CN211592843U - Multi-gear motor and gear shifting hub - Google Patents

Abstract

The utility model relates to a multi-speed motor, which comprises a central shaft, a first motor and a second motor; and a reduction box, wherein the central shaft, the first motor and the second motor are all fixed on the reduction box; Two driving gears are fixed on the second motor; the planetary gear transmission is installed in the reduction box, including a sun gear, a planet carrier, a planetary gear and a ring gear, the sun gear is fixed on the first motor; the connecting gear is fixed On the ring gear, the connecting gear meshes with the second drive gear; the first drive gear is fixed on the planet carrier; the output gear is rotatably mounted on the central shaft, and the output gear meshes with the first drive gear, The output end of the output gear is located at the output hole of the reduction box. The multi-gear motor provided by the utility model can realize multi-gear speed change, large torque output and high speed.

Description

A multi-gear motor and gear-shifting hub

technical field

The utility model relates to a motor of an electric bicycle, in particular to a multi-gear motor and a gear-shifting wheel hub.

Background technique

There are many types of motors for electric bicycles. Most of the existing electric bicycles use a geared motor combined with a motor and a reducer. However, the existing geared motor has a small output torque and a slow speed, and can perform well when climbing or under heavy load. Poor, the driving speed is slow.

Utility model content

In order to solve the above problems, the utility model provides a multi-speed motor capable of realizing multi-speed speed change, large torque output and fast speed. The specific technical scheme is as follows:

A multi-speed motor includes a central shaft, a first motor and a second motor; also includes a reduction box, the central shaft, the first motor and the second motor are all fixed on the reduction box; a second driving gear, the The second driving gear is fixed on the second motor; the planetary gear transmission, the planetary gear transmission is installed in the reduction box, the planetary gear transmission includes a sun gear, a planet carrier, a planetary gear and a ring gear, the sun gear is fixed on a first motor; a connecting gear, which is fixed on the ring gear, and which meshes with the second driving gear; a first driving gear, which is fixed on the planet carrier; an output gear, which is The output gear is rotatably mounted on the central shaft, the output gear meshes with the first driving gear, and the output end of the output gear is located at the output hole of the reduction box.

By adopting the above technical solution, due to the use of two motors, various speed regulation can be realized. One of the motors can control the start and stop of the sun gear, thereby realizing two speed regulation functions. Two kinds of speed regulation functions can be realized by rotating in opposite directions at the same time.

When the first motor is locked from rotating by the controller, the sun gear is fixed, the second motor rotates, the second motor drives the second driving gear to rotate, the second driving gear drives the connecting gear to rotate through the transition gear, and the connecting gear drives the ring gear to rotate , Since the sun gear is fixed, the ring gear drives the planet carrier to rotate through the planetary gear, the planetary carrier drives the first driving gear to rotate, and the first driving gear drives the output gear to rotate.

When the second motor is locked by the controller and does not rotate, the second driving gear locks the connecting gear through the transition gear, the connecting gear locks the ring gear, the ring gear does not rotate, the first motor rotates, the first motor drives the sun gear to rotate, the sun gear The planetary gear is driven to rotate, the planetary gear drives the planetary carrier to rotate, and the planetary carrier drives the output gear to rotate through the first driving gear.

Further, a transition gear is also included, the transition gear is rotatably installed in the reduction box, and the transition gear meshes with the second driving gear and the connecting gear respectively.

By adopting the above technical solution, since the shaft distance between the two motors is relatively large, the transmission between the second driving gear and the connecting gear is realized through the transition gear.

Further, the planetary gear further includes a planetary bearing, the outer ring of the planetary bearing is fixed on the ring gear, and the inner ring of the planetary bearing is fixed on the planet carrier.

By adopting the above technical solutions, the planetary bearing facilitates the rotation of the planetary carrier.

Further, the first driving gear, the transition gear, the connecting gear, the second driving gear and the output gear are all helical gears.

By adopting the above technical solutions, the helical gear transmission is stable, and the impact, vibration and noise are small.

A gear-shifting wheel hub, including a multi-speed motor; a wheel hub, the wheel hub and the central axis are arranged coaxially; an active end cover, the center of the active end cover is rotatably mounted on the central axis, and the active end cover is connected to the output Gear connection, the driving end cover is fixed on one side of the hub; driven end cover, the center of the driven end cover is rotatably mounted on the central shaft, and the driven end cover is fixed on the other side of the hub.

Further, a connecting ring is also included, the connecting ring is fixed on the hub, and the driving end cover and the driven end cover are respectively fixed on both sides of the connecting ring.

By adopting the above technical solution, the connecting ring enables the existing wheel hub to be used directly, and the connecting ring is welded on the wheel hub, which facilitates the installation of the driving end cover and the driven end cover.

Further, bearings are installed between the driving end cover and the driven end cover and the central shaft.

By adopting the above technical solutions, the bearing can reduce friction and have good bearing capacity.

Compared with the prior art, the utility model has the following beneficial effects:

The multi-speed motor provided by the utility model can realize multi-speed speed change, large torque output and fast speed.

Description of drawings

Fig. 1 is a structural schematic diagram of a multi-speed motor;

Figure 2 is a schematic structural diagram of a multi-speed motor with a box cover hidden;

Fig. 3 is the exploded structure schematic diagram of planetary gear transmission;

4 is a cross-sectional view of the planetary gear transmission;

Fig. 5 is the structural representation of output gear;

Fig. 6 is the exploded structure schematic diagram of shifting hub;

FIG. 7 is a cross-sectional view of the shift hub.

Detailed ways

The present utility model will now be further described with reference to the accompanying drawings.

Example 1

As shown in FIGS. 1 to 5 , a multi-speed motor includes a central shaft 8 , a first motor 1 and a second motor 2 ; and also includes a reduction box 9 , a central shaft 8 , a first motor 1 and a second motor 2 are fixed on the reduction box 9; the second driving gear 3, the second driving gear 3 is fixed on the second motor 2; the transition gear 4, the transition gear 4 is rotatably installed in the reduction box 9, the transition gear 4 and the second driving gear 3 meshing; planetary gear 53 transmission, the planetary gear 53 transmission is installed in the reduction box 9, the planetary gear 53 transmission includes a sun gear 55, a planet carrier 54, a planetary gear 53 and a ring gear 52, and the sun gear 55 is fixed on the first motor 1 ; Connecting gear 51, the connecting gear 51 is fixed on the ring gear 52, the connecting gear 51 meshes with the transition gear 4; the first driving gear 56, the first driving gear 56 is fixed on the planet carrier 54; the output gear 6, the output gear 6 rotates Installed on the central shaft 8 , the output gear 6 meshes with the first driving gear 56 , and the output end of the output gear 6 is located at the output hole 91 of the reduction box 9 .

Specifically, the reduction box 9 is provided with a box cover 92 , and the box cover 92 has such an output hole 91 .

Since the shaft distance between the two motors is relatively large, the transmission between the second driving gear 3 and the connecting gear 51 is realized through the transition gear 4 .

The planetary gear 53 further includes a planetary bearing 57 , the outer ring of the planetary bearing 57 is fixed on the ring gear 52 , and the inner ring of the planetary bearing 57 is fixed on the planet carrier 54 . The planet bearing 57 facilitates the rotation of the planet carrier 54 .

The first driving gear 56 , the transition gear 4 , the connecting gear 51 , the second driving gear 3 and the output gear 6 are all helical gears. The helical gear drive is stable, and the impact, vibration and noise are small.

Since two motors are used, various speed regulation can be realized. One of the motors can control the start and stop of the sun gear 55, thereby realizing two speed regulation functions. Two speed regulation functions. A total of four gears can be achieved.

1. When the first motor 1 is locked by the controller and does not rotate, the sun gear 55 is fixed, the second motor 2 rotates, the second motor 2 drives the second drive gear 3 to rotate, and the second drive gear 3 drives the connection through the transition gear 4. The gear 51 rotates, and the connecting gear 51 drives the ring gear 52 to rotate. Since the sun gear 55 is fixed, the ring gear 52 drives the planetary carrier 54 to rotate through the planetary gear 53, the planetary carrier 54 drives the first driving gear 56 to rotate, and the first driving gear 56 drives the output Gear 6 turns.

2. When the second motor 2 is locked by the controller and does not rotate, the second driving gear 3 locks the connecting gear 51 through the transition gear 4, the connecting gear 51 locks the ring gear 52, the ring gear 52 does not rotate, and the first motor 1 rotates, The first motor 1 drives the sun gear 55 to rotate, the sun gear 55 drives the planetary gear 53 to rotate, the planetary gear 53 drives the planetary carrier 54 to rotate, and the planetary carrier 54 drives the output gear 6 to rotate through the first driving gear 56 .

3. When the first motor 1 and the second motor 2 rotate at the same time and rotate in the same direction, the first driving gear 56 drives the output gear 6 to rotate.

4. When the first motor 1 and the second motor 2 rotate at the same time and rotate in opposite directions, the first driving gear 56 drives the output gear 6 to rotate.

Embodiment 2

On the basis of the above embodiment, as shown in Figures 6 and 7, the gear shifting hub includes a multi-speed motor; the hub 71, the hub 71 is arranged coaxially with the central shaft 8; the active end cover 72, the active end The center of the cover 72 is rotatably installed on the central shaft 8, the driving end cover 72 is connected with the output gear 6, the driving end cover 72 is fixed on one side of the hub 71; the driven end cover 73, the center of the driven end cover 73 is rotatably installed on the On the central shaft 8 , the driven end cover 73 is fixed on the other side of the hub 71 .

A connecting ring 74 is also included. The connecting ring 74 is fixed on the hub 71 , and the driving end cover 72 and the driven end cover 73 are respectively fixed on both sides of the connecting ring 74 . The connecting ring 74 enables the existing wheel hub 71 to be used directly. The connecting ring 74 is welded on the wheel hub 71 to facilitate the installation of the driving end cover 72 and the driven end cover 73 .

Bearings are installed between the driving end cover 72 and the driven end cover 73 and the central shaft 8 . Bearings can reduce friction and have good bearing capacity.

Claims (7)

1. A multi-gear motor comprises a central shaft, a first motor and a second motor; it is characterized by also comprising

The central shaft, the first motor and the second motor are all fixed on the reduction gearbox;

the second driving gear is fixed on the second motor;

the planetary gear transmission is arranged in the reduction box and comprises a sun gear, a planet carrier, a planetary gear and a gear ring, and the sun gear is fixed on the first motor;

the connecting gear is fixed on the gear ring and is meshed with the second driving gear;

the first driving gear is fixed on the planet carrier;

the output gear is rotatably installed on the central shaft and meshed with the first driving gear, and the output end of the output gear is located at the output hole of the reduction gearbox.

2. The multi-gear motor according to claim 1, further comprising a transition gear rotatably mounted in the reduction gearbox, the transition gear being engaged with the second drive gear and the connecting gear, respectively.

3. A multiple-gear electric machine according to claim 1, characterised in that the planetary gear further comprises a planetary bearing, the outer ring of which is fixed to the ring gear and the inner ring of which is fixed to the planet carrier.

4. The multi-speed electric motor of claim 1, wherein the first drive gear, the transition gear, the connecting gear, the second drive gear, and the output gear are helical gears.

5. The gear shifting hub is characterized by comprising

A multi-speed electric machine as claimed in claim 1;

the hub is arranged coaxially with the central shaft;

the center of the driving end cover is rotatably arranged on the central shaft, the driving end cover is connected with the output gear, and the driving end cover is fixed on one side of the hub;

the center of the driven end cover is rotatably arranged on the central shaft, and the driven end cover is fixed on the other side of the hub.

6. The shifting hub of claim 5, further comprising a connecting ring secured to the hub, wherein the driving end cap and the driven end cap are secured to opposite sides of the connecting ring.

7. The shift hub of claim 5, wherein bearings are mounted between the drive end cap and the driven end cap and the central shaft.

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