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A disassembled and assembled power module includes: a wheel shaft; a power module; a central shaft, arranged in the power module and passing through the wheel shaft; and an engaging unit, capable of fastening the central shaft to the wheel shaft. In an embodiment when the detachable power module is

A disassembled and assembled power module includes: a wheel shaft; a power module; a central shaft, arranged in the power module and passing through the wheel shaft; and an engaging unit, capable of fastening the central shaft to the wheel shaft. In an embodiment when the detachable power module is applied in an electric driven wheelchair, it enables the weight of the wheelchair to be reduced by simply detach and remove the detachable power from the wheelchair so that the electric driven wheelchair without the heavy power module can be carry and transport easily, and also the moving range of the electric driven wheelchair can be increased as its power module can be easily detached and replaced with another fully charged power module so that the range anxiety of the disabled person using the same or the assistant can be relieved.

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1. A detachable power module, comprising: a wheel shaft;a power module;a central shaft, arranged in the power module and passing through the wheel shaft; andan engaging unit, capable of fastening the central shaft to the wheel shaft;wherein the central shaft comprises at least one receiving hole, th

1. A detachable power module, comprising: a wheel shaft;a power module;a central shaft, arranged in the power module and passing through the wheel shaft; andan engaging unit, capable of fastening the central shaft to the wheel shaft;wherein the central shaft comprises at least one receiving hole, the engaging unit comprises at least one reset piece, at least one engaging piece and at least one linkage piece, the reset piece and the engaging piece are arranged in the receiving hole, the engaging piece passes out of the receiving hole, and an end of the linkage piece is coupled to the engaging piece; the pushing unit is arranged in the central shaft, the pushing unit is coupled to the engaging unit, the pushing unit comprises a reset piece, an end of the reset piece pushes against the pushing unit, and another end of the reset piece pushes against the central shaft. 2. The detachable power module according to claim 1, wherein the power module comprises a motor unit and a control unit, and the motor unit is electrically coupled to the control unit; a deceleration unit, and the deceleration unit is coupled to the motor unit; and an electrical contact unit, the electrical contact unit is arranged on the central shaft, and the electrical contact unit is electrically coupled to the control unit. 3. The detachable power module according to claim 1, wherein the reset piece is an elastic component, the pushing unit is a push rod; the number of the receiving holes is more than one, the linkage piece is a steel wire, and the engaging piece is a cylinder. 4. The detachable power module according to claim 3, wherein the detachable power module is applied to a wheel chair, the wheel chair comprises at least one rotation unit, each rotation unit comprises a hand wheel and a road wheel, the hand wheel is arranged at a side of the road wheel, a hub receiving space exists between the hand wheel and the road wheel, the power module and the central shaft are arranged in the hub receiving space, the shaft is arranged at the road wheel, a locking interface exists between the shaft and the central shaft, and the engaging unit is selectively engaged with the wheel shaft, the shaft comprises at least one fixing hole, and the engaging piece is selectively engaged at the fixing hole; or the detachable power module is applied to a wheel chair, the wheel chair comprises at least one rotation unit, each rotation unit comprises a hand wheel and a road wheel, the hand wheel is arranged at a side of the road wheel, a huh receiving space exists between the hand wheel and the road wheel, the power module and the central shaft are arranged in the hub receiving space, the wheel shaft is arranged at the road wheel, a locking interface exists between the wheel shaft and the central shaft, the engaging unit is selectively engaged with the central shaft; alternatively, the detachable power module is applied to a wheel-type vehicle, the wheel-type vehicle comprises at least one rotation unit, the rotation unit comprises a hub receiving space, the wheel shaft is arranged at the rotation unit, a locking interface exists between the shaft and the central shaft, and the engaging unit is selectively engaged with the central shaft, an end of the central shaft at least comprises a central shaft push-out unit. 5. A detachable power module, comprising: a wheel shaft:a power module;a central shaft, arranged in the power module and passing through the wheel shaft; andan engaging unit, capable of fastening the central shaft to the wheel shaft;wherein the central shaft comprises at least one clamping groove, at least one receiving groove is selectively arranged at the shaft or in a hub receiving space of a rotation unit of a wheel-type vehicle, the engaging unit comprise at least one reset piece and at least one engaging piece, the reset piece and the engaging piece are arranged in the receiving groove, an end of the reset piece pushes against the receiving groove, another end of the reset piece pushes against the engaging piece, and the engaging piece is selectively engaged at the clamping groove; the reset piece is an elastic component, the engaging piece is a ball, the locking interface is at least a surface, a spline, a quadrate groove or a key groove, and the clamping groove is a V-shaped groove. 6. A detachable power module, comprising: a wheel shaft;a power module;a central shaft, arranged in the power module and passing through the wheel shaft; andan engaging unit, capable of fastening the central shaft to the wheel shaft;wherein the central shaft comprises at least one first receiving space; the wheel shaft comprises at least one second receiving space; the engaging unit is arranged in the second receiving space, and is selectively engaged with the first receiving space; the detachable power module is applied to a frame, and the frame is a wheel chair or a wheel-type vehicle; the engaging unit comprises at least one engaging piece and at least one reset piece, the reset piece is arranged in the second receiving space, an end of the reset piece pushes against the second receiving space, another end of the reset piece pushes against the engaging piece, and the engaging piece is selectively engaged the first receiving space; the engaging unit further comprises at least one connection piece, and the connection piece is coupled to the engaging piece. 7. The detachable power module according to claim 6, wherein the engaging unit is located at an end of the central shaft, and the end is adjacent to the frame. 8. A detachable power module, comprising: a wheel shaft;a power module;a central shaft, arranged in the power module and passing through the wheel shaft;an engaging unit, capable of fastening the central shaft to the wheel shaft; anda releasing unit, arranged at the power module, the releasing unit being coupled to the engaging unit;wherein the central shaft comprises at least one receiving hole, the engaging unit comprises at least one reset piece, at least one engaging piece and a linkage piece, the reset piece and the engaging piece are arranged in the receiving hole, the engaging piece passes out of the receiving hole, and an end of the linkage piece is coupled to the engaging piece; the detachable power module according, further comprises a pulling unit arranged at the central shaft, two ends of the pulling unit are respectively coupled to the engaging unit and the releasing unit, the pulling unit comprises a reset piece, an end of the reset piece pushing against the puling unit, and another end of the reset piece pushing against the central shaft. 9. The detachable power module according to claim 8, wherein the power module comprises a motor unit and a control unit, and the motor unit is electrically coupled to the control unit; a deceleration unit, and the deceleration unit is coupled to the motor unit; and an electrical contact unit, the electrical contact unit is arranged at the central shaft, and the electrical contact unit is electrically coupled to the control unit. 10. The detachable power module according to claim 8, wherein the reset piece is an elastic component, the pulling unit is a pulling rod; the number of the receiving holes is more than one; the linkage piece is a steel wire, and the engaging piece is a cylinder 11. The detachable power module according to claim 8, wherein the detachable power module is applied to a wheel chair, the wheel chair comprises at least one rotation unit, each rotation unit comprises a hand wheel and a road wheel, the hand wheel is arranged at a side of the road wheel, a hub receiving space exists between the hand wheel and the road wheel, the power module aid the central shaft are arranged in the hub receiving space, the wheel shaft is arranged at the road wheel, a locking interface exists between the wheel shaft and the central shaft, and the engaging unit is selectively engaged with the wheel shaft; alternatively, the detachable power module is applied to a wheel-type vehicle, the wheel-type vehicle comprises at least one rotation unit, each rotation unit comprises a hub receiving space, the power module and the central shaft are arranged in the hub receiving space, the wheel shaft is arranged at the rotation unit, a locking interface exists between the wheel shaft and the central shaft, and the engaging unit is selectively engaged with the wheel shaft; the hub receiving space comprises a receiving groove; the releasing unit comprises a reset piece, a pushing piece and a connection piece, the reset piece and the pushing piece are arranged in the receiving groove, an end of the connection piece is coupled to the pushing piece, and another end of the connection piece is coupled to the pulling unit. 12. A removable power module, comprising: a wheel shaft;a power module;a central shaft, arranged in the power module and passing through the wheel shaft;an engaging unit, capable of fastening the central shaft to the wheel shaft;a releasing unit, arranged at the power module, the releasing unit being coupled to the engaging unit; anda wheel shaft adapter, coupled to the wheel shaft;wherein the central shaft comprises at least one receiving hole, the engaging unit comprises at least one reset piece, at least one engaging piece and a linkage piece, the reset piece and the engaging piece are arranged in the receiving hole, the engaging piece passes out of the receiving hole, and an end of the linkage piece is coupled to the engaging piece; the detachable power module further comprises a pulling unit arranged in the central shaft, two ends of the pulling unit respectively coupled to the engaging unit and the releasing unit, the pulling unit comprising a reset piece, an end of the reset piece pushing against the pushing unit, and another end of the reset piece pushing against the central shaft. 13. The detachable power module according to claim 12, wherein the power module comprises a motor unit and a control unit, and the motor unit is electrically coupled to the control unit; a deceleration unit, and the deceleration unit is coupled to the motor unit; and a power supply unit, and the power supply unit is electrically coupled to the control unit. 14. The detachable power module according to claim 13, wherein the power supply unit is a lithium battery, a storage battery, a lead acid battery, a nickel-metal hydride battery, a lithium ion battery, a solar cell or a fuel cell. 15. The detachable power module according to claim 12, wherein the reset piece is an elastic component, the pulling unit is a pulling rod; the number of the receiving holes is more than one, the receiving holes are distributed in an equiangular manner; the linkage piece is a steel wire, and the engaging piece is a cylinder. 16. The detachable power module according to claim 12, wherein the detachable power module is applied to a wheel chair, the wheel chair comprises at least one rotation unit, each rotation unit comprises a hand wheel and a road wheel, the hand wheel is arranged at a side of the road wheel, a hub receiving space exists between the hand wheel and the road wheel, the power module and the central shaft are arranged in the hub receiving space, the wheel shaft is arranged at the road wheel, a locking interface exists between the wheel shaft and the central shaft, and the engaging unit is selectively engaged with the wheel shaft; alternatively, the detachable power module is applied to a wheel-type vehicle, the wheel-type vehicle comprises at least one rotation unit, each rotation unit comprises a hub receiving space, the power module and the central shaft are arranged in the hub receiving space, the wheel shaft is arranged at the rotation unit, a locking interface exists between the wheel shaft and the central shaft, and the engaging unit is selectively engaged with the wheel shaft; the hub receiving space comprises a receiving groove; the releasing unit comprises a reset piece, a pushing piece and a connection piece, the reset piece and the pushing piece are arranged in the receiving groove, an end of the connection piece is coupled to the pushing piece, and another end of the connection piece is coupled to the pulling unit. 17. A detachable power module, comprising: a power module; anda releasing unit, arranged at the power module;wherein the detachable power module is applied to a wheel chair, the wheel chair comprises at least one rotation unit, each rotation unit has a hand wheel and a road wheel, the hand wheel is arranged at a side of the road wheel, a hub receiving space exists between the hand wheel and the road wheel, and the power module is arranged in the hub receiving space: alternatively, the removable power module is applied to a wheel-type vehicle, the wheel-type vehicle comprises at least one rotation unit, each rotation unit comprises a hub receiving space, and the power module is arranged in the hub receiving space; and the hub receiving space comprises at least one receiving hole; the releasing unit comprises a knob, at least one linkage piece, at least one reset piece and at least one engaging piece, the knob is arranged in the hub receiving space, the reset piece and the engaging piece are arranged in the receiving hole, an end of the reset piece pushes against the engaging piece, another end of the reset piece pushes against the receiving hole, an end of the engaging piece passes out of the receiving hole, an end of the linkage piece is coupled to the knob, and another end of the linkage piece is coupled to the engaging piece. 18. The detachable power module according to claim 17, wherein the power module comprises a motor unit and a control unit, and the motor unit is electrically coupled to the control unit; a power supply unit, and the power supply unit is electrically coupled to the control unit; at least one shaft, and the shaft is coupled to the central shaft; the power module further comprises an electrical contact unit, and the electrical contact unit is coupled to the control unit; and a deceleration unit, and the deceleration unit is coupled to the motor unit. 19. The detachable power module according to claim 18, wherein the motor unit is an axial flux motor, a radial flux motor or an external rotation motor. 20. The detachable power module according to claim 17, wherein the number of the receiving holes is more than one, and the receiving holes are distributed in an equiangular manner; the linkage piece is a steel wire, the reset piece is a spring, and the engaging piece is a cylinder.