CN212343569U

CN212343569U - Motor torque increasing device and hub motor using same

Info

Publication number: CN212343569U
Application number: CN202022068120.9U
Authority: CN
Inventors: 王加许; 王健; 丁伟
Original assignee: Taizhou Jinyu Electrical & Mechanical Co ltd
Current assignee: Taizhou Jinyu Electrical & Mechanical Co ltd
Priority date: 2020-09-19
Filing date: 2020-09-19
Publication date: 2021-01-12
Anticipated expiration: 2030-09-19

Abstract

The utility model relates to a motor torque increasing device and use device's in-wheel motor, include the motor shaft and install the initiative input gear at the motor epaxial, initiative input gear with be rotatable coupling between the motor shaft, initiative input gear is connected with increases the square subassembly, it is including installing at the inside drive gear group and the output gear of motor to increase the square subassembly, the output gear is fixed on the motor shaft, drive gear group include with initiative input gear engaged with first gear and with output gear engaged with second gear. Compared with the prior art, the utility model discloses a torque multiplication subassembly makes the high-speed little torque rotation of initiative input gear become the revolution of the big torque of low-speed of drive gear group, and then realizes the quick start of electric motor car.

Description

Motor torque increasing device and hub motor using same

Technical Field

The utility model relates to a motor torque increasing means and use device's in-wheel motor belongs to transmission technical field.

Background

The electric vehicle comprises an electric bicycle, an electric motorcycle, an electric automobile and the like, and the electric vehicle is used as a transportation tool for people, and can influence the normal operation of the electric vehicle if the power of the electric vehicle is insufficient under the condition of poor road conditions. And the electric motor car torque among the prior art is less, leads to its acceleration to be slower, can not be applicable to various condition, influences the driving experience.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the shortcoming of prior art, provide motor torque increase device and use device's in-wheel motor.

For realizing the purpose the utility model adopts the technical proposal that:

motor torque increasing means, including the motor shaft with install the initiative input gear on the motor shaft, initiative input gear with be rotatable coupling between the motor shaft, initiative input gear is connected with the moment subassembly that increases, the moment subassembly is including installing at the inside drive gear group and the output gear of motor, the output gear is fixed on the motor shaft, drive gear group include with initiative input gear engaged with first gear and with output gear engaged with second gear, the diameter of first gear is greater than the diameter of second gear, first gear with the second gear is fixed.

As a further optimization of the above technical solution: the middle part of the output gear is provided with a fixing hole, a gear fixing seat is installed in the fixing hole, a flat key groove is formed in the motor shaft, a flat key is correspondingly formed in the gear fixing seat, and the flat key is located in the flat key groove.

As a further optimization of the above technical solution: one end of the second gear is provided with a convex first gear rotating shaft, the other end of the second gear is provided with a connecting column, the middle part of the first gear is provided with a connecting hole, the connecting column penetrates through the connecting hole and is fixed with the first gear, and one end of the connecting column, far away from the second gear, is provided with a convex second gear rotating shaft.

As a further optimization of the above technical solution: and the first gear rotating shaft and the second gear rotating shaft are respectively provided with a first bearing and a second bearing.

As a further optimization of the above technical solution: the utility model provides an in-wheel motor who has used above-mentioned technical scheme's motor torque increase device, the cover is equipped with motor left side lid, well yoke plate, the fixed end cover of stator and motor right side lid on the motor shaft, be connected with wheel hub between motor left side lid and the motor right side lid, motor left side lid, well yoke plate and motor right side lid for the motor shaft is rotatable, well yoke plate with the motor left side lid is fixed mutually, first bearing, second bearing respectively with the motor left side lid with well yoke plate is fixed mutually.

As a further optimization of the above technical solution: the driving device comprises a rotor assembly and a stator coil assembly sleeved on the rotor assembly, the rotor assembly is connected with the driving input gear, and the stator coil assembly is fixed on the stator fixing end cover.

As a further optimization of the above technical solution: the rotor assembly is connected with the driving input gear through a rotor connecting seat, an internal spline meshed with the driving input gear is formed in the rotor connecting seat, and the driving input gear comprises an input rotating gear meshed with the first gear and an input spline meshed with the internal spline on the rotor connecting seat.

Compared with the prior art, the utility model changes the high-speed small torque autorotation of the driving input gear into the low-speed large torque revolution of the transmission gear set through the distance increasing component, thereby realizing the quick start of the electric vehicle; and the application range is wide, and the electric bicycle is suitable for most electric bicycle models, including electric bicycles, electric motorcycles, electric automobiles and the like.

Drawings

Fig. 1 is a schematic sectional structure of the present invention.

Fig. 2 is a schematic diagram of the explosion structure of the present invention.

Fig. 3 is a schematic structural diagram of a part of the structure in the present invention.

Fig. 4 is a schematic perspective view of the second gear of the present invention.

Fig. 5 is a schematic perspective view of the rotor connecting seat of the present invention.

Fig. 6 is a schematic perspective view of the driving input gear of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description. As shown in fig. 1-6, the in-wheel motor includes a driving device, the driving device is connected with a driving input gear 4, and a torque increasing assembly 1 for increasing the torque of the motor is connected to the driving input gear 4. The moment-increasing assembly 1 comprises a transmission gear set 2 and an output gear 3 which are arranged inside a motor, and the transmission gear set 2 is of a concentric wheel structure.

In the above technical scheme: the drive gear set 2 includes a first gear 21 meshed with the driving input gear 4 and a second gear 22 meshed with the output gear 3. As shown in fig. 1 and 4, one end of the second gear 22 is provided with a protruding first gear rotating shaft 221, the other end of the second gear 22 is provided with a connecting column 222, the middle of the first gear 21 is provided with a connecting hole, the connecting column 222 penetrates through the connecting hole and is fixed with the first gear 21, and the fixing is realized by interference fit of the connecting column 222 and the connecting hole. The end of the connecting column 222 remote from the second gear 22 is formed with a protruding second gear wheel rotating shaft 223. As shown in fig. 1 and 3, the first gear rotating shaft 221 and the second gear rotating shaft 223 are respectively provided with a first bearing 23 and a second bearing 24.

In the above technical scheme: as shown in fig. 1 and 3, the middle part of the output gear 3 is provided with a fixing hole, a gear fixing seat 20 is installed in the fixing hole, one end of the gear fixing seat 20 is exposed out of the output gear 3, a third gear rotating shaft is arranged on the output gear 3, and a fourth bearing 10 is sleeved on the third gear rotating shaft.

In the above technical scheme: as shown in fig. 1 and 2, the driving device includes a rotor assembly 8 and a stator coil assembly 15 sleeved on the rotor assembly 8, and the rotor assembly 8 is connected with the driving input gear 4. A fifth bearing 19 is further arranged in the rotor assembly 8, a stator fixing block 17 is further arranged at the right end of the fifth bearing 19, and a sixth bearing 18 is further arranged at the right end of the stator fixing block 17.

In the above technical scheme: the rotor assembly 8 is connected with the driving input gear 4 through a rotor connecting seat 6. As shown in fig. 5, the rotor connecting seat 6 is formed therein with an internal spline 61 engaged with the driving input gear 4.

In the above technical scheme: as shown in fig. 1 and 6, the driving input gear 4 includes an input rotation gear 41 engaged with the first gear 21, and an input spline 42 engaged with an internal spline 61 in the rotor connecting seat 6, and a connecting portion 43 is provided between the input rotation gear 41 and the input spline 42. As shown in fig. 1 and 3, the third bearing 7 is inserted into the connecting portion 43.

In the above technical scheme: as shown in fig. 1, the drive means, the drive input gear 4, is mounted on a motor shaft 5. The motor shaft 5 is provided with a flat key groove 52, the gear fixing seat 20 is correspondingly provided with a flat key, the flat key is positioned in the flat key groove 52, and the cooperation of the flat key 52 and the flat key groove enables the gear fixing seat 20 and the input gear 3 to be fixed on the motor shaft 5 and not to rotate relative to the motor shaft 5. The motor shaft 5 is rotatably connected with the driving input gear 4. The motor shaft 5 is further provided with a limiting ring 51 for limiting the installation position of the rotor assembly 8.

In the above technical scheme: as shown in fig. 1 and 2, a motor left cover 12, a middle yoke plate 16, a stator fixing end cover 14 and a motor right cover 13 are sequentially sleeved on the motor shaft 5 from left to right. The motor left cover 12 and the motor right cover 13 are respectively connected with two sides of the hub 11. The motor shaft 5 cooperates with the third bearing 7, the fourth bearing 10, the fifth bearing 19 and the sixth bearing 18 so that the middle yoke plate 16, the left motor cover 12 and the right motor cover 13 are rotatable relative to the motor shaft 5. The stator coil assembly 15 is fixed on the stator fixing end cover 14, the stator fixing end cover 14 is fixed with the stator fixing block 17, the stator fixing block 17 is fixed with the motor shaft 5, and the stator fixing block 17 is fixed with the motor shaft 5 in an interference fit mode. The middle yoke plate 16 is fixed with the motor left cover 12, and the first bearing 23 and the second bearing 24 are respectively fixed with the motor left cover 12 and the middle yoke plate 16.

In the above technical scheme: as shown in fig. 1 and 3, the device further comprises a balance gear set 9, the balance gear set 9 and the transmission gear set 2 are symmetrical with respect to the motor shaft 5, and the balance gear set 9 comprises a tanker 91 and a balance gear 92 engaged with the output gear 3. The balance gear 92 is fixed to the oil slinger 91. The oil slinger 91 is provided with a plurality of oil grooves 911, in the embodiment, the oil grooves 911 are V-shaped, and the oil grooves 911 can be in other shapes, such as U-shaped. Eight oil tanks 911 are provided in this embodiment. A gap is left between the oil slinger 91 and the driving input gear 4. The weight of the balance gear set 9 is the same as or similar to that of the transmission gear set 2, so that dynamic balance in the operation process is realized. In the present embodiment, the structure of the balance gear 92 is the same as that of the second gear 22. A seventh bearing 93 and an eighth bearing 94 are arranged on two sides of the balance gear set 9, and the seventh bearing 93 and the eighth bearing 94 are respectively fixed with the motor left cover 12 and the middle connecting plate 16. The gear needs engine oil lubrication when in operation, the engine oil is thrown between the motor left cover 12 and the middle connecting plate 16 when the driving input gear 4 drives the transmission gear set 2 to rotate, the oil throwing wheel 91 is provided with an oil groove 911, the engine oil is thrown into the oil groove 911, the engine oil is thrown to the oil throwing wheel 91 when the first gear 21 rotates, and the oil groove 911 of the oil throwing wheel 91 stores the engine oil which is thrown back to the first gear 21 when rotating, so that the engine oil is splashed between the gears, the engine oil is more uniformly distributed, and the lubrication effect is better; in addition, the engine oil is uniformly distributed and cannot be retained on one side of the balance gear set 9, and the dynamic balance effect is better realized.

The utility model discloses an operating process is as follows, and drive arrangement drives initiative input gear 4 round 5 rotations of motor shaft, and then initiative input gear 4 drives first gear 21 rotatory, and second gear 22 rotates with first gear 21 is synchronous. Since the output gear 3 is positioned by the motor shaft 5 so as not to rotate, and the second gear 22 meshes with the output gear 3, the output gear 3 plays the role of a rack in a planetary gear. The second gear 22 revolves around the output gear 3 while rotating, the second gear 22 revolves to drive the first gear 21 to revolve around the driving input gear 4, and the revolution of the transmission gear set 2 drives the motor left cover 12, the middle yoke plate 16, the hub 11 and the motor right cover 13 to rotate around the motor shaft 5. The diameter of the first gear 21 is larger than that of the second gear 22, and the high-speed small-torque rotation of the driving input gear 4 is converted into the low-speed large-torque revolution of the transmission gear set 2, so that the electric vehicle can be started quickly.

During the rotation of the motor left cover 12 and the intermediate plate 16 around the motor shaft 5, the balance gear 92 and the oil slinger 91 are also driven to revolve around the motor shaft 5. Since the balance gear 92 is meshed with the output gear 3, the balance gear 92 is rotated by the output gear 3 while revolving, and the balance gear 92 drives the tanker 91 to rotate. Lubricating oil is added between the gears during operation, and the oil is thrown between the motor left cover 12 and the middle connecting plate 16 when the driving input gear 4 drives the transmission gear set 2 to rotate, and because the oil throwing wheel 91 is provided with the oil groove 911, the oil is thrown into the oil groove 911, the first gear 21 is thrown to the oil throwing wheel 91 when rotating, and the oil groove 911 of the oil throwing wheel 91 stores the oil and throws the oil back to the first gear 21 when rotating.

The above-described balance gear group 9 is also applicable to other in-wheel motors than the above-described embodiment.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, all should fall into the protection scope of the utility model, the technical scheme that the design of this technical field technical personnel according to the utility model can be obtained through logic analysis, reasoning or limited experiment on prior art's basis, all should fall into.

Claims

1. The motor torque increasing device comprises a motor shaft (5) and a driving input gear (4) arranged on the motor shaft (5), the driving input gear (4) is rotatably connected with the motor shaft (5), it is characterized in that the driving input gear (4) is connected with a moment-increasing component (1), the moment-increasing assembly (1) comprises a transmission gear set (2) and an output gear (3) which are arranged in the motor, the output gear (3) is fixed on the motor shaft (5), the transmission gear set (2) comprises a first gear (21) meshed with the driving input gear (4) and a second gear (22) meshed with the output gear (3), the diameter of the first gear (21) is larger than that of the second gear (22), and the first gear (21) and the second gear (22) are fixed.

2. The motor torque increasing device according to claim 1, wherein a fixing hole is formed in the middle of the output gear (3), a gear fixing seat (20) is installed in the fixing hole, a flat key groove (52) is formed in the motor shaft (5), and a flat key is correspondingly formed in the gear fixing seat (20) and located in the flat key groove (52).

3. The motor torque increasing device according to claim 1, wherein one end of the second gear (22) is provided with a protruding first gear rotating shaft (221), the other end of the second gear (22) is provided with a connecting column (222), the middle part of the first gear (21) is provided with a connecting hole, the connecting column (222) penetrates through the connecting hole and is fixed with the first gear (21), and one end of the connecting column (222) far away from the second gear (22) is provided with a protruding second gear rotating shaft (223).

4. The motor torque increasing device according to claim 3, wherein the first gear rotating shaft (221) and the second gear rotating shaft (223) are provided with a first bearing (23) and a second bearing (24), respectively.

5. An in-wheel motor using the motor torque increasing device according to claim 4, wherein a motor left cover (12), a middle connecting plate (16), a stator fixing end cover (14) and a motor right cover (13) are sleeved on the motor shaft (5), a wheel hub (11) is connected between the motor left cover (12) and the motor right cover (13), the motor left cover (12), the middle connecting plate (16) and the motor right cover (13) can rotate relative to the motor shaft (5), the middle connecting plate (16) is fixed with the motor left cover (12), and the first bearing (23) and the second bearing (24) are respectively fixed with the motor left cover (12) and the middle connecting plate (16).

6. The in-wheel motor according to claim 5, characterized by further comprising a driving device, wherein the driving device comprises a rotor assembly (8) and a stator coil assembly (15) sleeved on the rotor assembly (8), the rotor assembly (8) is connected with the driving input gear (4), and the stator coil assembly (15) is fixed on the stator fixing end cover (14).

7. The in-wheel motor according to claim 6, characterized in that the rotor assembly (8) is connected with the driving input gear (4) through a rotor connecting seat (6), an internal spline (61) meshed with the driving input gear (4) is formed in the rotor connecting seat (6), and the driving input gear (4) comprises an input rotating gear (41) meshed with the first gear (21) and an input spline (42) meshed with the internal spline (61) on the rotor connecting seat (6).