time and cost.

[0058] The pattern connection used in the present application can compensate for the installation error between the connecting piece 50 and the right wheel cover 4 to a certain extent. Since the pattern structure has multiple protrusions and grooves 52, even if there is a certain angle deviation or position deviation during installation, the pattern connection can be fine-tuned through its own structural characteristics to better match the connecting shaft 5 with the connecting groove 53, ensuring the reliability and stability of the connection.

[0059] Preferably, referring to Figure 6 With Figure 9 , the wheel frame assembly 40 is provided with a motor mounting position for assembling the driving motor 10, so that the driving motor 10 can move axially relative to the wheel frame assembly 40; the motor mounting position is also provided with a motor pressure ring 72 to limit the axial movement of the driving motor 10. In the present embodiment, the motor mounting position includes a motor mounting groove 70 provided on the first wheel frame 41 and a motor mounting hole 71 provided on the second wheel frame 42, and the motor pressure ring 72 extends from the hole wall of the motor mounting hole 71 to form a direction away from the first wheel frame 41. Preferably, in the present embodiment, the motor pressure ring 72 is generally U-shaped as a whole, and does not completely cover the driving motor 10, so as to facilitate heat dissipation of the driving motor 10. Among them, the driving motor 10 is not fixed on the wheel frame assembly 40 by screws or other fixing members, but is installed in a movable manner on the wheel frame through the motor mounting groove 70 and the motor mounting hole 71, facilitating disassembly and replacement of the driving motor 10.

[0060] Further preferably, referring to Figure 6 With Figure 9 , a resilient member 73 is clamped between the motor pressure ring 72 and the driving motor 10, providing a buffer for the axial movement of the driving motor 10 within the motor pressure ring 72.

[0061] Further, the present application also provides an electric trolley, which comprises a folding frame connected with a guide wheel and a driving wheel 2, and the driving wheel 2 is provided with the driving structure 1 of any one of the above embodiments, so that the electric trolley of the present application has the beneficial effects of any one of the above driving structures 1, which will not be described here.

[0062] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A drive structure, characterized by, The driving structure is used to drive the rotation of the driving wheel, and is arranged in the driving wheel. The driving structure comprises a driving motor, a gear transmission, a clutch and a wheel frame assembly, the driving motor and the gear transmission are connected with the wheel frame assembly, the driving motor is in transmission connection with one end of the gear transmission and drives the rotation of the gear transmission, the other end of the gear transmission is used to be in transmission connection with the driving wheel through the clutch and drive the rotation of the driving wheel; The clutch comprises a clutch ring and a clutch column, the clutch ring is provided with a clutch surface, the clutch surface comprises a clutch flat surface and an arc transition surface connected with the clutch flat surface, and the clutch column can be magnetically adsorbed on the clutch surface.

2. The driving structure according to claim 1, wherein The wheel frame assembly comprises a first wheel frame and a second wheel frame, the first wheel frame is fixedly connected with the second wheel frame, and the first wheel frame and the second wheel frame are oppositely arranged.

3. The driving structure according to claim 1, wherein The clutch ring further comprises an arc surface, the arc surface is connected with the arc transition surface, and the arc surface and the arc transition surface are convex in different directions.

4. The driving structure according to claim 3, wherein The clutch ring is provided with four groups of clutch surfaces and four groups of arc surfaces, each group of the clutch surfaces comprises a clutch flat surface, and the two ends of the clutch flat surface are connected with an arc transition surface.

5. The driving structure according to claim 1, wherein The gear transmission comprises a driving gear, the driving gear is connected with the driving wheel through a connecting piece, and the clutch is clamped between the driving gear and the connecting piece.

6. The driving structure according to claim 5, wherein The clutch further comprises a clutch block, the driving gear is fixedly provided with the clutch block on the side facing the connecting piece, the clutch ring is sleeved on the clutch block, and the clutch ring is driven to rotate through the clutch block; a concave cavity is arranged on the side of the connecting piece facing the driving gear, the concave cavity is used to embed the clutch ring and the clutch block, and a groove for accommodating the clutch column is arranged on the circumferential surface of the concave cavity; when the driving motor is not powered, the clutch column is magnetically adsorbed on the clutch surface, and the driving gear and the connecting piece are not locked; when the driving motor is powered, the driving motor drives the rotation of the driving gear, under the action of centrifugal force, the clutch column is separated from the clutch surface and clamped into the groove of the connecting piece, the locking of the driving gear and the connecting piece is realized, and the driving wheel is driven to rotate.

7. The driving structure according to claim 6, wherein A limiting ring is arranged between the clutch ring and the connecting piece, the side of the limiting ring facing the clutch ring is a limiting flat surface, and the limiting flat surface is used to limit the axial movement of the clutch column.

8. The driving structure according to any one of claims 1-7, wherein A motor mounting position is arranged on the wheel frame assembly to assemble the driving motor, and a motor pressing ring is arranged on the motor mounting position to limit the axial movement of the driving motor. ​ ​ 9. The driving structure according to claim 8, characterized in that, a spring is arranged between the motor pressing ring and the driving motor.

10. An electrically powered trolley characterised by comprising: a folding frame, the folding frame is connected with a guide wheel and a driving wheel, the driving wheel is provided with the driving structure according to any one of claims 1-9.

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