CN210780395U

CN210780395U - Permanent magnet type concentric shaft double-drive outer rotor middle motor

Info

Publication number: CN210780395U
Application number: CN201921363705.4U
Authority: CN
Inventors: 隗俊
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-08-21
Filing date: 2019-08-21
Publication date: 2020-06-16
Anticipated expiration: 2029-08-21

Abstract

The utility model provides a put motor in two external rotors that drive of permanent magnetism formula concentric shaft belongs to the motor and makes technical field, and its structure includes axis, axle sleeve, motor stator and rotor, controls end cover, motor line and motor drive wheel. The shaft sleeve is arranged on the middle shaft through a bearing, the motor stator is fixed on the shaft sleeve, and the left end cover and the right end cover are arranged on two sides of the motor stator through bearings and are connected with the motor rotor to form a motor shell. The motor rotor comprises magnetic steel and a motor steel ring; a motor cable groove is formed in the outer circular surface of the shaft sleeve; one end of the motor wire is connected with the stator coil, and the other end of the motor wire penetrates through the motor cable groove and is led out of the motor from the left end cover or the right end cover. And a motor driving wheel is arranged on the outer side of the left end cover or the right end cover. The utility model discloses need not controlling means, can realize manpower, electric drive and mutual helping hand driven free clutch. When the bicycle runs by sliding and pedaling, the motor is separated from the running wheel, and the riding effect is basically the same as that of a bicycle.

Description

Permanent magnet type concentric shaft double-drive outer rotor middle motor

Technical Field

The utility model relates to a motor, specifically speaking are motor in permanent magnetism formula concentric shaft dual drive external rotor mainly is applied to two-wheeled, tricycle, four-wheel electric bicycle.

Background

At present, an inner rotor permanent magnet motor with a speed reduction device is adopted in a middle motor used on an electric moped. This type of motor suffers from the following disadvantages: the transmission chain is long, and technical parts are many, therefore, its manufacturing technology degree of difficulty, material cost are higher than general motor to because the rotational speed is high, heat effect is produced easily to the motor that heaies up soon, reduces the work efficiency of motor. And the price of the inner rotor permanent magnet type middle motor with the speed reducing device is more than 5 times that of the common outer rotor permanent magnet motor.

As is well known, under the same technical conditions, the rotational inertia, the output torque and the heat dissipation performance of the permanent magnet type outer rotor motor are superior to those of the permanent magnet type inner rotor motor. And the price is far lower than that of a permanent magnet type inner rotor built-in motor with a speed reducing device.

However, since the conventional permanent magnet type outer rotor motor mainly includes a central shaft, a stator, and a rotor. The central shaft and the stator are fixed together, and the motor wire connected with the stator coil passes through the L-shaped or oblique threading hole of the central shaft, so that the central shaft is not rotatable. However, the safety specifications for electric bicycles (GB 17761-2018), which are released in 5/15/2018 and enforced in 4/15/2019, stipulate that the electric bicycle "must have a pedal riding function". As a middle motor, a permanent magnet type outer rotor motor with a traditional structure cannot be realized.

Disclosure of Invention

The technical task of the utility model is to prior art not enough, provide a do not have decelerator's permanent magnetism type concentric shaft double-drive external rotor and put motor in.

The utility model provides a technical scheme that its technical problem adopted is:

a permanent magnet concentric shaft double-drive outer rotor middle motor comprises a middle shaft, a shaft sleeve, a motor stator, a motor rotor, a left end cover, a right end cover, a motor wire and a motor driving wheel. The motor comprises a shaft sleeve, a motor stator, a left end cover, a right end cover, a motor rotor and a motor shell, wherein the shaft sleeve is arranged on a middle shaft through a bearing;

a through hole matched with the middle shaft is formed in the center of the shaft sleeve, bearing seats are arranged at two ends of the through hole, and a motor cable groove is formed in the outer circular surface of the shaft sleeve;

one end of the motor wire is connected with the motor stator coil, and the other end of the motor wire penetrates through the motor cable groove and then is led out from the outer side of the left end cover or the right end cover;

and a motor driving wheel is further arranged on the outer side of the left end cover or the right end cover.

Furthermore, the middle shaft is a stepped shaft, and the connection part of the two end parts of the middle shaft and the pedal crank is provided with internal threads or external threads.

Further, the motor transmission wheel is a chain wheel or a belt pulley.

The utility model discloses a concentric shaft double-drive outer rotor centrally-mounted motor compares with prior art, and produced beneficial effect is:

1) the utility model discloses a concentric shaft double-drive external rotor middle motor is not equipped with decelerator, only needs the one-level transmission, just can drive the wheel of traveling and go.

2) The free clutch of manual pedal driving, pure electric driving and human-electricity mutual power driving can be realized without any control device; when the bicycle is sliding or pedaled manually, the motor can be automatically separated from the running wheel, and the running effect is basically the same as that of the traditional bicycle.

3) Adopt the utility model discloses an electric bicycle rides the operation simpler, safety, and remaining power, energy-conservation to can improve electric bicycle's continuation of the journey mileage and power performance, reduce electric bicycle's manufacturing cost.

Drawings

FIG. 1 is a schematic view of the overall cross-sectional structure of the present invention;

FIG. 2 is a schematic structural view (female threads) of a first embodiment of the shaft of FIG. 1;

FIG. 3 is a schematic structural view (external threads) of a second embodiment of the shaft of FIG. 1;

FIG. 4 is a schematic cross-sectional view of the bushing of FIG. 1;

FIG. 5 is a schematic left side view of the structure of FIG. 4;

FIG. 6 is a schematic top view of the structure of FIG. 4;

FIG. 7 is a schematic left side view of the structure of FIG. 6;

FIG. 8 is a schematic view of the external structure of the present invention;

fig. 9 is a schematic view of the connection structure between the present invention and a first motor support (frame support);

FIG. 10 is a schematic left side view of the structure of FIG. 9;

fig. 11 is a schematic view of the connection structure between the present invention and the second kind of motor support (side support);

FIG. 12 is a left side view schematic of the structure of FIG. 11;

FIG. 13 is a schematic view of the connection structure of the bottom bracket and the footrest assembly;

FIG. 14 is a schematic view of the structure of the electric bicycle of the present invention supported by a frame;

fig. 15 is a schematic view of the side support of the electric bicycle according to the present invention.

In the figure, 1, a middle shaft, 2, a shaft sleeve, 201, a through hole, 202, a bearing seat, 203, a machine cable groove, 204, a seal ring seat, 3, a motor stator, 4, a motor rotor, 5, a left end cover, 6, a right end cover, 7, a motor wire, 8, a motor driving wheel, 9, a frame support, 10, a side support, 11, a pedal, 12, a pedal crank, 13 and a pedal chain wheel.

Detailed Description

The permanent magnet concentric shaft dual-drive outer rotor built-in motor of the present invention will be described in detail below with reference to fig. 1 to 15.

As shown in fig. 1 and 8, the permanent magnet concentric shaft dual-drive middle motor of the outer rotor of the present invention comprises a middle shaft 1, a shaft sleeve 2, a motor stator 3, a motor rotor 4, a left end cap 5, a right end cap 6, a motor wire 7 and a motor driving wheel 8, wherein the shaft sleeve 2 is arranged on the middle shaft 1 through a bearing, the motor stator 3 is fixed on the shaft sleeve 2, the left end cap 5 and the right end cap 6 are respectively arranged on the shaft sleeves 2 at the left and right sides of the motor stator 3 through bearings and are connected into a motor housing through the motor rotor 4, and the motor rotor 4 comprises a motor steel ring and motor magnetic steel arranged on the inner circular surface of the motor steel ring; and a motor driving wheel 8 is further arranged on the outer side of the left end cover 5 or the right end cover 6, and the motor driving wheel 8 is a chain wheel or a belt pulley.

As shown in fig. 2, 3 and 13, the central shaft 1 is a stepped shaft, the connection between the two ends of the stepped shaft and the pedal crank 12 is provided with internal threads or external threads, the pedal crank 12 is connected with the pedal 11, and the connection between the pedal crank 12 and the central shaft 1 is further provided with a pedal chain wheel 13.

As shown in fig. 4-7, a through hole 201 matched with the middle shaft 1 is formed in the center of the shaft sleeve 2, a bearing seat 202 and a sealing ring seat 204 are arranged at two ends of the through hole 201 and are respectively used for fixing a bearing and a sealing ring, a motor cable groove 203 is formed in the outer circular surface of the shaft sleeve 2, one end of the motor wire 7 is connected with a motor stator coil, and the other end of the motor wire 7 is led out from the outer side of the left end cover 5 or the right end cover 6 after penetrating through the motor cable groove 203.

As shown in fig. 9, 10 and 14, the motor is connected with a frame support, the frame support is formed by welding or bolting rectangular or square steel plates, and the frame support is installed at the position of a center shaft of the electric bicycle.

As shown in fig. 11, 12 and 15, the motor is connected with a side support, the side support is a left support plate and a right support plate, and the side support is installed at the position of a middle shaft of the electric moped.

The utility model discloses a put motor in two external rotors that drive of permanent magnetism formula concentric shaft, its theory of operation as follows:

the utility model discloses a put motor in two external rotors that drive of permanent magnetism formula concentric shaft, its both ends that utilize the motor shaft cover, with the motor installation fix the axis of electric bicycle frame pedal the position on, the axle sleeve is immovable together with motor stator. When the electric power-assisted vehicle provided with the motor is ridden, the motor can be used for assisting power by pedaling, namely, the pedals are pedaled to drive the middle shaft to rotate, and meanwhile, the chain wheel is driven to rotate, and the rear wheel is driven to rotate under the action of the chain; in addition, when the motor works, the outer rotor of the motor rotates to drive the motor driving wheel to rotate and output power to the rear wheel.

Claims

1. The utility model provides a put motor in two outer rotors that drive of permanent magnetism formula concentric shaft, includes axis (1), axle sleeve (2), motor stator (3), electric motor rotor (4), left end lid (5), right-hand member lid (6), motor line (7) and motor drive wheel (8), its characterized in that:

the motor is characterized in that the shaft sleeve (2) is arranged on the middle shaft (1) through a bearing, the motor stator (3) is fixed on the shaft sleeve (2), the left end cover (5) and the right end cover (6) are respectively arranged on the shaft sleeves (2) on the left side and the right side of the motor stator (3) through bearings and are connected into a motor shell through the motor rotor (4), and the motor rotor (4) comprises motor magnetic steel and a motor steel ring;

a through hole (201) matched with the middle shaft (1) is formed in the center of the shaft sleeve (2), bearing seats (202) are arranged at two ends of the through hole (201), and a motor cable groove (203) is formed in the outer circular surface of the shaft sleeve (2);

one end of the motor wire (7) is connected with a motor stator coil, and the other end of the motor wire (7) penetrates through the motor cable slot (203) and then is led out from the outer side of the left end cover (5) or the right end cover (6);

and a motor driving wheel (8) is further arranged on the outer side of the left end cover (5) or the right end cover (6).

2. The permanent magnet type concentric shaft double-drive outer rotor built-in motor is characterized in that the middle shaft (1) is a stepped shaft, and the connection part of the two end parts of the middle shaft and the pedal crank is provided with internal threads or external threads.

3. The permanent magnet type concentric shaft double-drive outer rotor built-in motor is characterized in that the motor driving wheel (8) is a chain wheel or a belt pulley.