A brushless DC hub motor

Abstract

The utility model relates to the technical field of wheel hub motors, and in particular to a brushless DC wheel hub motor; it comprises a wheel hub module, a motor module, a reduction box module, and a built-in electromagnetic brake system module; the motor shaft of the motor module passes through the housing of the reduction box module and is connected with the electromagnetic brake friction plate of the built-in electromagnetic brake system module; the built-in electromagnetic brake system module is also provided with a brake coil, a brake spring, and a brake armature; the spring pops out the brake armature, the brake armature limits the electromagnetic brake friction plate, and the electromagnetic brake friction plate locks the motor shaft of the motor module; after the brake coil is energized, a magnetic brake spring is generated and the brake armature is attracted, the brake armature is separated from the electromagnetic brake friction plate, and the motor shaft of the motor module is unlocked, thereby achieving the effects of low cost, small size, low power consumption, high low-speed torque, large rated output speed range, and high brake sensitivity.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motors, in particular to a brushless DC hub motor. Background Art

[0002] In the development of electric vehicles, the performance of the hub motor as the core power system directly affects the performance of the entire vehicle. Although the traditional brushless DC hub motor has been used in the market to a certain extent, it still has problems such as high cost, large size, high power consumption, low low-speed torque, small rated output speed range, and low brake sensitivity. Utility Model Content

[0003] The purpose of the utility model is to provide a brushless DC hub motor to address the defects in the prior art, so as to achieve the effects of low cost, small size, low power consumption, high low-speed torque, large rated output speed range, and high brake sensitivity.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a brushless DC hub motor, including a hub module, a motor module, a reduction box module, and a built-in electromagnetic brake system module; the motor shaft of the motor module passes through the housing of the reduction box module and is connected to the electromagnetic brake friction pad of the built-in electromagnetic brake system module; the built-in electromagnetic brake system module is also provided with a brake coil, a brake spring, and a brake armature; the brake spring pops out the brake armature, the brake armature limits the electromagnetic brake friction pad, and the electromagnetic brake friction pad locks the motor shaft of the motor module; after the brake coil is energized, it generates magnetism to compress the brake spring and absorb the brake armature, the brake armature disengages from the electromagnetic brake friction pad, and the motor shaft of the motor module is unlocked.

[0005] Furthermore, the motor shaft is configured to be a double-sided flat body shape and is rigidly connected to the first-stage gear of the reduction box module. The first-stage gear is coupled with the second-stage gear and then connected to the fourth-stage gear of the hub module via the third-stage gear.

[0006] Furthermore, a rigid wear-resistant gasket and a shock-absorbing rubber gasket are provided at the connection portion between the motor shaft and the first-stage gear.

[0007] Furthermore, the wheel hub module is also provided with a wheel hub, a wheel hub cover plate and a bearing, and the wheel hub and its external rubber ring are provided in an integrated form.

[0008] Furthermore, the bearing is press-fitted onto the wheel hub and the wheel hub cover.

[0009] Furthermore, the wheel hub and the wheel hub cover are fastened together by bolts.

[0010] Furthermore, the reduction box module is a two-stage transmission.

[0011] The invention comprises a wheel hub module, a motor module, a reduction gearbox module and a built-in electromagnetic brake system module; the motor shaft of the motor module passes through the housing of the reduction gearbox module and is connected with the electromagnetic brake friction pad of the built-in electromagnetic brake system module; the built-in electromagnetic brake system module is also provided with a brake coil, a brake spring, a brake armature and a spring; the spring pops out the brake armature, the brake armature limits the electromagnetic brake friction pad, and the electromagnetic brake friction pad locks the motor shaft of the motor module; the brake coil generates a magnetic brake spring and attracts the brake armature after being energized, the brake armature is separated from the electromagnetic brake friction pad, and the motor shaft of the motor module is unlocked, thereby achieving the effects of low cost, small size, low power consumption, high low-speed torque, large rated output speed range and high braking sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of a brushless DC hub motor of the utility model;

[0014] Figure 2 This is an exploded view of the brushless DC hub motor of the utility model;

[0015] Figure 3 This is a schematic diagram of a hub module of the present utility model;

[0016] Figure 4 This is a schematic diagram of a hub module of the present utility model;

[0017] Figure 5 This is a schematic diagram of a reduction box module of the utility model;

[0018] Figure 6 This is a schematic diagram of a motor module of the utility model;

[0019] Figure 7 This is a schematic diagram of the built-in electromagnetic brake system module of the utility model;

[0020] Reference numerals:

[0021] Wheel hub module 1, fourth-stage gear 1-1, wheel hub cover 1-2, bearing 1-3, wheel hub 1-4, rubber ring 1-5, motor module 2, motor shaft 2-1, reduction box module 3, first-stage gear 3-1, second-stage gear 3-2, third-stage gear 3-3, built-in electromagnetic brake system module 4, electromagnetic brake friction plate 4-1, brake coil 4-2, brake spring 4-3, brake armature 4-4. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] In the description of the present invention, it should be noted that the directions or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] A brushless DC hub motor, such as Figure 1 , 2 As shown, it includes a wheel hub module 1, a motor module 2, a reduction box module 3, and a built-in electromagnetic brake system module 4; the motor shaft 2-1 of the motor module 2 passes through the housing of the reduction box module 3 and is connected to the electromagnetic brake friction pad 4-1 of the built-in electromagnetic brake system module 4; the built-in electromagnetic brake system module 4 is also provided with a brake coil 4-2, a brake spring 4-3, and a brake armature 4-4; the brake spring 4-3 pops out the brake armature 4-4, the brake armature 4-4 limits the electromagnetic brake friction pad 4-1, and the electromagnetic brake friction pad 4-1 locks the motor shaft 2-1 of the motor module 2; after the brake coil 4-2 is energized, it generates magnetism to compress the brake spring 4-3 and attract the brake armature 4-4, the brake armature 4-4 is separated from the electromagnetic brake friction pad 4-1, and the motor shaft 2-1 of the motor module 2 is unlocked.

[0025] Specifically, it includes a wheel hub module 1, a motor module 2, a reduction box module 3, and a built-in electromagnetic brake system module 4; the motor shaft 2-1 of the motor module 2 passes through the housing of the reduction box module 3 and is connected to the electromagnetic brake friction pad 4-1 of the built-in electromagnetic brake system module 4; the built-in electromagnetic brake system module 4 is also provided with a brake coil 4-2, a brake spring 4-3, a brake armature 4-4, and a brake spring 4-3; the brake spring 4-3 pops out the brake armature 4-4, the brake armature 4-4 limits the electromagnetic brake friction pad 4-1, and the electromagnetic brake friction pad 4-1 locks the motor module 2 of the motor shaft 2-1; the brake coil 4-2 generates a magnetic brake spring 4-3 and attracts the brake armature 4-4 after being energized, and the brake armature 4-4 is separated from the electromagnetic brake friction plate 4-1, and the motor shaft 2-1 of the motor module 2 is unlocked, so that the motor shaft 2-1 passes through the gear box and is directly connected to the electromagnetic brake friction plate 4-1. When the electromagnetic brake friction plate 4-1 and the motor of the motor module 2 are powered on at the same time, the brake coil 4-2 generates a magnetic rear brake spring 4-3 and attracts the brake armature 4-4, so that the brake armature 4-4 is separated from the electromagnetic brake friction plate 4-1, and the motor runs normally at this time. On the contrary, when the brake is powered off, the magnetism of the brake coil 4-2 disappears, the brake spring 4-3 pops out the armature, and the brake armature 4-4 presses against the electromagnetic brake friction plate 4-1, thereby locking the motor shaft 2-1 and stopping the motor from rotating. The unique brake structure and position not only improve the speed of the brake response, but also ensure the reliability and safety of the brake system. The built-in electromagnetic brake system module is directly integrated into the motor module and the reduction box module, which reduces the complexity of the overall system and the required installation space, making the structure of the entire hub motor more compact and suitable for application scenarios with various size restrictions. Since the brake system is directly connected to the motor shaft, the energy loss during the transmission process is reduced, and the overall energy efficiency of the system is improved. The built-in electromagnetic brake system reduces the parts and connectors required for the external brake system, reduces the failure rate, and reduces the cost of maintenance and replacement. During the braking process, the rapid response and precise control of the electromagnetic brake system can reduce the heat and wear generated during braking, which is beneficial to energy conservation and emission reduction. The built-in electromagnetic brake system can quickly and effectively The motor shaft is effectively locked to prevent accidental start-up or sliding, and the safety during use is improved. The design can adapt to different load and speed requirements. By adjusting the parameters of the electromagnetic brake system, the motor shaft can be locked and unlocked accurately. The modular design of the entire hub motor system makes the installation and debugging process simpler and faster, and reduces the production and use costs. Therefore, this solution has the advantages of compact structure, high integration, high energy efficiency, low maintenance cost, environmental protection and energy saving, strong safety, strong adaptability, easy installation and debugging, high reliability and great intelligent potential. These advantages make this solution have broad application prospects in the fields of electric vehicles, electric bicycles, electric scooters, etc.Thus, through mass production of standardized modules, production costs can be reduced while maintaining high quality standards. Customers only need to choose the required module combination without paying extra for unnecessary functions. The modular design allows for rapid assembly and testing, greatly shortening the time from design to delivery. Different motors, reducers and brake modules can also be selected according to their specific needs. This personalized configuration method ensures that each application can obtain the motor system that best suits its performance requirements, with a variety of reduction ratio options to adapt to different speed and torque requirements. Whether it is an occasion that requires high torque and low speed operation, or an application that requires high-speed flexibility, it can provide a perfect solution. The modular design makes future maintenance and upgrades simple. Each module can be disassembled and replaced independently without replacing the entire system. At the same time, environmentally friendly materials and manufacturing processes are used to reduce waste and energy consumption in the production process, which is in line with the concept of sustainable development. The modular motor system is compatible with international standards and can be used on different electric vehicle platforms around the world to serve global customers.

[0026] As a preferred embodiment of the above, Figure 2 , 6 As shown, the motor shaft 2-1 is set to a double-sided flat body shape and is rigidly connected to the first-stage gear 3-1 of the reduction box module 3. The first-stage gear 3-1 is coupled with the second-stage gear 3-2, and then connected to the fourth-stage gear 1-1 of the hub module 1 through the third-stage gear 3-3.

[0027] Specifically, the motor shaft 2-1 is set to a double-sided flat body shape and is hard-connected to the first-stage gear 3-1 of the reduction box module 3. The first-stage gear 3-1 is coupled with the second-stage gear 3-2, and then connected to the fourth-stage gear 1-1 of the hub module 1 through the third-stage gear 3-3. This structure is used to increase the contact area between the shaft and the gear, thereby improving the stability and carrying capacity of the transmission. Secondly, in order to match a specific gear shape or reduction box design to achieve a better transmission effect, the motor shaft 2-1 passes through the housing of the reduction box module 3 and is directly hard-connected to the first-stage gear 3-1 to ensure that no relative displacement or sliding occurs during the transmission process.

[0028] As a preferred embodiment of the above, Figure 6 As shown, a rigid wear-resistant gasket and a shock-absorbing rubber gasket are provided at the connection portion between the motor shaft 2-1 and the first-stage gear 3-1.

[0029] Specifically, a structure of rigid wear-resistant gaskets and shock-absorbing rubber gaskets is provided at the connection portion between the motor shaft 2-1 and the first-stage gear 3-1 to reduce wear and absorb vibration, prevent direct wear between the motor shaft and the gear, extend their service life, and effectively isolate vibration transmission, thereby improving the stability and reliability of the entire transmission system.

[0030] As a preferred embodiment of the above, Figure 3 As shown, the hub module 1 is also provided with a hub 1-4, a hub cover plate 1-2 and a bearing 1-3, and the hub 1-4 and its external rubber ring 1-5 are provided in an integrated form.

[0031] Specifically, the wheel hub module 1 is also provided with a wheel hub 1-4, a wheel hub cover 1-2 and a bearing 1-3. The wheel hub 1-4 and its external rubber ring 1-5 are configured as an integrated structure to improve the strength and durability of the wheel hub. Since there is no seam or gap between the rubber ring and the wheel hub, potential failure points are reduced, and the sealing between the tire and the wheel hub is further improved to prevent air leakage or moisture intrusion.

[0032] As a preferred embodiment of the above, Figure 3 As shown, the wheel hub 1-4 and the wheel hub cover plate 1-2 are both press-fitted with the bearing 1-3.

[0033] Specifically, the structure in which the bearing 1-3 is press-fitted on both the wheel hub 1-4 and the wheel hub cover plate 1-2 is used to ensure that the wheel hub can rotate smoothly, reduce friction and wear, and improve the operating efficiency of the system.

[0034] As a preferred embodiment of the above, Figure 3 As shown, the wheel hub 1-4 is fastened to the wheel hub cover plate 1-2 by bolts.

[0035] Specifically, the stability of the hub cover 1-2 is further enhanced by the structure in which the wheel hub 1-4 is fastened to the hub cover 1-2 by bolts.

[0036] As a preferred embodiment of the above, Figure 5 As shown, the reduction box module 3 is a two-stage transmission.

[0037] Specifically, the reduction box module 3 has a two-stage transmission structure and can be adjusted to adapt the transmission structure, so that the solution has multiple reduction ratio options and can adapt to different speed and torque requirements. Whether it is an occasion that requires high torque and low speed operation, or an application that requires high speed and flexibility, it can provide a perfect solution.

[0038] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A brushless DC hub motor, characterized in that: It includes a wheel hub module (1), a motor module (2), a reduction gearbox module (3), and a built-in electromagnetic brake system module (4); The motor shaft (2-1) of the motor module (2) passes through the housing of the reduction box module (3) and is connected to the electromagnetic brake friction plate (4-1) of the built-in electromagnetic brake system module (4); The built-in electromagnetic brake system module (4) is also provided with a brake coil (4-2), a brake spring (4-3), and a brake armature (4-4); The brake spring (4-3) pops out the brake armature (4-4), the brake armature (4-4) limits the electromagnetic brake friction plate (4-1), and the electromagnetic brake friction plate (4-1) locks the motor shaft (2-1) of the motor module (2); When the brake coil (4-2) is energized, it generates magnetism to compress the brake spring (4-3) and attract the brake armature (4-4), so that the brake armature (4-4) is separated from the electromagnetic brake friction plate (4-1), and the motor shaft (2-1) of the motor module (2) is unlocked.

2. The brushless DC hub motor according to claim 1, characterized in that: The motor shaft (2-1) is configured to be in a double-sided flat body shape and is rigidly connected to the first-stage gear (3-1) of the reduction box module (3); the first-stage gear (3-1) is coupled to the second-stage gear (3-2) and then connected to the fourth-stage gear (1-1) of the hub module (1) via the third-stage gear (3-3).

3. The brushless DC hub motor according to claim 2, characterized in that: A rigid wear-resistant gasket and a shock-absorbing rubber gasket are provided at the connection portion between the motor shaft (2-1) and the first-stage gear (3-1).

4. The brushless DC hub motor according to claim 1, characterized in that: The wheel hub module (1) is also provided with a wheel hub (1-4), a wheel hub cover plate (1-2) and a bearing (1-3); the wheel hub (1-4) and its external rubber ring (1-5) are provided in an integrated form.

5. The brushless DC hub motor according to claim 4, characterized in that: The bearing (1-3) is press-fitted onto the wheel hub (1-4) and the wheel hub cover plate (1-2).

6. The brushless DC hub motor according to claim 5, characterized in that: The wheel hub (1-4) and the wheel hub cover plate (1-2) are fastened and connected via bolts.

7. The brushless DC hub motor according to claim 1, characterized in that: The reduction box module (3) is a two-stage transmission.

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