WO2021217757A1

WO2021217757A1 - Coaxial mid-drive motor

Info

Publication number: WO2021217757A1
Application number: PCT/CN2020/091259
Authority: WO
Inventors: 倪捷; 陈文胜; 吴启皇; 徐嘉伟; 周进宏; 王宇峰
Original assignee: 浙江绿源电动车有限公司
Priority date: 2020-04-30
Filing date: 2020-05-20
Publication date: 2021-11-04
Also published as: CN111452903A

Abstract

Disclosed is a coaxial mid-drive motor, comprising a housing, a bottom bracket, a stator assembly, a rotor assembly, a speed change module, and a clutch module. The stator assembly, the rotor assembly, the speed change module, and the clutch module are located in the housing. The stator assembly is sleeved inside the rotor assembly and connected to the housing. The bottom bracket passes through the stator assembly, the rotor assembly, the speed change module, and the clutch module. The speed change module is connected to the rotor assembly. The clutch module is respectively connected to the bottom bracket and the speed change module. The bottom bracket passes through the housing and protrudes out of the housing. The above design of the present invention enables the axes of the stator assembly, the rotor assembly, the speed change module, and the bottom bracket to coincide with each other, simplifies the entire transmission process, reduces mechanical losses during power output transmission, and does not easily result in wear and tear. The motor generates little noise during operation, and the service life thereof is extended.

Description

A coaxial mid-mounted motor

Technical field

The invention relates to a coaxial mid-mounted motor, in particular to a coaxial mid-mounted motor.

Background technique

In the field of electric-assisted bicycles, the mid-mounted motor refers to a motor in which the drive motor of the electric-assisted bicycle is installed in the middle of the body, that is, the pedal position. The motor is connected to the body and is connected to the rear wheel through a chain to transmit power. At the same time, the motor There are pedals installed on both sides of the bicycle, and the rider can use the pedals to realize the human riding of the bicycle, or choose the way of riding the motor with the human power. In the existing market, the axis of the drive shaft of the central motor and the drive shaft of the pedal crank do not overlap, and there is a large mechanical loss in the power output transmission process. The transmission process of the rotor assembly of the motor and the gear transmission mechanism is complicated, which is easy to cause wear, and the noise during the operation of the motor is large, which affects the service life of the motor. Therefore, it needs to be improved.

Summary of the invention

The present invention aims at the misalignment of the shaft centers of the drive shaft of the central motor and the drive shaft of the pedal crank existing in the prior art, and the transmission process of the rotor assembly of the motor and the gear transmission mechanism is complicated, which is easy to cause wear, and the motor is noisy during operation. Defects affecting the service life of the motor provide a new coaxial mid-mounted motor.

In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

A coaxial mid-mounted motor includes a casing, a bottom bracket, a stator assembly, a rotor assembly, a transmission module, and a clutch module. The stator assembly, the rotor assembly, the transmission module, and the clutch module are located in the Inside the casing, the stator assembly is sleeved inside the rotor assembly and connected to the casing, and the central shaft passes through the stator assembly, the rotor assembly, the transmission module, and the clutch module The speed change module is connected to the rotor assembly, the clutch module is connected to the bottom shaft and the speed change module, respectively, and the bottom shaft passes through the casing and protrudes out of the casing.

The casing provides support, positioning and protection for stator components, rotor components and other components, so that they can be installed and positioned reliably and protected from external forces. When the stator assembly is energized, the driving torque can be generated by the law of electromagnetic induction, so that the rotor assembly rotates relative to the stator assembly. In the present invention, the central shaft passes through the stator assembly, the rotor assembly, the transmission module, and the clutch module at the same time, so that the stator assembly and the rotor assembly can directly provide power for the transmission module. The clutch module is respectively connected with the bottom bracket and the transmission module. On the one hand, the transmission module can directly drive the clutch module and its external components to output power to the outside of the motor. On the other hand, the user can also make the bottom bracket through the external components of the bottom bracket Rotate to directly drive the clutch module and its external components to achieve power output.

Through the above design, the invention makes the axis of the stator assembly, the rotor assembly, the transmission module, and the central shaft coincide, the entire transmission process is simple, the mechanical loss in the power output transmission process is small, and it is not easy to cause abrasion. When the motor is running, the noise is small, which is beneficial to prolong the service life of the motor.

Preferably, in the aforementioned coaxial mid-mounted motor, a central partition is arranged in the casing, and the central partition divides the inside of the casing into a first cavity and a second cavity, The bottom bracket passes through the center partition, the transmission module penetrates the center partition and is connected to the rotor assembly, and the stator assembly and the rotor assembly are arranged in the first cavity, The speed change module and the clutch module are arranged in the second cavity.

By installing the stator assembly and the rotor assembly in the first cavity, and the variable speed module in the second cavity, it is not easy to influence each other, thereby improving the stability and reliability of the present invention.

Preferably, in the aforementioned coaxial mid-mounted motor, the transmission module includes a sun gear and a planetary reduction mechanism, the planetary reduction mechanism is connected to the clutch module, and the sun gear is sleeved on the central shaft. Between the central partition plate, one end of the sun gear is connected with the rotor assembly, and the other end of the sun gear is meshed with the planetary deceleration mechanism.

The sun gear is sleeved outside the central axis and directly connected to the rotor assembly, which can further effectively solve the problem of radial runout caused by the different axial degrees of the rotor assembly and the sun gear, thereby improving the stability of the operating state of the rotor assembly. The gear wear and motor noise are reduced, the service life of the motor is prolonged, and the planetary deceleration mechanism can realize the deceleration effect, so that the present invention has the advantages of stable operation, low noise and high torque.

Preferably, in the above-mentioned coaxial mid-mounted motor, the planetary reduction mechanism includes a planetary carrier, a planetary gear, and an inner ring gear, the planetary gear is arranged on the planetary carrier, and the planetary gear and the The sun gear and the inner gear are engaged, the inner gear is connected with the casing, and the planet carrier is connected with the clutch module.

The planetary carrier provides the installation position for the planetary gear. The planetary gear is used to mesh with the sun gear and the ring gear. The planetary gear rotates on the sun gear and drives the planetary carrier to rotate relative to the ring gear through its rotation, thereby driving the clutch module Realize power output. Fixing the inner gear ring to the casing can ensure the entire power transmission process is more stable.

Preferably, in the aforementioned coaxial mid-mounted motor, the planetary carrier is connected to the sun gear through a bearing.

The planetary support is connected to the sun gear through a bearing, so that the rotation process of the planetary support is more stable while ensuring that it can rotate smoothly.

Preferably, in the above-mentioned coaxial mid-mounted motor, the planetary carrier is connected to the central partition through a bearing.

The planetary carrier is connected to the central partition through a bearing, which ensures smooth rotation of the planetary carrier and makes the rotation process of the planetary carrier more stable.

Preferably, in the aforementioned coaxial mid-mounted motor, a rotor through hole is arranged in the middle of the rotor assembly, and the sun gear is provided with a first bend at a position corresponding to the rotor through hole, and The first bend passes through the rotor through hole and fits with the rotor through hole.

The design of the first bend can achieve rapid and precise positioning during the installation and fixation process of the rotor assembly and the sun gear, simplifying the installation steps.

Preferably, in the aforementioned coaxial mid-mounted motor, the stator assembly is provided with a stator groove at a position corresponding to the first bend, and the stator groove is connected to the first bend. Match.

The stator groove can partially accommodate the sun gear, saving the axial installation space of the sun gear.

Preferably, in the aforementioned coaxial mid-mounted motor, a central partition through hole is arranged in the middle of the central partition, and the sun gear is provided with a second partition at a position corresponding to the central partition through hole. Bending, the second bending passes through the through hole of the central partition plate and is adapted to the through hole of the central partition plate.

The design of the second bend can enable the sun gear and the through hole of the central partition plate to achieve rapid positioning during the installation process, simplifying the installation steps.

Preferably, the aforementioned coaxial mid-mounted motor further includes a sun gear support bearing, and the sun gear support bearing is sleeved between the central shaft and the sun gear.

Setting the sun gear support bearing between the central shaft and the sun gear can make the rotation process of the sun gear smoother and more stable.

Preferably, in the above-mentioned coaxial mid-mounted motor, the sun gear is provided with a semi-closed bearing accommodating groove, and the bearing accommodating groove is matched with the sun gear supporting bearing and accommodates the sun gear Support bearing.

The semi-closed bearing accommodating groove is used to accommodate and protect the sun gear support bearing, provides a relatively stable working environment for the sun gear support bearing, and can also realize the detachable connection between the sun gear support bearing and the sun gear, which is convenient for installation and disassembly.

Preferably, the aforementioned coaxial mid-mounted motor further includes a sun gear pressing plate, the sun gear pressing plate is detachably connected to the bearing accommodating groove, and the sun gear pressing plate is opposite to the sun gear supporting bearing. conflict.

The sun gear pressing plate further fixes the sun gear support shaft to prevent it from displacement due to external forces such as bumps.

Preferably, the above-mentioned coaxial mid-mounted motor further includes a connecting member, the rotor assembly is provided with a rotor connecting hole on the periphery of the rotor through hole, and the first bend is connected to the rotor A sun gear connecting hole is provided at the corresponding position of the connecting hole, the sun gear pressing plate is provided with a pressing plate connecting hole at a position corresponding to the rotor connecting hole, and the connecting piece passes through the rotor connecting hole, the sun gear connecting hole, Pressure plate connection hole.

The connecting piece passes through the rotor connection hole, the sun gear connection hole, and the pressure plate connection hole at the same time, and simultaneously realizes the fixation between the rotor assembly, the sun gear and the sun gear pressure plate, saves design space, and makes the structure of the present invention more compact.

Preferably, the aforementioned coaxial mid-mounted motor further includes a sprocket bracket, and the sprocket bracket is connected to the clutch module.

When in use, the sprocket bracket can be connected to an external sprocket. Driven by the clutch module, the sprocket bracket drives the external sprocket to rotate together to realize the power output of the motor.

Preferably, the above-mentioned coaxial mid-mounted motor further includes a pedal crank, and the pedal crank is connected with the part of the central shaft extending out of the casing.

The pedal crank connected with the central shaft can drive the central shaft to rotate under the action of manpower, and then drive the clutch module through the central shaft to realize the power output of manpower.

Preferably, in the aforementioned coaxial mid-mounted motor, a positioning shaft is provided on the planetary carrier, a positioning connector is provided on the clutch module, and the positioning shaft is adapted to the positioning connector, The planetary carrier and the clutch module are connected by the positioning shaft and the positioning connector, and the planetary gear is sleeved outside the positioning shaft.

The design of the positioning shaft and the positioning connector can realize the rapid installation and fixation of the planetary carrier and the clutch module, and transmit the power of the planetary carrier to the clutch module.

Preferably, in the aforementioned coaxial mid-mounted motor, a first boss is provided on the outer side of the planetary carrier, a second boss is provided on the outer side of the clutch module, and the positioning shaft is provided on the first On the boss, the positioning connector is arranged on the second boss.

The first boss and the second boss respectively provide installation space for the positioning shaft and the positioning connector, so that the spatial layout of the present invention is more reasonable.

Preferably, the above-mentioned coaxial mid-mounted motor includes a clutch outer ring, a clutch middle gear ring, and a clutch inner sleeve that are sleeved from the outside to the inside in sequence, and the clutch inner sleeve is sleeved on The middle shaft is externally connected with the middle shaft by spline connection, the clutch middle gear ring is connected with the sprocket bracket, and the second boss is arranged on the clutch outer ring.

The clutch module adopts the above-mentioned dual-clutch structure to realize the dual-clutch power synthesis output. This structure makes the motor driving force and the human foot force a perfect combination, reduces the structural complexity of the motor, and saves costs.

Preferably, the aforementioned coaxial mid-mounted motor further includes an insulating cooling liquid, and the insulating cooling liquid is located in the first cavity.

The insulating cooling liquid in the first cavity is in a flowing state, and flows inside the casing with the rotation of the rotor assembly, and makes full contact with various heating components for heat exchange, which greatly improves the heat dissipation efficiency.

Preferably, the above-mentioned coaxial mid-mounted motor further includes gear lubricating oil, and the gear lubricating oil is located in the second cavity.

The gear lubricating oil cools the transmission module while lubricating it, effectively reducing the mechanical friction and heat generated by gear meshing, reducing the wear on the surface of the gear teeth, and prolonging the service life of the gear.

Preferably, the aforementioned coaxial mid-mounted motor further includes a sun gear oil seal, and the sun gear oil seal is sleeved between the central shaft and the sun gear.

The sun gear oil seal sleeved between the central shaft and the sun gear plays a role of blocking oil and prevents the oil in the first cavity and the second cavity from penetrating each other.

Preferably, the above-mentioned coaxial mid-mounted motor further includes a middle partition oil seal, and the middle partition oil seal is sleeved between the second bend and the through hole of the center partition.

The middle partition oil seal sleeved between the second bend and the through hole of the middle partition plays a role of blocking oil and prevents the oil in the first cavity and the second cavity from infiltrating each other.

Preferably, the above-mentioned coaxial mid-mounted motor further includes a first oil-proof breathable valve, the first oil-proof breathable valve has an oil-proof breathable membrane built in, and the first cavity is provided with a through The first vent hole, the first oil-proof vent valve is matched with the first vent hole and seals the first vent hole.

The design of the first oil-proof breather valve can ensure the internal and external air pressure balance of the first cavity when the motor is working, reduce the pressure difference between the internal and external pressure of the motor caused by the increase or decrease of the internal temperature of the motor, protect the motor, and prolong the service life of the motor.

Preferably, the aforementioned coaxial mid-mounted motor further includes a second oil-proof breathable valve, the second oil-proof breathable valve is provided with an oil-proof breathable membrane, and the second cavity is provided with a through The second vent hole, the second oil-proof vent valve is matched with the second vent hole and seals the second vent hole.

The design of the second oil-proof breather valve can ensure the internal and external air pressure balance of the second cavity when the motor is working, reduce the pressure difference between the internal and external pressure of the motor caused by the increase or decrease of the internal temperature of the motor, protect the motor, and prolong the service life of the motor.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the components in the first cavity of the present invention;

Figure 2 is a schematic diagram of the structure of the components in the second cavity of the present invention;

Figure 3 is a cross-sectional view of the present invention;

Figure 4 is a partial enlarged view of part A in Figure 3;

Figure 5 is an exploded view of the speed change module and the clutch module in the present invention;

Figure 6 is an exploded view of the present invention;

Fig. 7 is an internal schematic diagram of the first cavity in the present invention;

Fig. 8 is an internal schematic diagram of the second cavity in the present invention;

Figure 9 is a schematic diagram of the structure of the present invention after being installed on the frame.

Detailed ways

The present invention will be further described in detail below in conjunction with accompanying drawings 1-9 and specific embodiments, but they are not a limitation of the present invention:

Example 1

A coaxial mid-mounted motor includes a casing 1, a central shaft 4, a stator assembly 3, a rotor assembly 2, a transmission module 5, and a clutch module 6, the stator assembly 3, the rotor assembly 2, and the transmission module 5. The clutch module 6 is located inside the casing 1, the stator assembly 3 is sleeved inside the rotor assembly 2 and connected to the casing 1, and the central shaft 4 passes through the stator assembly 3. The rotor assembly 2, the speed change module 5, the clutch module 6, the speed change module 5 is connected to the rotor assembly 2, and the clutch module 6 is respectively connected to the center shaft 4 and the speed change The modules 5 are connected, and the central shaft 4 passes through the casing 1 and extends out of the casing 1.

When the motor is energized, the stator assembly 3 is energized, and the rotor assembly 2 and the stator assembly 3 directly generate Lorentz force, and the rotor assembly 2 rotates around the stator assembly 3. The rotor assembly 2 drives the transmission module 5 to rotate. The power of the rotor assembly 2 is transmitted to the clutch module 6 through the transmission module 5 to drive the clutch module 6 to rotate. Finally, the clutch module 6 outputs the power of the motor through an external power output component.

When driving by manpower, the external power component of the bottom bracket 4 drives the bottom shaft 4 to rotate, the bottom bracket 4 drives the clutch module 6 to work, and finally the clutch module 6 outputs the power of the manpower through the external power output component.

Preferably, a central partition 13 is provided in the casing 1, and the central partition 13 divides the inside of the casing 1 into a first cavity 11 and a second cavity 12, and the central shaft 4 passes through The middle partition 13 and the transmission module 5 are connected to the rotor assembly 2 through the middle partition 13, and the stator assembly 3 and the rotor assembly 2 are arranged in the first cavity 11 , The transmission module 5 and the clutch module 6 are arranged in the second cavity 12.

Preferably, the transmission module 5 includes a sun gear 51 and a planetary deceleration mechanism 52, the planetary deceleration mechanism 52 is connected to the clutch module 6, and the sun gear 51 is sleeved on the central shaft 4 and the central partition plate. 13, one end of the sun gear 51 is connected with the rotor assembly 2, and the other end of the sun gear 51 is meshed with the planetary reduction mechanism 52.

Preferably, the planetary reduction mechanism 52 includes a planetary carrier 521, a planetary gear 523, and an inner ring gear 522. The planetary gear 523 is arranged on the planetary carrier 521, and the planetary gear 523 is connected to the sun gear 51, The inner gear ring 522 is engaged, the inner gear ring 522 is connected with the casing 1, and the planet carrier 521 is connected with the clutch module 6.

Preferably, the planet carrier 521 is connected to the sun gear 51 through a bearing.

Preferably, the planetary support 521 is connected to the central partition 13 through a bearing.

Preferably, the rotor assembly 2 is provided with a rotor through hole 21 in the middle, the sun gear 51 is provided with a first bend 511 at a position corresponding to the rotor through hole 21, and the first bend 511 passes through the The rotor through hole 21 is matched with the rotor through hole 21.

Preferably, the stator assembly 3 is provided with a stator groove 31 at a position corresponding to the first bend 511, and the stator groove 31 is adapted to the first bend 511.

Preferably, a central partition through hole 131 is provided in the middle of the central partition 13, the sun gear 51 is provided with a second bend 512 at a position corresponding to the central partition through hole 131, and the second bend The fold 512 passes through the central partition through hole 131 and fits with the central partition through hole 131.

Preferably, a sun gear supporting bearing 513 is further included, and the sun gear supporting bearing 513 is sleeved between the central shaft 4 and the sun gear 51.

Preferably, the sun gear 51 is provided with a semi-closed bearing accommodating groove 514, and the bearing accommodating groove 514 is matched with the sun gear supporting bearing 513 and accommodating the sun gear supporting bearing 513.

Preferably, it further includes a sun gear pressing plate 515, the sun gear pressing plate 515 is detachably connected to the bearing accommodating groove 514, and the sun gear pressing plate 515 is in conflict with the sun gear supporting bearing 513.

Preferably, it further includes a connecting piece 9. The rotor assembly 2 is provided with a rotor connecting hole 22 on the periphery of the rotor through hole 21, and the first bend 511 is provided with a sun at a position corresponding to the rotor connecting hole 22. Wheel connecting hole 516, the sun gear pressing plate 515 is provided with a pressing plate connecting hole 517 at a position corresponding to the rotor connecting hole 22, and the connecting piece 9 passes through the rotor connecting hole 22, the sun gear connecting hole 516,压板连接孔517。 Pressure plate connection hole 517.

Preferably, the sprocket bracket 7 is further included, and the sprocket bracket 7 is connected with the clutch module 6.

Preferably, the pedal crank 8 is also included, and the pedal crank 8 is connected with the part of the central shaft 4 that protrudes from the casing 1.

Preferably, the planetary carrier 521 is provided with a positioning shaft 524, the clutch module 6 is provided with a positioning connector 611, the positioning shaft 524 is adapted to the positioning connector 611, and the planet carrier 521 is connected to the The clutch module 6 is connected by the positioning shaft 524 and the positioning connecting member 611, and the planet gear 523 is sleeved outside the positioning shaft 524.

Preferably, a first boss 525 is provided on the outer side of the planet carrier 521, a second boss 612 is provided on the outer side of the clutch module 6, the positioning shaft 524 is provided on the first boss 525, and the positioning The connecting piece 611 is arranged on the second boss 612.

Preferably, the clutch module 6 includes a clutch outer ring 61, a clutch ring gear 62, and a clutch inner sleeve 63 that are sleeved in sequence from the outside to the inner shaft. The clutch inner sleeve 63 is sleeved outside the middle shaft 4 and It is splined with the bottom shaft 4, the clutch gear 62 is connected with the sprocket bracket 7, and the second boss 612 is provided on the clutch outer ring 61.

Preferably, an insulating cooling liquid 14 is further included, and the insulating cooling liquid 14 is located in the first cavity 11.

Preferably, the gear lubricant 15 is further included, and the gear lubricant 15 is located in the second cavity 12.

Preferably, a sun gear oil seal 518 is further included, and the sun gear oil seal 518 is sleeved between the central shaft 4 and the sun gear 51.

Preferably, it further includes a middle diaphragm oil seal 132 which is sleeved between the second bend 512 and the middle diaphragm through hole 131.

Preferably, it further includes a first oil-proof breathable valve 111, said first oil-proof breathable valve 111 is built-in with an oil-proof breathable membrane, the first cavity 11 is provided with a through first breathable hole 112, the first oil-proof breathable valve 111 An oil-proof vent valve 111 is matched with the first vent hole 112 and seals the first vent hole 112.

Preferably, it further includes a second oil-proof and breathable valve 121, the second oil-proof and breathable valve 121 is built with an oil-proof and breathable membrane, the second cavity 12 is provided with a through second breathable hole 122, the first The second oil-proof vent valve 121 is matched with the second vent hole 122 and seals the second vent hole 122.

During installation, the present invention is fixed to the middle of the frame, the sprocket bracket 7 is externally connected to the sprocket, and the pedal crank 8 is externally connected to the pedal.

When the motor is energized, the stator assembly 3 in the first cavity 11 is energized, the rotor assembly 2 and the stator assembly 3 directly generate Lorentz force, and the rotor assembly 2 rotates around the stator assembly 3. The rotor assembly 2 drives the sun gear 51 to rotate synchronously, the sun gear 51 in turn drives the planet gear 523 in the second cavity 12 to rotate, and the planet gear 523 drives the planet carrier 521 to rotate to complete the power deceleration conversion. The planetary gear 523 drives the clutch outer ring 61 to rotate through the positioning shaft 524 and the positioning connector 611. The clutch outer ring 61 drives the clutch middle gear 62 to rotate through the pawl. Finally, the clutch middle gear 62 drives the sprocket support 7 and the external The sprocket rotates to complete the power output of the motor.

When driving by manpower, the rider pedals on the external pedal, the pedal crank 8 drives the central shaft 4 to rotate, the central shaft 4 drives the clutch inner sleeve 63, and the clutch inner sleeve 63 drives the clutch gear ring 62 through the pawl. Rotation occurs, and finally, the gear ring 62 in the clutch drives the sprocket bracket 7 and the external sprocket to rotate to complete the power output of manpower.

During the movement of the motor, the insulating cooling liquid 14 flows in the first cavity 11, fully contacts the stator assembly 3 and other heat-generating components and exchanges heat, and then transfers the heat to the casing 1 and then radiates to the outside air. At the same time, the gear lubricating oil 15 flows in the second cavity 12, fully contacts the planetary gear 523, the ring gear 522 and other components and performs a lubricating function, transfers heat to the casing 1, and then radiates to the outside air.

As the working time of the motor increases, the temperature in the casing 1 gradually rises, and the air pressure also gradually rises. The gas in the first cavity 11 flows to the outside of the casing 1 through the first oil-proof and breathable valve 111. The gas in the second cavity 12 flows to the outside of the casing 1 through the second oil-proof and breathable valve 121. When the motor stops working, the temperature in the casing 1 gradually decreases, and the air pressure also gradually decreases. The air outside the casing 1 flows into the casing 1 through the first oil-proof breather valve 111 and the second oil-proof breather valve 121.

In short, the above descriptions are only preferred embodiments of the present invention, and any equivalent changes and modifications made in accordance with the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

A coaxial mid-mounted motor includes a casing (1), a central shaft (4), a stator assembly (3), a rotor assembly (2), a transmission module (5), and a clutch module (6). The stator assembly (3) The rotor assembly (2), the transmission module (5), and the clutch module (6) are located inside the casing (1), and the stator assembly (3) is sleeved on the rotor The assembly (2) is internally connected to the casing (1), and is characterized in that: the central shaft (4) passes through the stator assembly (3), the rotor assembly (2), and the transmission module (5) The clutch module (6), the speed change module (5) is connected to the rotor assembly (2), and the clutch module (6) is connected to the bottom shaft (4) and the speed change The modules (5) are connected, and the middle shaft (4) passes through the casing (1) and extends out of the casing (1).
The coaxial mid-mounted motor according to claim 1, characterized in that: a middle partition (13) is provided in the casing (1), and the middle partition (13) divides the casing (1) The interior is divided into a first cavity (11) and a second cavity (12), the middle shaft (4) passes through the middle partition (13), and the transmission module (5) passes through the The partition plate (13) is connected to the rotor assembly (2), the stator assembly (3) and the rotor assembly (2) are arranged in the first cavity (11), and the speed change module (5) The clutch module (6) is arranged in the second cavity (12).
The coaxial mid-mounted motor according to claim 2, characterized in that: the variable speed module (5) includes a sun gear (51) and a planetary reduction mechanism (52), and the planetary reduction mechanism (52) and the The clutch module (6) is connected, the sun gear (51) is sleeved between the middle shaft (4) and the middle partition (13), and one end of the sun gear (51) is connected to the rotor assembly (2) Connected, the other end of the sun gear (51) is meshed with the planetary reduction mechanism (52).
The coaxial mid-mounted motor according to claim 3, characterized in that: the planetary reduction mechanism (52) comprises a planetary carrier (521), a planetary gear (523), and an inner ring gear (522), the The planet gear (523) is arranged on the planet carrier (521), and the planet gear (523) meshes with the sun gear (51) and the ring gear (522), and the ring gear (522) It is connected with the casing (1), and the planet carrier (521) is connected with the clutch module (6).
The coaxial mid-mounted motor according to claim 4, wherein the planetary support (521) is connected to the sun gear (51) through a bearing.
The coaxial mid-mounted motor according to claim 4, characterized in that: the planetary support (521) is connected to the central partition (13) through a bearing.
A coaxial mid-mounted motor according to claim 3, characterized in that: a rotor through hole (21) is provided in the middle of the rotor assembly (2), and the sun gear (51) is in communication with the rotor. The corresponding position of the hole (21) is provided with a first bend (511), and the first bend (511) passes through the rotor through hole (21) and is matched with the rotor through hole (21).
The coaxial mid-mounted motor according to claim 7, characterized in that: the stator assembly (3) is provided with a stator groove (31) at a position corresponding to the first bending (511) , The stator groove (31) is matched with the first bending (511).
A coaxial mid-mounted motor according to claim 8, characterized in that: a through-hole (131) of the central partition is provided in the middle of the central partition (13), and the sun gear (51) is in contact with the central partition (13). The middle partition through hole (131) is provided with a second bend (512) at a corresponding position, and the second bend (512) passes through the middle partition through hole (131) and is connected to the middle partition through hole (131). The through hole (131) is matched.
A coaxial mid-mounted motor according to claim 7, characterized in that it further comprises a sun gear support bearing (513), and the sun gear support bearing (513) is sleeved on the central shaft (4) and Between the sun gear (51).
The coaxial mid-mounted motor according to claim 10, characterized in that: the sun gear (51) is provided with a semi-closed bearing accommodating groove (514), the bearing accommodating groove (514) and the The sun gear support bearing (513) is adapted to and accommodates the sun gear support bearing (513).
The coaxial mid-mounted motor according to claim 11, further comprising a sun gear pressing plate (515), and the sun gear pressing plate (515) is detachably connected to the bearing accommodating groove (514), The sun gear pressing plate (515) conflicts with the sun gear supporting bearing (513).
The coaxial mid-mounted motor according to claim 12, characterized in that it further comprises a connector (9), and the rotor assembly (2) is provided with a rotor connection around the rotor through hole (21). Hole (22), the first bend (511) is provided with a sun gear connecting hole (516) at a position corresponding to the rotor connecting hole (22), and the sun gear pressing plate (515) is connected to the rotor The corresponding position of the hole (22) is provided with a pressure plate connection hole (517), and the connecting piece (9) passes through the rotor connection hole (22), the sun gear connection hole (516), and the pressure plate connection hole (517).
The coaxial mid-mounted motor according to claim 4, characterized in that it further comprises a sprocket bracket (7), and the sprocket bracket (7) is connected with the clutch module (6).
A coaxial mid-mounted motor according to claim 14, characterized in that it further comprises a pedal crank (8), and the pedal crank (8) and the central shaft (4) extend out of the machine The parts outside the shell (1) are connected.
The coaxial mid-mounted motor according to claim 15, characterized in that: the planetary carrier (521) is provided with a positioning shaft (524), and the clutch module (6) is provided with a positioning connector (611) ), the positioning shaft (524) is adapted to the positioning connector (611), and the planet carrier (521) and the clutch module (6) pass through the positioning shaft (524) and the positioning connector ( 611) are connected, and the planetary gear (523) is sleeved outside the positioning shaft (524).
The coaxial mid-mounted motor according to claim 16, characterized in that: a first boss (525) is provided on the outer side of the planetary support (521), and a second boss (525) is provided on the outer side of the clutch module (6). A boss (612), the positioning shaft (524) is arranged on the first boss (525), and the positioning connector (611) is arranged on the second boss (612).
The coaxial mid-mounted motor according to claim 17, characterized in that: the clutch module (6) includes a clutch outer ring (61), a clutch middle gear ring (62), A clutch inner sleeve (63), the clutch inner sleeve (63) is sleeved outside the middle shaft (4) and splined with the middle shaft (4), and the clutch middle gear ring (62) Connected with the sprocket bracket (7), and the second boss (612) is arranged on the clutch outer ring (61).
The coaxial mid-mounted motor according to claim 9, characterized in that it further comprises an insulating cooling liquid (14), and the insulating cooling liquid (14) is located in the first cavity (11).
The coaxial mid-mounted motor according to claim 19, characterized in that it further comprises a gear lubricating oil (15), and the gear lubricating oil (15) is located in the second cavity (12).
The coaxial mid-mounted motor according to claim 20, further comprising a sun gear oil seal (518), and the sun gear oil seal (518) is sleeved on the middle shaft (4) and the Between the sun gear (51).
The coaxial mid-mounted motor according to claim 20, characterized in that it further comprises a middle partition oil seal (132), and the middle partition oil seal (132) is sleeved on the second bend (512). ) And the middle partition through hole (131).
The coaxial mid-mounted motor according to claim 20, further comprising a first oil-proof breathable valve (111), and an oil-proof breathable membrane is built in the first oil-proof breathable valve (111), The first cavity (11) is provided with a through first vent hole (112), and the first oil-proof vent valve (111) is matched with the first vent hole (112) and seals the The first ventilation hole (112).
The coaxial mid-mounted motor according to claim 20, characterized in that it further comprises a second oil-proof breathable valve (121), and the second oil-proof breathable valve (121) is built with an oil-proof breathable membrane, The second cavity (12) is provided with a through second vent (122), and the second oil-proof vent valve (121) is matched with the second vent (122) and seals the The second ventilation hole (122).