CN212028439U - Double-speed wheel hub motor for small agricultural machine - Google Patents

Abstract

The utility model relates to a double-speed wheel hub motor for small agricultural machinery, which comprises a wheel hub, a power mechanism, a main shaft, a primary speed reducing mechanism and a secondary speed reducing mechanism, wherein the primary speed reducing mechanism comprises a primary central gear and a plurality of primary planet gears which are in transmission fit, one-level ring gear, the one-level planet carrier, one-level sun gear and power unit transmission cooperation, the one-level ring gear is fixed to be set up at the wheel hub inner wall, drive wheel hub by the one-level ring gear and rotate, second grade reduction gears includes transmission complex second grade sun gear, a plurality of second grade planet wheels, the second grade ring gear, the second grade planet carrier, the fixed setting of second grade ring gear is at the wheel hub inner wall, wheel hub setting is stretched out to the front end of main shaft, the middle part of main shaft links to each other with the middle part of second grade planet carrier is fixed, the center of one-level planet carrier and main shaft are through bearing normal.

Description

Double-speed wheel hub motor for small agricultural machine

Technical Field

The utility model relates to an agricultural mechanical equipment technical field, especially a small-size double speed in-wheel motor for agricultural machinery.

Background

The small farming machine has small volume and compact structure, and can not adopt a special reduction gearbox and a transmission mechanism which are arranged in the common machine, and generally adopts 2 hub motors. The walking distance is small in field operation, several kilometers per hour, but enough torque is needed for tillage or seeding, so that the low-rotating-speed and high-torque are needed, a certain running speed is needed when the tillage machine walks on a road, the diameter of a hub motor is limited due to the miniaturization of the tillage machine, the output torque of a common hub motor is limited, the output characteristic is poor in a low-speed state, the efficiency is low, the diameter of a tire cannot be large, and the requirement of the farming machine on the motor cannot be met.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a small-size agricultural machinery double speed in-wheel motor that simple structure, operation are stable, possess different rotational speed ability.

In order to solve the technical problem, the utility model provides a double-speed wheel hub motor for small agricultural machinery, which comprises a wheel hub, a power mechanism, a main shaft, a primary speed reducing mechanism and a secondary speed reducing mechanism,

the primary speed reducing mechanism comprises a primary central gear, a plurality of primary planet gears, a primary gear ring and a primary planet carrier which are in transmission fit, the primary central gear is in transmission fit with the power mechanism, the primary gear ring is fixedly arranged on the inner wall of the hub and drives the hub to rotate through the primary gear ring,

the secondary speed reducing mechanism comprises a secondary central gear, a plurality of secondary planet gears, a secondary gear ring and a secondary planet carrier which are in transmission fit, the secondary gear ring is fixedly arranged on the inner wall of the hub,

the front end of main shaft stretches out the wheel hub setting, and the middle part of main shaft and the middle part of second grade planet carrier are fixed to be linked to each other, and the center and the main shaft of one-level planet carrier are through bearing normal running fit, through clutch transmission cooperation between one-level planet carrier and the second grade sun gear to make clutch between one-level planet carrier and the second grade sun gear drive the wheel hub and rotate after the speed reduction of power unit through one-level reduction gears, second grade reduction gears when being in the linkage state, drive the wheel hub and rotate after the speed reduction of power unit through one-level reduction gears when clutch between one-level planet carrier and the second grade sun gear is in the disengagement state, drive second grade ring gear, second grade planet wheel, second grade.

Further, the clutch device comprises a clutch seat, a movable armature and an armature post, one side of the clutch seat is fixedly connected with the primary planet carrier, the other side of the clutch seat is provided with a plurality of clutch transmission teeth along the axial direction in a protruding manner, each clutch transmission tooth is uniformly distributed on the same circumference, the secondary central gear comprises a gear disc and a gear sleeve which are integrally formed, one side of the gear disc is provided with a plurality of secondary transmission teeth along the axial direction in a protruding manner, each secondary transmission tooth is uniformly distributed on the same circumference so as to form a transmission groove matched with the clutch transmission teeth between two adjacent secondary transmission teeth, the edge of the gear disc is fixedly provided with the movable armature, the movable armature is provided with a plurality of guide posts, the primary planet carrier is provided with a countersunk hole matched with the guide posts, a reset spring sleeved with the guide posts is arranged in the countersunk hole, the secondary planet carrier is provided with a plurality of armature posts along the axial direction in a protruding manner, each armature post is arranged between the gaps of the adjacent secondary planet gears, the end part of each armature post extends out of the end surface of the secondary planet gear and a gap is reserved between the armature post and the movable armature, an electromagnet is arranged in each armature post, when the electromagnet is powered off, the movable armature is tightly attached to the primary planet carrier under the action of a reset spring, so that clutch transmission teeth on the clutch base are wedged with transmission grooves on a gear disc, the primary planet carrier is in transmission fit with the secondary central gear through the clutch base, the primary planet carrier is used as the input of the secondary speed reducing mechanism, the secondary gear ring is used as the output end of the secondary speed reducing mechanism to drive the hub to rotate, and the primary shaft is driven to rotate by the secondary planet carrier; when the electromagnet is electrified, magnetism is generated to adsorb the movable armature to move axially along the spindle, the reset spring is compressed, the movable armature drives the secondary central gear to move so that a clutch transmission gear on the clutch seat is separated from a transmission groove on the gear disc, the movable armature is adsorbed and fixed with the armature post, the secondary central gear is separated from being meshed with the secondary planet gear, the primary gear ring drives the hub to rotate, and the hub drives the secondary central gear and the secondary planet gear to idle.

Furthermore, the power mechanism comprises a stator assembly consisting of a stator coil, a stator support and a stator core, the stator support is fixedly connected with the inner wall of the hub, the power mechanism also comprises a rotor assembly consisting of a rotor magnetic ring and a rotor support, the first-stage central gear is fixedly connected with the rotor support, the rotor assembly is matched with the stator assembly so that the stator core can drive the rotor support to rotate after being electrified, and the rotor support drives the first-stage central gear to rotate.

Furthermore, 3 first-stage planet wheels are arranged between the first-stage gear ring and the first-stage central gear, two sides of each first-stage planet wheel are respectively meshed with the first-stage gear ring and the first-stage central gear, the center of each first-stage planet wheel is in rolling connection with a planet post on the first-stage planet carrier through a bearing, and the first-stage planet carrier is in transmission fit with the main shaft through the bearing.

Furthermore, 3 secondary planet wheels are arranged between the secondary gear ring and the secondary sun gear, two sides of each secondary planet wheel are respectively meshed with the secondary gear ring and the secondary sun gear, the center of each secondary planet wheel is in rolling connection with a planet column on the secondary planet carrier through a bearing, and the center of the secondary planet carrier is tightly and fixedly connected with the main shaft.

Furthermore, the double-speed wheel hub motor for the small agricultural machine further comprises a front end cover and a rear end cover, through holes suitable for the main shaft to pass through are formed in the centers of the stator support and the rotor support, so that the tail end of the main shaft is in rotating fit with the center of the rear end cover through a rear end cover bearing, and the front end of the main shaft passes through the front end cover and is in rotating fit with the center of the front end cover through the front end cover bearing.

The working method of the double-speed wheel hub motor for the small agricultural machine comprises the following steps:

A. the road surface high-speed driving state: the stator coil and the electromagnet are electrified, the armature post generates magnetism to adsorb the movable armature to move axially along the main shaft, the reset spring is compressed, the movable armature drives the secondary central gear to move so as to enable a clutch transmission gear on the clutch seat to be separated from a transmission groove on the gear disc, the movable armature and the armature post are adsorbed and fixed, the secondary central gear is separated from being meshed with the primary planet carrier, the rotor assembly drives the primary central gear to rotate, the primary central gear drives the primary planet gear to rotate, the primary planet gear drives the primary gear ring and the hub to rotate, the secondary gear ring and the hub synchronously rotate, and the secondary gear ring drives the secondary planet gear and the secondary central gear to synchronously idle;

B. and (3) low-speed operation state in the field: the stator coil is electrified, the electromagnet is powered off, the movable armature is tightly attached to the primary planet carrier under the action of the reset spring, the clutch transmission teeth on the clutch seat are wedged with the transmission grooves on the gear disc, the secondary central gear is meshed with the secondary planet gear, the stator assembly drives the rotor assembly to rotate, the rotor assembly drives the primary central gear to rotate, the primary central gear drives the primary planet gear, the primary planet carrier and the clutch seat to rotate, the primary planet carrier drives the secondary central gear to rotate through the clutch seat, the secondary central gear drives the secondary planet gear to rotate, the secondary planet gear drives the secondary gear ring, the secondary gear ring is used as the output end of the secondary speed reduction mechanism to drive the hub to rotate, and secondary speed reduction is realized.

The technical effects of the utility model are that: (1) compared with the prior art, the double-speed wheel hub motor for the small agricultural machine of the utility model, the armature post and the electromagnet are arranged on the secondary planet carrier, so that the clutch seat and the movable armature can be directly adsorbed on the secondary planet carrier after the electromagnet is electrified, the power input is not provided for the secondary central gear, the primary planet carrier does not rotate any more by moving the armature guide post, the primary planet gear and the primary gear ring directly carry out primary speed reduction transmission on the wheel hub, the requirement of high-speed walking of small farming machinery on a road is met, after the electromagnet is powered off, the movable armature and the clutch seat are directly attached to an armature post of the second-stage planet carrier, the second-stage central gear is wedged with the clutch seat, the first-stage planet carrier inputs power to the second-stage central gear, and the power of the power mechanism is transmitted to the second-stage gear ring through the two-stage speed reducing mechanism to drive the hub to rotate at a low speed so as to meet the requirement of field operation of small farming machinery; (2) the arrangement of the bearing between the main shaft and the primary planet carrier avoids the interference of the primary planet carrier on the main shaft when idling; (3) the clutch seat and the movable armature provide reset elastic force by the guide post, the counter bore and the reset spring, and the clutch seat and the movable armature are simple in structure and easy to realize.

Drawings

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

FIG. 1 is a schematic structural view of a double-speed wheel hub motor for a small farm machine according to the present invention;

FIG. 2 is a schematic cross-sectional view of a double-speed wheel hub motor for a small farm machine according to the present invention;

FIG. 3 is a schematic cross-sectional view of the inside of the double-speed wheel hub motor for the small agricultural machine of the utility model;

FIG. 4 is a schematic plan view of a primary sun gear, a primary planet gear, and a primary planet carrier;

FIG. 5 is a schematic structural diagram of a two-stage planet carrier;

FIG. 6 is a cross-sectional schematic view of a two-stage planet carrier;

FIG. 7 is a schematic plan view of the clutch seat;

FIG. 8 is a cross-sectional view of the clutch seat;

FIG. 9 is a schematic cross-sectional view of a two-stage sun gear;

fig. 10 is a plan view of the two-stage sun gear.

In the figure:

the magnetic clutch comprises a hub 1, a rotor magnetic ring 2, a rotor support 3, a stator coil 4, a stator support 5, a stator core 6, a primary sun gear 7, a primary planet wheel 8, a primary planet carrier 9, a primary ring gear 10, a secondary sun gear 11, a secondary planet wheel 12, a secondary planet carrier 13, a secondary ring gear 14, a clutch seat 15, a movable armature 16, an armature post 17, an electromagnet 18, a planet post 19, a guide post 20, a rear end cover 21, a front end cover 22, a return spring 23, a rear end cover bearing 24, a front end cover bearing 25, a bearing 26, a main shaft mounting square hole 27, a planet post mounting hole 28, a connecting pin 29, a main shaft 30, a clutch seat central hole 34, a clutch transmission tooth 35, a clutch seat mounting hole 36, a gear sleeve 37, a gear plate 38, a secondary meshing tooth 39, a main shaft assembly hole 40, a secondary transmission tooth.

Detailed Description

Example 1

As shown in fig. 1 to 3, the double-speed wheel hub motor for a small farm machine of the present embodiment includes a wheel hub 1, a power mechanism, a main shaft 30, a primary speed reduction mechanism, a secondary speed reduction mechanism, a clutch device, a front end cover 22, and a rear end cover 21, wherein two ends of the wheel hub 1 are fixedly connected with the front end cover 22 and the rear end cover 21 through screws; the power mechanism comprises a stator assembly consisting of a stator coil 4, a stator support 5 and a stator core 6, wherein the stator support 5 is fixedly connected with the inner wall of the hub 1, the power mechanism also comprises a rotor assembly consisting of a rotor magnetic ring 2 and a rotor support 3, and the power mechanism is arranged at the tail part in the hub 1.

The primary speed reducing mechanism comprises a primary central gear 7, 3 primary planet gears 8, a primary gear ring 10 and a primary planet carrier 9, the primary gear ring 10 is fixedly arranged in the hub 1, the 3 primary planet gears 8 are arranged between the primary gear ring 10 and the primary central gear 7, two sides of each primary planet gear 8 are respectively meshed with the primary gear ring 10 and the primary central gear 7, a planet column assembling hole and a bearing are arranged at the center of each primary planet gear 8, one end of a planet column 19 is in rotating fit with the bearing, the other end of the planet column 19 is fixedly connected with the primary planet carrier 9, the gear ratio of the primary central gear 7, the primary planet gears 8 and the primary gear ring 10 is 19:35:89, the speed ratio of the primary speed reducing mechanism is 4.68, and the distribution structure of the primary speed reducing mechanism is shown in figure 4.

The clutch device comprises a clutch seat 15, a movable armature 16 and an armature post 17, wherein one side of the clutch seat 15 is fixedly connected with a primary planet carrier 9 through screws, the structure of the clutch device is shown in figures 7 and 8, the center of the clutch seat 15 is provided with a clutch seat central hole 34 suitable for a main shaft 30 to pass through, the edge of the clutch seat 15 is provided with 6 clutch seat mounting holes 36 arranged on the same circumference, so that the clutch seat 15 is fixedly connected with the primary planet carrier 9 through 6 screws, the other side of the clutch seat 15 is provided with a plurality of clutch transmission teeth 35 in a protruding mode along the axial direction, and the clutch transmission teeth 35 are uniformly distributed on the same circumference.

The secondary speed reducing mechanism comprises a secondary central gear 11, 3 secondary planet wheels 12, a secondary gear ring 14 and a secondary planet carrier 13, wherein the secondary gear ring 14 is fixedly arranged in the hub 1, the 3 secondary planet wheels 12 are arranged between the secondary gear ring 14 and the secondary central gear 11, two sides of each secondary planet wheel 12 are respectively meshed with the secondary gear ring 14 and the secondary central gear 11, a planet column assembling hole and a bearing are arranged at the center of each secondary planet wheel 12, one end of a planet column 19 is in rotating fit with the bearing, a planet column installing hole 28 is arranged on the secondary planet carrier 13, the other end of the planet column 19 is fixedly arranged in the planet column installing hole 28, so that the planet column 19 is fixedly connected with the secondary planet carrier 13, and the gear ratio of the secondary central gear 11, the secondary planet wheels 12 and the secondary gear ring 14 is 19:35:89, so that the speed ratio of the secondary speed reducing mechanism is 4.

As shown in fig. 9 and 10, the secondary sun gear 11 includes a gear plate 38 and a gear sleeve 37 which are integrally formed, a secondary meshing tooth 39 adapted to the secondary planet gear 12 is provided on the gear sleeve 37, a main shaft assembly hole 40 adapted to the main shaft 30 is provided at the center of the gear sleeve 37 and the gear plate 38, a plurality of secondary transmission teeth 41 are provided at one side of the gear plate 38 in an axially protruding manner, each secondary transmission tooth 41 is uniformly distributed on the same circumference so as to form a transmission groove 42 adapted to the clutch transmission tooth 35 between two adjacent secondary transmission teeth 41, an annular movable armature 16 is fixedly provided at the edge of the gear plate 38, the movable armature 16 and the gear plate 38 are fixed by 6 screws, 3 guide posts 20 are provided on the movable armature 16, 3 countersunk holes adapted to the guide posts 20 are provided on the primary planet carrier 9, a return spring 23 sleeved to the guide posts 20 is provided in the countersunk hole, one end of each guide post 20 is fixedly connected to the movable armature 16, the other end of the guide post 20 is sleeved with a return spring 23 after extending into the countersunk hole, and the guide post 20 is limited by the return spring 23, so that the guide post 20 can move axially in the countersunk hole and the return spring 23 drives the guide post 20 to reset.

The main shaft 30 passes through the centers of the secondary planet carrier 13, the gear disc 38, the gear sleeve 37, the clutch seat 15 and the primary planet carrier 9, through holes suitable for the main shaft 30 to pass through are formed in the centers of the stator support 5 and the rotor support 3, so that the tail end of the main shaft 30 is in running fit with the center of the rear end cover 21 through the rear end cover bearing 24, and the front end of the main shaft 30 passes through the front end cover 22 and is in running fit with the center of the front end cover 22 through the front end cover bearing 25; a bearing 26 is arranged between the primary planet carrier 9 and the main shaft 30, as shown in fig. 5 and 6, a main shaft installation square hole 27 is arranged at the center of the secondary planet carrier 13, 3 armature posts 17 are axially and convexly arranged on the secondary planet carrier 13, each armature post 17 is arranged between the gaps of two adjacent secondary planet gears 12, the front end of each armature post 17 is fixedly connected with the secondary planet carrier 13 through a connecting pin 29, the tail end of each armature post 17 extends out of the end surface of the secondary planet gear 12 and is provided with a gap with a movable armature 16, an electromagnet 18 is respectively arranged in each armature post 17, the movable armature 16 is tightly attached to the primary planet carrier 9 under the action of a return spring 23 when the electromagnet 18 is powered off, so that a clutch transmission tooth 35 on the clutch seat 15 is wedged with a transmission groove 42 on a gear plate 38, the primary planet carrier 9 is in transmission fit with the secondary central gear 11 through the clutch seat 15, the primary gear ring 10 drives the, the primary planet carrier 9 is used as the input of the secondary speed reducing mechanism, the secondary gear ring 14 is used as the output end of the secondary speed reducing mechanism to drive the hub 1 to rotate, and the secondary planet carrier 12 drives the main shaft 30 to rotate, so that secondary speed reduction is realized; when the electromagnet 18 is electrified, magnetism is generated to adsorb the movable armature 16 to move axially along the spindle 30, the reset spring 23 is compressed, the movable armature 16 drives the secondary sun gear 11 to move so as to enable the clutch transmission teeth 35 on the clutch seat 15 to be separated from the transmission grooves 42 on the gear disc 38, the movable armature 16 is adsorbed and fixed with the armature posts 17, the secondary sun gear 11 is separated from the secondary planet gears 12, the primary gear ring 10 drives the hub 1 to rotate, the secondary gear ring 14 rotates synchronously with the hub 1 to drive the secondary planet gears 12 and the secondary sun gear 11 to idle, and primary speed reduction is achieved.

Example 2

The working method of the double-speed wheel hub motor for the small agricultural machine comprises the following steps:

A. the road surface high-speed driving state: the stator coil 4 and the electromagnet 18 are electrified, the armature post 17 generates magnetism to adsorb the movable armature 16 to move axially along the main shaft 30, the reset spring 23 is compressed, the movable armature 16 drives the secondary central gear 11 to move so as to enable the clutch transmission teeth 35 on the clutch seat 15 to be separated from the transmission grooves 42 on the gear disc 38, the movable armature 16 is adsorbed and fixed with the armature post 17, the secondary central gear 11 is separated from the secondary planet gears 12, the stator coil 4 is electrified and then drives the rotor assembly to rotate, the rotor assembly drives the primary central gear 7 to rotate, the primary central gear 7 drives the primary planet gears 8, the primary planet carriers 9 and the clutch seat 15 to rotate, the primary planet gears 8 drive the primary ring gear 10 and the hub 1 to rotate, the hub 1 drives the secondary ring gear 14 to rotate, and the secondary planet gears 12 and the secondary central gear 11 are driven to idle by the secondary ring gear;

B. and (3) low-speed operation state in the field: the stator coil 4 is electrified, the electromagnet 18 is powered off, the movable armature 16 is tightly attached to the primary planet carrier 9 under the action of the reset spring 23, the clutch transmission gear 35 on the clutch seat 15 is wedged with the transmission groove 42 on the gear disc 38, the secondary central gear 11 is meshed with the secondary planet gear 12, the stator coil 4 is electrified and then drives the rotor assembly to rotate, the rotor assembly drives the primary central gear 7 to rotate, the primary central gear 7 drives the primary planet gear 8, the primary planet carrier 9 and the clutch seat 15 to rotate, the primary planet carrier 9 drives the secondary central gear 11 to rotate through the clutch seat 15, the secondary central gear 11 drives the secondary planet gear 12 and the secondary planet carrier 13 to rotate, the secondary planet gear 12 is matched with the secondary gear ring 14, and the secondary gear ring 14 is used as the output end of the secondary speed reducing mechanism to drive the hub 1 to rotate, so as to realize secondary.

When the double-speed wheel hub motor for the small agricultural machine is in a high-speed driving state on a road surface, the output rotating speed of the wheel hub 1 is 4.68 times of the rotating speed of the rotor support 3, and when the double-speed wheel hub motor for the small agricultural machine is in a low-speed operation state in a field, the output rotating speed of the wheel hub 1 is 21.9 times of the rotating speed of the rotor support 3.

It should be understood that the above examples are only for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And that obvious changes and modifications may be made without departing from the spirit of the invention.

Claims (6)

1. A double-speed wheel hub motor for small agricultural machinery is characterized by comprising a wheel hub, a power mechanism, a main shaft, a primary speed reducing mechanism and a secondary speed reducing mechanism,

the primary speed reducing mechanism comprises a primary central gear, a plurality of primary planet gears, a primary gear ring and a primary planet carrier which are in transmission fit, the primary central gear is in transmission fit with the power mechanism, the primary gear ring is fixedly arranged on the inner wall of the hub and drives the hub to rotate through the primary gear ring,

the secondary speed reducing mechanism comprises a secondary central gear, a plurality of secondary planet gears, a secondary gear ring and a secondary planet carrier which are in transmission fit, the secondary gear ring is fixedly arranged on the inner wall of the hub,

the front end of main shaft stretches out the wheel hub setting, and the middle part of main shaft and the middle part of second grade planet carrier are fixed to be linked to each other, and the center and the main shaft of one-level planet carrier are through bearing normal running fit, through clutch transmission cooperation between one-level planet carrier and the second grade sun gear to make clutch between one-level planet carrier and the second grade sun gear drive wheel hub, main shaft rotation after being decelerated through power unit through one-level reduction gears, drive wheel hub rotation after being decelerated through one-level reduction gears by power unit when being in the linkage state, drive secondary gear ring, second grade planet wheel, idle running of second grade sun gear by wheel hub when clutch between one-level planet carrier and the second grade sun gear is in the disengagement state.

2. The double-speed wheel hub motor for small agricultural machinery according to claim 1, wherein the clutch device comprises a clutch base, a movable armature and an armature post, one side of the clutch base is fixedly connected with the primary planet carrier, the other side of the clutch base is provided with a plurality of clutch transmission teeth in a protruding manner along the axial direction, each clutch transmission tooth is uniformly distributed on the same circumference, the secondary central gear comprises a gear disc and a gear sleeve which are integrally formed, one side of the gear disc is provided with a plurality of secondary transmission teeth in a protruding manner along the axial direction, each secondary transmission tooth is uniformly distributed on the same circumference so as to form a transmission groove matched with the clutch transmission tooth between two adjacent secondary transmission teeth, the movable armature is fixedly arranged on the edge of the gear disc, the movable armature is provided with a plurality of guide posts, the primary planet carrier is provided with a countersunk hole matched with the guide posts, and a reset spring sleeved with the guide posts is arranged in the countersunk hole, a plurality of armature columns are arranged on the secondary planet carrier in a protruding mode along the axial direction, each armature column is arranged between the gaps of the adjacent secondary planet wheels, the end portion of each armature column extends out of the end face of each secondary planet wheel and is arranged to be spaced from a movable armature, an electromagnet is arranged in each armature column, and when the electromagnet is powered off, the movable armature is tightly attached to the primary planet carrier under the action of a reset spring, so that clutch transmission teeth on the clutch seat are wedged with transmission grooves on the gear disc; when the electromagnet is electrified, magnetism is generated to adsorb the movable armature to move axially along the main shaft, the reset spring is compressed, the movable armature drives the secondary central gear to move so that a clutch transmission gear on the clutch seat is separated from a transmission groove on the gear disc, the movable armature is adsorbed and fixed with the armature post, the secondary central gear is separated from the secondary planet gear and drives the hub to rotate by the primary gear ring.

3. A two-speed in-wheel motor as claimed in claim 1 or 2 wherein said power mechanism includes a stator assembly comprising a stator coil, a stator bracket, and a stator core, said stator bracket being fixedly connected to the inner wall of the wheel hub, and a rotor assembly comprising a rotor magnet ring and a rotor bracket, said primary sun gear being fixedly connected to the rotor bracket, said rotor assembly cooperating with the stator assembly to energize the stator core and drive said rotor bracket to rotate, said rotor bracket driving the primary sun gear to rotate.

4. A double-speed in-wheel motor for small agricultural machinery as claimed in claim 3 wherein 3 primary planet gears are provided between the primary gear ring and the primary sun gear, both sides of each primary planet gear are respectively engaged with the primary gear ring and the primary sun gear, the center of each primary planet gear is in rolling connection with the planet post on the primary planet carrier through a bearing, and the primary planet carrier is in transmission fit with the main shaft through a bearing.

5. A double-speed hub motor for small agricultural machinery as claimed in claim 4, wherein 3 secondary planet gears are provided between the secondary gear ring and the secondary sun gear, both sides of each secondary planet gear are respectively engaged with the secondary gear ring and the secondary sun gear, the center of each secondary planet gear is connected with the planet post on the secondary planet carrier in a rolling manner through a bearing, and the center of the secondary planet carrier is tightly and fixedly connected with the main shaft.

6. The double-speed wheel hub motor for small agricultural machinery as claimed in claim 5, further comprising a front end cap and a rear end cap, wherein the centers of the stator support and the rotor support are provided with through holes suitable for the main shaft to pass through, so that the tail end of the main shaft is rotatably fitted with the center of the rear end cap through the rear end cap bearing, and the front end of the main shaft passes through the front end cap and is rotatably fitted with the center of the front end cap through the front end cap bearing.

Images