New energy vehicle transmission system locking drive brushless motor

Abstract

The application relates to the technical field of brushless motors, in particular to a brushless motor for locking driving of a new energy vehicle transmission system, which comprises a shell and a shell cover, the shell is clamped at the upper end of the shell cover, a rotor is rotationally connected to the inner middle part of the shell, permanent magnets are fixedly connected to the outer wall of the rotor in the shell, pig iron is fixedly connected to the outer wall of the permanent magnets, an upper partition plate and a lower partition plate are arranged at the upper and lower ends of the inner part of the shell cover respectively, an upper partition sleeve is fixedly connected to the side end face of the upper partition plate close to the lower partition plate, and a lower partition sleeve is fixedly connected to the side end face of the lower partition plate close to the upper partition plate. Compared with the prior art, the application solves the problems that the E-park system in the new energy vehicle transmission system adopts a brush motor, the control precision is high, the carbon brush wear influences the service life and performance, the cost and complexity are increased, the volume and weight are increased due to the additional locking structure, and the reliability and stability are reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brushless motors, particularly to a brushless motor for locking and driving the transmission system of a new energy vehicle. BACKGROUND

[0002] The brushless motor for locking and driving the transmission system of a new energy vehicle is a type of motor specifically designed for the transmission system of a new energy vehicle. It uses brushless DC motor technology, replacing the traditional mechanical commutator and brush with an electronic commutator, achieving higher operating efficiency and longer service life. This motor plays a key role in locking and driving the transmission system of a new energy vehicle, and can quickly lock the transmission system when needed to ensure the stability and safety of vehicle travel, while providing strong power output to meet the power requirements of new energy vehicles under different working conditions. Its high efficiency, reliability, and energy saving characteristics are of great significance to improving the overall performance and driving experience of new energy vehicles.

[0003] In the transmission system of a new energy vehicle, the E-park system plays a crucial role. Traditional E-park systems mostly use brushed motors, which can meet basic locking and operating requirements, but have many shortcomings. For example, the control accuracy of brushed motors requires a high-performance controller system, and high-frequency operation can cause carbon brush wear, affecting the service life and performance of the motor. In addition, to meet the requirements of noise and electromagnetic compatibility (EMC) for driving experience, the hardness of the carbon brush needs to be reduced and the EMC suppression circuit structure needs to be increased, which further increases the cost and complexity. More importantly, traditional brushed motors often require additional independent locking structures to achieve locking functions, which not only increases the size and weight of the system, but also increases the manufacturing cost. At the same time, these additional structures can also affect the reliability and stability of the system.

[0004] Furthermore, we disclose a brushless motor for locking and driving the transmission system of a new energy vehicle to meet the actual needs of high control accuracy, carbon brush wear affecting service life and performance, increasing cost and complexity, and additional locking structures leading to increased size and weight and reduced reliability and stability of the E-park system in the transmission system of a new energy vehicle in the prior art. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a brushless motor for locking and driving the transmission system of a new energy vehicle to solve the problems of high control accuracy, carbon brush wear affecting service life and performance, increasing cost and complexity, and additional locking structures leading to increased size and weight and reduced reliability and stability of the E-park system in the transmission system of a new energy vehicle in the prior art.

[0006] Based on the above purpose, the application provides a new energy vehicle transmission system locking drive brushless motor, which comprises a shell and a shell cover, the shell is connected at the upper end of the shell cover, the inner middle part of the shell is rotationally connected with a rotor, the outer wall of the rotor is fixedly connected with a permanent magnet in the inner part of the shell, the outer wall of the permanent magnet is fixedly connected with pig iron, the inner part of the shell cover is provided with an upper partition plate and a lower partition plate at the upper and lower ends respectively, the side end face of the upper partition plate close to the lower partition plate is fixedly connected with an upper partition sleeve, the side end face of the lower partition plate close to the upper partition plate is fixedly connected with a lower partition sleeve, a plurality of iron cores are sleeved outside the upper partition sleeve and the lower partition sleeve, the side end faces of the upper partition sleeve and the lower partition sleeve away from the iron cores are fixedly connected with winding blocks, the winding blocks are fixedly connected with connecting plates on the side close to the rotor, the connecting plates are arc-shaped, the outer part of the winding blocks is provided with windings, and the connecting plates are distributed at equal angles in the inner part of the shell and have notches between the connecting plates.

[0007] Preferably, the upper and lower ends of the rotor are sleeved with bearings, the two bearings are arranged at the connection with the shell, the rotor is installed on the shell through the bearings, the bearings are made of wear-resistant materials, and the bearings are gap-fitted with the rotor.

[0008] Preferably, the side end faces of the upper partition plate and the lower partition plate are fixedly connected with a plurality of clamping blocks, and the upper partition plate and the lower partition plate are connected with the shell through the clamping blocks.

[0009] Preferably, a plurality of open grooves are uniformly and interval provided at the outer corners of the winding blocks, and the size of the open grooves corresponds to the size of the windings.

[0010] Preferably, the outer wall of the shell is fixedly connected with wiring ports at the two sides of the upper end, the ends of the windings are connected with the wiring ports, and the connection parts of the wiring ports and the windings are provided with insulation protective layers.

[0011] Preferably, a shielding layer is arranged outside the windings, and the shielding layer is used for reducing electromagnetic interference.

[0012] Preferably, the lower end of the shell is fixedly connected with a mounting ring, the outer wall of the mounting ring is fixedly connected with a plurality of connecting plates at equal intervals, the two ends of the connecting plates are fixedly connected with buffer plates, the buffer plates are arranged in an inclined manner, and the buffer plates are made of elastic materials.

[0013] Preferably, the windings are distributed on the winding blocks in a distributed manner, and the adjacent windings are staggered by a certain angle in the circumferential direction.

[0014] Preferably, a lubricating oil groove is arranged above the rotor, the lubricating oil groove is communicated with the position of the bearing, is used for providing lubrication for the bearing when the motor is running, and reduces friction and wear.

[0015] Preferably, a sealing ring made of elastic material is arranged at the connection between the shell and the shell cover to prevent external impurities such as dust and moisture from entering the motor.

[0016] Advantages of the present application:

[0017] 1. The brushless motor for locking and driving the new energy vehicle transmission system ingeniously utilizes the cogging torque characteristics, realizes the transformation of traditional single-function motor to multi-function motor through adjusting the stator core slot shape and matching the magnetic ring and air gap design, which not only increases the cogging torque in the static state, but also considers the control locking and control running functions, thereby greatly reducing the size and complexity of the E-park system. In addition, the use of cogging torque characteristics can also realize the locking function in the non-powered state. When the motor rotor rotates in the traditional motor, the permeance in a small range of the corresponding stator tooth slot on both sides of the permanent magnet changes greatly, causing the change of magnetic field energy storage, thereby generating cogging torque. This torque changes with the change of rotor position, which is a pulsating torque. The cogging torque is caused by the tangential component of the interaction force between the permanent magnet and the stator tooth. When the motor rotor rotates, the change of permeability between the permanent magnet and the stator tooth leads to the change of magnetic field energy storage, thereby generating the tendency to position the rotor at a certain position, i.e. the position with minimum reluctance. By using the above basic principle, the brushless motor is different from the traditional brushless motor which tries to reduce the cogging torque. This motor uses special slot size design and rotor flat top wave magnetization method to achieve smooth and larger cogging torque. The shape of the slot is specially designed to adapt to the interaction between the permanent magnet and the stator tooth, thereby optimizing the generation of cogging torque. This special design includes changing the width, depth or shape of the slot, such as using trapezoidal, arc or other non-standard shapes, to better match the magnetic field distribution of the permanent magnet to meet the locking function in the non-powered state by using its characteristics, further improving the energy saving and safety of the system. This multi-functional integrated design idea not only meets the current pursuit of high platformization and multifunctionalization in the automotive industry, but also provides more possibilities for the development of future new energy vehicles.

[0018] 2、The new energy vehicle transmission system locking drive brushless motor, considering the needs of lightweight, compact and high efficiency, the motor rotor adopts the lightweight design of magnetic ring and shaft integrated injection molding, reduces the moment of inertia of the rotor, improves the response speed of the motor, at the same time, the motor stator effectively utilizes the space through the extension of the terminal, further compresses the overall length, in the manufacturing process, the brushless motor adopts the structure design suitable for automatic equipment, realizes the requirements of fully automatic assembly and test, not only improves the assembly efficiency and product consistency, but also reduces the manufacturing cost, the optimization of structure design and manufacturing process not only meets the high requirements of new energy vehicles on the efficiency and volume of parts, but also contributes to the sustainable development of automobile industry.

[0019] 3、The new energy vehicle transmission system locking drive brushless motor, using gear and shaft sleeve structure, the traditional interference fit of ball bearing is changed to sliding fit, this improvement reduces the stress of bearing inner ring, thereby effectively reduces the noise in the running process, at the same time, the motor rotor uses the lightweight design of magnetic ring and shaft integrated injection molding, reduces the moment of inertia of the rotor, improves the response speed of the motor, this change also indirectly reduces the vibration and noise caused by rotation, in addition, through optimizing the winding process and welding method, the overall balance and stability of the motor are improved, further reducing the interference of noise, therefore, the brushless motor can maintain a low noise level during operation, providing a more quiet and comfortable experience for the driver and passenger, enhancing the user experience and market competitiveness of the product.

[0020] 4、The new energy vehicle transmission system locking drive brushless motor is provided with a damping assembly composed of a mounting ring, a connecting sheet and a buffer sheet, which is of great significance to the stable operation of the brushless motor. First of all, it significantly improves the anti-shock performance of the motor, enabling the motor to operate more stably when subjected to external impact or vibration, reducing noise and wear caused by vibration and prolonging the service life of the motor. Secondly, the damping assembly helps to improve the driving comfort and safety of the vehicle. In new energy vehicles, the motor as a key component of the transmission system directly affects the driving quality of the vehicle and the riding experience of the passengers. By reducing the vibration and noise of the motor, the damping assembly provides a more quiet and comfortable driving environment for passengers, and it also helps to improve the overall performance of the vehicle, making new energy vehicles more competitive in the market. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present application or prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only a part of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0022] Figure 1 is a schematic view of the internal structure of the present application;

[0023] Figure 2 is a schematic view of the internal structure of the present application;

[0024] Figure 3 is a schematic view of the internal structure of the present application;

[0025] Figure 4 is a schematic view of the internal structure of the present application;

[0026] Figure 5 is a schematic view of the internal structure of the present application;

[0027] Figure 6 is a schematic view of the internal structure of the present application;

[0028] Figure 7 is a schematic view of the internal structure of the present application; Figure 5 is an enlarged view of A in the figure;

[0029] Figure 8 is a schematic view of the internal structure of the present application;

[0030] Figure 9 is a schematic view of the internal structure of the present application;

[0031] is marked as:

[0032] 1, housing; 2, housing cover; 3, bearing; 4, wiring port; 5, winding; 6, rotor; 7, connecting plate; 8, iron core; 9, upper spacer sleeve; 10, lower spacer sleeve; 11, permanent magnet; 12, pig iron; 13, notch; 14, open slot; 15, mounting ring; 16, connecting piece; 17, buffer piece; 18, upper partition plate; 19, lower partition plate; 20, winding block; 21, clamping block; 22, lubricating oil groove. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with specific embodiments.

[0034] It should be noted that the technical terms or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art to which the present application belongs, unless otherwise defined. The "first", "second" and similar words used in the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent the relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0035] As shown in Figures 1 to 9 The new energy vehicle transmission system locking drive brushless motor, comprising a shell 1 and a shell cover 2, the shell 1 is clamped on the upper end of the shell cover 2, the inner middle part of the shell 1 is rotatably connected with a rotor 6, the outer wall of the rotor 6 is fixedly connected with a permanent magnet 11 in the shell 1, the outer wall of the permanent magnet 11 is fixedly connected with a pig iron 12, the inner upper and lower ends of the shell cover 2 are respectively provided with an upper partition plate 18 and a lower partition plate 19, the side end face of the upper partition plate 18 close to the lower partition plate 19 is fixedly connected with an upper partition sleeve 9, the side end face of the lower partition plate 19 close to the upper partition plate 18 is fixedly connected with a lower partition sleeve 10, a plurality of iron cores 8 are sleeved on the outer part of the upper partition sleeve 9 and the lower partition sleeve 10, the side end faces of the upper partition sleeve 9 and the lower partition sleeve 10 away from the iron cores 8 are both fixedly connected with winding blocks 20, the side of the plurality of winding blocks 20 close to the rotor 6 is fixedly connected with a connecting plate 7, the connecting plate 7 is arc-shaped, the outer part of the winding block 20 is wound with a winding 5, the connecting plate 7 is distributed at equal angles in the shell 1 and has a notch 13 between each connecting plate 7.

[0036] The brushless motor integrates the locking and driving functions, optimizes the structure of the traditional E-park system, reduces the volume and cost, and improves the efficiency and reliability of the system. It adopts direct current brushless technology, has the characteristics of low noise, low energy consumption, high response speed, etc., and is very suitable for the parking brake system of new energy vehicles.

[0037] Further, as shown in Figures 1 to 9As shown, the upper and lower ends of the rotor 6 are sleeved with bearings 3, both bearings 3 are arranged at the connection with the shell 1, and the rotor 6 is installed on the shell 1 through the bearings 3, the bearings 3 are made of wear-resistant material, and the bearings 3 and the rotor 6 have a gap fit, the upper and lower baffle plates 18 and 19 are fixedly connected with a plurality of clamping blocks 21 on one side end face, the upper and lower baffle plates 18 and 19 are clamped and connected with the shell 1 through the clamping blocks 21, a plurality of open grooves 14 are uniformly and spaced apart provided at the outer corners of the winding block 20, the size of the open groove 14 corresponds to the size of the winding 5, the outer wall of the shell 1 is fixedly connected with a wiring port 4 on the upper end of both sides, the ends of the winding 5 are connected with the wiring port 4 respectively, an insulation protection layer is arranged at the connection of the wiring port 4 and the winding 5, a shielding layer is arranged outside the winding 5, the shielding layer is used to reduce electromagnetic interference, the layout of the winding 5 on the winding block 20 adopts a distributed design, that is, the adjacent windings 5 are staggered by a certain angle in the circumferential direction, the upper of the rotor 6 is provided with a lubricating oil groove 22, the lubricating oil groove 22 is communicated with the position of the bearing 3, and is used to provide lubrication for the bearing 3 during the operation of the motor, reduce friction and wear, and a sealing ring is arranged at the connection of the shell 1 and the shell cover 2, the sealing ring is made of elastic material, and is used to prevent dust, moisture and other external impurities from entering the inside of the motor;

[0038] The rotor 6 is the core rotating component in this structure, mounted on the housing 1 through bearings 3 made of wear-resistant materials, ensuring stability and durability during rotation. In brushless motors, it is supported inside the stator through bearings 3, and the gap between the bearings 3 and the rotor 6 reduces friction and wear, improving the motor's operating efficiency. This gap is also important in brushless motors, as it ensures smooth rotation of the rotor 6 inside the stator. The upper and lower partitions 18 and 19 are connected to the housing 1 through multiple clamping blocks 21, serving as a fixed and supporting structure for internal components. In brushless motors, similar fixing structures are used to maintain the relative positions of the stator and rotor 6. The open slot 14 on the winding block 20 is used to accommodate and fix the winding 5, which is a key component in brushless motors, responsible for generating a magnetic field to drive the rotor 6 to rotate. In this paragraph, the winding 5 layout adopts a distributed design, with adjacent windings 5 staggered at a certain angle in the circumferential direction. This design helps optimize the distribution of the electromagnetic field and improve the performance of the motor. The wiring port 4 is used to connect external power sources and windings 5, providing the required electrical energy for the motor. In brushless motors, the wiring port 4 is also used to connect the controller and the motor, enabling the transmission and control of electrical energy. The insulation protection layer and the shielding layer are set to improve the safety and electromagnetic compatibility of the motor. The insulation protection layer prevents current leakage and short circuits, while the shielding layer reduces electromagnetic interference and ensures stable operation of the motor. Finally, the lubricating oil groove 22 is connected to the position of the bearing 3 to provide lubrication for the bearing 3, reducing friction and wear, and prolonging the service life of the motor. In brushless motors, although the need for lubrication may not be as significant as in traditional motors, proper lubrication and maintenance are still important to ensure long-term stable operation of the motor.

[0039] During the operation of the motor, when the power is turned on, the current passes through the winding 5 to generate a magnetic field, which interacts with the permanent magnets 11 in the rotor 6, generating torque to drive the rotor 6 to rotate. The rotation of the rotor 6 is transmitted to the drive shaft through the gear box, achieving the locking or opening action. At the same time, the motor utilizes its own cogging torque characteristics to provide a certain locking force in the unpowered state. This is because when the motor rotor 6 rotates to a certain position, the magnetic permeability change between the permanent magnets 11 and the stator teeth causes the magnetic field energy storage to change, resulting in cogging torque that attempts to position the rotor 6 at that location. Through the special design of the slot 13 size and the flat-top wave magnetization method of the rotor 6, the motor can achieve smooth and large cogging torque to meet the locking function requirements.

[0040] Furthermore, the performance and structure of the motor are optimized. The traditional interference fit of the ball bearing 3 is replaced with a sliding fit using a gear and shaft sleeve structure, reducing the stress on the bearing 3 inner ring, reducing noise, and increasing its service life. During the process, the common end structure is designed reasonably, optimizing the winding process and welding method, improving production efficiency and product consistency.

[0041] Further, as shown in Figure 8 The lower end of the shell 1 is fixedly connected with a mounting ring 15, the outer wall of the mounting ring 15 is uniformly and fixedly connected with a plurality of connecting pieces 16, both ends of the connecting piece 16 are fixedly connected with a buffer piece 17, the buffer piece 17 is arranged obliquely, and the buffer piece 17 is made of elastic material;

[0042] The mounting ring 15, the connecting piece 16 and the buffer piece 17 constitute a damping assembly in the brushless motor, when the motor is running, especially under the working conditions of starting, accelerating or braking of the new energy vehicle, the motor will be subjected to a large impact force or vibration, at this time, the damping assembly plays a key role, the impact force or vibration is first transmitted to the mounting ring 15, and then dispersed to each buffer piece 17 through the connecting piece 16, since the buffer piece 17 is designed to be inclined and made of elastic material, it can effectively absorb and disperse the impact force or vibration energy, convert it into heat energy or other forms of energy dissipation, thereby reducing the damage to the motor itself and the surrounding structure.

[0043] Those skilled in the art should understand that the discussion of the above any embodiment is only exemplary, and is not intended to imply that the scope (including claims) of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0044] The present application is intended to cover all such alternatives, modifications and variations as fall within the broad scope of the appended claims. Accordingly, any and all such modifications, variations or equivalents that fall within the spirit and scope of the application are intended to be included within the scope of the application.

Claims

1. A brushless motor for locking and driving a transmission system of a new energy vehicle, comprising a shell (1) and a shell cover (2), the shell (1) is clamped on the upper end of the shell cover (2), characterized in that: The inner middle part of the shell (1) is rotationally connected with a rotor (6), the rotor (6) adopts a flat top wave magnetization mode, the outer wall of the rotor (6) is fixedly connected with a permanent magnet (11) in the inside of the shell (1), the outer wall of the permanent magnet (11) is fixedly connected with pig iron (12), the inside of the shell cover (2) is provided with an upper baffle (18) and a lower baffle (19) at the upper end and the lower end respectively, the side end face of the upper baffle (18) close to the lower baffle (19) is fixedly connected with an upper partition sleeve (9), the side end face of the lower baffle (19) close to the upper baffle (18) is fixedly connected with a lower partition sleeve (10), the outer part of the upper partition sleeve (9) and the lower partition sleeve (10) is sleeved with a plurality of iron cores (8), the side end face of the upper partition sleeve (9) and the lower partition sleeve (10) away from the iron core (8) is fixedly connected with a winding block (20), the side of the plurality of winding blocks (20) close to the rotor (6) is fixedly connected with a connecting plate (7), the connecting plate (7) is designed in an arc shape, the outer part of the winding block (20) is wound with a winding (5), the connecting plate (7) is distributed at equal angles in the inside of the shell (1) and there is a notch (13) between each connecting plate (7), the notch (13) adopts a trapezoidal or arc shape.

2. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The upper end and the lower end of the rotor (6) are sleeved with a bearing (3), the two bearings (3) are arranged at the connection with the shell (1), and the rotor (6) is installed on the shell (1) through the bearing (3), the bearing (3) is made of wear-resistant material, and the bearing (3) and the rotor (6) are gap-fitted.

3. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The side end face of the upper baffle (18) and the lower baffle (19) is fixedly connected with a plurality of clamping blocks (21), and the upper baffle (18) and the lower baffle (19) are clamped and connected with the shell (1) through the plurality of clamping blocks (21).

4. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The outer corners of the winding block (20) are uniformly and interval provided with a plurality of open grooves (14), and the size of the open groove (14) corresponds to the size of the winding (5).

5. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The outer wall of the upper end of the shell (1) is fixedly connected with a wiring port (4), the ends of the winding (5) are connected with the wiring port (4) respectively, and an insulation protection layer is arranged at the connection between the wiring port (4) and the winding (5).

6. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: A shielding layer is arranged outside the winding (5), and the shielding layer is used for reducing electromagnetic interference.

7. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The lower end of the shell (1) is fixedly connected with a mounting ring (15), the outer wall of the mounting ring (15) is uniformly and interval fixedly connected with a plurality of connecting plates (16), the two ends of the connecting plate (16) are fixedly connected with a buffer plate (17), the buffer plate (17) is designed in an inclined manner, and the buffer plate (17) is made of elastic material.

8. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The layout of the winding (5) on the winding block (20) adopts a distributed design, that is, the adjacent windings (5) are staggered by a certain angle in the circumferential direction.

9. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The upper part of the rotor (6) is provided with a lubricating oil groove (22), the lubricating oil groove (22) is communicated with the position of the bearing (3), and is used for providing lubrication for the bearing (3) during the operation of the motor, reducing friction and wear.

10. The brushless motor for locking driving of a new energy vehicle transmission system according to claim 1, characterized in that: The connecting part of the shell (1) and the shell cover (2) is provided with a sealing ring, which is made of elastic material and used for preventing dust, moisture and other impurities from entering the motor.

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