Unilateral shaft external rotor motor

Abstract

The utility model discloses a unilateral shaft outer rotor motor, which comprises a shell, an outer end cover, a shaft, a flange plate, an armature, a friction plate, a handle, an upper pressure plate, an electromagnet valve body, a reset spring, a second screw rod, a steel ball and a control module, the shell and the driving inner end cover are both rotationally installed on the shaft, and the outer end cover is fixedly installed at the outer end of the shell. Due to the fact that the running speed of the wheelchair is not high, the electromagnetic brake is arranged in the single-side-shaft outer rotor motor, the magnetic force of the electromagnet valve body is linearly decreased progressively by controlling the microswitch, under the action of the reset spring, the armature gradually reduces the rotating speed of the friction plate and the driving inner end cover through friction force, and the speed reducing and braking effects are achieved. The wheelchair does not need to be provided with a traditional mechanical brake structure. In addition, the armature can be separated from the friction plate in an external mechanical mode, and the wheelchair can be pushed to move in a power-off state.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wheel hub motor, especially is involved in a single side axle outer rotor motor for wheelchair car. BACKGROUND

[0002] Wheel hub motor is a kind of driving system that integrates motor directly in wheel hub, is widely used in electric vehicle, electric bicycle, electric motorcycle, wheelchair and other traffic tools.It integrates motor, speed reducer, controller and other components in the wheel hub, simplifies the transmission system of traditional vehicle, has compact structure, high efficiency, fast response and other advantages.Wheel hub motor is used on wheelchair, and traditional mechanical brake structure is used to brake and stop it, and traditional mechanical brake structure does not have the function of automatic braking when parking. SUMMARY

[0003] The utility model wants to solve the technical problem of improving a kind of single side axle outer rotor motor, which is braked and stopped by electromagnetic brake for wheelchair, and automatic braking can be realized when parking.

[0004] In order to solve the above technical problem, the present application is realized by the following technical scheme: a single side axle outer rotor motor, including shell, outer end cover, shaft, flange plate, armature, friction plate, handle, upper pressure disc, electromagnet valve body, reset spring, second screw rod, steel ball and control module, the shell is integrally formed with wheel hub, the driving inner end cover is fixedly installed in the shell, the shell and the driving inner end cover are rotatably installed on the shaft, the outer end cover is fixedly installed on the outer end of the shell, the electromagnet valve body is rotatably installed in the outer end cover by ball bearing, the flange plate, armature, friction plate and handle are gap sleeve installed on the shaft, the upper pressure disc and the electromagnet valve body are fixed sleeve installed on the shaft, the flange plate is fixedly installed on the electromagnet valve body by first bolt, the friction plate is located between the flange plate and the armature, the outer edge of the friction plate and the inner edge of the driving inner end cover are arranged with limit protrusions and limit grooves in ring array around the central axis of the shaft, the limit protrusions are embedded in the limit grooves, the left end face of the electromagnet valve body is provided with spring groove, the reset spring is installed in the spring groove, the outer end of the reset spring acts on the armature, the right end face of the electromagnet valve body is provided with high-low groove, the left end face of the handle is provided with semispherical notch corresponding to the high-low groove, the steel ball is embedded in the high-low groove and semispherical notch, the second screw rod is slidably threaded with the handle and fixedly connected with the armature and the electromagnet valve body, the end of the second screw rod is pressed on the armature, and the upper pressure disc limits the limit position of the handle moving to the right.

[0005] Preferably, the electromagnet valve body is fixedly installed with a microswitch, and the microswitch and the electromagnet valve body are connected to the control module through a circuit.

[0006] Preferably, a waterproof cover is fixedly installed on the outer end cover, and the handle, the upper pressing disc, the electromagnet valve body, the steel ball and the micro switch are located in the waterproof cover.

[0007] Preferably, a switch button for pressing the micro switch button is fixedly installed on the waterproof cover.

[0008] Preferably, a manual release rod is fixedly installed on the handle, the handle extends to outside of the waterproof cover, and a stroke hole for rotary operation of the manual release rod is arranged on the waterproof cover.

[0009] Preferably, the limiting protrusion and the limiting groove are arranged in a dovetail-shaped anti-disengagement structure.

[0010] Preferably, the high-low grooves and the semispherical notches are arranged in three groups in a ring array around the central axis of the shaft.

[0011] Compared with the prior art, the utility model has the advantages that: since the wheelchair travels at a low speed, the unilateral shaft outer rotor motor is provided with an electromagnet brake, the magnetic force of the electromagnet valve body is linearly decreased by controlling the micro switch, under the action of the return spring, the armature gradually reduces the rotating speed of the friction plate and the driving inner end cover through the friction force, the speed reduction brake effect is realized, and the wheelchair does not need to be provided with a traditional mechanical brake structure. The armature and the friction plate can be separated through an external mechanical mode, and the wheelchair can also be pushed in a non-electric state. BRIEF DESCRIPTION OF DRAWINGS

[0012] The utility model will be further explained in connection with the drawings.

[0013] Figure 1 is a perspective view of the utility model.

[0014] Figure 2 is a front view of the utility model.

[0015] Figure 3 is Figure 2 A-A sectional view of the utility model.

[0016] Figure 4 is a perspective view of the electromagnet brake.

[0017] Figure 5 is a front view of the electromagnet brake.

[0018] Figure 6 is a perspective view of the driving inner end cover.

[0019] Figure 7 is an installation structure diagram of the driving inner end cover and the friction plate.

[0020] Figure 8 is a front perspective view of the electromagnet valve body.

[0021] Figure 9 This is a 3D view of the back of the electromagnet valve body. Detailed Implementation

[0022] The present invention will now be described in detail with reference to specific embodiments:

[0023] like Figures 1 to 9 The single-shaft external rotor motor shown includes a housing 1, an outer end cover 2, a shaft 3, a flange 4, an armature 5, a friction plate 6, a handle 7, an upper pressure plate 8, an electromagnet valve body 9, a return spring, a second screw 101, steel balls 10, and a control module. A hub 11 is integrally formed on the housing 1. A drive inner end cover 13 is fixedly installed inside the housing 1. Both the housing 1 and the drive inner end cover 13 are rotatably mounted on the shaft 3. The outer end cover 2 is fixedly installed on the outer end of the housing 1. The electromagnet valve body 9 is rotatably mounted inside the outer end cover 2 via ball bearings. The flange 4, armature 5, friction plate 6, and handle 7 are all loosely fitted onto the shaft 3. The upper pressure plate 8 and electromagnet valve body 9 are both fixedly fitted onto the shaft 3. The flange 4 is fixedly mounted onto the electromagnet valve body 9 by a first bolt 41. The friction plate 6 is located between the flange 4 and the armature. Between 5, the outer edge of the friction plate 6 and the inner edge of the drive inner end cover 13 are arranged in a ring array with the central axis of shaft 3 as the center, with limiting protrusions 61 and limiting grooves 131. The limiting protrusions 61 are embedded in the limiting grooves 131. The left end face of the electromagnet valve body 9 is provided with a spring groove 92. The return spring is installed in the spring groove 92. The outer end of the return spring acts on the armature 5. The right end face of the electromagnet valve body 9 is provided with a high-low groove 91. The left end face of the handle 7 is provided with a hemispherical notch corresponding to the high-low groove 91. The steel ball 10 is embedded in the high-low groove 91 and the hemispherical notch. The second screw 101 slides through the armature 5. The electromagnet valve body 9 and the handle 7 are screwed and fixed. The end of the second screw 101 presses against the armature 5. The upper pressure plate 8 limits the extreme position of the handle 7 to move to the right. The flange 4 is placed in the groove of the inner drive end cover 13, and the limiting protrusion 61 of the outer edge of the friction plate 6 extends beyond the flange 4 and assembles with the limiting groove 131 of the inner drive end cover 13. The flange 4, armature 5, friction plate 6, handle 7, upper pressure plate 8, electromagnet valve body 9, return spring, second screw 101, steel ball 10 and control module constitute an electromagnetic brake.

[0024] A micro switch 1001 is fixedly installed on the electromagnet valve body 9. The micro switch 1001 and the electromagnet valve body 9 are connected to the control module through a circuit. Through the cooperation of the micro switch 1001 and the control module, the braking force of the wheelchair can be controlled to avoid sudden braking problems.

[0025] The waterproof cover 21 is fixedly installed on the outer end cover 2, and the handle 7, the upper pressing disc 8, the electromagnet valve body 9, the steel ball 10 and the micro switch 1001 are all located in the waterproof cover 21 to play a protection role.

[0026] The switch button 1002 for pressing the micro switch 1001 is fixedly installed on the waterproof cover 21, and the pressing operation of the micro switch 1001 is facilitated through the switch button 1002.

[0027] The manual release rod 71 is fixedly installed on the handle 7, the handle 7 extends to the outside of the waterproof cover 21, and the waterproof cover 21 is provided with a stroke hole for the rotation operation of the manual release rod 71.

[0028] The limiting protrusion 61 and the limiting groove 131 are matched to be in a dovetail-shaped anti-disengagement structure to prevent the limiting protrusion 61 of the friction plate 6 from being disengaged from the limiting groove 131 in the radial direction.

[0029] The high-low grooves 91 and the semispherical notches are correspondingly arranged in three groups in a ring array with the central axis of the shaft 3 as the center to improve the stability of the handle 7 during rotation.

[0030] The tire 110 is installed on the hub 11, the single-sided shaft outer rotor motor is installed on the wheelchair, and in the driving state of the wheelchair, the rotor 12 in the driving inner end cover 13 is driven to drive the driving inner end cover 13 and the shell 1 to rotate synchronously, the electromagnet valve body 9 is electrified, the electromagnet valve body 9 attracts the armature 5 to move to the right, the armature 5 releases the compression force on the friction plate 6, the friction plate 6 is reset to the right, at this time, the friction plate 6 is not in contact with the flange plate 4 and the armature 5 on both sides, and at this time, the driving inner end cover 13 and the shell 1 rotate under the action of the rotor 12. When the wheelchair is decelerated and braked, the user presses the micro switch 1001 contact, the micro switch 1001 sends an electrical signal to the control module, the micro switch 1001 controls the magnetic force of the electromagnet valve body 9 to linearly decrease, so as to avoid the problem of emergency braking, gradually reduce the attraction force on the armature 5, and gradually move the armature 5 to the left under the action of the reset spring force to press and contact the friction plate 6, limit the rotation of the friction plate 6, reduce the rotating speed of the combination of the friction plate 6, the driving inner end cover 13, the shell 1, the hub 11 and the tire 110, and realize the deceleration and braking of the wheelchair. After the micro switch 1001 is released, the electromagnet valve body 9 restores the magnetic attraction force on the armature 5, the armature 5 and the friction plate 6 are separated, and the friction plate 6 is reset to the right, so that the wheelchair normally drives.

[0031] When the wheelchair is parked, the electromagnet valve body 9 is de-energized, loses the attraction force on the armature 5, and pushes the armature 5 to move to the left under the action of the reset spring force, the armature 5 cooperates with the flange plate 4 to clamp and fix the friction plate 6, plays a role in limiting the rotation of the friction plate 6 and the driving inner end cover 12 and the shell 1, and realizes the automatic brake when parking.

[0032] In the wheelchair voltage is too low or no electricity state, the solenoid valve body 9 can not be energized to start, need to push wheelchair, pull the rotating handle 7, make the steel ball 10 from the high low groove 91 deep place to its shallow place, in the process of steel 10 push handle 7 and the second screw 101 to the right movement, the second screw 101 pull armature 5 to the right movement, make the armature 5 to release the friction plate 6 compression limit force, the friction plate 6 to the right spring back to the original position, release the parking brake state, to facilitate the push.

Claims

1. A single-sided axial external rotor electric machine, characterized by: The utility model provides a kind of electromagnetic valve, including shell (1), outer end cover (2), shaft (3), flange plate (4), armature (5), friction plate (6), handle (7), upper pressure disc (8), electromagnet valve body (9), reset spring, second screw rod (101), steel ball (10) and control module, the wheel hub (11) is integrally formed on the shell (1), driving inner end cover (13) is fixedly installed in the shell (1), the shell (1), driving inner end cover (13) are rotationally installed on shaft (3), the outer end cover (2) is fixedly installed at the outer end of shell (1), the electromagnet valve body (9) is rotationally installed in outer end cover (2) by ball bearing, the flange plate (4), armature (5), friction plate (6), handle (7) are all gap sleeve installation on shaft (3), the upper pressure disc (8), electromagnet valve body (9) are all fixed sleeve installation on shaft (3), the flange plate (4) is fixedly installed on electromagnet valve body (9) by first bolt (41), the friction plate (6) is located between flange plate (4), armature (5), the outer edge of friction plate (6), the inner edge of driving inner end cover (13) is ring array cooperation with the central axis of shaft (3) as center and is provided with limiting protrusion (61), limiting groove (131), the limiting protrusion (61) is embedded in limiting groove (131), the left end surface of electromagnet valve body (9) is provided with spring groove (92), the reset spring is installed in spring groove (92), the reset spring outer end acts on armature (5), the right end surface of electromagnet valve body (9) is provided with high-low groove (91), the left end surface of handle (7) is provided with hemispherical notch corresponding with high-low groove (91), the steel ball (10) is embedded in high-low groove (91), hemispherical notch, the second screw rod (101) is screwed and fixed by sliding through armature (5), electromagnet valve body (9) and handle (7), the end of second screw rod (101) is pressed and contacted on armature (5), the upper pressure disc (8) limits the limit position of handle (7) to the right movement.

2. The single-sided axial-outer-rotor electric machine according to claim 1, characterized in that: The microswitch (1001) is fixedly installed on the electromagnet valve body (9), and the microswitch (1001) and the electromagnet valve body (9) are connected to the control module through a circuit.

3. A single-sided axial-outer-rotor electric machine according to claim 2, characterized in that: The waterproof cover (21) is fixedly installed on the outer end cover (2), and the handle (7), the upper pressure disc (8), the electromagnet valve body (9), the steel ball (10) and the microswitch (1001) are located in the waterproof cover (21).

4. A single-sided axial-outer-rotor electric machine according to claim 3, characterized in that: The switch button (1002) is fixedly installed on the waterproof cover (21) and presses the microswitch (1001) button.

5. A single-sided axial-outer-rotor electric machine according to claim 3, characterized in that: The handle (7) is fixedly installed with a manual release rod (71), the handle (7) extends to the outside of the waterproof cover (21), and the waterproof cover (21) is provided with a stroke hole for the manual release rod (71) to rotate.

6. The single-sided axial-outer-rotor electric machine of claim 1, wherein: The limiting protrusion (61) and the limiting groove (131) are matched to form a dovetail-shaped anti-dropping structure.

7. The single-sided axial-outer-rotor electric machine of claim 1, wherein: The high-low groove (91) and the hemispherical notch are arranged in three groups in ring array corresponding to the central axis of the shaft (3).

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