Direct-current brushless driving wheel structure

Abstract

The utility model discloses a direct current brushless driving wheel structure, which belongs to the technical field of motor and electric drive, and comprises two connecting columns, a support plate is arranged between the two connecting columns, a fireproof box is fixedly connected to the top of the support plate close to the center, and the fireproof box is fixedly connected with the support plate. A power supply mechanism is arranged in the fireproof box, and two transmission mechanisms are arranged at the positions, close to the supporting plate, between the two connecting columns. Through the design of the transmission mechanisms, power is provided for the device through a direct-current brushless motor, a sun wheel drives a planet wheel to rotate, and then output is conducted through a planet carrier; according to the transmission system, torque output of the whole transmission system is more stable, larger loads can be borne, the wheelchair can bear large-weight people, the planetary gears are designed into helical teeth, impact and vibration generated by sudden meshing and separation of gear teeth can be effectively reduced, and noise in the transmission process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motors and electric drive, in particular to a direct current brushless drive wheel structure. Background Art

[0002] In various types of power-driven equipment, the drive wheel structure plays a core role. Its performance is directly related to the equipment's operating efficiency, stability and control experience. From industrial automation equipment to daily travel tools, the technological innovation of drive wheels continues to promote the development of related industries. In the early days, wheels driven by brushed motors were widely used, but with the development of technology and the increase in demand, their drawbacks gradually emerged, and the DC brushless drive wheel structure came into being.

[0003] The common DC brushless drive wheel structure adopts chain transmission. In the process of transmitting power, there will inevitably be a certain amount of energy loss. These losses will reduce the overall efficiency of the drive wheel and increase energy consumption. Especially in some equipment that needs to run for a long time, the accumulation of energy loss will lead to a decrease in the endurance of the equipment. When this type of structure is applied to a wheelchair, it will lead to insufficient endurance of the wheelchair, and due to reasons such as chain friction, it will generate a lot of noise.

[0004] Therefore, there is an urgent need to provide a DC brushless drive wheel structure to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to overcome the disadvantages of the prior art and provide a DC brushless drive wheel structure.

[0006] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a DC brushless drive wheel structure, including two connecting columns, a support plate is installed between the two connecting columns, a fireproof box is fixedly connected to the top of the support plate near the center position, a protective door is rotatably connected to the top of the fireproof box, a power supply mechanism is arranged inside the fireproof box, two transmission mechanisms are arranged between the two connecting columns near the support plate, a wheel hub is installed on one side of the two transmission mechanisms, a plurality of hexagonal bolts are rotatably connected to one side of the two wheel hubs, and tires are installed on the outer walls of the two wheel hubs.

[0007] The utility model is further configured as follows: the power supply mechanism includes two batteries installed inside a fireproof box, a power management module is installed on the top of the support plate close to the fireproof box, a power adapter is installed on the top of the support plate, one side of the power adapter is fixedly connected to a wire, the other end of the wire is fixedly connected to a plug, and converters are installed on both sides of the support plate.

[0008] Through the above technical solution, the battery inside the fireproof box serves as the main energy storage element, providing raw electrical energy for the entire system. The power management module plays a key role in power regulation and management. It monitors the status of the battery in real time. The main function of the power adapter is to convert external AC power into DC power suitable for system use. When the plug is inserted into the external AC power socket, the power adapter will transform, rectify, filter and perform a series of processes on the input AC power to convert the high-voltage AC power into a low-voltage DC power acceptable to the system to charge the battery. The converter is used to convert the fixed DC voltage output by the battery into a voltage level suitable for the DC brushless motor.

[0009] The utility model is further configured as follows: the two transmission mechanisms are symmetrically mounted on both sides of the support plate.

[0010] Through the above technical solution, the symmetrically installed transmission mechanism can evenly distribute the force on both sides of the wheelchair, avoiding the wheelchair from tilting, deforming or even being damaged due to excessive force on one side, and ensuring that the entire device maintains good stability during operation.

[0011] The utility model is further configured as follows: the transmission mechanism includes a mounting block installed between two connecting columns, a DC brushless motor is installed inside the mounting block, an output end of the DC brushless motor is fixedly connected to a sun gear, a bracket is fixedly connected between the two connecting columns, a plurality of planetary gears are rotatably connected inside the bracket, a gear ring is fixedly connected to the inner wall of the bracket, a planet carrier is installed on the outer sides of the plurality of planetary gears, and a plurality of screw holes are opened inside the planet carrier.

[0012] Through the above technical solution, when the DC brushless motor starts to run after being energized, the rotational motion of the rotor inside the DC brushless motor is transmitted to the sun gear fixedly connected thereto through the output end, so that the sun gear starts to rotate as an active component, providing power input for the entire transmission mechanism. Due to the rotation of the sun gear, a tangential force is applied to the planetary gear meshing therewith, thereby driving the planetary gear to rotate around its own axis. Under the drive of the sun gear, the planetary gear not only rotates, but also revolves around the axis of the sun gear under the constraint of the ring gear. The ring gear plays a role in fixing and constraining the motion trajectory of the planetary gear, thereby ensuring the stability and accuracy of the transmission. The planetary gear will drive the planetary carrier to rotate together during the revolution, and the planetary carrier will eventually drive the wheel hub and the tire to rotate.

[0013] The utility model is further configured as follows: the input end of the converter is connected to the battery, and the output end is electrically connected to the input end of the brushless DC motor.

[0014] Through the above technical solution, the converter can adjust the voltage output by the battery, raising or lowering it to a voltage range applicable to the DC brushless motor, thereby ensuring that the DC brushless motor can operate stably.

[0015] The utility model is further configured as follows: the plurality of planetary gears are meshed with the sun gear and the ring gear, and the ring gear adopts a helical gear design.

[0016] Through the above technical solution, the progressiveness of the helical tooth meshing makes the contact and disengagement process between the gear teeth smoother, which can effectively reduce the impact and vibration caused by the sudden engagement and separation of the gear teeth, reduce the noise during the transmission process, and ensure the smoothness of the transmission.

[0017] The utility model is further configured as follows: the hexagonal bolts are installed inside the screw holes in a one-to-one correspondence manner.

[0018] Through the above technical solution, the screw holes on the planet carrier correspond to the hexagonal bolts one by one, which can provide a stable and reliable connection. The shape and structure of the hexagonal bolts enable them to generate a large pre-tightening force after tightening, firmly connecting the planet carrier with other components, ensuring that during the transmission process, there will be no relative displacement between the planet carrier and related components, thereby ensuring the stability and accuracy of the planetary gear transmission system.

[0019] The beneficial effects of the utility model are as follows:

[0020] 1. The utility model designs a transmission mechanism, uses a brushless DC motor to provide power for the device, drives the planetary gear to rotate through the sun gear, and then outputs it through the planetary carrier, so that the torque output of the entire transmission system is more stable and can withstand a larger load, so that the wheelchair can bear heavy people, and the planetary gear adopts a helical tooth design, which can effectively reduce the impact and vibration caused by the sudden engagement and separation of the gear teeth, reduce the noise during the transmission process, and is beneficial to the patient's recuperation.

[0021] 2. The utility model connects the wheel hub to the planetary carrier through hexagonal bolts, drives the planetary carrier to rotate through a transmission mechanism, and finally drives the wheel hub to rotate, thereby realizing the movement of the wheelchair, reducing the consumption of energy transmission, and the staff only needs to use hexagonal bolts to quickly install and replace, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the utility model;

[0023] Figure 2 It is a top view of the utility model;

[0024] Figure 3 It is a schematic diagram of the power supply mechanism of the utility model;

[0025] Figure 4 This is a schematic diagram of the hub structure of the utility model;

[0026] Figure 5It is a schematic diagram of the transmission mechanism of the utility model.

[0027] In the figure: 1. connecting column; 2. supporting plate; 3. fireproof box; 4. protective door; 5. power supply mechanism; 501. battery; 502. power management module; 503. power adapter; 504. wire; 505. plug; 506. converter; 6. transmission mechanism; 601. mounting block; 602. DC brushless motor; 603. sun gear; 604. bracket; 605. planetary gear; 606. ring gear; 607. planetary carrier; 608. screw hole; 7. wheel hub; 8. hexagonal bolt; 9. tire. DETAILED DESCRIPTION

[0028] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0029] See also Figure 1 and Figure 2 A DC brushless drive wheel structure includes two connecting columns 1, a support plate 2 is installed between the two connecting columns 1, a fireproof box 3 is fixedly connected to the top of the support plate 2 at the center position, and a protective door 4 is rotatably connected to the top of the fireproof box 3.

[0030] like Figure 3 As shown, a power supply mechanism 5 is arranged inside the fireproof box 3, and the power supply mechanism 5 includes two batteries 501 installed inside the fireproof box 3, a power management module 502 is installed on the top of the support plate 2 near the fireproof box 3, a power adapter 503 is installed on the top of the support plate 2, a wire 504 is fixedly connected to one side of the power adapter 503, and a plug 505 is fixedly connected to the other end of the wire 504, and converters 506 are installed on both sides of the support plate 2. The battery 501 inside the fireproof box 3 serves as the main energy storage element to provide original power for the entire system, and the power management module 50 2 plays a key role in regulating and managing power. It monitors the status of the battery 501 in real time. The main function of the power adapter 503 is to convert the external AC power into DC power suitable for the system. When the plug 505 is inserted into the external AC power socket, the power adapter 503 transforms, rectifies, filters and performs a series of processes on the input AC power to convert the high-voltage AC power into a low-voltage DC power acceptable to the system to charge the battery 501. The converter 506 is used to convert the fixed DC voltage output by the battery 501 into a voltage level suitable for the DC brushless motor 602.

[0031] like Figure 5As shown, two transmission mechanisms 6 are arranged between the two connecting columns 1 near the support plate 2. The two transmission mechanisms 6 are symmetrically installed on both sides of the support plate 2. The symmetrically installed transmission mechanisms 6 can evenly distribute the forces on both sides of the wheelchair, avoid tilting, deformation or even damage of the wheelchair due to excessive force on one side, and ensure that the whole device maintains good stability during operation. The transmission mechanism 6 includes a mounting block 601 installed between the two connecting columns 1, and a DC brushless motor 602 is installed inside the mounting block 601. The input end of the converter 506 is connected to the battery 501, and the output end is electrically connected to the input end of the DC brushless motor 602. The converter 506 can adjust the voltage output by the battery 501, increase or decrease it to a voltage range applicable to the DC brushless motor 602, to ensure that the DC brushless motor 602 can run stably, and the output end of the DC brushless motor 602 is fixedly connected to a sun gear 603, and a bracket 604 is fixedly connected between the two connecting columns 1. The bracket 604 is internally rotatably connected to Multiple planetary gears 605 are meshed with the sun gear 603 and the ring gear 606, and the ring gear 606 adopts a helical gear design. The progressiveness of the helical gear meshing makes the contact and disengagement process between the gear teeth smoother, which can effectively reduce the impact and vibration caused by the sudden meshing and separation of the gear teeth, reduce the noise during the transmission process, and ensure the stability of the transmission. The inner wall of the bracket 604 is fixedly connected with the ring gear 606, and the outer sides of the multiple planetary gears 605 are installed with a planet carrier 607. The interior of the planet carrier 607 is provided with multiple screw holes 608, and the hexagonal bolts 8 are installed in the screw holes 608 in a one-to-one manner. The screw holes 608 on the planet carrier 607 correspond to the hexagonal bolts 8 in a one-to-one manner, which can provide a stable and reliable connection. The shape and structure of the hexagonal bolts 8 enable it to generate a large pre-tightening force after tightening, and firmly connect the planet carrier 607 with other components to ensure that during the transmission process, there will be no relative displacement between the planet carrier 607 and related components, thereby ensuring the stability and accuracy of the planetary gear transmission system.

[0032] like Figure 5As shown, when the DC brushless motor 602 is powered on and starts to run, the rotational motion of the rotor inside the DC brushless motor 602 is transmitted to the sun gear 603 fixedly connected thereto through the output end, so that the sun gear 603 starts to rotate as an active component, providing power input for the entire transmission mechanism 6. Due to the rotation of the sun gear 603, a tangential force is applied to the planetary gear 605 meshing therewith, thereby driving the planetary gear 605 to rotate around its own axis. Driven by the sun gear 603, the planetary gear 605 not only rotates, but also revolves around the axis of the sun gear 603 under the constraint of the ring gear 606. The ring gear 606 plays a role in fixing and constraining the motion trajectory of the planetary gear 605, thereby ensuring the stability and accuracy of the transmission. During the revolution, the planetary gear 605 drives the planetary carrier 607 to rotate together, and the planetary carrier 607 finally drives the wheel hub 7 and the tire 9 to rotate.

[0033] like Figure 1 - Figure 4 As shown, a wheel hub 7 is installed on one side of the two transmission mechanisms 6 , a plurality of hexagonal bolts 8 are rotatably connected to one side of the two wheel hubs 7 , and tires 9 are installed on the outer walls of the two wheel hubs 7 .

[0034] When the utility model is in use, two connecting posts 1 are installed at the bottom of the wheelchair, and then the various components of the device are installed in sequence at the positions specified by the two connecting posts 1. After completing the installation steps, the device can be controlled to be driven by the control component. When the power supply mechanism 5 receives the instruction, the battery 501 will start to discharge, and the converter 506 can adjust the voltage output by the battery 501, raising or lowering it to the voltage range applicable to the DC brushless motor 602. At this time, the DC brushless motor 602 will start to operate, so that the sun gear 603 as an active part starts to rotate, thereby driving the planetary gear 605 to rotate around its own axis. Under the drive of the sun gear 603, the planetary gear 605 not only rotates, but also revolves around the axis of the sun gear 603 under the constraint of the ring gear 606. The ring gear 606 plays a role in fixing and constraining the motion trajectory of the planetary gear 605, ensuring the stability and accuracy of the transmission. The planetary gear 605 will drive the planetary carrier 607 to rotate together during the revolution, and the planetary carrier 607 will eventually drive the wheel hub 7 and the tire 9 to rotate, and finally realize the movement of the wheelchair.

[0035] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A brushless DC drive wheel structure, comprising two connecting columns (1), characterized in that: A support plate (2) is installed between the two connecting columns (1); a fireproof box (3) is fixedly connected to the top of the support plate (2) at a central position; a protective door (4) is rotatably connected to the top of the fireproof box (3); a power supply mechanism (5) is arranged inside the fireproof box (3); two transmission mechanisms (6) are arranged between the two connecting columns (1) near the support plate (2); a wheel hub (7) is installed on one side of the two transmission mechanisms (6); a plurality of hexagonal bolts (8) are rotatably connected to one side of the two wheel hubs (7); and tires (9) are installed on the outer walls of the two wheel hubs (7).

2. A DC brushless drive wheel structure according to claim 1, characterized in that: The power supply mechanism (5) comprises two batteries (501) installed inside the fireproof box (3); a power management module (502) is installed on the top of the support plate (2) close to the fireproof box (3); a power adapter (503) is installed on the top of the support plate (2); a wire (504) is fixedly connected to one side of the power adapter (503); a plug (505) is fixedly connected to the other end of the wire (504); and converters (506) are installed on both sides of the support plate (2).

3. A brushless DC drive wheel structure according to claim 1, characterized in that: The two transmission mechanisms (6) are symmetrically mounted on both sides of the support plate (2).

4. A brushless DC drive wheel structure according to claim 2, characterized in that: The transmission mechanism (6) comprises a mounting block (601) mounted between two connecting columns (1); a brushless DC motor (602) is mounted inside the mounting block (601); an output end of the brushless DC motor (602) is fixedly connected to a sun gear (603); a bracket (604) is fixedly connected between the two connecting columns (1); a plurality of planetary gears (605) are rotatably connected inside the bracket (604); a gear ring (606) is fixedly connected to the inner wall of the bracket (604); a planet carrier (607) is mounted on the outer sides of the plurality of planetary gears (605); and a plurality of screw holes (608) are provided inside the planet carrier (607).

5. A DC brushless drive wheel structure according to claim 4, characterized in that: The input end of the converter (506) is connected to the battery (501), and the output end is electrically connected to the input end of the brushless DC motor (602).

6. A brushless DC drive wheel structure according to claim 4, characterized in that: The plurality of planetary gears (605) are all meshed with the sun gear (603) and the ring gear (606), and the ring gear (606) adopts a helical gear design.

7. A DC brushless drive wheel structure according to claim 4, characterized in that: The hexagonal bolts (8) are installed inside the screw holes (608) in a one-to-one correspondence.

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