CN219101905U - Drum brake cover drainage structure of permanent magnet brushless direct current hub motor of electric bicycle - Google Patents
Drum brake cover drainage structure of permanent magnet brushless direct current hub motor of electric bicycle Download PDFInfo
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- CN219101905U CN219101905U CN202223110352.1U CN202223110352U CN219101905U CN 219101905 U CN219101905 U CN 219101905U CN 202223110352 U CN202223110352 U CN 202223110352U CN 219101905 U CN219101905 U CN 219101905U
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- drum brake
- brake cover
- cover
- permanent magnet
- electric bicycle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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Abstract
The utility model discloses a drum brake cover drainage structure of a permanent magnet brushless direct current hub motor of an electric bicycle, which comprises a drum brake cover, a hub, a motor shaft and a drum brake; the drum brake cover is characterized in that a cylindrical barrel body is arranged on the outer side of the drum brake cover, a bearing chamber is arranged on the inner side of the drum brake cover, a bearing is arranged in the bearing chamber, the drum brake cover is fixedly connected with a hub, the drum brake cover is rotatably arranged on a motor shaft through the bearing, a drum brake is arranged on the motor shaft, a drum brake of the drum brake is arranged in the barrel body inner cavity of the drum brake cover, and at least one annular drainage groove is formed in the outer wall surface of the barrel body of the drum brake cover. The utility model can prevent or greatly reduce rainwater and clean water from entering the inner cavity of the drum brake cover cylinder, can better ensure good braking performance of the drum brake and normal operation of the motor, and has longer service life.
Description
Technical Field
The utility model relates to a permanent magnet brushless direct current hub motor of an electric bicycle, in particular to a drum brake cover drainage structure of the permanent magnet brushless direct current hub motor of the electric bicycle, and belongs to the technical field of hub motors.
Background
The permanent magnet brushless DC hub motor is generally arranged on an electric bicycle and is a high-efficiency, pollution-free and low-noise rotary driver, and the permanent magnet brushless DC hub motor has the biggest characteristics that power, transmission and braking devices are integrated into a hub, so that the mechanical part of the electric bicycle is greatly simplified.
The existing permanent magnet brushless direct current hub motor of the electric bicycle comprises a drum brake cover, a hub, a motor shaft and a drum brake; the drum brake cover is characterized in that a cylindrical barrel body is arranged on the outer side of the drum brake cover, a bearing chamber is arranged on the inner side of the drum brake cover, a bearing is arranged in the bearing chamber, the drum brake cover is fixedly connected with a hub through a screw, the drum brake cover is rotationally arranged on a motor shaft through the bearing, a drum brake is arranged on the motor shaft, and a drum brake of the drum brake is arranged in an inner cavity of the barrel body of the drum brake cover. However, the conventional permanent magnet brushless dc hub motor has the following disadvantages in the actual use process: in rainy days or when the electric vehicle is cleaned, rainwater or clean water can enter the inner cavity of the drum along the outer wall surface of the drum brake cover, rust is caused to the inner cavity of the drum, the drum brake, the bearing and other parts after long-term and long-term accumulation, the brake performance of the drum brake is weakened, even the brake is invalid, and the bearing is broken and other accidents are caused.
Disclosure of Invention
The utility model aims to solve the technical problem of overcoming the defects of the prior art and providing the drum brake cover drainage structure of the permanent magnet brushless direct current hub motor of the electric bicycle, which can prevent or greatly reduce rainwater and clean water from entering the inner cavity of the drum brake cover cylinder body, and can better ensure good drum brake performance and normal operation of the motor.
In order to solve the technical problems, the utility model adopts the drum brake cover drainage structure of the permanent magnet brushless direct current hub motor of the electric bicycle, and comprises a drum brake cover, a hub, a motor shaft and a drum brake; the drum brake cover is characterized in that a cylindrical barrel body is arranged on the outer side of the drum brake cover, a bearing chamber is arranged on the inner side of the drum brake cover, a bearing is arranged in the bearing chamber, the drum brake cover is fixedly connected with a hub, the drum brake cover is rotatably arranged on a motor shaft through the bearing, a drum brake is arranged on the motor shaft, a drum brake of the drum brake is arranged in the barrel body inner cavity of the drum brake cover, and at least one annular drainage groove is formed in the outer wall surface of the barrel body of the drum brake cover.
As a preferred embodiment of the present utility model, the cross section of the drainage channel is rectangular or trapezoidal or semicircular or circular arc.
As a preferred embodiment of the present utility model, the number of the drainage grooves is two, and the two drainage grooves are arranged at intervals and in parallel.
After the structure is adopted, the utility model has the following beneficial effects:
according to the utility model, at least one annular drainage groove is formed in the outer wall surface of the drum brake cover, so that rainwater or clean water can be discharged to the outside of the drum along the drainage groove on the outer wall surface of the drum brake cover during rainy days or electric vehicle cleaning, and rainwater and clean water are prevented or greatly reduced from entering the inner cavity of the drum brake cover, so that rust and damage to the inner cavity of the drum brake cover, drum brake, bearings and other parts caused by the large entry of rainwater and clean water are effectively prevented, good braking performance of the drum brake is better ensured, the motor can normally work, and the service life of the motor can be prolonged.
The utility model has simple structure, convenient implementation and convenient popularization.
Drawings
The following describes the embodiments of the present utility model in further detail with reference to the drawings.
Fig. 1 is a schematic diagram of a drum brake cover drainage structure of a permanent magnet brushless direct current hub motor of an electric bicycle.
Fig. 2 is a schematic perspective view of a drum brake cover according to the present utility model.
Fig. 3 is a schematic front view of the drum brake cover of the present utility model.
Detailed Description
Referring to fig. 1 to 3, a drum brake cover drainage structure of a permanent magnet brushless direct current hub motor of an electric bicycle is used for the permanent magnet brushless direct current hub motor of the electric bicycle, and comprises a drum brake cover 1, a hub 2, a motor shaft 3, a drum brake 4, a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are not shown in the figure; the outer side of the drum brake cover 1 is provided with a cylindrical barrel body 1-1, the inner side of the drum brake cover 1 is provided with a bearing chamber 1-2, a bearing 5 is arranged in the bearing chamber 1-2, the drum brake cover 1 is fixedly connected with a hub 2 through a plurality of screws, the drum brake cover 1 is rotatably arranged on a motor shaft 3 through the bearing 5, a rotor assembly is arranged in an inner cavity of the hub 2, and a stator assembly is arranged on the motor shaft 3 and is not shown in the drawing; the drum brake device 4 comprises a sleeve 4-2, the drum brake device 4 is installed on a motor shaft 3 through the sleeve 4-2, the sleeve 4-2 is sleeved on the motor shaft 3 during specific installation, the inner side surface of the sleeve 4-2 is propped against a shaft stop 3-1 of the motor shaft 3, the outer side surface of the sleeve 4-2 is propped against a frame bottom fork of an electric bicycle, the drum brake device 4 can be fixedly installed on the motor shaft 3 through a nut which is screwed on the end part of the motor shaft 3 and is arranged on the outer side of the frame bottom fork, the frame bottom fork and the nut on the outer side of the frame bottom fork of the electric bicycle are not shown in the drawing, the drum brake device 4-1 of the drum brake device 4 is arranged in the inner cavity of a cylinder 1-1 of the drum brake cover 1, and at least one annular drainage groove 6 is formed in the outer wall surface of the cylinder 1-1 of the drum brake cover 1.
As a preferred embodiment of the present utility model, as shown in fig. 1, 2 and 3, the cross section of the drain tank 6 is rectangular, trapezoid, semicircle, arc or the like, and only the cross section is rectangular, trapezoid, semicircle, arc or the like is not shown.
As a preferred embodiment of the present utility model, the number of the drainage channels 6 is two, and the two drainage channels 6 are arranged at intervals and in parallel, only one drainage channel 6 is shown in the figure, and two or more drainage channels 6 are not shown, so that the drainage effect is better when two or more drainage channels 6 are provided.
Referring to fig. 3, in a rainy day or when the electric vehicle is washed, rainwater or cleaning water 7 is discharged to the outside of the drum along the drain groove 6 on the outer wall surface of the drum brake cover drum 1-1.
Through trial, the utility model can prevent or greatly reduce rainwater and clean water from entering the inner cavity of the drum brake cover cylinder, can better ensure good braking performance of the drum brake and normal operation of the motor, has longer service life of the motor, and achieves good practical effect.
Claims (3)
1. A drum brake cover drainage structure of an electric bicycle permanent magnet brushless direct current hub motor comprises a drum brake cover (1), a hub (2), a motor shaft (3) and a drum brake (4); the drum brake cover (1) outside is equipped with barrel (1-1) of cylinder, and drum brake cover (1) inboard is equipped with bearing room (1-2) install bearing (5) in bearing room (1-2), drum brake cover (1) and wheel hub (2) fixed connection, and drum brake cover (1) pass through bearing (5) rotationally install on motor shaft (3), drum brake stopper (4) are installed on motor shaft (3), and drum brake stopper (4-1) of drum brake stopper (4) are arranged in barrel (1-1) inner chamber of drum brake cover (1), its characterized in that: at least one annular drainage groove (6) is arranged on the outer wall surface of the cylinder body (1-1) of the drum brake cover (1).
2. The electric bicycle permanent magnet brushless direct current hub motor drum brake cover drainage structure according to claim 1, wherein: the cross section of the drainage groove (6) is rectangular or trapezoid or semicircular or circular arc.
3. The electric bicycle permanent magnet brushless direct current hub motor drum brake cover drainage structure according to claim 1 or 2, characterized in that: the number of the drainage grooves (6) is two, and the two drainage grooves (6) are arranged at intervals and in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223110352.1U CN219101905U (en) | 2022-11-23 | 2022-11-23 | Drum brake cover drainage structure of permanent magnet brushless direct current hub motor of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223110352.1U CN219101905U (en) | 2022-11-23 | 2022-11-23 | Drum brake cover drainage structure of permanent magnet brushless direct current hub motor of electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219101905U true CN219101905U (en) | 2023-05-30 |
Family
ID=86455469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223110352.1U Active CN219101905U (en) | 2022-11-23 | 2022-11-23 | Drum brake cover drainage structure of permanent magnet brushless direct current hub motor of electric bicycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219101905U (en) |
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2022
- 2022-11-23 CN CN202223110352.1U patent/CN219101905U/en active Active
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