Intelligent mid-mounted motor

Abstract

The present invention discloses an intelligent mid-mounted motor, comprising a housing, a central shaft and a planetary reduction structure arranged in the housing, the central shaft and the planetary reduction structure being connected via an output gear, the output gear being sleeved on the central shaft via a one-way device, a torque sensing structure being arranged on the central shaft, the torque sensing structure being connected to a controller; the central shaft and the planetary support shaft of the planetary reduction structure being arranged in parallel. The motor of the present invention has a large reduction ratio, a small size of the motor, and good integration with the whole vehicle.

Description

Technical Field

[0001] The invention relates to the field of electric bicycles, and in particular to an intelligent mid-mounted motor. Background Art

[0002] As people's environmental awareness increases, energy-efficient electric bicycles are becoming more and more popular. People have higher and higher requirements for the electric power-assisted experience of existing bicycles. The start and stop of the power-assisted operation is particularly critical. The existing electric power-assisted motor has a small reduction ratio, a large motor size, and poor integration with the entire vehicle. Summary of the invention

[0003] The purpose of the present invention is to provide an intelligent mid-mounted motor in order to overcome the defects of the prior art.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] An intelligent mid-mounted motor comprises a shell, wherein a central shaft and a planetary reduction structure are arranged in the shell, the central shaft and the planetary reduction structure are connected via an output gear, the output gear is sleeved on the central shaft via a one-way device, a torque sensing structure is arranged on the central shaft, and the torque sensing structure is connected to a controller; the central shaft and the planetary support shaft of the planetary reduction structure are arranged in parallel.

[0006] Preferably, the planetary reduction mechanism includes a stator fixedly connected to the housing, one end of the planetary support shaft is fixed to the stator or the housing, and the other end is fixed to the inner wall of the housing, and a rotor is sleeved on the planetary support shaft; the rotor is fixedly connected to the sun gear sleeved on the planetary support shaft, and a planetary support shaft is also sleeved on the planetary support shaft, and the planetary support shaft is connected to the planetary support shaft through a bearing, and is connected to the housing through an inner gear ring; a planetary gear is arranged on the inner side of the planetary support, and the planetary gear and the sun gear are gear-connected; a planetary output wheel is fixedly provided on the outer side of the planetary support, and the planetary output wheel and the output gear are gear-connected, and the planetary output wheel and the planetary support shaft are bearing-connected.

[0007] Preferably, the planetary support shaft is rotatably connected to the shell, a rotor and a sun gear are fixedly provided on the planetary support shaft, a planetary bracket is also sleeved on the planetary support shaft, the planetary bracket is connected to the planetary support shaft by a bearing, and a stator is provided on the shell; the planetary bracket is connected to the planetary support shaft by a bearing, and is connected to the shell by an inner gear ring; a planetary gear is provided on the inner side of the planetary bracket, and the planetary gear and the sun gear are gear-connected; a planetary output wheel is fixedly provided on the outer side of the planetary bracket, the planetary output wheel and the output gear are gear-connected, the planetary output wheel and the planetary support shaft are bearing-connected, and the planetary support shaft and the sun gear are integrally formed.

[0008] Preferably, the planetary support and the inner gear ring on the inner wall of the housing are connected by helical teeth, and a thrust bearing is provided between the planetary support and the sun gear.

[0009] Preferably, the sensor structure comprises a torque sleeve sleeved on the central axis, a strain gauge is pasted on the torque sleeve, and the strain gauge is connected to the torque circuit board.

[0010] Preferably, the two ends of the torque sleeve are respectively provided with a connecting toothed disc and a ratchet ring, the ratchet ring and the torque sleeve are meshed through ratchets, and are slidably sleeved with the central shaft through teeth, a magnetic ring is arranged on the ratchet ring, and the isolator is sleeved on the torque sleeve.

[0011] Preferably, the torque circuit board is arranged at one end where the torque sleeve is connected to the ratchet ring, and a power supply board is fixedly arranged on the inner wall of the shell opposite to the torque circuit board, and the power supply board is connected to the controller.

[0012] Preferably, a dust cover is provided on the outer shell of the torque sleeve.

[0013] The beneficial effects of the present invention compared with the prior art are:

[0014] 1) The motor of the present invention has a large reduction ratio, a small size, and good integration with the entire vehicle.

[0015] 2) The present invention has a simple and sophisticated structure, can accurately control the start and stop of the motor, and has an obvious power-assisting effect.

[0016] 3) The overall structure of the present invention has high stability and low power consumption.

[0017] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional structural schematic diagram of a first preferred embodiment of the present invention;

[0019] Figure 2 It is a schematic cross-sectional structural diagram of a second preferred embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to more fully understand the technical content of the present invention, the technical solution of the present invention is further introduced and illustrated in conjunction with specific embodiments below.

[0021] like Figure 1 , Figure 2As shown, an intelligent mid-mounted motor includes a housing 1, a central shaft 2 and a planetary reduction structure 3 are arranged in the housing 1, the central shaft 2 and the planetary reduction structure 3 are connected through an output gear 4, the output gear 4 is sleeved on the central shaft 2 through a one-way device 5, a torque sensing structure 6 is arranged on the central shaft 2, and the torque sensing structure 6 is connected to a controller; the central shaft 2 and the planetary support shaft 31 of the planetary reduction structure 3 are arranged in parallel. The parallel arrangement of the central shaft 2 and the planetary support shaft 31 effectively reduces the size of the motor and has good integration with the whole vehicle. At the same time, the start and stop of the motor are accurately controlled, and the power-assisting effect is obvious.

[0022] Figure 1 As shown, it is a cross-sectional structural schematic diagram of the first preferred embodiment of the present invention, wherein the planetary reduction mechanism 3 includes a stator 32 fixedly connected to the housing 1, one end of the planetary support shaft 31 is fixed to the stator 32 or the housing 1, and the other end is fixed to the inner wall of the housing 1, and a rotor 33 is sleeved on the planetary support shaft 31; the rotor 33 is fixedly connected to the sun gear 34 sleeved on the planetary support shaft 31, and a planetary support shaft 31 is also sleeved with a planetary support shaft 35, and the planetary support shaft 35 is connected to the planetary support shaft 31 through a bearing, and is connected to the housing 1 through an inner gear ring 11; a planetary gear 36 is arranged inside the planetary support 35, and the planetary gear 36 and the sun gear 34 are gear-connected; a planetary output wheel 37 is fixedly arranged outside the planetary support 35, and the planetary output wheel 37 is gear-connected to the output gear 4, and the planetary output wheel 37 and the planetary support shaft 31 are bearing-connected. The rotor 33, the sun gear 34, the planetary gear 36, the planetary support 35, the planetary output wheel 37, and the output gear 4 are sequentially transmitted to complete the deceleration and boosting, and the structure is compact.

[0023] like Figure 2 As shown, it is a cross-sectional structural schematic diagram of the second preferred embodiment of the present invention, the planetary support shaft 31 is rotatably connected with the housing 1, the planetary support shaft 31 is fixedly provided with a rotor 33 and a sun gear 34, the planetary support shaft 31 is also sleeved with a planetary bracket 35, the planetary bracket 35 is connected with the planetary support shaft 31 through a bearing, and the housing 1 is provided with a stator 32; the planetary bracket 35 is connected with the planetary support shaft 31 through a bearing, and is connected with the housing 1 through an inner gear ring 11; the planetary gear 36 is arranged inside the planetary bracket 35, and the planetary gear 36 and the sun gear 34 are connected by gears; the planetary output wheel 37 is fixedly arranged outside the planetary bracket 35, the planetary output wheel 37 is connected with the output gear 4 by gears, the planetary output wheel 37 and the planetary support shaft 31 are connected by bearings, and the planetary support shaft 31 and the sun gear 34 are integrally formed. The planetary support shaft 31 is fixedly connected with the rotor 33 and the sun gear 34, and the power is output by the sun gear 34, and the power is transmitted in sequence between the planetary gear 36, the planetary bracket 35, the planetary output wheel 37, and the output gear 4 to complete the deceleration assistance, and the structure is compact.

[0024] Specifically, the planetary carrier 35 and the inner gear ring 11 on the inner wall of the housing 1 are connected by helical teeth, and a thrust bearing 38 is provided between the planetary carrier 35 and the sun gear 34 .

[0025] Specifically, the sensor structure 6 includes a torque sleeve 61 sleeved on the central axis 2 , a strain gauge is attached to the torque sleeve 61 , and the strain gauge is connected to the torque circuit board 65 .

[0026] Specifically, the two ends of the torque sleeve 61 are respectively provided with a connecting toothed disc 63 and a ratchet ring 64 . The ratchet ring 64 is meshed with the torque sleeve 61 through ratchet teeth and is slidably connected with the central shaft 2 through teeth. A magnetic ring is provided on the ratchet ring 64 , and the isolator 5 is sleeved on the torque sleeve 61 .

[0027] Specifically, the torque circuit board 65 is arranged at one end where the torque sleeve is connected to the ratchet ring, and a power supply board 66 is fixedly provided on the inner wall of the shell 1 opposite to the torque circuit board 65, and the power supply board 66 is connected to the controller.

[0028] Specifically, a dust cover 62 is disposed outside the torque sleeve 61 .

[0029] The working principle of the present invention is as follows:

[0030] When riding, a pedal force is applied to the pedal, which drives the chain through the toothed disc 63 and drives the middle shaft 2 to rotate. The middle shaft 2, the ratchet ring 64, and the torque sleeve 61 transmit power in sequence, the strain gauge generates strain, and the torque circuit board 65 transmits a signal to the power supply board 66. The power supply board transmits the detected torque data of the driving toothed disc 63 to the controller. The controller controls the motor rotor 33 to work according to the power-assisting conditions, and finally transmits power to the torque sleeve 61 and the toothed disc 63 through the output gear 4 and the one-way device 4 to complete the power-assisting. When the pedaling stops, the rotor 33 is still working, which will drive the torque sleeve 61 and the toothed disc 63 to rotate, but the ratchet ring 64 is disengaged from the torque sleeve 61, and the magnetic ring is fixed on the ratchet ring 64. The Hall on the power supply board 66 detects that the magnetic ring is not rotating, and the controller stops working and stops assisting. When the rotor 33 stops working or the power is off, the one-way device 4 is disengaged, and when the rotor 33 is working and driven, the one-way device 4 is engaged.

[0031] The above description is only used to further illustrate the technical content of the present invention by way of examples, so as to facilitate the readers' easier understanding, but it does not mean that the implementation mode of the present invention is limited to this. The local structure and connection method of each component can be adjusted according to the actual situation. Any technical extension or re-creation made according to the present invention is protected by the present invention.

Claims

1. An intelligent mid-mounted motor, comprising a housing, characterized in that: A central shaft and a planetary reduction structure are arranged in the shell, and the central shaft and the planetary reduction structure are connected through an output gear, and the output gear is sleeved on the central shaft through a one-way device, and a torque sensing structure is arranged on the central shaft, and the torque sensing structure is connected to a controller; the central shaft and the planetary support shaft of the planetary reduction structure are arranged in parallel; the torque sensing structure includes a torque sleeve sleeved on the central shaft, and a strain gauge is pasted on the torque sleeve, and the strain gauge is connected to a torque circuit board; a connecting tooth plate and a ratchet ring are respectively provided at both ends of the torque sleeve, the ratchet ring and the torque sleeve are meshed through ratchets, and are slidably sleeved with the central shaft through teeth, a magnetic ring is arranged on the ratchet ring, and the one-way device is sleeved on the torque sleeve; the torque circuit board is arranged at one end of the torque sleeve connected to the ratchet ring, and a power supply board is fixedly provided on the inner wall of the shell opposite to the torque circuit board, and the power supply board is connected to the controller; a Hall is provided on the power supply board for detecting whether the magnetic ring is rotating, and when the Hall detects that the magnetic ring is not rotating, the controller stops working and stops assisting.

2. The intelligent mid-mounted motor according to claim 1, characterized in that: The planetary reduction structure includes a stator fixedly connected to the housing, one end of the planetary support shaft is fixed to the stator or the housing, and the other end is fixed to the inner wall of the housing, and a rotor is sleeved on the planetary support shaft; the rotor is fixedly connected to the sun gear sleeved on the planetary support shaft, and a planetary support shaft is also sleeved on the planetary support shaft, and the planetary support shaft is connected to the planetary support shaft through a bearing and to the housing through an inner gear ring; a planetary gear is arranged on the inner side of the planetary support, and the planetary gear and the sun gear are gear-connected; a planetary output wheel is fixedly arranged on the outer side of the planetary support, and the planetary output wheel and the output gear are gear-connected, and the planetary output wheel and the planetary support shaft are bearing-connected.

3. The intelligent mid-mounted motor according to claim 1, characterized in that: The planetary support shaft is rotatably connected to the shell, a rotor and a sun gear are fixedly provided on the planetary support shaft, a planetary bracket is also sleeved on the planetary support shaft, the planetary bracket is connected to the planetary support shaft by a bearing, and a stator is provided on the shell; the planetary bracket is connected to the planetary support shaft by a bearing, and is connected to the shell by an inner gear ring; a planetary gear is provided on the inner side of the planetary bracket, and the planetary gear and the sun gear are gear-connected; a planetary output wheel is fixedly provided on the outer side of the planetary bracket, the planetary output wheel and the output gear are gear-connected, the planetary output wheel and the planetary support shaft are bearing-connected, and the planetary support shaft and the sun gear are integrally formed.

4. The intelligent mid-mounted motor according to any one of claims 2 and 3, characterized in that: The planetary support and the inner gear ring on the inner wall of the housing are connected by helical teeth, and a thrust bearing is arranged between the planetary support and the sun gear.

5. The intelligent mid-mounted motor according to claim 4, characterized in that: The torque sleeve is outerly provided with a dust cover.

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