Hub motor integrated with internal transmission

Abstract

The utility model relates to a hub motor integrated with an internal transmission, which comprises a rotating shaft, a motor core, a hub, a transmission, a driving wheel, a left end cover and a right end cover, a partition plate is arranged in the hub, the hub is divided into a left cabin and a right cabin by the partition plate, a connecting hole is formed in the partition plate, and the rotating shaft penetrates through the connecting hole and is rotatably connected with the partition plate; the motor core is arranged on the rotating shaft in the left cabin and is connected with the hub; and the transmission is arranged on the rotating shaft in the right cabin and is connected with the hub. The beneficial effects are that 1, the motor core is separated from the transmission, scrap iron and the like worn by transmission side gear transmission cannot enter the gear transmission of the motor core, the gear transmission of the motor core cannot be influenced, and the service life of the gear transmission of the motor core can be effectively prolonged; performance testing can be carried out on the motor core without a transmission, problems can be found in advance, the qualified rate of final products is improved, and the technological process of repairing is reduced.

Description

Technical Field

[0001] The utility model relates to the field of electric bicycle motors, and more specifically, to a hub motor with an integrated internal transmission. Background Art

[0002] The existing hub motor with integrated internal speed change for electric power-assisted bicycles is a motor that integrates the motor, transmission gear system and internal speed changer inside the wheel hub, and most of them are based on automatic speed change, using the centrifugal force principle. When the speed is greater than X code, the gear is upshifted; when the speed is lower than X code, the gear is downshifted. Motor description: The internal speed changer involved here is not the speed change of the motor drive output, but refers to the human foot pedaling crank to drive the chain to rotate, thereby driving the sprocket to rotate and achieve speed change. This speed change is mainly to achieve the ease and effort of human pedaling under different working conditions. It has nothing to do with the power ultimately output by the motor.

[0003] In the prior art, the internal transmission is usually integrated into the motor hub. The planetary gears in the planetary reduction system of the motor are generally plastic gears, such as PA66, and the gears on the internal transmission side are mainly steel gears. When the internal transmission is running, the steel gears will wear and produce iron filings and other particles. During use, these particles may enter the planetary reduction system side, which will accelerate the failure of the nylon gears.

[0004] Therefore, how to prevent particles generated by the wear of steel gears from entering the planetary reduction system is the technical problem to be solved by this application. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model proposes a technical solution for a hub motor with an integrated internal transmission, which separates the motor movement from the transmission through a partition plate, so that iron filings (powder) and the like from the worn gear transmission on the transmission side will not enter the gear transmission of the motor movement, and will not affect the gear transmission of the motor movement, which can effectively improve the gear transmission service life of the motor movement. The technical solution of the utility model is as follows:

[0006] A hub motor with an integrated internal transmission comprises a rotating shaft, a motor movement, a hub, a transmission, a drive wheel, a left end cover and a right end cover. A partition plate is arranged inside the hub, and the partition plate divides the hub into a left compartment and a right compartment. A connecting hole is opened on the partition plate, and the rotating shaft passes through the connecting hole and is rotatably connected to the partition plate.

[0007] The motor movement is arranged on the rotating shaft in the left cabin and connected with the wheel hub for controlling the rotation of the wheel hub. The left end cover is arranged on the left side of the wheel hub and is provided with a cover hole for the rotating shaft to pass through.

[0008] The transmission is arranged on a rotating shaft in the right cabin and connected to the wheel hub. The right end cover is arranged on the right side of the wheel hub and is provided with a cover hole for the transmission to pass through. The transmission wheel is arranged on the right side of the right end cover and connected to the transmission.

[0009] In summary, the above technical solution has the following beneficial effects: the motor movement is controlled to rotate by an electrical signal, and drives the wheel hub to rotate, the pedal and the transmission wheel are linked, and the wheel hub is controlled to rotate by the transmission, and the pedal and the transmission wheel can be connected by a chain or a belt. The design of this application has the following advantages: 1. The motor movement is separated from the transmission, and the iron filings (powder) and the like worn by the transmission side gear transmission will not enter the gear transmission of the motor movement, will not affect the gear transmission of the motor movement, and can effectively improve the gear transmission service life of the motor movement; 2. The motor movement can be tested for performance without installing the transmission, which can detect problems in advance, improve the qualification rate of the final product, and reduce the process flow of rework. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic cross-sectional view of a wheel hub motor with an integrated internal transmission;

[0011] Figure 2 A schematic diagram of a partition plate of a wheel hub motor with an integrated internal transmission;

[0012] Figure 3 A schematic diagram of a transmission for a hub motor with an integrated internal transmission.

[0013] 10. Shaft; 20. Motor movement; 21. Stator; 22. Rotor; 23. Planetary reducer; 24. Clutch; 25. Cable; 30. Hub; 40. Transmission; 41. Support seat; 42. PCB assembly; 43. Drive motor; 44. Ratchet assembly; 45. Control line; 50. Drive wheel; 60. Left end cover; 70. Right end cover; 80. Partition plate; 81. Connecting hole. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. The same parts are represented by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "bottom surface" and "top surface", "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0015] like Figure 1-2As shown, a hub motor with an integrated internal transmission includes a rotating shaft 10, a motor movement 20, a wheel hub 30, a transmission 40, a transmission wheel 50, a left end cover 60 and a right end cover 70, wherein a partition plate 80 is arranged in the wheel hub 30, and the partition plate 80 divides the wheel hub 30 into a left compartment and a right compartment, and a connecting hole 81 is opened on the partition plate 80, and the rotating shaft 10 passes through the connecting hole 81 and is rotatably connected to the partition plate 80; the motor movement 20 is arranged on the rotating shaft 10 located in the left compartment and is connected to the wheel hub 30 for controlling the rotation of the wheel hub 30, and the left end cover 60 is arranged on the left side of the wheel hub 30 and is provided with a cover hole for the rotating shaft 10 to pass through; the transmission 40 is arranged on the rotating shaft 10 located in the right compartment and is connected to the wheel hub 30, the right end cover 70 is arranged on the right side of the wheel hub 30 and is provided with a cover hole for the transmission 40 to pass through, and the transmission wheel 50 is arranged on the right side of the right end cover 70 and is connected to the transmission 40. The motor movement 20 is controlled to rotate by an electrical signal, and drives the wheel hub 30 to rotate. The pedal and the transmission wheel 50 are linked, and the rotation of the wheel hub 30 is controlled by the transmission 40. The pedal and the transmission wheel 50 can be connected by a chain or a belt. The design of this application has the following advantages: 1. The motor movement 20 is separated from the transmission 40, and the iron filings (powder) and the like worn by the gear transmission on the transmission 40 side will not enter the gear transmission of the motor movement 20, and will not affect the gear transmission of the motor movement 20, which can effectively improve the gear transmission service life of the motor movement 20; 2. The motor movement 20 can be tested for performance without installing the transmission 40, which can find problems in advance, improve the qualification rate of the final product, and reduce the process flow of rework.

[0016] The motor movement 20 includes a stator 21, a rotor 22, a planetary reducer 23 and a clutch 24 located in the left compartment. The stator 21 is fixedly connected to the rotating shaft 10, the rotor 22 is rotatably connected to the rotating shaft 10, the rotor 22 is connected to the wheel hub 30 through the planetary reducer 23, and the clutch 24 is arranged on the rotating shaft 10 and connected to the planetary reducer 23. The planetary reducer 23 includes structures such as planetary gears, sun gears and ring gears, which are used to change the torque of the rotor 22. The planetary gears in the planetary reducer 23 are made of plastic, such as PA66, etc. The clutch 24 is used to control the clutch between the planetary reducer 23 and the rotor 22.

[0017] The planetary gears in the planetary reducer 23 are made of plastic. The planetary gears made of plastic have the advantages of low cost, easy mass production, and low noise. The partition plate 80 of the present application can provide good protection for the planetary gears made of plastic. Of course, the planetary gears can be made of metal. The structure of the present application can also prevent the motor movement 20 and the transmission 40 from interfering with each other, thereby improving the life of the motor of the hub 30.

[0018] like Figure 3As shown, the transmission 40 includes a support seat 41, a PCB assembly 42, a drive motor 43 and a ratchet assembly 44 located in the right compartment. The support seat 41 is arranged on the rotating shaft 10, the PCB assembly 42 and the drive motor 43 are arranged on the support seat 41, the ratchet assembly 44 is arranged on the rotating shaft 10, the PCB assembly 42 is connected to the drive motor 43, and is used to control the rotation of the drive motor 43, and the drive motor 43 is connected to the ratchet assembly 44, and is used to control the gear shifting of the ratchet assembly 44. The transmission 40 is a manual automatic transmission 40, and the rotation speed of the internal speed hub is obtained through the Hall element, which is used to automatically control the gear shifting of the internal speed hub, and the gear shifting device is controlled by the drive motor 43 to rotate to different angles, so as to control different ratchets to open or retract, and then switch to different gears. For details, please refer to the internal speed hub with a built-in motor, a bicycle and a gear shifting control method with the announcement number CN116476968A, which discloses the specific structure and operation principle of the driving mechanism, the gear shifting control mechanism and the transmission mechanism.

[0019] The ratchet assembly 44 is made of metal.

[0020] The rotating shaft 10 and the connecting hole 81 are connected by a bearing. The connecting hole 81 is provided with a bearing, which can make the rotating shaft 10 more stable when rotating, so that the transmission of the motor movement 20 and the transmission 40 is more stable. The rotor 22, the left end cover 60, the right end cover 70 and the rotating shaft 10 are also rotatably connected by the bearing.

[0021] The motor core 20 is provided with a cable 25, and the cable 25 extends to the outside through the cover hole of the left end cover 60. Specifically, the stator 21 extends the cable 25, and the shaft 10 is provided with a cable hole for the cable 25 to extend out. The shaft 10 extends from the cover hole of the left end cover 60 to the outside, and the cable 25 extends to the outside through the cable hole of the shaft 10.

[0022] The transmission 40 is provided with a control line 45, which extends to the outside through the cover hole of the right end cover 70. Specifically, the PCB assembly 42 extends with a control line 45, which extends to the outside through the cover hole of the right end cover 70. The wheel hub 30 motor has two-side outlets, the motor cable 25 exits from the left side to drive the motor 43, and the transmission 40 control line 45 exits from the right side to control the speed change of the internal transmission 40. The advantage of this design is that the internal transmission 40 can be modularized, easy to disassemble, and convenient for after-sales.

[0023] The transmission 40 used in the motor is a manual-automatic transmission 40, which forms a system with the motor controller and has two modes: manual and automatic. When the automatic mode is adopted, the controller receives a speed signal from the motor end. When the speed is greater than the N1 code, the controller sends a control signal to the internal transmission 40, drives the control motor to rotate forward, changes the gear position of the internal transmission 40, and makes the internal transmission 40 work in the M2 gear; when the speed is greater than the N2 code, makes the internal transmission 40 work in the M3 gear. Similarly, when the speed changes from high to low, in the high gear, the internal transmission 40 works in the M3 gear. When the speed is less than N2, the controller sends a control signal to the internal transmission 40, drives the control motor to rotate in the reverse direction, changes the gear position of the internal transmission 40, and makes the internal transmission 40 work in the M2; when the speed drops to less than the N1 code, the internal transmission 40 works in the M1 gear. When the internal transmission 40 is in manual mode, the controller sends a signal to the controller through the key to shift up or down, and the controller sends a signal to the internal transmission 40 through the internal transmission 40 control line 45, thereby driving the control motor to rotate to achieve the internal transmission 40 shifting.

[0024] The advantages of this application include: 1. The motor-side speed reducer is separated from the internal transmission 40, and the iron filings (powder) and the like of the gear transmission worn by the internal transmission 40 will not enter the gear transmission on the motor side, and will not affect the gear transmission on the motor side, which can effectively improve the service life of the gear transmission on the motor side. 2. The motor can be tested for performance without installing the internal transmission 40, which can detect problems in advance, improve the qualified rate of the final product, and reduce the process flow of rework.

[0025] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A hub motor with an integrated internal transmission, comprising a rotating shaft (10), a motor core (20), a hub (30), a transmission (40), a transmission wheel (50), a left end cover (60) and a right end cover (70), characterized in that: A partition plate (80) is arranged inside the wheel hub (30), and the partition plate (80) divides the wheel hub (30) into a left compartment and a right compartment. A connecting hole (81) is provided on the partition plate (80), and the rotating shaft (10) passes through the connecting hole (81) and is rotatably connected to the partition plate (80); The motor core (20) is arranged on the rotating shaft (10) located in the left compartment and connected to the wheel hub (30) for controlling the rotation of the wheel hub (30); the left end cover (60) is arranged on the left side of the wheel hub (30) and is provided with a cover hole for the rotating shaft (10) to pass through; The transmission (40) is arranged on a rotating shaft (10) located in the right compartment and connected to the wheel hub (30); the right end cover (70) is arranged on the right side of the wheel hub (30) and is provided with a cover hole for the transmission (40) to pass through; the transmission wheel (50) is arranged on the right side of the right end cover (70) and connected to the transmission (40).

2. The wheel hub motor with integrated internal transmission according to claim 1, characterized in that: The motor movement (20) comprises a stator (21), a rotor (22), a planetary reducer (23) and a clutch (24) located in a left compartment; the stator (21) is fixedly connected to a rotating shaft (10); the rotor (22) is rotatably connected to the rotating shaft (10); the rotor (22) is connected to a wheel hub (30) via the planetary reducer (23); and the clutch (24) is arranged on the rotating shaft (10) and connected to the planetary reducer (23).

3. The wheel hub motor with integrated internal transmission according to claim 2, characterized in that: The planetary gears in the planetary reducer (23) are made of plastic.

4. The wheel hub motor with integrated internal transmission according to claim 1, characterized in that: The transmission (40) includes a support base (41) located in the right compartment, a PCB assembly (42), a drive motor (43) and a ratchet assembly (44), wherein the support base (41) is arranged on the rotating shaft (10), the PCB assembly (42) and the drive motor (43) are arranged on the support base (41), the ratchet assembly (44) is arranged on the rotating shaft (10), the PCB assembly (42) and the drive motor (43) are connected to control the rotation of the drive motor (43), and the drive motor (43) and the ratchet assembly (44) are connected to control the gear shifting of the ratchet assembly (44).

5. The wheel hub motor with integrated internal transmission according to claim 4, characterized in that: The ratchet assembly (44) is made of metal.

6. A wheel hub motor with integrated internal transmission according to any one of claims 1 to 5, characterized in that: The rotating shaft (10) and the connecting hole (81) are connected via a bearing.

7. A wheel hub motor with integrated internal transmission according to any one of claims 1 to 5, characterized in that: The motor core (20) is provided with a cable (25), and the cable (25) extends to the outside through a cover hole of the left end cover (60).

8. A hub motor with integrated internal transmission according to any one of claims 1 to 5, characterized in that: The transmission (40) is provided with a control line (45), and the control line (45) extends to the outside through a cover hole of the right end cover (70).

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