CN213831995U - Motor speed reduction output mechanism and middle motor - Google Patents

Abstract

The utility model discloses a motor speed reduction output mechanism and a middle motor, which relate to the field of motors, and the technical scheme is characterized in that the motor speed reduction output mechanism comprises a motor and a planetary speed reduction assembly, wherein the planetary speed reduction assembly comprises a planetary gear, an output gear ring and a sun gear connected with the motor; the planet wheel comprises an input planet wheel meshed with the sun wheel and an output planet wheel meshed with the gear ring, and the input planet wheel and the output planet wheel are linked along the circumferential direction. The utility model discloses have and to realize the advantage of higher reduction ratio in limited plane space.

Description

Motor speed reduction output mechanism and middle motor

Technical Field

The utility model relates to a motor field, more specifically say, it relates to a motor speed reduction output mechanism reaches and puts motor in.

Background

A motor arranged in an existing power-assisted bicycle is a speed reduction motor with a motor and a speed reducer, and power-assisted output is achieved.

The prior Chinese patent with the publication number of CN104953759B discloses a middle motor with a variable reduction ratio for an electric bicycle, which comprises a shell, a motor, a first-stage pinion, a first-stage gearwheel, a second-stage pinion, a second-stage gearwheel and a power output sleeve, wherein the first-stage pinion is meshed with the first-stage gearwheel, and the second-stage pinion coaxial with the first-stage gearwheel is meshed with the second-stage gearwheel.

The first-level pinion, the first-level gearwheel and the second-level pinion in the middle motor form a reducer of the motor, and speed reduction output is realized. The reduction ratio that the above-mentioned reduction gear can reach is limited by the structure, if need realize higher reduction ratio, the reduction gear structure in above-mentioned mid motor then can't satisfy the requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a motor speed reduction output mechanism, it has the advantage that can realize higher reduction ratio in limited plane space.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a motor speed reduction output mechanism comprises a motor and a planetary speed reduction assembly, wherein the planetary speed reduction assembly comprises a planetary wheel, an output gear ring and a sun wheel connected with the motor; the planet wheel comprises an input planet wheel meshed with the sun wheel and an output planet wheel meshed with the gear ring, and the input planet wheel and the output planet wheel are linked along the circumferential direction.

Further, the motor includes the motor shaft, sun gear set up in on the motor shaft, and both are integrated into one piece.

Further, the input planet wheel is a nylon gear.

Further, the input planet wheel and the output planet wheel are integrally formed.

Furthermore, the planetary reduction assembly also comprises a planet carrier, the planet carrier comprises two end plates, and a planet shaft penetrating through the planet wheel is arranged between the two end plates; a rolling bearing is arranged between the planet shaft and the planet wheel, and a plane bearing is arranged between the planet wheel and the end plate.

Further, the output gear ring comprises an end wall, an axial extension section is arranged on the end wall along the direction far away from the planet wheel, and an output unit is arranged on the axial extension section.

Further, the output unit is a gear, a synchronous pulley or a sprocket.

Further, the planet speed reduction subassembly still includes the planet carrier, the motor includes the motor shaft, be provided with the speed measuring subassembly between motor shaft and the planet carrier.

Further, the speed measuring component is in including setting up the mount pad of motor shaft tip, the embedded rotary transformer magnet steel that is equipped with of mount pad, be provided with on the planet carrier with the relative rotary transformer control panel of rotary transformer magnet steel.

Another object of the present invention is to provide an intermediate motor, which includes the above motor deceleration output mechanism.

To sum up, the utility model discloses following beneficial effect has:

1. the planetary speed reduction assembly realizes high speed reduction ratio on one shaft, and the plane space of the motor speed reduction output mechanism is effectively reduced;

2. the noise of the motor output at high rotating speed can be reduced by adopting the nylon gear;

3. the bicycle power-assisted driving system adopting the motor speed reduction output mechanism can bring better riding experience for riders.

Drawings

Fig. 1 is a schematic view of the entire structure of a motor reduction output mechanism in embodiment 1;

FIG. 2 is a schematic view showing a partial component structure of a motor reduction output mechanism according to embodiment 1;

fig. 3 is a sectional view of the planetary gear in embodiment 1;

FIG. 4 is a schematic structural view of a ring gear in embodiment 1;

fig. 5 is a schematic structural view of the motor in embodiment 1.

In the figure: 1. a motor; 11. a motor shaft; 12. a sun gear; 13. a mounting seat; 14. rotating the variable magnetic steel; 2. a planet carrier; 21. a planet shaft; 3. a planet wheel; 31. an input planet wheel; 32. an output planet wheel; 33. a limit convex ring; 4. an output ring gear; 41. internal teeth; 42. an axially extending section; 43. an output unit; 44. a yielding groove; 5. a rotary transformer control panel; 6. a rolling bearing; 7. and a plane bearing.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Example 1:

a motor speed reduction output mechanism, referring to fig. 1 to 5, includes a motor 1 and a planetary speed reduction assembly, the motor 1 includes a motor shaft 11, the planetary speed reduction assembly includes a planet carrier 2, a plurality of planet gears 3, an output gear ring 4 and a sun gear 12 arranged on the motor shaft 11, in this embodiment, the number of the planet gears 3 is three; wherein the planet wheels 3 comprise an input planet wheel 31 engaged with the sun wheel 12 and an output planet wheel 32 engaged with the output ring gear 4, and the inner side wall of the output ring gear 4 is provided with inner teeth 41 engaged with the output planet wheel 32.

Referring to fig. 1, the output ring gear 4 is provided with an output unit 43, in this embodiment, the output ring gear 4 includes an end wall, the end wall is provided with an axial extension section 42 along a direction away from the planet wheel 3, and the output unit 43 is provided on the axial extension section 42; the output unit 43 may be a gear, a timing pulley or a sprocket, and the output unit 43 is a gear in this embodiment.

Referring to fig. 1 to 5, the rotating speed of the motor shaft 11 is output to the output unit 43 through the sun gear 12, the input planet gear 31, the output planet gear 32 and the output ring gear 4, in this embodiment, the number of teeth of the sun gear 12 is 6, the number of teeth of the input planet gear 31 is 30, the number of teeth of the output planet gear 32 is 18, the number of teeth of the internal tooth 41 is 51, and the number of teeth of the output unit 43 is 17, so that a higher reduction ratio can be realized in a limited planar space, and design requirements are met.

Referring to fig. 2, 3 and 5, the sun gear 12 is integrally formed with the motor shaft 11 in the present embodiment, so that the number of parts and assembly processes can be reduced and stability can be improved; in the embodiment, the input planet wheel 31 and the output planet wheel 32 are integrally formed to form the planet wheel 3, so that the synchronous rotation of the input planet wheel and the output planet wheel along the circumferential direction can be realized; the input planet wheel 31 and the output planet wheel 32 are arranged to effectively reduce the stress of a single tooth, and the planet wheel 3 in the embodiment can be a nylon gear, so that the noise can be reduced; in the present embodiment, the input planet gear 31 and the sun gear 12 are both helical gears, so that noise can be further reduced.

With reference to fig. 2 and 3, the planet carrier 2 comprises two end plates between which a planet shaft 21 is arranged, which passes through the planet wheels 3; a rolling bearing 6 is arranged between the planet shaft 21 and the planet wheel 3, and a plane bearing 7 is arranged between the planet wheel 3 and the end plate; in the embodiment, two rolling bearings 6 are arranged between the planet shaft 21 and the planet wheel 3, and a limiting convex ring 33 positioned between the two rolling bearings 6 is arranged on the inner side wall of the planet wheel 3; in the present embodiment, the end face of the input planetary gear 31 is embedded with the flat bearing 7 contacting with one end plate thereof, while the other end plate is provided with a convex ring (not shown in the drawings) abutting against the inner ring of the rolling bearing 6, so that the axial positioning of the planetary gear 3 can be ensured.

Referring to fig. 1, 2, 4 and 5, a speed measuring assembly is arranged between a motor shaft 11 and a planet carrier 2, the speed measuring assembly in this embodiment includes a mounting base 13 arranged at an end portion of the motor shaft 11, a rotation variable magnetic steel 14 is embedded in the mounting base 13, a rotation variable control plate 5 opposite to the rotation variable magnetic steel 14 is arranged on an end plate of the planet carrier 2, and an end wall of an output gear ring 4 in this embodiment extends into an axial extension section 42 to form a relief groove 44 matched with the rotation variable control plate 5, so that an axial size can be reduced; the rotary transformer magnetic steel 14 and the rotary transformer control panel 5 are matched to measure the rotating speed of the motor shaft 11, and other devices can be adopted to realize the speed measuring function.

Example 2:

a middle motor comprises the motor speed reduction output mechanism in the embodiment 1, the middle motor is used for being installed on a bicycle, electric energy is converted into mechanical energy, and power is output to enable the bicycle to move forward, so that a rider can save labor.

Claims (10)

1. The utility model provides a motor speed reduction output mechanism which characterized in that: the planetary reduction gear comprises a motor and a planetary reduction assembly, wherein the planetary reduction assembly comprises a planetary gear, an output gear ring and a sun gear connected with the motor; the planet wheel comprises an input planet wheel meshed with the sun wheel and an output planet wheel meshed with the output gear ring, and the input planet wheel and the output planet wheel are linked along the circumferential direction.

2. The motor deceleration output mechanism according to claim 1, characterized in that: the motor comprises a motor shaft, the sun gear is arranged on the motor shaft, and the sun gear and the motor shaft are integrally formed.

3. The motor deceleration output mechanism according to claim 1, characterized in that: the input planet wheel is a nylon gear.

4. The motor deceleration output mechanism according to claim 1, characterized in that: the input planet wheel and the output planet wheel are integrally formed.

5. The motor deceleration output mechanism according to claim 4, characterized in that: the planet speed reducing assembly also comprises a planet carrier, the planet carrier comprises two end plates, and a planet shaft penetrating through the planet wheel is arranged between the two end plates; a rolling bearing is arranged between the planet shaft and the planet wheel, and a plane bearing is arranged between the planet wheel and the end plate.

6. The motor deceleration output mechanism according to claim 1, characterized in that: the output gear ring comprises an end wall, an axial extension section is arranged on the end wall along the direction far away from the planet wheel, and an output unit is arranged on the axial extension section.

7. The motor deceleration output mechanism according to claim 6, characterized in that: the output unit is a gear, a synchronous belt wheel or a chain wheel.

8. The motor deceleration output mechanism according to claim 1, characterized in that: the planetary reduction assembly further comprises a planet carrier, the motor comprises a motor shaft, and a speed measuring assembly is arranged between the motor shaft and the planet carrier.

9. The motor deceleration output mechanism according to claim 8, characterized in that: the speed measuring assembly comprises a mounting seat arranged at the end part of the motor shaft, a rotary transformer magnetic steel is embedded in the mounting seat, and a rotary transformer control panel opposite to the rotary transformer magnetic steel is arranged on the planet carrier.

10. A centrally-mounted motor is characterized in that: a motor speed reduction output structure comprising the motor of any one of claims 1-8.

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