A deceleration mechanism mounting assembly and its single-sided motor

Abstract

This utility model relates to a reduction gear assembly and its single-sided motor, including a planetary gear mechanism. The planetary gear mechanism includes a ring gear, a sun gear, and several planetary teeth. The planetary teeth mesh with the outer circumferential surfaces of the sun gear and with the inner circumferential surfaces of the ring gear. It also includes a stator support, comprising an outer ring, with the outer circumferential surface of the ring gear fixed to the inner circumferential surface of the outer ring. The stator support further includes an inner ring located on the inner circumferential surface of the outer ring, positioned near the edge of the inner circumferential surface of the outer ring, with the ring gear located on the side of the inner ring. This utility model utilizes the stator support as the mounting housing for the planetary gear mechanism, integrating the planetary gear mechanism into the motor. This ensures transmission efficiency, reduces assembly errors, simplifies the structure, improves the internal space utilization of the motor, compresses the axial space of the motor, significantly reduces the overall axial dimension, and reduces the motor's volume, meeting the installation requirements of compact vehicles.

Description

Technical Field

[0001] This utility model relates to a speed reduction mechanism mounting assembly and its single-sided motor, belonging to the field of hub motor technology. Background Technology

[0002] Most existing hub motors are dual-axle motors, meaning the motor shafts protrude from both sides of the hub motor. During assembly, both motor shafts are fixed to the rear swingarm of the electric vehicle. Dual-axle hub motors require complete removal for maintenance and tire replacement, making disassembly and assembly complex. Another type of hub motor is the single-axle motor, which is easier to disassemble and assemble than the common dual-axle hub motors. However, in current electric vehicle drive systems, single-axle motors are usually arranged separately from the reduction gear mechanism; that is, the motor output shaft is connected to a separate reduction gearbox via a coupling or transmission device before transmitting power to the wheels or the transmission system. However, this traditional structure has the following technical problems: 1. Large axial space occupation: The separate design of the motor and gearbox leads to an increase in the overall axial length, which is not conducive to the optimized layout of the electric vehicle chassis space. Especially in compact vehicles or integrated electric drive systems, the excessively long axial dimension will restrict the arrangement of other key components; 2. Reduced transmission efficiency: The split structure requires additional mechanical connections (such as couplings, gear pairs, etc.), which not only increases the possibility of assembly errors, but also introduces additional friction losses, reduces the system transmission efficiency, and affects the energy consumption performance of electric vehicles. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing a speed reduction mechanism mounting assembly with reduced axial dimensions and its single-sided motor.

[0004] To achieve this objective, the technical solution adopted by this utility model is:

[0005] A speed reduction mechanism assembly includes a planetary gear mechanism, which includes a ring gear, a sun gear, and a plurality of planetary teeth. The planetary teeth mesh with the outer peripheral surfaces of the sun gear and with the inner peripheral surfaces of the ring gear. The assembly also includes a stator support, which includes an outer ring. The outer peripheral surface of the ring gear is fixed to the inner peripheral surface of the outer ring.

[0006] As a further optimization of the above technical solution: the stator support also includes an inner ring of the support located on the inner circumferential surface of the outer ring of the support, the inner ring of the support is set close to the edge of the inner circumferential surface of the outer ring of the support, and the gear ring is located on the side of the inner ring of the support.

[0007] As a further optimization of the above technical solution: the planetary gear mechanism also includes a planet carrier and a sun gear shaft. The sun gear is sleeved and fixed on the sun gear shaft, which is connected to the rotor. The planet carrier is fixed to all the planetary teeth and is connected to the hub. The rotor drives the sun gear shaft and the sun gear to rotate. The gear ring is fixed with the stator support. The planetary teeth drive the planet carrier to rotate and complete the rotation of the hub.

[0008] As a further optimization of the above technical solution: the side of the planetary carrier protrudes to form a guide ring, a first bearing is provided between the inner circumferential surface of the guide ring and the sun gear shaft, and a second bearing is provided between the outer circumferential surface of the guide ring and the inner circumferential surface of the inner ring of the support.

[0009] As a further optimization of the above technical solution: a planetary carrier cover is also installed on the side of the planetary carrier, a hub connecting seat is fixed on the hub, and the shank of the screw passes through the hub connecting seat and is fixed on the planetary carrier cover to connect the planetary carrier to the hub.

[0010] A single-sided motor includes a reduction mechanism mounting assembly as described in the above technical solution, and also includes a stator core sleeved on the outer peripheral surface of the stator support. The stator core is wound with windings, and insulating plates are provided on both sides of the stator core. The stator core, the stator support, the windings, and the insulating plates together constitute the stator.

[0011] As a further optimization of the above technical solution: the rotor is sleeved on the stator, the rotor includes a magnetic ring sleeved on the stator core and a plurality of magnets, the plurality of magnets are fixed on the inner circumferential surface of the magnetic ring and distributed circumferentially along the inner circumferential surface of the magnetic ring, a connecting frame is provided on the side of the magnetic ring, the connecting frame is sleeved and fixed on the sun gear shaft, the magnetic ring starts to rotate, the magnetic ring drives the sun gear shaft to rotate synchronously through the connecting frame.

[0012] As a further optimization of the above technical solution, it also includes a housing and a housing end cover. The housing end cover is installed on the side of the housing, and a first mounting cavity is formed between the housing end cover and the housing. The stator and the rotor are both located in the first mounting cavity.

[0013] As a further optimization of the above technical solution, it also includes a bracket end cover fixed to the side of the stator support. The bracket end cover is fixed to the housing end cover. The bracket end cover is sleeved on the planetary carrier cover through a third bearing. An oil seal is also sleeved on the planetary carrier cover. A second mounting cavity is formed between the bracket end cover and the stator support. The planetary gear mechanism is located in the second mounting cavity.

[0014] Compared with the prior art, this utility model provides a larger reduction ratio for the planetary gears when the motor is driven at high speed, so as to realize the reduction transmission between the magnetic ring and the hub, thereby improving the power density and output torque of the single-sided motor, making the motor speed higher and the power density greater. The stator bracket is used as the mounting housing for the planetary gear mechanism, integrating the planetary gear mechanism into the motor. This ensures transmission efficiency, reduces assembly errors, simplifies the structure, and improves the internal space utilization of the motor. It also compresses the axial space of the motor, greatly reducing the overall axial dimension and the volume of the motor, meeting the installation requirements of compact vehicles. A second mounting cavity is formed between the bracket end cover and the stator bracket. The planetary gear mechanism is located in the second mounting cavity, and the oil seal prevents the oil that lubricates the planetary gear mechanism in the second mounting cavity from leaking outward. Attached Figure Description

[0015] Figure 1 This is a cross-sectional structural diagram of the present invention.

[0016] Figure 2 This is an exploded structural diagram of the present invention. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. For example... Figure 1-2 As shown, a speed reduction mechanism assembly includes a planetary gear mechanism 2, which includes a ring gear 21, a sun gear 22, and a plurality of planetary teeth 23. The planetary teeth 23 mesh with the outer circumferential surface of the sun gear 22, and the planetary teeth 23 mesh with the inner circumferential surface of the ring gear 21. It also includes a stator support 1, which includes an outer ring 11 and an inner ring 12 located on the inner circumferential surface of the outer ring 11. The ring gear 21 is located on the side of the inner ring 12, and the outer circumferential surface of the ring gear 21 is fixed to the inner circumferential surface of the outer ring 11.

[0018] In the above technical solution: the planetary gear mechanism 2 further includes a planet carrier 24 and a sun gear shaft 25. The sun gear 22 is sleeved and fixed on the sun gear shaft 25, and the sun gear shaft 25 is connected to the rotor. The planet carrier 24 is fixed to all the planet gears 23, and the planet carrier 24 is connected to the hub 3. The rotor drives the sun gear shaft 25 and the sun gear 22 to rotate. The gear ring 21 is fixed with the stator support 1. The planet gears 23 drive the planet carrier 24 to rotate, thus completing the rotation of the hub 3. A guide ring 26 protrudes from the side of the planet carrier 24. A first bearing 27 is provided between the inner circumferential surface of the guide ring 26 and the sun gear shaft 25, and a second bearing 28 is provided between the outer circumferential surface of the guide ring 26 and the inner circumferential surface of the inner ring 12 of the support.

[0019] In the above technical solution: the inner ring 12 of the bracket is positioned close to the edge of the inner circumference of the outer ring 11 of the bracket, ensuring sufficient space within the outer ring 11 for the installation of the gear ring 21 without increasing the axial dimension of the stator bracket 1. Utilizing the stator bracket 1 as the mounting housing for the planetary gear mechanism 2, the planetary gear mechanism 2 is integrated into the motor, ensuring transmission efficiency, reducing assembly errors, and simplifying the structure; it also improves the internal space utilization of the motor, significantly reducing the overall axial dimension and meeting the installation requirements of compact vehicles.

[0020] In the above technical solution: a planetary carrier cover 29 is also installed on the side of the planetary carrier 24, a hub connecting seat 31 is fixed on the hub 3, the shank of the screw passes through the hub connecting seat 31 and is fixed on the planetary carrier cover 29, connecting the planetary carrier 24 and the hub 3.

[0021] A single-sided motor, including a reduction mechanism assembly as described in the above technical solution, further includes a stator core 4 sleeved on the outer circumferential surface of a stator support 1. Windings are wound on the stator core 4, and insulating plates 5 are provided on both sides of the stator core 4. The stator core 4, stator support 1, windings, and insulating plates 5 together constitute the stator. A rotor is sleeved on the stator and includes a magnetic ring 6 sleeved on the stator core 4 and several magnets 7. The magnets 7 are fixed on the inner circumferential surface of the magnetic ring 6 and distributed circumferentially along the inner circumferential surface of the magnetic ring 6. A connecting frame 8 is provided on the side of the magnetic ring 6. The connecting frame 8 is integrally formed with the magnetic ring 6 or fixedly connected to the magnetic ring 6. The connecting frame 8 is sleeved and fixed on the sun gear shaft 25. After energization, the magnetic ring 6 begins to rotate, and the magnetic ring 6 drives the sun gear shaft 25 to rotate synchronously through the connecting frame 8, thereby realizing the rotor driving the sun gear shaft 25 to rotate.

[0022] The above technical solution also includes a housing 9 and a housing end cover 10. The housing end cover 10 is installed on the side of the housing 9, and a first mounting cavity is formed between the housing end cover 10 and the housing 9. The stator and rotor are both located in the first mounting cavity. It also includes a bracket end cover 13 fixed to the side of the stator support 1. The bracket end cover 13 is fixed to the housing end cover 10. The bracket end cover 13 is sleeved on the planetary carrier cover 29 through a third bearing 14. An oil seal 15 is also sleeved on the planetary carrier cover 29. A second mounting cavity is formed between the bracket end cover 13 and the stator support 1. The planetary gear mechanism 2 is located in the second mounting cavity. The oil seal 15 prevents the oil that lubricates the planetary gear mechanism 2 in the second mounting cavity from leaking outward.

[0023] In this invention, when the motor is driven at high speed, the planetary gear 23 provides a large reduction ratio to achieve reduction transmission between the magnetic ring 6 and the hub 3, thereby improving the power density and output torque of the single-sided motor, resulting in higher motor speed and greater power density. The stator bracket 1 is used as the mounting housing for the planetary gear mechanism 2, integrating the planetary gear mechanism 2 into the motor. This ensures transmission efficiency, reduces assembly errors, and simplifies the structure. It also improves the internal space utilization of the motor, compresses the axial space of the motor, greatly reduces the overall axial dimension, and reduces the volume of the motor, meeting the installation requirements of compact vehicles. A second mounting cavity is formed between the bracket end cover 13 and the stator bracket 1. The planetary gear mechanism 2 is located in the second mounting cavity, and the oil seal 15 prevents the oil used to lubricate the planetary gear mechanism 2 in the second mounting cavity from leaking outward.

[0024] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should fall within the protection scope of this utility model.

Claims

1. A reduction gear mounting assembly comprising a planetary gear mechanism (2) comprising a ring gear (21), a sun gear (22) and a number of planet gears (23) which are in engagement with the outer periphery of the sun gear (22) and which are in engagement with the inner periphery of the ring gear (21), characterized in that It also includes a stator support (1), which includes a support outer ring (11), and the outer circumferential surface of the gear ring (21) is fixed to the inner circumferential surface of the support outer ring (11).

2. The speed reduction mechanism mounting assembly according to claim 1, characterized in that... The stator support (1) also includes an inner ring (12) located on the inner circumferential surface of the outer ring (11) of the support. The inner ring (12) is set close to the edge of the inner circumferential surface of the outer ring (11) of the support, and the gear ring (21) is located on the side of the inner ring (12).

3. The speed reduction mechanism mounting assembly according to claim 2, characterized in that... The planetary gear mechanism (2) further includes a planet carrier (24) and a sun gear shaft (25). The sun gear (22) is sleeved and fixed on the sun gear shaft (25). The sun gear shaft (25) is connected to the rotor. The planet carrier (24) is fixed to all the planet gears (23) and is connected to the hub (3). The rotor drives the sun gear shaft (25) and the sun gear (22) to rotate. The gear ring (21) is fixed with the stator support (1). The planet gears (23) drive the planet carrier (24) to rotate and complete the rotation of the hub (3).

4. A speed reduction mechanism mounting assembly according to claim 3, characterized in that... The planetary carrier (24) has a protruding guide ring (26) on its side. A first bearing (27) is provided between the inner circumferential surface of the guide ring (26) and the sun gear shaft (25). A second bearing (28) is provided between the outer circumferential surface of the guide ring (26) and the inner circumferential surface of the inner ring (12) of the support.

5. A speed reduction mechanism mounting assembly according to any one of claims 3-4, characterized in that... The planetary carrier (24) is also equipped with a planetary carrier cover (29) on its side. A hub connecting seat (31) is fixed on the hub (3). The shank of the screw passes through the hub connecting seat (31) and is fixed on the planetary carrier cover (29), connecting the planetary carrier (24) to the hub (3).

6. A single-sided motor, characterized in that... The assembly includes a speed reduction mechanism as described in claim 5, and also includes a stator core (4) sleeved on the outer circumferential surface of the stator support (1). The stator core (4) is wound with windings, and insulating plates (5) are provided on both sides of the stator core (4). The stator core (4), the stator support (1), the windings and the insulating plates (5) together constitute the stator.

7. The single-sided motor according to claim 6, characterized in that... The rotor is sleeved on the stator. The rotor includes a magnetic ring (6) sleeved on the stator core (4) and several magnets (7). The several magnets (7) are fixed on the inner circumferential surface of the magnetic ring (6) and distributed circumferentially along the inner circumferential surface of the magnetic ring (6). A connecting frame (8) is provided on the side of the magnetic ring (6). The connecting frame (8) is sleeved and fixed on the sun gear shaft (25). When the magnetic ring (6) starts to rotate, the magnetic ring (6) drives the sun gear shaft (25) to rotate synchronously through the connecting frame (8).

8. The single-sided motor according to claim 6, characterized in that... It also includes a housing (9) and a housing end cover (10). The housing end cover (10) is installed on the side of the housing (9). A first mounting cavity is formed between the housing end cover (10) and the housing (9). The stator and the rotor are both located in the first mounting cavity.

9. The single-sided motor according to claim 8, characterized in that... It also includes a bracket end cover (13) fixed to the side of the stator support (1), the bracket end cover (13) being fixed to the housing end cover (10), the bracket end cover (13) being sleeved on the planetary carrier cover (29) via a third bearing (14), the planetary carrier cover (29) being also sleeved with an oil seal (15), a second mounting cavity being formed between the bracket end cover (13) and the stator support (1), and the planetary gear mechanism (2) being located in the second mounting cavity.

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