阅读说明：本技术 电动变矩式永磁无刷电机 (Electric torque-changing permanent magnet brushless motor ) 是由 张继美 杨洪开 于 2019-10-23 设计创作，主要内容包括：本发明提供了电动变矩式永磁无刷电机,其包括电机主体以及安装于电机主体内并与电机主体的输出轴同轴布置的辅助变矩装置,辅助变矩装置用于改变电机主体的输出轴转矩大小,辅助变矩装置包括安装机构、调整机构,安装机构用于电机主体内的输出轴、线圈、永磁体三者之间的安装连接,调整机构用于手动改变线圈/永磁体与输出轴之间的距离并进而改变输出轴的转矩大小,所述的安装机构包括线圈安装构件、磁体安装构件,线圈安装构件用于线圈与输出轴之间的安装连接,磁体安装构件用于永磁体与输出轴之间的安装连接。(The invention provides an electric torque-variable permanent magnet brushless motor, which comprises a motor main body and an auxiliary torque-variable device which is arranged in the motor main body and is coaxially arranged with an output shaft of the motor main body, wherein the auxiliary torque-variable device is used for changing the torque of the output shaft of the motor main body, the auxiliary torque-variable device comprises an installation mechanism and an adjustment mechanism, the installation mechanism is used for installing and connecting the output shaft, a coil and a permanent magnet in the motor main body, the adjustment mechanism is used for manually changing the distance between the coil/permanent magnet and the output shaft and further changing the torque of the output shaft, the installation mechanism comprises a coil installation component and a magnet installation component, the coil installation component is used for installing and connecting the coil and the output shaft, and the magnet installation component is used for installing.)

1. The electric torque-variable permanent magnet brushless motor is characterized by comprising a motor main body and an auxiliary torque-variable device which is arranged in the motor main body and is coaxially arranged with an output shaft of the motor main body, wherein the auxiliary torque-variable device is used for changing the torque of the output shaft of the motor main body;

the mounting mechanism comprises a coil mounting component and a magnet mounting component, the coil mounting component is used for mounting and connecting the coil and the output shaft, and the magnet mounting component is used for mounting and connecting the permanent magnet and the output shaft.

2. The electric torque converter type permanent magnet brushless motor according to claim 1, wherein the coil mounting member includes a coil pulling member and a coil mounting member, the coil pulling member includes a fixed cylinder and a pulling cylinder, the fixed cylinder is coaxially movably sleeved outside the output shaft and is fixedly connected to a motor housing of the motor body, the pulling cylinder is located on a side of the fixed cylinder away from the power output end of the output shaft, the pulling cylinder is coaxially movably sleeved outside the output shaft and is capable of moving along the axial direction of the output shaft, the outer circumferential surface of the fixed cylinder is provided with a first hinge protrusion, and the outer circumferential surface of the pulling cylinder is provided with a second hinge protrusion.

3. The electric torque converter permanent magnet brushless motor according to claim 2, wherein the coil mounting member includes a bracket, a first connecting rod, and a first push-pull rod, the bracket is located between the output shaft and the motor housing of the motor main body, one end of the connecting rod is hinged to the first hinge projection provided on the outer circumferential surface of the fixed cylinder, the other end of the connecting rod is hinged to the bracket, and both hinge axis lines are parallel to the tangential direction of the output shaft at the corresponding point, the connecting rods are provided with two sets of the first connecting rod and the second connecting rod respectively located on the side of the first connecting rod facing the power output end of the output shaft, and the first connecting rod and the second connecting rod are parallel to each other;

one end of the first push-pull rod is hinged with a second hinge bulge arranged on the outer circular surface of the pulling cylinder, the other end of the first push-pull rod is hinged with a first connecting rod, core lines of the two hinge shafts are parallel to the tangential direction of the corresponding point on the output shaft, an avoiding groove is arranged at the hinge point between the first push-pull rod and the first connecting rod, the second connecting rod and the first push-pull rod are all located in the same plane.

4. The brushless electric motor of claim 3, wherein the coils are fixedly mounted on the frame, the coils are arranged in a plurality of groups in an array along a circumferential direction of the output shaft, the coil mounting members are arranged in a plurality of groups in a corresponding array, and the first hinge protrusions arranged on the outer circumferential surface of the fixed cylinder and the second hinge protrusions arranged on the outer circumferential surface of the pulling cylinder are arranged in a corresponding array.

5. The electric torque converter permanent magnet brushless motor of claim 4, wherein the magnet mounting structure is located on a side of the coil pulling member facing away from the power output end of the output shaft, the magnet mounting structure comprising a magnet pulling member and a magnet mounting member;

the magnet pulling piece comprises an installation cylinder and a connecting cylinder, the installation cylinder is coaxially and fixedly installed outside the output shaft, the connecting cylinder is located on one side, deviating from the power output end of the output shaft, of the installation cylinder, the connecting cylinder is coaxially sleeved outside the output shaft, the connecting cylinder can displace along the axial direction of the output shaft, a first connecting bulge is arranged on the outer circular surface of the installation cylinder, and a second connecting bulge is arranged on the outer circular surface of the connecting cylinder.

6. The electric torque converter permanent magnet brushless motor according to claim 5, wherein the magnet mounting member comprises a mounting plate, a support rod and a second push-pull rod, the mounting plate is located between the coil and the output shaft, one end of the support rod is hinged to the first connecting protrusion arranged on the outer circumferential surface of the mounting cylinder, the other end of the support rod is hinged to the mounting plate, core wires of the two hinge shafts are parallel to the tangential direction of the output shaft at a point corresponding to the support rod, the support rods are provided with two groups along the axial direction of the output shaft, the two groups are respectively a first support rod and a second support rod located between the first support rod and the coil pulling member, and the first support rod and the second;

one end of the second push-pull rod is hinged with the second connecting bulge arranged on the outer circular surface of the connecting cylinder, the other end of the second push-pull rod is hinged with the first support rod, core lines of the two hinged shafts are parallel to the tangential direction of the corresponding point on the output shaft, a sliding groove is arranged at the hinged point between the second push-pull rod and the first support rod, the second support rod and the second push-pull rod are all located in the same plane.

7. The electric torque converter permanent magnet brushless motor of claim 6, wherein the permanent magnets are fixedly mounted on the mounting plate, the permanent magnets are arrayed in a plurality of groups along the circumferential direction of the output shaft, the magnet mounting members are arrayed in a plurality of groups corresponding to the array, and the first connecting protrusion disposed on the outer circumferential surface of the mounting cylinder and the second connecting protrusion disposed on the outer circumferential surface of the connecting cylinder are arrayed in a plurality of groups corresponding to the array.

8. The electric torque converter permanent magnet brushless motor according to claim 6 or 7, wherein a traction member is arranged between the magnet pulling member and the coil pulling member, and the magnet pulling member and the coil pulling member are in traction linkage through the traction member;

the end surface of the pulling cylinder, which is far away from the power output end of the output shaft, is coaxially provided with a rotating sleeve, and the outer circular surface of the rotating sleeve is coaxially provided with a rotating groove in a ring groove structure;

the excircle surface of the mounting cylinder is provided with a key groove which penetrates through the axial thickness of the mounting cylinder.

9. The electric torque converter permanent magnet brushless motor of claim 8, wherein the traction member comprises a fixing rod and an insert, the insert is arranged in the rotary slot and has an arc block structure coaxially arranged with the rotary slot, the extending direction of the fixing rod is parallel to the axial direction of the output shaft, one end of the fixing rod is fixedly connected with the connecting cylinder, and the other end of the fixing rod passes through the key slot and is fixedly connected with the insert;

the traction piece is provided with a plurality of groups along the circumferential direction array of the output shaft, the groups of the mosaic blocks are jointly spliced to form a mosaic ring of a complete circular ring structure coaxially arranged with the rotary groove, and the mosaic ring and the rotary groove are in running fit.

10. The electric torque conversion type permanent magnet brushless motor according to claim 1 or 3, wherein the adjusting mechanism is located on a side of the magnet pulling piece away from the power output end of the output shaft, the adjusting mechanism comprises a controller, an adjusting motor and a push-pull member, the adjusting motor is used for providing power for the operation of the push-pull member, the push-pull member is used for pulling the connecting cylinder to displace along the axial direction of the output shaft, and the controller is used for a user to manually control the opening and closing of the adjusting motor;

the adjusting motor is fixed on a motor shell of the motor main body, the adjusting motor and the motor main body are coaxially arranged, and a power output end of the adjusting motor extends into the motor main body;

the push-pull component comprises an installation disc, a push-pull sleeve, a push-pull lead screw and a gear transmission group, the installation disc is coaxially and movably installed outside the output shaft through a bearing, the axial direction of the push-pull lead screw is parallel to the axial direction of the output shaft, the push-pull lead screw is movably installed on the installation disc, two ends of the push-pull lead screw are respectively located on one side of the installation disc, and three groups of the push-pull lead screw are arrayed in the circumferential direction of the installation disc;

the end face, deviating from the power output end of the output shaft, of the connecting cylinder is coaxially provided with an installation sleeve, the push-pull sleeves are coaxially and movably installed outside the installation sleeve, the push-pull sleeves and the installation sleeve form rotating fit, the push-pull sleeves are further installed between the nuts and the push-pull lead screws, three groups of nuts are correspondingly arranged on the push-pull sleeves, and the push-pull lead screws rotate and pull the push-pull sleeves to displace along the axial direction of the output shaft;

the gear transmission set comprises a driving straight gear and a driven straight gear, the driving straight gear is coaxially and fixedly arranged outside the power output end of the adjusting motor, the driven straight gear is coaxially and fixedly arranged outside the push-pull screw rod, three groups of driven straight gears are correspondingly arranged, and the driving straight gear is meshed with the driven straight gear.

Technical Field

The invention relates to the field of motors, in particular to a motor main body capable of manually adjusting torque of an output shaft.

Background

The motor, also called as motor, is a device for converting electric energy into mechanical energy, and is further divided into a brush motor and a motor main body, wherein the most obvious difference between the brush motor and the motor main body is whether a common brush-commutator is configured, the commutation of the brush direct current motor is realized by contacting a graphite brush with a ring-shaped commutator mounted on a rotor in the past century, and the motor main body feeds back the position of the rotor to a control circuit through a hall sensor, so that the motor main body can know the accurate time of the commutation (sequence) of the motor phase, and because the motor main body has no brush, no related interface exists, the motor main body is cleaner, has less acoustic noise, does not need maintenance in fact, has longer service life, and is widely applied, but no matter the motor main body or the brush motor, the rotating speed is a constant value under the same power condition, the invention discloses a motor main body, which is characterized in that the power of a motor is required to be improved when the rotating speed of the motor is increased, but the motor is burnt once the power exceeds the maximum power of the motor.

Disclosure of Invention

In order to solve the disadvantages of the prior art, an object of the present invention is to provide a motor body capable of manually adjusting the torque of an output shaft, wherein a user can manually control and change the distance between a coil/permanent magnet and the output shaft, that is, the torque of the output shaft, because the torque is inversely proportional to the rotation speed, the output rotation speed after the output shaft can be increased under the same power condition, and the time required for reducing the rotation speed of the motor body to zero when the motor body is powered off and stops running can be shortened.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

The electric torque-variable permanent magnet brushless motor comprises a motor main body and an auxiliary torque-variable device which is arranged in the motor main body and is coaxially arranged with an output shaft of the motor main body, wherein the auxiliary torque-variable device is used for changing the torque of the output shaft of the motor main body;

the mounting mechanism comprises a coil mounting component and a magnet mounting component, the coil mounting component is used for mounting and connecting the coil and the output shaft, and the magnet mounting component is used for mounting and connecting the permanent magnet and the output shaft.

As a further improvement of the present solution.

The coil mounting component comprises a coil pulling part and a coil mounting part, the coil pulling part comprises a fixed cylinder and a pulling cylinder which are in a ring body structure, the fixed cylinder is coaxially and movably sleeved outside the output shaft and fixedly connected with a motor shell of the motor main body, the pulling cylinder is positioned on one side of the fixed cylinder, which is far away from the power output end of the output shaft, the pulling cylinder is coaxially and movably sleeved outside the output shaft and can move along the axial direction of the output shaft, a first hinge bulge is arranged on the outer circular surface of the fixed cylinder, and a second hinge bulge is arranged on the outer circular surface of the pulling cylinder;

the coil mounting piece comprises a support, a connecting rod and a first push-pull rod, the support is located between the output shaft and a motor shell of the motor main body, one end of the connecting rod is hinged to a first hinge bulge arranged on the outer circular surface of the fixed cylinder, the other end of the connecting rod is hinged to the support, core wires of the two hinge shafts are parallel to the tangential direction of a corresponding point on the output shaft, the connecting rod is provided with two groups of connecting rods I and a second connecting rod II, the two groups of connecting rods I and the second connecting rod II are located on one side, facing the power output end of the output shaft, of the first connecting;

one end of the first push-pull rod is hinged with a second hinge bulge arranged on the outer circular surface of the pulling cylinder, the other end of the first push-pull rod is hinged with a first connecting rod, core wires of the two hinge shafts are parallel to the tangential direction of a corresponding point on the output shaft, an avoidance groove is arranged at the hinge point between the first push-pull rod and the first connecting rod, the second connecting rod and the first push-pull rod are all positioned in the same plane;

the coil fixed mounting on the support, the coil be provided with a plurality of groups and the corresponding array of coil installed part has a plurality of groups along the circumferencial direction array of output shaft to set up in the outer disc of fixed cylinder articulated protruding one, set up in the outer disc of pulling cylinder articulated protruding two of array all have a plurality of groups.

As a further improvement of the present solution.

The magnet mounting component is positioned on one side of the coil pulling piece, which is far away from the power output end of the output shaft, and comprises a magnet pulling piece and a magnet mounting piece;

the magnet pulling piece comprises an installation cylinder and a connecting cylinder, the installation cylinder is coaxially and fixedly installed outside the output shaft, the connecting cylinder is located on one side, away from the power output end of the output shaft, of the installation cylinder, the connecting cylinder is coaxially and movably sleeved outside the output shaft and can move along the axial direction of the output shaft, a first connecting bulge is arranged on the outer circular surface of the installation cylinder, and a second connecting bulge is arranged on the outer circular surface of the connecting cylinder;

the magnet mounting piece comprises a mounting plate, support rods and a push-pull rod II, the mounting plate is positioned between the coil and the output shaft, one end of each support rod is hinged with a connecting bulge I arranged on the outer circular surface of the mounting cylinder, the other end of each support rod is hinged with the mounting plate, core wires of the two hinged shafts are parallel to the tangential direction of the corresponding point on the output shaft, the support rods are provided with two groups of support rods I and two support rods II which are positioned between the support rods I and the coil pulling piece respectively along the axial direction of the output shaft, and the support rods I and the support rods II are parallel;

one end of the second push-pull rod is hinged with a second connecting bulge arranged on the outer circular surface of the connecting cylinder, the other end of the second push-pull rod is hinged with a first supporting rod, core lines of the two hinged shafts are parallel to the tangential direction of a corresponding point on the output shaft, a sliding groove is arranged at the hinged point between the second push-pull rod and the first supporting rod, the second supporting rod and the second push-pull rod are all positioned in the same plane;

permanent magnet fixed mounting on the mounting panel, the permanent magnet is provided with a plurality of groups and the magnet installed part corresponds the array along the circumferencial direction array of output shaft and has a plurality of groups to set up in the protruding one of connection of the outer disc of installation cylinder, set up in the protruding two of connection of the outer disc of connecting cylinder and all correspond the array and have a plurality of groups.

As a further improvement of the present solution.

A traction piece is arranged between the magnet pulling piece and the coil pulling piece, and the magnet pulling piece and the coil pulling piece are in traction linkage through the traction piece;

the end surface of the pulling cylinder, which is far away from the power output end of the output shaft, is coaxially provided with a rotating sleeve, and the outer circular surface of the rotating sleeve is coaxially provided with a rotating groove in a ring groove structure;

the outer circular surface of the mounting cylinder is provided with a key groove penetrating through the axial thickness of the mounting cylinder;

the traction piece comprises a fixed rod and an embedding block, the embedding block is arranged in the rotary groove and is of an arc block structure coaxially arranged with the rotary groove, the extending direction of the fixed rod is parallel to the axial direction of the output shaft, one end of the fixed rod is fixedly connected with the connecting cylinder, and the other end of the fixed rod penetrates through the key groove and is fixedly connected with the embedding block;

the traction piece is provided with a plurality of groups along the circumferential direction array of the output shaft, the groups of the mosaic blocks are jointly spliced to form a mosaic ring of a complete circular ring structure coaxially arranged with the rotary groove, and the mosaic ring and the rotary groove are in running fit.

As a further improvement of the present solution.

The adjusting mechanism is positioned on one side of the magnet pulling piece, which is far away from the power output end of the output shaft, and comprises a controller, an adjusting motor and a push-pull component, wherein the adjusting motor is used for providing power for the operation of the push-pull component, the push-pull component is used for pulling the connecting cylinder to displace along the axial direction of the output shaft, and the controller is used for a user to manually control the opening and closing of the adjusting motor;

the adjusting motor is fixed on a motor shell of the motor main body, the adjusting motor and the motor main body are coaxially arranged, and a power output end of the adjusting motor extends into the motor main body;

the push-pull component comprises an installation disc, a push-pull sleeve, a push-pull lead screw and a gear transmission group, the installation disc is coaxially and movably installed outside the output shaft through a bearing, the axial direction of the push-pull lead screw is parallel to the axial direction of the output shaft, the push-pull lead screw is movably installed on the installation disc, two ends of the push-pull lead screw are respectively located on one side of the installation disc, and three groups of the push-pull lead screw are arrayed in the circumferential direction of the installation disc;

the end face, deviating from the power output end of the output shaft, of the connecting cylinder is coaxially provided with an installation sleeve, the push-pull sleeves are coaxially and movably installed outside the installation sleeve, the push-pull sleeves and the installation sleeve form rotating fit, the push-pull sleeves are further installed between the nuts and the push-pull lead screws, three groups of nuts are correspondingly arranged on the push-pull sleeves, and the push-pull lead screws rotate and pull the push-pull sleeves to displace along the axial direction of the output shaft;

the gear transmission set comprises a driving straight gear and a driven straight gear, the driving straight gear is coaxially and fixedly arranged outside the power output end of the adjusting motor, the driven straight gear is coaxially and fixedly arranged outside the push-pull screw rod, three groups of driven straight gears are correspondingly arranged, and the driving straight gear is meshed with the driven straight gear.

Compared with the prior art, the invention has the advantages that after the motor main body is electrified, the coil is fixed, and the permanent magnet/magnet mounting component/output shaft starts to rotate under the action of ampere force, wherein a user can manually control and adjust the on/off of the motor through the controller, so that the distance between the coil/permanent magnet and the output shaft is reduced, namely the torque of the output shaft is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic view of the internal structure of the present invention.

Fig. 4 is a schematic view of the internal structure of the present invention.

Fig. 5 is a schematic view of the internal structure of the present invention.

FIG. 6 is a schematic structural diagram of the mounting mechanism of the present invention.

Fig. 7 is a schematic structural view of a coil mounting member of the present invention.

Fig. 8 is a schematic structural view of a coil mounting member of the present invention.

Fig. 9 is a schematic structural view of the coil pulling member of the present invention.

Fig. 10 is a schematic structural view of the pulling barrel of the present invention.

Fig. 11 is a schematic structural view of a coil mount of the present invention.

Fig. 12 is a schematic structural view of a magnet installation member of the present invention.

Fig. 13 is a schematic structural view of a magnet installation member of the present invention.

Fig. 14 is a schematic structural view of the magnet pulling member of the present invention.

Fig. 15 is a schematic view of the structure of the magnet mount of the present invention.

FIG. 16 is a schematic view of the coil puller and magnet puller of the present invention.

FIG. 17 is a schematic view of the coil puller and magnet puller of the present invention.

Fig. 18 is a schematic structural diagram of an adjusting mechanism of the present invention.

Fig. 19 is a schematic structural diagram of an adjusting mechanism of the present invention.

Fig. 20 is a schematic structural view of the push-pull member of the present invention.

Detailed Description

The invention has the advantages that the manual regulation and control of the torque of the output shaft of the motor main body is adopted, after the motor main body is electrified, the coil is fixed, the permanent magnet/magnet mounting member/output shaft starts to rotate under the action of ampere force, wherein the user can manually control and adjust the on/off of the motor through the controller, thereby reducing the distance between the coil/permanent magnet and the output shaft, that is, the torque of the output shaft is reduced, and the torque and the rotation speed are inversely proportional, so that the output rotation speed after the output shaft is increased under the same power condition, besides, when the motor main body is powered off and stops running, a user can manually control and adjust the opening and closing of the motor and increase the distance between the coil/permanent magnet and the output shaft, that is, the torque of the output shaft is increased, thereby shortening the time required for the rotational speed of the motor main body to drop to zero.

The electric torque-converting permanent magnet brushless motor comprises a motor main body 100 and an auxiliary torque converting device which is installed in the motor main body 100 and is coaxially arranged with an output shaft 110 of the motor main body 100, wherein the auxiliary torque converting device is used for changing the torque of the output shaft 110 of the motor main body 100, the auxiliary torque converting device comprises an installation mechanism 200 and an adjusting mechanism 300, the installation mechanism 200 is used for installing and connecting the output shaft 110, a coil 120 and a permanent magnet 130 in the motor main body 100, and the adjusting mechanism 300 is used for manually changing the distance between the coil 120/the permanent magnet 130 and the output shaft 110 and further changing the torque of the output shaft 110.

When the motor body 100 is powered on, the coil 120 is engaged with the permanent magnet 130 and rotates the output shaft 110, and at the same time, the user can operate the adjusting mechanism 300 by manual control, thereby changing the distance between the coil 120/permanent magnet 130 and the output shaft 110 and thus changing the torque magnitude of the output shaft 110, wherein the distance between the coil 120/permanent magnet 130 and the output shaft 110 decreases, the torque of the output shaft 110 is reduced, and the torque and the rotation speed are inversely proportional, so that the rotation speed of the output shaft 110 is greater than that of the general motor body under the same power condition, the distance between the coil 120/the permanent magnet 130 and the output shaft 110 is increased, the torque of the output shaft 110 is increased, and under the same power condition, the rotating speed of the output shaft 110 is less than that of the ordinary motor main body, the former condition can be used for enabling the output rotating speed to be higher after the motor main body is started to work, and the latter condition can be used for shortening the time required for enabling the rotating speed to be reduced to zero when the motor main body stops running.

The mounting mechanism 200 includes a coil mounting member 210 and a magnet mounting member 220, wherein the coil mounting member 210 is used for mounting connection between the coil 120 and the output shaft 110, and the magnet mounting member 220 is used for mounting connection between the permanent magnet 130 and the output shaft 110.

The coil mounting member 210 includes a coil pulling member 2110 and a coil mounting member 2120, the coil pulling member 2110 includes a fixing cylinder 2111 and a pulling cylinder 2112 which are in a torus structure, the fixing cylinder 2111 is coaxially and movably sleeved outside the output shaft 110, the fixing cylinder 2111 is further fixedly connected with a motor housing of the motor body 100, the pulling cylinder 2112 is located on one side of the fixing cylinder 2111 departing from a power output end of the output shaft 110, the pulling cylinder 2112 is coaxially and movably sleeved outside the output shaft 110, the pulling cylinder 2112 can be displaced along an axial direction of the output shaft 110, a first hinge protrusion is arranged on an outer circumferential surface of the fixing cylinder 2111, and a second hinge protrusion is arranged on an outer circumferential surface of the pulling cylinder 2112.

The coil mounting member 2120 includes a bracket 2121, a connecting rod, and a first push-pull rod 2124, the bracket 2121 is located between the output shaft 110 and the motor housing of the motor body 100, one end of the connecting rod is hinged to a first hinge protrusion disposed on the outer circumferential surface of the fixing cylinder 2111, the other end of the connecting rod is hinged to the bracket 2121, core lines of the two hinge shafts are parallel to a tangential direction of a corresponding point on the output shaft 110, the connecting rods are axially provided with two groups of connecting rods one 2122 and two groups of connecting rods two 2123 located on one side of the connecting rod one 2122 facing the power output end of the output shaft 110, and the connecting rods one 2122 and the connecting rods two groups of connecting rods 212.

One end of the first push-pull rod 2124 is hinged to the second hinge protrusion arranged on the outer circular surface of the pulling cylinder 2112, the other end of the first push-pull rod 2122 is hinged to the first connecting rod 2122, core lines of the two hinge shafts are parallel to the tangential direction of a corresponding point on the output shaft 110, an avoidance groove is formed in the hinge point between the first push-pull rod 2124 and the first connecting rod 2122, the second connecting rod 2123 and the first push-pull rod 2124 are located in the same plane.

The coil 120 is fixedly mounted on the bracket 2121, a plurality of groups of coils 120 are arranged in an array along the circumferential direction of the output shaft 110, a plurality of groups of coil mounting elements 2120 are arranged in a corresponding array, and a plurality of groups of first hinge protrusions arranged on the outer circular surface of the fixed cylinder 2111 and a plurality of groups of second hinge protrusions arranged on the outer circular surface of the pulling cylinder 2112 are arranged in a corresponding array.

When the pulling cylinder 2112 is displaced along the axial direction of the output shaft 110, the bracket 2121 can move closer to/away from the output shaft 110 by the cooperation of the first push-pull rod 2124, the first connecting rod 2122 and the second connecting rod 2123, i.e., the distance between the coil 120 and the output shaft 110 is changed.

The magnet mounting member 220 is located on the side of the coil drawing member 2110 facing away from the power output end of the output shaft 110, and the magnet mounting member 220 comprises a magnet drawing member 2210 and a magnet mounting member 2220.

The magnet pulling piece 2210 comprises an installation cylinder 2211 and a connecting cylinder 2212 which are of a circular ring structure, the installation cylinder 2211 is coaxially and fixedly installed on the outer portion of the output shaft 110, the connecting cylinder 2212 is located on one side, deviating from the power output end of the output shaft 110, of the installation cylinder 2211, the connecting cylinder 2212 is coaxially and movably sleeved on the outer portion of the output shaft 110, the connecting cylinder 2212 can move along the axial direction of the output shaft 110, a first connecting protrusion is arranged on the outer circular surface of the installation cylinder 2211, and a second connecting protrusion is arranged on the outer circular surface of the connecting cylinder 2212.

The magnet mounting part 2220 includes a mounting plate 2221, two support rods 2224, and a push-pull rod 2224, wherein the mounting plate 2221 is located between the coil 120 and the output shaft 110, one end of each support rod is hinged to a first connecting protrusion arranged on the outer circumferential surface of the mounting cylinder 2211, the other end of each support rod is hinged to the mounting plate 2221, core lines of the two hinge shafts are parallel to the tangential direction of the corresponding point on the output shaft 110, the two support rods are axially arranged along the output shaft 110 and are respectively a first support rod 2222 and a second support rod 2223 located between the first support rod 2222 and the coil pulling part 2110, and the first support rod 2222 and the second support rod 2223 are parallel.

One end of the second push-pull rod 2224 is hinged to the second connecting protrusion arranged on the outer circumferential surface of the connecting cylinder 2212, the other end of the second push-pull rod 2224 is hinged to the first support rod 2222, core lines of the two hinged shafts are parallel to the tangential direction of the corresponding point on the output shaft 110, a sliding groove is arranged at the hinged point between the second push-pull rod 2224 and the first support rod 2222, the second support rod 2223 and the second push-pull rod 2224 are all located in the same plane.

Permanent magnet 130 fixed mounting on mounting panel 2221, permanent magnet 130 be provided with a plurality of groups and magnet installed part 2220 has a plurality of groups corresponding to the array along the circumferencial direction array of output shaft 110 to set up in the protruding one of the connection of the outer disc of installation cylinder 2211, set up in the protruding two of the connection of the outer disc of connecting cylinder 2212 and all correspond the array and have a plurality of groups.

When the connecting cylinder 2212 is displaced along the axial direction of the output shaft 110, the mounting plate 2221 can move closer to or away from the output shaft 110 by the cooperation of the second push-pull rod 2224, the first support rod 2222 and the second support rod 2223, that is, the distance between the permanent magnet 130 and the output shaft 110 is changed.

A pulling member 400 is provided between the magnet pulling member 2210 and the coil pulling member 2110, and the magnet pulling member 2210 and the coil pulling member 2110 are pulled and linked by the pulling member 400.

The end surface of the pulling cylinder 2112 departing from the power output end of the output shaft 110 is coaxially provided with a rotating sleeve 2113, and the outer circular surface of the rotating sleeve 2113 is coaxially provided with a rotating groove 2114 in a ring groove structure.

The outer circular surface of the mounting cylinder 2111 is provided with a key groove penetrating through the axial thickness of the mounting cylinder.

The traction piece 400 comprises a fixed rod 410 and an insert block 420, the insert block 420 is arranged in the rotating groove 2114, the insert block 420 is of an arc block structure which is coaxial with the rotating groove 2114, the extending direction of the fixed rod 410 is parallel to the axial direction of the output shaft 110, one end of the fixed rod 410 is fixedly connected with the connecting cylinder 2212, and the other end of the fixed rod 410 penetrates through the key slot and is fixedly connected with the insert block 420.

The traction member 400 is provided with a plurality of groups along the circumferential direction of the output shaft 110, and the groups of the mosaic blocks 420 are spliced together to form a mosaic ring of a complete circular ring structure coaxially arranged with the rotating groove 2114, and the mosaic ring and the rotating groove 2114 form a rotating fit.

When the connecting cylinder 2212 is displaced along the axial direction of the output shaft 110, the connecting cylinder can pull the pulling cylinder 2112 to be synchronously displaced through the pulling piece 400; in addition, the mounting cylinder 2111 rotates and pulls the connector cylinder 2212 in synchronous rotation, and the pulling cylinder 2112 is not affected by the rotation of the connector cylinder 2212.

The adjusting mechanism 300 is located on a side of the magnet pulling piece 2210 facing away from the power output end of the output shaft 110, the adjusting mechanism 300 includes a controller, an adjusting motor 310 and a push-pull member 320, the adjusting motor 310 is used for providing power for the operation of the push-pull member 320, the push-pull member 320 is used for pulling the connecting cylinder 2112 to displace along the axial direction of the output shaft 110, and the controller is used for a user to manually control the opening and closing of the adjusting motor 310.

The adjusting motor 310 is fixed on the motor housing of the motor main body 100, and the adjusting motor 310 and the motor main body 100 are coaxially arranged, and the power output end of the adjusting motor 310 extends into the motor main body 100.

The push-pull component 320 comprises an installation disc, a push-pull sleeve 321, a push-pull screw rod 322 and a gear transmission group, the installation disc is coaxially and movably installed outside the output shaft 110 through a bearing, the axial direction of the push-pull screw rod 322 is parallel to the axial direction of the output shaft 110, the push-pull screw rod 322 is movably installed on the installation disc, two ends of the push-pull screw rod 322 are respectively located on one side of the installation disc, and three groups of the push-pull screw rod 322 are arranged in an array mode in the circumferential direction of the installation.

The end face of the connecting cylinder 2112, which is far away from the power output end of the output shaft 110, is coaxially provided with an installation sleeve 2213, the push-pull sleeve 321 is coaxially and movably installed outside the installation sleeve 2213, the push-pull sleeve 321 and the installation sleeve 2213 form a rotating fit, the push-pull sleeve 321 is further installed between a nut and the push-pull screw rod 322, three groups of nuts are correspondingly arranged, and the push-pull screw rod 322 rotates and pulls the push-pull sleeve 321 to displace along the axial direction of the output shaft 110.

The gear transmission set comprises a driving spur gear 324 and a driven spur gear 323, the driving spur gear 324 is coaxially and fixedly installed outside the power output end of the adjusting motor 310, the driven spur gear 323 is coaxially and fixedly installed outside the push-pull screw rod 322, three groups of driven spur gears 323 are correspondingly arranged, and the driving spur gear 324 is meshed with the driven spur gear 323.

The user can manually control the opening and closing of the adjustment motor 310 through the controller, so as to determine the distance of the push-pull sleeve 321 to displace along the axial direction of the output shaft 110, and the push-pull sleeve 321 displaces and pulls the connecting cylinder 2212 to displace synchronously.

During actual operation, after the motor main body 100 is powered on, the coil 120 is fixed, the permanent magnet 130/the magnet mounting member 220/the output shaft 110 start to rotate under the action of ampere force, and then a user can operate the opening and closing of the adjusting mechanism 300 according to actual conditions, so that the torque of the output shaft 110 is changed, and the specific process is as follows:

a user manually controls and adjusts the opening and closing of the motor 310 through a controller, so as to determine the distance of the push-pull sleeve 321 which displaces along the axial direction of the output shaft 110, the push-pull sleeve 321 displaces and pulls the connecting cylinder 2212 to synchronously displace, the connecting cylinder 2212 displaces along the axial direction of the output shaft 110 and pulls the pull cylinder 2112 to synchronously displace through the pulling piece 400, when the connecting cylinder 2212 displaces along the axial direction of the output shaft 110, the connecting cylinder 2221 can move close to or away from the output shaft 110 through the matching among the push-pull rod two 2224, the supporting rod one 2222 and the supporting rod two 2223, namely, the distance between the permanent magnet 130 and the output shaft 110 is changed, when the pull cylinder 2112 displaces along the axial direction of the output shaft 110, the bracket 2121 can move close to or away from the output shaft 110 through the matching among the push-pull rod one 2124, the connecting rod one 2122 and the connecting rod two 2123, specifically, the torque of the output shaft 110 is changed by changing the distance between the coil 120 and the output shaft 110, and specifically, the torque and the rotating speed are in inverse proportion, so that the torque of the output shaft 110 is reduced/increased by reducing/increasing the distance between the coil 120/the permanent magnet 130 and the output shaft 110, so that the output rotating speed of the output shaft 110 is increased/reduced under the same power condition, the former condition can be used for increasing the output rotating speed after the motor body is started to work, and the latter condition can be used for shortening the time required for reducing the rotating speed to zero when the motor body stops running.