CN112078715A - Intelligent central motor - Google Patents

Abstract

The invention discloses an intelligent mid-mounted motor, comprising a casing, wherein a central shaft and a planetary deceleration structure are arranged in the casing, and the central shaft and the planetary deceleration structure are connected by an output gear, and the output gear is sleeved in the middle through a one-way device A torsion sensing structure is arranged on the shaft and the central shaft, and the torsional sensing structure is connected with the controller; the central shaft and the planetary support shaft of the planetary deceleration structure are arranged in parallel. The motor of the invention has a large reduction ratio, a small volume of the motor, and good integration with the whole vehicle.

Description

Smart Mid Motor

technical field

The invention relates to the field of electric bicycles, in particular to an intelligent mid-mounted motor.

Background technique

With the enhancement of people's awareness of environmental protection, electric bicycles with high efficiency and energy saving are more and more favored by people, and people have higher and higher requirements for the experience of electric power assistance of existing bicycles. The reduction ratio of the booster motor is small, the volume of the motor is large, and the integration with the vehicle is poor.

SUMMARY OF THE INVENTION

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

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

An intelligent mid-mounted motor includes a casing, a central shaft and a planetary reduction structure are arranged in the casing, the central shaft and the planetary reduction structure are connected by an output gear, and the output gear is sleeved on the central shaft through a one-way device, and the central shaft and the planetary reduction structure are connected by an output gear. A torsion sensing structure is arranged on the shaft, and the torsion sensing structure is connected with the controller; the central shaft and the planetary support shaft of the planetary deceleration structure are arranged in parallel.

Preferably, the planetary deceleration mechanism includes a stator fixedly connected to the casing, one end of the planetary support shaft is fixed on the stator or the casing, the other end is fixed on the inner wall of the casing, and the rotor is sleeved on the planetary support shaft; The rotor is fixedly connected with the sun gear sleeved on the planetary support shaft, and the planetary support shaft is also sleeved with a planetary bracket, the planetary bracket is connected with the planetary support shaft through a bearing, and is connected with the shell through an inner gear ring The inner side of the planet carrier is provided with a planetary gear, and the planetary gear and the sun gear are connected by gears; the outer side of the planetary carrier is fixed with a planetary output wheel, and the planetary output wheel is connected with the output gear by a gear, and the planetary output wheel and the planetary support Bearing connection between shafts.

Preferably, the planetary support shaft is rotatably connected with the housing, the rotor and the sun gear are fixed on the planetary support shaft, the planetary support shaft is also sleeved with a planetary support, the planetary support and the planetary support shaft are connected by a bearing, and the housing A stator is arranged on it; the planet carrier is connected with the planet support shaft through a bearing, and is connected with the housing through an internal gear ring; the inner side of the planet carrier is provided with a planet gear, and the planet gear and the sun gear are connected by gears; A planetary output wheel is fixed on the outer side of the planetary support, the planetary output wheel and the output gear are connected by gears, the planetary output wheel and the planetary support shaft are connected by a bearing, and the planetary support shaft and the sun gear are integrally formed.

Preferably, the planet carrier and the ring gear on the inner wall of the housing are connected by helical gears, and a thrust bearing is provided between the planet carrier and the sun gear.

Preferably, the sensor structure includes a torsion sleeve sleeved on the central shaft, a strain gauge is pasted on the torsion sleeve, and the strain gauge is connected to the torque circuit board.

Preferably, the two ends of the torsion sleeve are respectively provided with a connecting tooth plate and a ratchet ring, the ratchet ring and the torsion sleeve are meshed with the ratchet teeth, and are slidably sleeved with the central shaft through the teeth, and a magnetic ring is arranged on the ratchet ring. The one-way device is sleeved on the torque sleeve.

Preferably, the torque circuit board is provided at the end where the torque sleeve is connected to the ratchet ring, and a power supply board is fixed on the inner wall of the housing opposite to the torque circuit board, and the power supply board is connected to the controller.

Preferably, the torsion jacket is provided with a dust cover.

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

1) The reduction ratio of the motor of the present invention is large, the volume of the motor is small, and the integration with the whole vehicle is good.

2) The structure of the present invention is simple and exquisite, and the start and stop of the motor are precisely controlled, and the boosting effect is obvious.

3) The coordination structure of the whole machine of the present invention has high stability and low power consumption.

The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the first preferred embodiment of the present invention;

FIG. 2 is a schematic cross-sectional structural diagram of a second preferred embodiment of the present invention.

Detailed ways

In order to more fully understand the technical content of the present invention, the technical solutions of the present invention are further introduced and described below with reference to specific embodiments.

As shown in Figures 1 and 2, an intelligent mid-mounted motor includes a casing 1. The casing 1 is provided with a central shaft 2 and a planetary deceleration structure 3. The central shaft 2 and the planetary deceleration structure 3 are connected through an output gear 4, and the output The gear 4 is sleeved on the central shaft 2 through the one-way device 5, and the central shaft 2 is provided with a torsion sensing structure 6, which is connected with the controller; the central shaft 2 is parallel to the planetary support shaft 31 of the planetary deceleration structure 3 set up. The parallel arrangement of the central shaft 2 and the planetary support shaft 31 effectively reduces the volume of the motor and has good integration with the vehicle. At the same time, the startup and shutdown of the motor are precisely controlled, and the boosting effect is obvious.

1 is a schematic cross-sectional view of the first preferred embodiment of the present invention. The planetary reduction mechanism 3 includes a stator 32 fixedly connected to the housing 1, and one end of the planetary support shaft 31 is fixed on the stator 32 or the housing 1. The other end is fixed on the inner wall of the housing 1 , a rotor 33 is sleeved on the planetary support shaft 31 ; the rotor 33 is fixedly connected with the sun gear 34 sleeved on the planetary support shaft 31 , and a planetary support 35 is also sleeved on the planetary support shaft 31 , the planet carrier 35 is connected with the planetary support shaft 31 through a bearing, and is connected with the housing 1 through the ring gear 11; the inner side of the planet carrier 35 is provided with a planetary gear 36, and the gear connection between the planetary gear 36 and the sun gear 34 ; The outer side of the planetary support 35 is fixed with a planetary output wheel 37, the planetary output wheel 37 and the output gear 4 are connected by gears, and the planetary output wheel 37 and the planetary support shaft 31 are connected by bearings. 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 transmit power in sequence and complete the deceleration assist, and the structure is compact.

As shown in FIG. 2 , which is a schematic cross-sectional view of the second preferred embodiment of the present invention, the planetary support shaft 31 is rotatably connected to the housing 1 , the planetary support shaft 31 is fixedly provided with a rotor 33 and a sun gear 34 , and the planetary support shaft 31 The planet carrier 35 is also sleeved, and the planet carrier 35 and the planet support shaft 31 are connected by bearings, and the housing 1 is provided with a stator 32; the planet carrier 35 and the planet support shaft 31 are connected by bearings, and are They are connected by the ring gear 11; the inner side of the planetary support 35 is provided with a planetary gear 36, and the gear connection between the planetary gear 36 and the sun gear 34; There is a gear connection between them, a bearing connection between the planetary output wheel 37 and the planetary support shaft 31 , 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 sequentially transmitted among the planetary gear 36, the planetary support 35, the planetary output wheel 37, and the output gear 4, and the deceleration assist is completed, and the structure is compact. .

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

Specifically, the sensor structure 6 includes a torsion sleeve 61 sleeved on the central shaft 2 , a strain gauge is pasted on the torsion sleeve 61 , and the strain gauge is connected to the torque circuit board 65 .

Specifically, the two ends of the torsion sleeve 61 are respectively provided with a connecting tooth plate 63 and a ratchet ring 64. The ratchet ring 64 and the torsion sleeve 61 are engaged with the ratchet teeth, and are slidably connected with the central shaft 2 through the teeth. The ratchet ring 64 is provided with The magnetic ring, the one-way device 5 is sleeved on the torque sleeve 61 .

Specifically, the torque circuit board 65 is provided at the end where the torque sleeve and the ratchet ring are connected, and a power supply board 66 is fixed on the inner wall of the housing 1 opposite to the torque circuit board 65 , and the power supply board 66 is connected to the controller.

Specifically, a dust cover 62 is provided outside the torque sleeve 61 .

The working principle of the present invention is as follows:

When riding, the pedal force is applied to the pedal, the pedal drives the chain through the crankset 63 and drives the central axle 2 to rotate, the central axle 2, the ratchet ring 64 and the torsion sleeve 61 transmit power in turn, the strain gauge generates strain, and the torque circuit board 65 transmits the signal to the power supply board 66, the power supply board transmits the detected torque data of the drive crankset 63 to the controller, the controller controls the motor rotor 33 to work according to the boost condition, and finally transmits the power to the torque through the output gear 4 and the unidirectional device 4 Set 61 and crankset 63 to complete the boost. When the pedaling is stopped, the rotor 33 is still working, which will drive the twist sleeve 61 and the crankset 63 to rotate, but the ratchet ring 64 is disengaged from the torque sleeve 61, the magnetic ring is fixed on the ratchet ring 64, and the hoops on the power supply plate 66 Er detects that the magnetic ring is not rotating, the controller stops working and stops assisting. When the rotor 33 stops working or is powered off for riding, the one-way device 4 is disengaged, and when the rotor 33 works and drives, the one-way device 4 is engaged.

The above is only to further illustrate the technical content of the present invention with examples, so as to facilitate the readers to understand more easily, but it does not mean that the embodiments of the present invention are limited to this, and the local structure and connection mode of each component can be changed according to the actual situation. Adjustments, any technical extensions or re-creations made according to the present invention are protected by the present invention.

Claims (8)

1. An intelligent centrally-mounted motor comprises a shell, and is characterized in that a middle shaft and a planetary reduction structure are arranged in the shell, the middle shaft and the planetary reduction structure are connected through an output gear, the output gear is sleeved on the middle shaft through an isolator, a torsion sensing structure is arranged on the middle shaft, and the torsion sensing structure is connected with a controller; the middle shaft and the planet support shaft of the planet speed reducing structure are arranged in parallel.

2. The intelligent centrally-mounted motor according to claim 1, wherein the planetary reduction mechanism comprises a stator fixedly connected with the housing, one end of the planetary support shaft is fixed on the stator or the housing, the other end of the planetary support shaft is fixed on the inner wall of the housing, and the rotor is sleeved on the planetary support shaft; the rotor is fixedly connected with a sun gear sleeved on the planet supporting shaft, the planet supporting shaft is also sleeved with a planet support, and the planet support is connected with the planet supporting shaft through a bearing and is connected with the shell through an inner gear ring; the inner side of the planet carrier is provided with a planet gear, and the planet gear is in gear connection with the sun gear; and a planet output wheel is fixedly arranged on the outer side of the planet support, the planet output wheel is in gear connection with the output gear, and the planet output wheel is in bearing connection with the planet support shaft.

3. The intelligent centrally-mounted motor according to claim 1, wherein the planet support shaft is rotatably connected with a housing, a rotor and a sun gear are fixedly arranged on the planet support shaft, a planet support is further sleeved on the planet support shaft, the planet support is connected with the planet support shaft through a bearing, and a stator is arranged on the housing; the planet support is connected with the planet support shaft through a bearing and is connected with the shell through an inner gear ring; the inner side of the planet carrier is provided with a planet gear, and the planet gear is in gear connection with the sun gear; the planetary output wheel is fixedly arranged on the outer side of the planetary support, the planetary output wheel is in gear connection with the output gear, the planetary output wheel is in bearing connection with the planetary support shaft, and the planetary support shaft and the sun gear are integrally formed.

4. The intelligent centrally-mounted motor according to any one of claims 2 and 3, characterized in that the planet carrier and the inner gear ring on the inner wall of the shell are in inclined tooth connection, and a thrust bearing is arranged between the planet carrier and the sun gear.

5. The intelligent centrally-mounted motor according to claim 1, wherein the sensor structure comprises a torsion sleeve sleeved on the center shaft, a strain gauge is adhered on the torsion sleeve, and the strain gauge is connected with the torque circuit board.

6. The intelligent centrally-mounted motor according to claim 5, wherein the two ends of the torque sleeve are respectively provided with a connecting toothed disc and a ratchet ring gear, the ratchet ring gear and the torque sleeve are engaged through a ratchet and are slidably sleeved with the center shaft through teeth, the ratchet ring is provided with a magnetic ring, and the isolator is sleeved on the torque sleeve.

7. The intelligent centrally-mounted motor according to claim 6, wherein the torque circuit board is arranged at one end of the torque sleeve connected with the ratchet ring, 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 with the controller.

8. The intelligent mid-motor set as recited in claim 5, wherein a dust hood is sleeved outside the torsion sleeve.

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