CN210183113U

CN210183113U - Direct-drive hub motor of wheelchair

Info

Publication number: CN210183113U
Application number: CN201920814255.XU
Authority: CN
Inventors: Moran Zhang; 张墨染; dalian Tang; 唐达联; Xu Ke; 柯旭
Original assignee: Nanjing Kangni Intelligent Technology Co Ltd
Current assignee: Nanjing Kangni Intelligent Technology Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-03-24
Anticipated expiration: 2029-05-31

Abstract

The utility model relates to a direct-drive hub motor of a wheelchair, which comprises a hub, a rotor core, magnetic steel, a supporting seat, a stator, a motor shaft, a fixed plate, a movable plate, a friction plate, a spring, an unlocking handle, a transmission rod and a magnetic brake seat; the stator is connected with the motor shaft to form a stator assembly; the rotor assembly consisting of the wheel hub, the rotor core, the magnetic steel and the supporting seat wheel is rotatably supported on the motor shaft, wherein the rotor core is fixedly connected in the rotor groove; the fixed plate is connected with the magnetic brake seat at an interval of L, the friction plate and the movable plate are axially movably arranged in the interval, the sum of the thicknesses of the friction plate and the movable plate is less than L, and the spring is arranged between the movable plate and the magnetic brake seat; the unlocking handle is sleeved on the motor shaft, a plurality of convex blocks are circumferentially distributed on the unlocking handle, an arc groove hole is formed in the protrusion, a spiral surface is arranged at the upper end of the protrusion, the transmission rod penetrates through the arc groove hole and one end of the magnetic brake seat to be connected with the moving piece, and the other end of the transmission rod is connected with the unlocking handle. Its advantages are high dynamic balance and brake response, and manual release of brake state in power-off state.

Description

Direct-drive hub motor of wheelchair

Technical Field

The invention relates to a direct-drive internal brake motor of a wheelchair.

Background

Most of driving motors adopted by the existing wheelchair are brushless or brushless toothed hub motors, the internal structure is complex, a rotor assembly is formed by mechanically connecting a plurality of parts, the whole consistency is poor, the rotating balance is influenced, and the braking part is completed by depending on an external mechanical brake structure, such as a disc brake, a servo brake, a drum brake and the like, and the vehicle braking is realized by matching a brake cable and a manual brake lever. The brake mode has long transmission line and relatively complex structure, and moreover, the brake part is exposed, so that the abrasion of the corresponding brake element is caused during the entering period of dust and silt, and the brake effect is weakened; at the same time, some manipulations of the operating parts can produce some actions which are not required or even unsafe, such as manual brake handles, and wheels can rotate freely when being loosened, so that the vehicle slips; in addition, the brake crank and the brake cable are wired to influence the appearance of the whole vehicle, so that the aesthetic feeling of the modern whole vehicle is not possessed, the space of the whole vehicle is occupied, and the comprehensive cost is high.

Disclosure of Invention

The invention aims to provide a direct-drive hub motor of a wheelchair, which has the advantages that the rotor assembly has good rotating balance, the internal magnetic brake function is realized, the manual brake unlocking function is realized under the condition of power failure, the structure is simple, and the whole wheelchair is more attractive. The specific technical scheme is as follows:

the direct-drive hub motor of the wheelchair comprises: the device comprises a hub, a rotor core, magnetic steel, a supporting seat, a stator, a winding, a motor shaft, a stator plate, a moving plate, a friction plate, a spring, an unlocking handle, a transmission rod and a magnetic brake seat provided with a coil; the stator is connected to the motor shaft in a non-rotating mode in the circumferential direction, and the windings are arranged at two axial ends of the stator; the rotor assembly is characterized in that a rotor groove is formed in one axial end of the hub, the rotor core and the magnetic steel are both annular, the rotor core is fixedly connected to the annular wall surface of the rotor groove, the magnetic steel is connected to the inner annular surface of the rotor core, the hub, the rotor core and the magnetic steel form a rotating body, the supporting seat is connected to the rotating body corresponding to the opening end of the rotor groove, and therefore the rotor assembly is formed, the rotor assembly is rotatably supported on the motor shaft, and the stator is located in the inner annular surface of the; the magnetic brake seat is connected to a motor shaft, the fixed plate is connected to the magnetic brake seat and has an axial distance L with the magnetic brake seat, the friction plate and the moving plate are axially movably arranged in the distance, the sum of the thicknesses of the friction plate and the moving plate is less than L, the friction plate is not in relative rotation connection with the supporting seat, and the plurality of springs are arranged between the moving plate and the magnetic brake seat; the unlocking handle is sleeved on the motor shaft, a plurality of convex blocks are circumferentially distributed on the unlocking handle, a spiral surface is arranged at the upper end of each convex block, each convex block is provided with an arc groove hole matched with the spiral radius of the spiral surface, the transmission rod penetrates through the arc groove holes and one end of the magnetic brake seat to be connected with the movable plate, the other end of the transmission rod is connected with the unlocking handle, the unlocking handle rotates around the motor shaft, and the connecting end of the transmission rod and the unlocking handle moves relative to the spiral surface to enable the transmission rod.

The further design is that:

the hub is characterized in that the rotor core is fixedly connected to the annular wall surface of the rotor groove of the hub in a casting mode.

The annular wall surface of the rotor groove is provided with a raised ring, the circumferential side surface of the rotor core is provided with an annular groove matched with the raised ring, and the rotor core is axially and fixedly connected to the annular wall surface of the rotor groove in a limiting manner through the matching of the circular groove and the raised ring.

The rotor assembly is rotatably supported on the motor shaft through bearings arranged on the hub and the supporting seat.

The direct-drive hub motor of the wheelchair further comprises a motor end cover, the motor end cover is connected to the stator, a leading-out hole is formed in the position, corresponding to the unlocking handle, of the motor end cover, and the unlocking handle extends out of the motor end cover through the leading-out hole.

The unblock handle includes ring shape connecting portion and connects the rod-shaped operation portion in connecting portion one side, and the unblock handle cup joints in the motor shaft through the hole at connecting portion center, and the protruding equipartition of several rotates the operation portion on a direction of connecting portion, and the unblock handle rotates around the motor shaft.

The moving plate is provided with a plurality of counter bores along the circumferential direction; one end of the transmission rod is provided with a connecting end part matched with the counter bore, the other end of the transmission rod is provided with external threads, one end of the transmission rod is connected with the moving plate through the matching of the connecting end part and the counter bore, one end of the transmission rod is connected with the unlocking handle through a nut which is screwed outside the arc slotted hole, and one end of the nut is abutted against the spiral surface at the upper end of the protrusion.

Nut one end is spherical face, and the nut is contradicted in the helicoid of protruding upper end through spherical face.

One side of the upper end of the spiral surface is provided with a plane connected with the spiral surface, two parallel groove walls corresponding to the arc groove hole on one side of the plane are respectively provided with a positioning groove with a spherical concave surface, and the positioning groove is matched with the spherical surface of the spherical surface at one end of the nut.

The outer side end face of the supporting seat is provided with a polygonal boss, the friction plate is provided with a polygonal hole matched with the polygonal boss, and the friction plate is connected to the supporting seat in a non-relative-rotation mode through the polygonal hole in a sleeved mode with the polygonal boss.

The direct-drive hub motor of the wheelchair has the following beneficial effects:

1) this application makes the motor rotor subassembly of drive wheelchair become the whole that has minimum mechanical connection through the rotor core rigid coupling that will be connected with the magnet steel in wheel hub's rotor recess to make the better dynamic balance nature of having of rotor subassembly.

2) The brake mechanism adopting the electromagnetic mechanism and the magnetic brake seat are powered off, the spring pushes the movable plate out, so that the two end faces of the friction plate are respectively extruded by the fixed plate and the movable plate to form double friction braking, the braking force is large, the formed braking time is short, the large braking force and the quick braking are realized, and the brake mechanism has high brake responsiveness.

3) Through the interaction of the parts such as the unlocking handle, the transmission rod, the spring, the moving plate and the like which are provided with the protrusions, after the motor is braked through power failure, the brake can be released even under the condition of power failure, and the wheelchair can be conveniently moved under the condition of power failure.

4) Because the brake no longer needs brake lever and brake cable, simple structure, compactness, and easily assembly, cost reduction makes whole car structure obtain optimizing and pleasing to the eye.

Drawings

Fig. 1 is a schematic structural view of a direct drive hub motor of embodiment 1.

Fig. 2 is a schematic structural view of a hub in the direct-drive hub motor shown in fig. 1.

Fig. 3 is a schematic structural diagram of a magnetic brake mechanism mainly composed of a fixed plate, a moving plate, a friction plate, a spring and a magnetic brake base in a non-braking state.

Fig. 4 is a schematic structural diagram of the magnetic brake mechanism shown in fig. 3 in a braking state.

Fig. 5 is a schematic structural diagram of a brake unlocking mechanism arranged on the magnetic brake mechanism, wherein the magnetic brake mechanism is in a braking state.

Fig. 6 is a schematic structural view of the brake unlocking mechanism.

Fig. 7 is a partial three-dimensional structural schematic view of the brake release mechanism shown in fig. 6.

Fig. 8 is a cross-sectional view taken along line B-B of the three-dimensional structure of fig. 7.

Fig. 9 is a partially enlarged view of a schematic configuration of the magnetic brake mechanism shown in fig. 5 in which a brake release mechanism is provided.

Fig. 10 is a schematic structural diagram of a brake unlocking mechanism arranged on the magnetic brake mechanism, wherein the magnetic brake mechanism is in a braking state.

Fig. 11 is a partially enlarged view of a schematic configuration of the magnetic brake mechanism shown in fig. 1 in which a brake release mechanism is provided.

Fig. 12 is a cross-sectional view at the C-C position of the three-dimensional structure shown in fig. 7.

Fig. 13 is a sectional view taken along line a-a of fig. 1.

Fig. 14 is a schematic structural view of a direct drive hub motor of embodiment 2.

Fig. 15 is a schematic view of the structure of the hub of the direct drive hub motor shown in fig. 14.

Fig. 16 is a schematic structural view of a rotor core in the direct drive hub motor shown in fig. 14.

Fig. 17 is a schematic view of the transmission rod in embodiment 2.

Detailed Description

The invention is further explained below with reference to the drawings and the embodiments.

Example 1

As shown in fig. 1, the motor of the present embodiment mainly includes a hub 10, a rotor core 11, a magnetic steel 12, a supporting seat 13, a stator 21, a winding 22, a motor shaft 20, a stator plate 31, a rotor plate 32, a friction plate 35, a spring 33, a magnetic brake seat 34, an unlocking handle 40, and a transmission rod 43.

The stator 21 is connected to the motor shaft 20 and is non-rotatably connected to the motor shaft in the circumferential direction by a key 24, and the windings 22 are provided at both ends of the stator in the axial direction, whereby the stator 21, the windings 22 and the motor shaft 20 constitute a stator assembly.

As shown in fig. 2, a rotor groove 101 is formed at one axial end of the hub 10, the rotor core 11 and the magnetic steel 12 are both circular, and the rotor core is fixedly connected to a circular wall surface of the rotor groove of the hub by casting, and the magnetic steel is fixedly connected to an inner circular ring surface of the rotor core, so that the hub 1, the rotor core and the magnetic steel form a rotating body, the supporting seat 13 is connected to the rotating body corresponding to the opening end of the rotor groove, and the supporting seat 13 of the embodiment is sleeved with the motor shaft 20 and is connected to a corresponding end surface of the rotor core 11 by screws. Of course, as long as the radial dimension of the corresponding end face of the supporting seat 13 is made large enough, the supporting seat can also be connected to the corresponding end face of the hub 10, so that the rotor assembly is composed of the rotor and the supporting seat 13, the rotor assembly is rotatably supported on the motor shaft 20 through the bearings 21 respectively arranged on the hub 10 and the supporting seat 13, the stator 21 is located in the inner ring of the magnetic steel 12, and the rotor assembly rotates relative to the stator assembly.

In order to brake the rotor assembly rotatable about the motor shaft 20, a magnetic brake mechanism is provided, which is composed of a stator plate 31, a rotor plate 32, a friction plate 35, a spring 33, and a magnetic brake base 34, as shown in fig. 3. The magnetic brake mechanism is arranged on one side of the outer side of the supporting seat 13, a magnetic brake seat 34 is connected to the motor shaft 20 through a key 36, and a stator 31 is connected to one side of the magnetic brake seat in the axial direction through a spacer 37 with the length of L, so that the axial distance between the stator and the magnetic brake seat is L. The friction plate 35 and the movable plate 32 are axially movably arranged in the distance, and the center of the friction plate 35 is provided with a polygonal hole which is sleeved on a corresponding polygonal boss 131 extending out of the supporting seat 13 towards one side of the friction plate, so that the friction plate is connected to the supporting seat in a non-relative rotating manner. The sum of the thicknesses of the friction plate 35 and the moving plate 32 is smaller than L, namely, a gap delta exists between the fixed plate 31 and the magnetic brake seat 34 after the friction plate 35 and the moving plate 32 are placed. The moving plate 32 is sleeved on the motor shaft 20, and three springs 33 are arranged between the moving plate and the magnetic brake base to elastically connect the moving plate and the magnetic brake base. The magnetic brake seat 34 is provided with a coil 341, the coil is energized when the motor normally works, the energized coil 341 generates a magnetic force opposite to the direction of the spring force, the magnetic force acts on the movable plate 32, the movable plate 32 can overcome the spring force of the spring 33 separating the movable plate from the magnetic brake seat and is attached to the corresponding end of the magnetic brake seat, and therefore a gap exists between the friction plate 35 and the fixed plate 31, and the maximum gap is the gap delta. If the wheelchair needs to be braked, the coil 341 is powered off at this moment, the movable plate 32 is only under the action of the elastic force of the spring 33, the spring force pushes the movable plate away from the magnetic brake seat 34 to generate a gap delta, as shown in fig. 4, the friction plate 35 is tightly attached to the fixed plate 31 under the pushing of the movable plate 32, so that the two sides of the friction plate rotating along with the supporting seat 34 are respectively pushed by the fixed plate 31 and the movable plate 32 which do not rotate, the rotation of the friction plate is braked, and the rotation of the supporting seat connected with the friction plate and the corresponding rotating body is braked.

The invention also solves the problem that the wheelchair is manually released from the braked state through the brake unlocking mechanism under the condition of power failure. As shown in fig. 5-8, the brake unlocking mechanism mainly comprises an unlocking handle 40 and a transmission rod 43, the unlocking handle 40 of this embodiment includes a circular ring-shaped connecting portion 401 and a rod-shaped operating portion 402 connected to one side of the connecting portion, the unlocking handle 40 is sleeved on the motor shaft 20 through a hole 4011 in the center of the connecting portion, three protrusions 41 are uniformly distributed in a circumferential direction of the connecting portion, a spiral surface 411 with a spiral radius R is arranged at the upper end of each protrusion, each protrusion is provided with an arc slot hole 44 matched with the spiral radius of the spiral surface, the transmission rod 42 passes through the arc slot hole 44 and a through hole 347 on the magnetic brake base 34, one end of the transmission rod is connected with the moving plate 32, and the other.

In order to facilitate the connection between the moving plate and the transmission rod, as shown in fig. 5 and 9, a plurality of counter bores 321 are uniformly distributed on the moving plate 32 in the circumferential direction, and the corresponding end of the transmission rod 43 is provided with a connecting end portion 431 of a shaft shoulder structure adapted to the counter bores, and is connected with the moving plate in an axial limiting manner through the matching of the connecting end portion and the counter bores. The other end of the transmission rod 43 is provided with an external thread, and the transmission rod 43 is connected with the unlocking handle 40 through a screw nut 42 which extends out of the arc slotted hole 44 through the end. Because the spring 33 is provided between the moving plate and the magnetic brake seat 34, one end of the nut 42 is elastically pressed against the spiral surface at the upper end of the protrusion, namely against the circular arc slot 44 on the spiral surface. The nut 42 of the present embodiment has a spherical surface 421 at one end, and the spherical surface 421 abuts against the spiral surface, thereby reducing the contact surface with the spiral surface and reducing the frictional force. When the operating portion 402 of the unlocking handle is rotated around the motor shaft, the screw surface 411 at the upper end of the protrusion is raised or lowered relative to the nut 42 connected to the transmission rod, and the screw surface drives the transmission rod to move axially by pushing the nut 42. When the magnetic brake mechanism is in a braking state, the coil in the magnetic brake seat 34 is powered off, the spring 33 makes a gap delta between the moving plate 32 and the magnetic brake seat 34, no gap exists between the friction plate and the fixed plate, no gap exists between the friction plate and the moving plate, the two sides are clamped by the fixed plate and the moving plate, and the nut 42 is located at the lower end ab position of the spiral surface 411. When the braking state needs to be unlocked, the operating part 402 of the unlocking handle is rotated, the spiral surface 411 abutting against the nut 42 is gradually lifted, the nut 42 is pushed by the spiral surface 411 to lift to the cd position, as shown in fig. 10 and 11, the transmission rod is moved to the right side to drive the movable plate to move to the right side until the movable plate is attached to the corresponding end of the magnetic brake seat 34, and a gap is reserved between the friction plate and the fixed plate and between the friction plate and the movable plate, so that the braking state of the wheelchair is eliminated.

Since the nut 42 at the connecting end of the transmission rod 43 and the unlocking handle 40 is at the high position of the spiral surface in the non-braking state, in order to ensure the stability at the position, a plane 412 connected with the spiral surface is arranged at one side of the upper end of the spiral surface 411, and positioning grooves 413 with spherical concave surfaces are respectively arranged on two parallel groove walls of the circular arc groove hole corresponding to one side of the plane, referring to fig. 7 and 12, the positioning grooves are matched with the spherical surface at one end of the nut, and the curvature diameter D of the spherical concave surfaces is larger than the groove width K of the circular arc groove hole 44. The spiral surface 411 enables the transmission rod to move outwards by pushing the nut 42 through rotating the unlocking handle around the motor shaft, when the highest position of the spiral surface is reached, the unlocking handle 40 continues to rotate, the transmission rod 43 slides into the positioning groove 413 quickly under the action of the spring 33 and through the spherical surface on the screwing nut 42, and the possibility that the transmission rod slides along the arc groove hole 44 is blocked because the width K of the arc groove hole is smaller than the curvature diameter D of the positioning groove 413, so that the corresponding end of the transmission rod is stabilized in the positioning groove.

The end cover 30 is arranged on one side of the direct-drive hub motor corresponding to the magnetic brake mechanism, the end cover 30 contains the magnetic brake mechanism and the brake unlocking mechanism and is connected to the stator 31 through a screw, and the leading-out hole 301 (see fig. 4 and 10) is arranged at the position of the rod-shaped operating part 402 corresponding to the unlocking handle, so that the leading-out hole extends out of the motor end cover.

The magnetic brake seat 34, the moving plate 32 and the fixed plate 31 are further designed as shown in fig. 13, a spring hole 346 is formed in the magnetic brake seat 34, the spring 33 between the magnetic brake seat 34 and the moving plate 32 is disposed in the spring hole 346, one end of the spring abuts against the bottom of the hole, and the other end of the spring extends out of the hole and abuts against the moving plate 32. The magnetic brake seat 34 is connected with the stator 31 through a screw 344, and the screw 344 is sleeved with the spacer 37, so that a screw hole 345 is arranged on the magnetic brake seat 34, and a through hole 347 for a transmission rod to pass through is also arranged on the magnetic brake seat 34. Therefore, the magnetic brake seat of the embodiment is provided with the screw holes 345, the spring holes 346 and the through holes 347 which are sequentially and circularly arranged in the circumferential direction, and all the holes are uniformly distributed in the circumferential direction. The movable plate 32 is provided with a through notch 321 corresponding to the screw hole 345, so that the spacer 37 is positioned between the fixed plate 31 and the magnetic brake seat 34 through the notch 321.

Example 2

As shown in fig. 14, the motor of the present embodiment is different from the above-mentioned embodiment 1 in that the structure of the hub and the rotor core is slightly different, as shown in fig. 15 and 16, a protruding ring 102 is provided on the circular ring-shaped wall surface of a rotor groove 101 on the hub 10, an annular groove 111 adapted to the protruding ring 102 is provided on the circumferential side surface of the rotor core 11, and the two are fixedly connected into a whole by casting, and actually, the rotor groove 101 on the hub is produced during casting. The hub and the rotor core are axially limited by the matching of the convex ring 102 and the annular groove 111, and the rotor core cannot axially move even if the casting joint surfaces of the hub and the rotor core are separated due to long-term vibration. Therefore, the structure of the mutual combination of the hub and the rotor core of the embodiment enables the rotor assembly to have the least connecting parts, and the whole structure is good, so that the rotation balance is good.

In addition, the driving rod 43 in this embodiment is slightly different from the embodiment 1, as shown in fig. 17, two ends of the driving rod are respectively provided with an external thread, the driving rod 43 passes through the through hole 347 on the magnetic brake seat 34, one end of the driving rod is located in the counterbore 321 of the rotor 32, and is screwed with the nut 432, the nut 432 is adapted to the counterbore, the counterbore is not exposed outside, and the counterbore is embedded in the hole, which is a stepped hole in this embodiment. The other end of the transmission rod 43 extends out of the arc slot 44 and is screwed with a nut 42 with a spherical surface, and the spherical surface on the nut 42 is abutted against the spiral surface 483 at the upper end of the bulge.

Other structures and working principles of the motor of the embodiment are completely the same as those of the embodiment, and are not described in detail.

Claims

1. Wheel chair's directly drives in-wheel motor, its characterized in that: the device comprises a hub, a rotor core, magnetic steel, a supporting seat, a stator, a winding, a motor shaft, a stator plate, a moving plate, a friction plate, a spring, an unlocking handle, a transmission rod and a magnetic brake seat provided with a coil; the stator is connected to the motor shaft in a non-rotating mode in the circumferential direction, and the windings are arranged at two axial ends of the stator; the rotor assembly is characterized in that a rotor groove is formed in one axial end of the hub, the rotor core and the magnetic steel are both annular, the rotor core is fixedly connected to the annular wall surface of the rotor groove, the magnetic steel is connected to the inner annular surface of the rotor core, the hub, the rotor core and the magnetic steel form a rotating body, the supporting seat is connected to the rotating body corresponding to the opening end of the rotor groove, and therefore the rotor assembly is formed, the rotor assembly is rotatably supported on the motor shaft, and the stator is located in the inner annular surface of the; the magnetic brake seat is connected to a motor shaft, the fixed plate is connected to the magnetic brake seat and has an axial distance L with the magnetic brake seat, the friction plate and the moving plate are axially movably arranged in the distance, the sum of the thicknesses of the friction plate and the moving plate is less than L, the friction plate is not in relative rotation connection with the supporting seat, and the plurality of springs are arranged between the moving plate and the magnetic brake seat; the unlocking handle is sleeved on the motor shaft, a plurality of convex blocks are circumferentially distributed on the unlocking handle, a spiral surface is arranged at the upper end of each convex block, each convex block is provided with an arc groove hole matched with the spiral radius of the spiral surface, the transmission rod penetrates through the arc groove holes and one end of the magnetic brake seat to be connected with the movable plate, the other end of the transmission rod is connected with the unlocking handle, the unlocking handle rotates around the motor shaft, and the connecting end of the transmission rod and the unlocking handle moves relative to the spiral surface to enable the transmission rod.

2. The direct drive hub motor of a wheelchair of claim 1, wherein: the hub is characterized in that the rotor core is fixedly connected to the annular wall surface of the rotor groove of the hub in a casting mode.

3. The direct drive hub motor of the wheelchair vehicle as claimed in claim 2, wherein: the annular wall surface of the rotor groove is provided with a raised ring, the circumferential side surface of the rotor core is provided with an annular groove matched with the raised ring, and the rotor core is axially and fixedly connected to the annular wall surface of the rotor groove in a limiting manner through the matching of the circular groove and the raised ring.

4. The direct drive hub motor of a wheelchair of claim 1, wherein: the rotor assembly is rotatably supported on the motor shaft through bearings arranged on the hub and the supporting seat.

5. The direct drive hub motor of a wheelchair of claim 1, wherein: the direct-drive hub motor of the wheelchair further comprises a motor end cover, the motor end cover is connected to the stator, a leading-out hole is formed in the position, corresponding to the unlocking handle, of the motor end cover, and the unlocking handle extends out of the motor end cover through the leading-out hole.

6. The direct drive hub motor of a wheelchair of claim 5, wherein: the unblock handle includes ring shape connecting portion and connects the rod-shaped operation portion in connecting portion one side, and the unblock handle cup joints in the motor shaft through the hole at connecting portion center, and the protruding equipartition of several rotates the operation portion on a direction of connecting portion, and the unblock handle rotates around the motor shaft.

7. The direct drive hub motor of the wheelchair vehicle as claimed in claim 6, wherein: the moving plate is provided with a plurality of counter bores along the circumferential direction; one end of the transmission rod is provided with a connecting end part matched with the counter bore, the other end of the transmission rod is provided with external threads, one end of the transmission rod is connected with the moving plate through the matching of the connecting end part and the counter bore, one end of the transmission rod is connected with the unlocking handle through a nut which is screwed outside the arc slotted hole, and one end of the nut is abutted against the spiral surface at the upper end of the protrusion.

8. The direct drive hub motor of a wheelchair of claim 7, wherein: nut one end is spherical face, and the nut is contradicted in the helicoid of protruding upper end through spherical face.

9. The direct drive hub motor of a wheelchair of claim 8, wherein: one side of the upper end of the spiral surface is provided with a plane connected with the spiral surface, two parallel groove walls corresponding to the arc groove hole on one side of the plane are respectively provided with a positioning groove with a spherical concave surface, and the positioning groove is matched with the spherical surface of the spherical surface at one end of the nut.

10. The direct drive hub motor of a wheelchair of claim 1, wherein: the outer side end face of the supporting seat is provided with a polygonal boss, the friction plate is provided with a polygonal hole matched with the polygonal boss, and the friction plate is connected to the supporting seat in a non-relative-rotation mode through the polygonal hole in a sleeved mode with the polygonal boss.