CN220122725U - Power-assisted motor integrated annular gear structure - Google Patents

Abstract

The utility model provides an integrated annular gear structure of a booster motor, which structurally comprises a stator and a rotor; the output end of the rotor is in transmission connection with the inner gear ring through a transmission gear, annular tooth parts and connecting walls are arranged on the inner side of the inner gear ring, clutch pieces are assembled on the inner side of the connecting walls, mounting grooves are formed in the annular walls of the clutch pieces, unidirectional pieces assembled through springs are arranged in the mounting grooves, the unidirectional pieces are tightly propped between the connecting walls and the wall surfaces of the mounting grooves by the springs, and the inner sides of the clutch pieces are fixedly connected with hubs. The structure not only realizes unidirectional transmission, but also designs the inner gear ring as a part of a clutch structure, so that the number of parts of the whole motor is reduced, the manufacturing size of the hub motor can be effectively reduced, the weight of the hub motor is reduced, and the hub motor is beneficial to miniaturized design.

Description

Power-assisted motor integrated annular gear structure

Technical Field

The utility model belongs to the technical field of hub motors, and particularly relates to an integrated annular gear structure of a booster motor.

Background

The hub motor moves through transmission structure drive hub by electromagnetic force, hub motor internal design has stator and rotor, when the motor passes through transmission structure with the torsion that electromagnetic force produced and inputs to the wheel hub on, often use planetary structure as the transmission structure of power, like the patent hub motor big axle limit wall line structure of publication No. 218006035U and the novel assembly structure of motor circuit board of publication No. 215528738U, transmission structure wherein all uses planetary transmission structure, the output of planetary transmission structure of hub motor normally uses ring gear structure to be connected with the wheel hub part of motor, and in order to make hub motor assembly have unidirectional transmission's function on equipment such as bicycle, often use clutch module to be connected between ring gear and the wheel hub, the inner wall of ring gear needs to be fixed with clutch module's outside at this moment, just so make hub motor's overall dimension great, this kind of structure is unfavorable for the design of motor miniaturization. Meanwhile, the size of the inner gear ring of the traditional hub motor is larger, and the gear structure is also manufactured by metal, so that the whole weight of the hub motor is larger.

Disclosure of Invention

In order to solve the problems, the utility model provides an integrated inner gear ring structure of a booster motor, wherein the outer ring of a clutch structure and the inner gear ring of a hub motor are integrated.

The technical scheme adopted for solving the technical problems is as follows: the integrated inner gear ring structure of the booster motor comprises a stator and a rotor; the output end of the rotor is in transmission connection with the inner gear ring through a transmission gear, an annular tooth part and a connecting wall are designed on the inner side of the inner gear ring, a clutch piece is assembled on the inner side of the connecting wall, an installation groove is designed on the annular wall of the clutch piece, a one-way piece assembled through a spring is designed in the installation groove, the spring tightly pushes the one-way piece between the connecting wall and the wall surface of the installation groove, when the inner gear ring rotates towards the one-way piece in the pushing direction relative to the clutch piece, the inner gear ring and the clutch piece are in locking transmission through the one-way piece, and when the inner gear ring rotates towards the opposite direction relative to the one-way piece in the pushing direction relative to the clutch piece, the inner gear ring and the clutch piece are in disengaging movement, and the inner side of the clutch piece is fixedly connected with the hub.

Preferably, the stator is wrapped outside the rotor.

Preferably, the tooth part of the inner gear ring is made of an aluminum alloy material, the connecting wall of the inner gear ring is made of a steel material, and the tooth part and the connecting wall are welded into a whole.

Preferably, the tooth part is annular before being welded with the connecting wall, a riveting edge is designed on the right side of the tooth part, an assembly groove is formed in the riveting edge, an annular connecting edge with a conical section is designed on the left side of the connecting wall, the connecting edge is assembled in the assembly groove, the riveting edge is deformed and pressed onto the connecting edge, then the riveted tooth part is welded with the connecting wall, and finally the welded integrated part is processed with inner teeth and the inner side wall surface of the connecting wall.

Preferably, the transmission gear is made of nylon material.

The utility model has the beneficial effects that: the power-assisted motor integrated inner gear ring structure is used in a hub motor, and the hub motor can be a hub motor of an electric bicycle or a working motor of other equipment. The structure forms a one-way transmission clutch structure through the connection wall of the clutch piece and the annular gear and the one-way piece, so that torque force transmitted from the rotor to the annular gear through the transmission gear can be transmitted to the clutch piece in one way, and then the hub is driven to rotate through the clutch piece, and when the hub moves reversely, the hub and the annular gear are separated from each other. The structure not only realizes unidirectional transmission, but also designs the inner gear ring as a part of a clutch structure, so that the number of parts of the whole motor is reduced, the manufacturing size of the hub motor can be effectively reduced, the weight of the hub motor is reduced, and the hub motor is beneficial to the miniaturization design of the hub motor.

Drawings

Fig. 1 is a schematic sectional structure of an integrated ring gear structure of a booster motor.

Fig. 2 is a schematic structural view of the ring gear and clutch assembly.

Fig. 3 is a schematic perspective view of the ring gear.

Fig. 4 is a schematic cross-sectional structure of the tooth portion and the connecting wall before the ring gear riveting process.

Fig. 5 is a schematic structural view of a cross section of the ring gear after riveting.

Detailed Description

The utility model is further illustrated by the following examples:

in the embodiment shown in fig. 1, the integrated inner gear ring structure of the booster motor comprises a stator 11 and a rotor 12; the hub motor is similar in structure to a conventional hub motor. The output end of the rotor 12 is in transmission connection with the inner gear ring 3 through the transmission gear 2, an annular tooth part 31 and a connecting wall 32 are designed on the inner side of the inner gear ring 3, and a clutch 4 is assembled on the inner side of the connecting wall 32. As shown in fig. 2, a mounting groove 41 is formed in the annular wall of the clutch member 4, a unidirectional member 43 assembled by a spring 42 is formed in the mounting groove 41, and the spring 42 abuts the unidirectional member 43 between the connecting wall 32 and the wall surface of the mounting groove 41. The illustrated unidirectional member 43 may be a ball or a roller configuration, and the illustrated mounting groove 41 is specifically sized according to the shape and size of the spring 42 and the unidirectional member 43. In this embodiment, three mounting grooves 41 are formed on each clutch member 4 in an annular manner, and each mounting groove 41 is provided with a corresponding spring 42 and a unidirectional member 43. When the inner gear ring 3 rotates in the propping direction relative to the clutch piece 4 towards the unidirectional piece 43, the inner gear ring 3 and the clutch piece 4 are in locking transmission through the unidirectional piece 43, and when the inner gear ring 3 rotates in the opposite propping direction relative to the clutch piece 4 towards the unidirectional piece 43, the inner gear ring 3 and the clutch piece 4 are in disengaging movement, and the inner side of the clutch piece 4 is fixedly connected with the hub 5.

The power-assisted motor integrated inner gear ring structure is used in a hub motor, and the hub motor can be a hub motor of an electric bicycle or a working motor of other equipment. As shown in fig. 1 and 2, the structure forms a unidirectional transmission clutch structure through the cooperation of the clutch member 4, the connecting wall 32 of the annular gear 3 and the unidirectional member 43, so that the torque transmitted from the rotor 12 to the annular gear 3 through the transmission gear 2 can be transmitted to the clutch member 43 in one direction, and then the hub 5 is driven to rotate through the clutch member 4. And when the hub 5 moves reversely, the hub 5 and the annular gear 3 are separated from each other. The structure not only realizes unidirectional transmission, but also designs the inner gear ring 3 into a part of a clutch structure, so that the number of parts of the whole motor is reduced, the manufacturing size of the hub motor can be effectively reduced, the weight of the hub motor is reduced, and the hub motor is beneficial to the miniaturization design of the hub motor.

In this embodiment, as shown in fig. 1, the stator 11 is wrapped outside the rotor 12. Namely, the hub motor is of an inner rotor structure. In this structure, the tooth portion 31 of the ring gear 3 is made of an aluminum alloy material, the connecting wall 32 of the ring gear 3 is made of a steel material, and the tooth portion 31 and the connecting wall 32 are welded integrally. The aluminum alloy material with the same volume is lighter, the quality of the hub motor can be effectively reduced, when the ring gear 3 and the clutch piece 4 are separated from movement, the connecting wall 32 is in friction contact with the one-way piece 43, and the hub motor is made of steel materials, so that the hub motor is more wear-resistant, and the service life of a product can be guaranteed.

In the specific processing, as shown in fig. 4, the tooth portion 31 is annular before being welded to the connecting wall 32, a riveting edge 311 is designed on the right side of the tooth portion 31, an assembly groove is machined in the riveting edge 311, and an annular connecting edge 321 with a conical section is designed on the left side of the connecting wall 32. During processing, the connecting edge 321 is assembled in the assembling groove, the riveting edge 311 is deformed and pressed onto the connecting edge 321 in a pressing and riveting mode, the structure after riveting is shown in fig. 5, then the riveted tooth part 31 and the connecting wall 32 are welded into a whole, finally the welded integral piece is processed into the inner teeth and the inner side wall surface of the connecting wall 32, and finally the inner gear ring 3 shown in fig. 3 is processed. Through the extrusion riveting of annular limit for tooth portion 31 and the large tracts of land compression contact of linking wall 32 of ring gear 3, then connect as an organic wholely through the welded connection, the part is whole comparatively firm like this. The inner gear ring 3 is welded and then machined, so that the machined size is more accurate, and the assembly precision is ensured.

In a specific design, the transmission gear 2 is made of nylon material. The metal gear and the nylon gear have lower sound during transmission, so that the sound noise can be effectively reduced.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (5)

1. An integrated inner gear ring structure of a booster motor comprises a stator (11) and a rotor (12); the output end of the rotor (12) is in transmission connection with the inner gear ring (3) through a transmission gear (2), and an annular tooth part (31) and a connecting wall (32) are arranged on the inner side of the inner gear ring (3), and the rotor is characterized in that: the clutch is characterized in that a clutch piece (4) is arranged on the inner side of the connecting wall (32), a mounting groove (41) is formed in the annular wall of the clutch piece (4), a one-way piece (43) assembled through a spring (42) is arranged in the mounting groove (41), the spring (42) tightly pushes the one-way piece (43) between the connecting wall (32) and the wall surface of the mounting groove (41), when the annular gear (3) rotates towards the one-way piece (43) in the pushing direction relative to the clutch piece (4), the annular gear (3) and the clutch piece (4) are in locking transmission through the one-way piece (43), and when the annular gear (3) rotates towards the opposite direction relative to the one-way piece (43) in a pushing mode, the annular gear (3) and the clutch piece (4) are in a disengaging motion, and the inner side of the clutch piece (4) is fixedly connected with the hub (5).

2. The booster motor integrated ring gear structure according to claim 1, wherein: the stator (11) is wrapped outside the rotor (12).

3. The booster motor integrated ring gear structure according to claim 1, wherein: the tooth parts (31) of the inner gear ring (3) are made of aluminum alloy materials, the connecting walls (32) of the inner gear ring (3) are made of steel materials, and the tooth parts (31) and the connecting walls (32) are welded into a whole.

4. The booster motor integrated ring gear structure according to claim 1, wherein: tooth portion (31) be annular before processing with connecting wall (32) welding, tooth portion (31) right side design has riveting limit (311), processing has the assembly groove in riveting limit (311), connecting wall (32) left side design has annular connecting limit (321) that the cross-section is the toper, connecting limit (321) assemble in the assembly groove, will riveting limit (311) deformation compress tightly on connecting limit (321), then with tooth portion (31) after the riveting and connecting wall (32) welding, with the integral piece processing internal tooth after the welding with the inside wall surface of connecting wall (32) at last.

5. The booster motor integrated ring gear structure according to claim 1, wherein: the transmission gear (2) is made of nylon materials.