Protective assembly, electric machine and vehicle
By designing protective components in the motor, and using abutment and rotating parts to limit rotor deformation, the friction problem caused by stator-rotor contact is solved, ensuring motor efficiency and preventing damage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-08-11
- Publication Date
- 2026-08-04
AI Technical Summary
When the wheel is subjected to force due to impacts, the stator and rotor in the motor may become misaligned, leading to increased friction, reduced efficiency, and potential damage to the laminated iron core and magnets.
Design a protective component including an abutment and a rotating component. By limiting the deformation of the rotor when it is under force, it avoids contact with the stator. It uses annular raceways and rolling elements to reduce friction. The fixing component ensures stable connection of the component, and the friction component increases friction to form an overall load-bearing structure.
This effectively prevents the rotor from contacting the stator, maintains motor efficiency, prevents damage, and ensures normal motor operation.
Smart Images
Figure CN224596312U_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of motor technology, and more specifically, to a protection component, and a motor and vehicle using the protection component. Background Technology
[0002] When a vehicle is in motion, due to road surface factors or other external factors, the wheels may be subjected to force due to impacts. The force on the wheels will be transmitted to the motor inside the wheel through the drive shaft. If the stator and rotor in the motor are misaligned and come into contact due to the force transmitted from the wheel to the motor, it will increase the friction between the stator and rotor, reduce the efficiency of the motor, and prolonged contact will also damage the stacked iron core and magnets in the stator and rotor, leading to motor failure. Utility Model Content
[0003] The purpose of this disclosure is to provide a protection component that can effectively prevent the rotor from contacting the stator when the rotor is under stress in the motor, thereby affecting the efficiency of the motor and preventing damage to the motor.
[0004] A first aspect of this disclosure provides a protection component for connection to a motor, comprising:
[0005] Abutting member and a rotating member, the abutting member and the rotating member being used to connect with the end face of one of the stator or the rotor;
[0006] The protection component includes a following state and a protection state. In the following state, the abutment is stationary relative to the rotating component. When the rotor is deformed by load, the protection component is in the protection state. The abutment is used to abut against the end face of the other of the stator or rotor to limit the deformation of the stator or rotor, and the abutment rotates relative to the rotating component.
[0007] Optionally, the abutment and the rotating member are annular and at least partially overlap radially. The abutment has an L-shaped cross-section and includes a first ring extending radially along the stator and a second ring extending axially along the stator. The second ring is used to abut against the stator or rotor, and when the protection assembly is in the following state, the end face of the second ring is configured to be spaced apart from the end face of the stator or rotor.
[0008] Optionally, two rotating components are provided, located on both sides of the first ring body along its axial direction. The rotating components at least partially overlap with the first ring body in the radial direction, and an annular raceway is provided in the overlapping portion of the rotating components and the first ring body. Multiple rolling elements are provided in the annular raceway, and the multiple rolling elements are spaced apart circumferentially along the annular raceway.
[0009] Optionally, the end face of the second ring is configured to be spaced 0.1-0.3 mm from the end face of the stator or rotor.
[0010] Optionally, it also includes a fixing member for fixing and abutting the abutting member and the rotating member against the stator or rotor.
[0011] Optionally, the abutting member, rotating member, and fixing member are annular. The fixing member includes a third ring body, a fourth ring body, and a fifth ring body. The third ring body extends radially along the stator for fixing to the stator or rotor. The fourth ring body extends axially along the stator, with a first end fixed to the third ring body and the other end provided with the fifth ring body. The fifth ring body extends radially inward along the stator so that a mounting cavity for placing the abutting member and rotating member is formed between the end face of the stator or rotor, the end face of the fourth ring body, and the end face of the fifth ring body.
[0012] Optionally, the third ring body and the stator or rotor are provided with a plurality of connecting holes in the circumference, the connecting holes being used to cooperate with connecting parts to fix the third ring body to the stator or rotor.
[0013] Optionally, it also includes a friction element for connecting to the end face of a stator or rotor that is not provided with the protective assembly, the friction element contacting the abutment to increase the frictional force between the abutment and the friction element.
[0014] Optionally, the friction element and the abutment element are annular, and the end face of the abutment element used to abut against the friction element is chamfered.
[0015] A second aspect of this disclosure also provides an electric motor, including a stator, a rotor, and a protection component as described in the above embodiments, wherein the protection component is fixedly connected to the stator or the rotor.
[0016] Optionally, the protection component is connected to the rotor, and the abutment is positioned towards the stator. When in the following state, the protection component rotates with the rotor. When the rotor is deformed by load, the protection component is in a protective state, and the end face of the abutment abuts against the end face of the stator and remains stationary to limit the rotor deformation. The rotating component rotates with the rotor relative to the abutment.
[0017] A third aspect of this disclosure also provides a vehicle including the motor described in the above embodiments.
[0018] The advantages of this disclosure through the above technical solution are as follows: After the protection component of this disclosure is installed on the motor, when the rotor in the motor undergoes load deformation due to external environmental factors, it can contact the stator or rotor without the protection component after only a slight deformation of the rotor, so that the stator, the contacting part and the rotor form a whole, and the three of them jointly bear the load, preventing the rotor from continuing to move towards the stator and continue to deform. In this way, it can ensure that the rotor will not contact the stator after being subjected to force, affecting the working efficiency of the motor, and causing damage to the stacked iron core and magnets in the motor.
[0019] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description
[0020] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:
[0021] Figure 1 This is an exploded view of the motor provided in an exemplary embodiment of this disclosure;
[0022] Figure 2 This is an exploded view of the motor provided in an exemplary embodiment of this disclosure from another angle;
[0023] Figure 3 This is a cross-sectional view of the motor provided in an exemplary embodiment of this disclosure;
[0024] Figure 4 This is an exploded view of the protection component provided in the exemplary embodiments of this disclosure;
[0025] Figure 5 This is a cross-sectional view of the protection component provided in an exemplary embodiment of this disclosure.
[0026] Explanation of reference numerals in the attached figures
[0027] 1-Stator; 2-Rotor; 3-Protective assembly; 31-Abutting part; 311-First ring body; 312-Second ring body; 32-Rotating part; 33-Annular raceway; 34-Rolling element; 35-Fixed part; 351-Third ring body; 352-Fourth ring body; 353-Fifth ring body; 354-Mounting cavity; 355-Connecting hole; 356-Connecting part; 4-Friction element; 5-Bearing. Detailed Implementation
[0028] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.
[0029] In this disclosure, unless otherwise stated, directional terms such as "up," "down," "high," "low," "top," and "bottom" generally refer to the orientation of the corresponding component or structure in the direction of gravity. For specific details, please refer to [reference needed]. Figure 1 The drawing orientation is shown. "Inner" and "outer" refer to the inner and outer contours of the corresponding components. Furthermore, it should be noted that terms such as "first" and "second" are used to distinguish one element from another and do not indicate sequence or importance. Additionally, in the description with reference to the accompanying drawings, the same reference numerals in different drawings denote the same elements. The above definitions are for explanation and illustration only and should not be construed as limiting this disclosure.
[0030] This disclosure relates to a protection component for connection to a motor, capable of preventing the stator 1 and rotor 2 from coming into contact with each other after the motor is subjected to force, thus avoiding impact on the motor's operating efficiency or damage to the motor. See [link to relevant documentation]. Figure 1 and 4 The protection component 3 disclosed herein includes an abutment member 31 and a rotating member 32. The abutment member 31 and the rotating member 32 can be connected to the end face of the stator 1 or the rotor 2 in the motor, and the specific connection can be determined according to the specific structure of the motor or other factors. After the protection component 3 is connected to the motor, the protection component 3 has a following state and a protection state. In the following state, a certain preload can be applied between the abutment member 31 and the rotating member 32 and the stator 1 or the rotor 2, so that the abutment member 31 and the rotating member 32 can remain relatively stationary. When the protection component 3 is connected to the stator 1, the abutment member 31 and the rotating member 32 remain stationary. When the protection component 3 is connected to the rotor 2, the abutment member 31 and the rotating member 32 rotate synchronously with the rotor 2.
[0031] When the rotor 2 is subjected to load deformation, the abutment 31 will only undergo slight deformation before contacting the stator 1 or rotor 2 without the protection component 3 connected. This slight deformation does not affect the operation of the motor, allowing the stator 1, abutment 31, and rotor 2 to form a whole, with all three sharing the load to limit further deformation of the rotor 2. After the abutment 31 contacts the stator 1 or rotor 2, in order to keep the rotor 2 able to continue rotating relative to the stator 1, when the protection component 3 is connected to the stator 1, the rotating component 32 will remain stationary, and the rotor 2 will drive the abutment 31 to rotate relative to the stator 1 and the rotating component 32. When the protection component 3 is connected to the rotor 2, the abutment 31 will remain stationary and contact the stator 1, and the rotor 2 will drive the rotating component 32 to rotate relative to the stator 1 and the abutment 31, thus ensuring normal operation of the motor while limiting further deformation of the rotor 2.
[0032] After the protection component 3 of this disclosure is installed on the motor, when the rotor 2 in the motor undergoes load deformation due to external environmental factors, it can contact the stator 1 or rotor 2 without the protection component 3 after only a slight deformation of the rotor 2. This allows the stator 1, the contact member 31, and the rotor 2 to form a whole, with all three sharing the load. This prevents the rotor 2 from continuing to move towards the stator 1 and deform. In this way, it can ensure that the rotor 2 will not contact the stator 1 after being subjected to force, thus affecting the working efficiency of the motor and causing damage to the stacked iron core and magnets in the motor.
[0033] In one embodiment of this disclosure, see Figure 2 , Figure 4 and Figure 5 The abutment 31 and the rotating member 32 are annular, and the abutment 31 and the rotating member 32 at least partially overlap in the radial direction so that the abutment 31 can move relative to the rotating member 32. The cross-section of the abutment 31 can be L-shaped, including a first ring body 311 extending radially along the stator 1 and a second ring body 312 extending axially along the stator. The radially extending first ring body 311 can at least partially overlap with the rotating member 32 in the radial direction so that the abutment 31 can move relative to the rotating member 32 through the first ring body 311. When the protection component 3 is in the following state, the axially extending second ring body 312 is spaced apart from the stator 1 or the rotor 2. When the protection component 3 is in the protection state, it can abut against the stator 1 or the rotor 2. The axial extension distance of the second ring body 312 can be determined according to the actual length, that is, the interval distance with the stator 1 or the rotor 2, so as to ensure that the second ring body 312 can abut against the stator 1 or the rotor 2 when only a small deformation of the rotor 2 occurs and the operation of the motor is not affected.
[0034] In one embodiment of this disclosure, the end face of the second ring 312 is spaced 0.1-0.3 mm from the end face of the stator 1 or the rotor 2. This arrangement ensures that after the rotor 2 has undergone a slight deformation under a certain load, it can abut against the second ring 312, so that the stator 1, the second ring 312, and the rotor 2 can form a whole to jointly resist the load, and the rotor 2 will not continue to deform, causing the stator 1 to come into contact with the rotor 2.
[0035] In one embodiment of this disclosure, see Figure 1 , Figure 3 and Figure 4Two rotating members 32 are provided, located on both sides of the first ring body 311. The rotating members 32 and the first ring body 311 overlap radially at least partially. On the overlapping portion of the rotating members 32 and the first ring body 311, annular raceways 33 are provided on their opposite sides. Multiple rolling elements 34 are provided in the annular raceways 33. The rolling elements 34 can be balls, cylindrical structures, etc. When the rotating members 32 and the first ring body 311 rotate relative to each other, the annular raceways 33 and the rolling elements 34 can reduce the friction between them, so that the rotor 2 can rotate normally relative to the stator 1 when there is a preload. The contact between the annular raceways 33 and the rolling elements 34 can also preferentially bear the axial load borne by the rotor 2 to better resist the deformation of the rotor 2. They can also bear the radial load together with the first ring body, further ensuring the stability of the rotor 2. Of course, in other embodiments, the abutment member 31 and the rotating member 32 may also have other structures, which can be determined according to the actual situation, and this disclosure does not limit them.
[0036] In one embodiment of this disclosure, see Figure 1 , Figure 3 and Figure 4 The protective component 3 also includes a fixing member 35, which connects the abutment member 31 and the rotating member 32 to the stator 1 or the rotor 2, and presses the abutment member 31 and the rotating member 32 against the stator 1 or the rotor 2. This ensures that the abutment member 31 and the rotating member 32 remain relatively stationary when the protective component 3 is in the following state. The abutment member 31 and the rotating member 32 can be pressed against the stator 1 or the rotor 2 by applying a preload force. Of course, in other embodiments, the abutment member 31 and the rotating member 32 can also be fixedly connected to the stator 1 or the rotor 2 by other structures, depending on the actual situation. This disclosure does not limit this.
[0037] In one embodiment of this disclosure, see Figure 3 , Figure 4 and Figure 5 The abutment 31, the rotating part 32, and the fixing part 35 are annular. The fixing part 35 includes a third ring body 351, a fourth ring body 352, and a fifth ring body 353. The third ring body 351 extends radially along the stator 1 and can be fixed with the stator 1 or the rotor 2. The fourth ring body 352 extends axially along the stator 1. The first end is fixed with the inner ring of the third ring body 351, and the other end is provided with the fifth ring body 353. The fifth ring body 353 extends radially inward along the stator 1 so that a mounting cavity 354 for placing the abutment 31 and the rotating part 32 can be formed between the end face of the stator 1 or the rotor 2, the end face of the fourth ring body 352, and the end face of the fifth ring body 353.
[0038] During installation, the abutment 31 and the rotating member 32 can be placed into the mounting cavity 354. Then, the third ring body 351 is connected to the stator 1 or the rotor 2, so that one of the rotating member 32 or the abutment 31 abuts against the end face of the stator 1 or the rotor 2, and the other abuts against the end face of the fifth ring body 353. This completes the installation of the abutment 31 and the rotating member 32 with the stator 1 or the rotor 2. Furthermore, by adjusting the distance between the third ring body 351 and the stator 1 or the rotor 2, the preload applied to the abutment 31 and the rotating member 32 by the fixing member 35 can be changed, ensuring that the abutment 31 and the rotating member 32 will not move relative to each other when the protective component 3 is in the following state, and that the rotor 2 will not be hindered from rotating relative to the stator 1 when the protective component 3 is in the protected state. Of course, in other embodiments, the fixing member 35 can also be of other structures, depending on the actual situation, and this disclosure does not limit it.
[0039] In one embodiment of this disclosure, see Figure 3 , Figure 4 and Figure 5 Multiple connecting holes 355 are provided circumferentially on the third ring body 351, stator 1, or rotor 2. These connecting holes 355 can mate with connecting members 356 to fix the third ring body 351 to the stator 1 or rotor 2. For example, the connecting holes 355 can be threaded holes, and the connecting members 356 can be bolts. During connection, the third ring body 351 can be aligned with the multiple threaded holes on the stator 1 or rotor 2, and then the fixed connection between the two can be completed by screwing bolts into each pair of threaded holes. Furthermore, the preload applied by the fixing member 35 to the abutment member 31 and the rotating member 32 can be changed by adjusting the connection length of the bolts. Of course, in other embodiments, the connection method between the third ring body 351 and the stator 1 or rotor 2 can also be other connection methods known to those skilled in the art, which will not be elaborated further here.
[0040] In one embodiment of this disclosure, see Figure 3 , Figure 4 and Figure 5 The protective component 3 also includes a friction element 4, which is disposed on the stator 1 or rotor 2 without the protective component 3. The friction element 4 can be connected to the end face of the stator 1 or rotor 2, and the connection method can be adhesive bonding, bolting, or other connection methods known to those skilled in the art, which will not be elaborated further here. By providing the friction element 4, the abutment 31 can abut against the friction element 4 on the stator 1 or rotor 2 when it abuts against the stator 1 or rotor 2, thereby increasing the frictional force between the abutment 31 and the stator 1 or rotor 2. The abutment 31 will not rotate relative to the stator 1 and rotor 2, so that the three can form a stable whole, jointly resisting the load on the rotor 2, preventing the rotor 2 from continuing to deform and come into contact with the stator 1, thus affecting the motor's working efficiency and causing damage to the motor.
[0041] In one embodiment of this disclosure, see Figure 3 , Figure 4 and Figure 5 The friction element 4 and the abutment element 31 are annular, and the end face of the abutment element 31 that abuts against the friction element 4 is chamfered. By providing a chamfer on the end face of the abutment element 31, the contact area between the end face of the abutment element 31 and the friction element 4 can be increased, further increasing the friction between the abutment element 31 and the friction element 4, so as to ensure that the abutment element 31 will not rotate relative to the stator 1 and the rotor 2, and improve the stability of the abutment between the abutment element 31 and the stator 1 or the rotor 2.
[0042] A second aspect of this disclosure also relates to an electric motor, including a stator 1, a rotor 2, and a protection component 3 as described in the above embodiments. The protection component 3 is connected to the stator 1 or the rotor 2 of the motor. The stator 1 and the rotor 2 can be connected by a bearing 5, so that the rotor 2 can rotate relative to the stator 1 through the bearing 5. By setting the protection component 3, when the rotor 2 or the bearing 5 is deformed under external load, it can contact the stator 1 or the rotor 2 without the protection component 3 after only a small deformation, so that the stator 1, the abutment 31, and the rotor 2 form a whole, and the three share the load, preventing the rotor 2 from continuing to move towards the stator 1 and continue to deform. This ensures that the rotor 2 will not contact the stator 1 after being subjected to force, thus affecting the working efficiency of the motor and causing damage to the stacked iron core and magnets in the motor.
[0043] In one embodiment of this disclosure, see Figure 1 , Figure 2 and Figure 3 Taking the protection component 3 connected to the rotor 2 as an example, the abutment 31 in the protection component 3 is set towards the stator 1. During installation, the abutment 31 and the rotating component 32 can be connected to the end face of the rotor 2 by the fixing component 35. When the rotor 2 is subjected to force or the bearing 5 is subjected to force transmitted to the rotor 2 and the rotor 2 moves slightly, the abutment 31 on the rotor 2 will abut against the friction component 4 on the stator 1 to limit the rotor 2 from continuing to move towards the stator 1. At this time, the abutment 31 and the stator 1 remain relatively stationary. The rotor 2 will drive the rotating component 32 to rotate relative to the stator 1 and the abutment 31, so that the stator 1, the rotor 2 and the abutment 31 form a whole to jointly resist the load borne by the rotor 2, ensuring that the rotor 2 will not contact the stator 1, affecting the operation of the motor and causing motor failure.
[0044] A third aspect of this disclosure also relates to a vehicle including the motor described in the above embodiments. By using the motor of this disclosure, when the wheels of the vehicle are subjected to force due to external environmental factors and the force is transmitted to the rotor 2 or bearing 5 in the motor through the connecting shaft, the protection component 3 in the motor can effectively prevent the rotor 2 from contacting the stator 1 under force, thereby affecting the working efficiency of the motor and preventing damage to the motor, which in turn affects the driving of the vehicle.
[0045] The preferred embodiments of this disclosure have been described in detail above with reference to the accompanying drawings. However, this disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.
[0046] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.
[0047] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.
Claims
1. A protection assembly for connection to an electric machine, characterized in that, include: Abutting member and a rotating member, the abutting member and the rotating member being used to connect with the end face of one of the stator or the rotor; The protection component includes a following state and a protection state. In the following state, the abutment is stationary relative to the rotating component. When the rotor is deformed by load, the protection component is in the protection state. The abutment is used to abut against the end face of the other of the stator or rotor to limit the deformation of the stator or rotor, and the abutment rotates relative to the rotating component.
2. The protective assembly of claim 1, wherein, The abutment and the rotating member are annular and at least partially overlap radially. The abutment has an L-shaped cross-section and includes a first ring extending radially along the stator and a second ring extending axially along the stator. The second ring is used to abut against the stator or rotor, and when the protection assembly is in the following state, the end face of the second ring is configured to be spaced apart from the end face of the stator or rotor.
3. The protective assembly of claim 2, wherein, Two rotating components are provided, located on both sides of the first ring body along its axial direction. The rotating components at least partially overlap with the first ring body in the radial direction, and an annular raceway is provided in the overlapping portion of the rotating components and the first ring body. Multiple rolling elements are provided in the annular raceway, and the multiple rolling elements are spaced apart circumferentially along the annular raceway.
4. The protective assembly of claim 2, wherein, The end face of the second ring is configured to be spaced 0.1-0.3 mm from the end face of the stator or rotor.
5. The protective assembly of claim 1, wherein, It also includes a fixing member for fixing and abutting the abutting member and the rotating member against the stator or rotor.
6. The protective assembly of claim 5, wherein, The abutment, rotating member, and fixing member are annular. The fixing member includes a third ring, a fourth ring, and a fifth ring. The third ring extends radially along the stator and is used to fix it to the stator or rotor. The fourth ring extends axially along the stator, with its first end fixed to the third ring and the other end provided with the fifth ring. The fifth ring extends radially inward along the stator so that a mounting cavity for placing the abutment and rotating member is formed between the end face of the stator or rotor, the end face of the fourth ring, and the end face of the fifth ring.
7. The protective assembly of claim 6, wherein, The third ring body and the stator or rotor are provided with a plurality of connecting holes in their circumference. The connecting holes are used to cooperate with connecting parts to fix the third ring body to the stator or rotor.
8. The protective assembly of claim 1, wherein, It also includes a friction element for connecting to the end face of a stator or rotor that is not equipped with the protective assembly. The friction element contacts the abutment to increase the friction between the abutment and the friction element.
9. The protective assembly of claim 8, wherein, The friction element and the abutment element are annular, and the end face of the abutment element used to abut against the friction element is chamfered.
10. An electric machine characterized by include: The stator, the rotor, and the protection component according to any one of claims 1-9, wherein the protection component is fixedly connected to the stator or the rotor.
11. The electric machine of claim 10, wherein, The protection component is connected to the rotor, and the abutment is positioned towards the stator. When in the following state, the protection component rotates with the rotor. When the rotor is deformed by load, the protection component is in the protection state. The end face of the abutment abuts against the end face of the stator and remains stationary to limit the rotor deformation. The rotating component rotates with the rotor relative to the abutment.
12. A vehicle characterized by comprising: include: The motor according to any one of claims 10-11.