Barrel shaft quick-release speed reduction hub motor

Abstract

The utility model relates to a barrel shaft quick release speed reduction wheel hub motor, which comprises a supporting shaft assembly, an iron core, a rotor, a wheel hub assembly, a disc cover and a gear speed reduction assembly which are coaxially arranged, the supporting shaft assembly comprises a supporting shaft, a barrel shaft rod and a counter locking nut, and the gear speed reduction assembly comprises a sun wheel disc, a plurality of planet wheels, an isolator and a gear ring. The supporting shaft is provided with a shaft rod hole along the axis, the barrel shaft rod is arranged in the shaft rod hole, one end of the barrel shaft rod extends outwards to form a limiting flange end, the other end of the barrel shaft rod extends outwards to form a nut locking end, and the nut locking end is provided with threads matched with the counter-locking nut. The speed reduction hub motor with the barrel shaft capable of being disassembled quickly is small in size, light in weight, high in efficiency, long in service life and capable of being disassembled and assembled quickly.

Description

TECHNICAL FIELD

[0001] The utility model relates to wheel hub motor technical field especially relates to a bucket axle quick release reduction wheel hub motor. BACKGROUND

[0002] Wheel hub motor is a kind of wheel edge transmission mechanism designed by integrating power system, transmission system and brake system, mainly applied to the wheel structure of various vehicles.For example, wheel hub motor is also used in Ebike bicycle.

[0003] The wheel hub motor used on Ebike bicycle in prior art mainly has the following problems: complex structure, heavy weight, inconvenient installation and disassembly. CONTENT OF UTILITY MODEL

[0004] In view of the above problems, the utility model provides a kind of bucket axle quick release reduction wheel hub motor with small volume, light weight, high efficiency, long service life and quick disassembly.

[0005] The utility model is realized through the following technical schemes: a kind of bucket axle quick release reduction wheel hub motor, including the support shaft assembly of coaxial setting, iron core, rotor, wheel hub assembly, dish cover, gear reduction assembly, the iron core is set on the support shaft assembly, the rotor is set on the support shaft assembly by first bearing and is set in the iron core outer, the gear reduction assembly is set on the support shaft assembly, the wheel hub assembly one side is set on the support shaft assembly by second bearing and is set in the rotor and gear reduction assembly outer, the dish cover is set on the iron core by third bearing and is connected to the wheel hub assembly other side end face by pressing.

[0006] In order to realize the quick disassembly of wheel hub motor, to improve carrying convenience and use flexibility, the support shaft assembly includes support shaft, bucket shaft rod and locking nut, the support shaft is provided with shaft rod hole along axis, the bucket shaft rod is arranged in the shaft rod hole, one end of the bucket shaft rod extends outwardly to limit flange end, the other end extends outwardly with nut locking end, the nut locking end is provided with thread matched with the locking nut, and the bucket shaft rod is screwed in the locking nut through the nut locking end.

[0007] In order to facilitate the disassembly of bucket shaft rod, the limit flange end is provided with internal hexagonal hole.

[0008] In order to adapt to the frame structure and improve the installation reliability, further, the first stop opening is formed on the outer circle of one end of the support shaft, the first stop opening and the limit flange end form the first frame limiting groove, the second stop opening is formed on the outer circle of the other end of the support shaft, the locking nut is provided with nut limiting stop opening at corresponding position, and the second stop opening and the nut limiting stop opening form the second frame limiting groove.

[0009] In order to realize the speed reduction and torque increase, the gear reduction assembly comprises a sun gear, a plurality of planetary gears, a one-way clutch and a ring gear, the sun gear is sleeved on the supporting shaft and fixedly connected with the rotor through the end face, the one-way clutch is sleeved on the supporting shaft, the one-way clutch is provided with a plurality of planetary gear shafts, the planetary gears are sleeved on the corresponding planetary gear shafts through the fourth bearing and engaged with the sun gear, the ring gear is sleeved outside the planetary gears and engaged with the planetary gears, and the one-way clutch can drive the planetary gears to rotate clockwise or counterclockwise along the ring gear.

[0010] Preferably, the number of the planetary gears is three, and the number of the planetary gear shafts on the one-way clutch is three, and more planetary gears and corresponding planetary gear shafts can be designed according to actual conditions.

[0011] In order to reduce the noise during the operation of the whole hub motor and improve the driving comfort, the sun gear, the planetary gears and the ring gear are all helical gears.

[0012] The barrel shaft quick-release speed reduction hub motor has the advantages that: the supporting shaft assembly can be quickly disassembled and assembled, the whole hub motor can be quickly disassembled and assembled, and the convenience and flexibility of carrying and using are greatly improved; the speed ratio and the tooth profile of the gear reduction assembly are optimized, the torque is improved, and the noise is reduced; in addition, the barrel shaft quick-release speed reduction hub motor has the advantages of compact structure, small size and light weight. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 Fig. 1 is a perspective view of a barrel shaft quick-release speed reduction hub motor according to the present application;

[0014] Fig. 2 Fig. 2 is a sectional view of the barrel shaft quick-release speed reduction hub motor according to the present application;

[0015] Fig. 3 Fig. 3 is a structural schematic view of a gear reduction assembly of the barrel shaft quick-release speed reduction hub motor according to the present application;

[0016] In the drawing: 1. supporting shaft assembly; 11. supporting shaft; 111. first stop; 112. second stop; 113. shaft hole; 12. barrel shaft; 121. limit flange end; 1211. internal hexagonal hole; 122. nut locking end; 13. locking nut; 131. nut limit stop; 2. iron core; 3. rotor; 4. hub assembly; 5. disc cover; 6. gear reduction assembly; 61. sun gear; 62. planetary gear; 63. one-way clutch; 631. planetary gear shaft; 64. ring gear; 71. first bearing; 72. second bearing; 73. third bearing; 74. fourth bearing; 81. first frame limit groove; 82. second frame limit groove. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0018] like Figs. 1-3 The illustrated quick-release geared hub motor includes a support shaft assembly 1, an iron core 2, a rotor 3, a hub assembly 4, a disc cover 5, and a gear reduction assembly 6, all coaxially arranged. The support shaft assembly 1 includes a support shaft 11, a barrel shaft rod 12, and a locking nut 13. One end of the support shaft 11 has a first stop 111 on its outer circumference, and the other end has a second stop 112 on its outer circumference. The support shaft 11 has a shaft hole 113 along its axis. The barrel shaft rod 12 is disposed within the shaft hole 113. One end of the barrel shaft rod 12 extends outward to a limiting flange end 121. An internal hexagonal hole 1211 is provided on end 121. The first stop 111 and the limiting flange end 121 together form the first frame limiting groove 81. The other end of the barrel shaft 12 extends outward to a nut locking end 122. The nut locking end 122 is provided with a thread that matches the locking nut 13. The barrel shaft 12 is screwed into the locking nut 13 through the nut locking end 122. A nut limiting stop 131 is provided at a corresponding position on the locking nut 13. The second stop 112 and the nut limiting stop 131 together form the second frame limiting groove 82.

[0019] The iron core 2 is sleeved on the support shaft 11. The rotor 3 is sleeved on the support shaft 11 via the first bearing 71 and is sleeved outside the iron core 2. The gear reduction assembly 6 is sleeved on the support shaft 11. One side of the hub assembly 4 is sleeved on the support shaft 11 via the second bearing 72 and is sleeved outside the rotor 3 and the gear reduction assembly 6. The disc cover 5 is sleeved on the iron core 2 via the third bearing 73 and is pressed and connected to the other end face of the hub assembly 4.

[0020] The gear reduction assembly 6 includes a sun disk 61, three planetary gears 62, a one-way gear 63, and a ring gear 64. The sun disk 61, planetary gears 62, and ring gear 64 are all helical gears. The sun disk 61 is sleeved on the support shaft 11 and is fixedly connected to the rotor 3 through its end face. The one-way gear 63 is sleeved on the support shaft 11 and has three planetary gear shafts 631. The planetary gears 62 are sleeved on the corresponding planetary gear shafts 631 through a fourth bearing 74 and mesh with the sun disk 61. The ring gear 64 is sleeved outside the planetary gears 62 and meshes with the planetary gears 62.

[0021] The application scene of the bucket shaft quick-release reduction hub motor mainly includes ebike bicycle for city commuting, leisure and entertainment, fitness and exercise and short trip, when installation, the bucket shaft quick-release reduction hub motor is placed on the corresponding position of the frame, the frame is respectively placed in the first frame limiting groove 81 and the second frame limiting groove 82, the lock nut 13 is pre-fixedly connected on the corresponding position of the frame, the bucket shaft rod 12 is screwed into the lock nut 13 through the inner hexagonal hole 1211 of the end of the bucket shaft rod 12, and the installation can be quickly realized.

[0022] When used, the hub assembly 4 and the disc cover 5 can be driven in one direction or in two directions by manpower, under the action of the iron core 2, the magnetic field of the magnetic steel in the rotor 3 is generated, the rotor 3 rotates, the sun gear disc 61 is driven to rotate, so that the three planetary gears 62 are driven to rotate along the planetary gear shaft 631; at the same time, the planetary gear 62 drives the gear ring 64 to rotate, so that the speed reduction and torque increase are realized. The one-way clutch 63 can adjust the transmission direction to realize clockwise or counterclockwise rotation.

[0023] When disassembly is needed, the bucket shaft rod 12 is unscrewed and pulled out through the inner hexagonal hole 1211 of the end of the bucket shaft rod 12, so that the whole bucket shaft quick-release reduction hub motor can be quickly disassembled.

[0024] In all the examples shown and described herein, any specific values should be interpreted as merely exemplary and not as a limitation, and thus, other examples of the example embodiments can have different values.

[0025] It should be noted that: similar signs and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0026] In addition, in the description of the embodiments of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting", "provided with" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In the description of the utility model, it is necessary to explain that the directions or position relations of terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like are based on the directions or position relations shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements indicated must have a specific direction, be constructed and operated in a specific direction, and thus cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0028] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, several modifications and improvements can be made, which all belong to the protection scope of the utility model.

Claims

1. A barrel shaft quick release reduction hub motor, comprising a supporting shaft assembly, a core, a rotor, a hub assembly, a disc cover, a gear reduction assembly, the core is sleeved on the supporting shaft assembly, the rotor is sleeved on the supporting shaft assembly through a first bearing and outside the core, the gear reduction assembly is sleeved on the supporting shaft assembly, one side of the hub assembly is sleeved on the supporting shaft assembly through a second bearing and outside the rotor and the gear reduction assembly, the disc cover is sleeved on the core through a third bearing and is tightly connected to the other side end face of the hub assembly, characterized in that: The supporting shaft assembly comprises a supporting shaft, a barrel shaft rod and a locking nut, the supporting shaft is provided with a shaft rod hole along an axis, the barrel shaft rod is arranged in the shaft rod hole, one end of the barrel shaft rod extends outward to form a limiting flange end, the other end of the barrel shaft rod extends outward to form a nut locking end, the nut locking end is provided with threads matched with the locking nut, and the barrel shaft rod is screwed in the locking nut through the nut locking end.

2. The barrel shaft quick release reduction hub motor of claim 1, wherein: An internal hexagonal hole is formed in the limiting flange end.

3. The barrel shaft quick release reduction hub motor of claim 1, wherein: A first stop opening is formed in the outer circle of one end of the supporting shaft, the first stop opening and the limiting flange end jointly form a first frame limiting groove, a second stop opening is formed in the outer circle of the other end of the supporting shaft, and a nut limiting stop opening is formed in the corresponding position of the locking nut, the second stop opening and the nut limiting stop opening jointly form a second frame limiting groove.

4. The barrel shaft quick release reduction hub motor of claim 1, wherein: The gear reduction assembly comprises a sun disc, a plurality of planetary gears, a one-way device and a ring gear, the sun disc is sleeved on the supporting shaft and is fixedly connected with the rotor through the end face, the one-way device is sleeved on the supporting shaft, the one-way device is provided with a plurality of planetary gear shafts, the planetary gears are sleeved on the corresponding planetary gear shafts through the fourth bearing and are engaged with the sun disc, the ring gear is sleeved outside the planetary gears and is engaged with the planetary gears, and the one-way device can drive the planetary gears to rotate clockwise or counterclockwise along the ring gear.

5. The barrel shaft quick release reduction hub motor of claim 4, wherein: The sun disc, the planetary gears and the ring gear are all helical gears.

6. The barrel shaft quick release reduction hub motor of claim 4, wherein: The number of the planetary gears is three, and the number of the planetary gear shafts on the one-way device is three.

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