TWM517155U - Compound speed-change motor and electric vehicle - Google Patents

Description

Compound variable speed motor and electric vehicle

This creation relates to a motor, and more particularly to a compound variable speed motor and an electric vehicle.

Generally, the variable speed bicycle is equipped with a shifting device for the driver to change different speed ratios according to various road sections or road conditions. At present, the shifting device can be roughly divided into an external shifting type and an internal shifting type. The external shifting type shifting device is mounted on the frame and exposed to the outside. The advantage is that the shifting range is large, but the disadvantage is that the shifting is easy to be disconnected. Problems with friction and need to be cleaned and maintained frequently. The internal shifting type of shifting device is usually disposed inside the hub. Compared with the external shifting type, it is not easy to be disconnected and does not require frequent maintenance, so the service life is long.

However, since the above-described internal shift type shifting device is limited to the space inside the hub, the range of the shiftable speed is smaller than that of the external shifting type shifting device, for example, the external shifting type shifting device can reach 30 segments. Above the shifting speed, the internal shifting type shifting device can only be used in the shift range of 3 to 5 segments. Therefore, how to further improve the shift range of the internal shifting transmission mounted inside the hub is a goal and subject that the relevant industry is striving to develop.

In view of the above problems, in one embodiment, a compound variable speed motor is provided, including an internal transmission, a hub, and an electric variable speed motor. The internal transmission includes a central shaft and a power input member, a housing and a power output member which are sequentially disposed along the central axis. An internal shifting gear set is disposed inside the housing, and the internal shifting gear set is coupled between the power input member and the power output member. The hub includes a central portion and an outer hub portion. The central portion is fixed on the power output member and can rotate with the power output member, and the outer hub portion surrounds the outer casing and forms an annular space with the casing. The electric variable speed motor is accommodated in the annular space, and the electric variable speed motor includes a stator group and a rotor group. The stator assembly includes a stator bracket, and the stator bracket is fixed to the housing. The rotor assembly includes a rotor bracket that is coupled to the power input member.

In an embodiment, the compound variable speed motor may further include a rotor one-way bearing connected between the power input member and the rotor bracket of the rotor group.

In an embodiment, the rotor bracket may include a central constricted portion and an outer ring portion, the outer ring portion surrounds the stator bracket, and the central constricted portion is sleeved outside the one-way bearing of the rotor.

In an embodiment, the compound variable speed motor may further include a drive wheel coupled to the power input of the internal transmission to selectively drive the power input member to rotate.

In an embodiment, the compound variable speed motor may further include an input one-way bearing, and the input one-way bearing is coupled between the driving wheel and the power input member.

In an embodiment, the compound variable speed motor may further include a rotor one-way bearing connected between the power input member and the rotor bracket of the rotor group.

In an embodiment, the rotor set may include a plurality of permanent magnet blocks arranged around the rotor support, the stator set includes a plurality of stator units and a plurality of coils, and the stator unit is fixed around the stator support, the coil The windings are respectively wound on the stator unit.

In one embodiment, the stator set is located between the rotor set and the housing of the internal transmission.

In an embodiment, the compound variable speed motor may further include a bearing connected between the rotor bracket of the electric variable speed motor and the outer hub of the hub.

In an embodiment, the internal shifting gear set may include an input shaft tube, and the input shaft tube is sleeved on the middle shaft, and the power input member is fixed to the input shaft tube to drive the input shaft tube to rotate synchronously.

In an embodiment, an electric vehicle (such as an electric bicycle or an electric motor vehicle) is further provided, including a wheel and the above composite variable speed motor, and the wheel includes a wheel carrier. A compound variable speed motor is secured to the wheel carrier to selectively drive wheel rotation.

In summary, the compound variable speed motor of the present embodiment is integrated into the hub by the electric shifting motor and the internal transmission, so that the internal shifting type shifting device can greatly increase the variable speed range in a limited space, thereby improving the compound variable speed motor. Benefits and scope of use.

1 and 2 are a perspective view and an exploded perspective view of an embodiment of a composite variable speed motor. Referring to FIGS. 1 and 2, in the present embodiment, the compound variable speed motor 1 includes an internal transmission 10, a hub 20, and an electric variable speed motor 30.

The internal transmission 10 includes a central shaft 11 and a power input member 12, a housing 13 and a power output member 14 which are sequentially disposed along the central shaft 11. The housing 13 houses an internal transmission gear set 15 and the internal transmission gear set 15 is connected to the power input. Between the piece 12 and the power take-off 14 . In this embodiment, the housing 13 is a cylindrical housing, the power input member 12 is a ring block, and the power input member 12 is located at one end of the housing 13 and is pivoted on the central shaft 11 so that the power input member 12 can be opposite to the power input member 12 The center shaft 11 rotates. The power output member 14 is also a ring block, and the power output member 14 is located at the other end of the housing 13 and is pivoted on the center shaft 11 to enable the power output member 14 to rotate relative to the center shaft 11.

As shown in FIG. 4, in an embodiment, the internal shifting gear set 15 may specifically include a plurality of gears to achieve a shifting function by changing different gear ratios. For example, the internal shift gear set 15 has a plurality of sun gears fixed to the center shaft 11, a planetary gear set meshing around each of the sun gears, and a ring gear meshing with each of the planetary gear sets. Thereby, the gear ratio can be changed to achieve the shifting speed by engaging the sun gears with different planetary gear sets or ring gears (for example, by moving the middle shaft 11 to drive the sun gear displacement to mesh with different planetary gear sets or ring gears). The function. The embodiment of the above internal shifting gear set 15 is for illustrative purposes only, and the internal shifting gear set 15 can also achieve the shifting function by other types of gear matching. Since the internal shifting gear set 15 is a well-known technique in the art, it will not be described here. .

In one embodiment, the power input member 12, the internal transmission gear set 15 and the power output member 14 are in mesh with each other. For example, the power input member 12 includes a gear, and the power output member 14 also includes a gear to power the power input member 12 and the power. The output member 14 is engageable with the internal shifting gear set 15 by gears. Thereby, when the power input member 12 rotates, the internal shift gear set 15 can be driven to synchronously drive the power output member 14 to rotate. In some embodiments, the power input member 12 and the power output member 14 can also be directly connected (eg, thermally fused or snapped) to the gear of the internal shift gear set 15, which is not limited.

As shown in FIGS. 2 and 3, the hub 20 is a hollow housing and includes a central portion 21 and an outer hub portion 22. The central portion 21 is fixed to the power output member 14 and can rotate with the power output member 14. The portion 22 surrounds the outside of the housing 13 and forms an annular space 23 with the housing 13. In the present embodiment, the central portion 21 is a power output member 14 that is close to the internal transmission 10, and the central portion 21 has a tapered shape and has an opening for the central shaft 11 to pass through. Here, the central portion 21 defines a ring sleeve 211 extending inwardly, and the ring sleeve 211 is sleeved and fixed to the outside of the power output member 14. For example, the ring sleeve 211 and the power output member 14 of the central portion 21 may be in a tightly fitted state with each other. A fixed action is achieved to cause the hub 20 to rotate synchronously when the power output member 14 rotates. In some embodiments, the central portion 21 and the power output member 14 can also be fixed to each other by meshing, snapping or cementing, etc., which is not limited.

As shown in FIG. 4, in an embodiment, the internal transmission gear set 15 includes an input shaft tube 151. The input shaft tube 151 is sleeved outside the center shaft 11 and rotatable relative to the center shaft 11, and the power input member 12 is fixed to the motor. The input shaft tube 151 can drive the input shaft tube 151 to rotate synchronously. In the present embodiment, the power input member 12 is engaged with one end of the input shaft tube 151 to drive the input shaft tube 151 to drive the internal shift gear set 15 in the housing 13 when the power input member 12 rotates. In one embodiment, the input shaft tube 151 is located inside the casing 13 with respect to the one end of the power input member 12 and has a gear to engage the corresponding gear of the internal shift gear set 15, so that the power input member 12 can drive the internal shift gear set. 15 operations. In some embodiments, the power input member 12 and the input shaft tube 151 may also be integrally formed.

As shown in Fig. 3, in the present embodiment, the outer hub portion 22 of the hub 20 is connected to the center portion 21. The outer hub portion 22 is an annular hollow casing and surrounds the outer casing 13 of the inner transmission 10, and forms an annular space 23 between the outer hub portion 22 and the casing 13.

The electric variable speed motor 30 is accommodated in the annular space 23, and the electric variable speed motor 30 includes a stator assembly 31 and a rotor assembly 35. The stator assembly 31 includes a stator bracket 32. The stator bracket 32 is fixed on the housing 13, and the rotor assembly 35 includes a rotor bracket. 36. The rotor bracket 36 is coupled to the power input member 12.

As shown in the second and third embodiments, in the embodiment, the stator bracket 32 is a ring frame and has a central through hole. The stator bracket 32 is sleeved outside the casing 13 and the stator bracket 32 and the casing 13 can pass through. They are fixed to each other by tight fitting, adhesion or fastening. In one embodiment, the stator assembly 31 includes a plurality of stator units 33 and a plurality of coils 34. The stator units 33 are block and are arranged around the stator support 32. The coils 34 are wound on the stator unit 33, respectively.

As shown in FIGS. 2 and 3, in the present embodiment, the rotor holder 36 is a ring frame and includes a central constriction portion 361 and an outer ring portion 362, wherein the outer ring portion 362 is a ring wall and surrounds the stator assembly 31. The outer ring portion 362 has a spacing distance from the stator assembly 31, and the central cutout portion 361 is a ring and is integrally connected to the outer ring portion 362. The central cutout portion 361 is further disposed outside the hub 20 and facing the internal transmission 10. The power input member 12 extends in the direction, and the end of the central cutout portion 361 is further connected to the power input member 12. Here, the central cutout portion 361 is indirectly connected to the power input member 12 through a rotor one-way bearing 40, specifically The rotor one-way bearing 40 is sleeved and fixed outside the power input member 12, and the central cutout portion 361 is sleeved and fixed outside the rotor one-way bearing 40, so that the rotor one-way bearing 40 is connected to the power input member 12 and the rotor. Between the rotor holders 36 of the group 35, and rotating the rotor holder 36 in one direction, the power input member 12 can be rotated. For example, the rotation of the rotor holder 36 in the clockwise direction can drive the power input member 12 to rotate, and vice versa. It will not move in the counterclockwise direction Enter 12. In some embodiments, the rotor bracket 36 can also be directly connected to the power input member 12, for example, the rotor bracket 36 and the power input member 12 can be fixed to each other by adhesion, snapping or meshing, so that the rotor bracket 36 rotates. It is also possible to drive the power input member 12 to rotate. Alternatively, in an embodiment, the rotor support 36 can also be coupled to the power input member 12 via a bidirectional bearing, which is not limited.

As shown in FIGS. 2 and 3, the rotor group 35 includes a plurality of permanent magnet blocks 37 which are spaced apart from each other around the rotor holder 36. In the present embodiment, the plurality of permanent magnet blocks 37 are fixed (eg, adhered or snapped) on the inner side of the outer ring portion 362 such that the plurality of permanent magnet blocks 37 surround the stator group 31. Thereby, when the coil 34 of the stator assembly 31 is energized, the rotor holder 36 can be driven to rotate to synchronously drive the power input member 12 to rotate. In one embodiment, the electric variable speed motor 30 can change the voltage frequency of the input coil 34 by a variable frequency controller to achieve the function of multi-step shifting. Alternatively, in some embodiments, the electric variable speed motor 30 can also achieve the function of multi-step shifting by varying the number of energized coils 34 or changing the arrangement of the coils 34.

As shown in Fig. 3, in the present embodiment, the stator group 31 is located between the rotor group 35 and the casing 13 of the internal transmission 10, and the rotor group 35 is formed around the stator group 31. In some embodiments, the rotor set 35 can also be pivoted outside of the housing 13 with the stator set 31 surrounding the rotor set 35. Alternatively, the rotor group 35 and the stator group 31 may be side by side, and this portion is not limited.

As shown in FIG. 3, in one embodiment, a bearing 70 (e.g., a bidirectional bearing) is coupled between the rotor support 36 of the electric variable speed motor 30 and the outer hub portion 22 of the hub 20. The rotor bracket 36 and the outer hub portion 22 are connected to each other, and the rotor bracket 36 does not directly drive the hub 20 when rotated, but directly drives the power input member 12 to rotate, so that the power generated by the electric shift motor 30 is transmitted via the internal shift gear set 15 After the shifting, the power output member 14 is further rotated to rotate the hub 20 and the power output member 14 in synchronization.

As described above, by integrating the electric shift motor 30 and the internal transmission 10 into the hub 20, the internal shift type shifting device can greatly increase the variable speed range in a limited space, thereby improving the use efficiency of the compound shifting motor 1 and Scope of application. In detail, since the power generated by the electric shifting motor 30 is shifted by the internal shifting gear set 15, the power output member 14 is rotated to rotate the hub 20 and the power output member 14 in synchronization. Therefore, the multi-speed shifting of the electric shifting motor 30 and the multi-step shifting of the internal transmission 10 can generate a larger shifting range, thereby improving the use efficiency and the applicable range of the compound shifting motor 1.

As shown in FIGS. 6 and 7, in an embodiment, the compound variable speed motor 1 can be mounted to the wheel frame 4 fixed to the wheel 3 of the electric vehicle 2 (here, the rear wheel of the electric bicycle or the electric motor vehicle), for example, The hub 20 and the carrier 4 of the compound shifting motor 1 can be fixed to each other, whereby the hybrid shifting motor 1 can drive the wheels 3 of the electric vehicle 2 to rotate.

Further, as shown in FIGS. 2 and 3, the compound variable speed motor 1 further includes a drive wheel 50 coupled to the power input member 12 of the internal transmission 10 to selectively drive the power input member 12 to rotate. In the present embodiment, the driving wheel 50 is a bicycle toothed disk for driving the chain of the bicycle to manually drive the driving wheel 50 to rotate to synchronously drive the power input member 12 to rotate. Thereby, the user can select to drive the power input member 12 in one of the manual or electric variable speed motors 30.

Specifically, the following combinations of the driving wheel 50, the power input member 12 and the electric variable speed motor 30 are as follows:

In one embodiment, the power input member 12 is coupled to the power input member 12 via an input one-way bearing 60, and the rotor support 36 of the electric variable speed motor 30 is coupled to the power input member 12 via a rotor one-way bearing 40. As shown in FIG. 3, in the present embodiment, the input one-way bearing 60 is connected between the driving wheel 50 and the power input member 12, and the rotor one-way bearing 40 is connected to the power input member 12 and the rotor group 35. Between the rotor brackets 36. In one embodiment, the power input member 12 is sleeved outside the input one-way bearing 60. The drive wheel 50 is located on one side of the power input member 12 relative to the housing 13 and is pivotally mounted to the central shaft 11. The drive wheel 50 includes a central ring 501 extending integrally toward the inner transmission 10, and the input one-way bearing 60 is tightly sleeved outside the central ring 501. Thereby, when the rotational speed of the rotor support 36 of the electric variable speed motor 30 is faster than the rotational speed of the drive wheel 50, the power input member 12 is rotated according to the rotational speed of the electric variable speed motor 30 without synchronously driving the drive wheel 50 to rotate to provide Security on the use.

As shown in FIG. 5, in an embodiment, a plurality of ribs 502 may be axially disposed on the outer portion of the central ring 501, and a plurality of grooves 601 corresponding to the ribs 502 may be disposed in the input one-way bearing 60 to drive the wheel 50. When the central ring 501 is inserted into the input one-way bearing 60, the plurality of ribs 502 can be correspondingly embedded in the plurality of grooves 601. Alternatively, in some embodiments, the central ring 501 and the input one-way bearing 60 may also be assembled by screwing, snapping, etc., and this portion is not limited.

In some embodiments, the drive wheel 50 is coupled to the power input member 12 via an input one-way bearing 60, and the rotor support 36 of the electric variable speed motor 30 is directly coupled (eg, glued, snapped, or engaged) to the power input member 12. Alternatively, the drive wheel 50 is directly coupled (e.g., glued, snapped, or engaged) to the power input member 12, and the rotor support 36 of the electric variable speed motor 30 is coupled to the power input member 12 by a rotor one-way bearing 40. Alternatively, the drive wheel 50 and the rotor support 36 of the electric variable speed motor 30 are directly connected (e.g., adhered, snapped or engaged) to the power input member 12 (not shown in the above embodiment), and this portion is not limited.

Although the technical content of the present invention has been disclosed in the above preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with the art, and some modifications and refinements that do not depart from the spirit of the present invention should be included in the creation. Therefore, the scope of protection of this creation is subject to the definition of the scope of the patent application.

1‧‧‧Composite variable speed motor
2‧‧‧Electric vehicles
3‧‧‧ Wheels
4‧‧‧round frame
10‧‧‧Internal transmission
11‧‧‧ center axis
12‧‧‧Power input parts
13‧‧‧Shell
14‧‧‧Power output parts
15‧‧‧Internal gear set
151‧‧‧Input shaft tube
20‧‧·wheels
21‧‧‧Central Department
211‧‧‧
22‧‧‧Outer hub
23‧‧‧Circular space
30‧‧‧Electric variable speed motor
31‧‧‧stator group
32‧‧‧stator bracket
33‧‧‧stator unit
34‧‧‧ coil
35‧‧‧Rotor group
36‧‧‧Rotor bracket
361‧‧‧Central Contracting Department
362‧‧‧Outer Rings
37‧‧‧ permanent magnet block
40‧‧‧Rotor one-way bearing
50‧‧‧ drive wheel
501‧‧‧Central ring
502‧‧‧ Ribs
60‧‧‧Input one-way bearing
601‧‧‧ Groove
70‧‧‧ bearing

[Fig. 1] is a perspective view showing an embodiment of a composite variable speed motor. [Fig. 2] is an exploded perspective view showing an embodiment of the present hybrid speed changing motor. [Fig. 3] is a cross-sectional view showing an embodiment of the present hybrid variable speed motor. [Fig. 4] is a perspective cross-sectional view showing an embodiment of the present internal transmission. [Fig. 5] is an exploded perspective view showing another embodiment of the present driving wheel and the input one-way bearing. [Fig. 6] is a partial schematic view of a composite variable speed motor applied to an electric bicycle. [Fig. 7] is a partial schematic view of a composite variable speed motor applied to an electric motor vehicle.

10‧‧‧Internal transmission

11‧‧‧ center axis

12‧‧‧Power input parts

13‧‧‧Shell

14‧‧‧Power output parts

151‧‧‧Input shaft tube

20‧‧·wheels

21‧‧‧Central Department

211‧‧‧

22‧‧‧Outer hub

31‧‧‧stator group

32‧‧‧stator bracket

33‧‧‧stator unit

34‧‧‧ coil

35‧‧‧Rotor group

36‧‧‧Rotor bracket

361‧‧‧Central Contracting Department

362‧‧‧Outer Rings

37‧‧‧ permanent magnet block

40‧‧‧Rotor one-way bearing

50‧‧‧ drive wheel

60‧‧‧Input one-way bearing

70‧‧‧ bearing

Claims (11)

A compound variable speed motor includes: an internal transmission including a central shaft and a power input member, a casing and a power output member sequentially disposed along the central shaft, wherein the housing houses an internal shifting gear set, An inner shifting gear set is coupled between the power input member and the power output member; a hub includes a central portion and an outer hub portion, the central portion being fixed to the power output member for being rotatable with the power output member The outer hub portion surrounds the outer casing and forms an annular space with the outer casing; and an electric variable speed motor is accommodated in the annular space, the electric variable speed motor includes a certain subset and a rotor set, the stator The set includes a stator bracket that is secured to the housing, the rotor assembly including a rotor bracket that is coupled to the power input member. The compound variable speed motor of claim 1 further comprising a rotor one-way bearing coupled between the power input member and the rotor bracket of the rotor assembly. The compound variable speed motor of claim 2, wherein the rotor bracket comprises a central constriction portion and an outer ring portion, the outer ring portion surrounding the stator bracket, the central constriction portion being sleeved on the rotor One-way bearing. The compound variable speed motor of claim 1 further comprising a drive wheel coupled to the power input member of the internal transmission to selectively drive the power input member to rotate. The compound variable speed motor of claim 4, further comprising an input one-way bearing coupled between the drive wheel and the power input member. The compound variable speed motor of claim 5, further comprising a rotor one-way bearing coupled between the power input member and the rotor bracket of the rotor assembly. The compound variable speed motor of claim 1, wherein the rotor set comprises a plurality of permanent magnet blocks arranged around the rotor support, the stator set comprising a plurality of stator units and a plurality of coils, The stator units are fixed around the stator bracket, and the coils are respectively wound on the stator units. The compound variable speed motor of claim 1 wherein the stator set is between the rotor set and the housing of the internal transmission. The compound variable speed motor of claim 1 further comprising a bearing coupled between the rotor bracket of the electric variable speed motor and the outer hub of the hub. The hybrid variable speed motor of claim 1, wherein the internal shifting gear set includes an input shaft tube, the input shaft tube is sleeved on the central shaft, and the power input member is fixed to the input shaft tube to drive the The input shaft tube rotates synchronously. An electric vehicle comprising: a wheel including a wheel carrier; and a compound variable speed motor according to any one of claims 1 to 10, wherein the compound variable speed motor is fixed to the wheel frame to selectively drive the wheel Turn.