Electromagnetic braking type hub motor and Mecanum wheel servo module
By introducing an external electromagnetic brake unit and an internal circuit board into the Mecanum wheel drive system, automatic power-off braking is achieved, solving the safety hazard problem of Mecanum wheels when power is off, simplifying the system structure and reducing costs.
Patent Information
- Application Number
- CN202423229921.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-26
AI Technical Summary
Existing Mecanum wheel drive systems may cause vehicles to lose control in the event of a sudden power outage or control system failure, posing a safety hazard. Furthermore, existing braking schemes increase system complexity and cost, and affect response speed and flexibility.
An external electromagnetic braking unit is adopted, which can achieve automatic braking by inserting the braking position when the power is off. Combined with the built-in circuit board, it ensures that the electromagnetic braking unit enters the braking state at the moment of power failure, and provides a manual unlocking function to avoid increasing the system size.
Automatic braking in the event of a power outage prevents vehicle movement, improves safety, simplifies system structure, reduces costs, and maintains responsiveness and flexibility.
Smart Images
Figure CN223625700U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to Mecanum wheels, specifically including an electromagnetic brake hub motor and a Mecanum wheel servo module. Background Technology
[0002] Mecanum drive systems typically rely on a continuous power supply from an electric motor to maintain motion or a stationary position. In practical applications, there is a risk of sudden power outages or control system malfunctions, which could cause the vehicle to lose control, especially under heavy loads or on inclines, potentially leading to safety issues. To address this challenge, solutions with mechanical or electronic braking systems have emerged to reliably lock the wheels in the event of power failure, preventing unintended movement.
[0003] While existing braking solutions can improve safety to some extent, they often increase system complexity and cost, and may affect vehicle responsiveness and maneuverability. Furthermore, some braking devices require additional electrical power or hydraulic / pneumatic assistance, which not only limits their application scenarios but also reduces the overall reliability of the system. Utility Model Content
[0004] The purpose of this utility model is to provide an electromagnetic braking hub motor, which adds an external electromagnetic braking part and constructs a series of braking positions on the external rotor part. When the electromagnetic braking part is de-energized, the telescopic part inserts into the braking position to achieve automatic braking, thereby solving the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an electromagnetic brake hub motor, comprising an end cover I and a fixing sleeve, wherein the end cover I is fixedly connected to the fixing sleeve, and a mounting shaft is coaxially arranged on the outer side of the end cover I. A stator portion and an external rotor portion are arranged inside the fixing sleeve, and the rotor portion is fixedly connected to a central rotating shaft assembly. The external rotor portion is located between the stator portion and the end cover I, and a brake disc is arranged on the side of the external rotor portion closest to the end cover I, with several braking positions arranged around the center on the brake disc. An electromagnetic brake portion is installed on the outer surface of the end cover I, and the telescopic portion of the electromagnetic brake portion passes through the end cover I. When the electromagnetic brake portion is de-energized, the telescopic portion inserts into the braking position.
[0006] In the above technical solution, the stator is fixedly installed, and the external rotor is movably covered outside the stator and fixedly connected to a central rotating shaft assembly that is coaxially and movably installed with the fixed sleeve. Therefore, the external rotor drives the central rotating shaft assembly for synchronous transmission. In this solution, a brake disc is installed on the side of the external rotor near end cover I, and an electromagnetic brake is installed on end cover I. When the electromagnetic brake is de-energized, the telescopic part of the electromagnetic brake passes through end cover I and inserts into the brake position on the brake disc, thereby achieving braking of the hub motor. This solution uses an external electromagnetic brake, so it does not increase the overall size of the hub motor and facilitates the maintenance of the braking mechanism.
[0007] As a preferred embodiment, the hub motor also includes a built-in circuit board, and the electromagnetic braking unit is electrically connected to the circuit board to achieve power failure braking, ensuring that the electromagnetic braking unit enters the braking state the instant the hub motor is powered off, and automatically releases the braking when the hub motor is powered on.
[0008] As a preferred embodiment, the electromagnetic braking unit includes an electromagnet, the telescopic unit includes a telescopic shaft of the electromagnet, and a brake head mounted on the front end of the telescopic shaft; preferably, the electromagnetic braking unit also includes a limiting block, which is fixedly mounted on the end cover I, and a limiting hole is provided in the middle of the limiting block. The brake head is movably inserted into the limiting hole, and in the braking state, the front end of the brake head extends out of the limiting hole. The brake head uses a metal part with a large diameter to improve its structural strength. The limiting block can provide lateral support to the brake head, ensuring that it will not shift due to the reaction force of the brake disc during braking, while improving the stability of the brake head. Furthermore, the brake head can effectively protect the electromagnet from damage by the reaction force.
[0009] As a preferred embodiment, the electromagnetic braking unit includes an outermost protective shell, which is installed on the end cover I. The electromagnet is located inside the protective shell to protect the electromagnet and keep it in a stable working environment. In addition, in the non-braking state, the end of the telescopic shaft does not extend out of the protective shell to ensure that the telescopic shaft does not come into contact with foreign objects.
[0010] As a preferred embodiment of the electromagnetic braking unit, a manual unlocking port is provided on the protective shell. The telescopic part can be pulled back through the manual unlocking port. In the braking state, when the electromagnetic braking unit fails, the braking of the telescopic part to the external rotor can be manually released by using a tool through the manual unlocking port.
[0011] As another preferred embodiment of the electromagnetic braking unit, a mounting hole is provided at the rear of the protective shell, facing the end of the telescopic part, and an unlocking component is movably installed in the mounting hole. The unlocking component does not interfere with the normal extension and retraction of the telescopic shaft, and an end cap is provided at the rear end of the telescopic shaft that is movably locked inside the unlocking component. When the electromagnetic braking unit fails, the braking can be manually released by moving the unlocking component backward without the need for other tools.
[0012] Another objective of this invention is to provide a Mecanum wheel servo module that can automatically brake when power is lost. This can effectively prevent mobile devices from continuing to move due to inertia or slipping on slopes when the Mecanum wheel is powered off, thereby preventing dangerous accidents caused by power failure during the use of mobile devices.
[0013] To achieve the above objectives, this utility model provides a Mecanum wheel servo module, which includes the aforementioned electromagnetic brake hub motor, a Mecanum wheel hub, and multiple rollers disposed on the outer periphery of the Mecanum wheel hub; the Mecanum wheel hub is mounted on a fixed sleeve of the hub motor, and a bearing is installed between the fixed sleeve and the Mecanum wheel hub; the Mecanum wheel servo module also includes an end cap II, which simultaneously fixes the central shaft assembly and the Mecanum wheel hub. Attached Figure Description
[0014] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:
[0015] Figure 1 A partially disassembled structural diagram of an electromagnetic brake hub motor provided for an embodiment of this utility model;
[0016] Figure 2 for Figure 1 A schematic diagram showing the positional relationship between the external rotor and the electromagnetic braking unit in the hub motor shown;
[0017] Figure 3 for Figure 1 A schematic diagram of the disassembled structure of the electromagnetic braking unit;
[0018] Figure 4 for Figure 3 Schematic diagram of the installation structure of the unlocking sleeve;
[0019] Figure 5 for Figure 4 A cross-sectional view of the unlocking sleeve;
[0020] Figure 6 This is a schematic diagram of the second type of protective shell;
[0021] Figure 7 This is a schematic diagram of the structure of the Mecanum wheel servo module provided in the embodiment of this utility model;
[0022] Figure 8 for Figure 7 The diagram shows the split structure of the Mecanum wheel servo module.
[0023] In the figure, the components are: end cap I1, fixing sleeve 2, mounting shaft 3, stator 4, external rotor 5, central rotating shaft assembly 6, electromagnetic brake 7, bearing mounting position 8, Mecanum wheel hub 10, roller 11, end cap II 12, bearing 13, brake disc 51, brake position 52, protrusion 53, brake head 701, clearance hole 101, protective shell 702, mounting ear I 703, electromagnet 704, telescopic shaft 705, limit block 706, limit hole 707, unlocking sleeve 708, handle 709, external thread 710, threaded hole 711, mounting ear II 712, end cap 713, and shaft hole 714. Detailed Implementation
[0024] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.
[0025] Figure 1 A schematic diagram of the disassembled structure of an electromagnetic braking hub motor is shown. The hub motor includes an end cover I1 and a hollow mounting sleeve 2. The end cover I1 is bolted to the left end of the mounting sleeve 2, and a coaxial mounting shaft 3 is provided on the left side of the end cover I1. This mounting shaft 3 is used to mount the entire hub motor onto the wheel mounting bracket at the bottom of the mobile device. The hub motor also includes a stator 4 and an external rotor 5 disposed inside the mounting sleeve 2, as well as a circuit board. The stator 4 and the circuit board are fixedly mounted inside the mounting sleeve 2; the external rotor 5 is located between the stator 4 and the end cover I1. Figure 2 As shown, a brake disc 51 is provided on the side of the external rotor 5 near the end cover I1. Multiple protrusions 53 are arranged in a ring array on the side of the brake disc 51 near the end cover I1, and a brake position 52 is formed between the protrusions 53. A clearance hole 101 is provided through the end cover I1, and an electromagnetic brake 7 is installed on the outer surface of the end cover I1. The telescopic part of the electromagnetic brake 7 passes through the clearance hole 101 on the end cover I1. The electromagnetic brake 7 is connected to the circuit board through wires. When the hub motor is de-energized, the electromagnetic brake 7 is de-energized simultaneously. At this time, the front part of the telescopic part is inserted into the corresponding brake position 52 to realize the rotation of the hub motor.
[0026] like Figure 3As shown, the electromagnetic braking unit 7 used in this embodiment includes an electromagnet 704 and a limiting block 706. The limiting block 706 is directly mounted on the end cover I1, and the electromagnet 704 is fixedly mounted against the limiting block 706. The middle part of the limiting block 706 protrudes to pass through the clearance hole 101, and a limiting hole 707 is provided transversely through the middle position of the limiting block 706. The braking head 701 is movably mounted in the limiting hole 707. The front end of the telescopic shaft 705 of the electromagnet 704 is connected to the braking head 701, thereby controlling the movement of the braking head 701. The electromagnetic braking unit 7 also includes an outermost protective shell 702, which is fixedly mounted on the end cover I1 by its own mounting ears I703, and covers the electromagnet 704 and the limiting block 706 inside, providing the electromagnet 704 with an independent working environment.
[0027] Combination Figure 4 and Figure 5 As can be seen, a threaded hole 711 is provided at the rear of the protective shell 702, facing the telescopic shaft 705, for installing the unlocking sleeve 708. The unlocking sleeve 708 has only a section of external thread 710 at its rear for threaded connection with the threaded hole 711. The unlocking sleeve 708 has a completely open hollow structure at its rear end, with its end located outside the protective shell 702 and equipped with a handle 709. The front end has a shaft hole 714 with a diameter larger than that of the telescopic shaft 705, and the telescopic shaft 705 is held inside the unlocking sleeve 708 by an end cap 713 at its rear end. In the energized state, the telescopic shaft 705 moves backward without exceeding the unlocking sleeve 708. In the braking (or de-energized state) state, the end cap 713 approaches the front of the unlocking sleeve 708. Therefore, the unlocking sleeve 708 will not interfere with the operation of the electromagnetic braking unit 7. Conversely, when the electromagnet 704 malfunctions, the braking state of the brake disc 51 can be released by pulling out the unlocking sleeve 708.
[0028] In addition, this embodiment also provides a structure that facilitates manual unlocking, such as... Figure 6 As shown, a circular operating hole 715 is directly opened at the rear of the protective shell 702. It can also be square or other shapes. When the electromagnet 704 fails, insert a tool into the operating hole 715 and use the tool to pull the telescopic shaft 705 backward.
[0029] Based on the above-described electromagnetic braking hub motor, this utility model also provides... Figure 7 The Mecanum wheel servo module shown includes a Mecanum wheel hub 10 and a plurality of rollers 11 disposed on the outer periphery of the Mecanum wheel hub 10. Specifically, as... Figure 8As shown, two bearing mounting positions 8 are provided on the outer periphery of the right side of the aforementioned hub motor mounting sleeve, and bearings 13 are respectively installed on the two bearing mounting positions 8. The Mecanum wheel hub 10 is fitted onto the bearings 13. An end cover II12 is provided on the right end face. The middle part of the end cover II12 is installed on the right end of the central rotating shaft assembly 6, so that it rotates synchronously with the central rotating shaft assembly 6. The edge of the end cover II12 is fixed to the Mecanum wheel hub 10 by bolts. Therefore, when the external rotor 5 rotates, the Mecanum wheel hub 10 starts to rotate. For mobile devices equipped with this Mecanum wheel servo module, when the hub motor suddenly loses power, the electromagnetic brake 7 enters the braking state synchronously to achieve braking. This can effectively prevent the mobile device from continuing to move due to inertia. At the same time, when walking on a slope, the power-off braking function can also prevent the mobile device from sliding backward, thereby preventing dangerous accidents caused by power failure during the use of the mobile device.
[0030] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.
[0031] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.
[0032] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.
Claims
1. An electromagnetic brake hub motor, comprising an end cover I and a fixing sleeve, wherein the end cover I is fixedly connected to the fixing sleeve, and a mounting shaft is coaxially arranged on the outer side of the end cover I; a stator portion and an external rotor portion are arranged inside the fixing sleeve, and the rotor portion is fixedly connected to a central rotating shaft assembly, characterized in that: The external rotor section is located between the stator section and the end cover I. A brake disc is provided on the side of the external rotor section near the end cover I, and several brake positions are arranged around the center on the brake disc. An electromagnetic brake section is installed on the outer surface of the end cover I. The telescopic part of the electromagnetic brake section passes through the end cover I. When the electromagnetic brake section is de-energized, the telescopic part inserts into the brake position.
2. The electromagnetic braking hub motor as described in claim 1, characterized in that: The hub motor also includes a built-in circuit board, and the electromagnetic braking unit is electrically connected to the circuit board.
3. The electromagnetic braking hub motor as described in claim 2, characterized in that: The electromagnetic braking part includes an electromagnet, the telescopic part includes a telescopic shaft of the electromagnet, and a brake head installed at the front end of the telescopic shaft.
4. The electromagnetic braking hub motor as described in claim 3, characterized in that: The electromagnetic braking unit also includes a limiting block, which is fixedly installed on the end cover I. A limiting hole is provided in the middle of the limiting block. The braking head is movably inserted into the limiting hole, and in the braking state, the front end of the braking head extends out of the limiting hole.
5. The electromagnetic braking hub motor as described in claim 4, characterized in that: The electromagnetic braking unit includes an outermost protective shell, which is installed on the end cover I. The electromagnet is located inside the protective shell, and in the non-braking state, the end of the telescopic shaft does not extend outside the protective shell.
6. The electromagnetic braking hub motor as described in claim 5, characterized in that: A manual unlocking port is provided on the protective shell, through which the telescopic part can be pulled back to release the braking of the external rotor.
7. The electromagnetic braking hub motor as described in claim 5, characterized in that: A mounting hole is provided at the rear of the protective shell, facing the end of the telescopic part, and an unlocking component is movably installed in the mounting hole. The unlocking component does not interfere with the normal extension and retraction of the telescopic shaft, and an end cap is provided at the rear end of the telescopic shaft that is movably locked inside the unlocking component.
8. A Mecanum wheel servo module, characterized in that: The hub motor according to any one of claims 2-7 further includes a Mecanum wheel hub and a plurality of rollers disposed on the outer periphery of the Mecanum wheel hub; the Mecanum wheel hub is mounted on a fixed sleeve of the hub motor, and a bearing is installed between the fixed sleeve and the Mecanum wheel hub; the Mecanum wheel servo module further includes an end cap II, which simultaneously fixes the central shaft assembly and the Mecanum wheel hub.