End plate structure and rotor assembly

Abstract

The utility model provides a kind of end plate structure and rotor assembly, it is related to motor technical field.End plate structure includes end plate and elastic sheet.End plate is provided with multiple through holes, multiple through holes are annularly distributed around the center of end plate, at least two elastic sheets of opposite or back-to-back setting are provided at each through hole.Multiple through holes and multiple magnetic steel holes set on rotor core are one-to-one corresponding arrangement, therefore, at least two elastic sheets set on the same through hole can effectively play buffering effect to the magnetic steel set in corresponding magnetic steel hole, and at least two elastic sheets of opposite or back-to-back setting not only can increase the contact area of elastic sheet and magnetic steel, to improve buffering effect, but also can make the stress of magnetic steel relatively balanced, ensure that magnetic steel is smoothly in place under the buffering effect of elastic sheet.Visible, the end plate structure provided in the utility model embodiment effectively avoids the problem that magnetic steel and end plate directly collide and appear breakage and jam etc during assembly, significantly improves assembly quality.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to an end plate structure and rotor assembly. Background Technology

[0002] Existing motor rotor assemblies typically consist of end plates, rotor cores, rivets, and magnets. During assembly, the magnets need to be placed into the magnet holes in the rotor core and allowed to slide down to the end plates under their own weight. However, due to the lack of a buffer structure in the end plates, the magnets collide with the end plates, potentially causing mechanical damage such as breakage or chipping of the magnets. This can also lead to magnet detachment, blocking pipelines or jamming the pump body, severely impacting the safe operation and service life of the equipment. Utility Model Content

[0003] The purpose of this utility model is to provide an end plate structure and rotor assembly. Its structure is reasonably designed and can effectively buffer the magnets, avoiding damage and blockage caused by direct collision between the magnets and the end plate during assembly.

[0004] The embodiments of this utility model are implemented as follows:

[0005] In a first aspect, this utility model provides an end plate structure, the end plate structure including an end plate and a spring sheet;

[0006] The end plate is provided with a plurality of through holes, which are arranged in a ring around the center of the end plate. The plurality of through holes are used to correspond one-to-one with a plurality of magnet holes in the rotor core. At least two spring pieces are provided at each of the through holes, which are arranged opposite or back to back.

[0007] In the above embodiments, the multiple through holes are arranged one-to-one with the multiple magnet holes provided on the rotor core. Therefore, at least two springs arranged on the same through hole can effectively buffer the magnets arranged in the corresponding magnet holes. The arrangement of at least two opposite or back-to-back springs can not only increase the contact area between the springs and the magnets to improve the buffering effect, but also make the magnets relatively balanced under the force, ensuring that the magnets are smoothly positioned under the buffering effect of the springs.

[0008] In an optional embodiment, the spring sheet includes a connecting portion and an abutting portion connected together. The connecting portion is inclined relative to the end plate. The connecting portions of two adjacent spring sheets are respectively connected to the sidewalls at both ends forming the through hole. The abutting portions of two adjacent spring sheets are arranged opposite to each other.

[0009] In the above embodiment, the abutting parts of two adjacent spring plates work together to buffer the magnet, which can effectively buffer the magnet and make the magnet relatively balanced in force, avoiding the magnet from colliding with the end plate and breaking during assembly, thereby improving the assembly quality and thus improving the operating stability and service life of the rotor assembly.

[0010] In an optional embodiment, the spring sheet includes a connecting part and an abutting part connected together. The connecting part is inclined relative to the end plate. The end plate has a mounting part in the middle of the through hole. The connecting parts of two adjacent spring sheets are respectively connected to the mounting part, and the abutting parts of two adjacent spring sheets are arranged opposite to each other.

[0011] In the above embodiments, similarly, the abutting portions of two adjacent spring plates work together to buffer the magnet, which can effectively buffer the magnet and make the magnet relatively balanced in terms of force, avoiding the magnet from colliding with the end plate and breaking during assembly, thereby improving the assembly quality and thus improving the operational stability and service life of the rotor assembly.

[0012] In an optional embodiment, the abutting portion, the connecting portion, and the end plate are manufactured using an integrated stamping process.

[0013] In the above embodiments, the manufacturing process is simple and low-cost, and can be adapted to existing production lines without the need to modify riveting equipment, thus exhibiting good economic efficiency and compatibility.

[0014] In an optional embodiment, the abutting portion is parallel to the end plate, and the abutting portions of at least two of the spring pieces located in the same through hole are used together to contact the magnet.

[0015] In the above embodiment, the contact portion of at least two spring pieces together forms a plane that contacts the magnet, which not only increases the contact area between the contact portion and the magnet, but also enhances the buffering force on the magnet, thereby effectively preventing the magnet from colliding with the end plate and being damaged.

[0016] In an optional embodiment, the abutting part is used to abut against the magnet, the length of the connecting part is L1, and the width of the magnet is L2, then satisfying: 2 < L2 / L1 < 4.

[0017] In the above embodiments, the width of the magnet and the width of the connecting part are limited to a range of 2 to 4 mm. This ensures a reasonable structure, guaranteeing stable contact between the magnet and the abutment during installation, while preventing structural failure due to excessive stress on the connecting part caused by an excessively short connecting part, which could lead to magnet installation angle deviation or other issues. This ratio range helps to achieve a balance between the reliability of magnet installation and the load-bearing capacity of the connecting part, thereby improving the overall structural stability and assembly accuracy of the end plate.

[0018] In an optional embodiment, the top and bottom walls of the abutment portion are parallel to the end plate, the thickness of the end plate is H1, and the distance between the bottom wall of the abutment portion and the bottom wall of the end plate is H2, then the following condition is satisfied: 0 < H2 / H1 < 0.8.

[0019] In the above embodiments, the ratio of the distance between the bottom wall of the abutment portion and the bottom wall of the end plate to the thickness of the end plate is limited to 0~0.8 to ensure a reasonable structural design of the abutment portion. This design allows the abutment portion to more evenly transmit force to the end plate body when subjected to the abutment force from the magnet, avoiding localized stress concentration caused by the abutment portion being too high or too low. Furthermore, this arrangement helps maintain the parallel contact between the end plate and the magnet, preventing tilting or sliding due to assembly deviations, thereby improving the fit accuracy and safety of the structure.

[0020] In an optional embodiment, the width of the spring is W1 and the thickness of the magnet is L3, then the following condition is satisfied: 0.2 < W1 / L3 < 1.

[0021] In the above embodiments, by limiting the ratio of the width of the spring piece 120 to the thickness of the magnet 300 to 0.2~1, the spring piece has sufficient width to provide stable elastic support force, while avoiding interference with adjacent structures due to excessive spring piece width. Furthermore, it improves the uniformity of the spring piece under pressure deformation, giving it good fit and resilience when in contact with the magnet or other components, thereby enhancing the adaptability and service life of the entire end plate structure under dynamic working conditions.

[0022] In an optional embodiment, two adjacent through holes extend at an angle to each other on the plane of the end plate and are arranged in a group, and multiple groups of through holes are arranged rotationally symmetrically about the center of the end plate.

[0023] In the above embodiments, the multiple sets of through holes are arranged in a rotationally symmetrical manner about the center of the end plate. That is, after the end plate is rotated around the center by a certain angle, the structure of the rotated end plate is completely identical to that of the end plate before rotation. Therefore, by setting the multiple sets of through holes to be rotationally symmetrical about the center of the end plate, the entire end plate can maintain good symmetry and balance when subjected to force.

[0024] Secondly, this utility model provides a rotor assembly, including a rotor core, magnets, balance blocks, fixing members, and end plate structures as described in any of the foregoing embodiments. The rotor core is provided with magnet holes, and the magnets are disposed in the magnet holes. Two end plate structures are respectively disposed at both ends of the rotor core, and two balance blocks are respectively disposed on the two end plate structures. The fixing members pass through the rotor core and the end plate structures and balance blocks located on both sides of the rotor core.

[0025] The beneficial effects of the end plate structure and rotor assembly provided in this embodiment of the invention include: multiple through holes are corresponding one-to-one with multiple magnet holes on the rotor core. Therefore, at least two spring clips disposed on the same through hole can effectively buffer the magnets disposed in the corresponding magnet holes. Furthermore, the placement of at least two opposing or back-to-back spring clips not only increases the contact area between the spring clips and the magnets, thereby improving the buffering effect, but also ensures that the magnets are subjected to relatively balanced forces, guaranteeing that the magnets are smoothly positioned under the buffering effect of the spring clips. It is evident that the end plate structure provided in this embodiment of the invention effectively avoids problems such as damage and blockage caused by direct collision between the magnets and the end plate during assembly, significantly improving assembly quality and thus enhancing the operational stability and service life of the rotor assembly. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the rotor assembly structure provided in this embodiment of the utility model;

[0028] Figure 2 Exploded view of the rotor assembly provided in the embodiment of this utility model;

[0029] Figure 3 This is a schematic diagram of the first embodiment of the end plate structure provided by this utility model from a first perspective.

[0030] Figure 4 This is a schematic diagram of the end plate structure from a second perspective of the first embodiment provided by this utility model.

[0031] Figure 5 This is a partial structural diagram of the end plate structure provided in the first embodiment of the present utility model.

[0032] Figure 6 This is a schematic diagram of the first view of the second embodiment of the end plate structure provided by this utility model.

[0033] Figure 7 This is a schematic diagram of the second perspective of the end plate structure provided in the embodiment of the present utility model.

[0034] Figure 8 This is a partial structural diagram of the end plate structure provided in the second embodiment of the present utility model.

[0035] Figure 9A schematic diagram of the magnet structure provided for an embodiment of this utility model.

[0036] Icons: 10-Rotor assembly; 100-End plate structure; 110-End plate; 111-Through hole; 112-Mounting part; 120-Spring; 121-Connecting part; 122-Abutting part; 200-Rotor core; 210-Magnet hole; 300-Magnet; 400-Balance block; 500-Fixing component. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0039] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0041] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] Existing motor rotor assemblies typically consist of end plates, rotor cores, rivets, and magnets. During assembly, the magnets need to be placed into the magnet holes in the rotor core and allowed to slide down to the end plates under their own weight. However, due to the lack of a buffer structure in the end plates, the magnets collide with the end plates, potentially causing mechanical damage such as breakage or chipping of the magnets. This can also lead to magnet detachment, blocking pipelines or jamming the pump body, severely impacting the safe operation and service life of the equipment.

[0044] Based on the problems existing in the current technology, please refer to Figure 1 and Figure 2 This utility model provides a rotor assembly 10 to avoid rigid collision between the magnet 300 and the end plate 110 during assembly, thereby improving assembly safety and product reliability, preventing chain failures caused by damage to the magnet 300, and thus satisfying the high-precision assembly and long-term operational stability of the rotor assembly 10.

[0045] In this embodiment, the rotor assembly 10 includes an end plate structure 100, a rotor core 200, magnets 300, balance blocks 400, and a fixing member 500. The rotor core 200 is provided with magnet holes 210, and the magnets 300 are disposed in the magnet holes 210. Two end plate structures 100 are respectively disposed at both ends of the rotor core 200, and two balance blocks 400 are respectively disposed at the two end plate structures 100. The fixing member 500 passes through the rotor core 200 and the end plate structures 100 and balance blocks 400 located on both sides of the rotor core 200.

[0046] Optionally, fastener 500 may be, but is not limited to, a rivet.

[0047] Furthermore, rush to read Figures 3 to 9 The end plate structure 100 includes an end plate 110 and a spring piece 120.

[0048] The end plate 110 is provided with a plurality of through holes 111, which are arranged in a ring around the center of the end plate 110. At least two spring pieces 120 are provided at each through hole 111, which are arranged opposite or back to each other.

[0049] In this embodiment, the multiple through holes 111 are configured one-to-one with the multiple magnet holes 210 provided on the rotor core 200. Therefore, at least two spring pieces 120 provided on the same through hole 111 can effectively buffer the magnets 300 provided in the corresponding magnet holes 210. The provision of at least two opposite or back-to-back spring pieces 120 can not only increase the contact area between the spring pieces 120 and the magnets 300, thereby improving the buffering effect, but also make the magnets 300 relatively balanced under the force, ensuring that the magnets 300 are smoothly positioned under the buffering effect of the spring pieces 120.

[0050] Therefore, the end plate structure 100 provided in this embodiment of the present invention effectively avoids problems such as damage and blockage caused by direct collision between the magnet 300 and the end plate 110 during assembly, significantly improving the assembly quality and thus enhancing the operational stability and service life of the rotor assembly 10.

[0051] In addition, in other embodiments of this utility model, at least two spring pieces 120 may be arranged in the same direction, which is not specifically limited here.

[0052] Understandably, the spring 120 and the end plate 110 can be manufactured using an integrated stamping process, which is simple and low-cost, and can be adapted to existing production lines without requiring modification of riveting equipment, thus offering good economic efficiency and compatibility. The spring 120 can be made of stainless steel, which has non-magnetic properties, providing both good elasticity and durability.

[0053] Furthermore, the spring 120 includes a connecting portion 121 and an abutting portion 122 connected to each other, with the connecting portion 121 inclined relative to the end plate 110. Therefore, the connecting portion 121, the abutting portion 122, and the end plate 110 are manufactured using an integrated stamping process.

[0054] In some embodiments of this utility model, such as Figures 3 to 5 As shown, there are two spring pieces 120. The connecting part 121 of the two adjacent spring pieces 120 is connected to the sidewalls at both ends of the through hole 111, and the abutting part 122 of the two adjacent spring pieces 120 are arranged opposite to each other.

[0055] Therefore, the abutment portion 122 of the two adjacent spring pieces 120 together buffers the magnet 300, which can effectively buffer the magnet 300 and make the magnet 300 relatively balanced in force, avoiding the magnet 300 from colliding with the end plate 110 and being damaged during assembly, thereby improving the assembly quality and thus improving the operating stability and service life of the rotor assembly 10.

[0056] It should be noted that there can be multiple spring pieces 120. Two adjacent spring pieces 120 are arranged in pairs, and multiple pairs of opposite spring pieces 120 are arranged sequentially along the extension length direction of the through hole 111 on the plane of the end plate 110.

[0057] Of course, in other embodiments of this utility model, such as Figures 6 to 8 As shown, there are two spring pieces 120. The end plate 110 has a mounting part 112 in the middle of the through hole 111. The connecting parts 121 of two adjacent spring pieces 120 are connected to the mounting part 112 respectively, and the abutting parts 122 of two adjacent spring pieces 120 are arranged opposite to each other.

[0058] Similarly, the abutment portions 122 of two adjacent spring pieces 120 work together to buffer the magnet 300, which can effectively buffer the magnet 300 and make the magnet 300 relatively balanced in force, avoiding the magnet 300 from colliding with the end plate 110 and breaking during assembly, thereby improving the assembly quality and thus improving the operating stability and service life of the rotor assembly 10.

[0059] It should be noted that there can be multiple spring pieces 120. Two adjacent spring pieces 120 are arranged in pairs, and multiple pairs of opposite spring pieces 120 are arranged sequentially along the extension direction of the through hole 111 on the plane of the end plate 110.

[0060] Furthermore, the extending direction of the abutting portion 122 is consistent with the extending direction of the through hole 111, which is beneficial for the processing of the connecting portion 121 and the abutting portion 122.

[0061] Specifically, one end of the abutment portion 122 is connected to the connecting portion 121, and the other end extends along the extension direction of the through hole 111 on the plane of the end plate 110. In other words, the projection of the abutment portion 122 on the plane of the end plate 110 does not coincide with the end plate 110, that is, its projection is located at the through hole 111 of the end plate 110.

[0062] Furthermore, the abutment portion 122 is arranged parallel to the end plate 110, that is, the top wall of the abutment portion 122 is located on the same plane, and the abutment portions 122 of at least two spring pieces 120 located in the same through hole 111 are used together to contact the magnet 300.

[0063] Therefore, by having the abutting portions 122 of at least two spring pieces 120 jointly form a plane that contacts the magnet 300, not only can the contact area between the abutting portion 122 and the magnet 300 be increased, but the buffering force on the magnet 300 can also be enhanced, thereby effectively preventing the magnet 300 from colliding with the end plate 110 and being damaged.

[0064] In detail, as shown in the figure, the length of the connecting part 121 is L1 and the width of the magnet 300 is L2, then the following condition is satisfied: 2 < L2 / L1 < 4.

[0065] Specifically, this ratio indicates that the width of the magnet 300 is greater than twice the length of the connecting part 121, but not more than four times it; for example, the ratio of the width of the magnet 300 to the length of the connecting part 121 can be 2.5, 3.0, 3.5, etc. Of course, the ratio can also be other values ​​between 2 and 4, which are not specifically limited here.

[0066] This design ensures that the magnet 300 can stably contact the abutment part 122 during installation, while preventing the installation angle of the magnet 300 from shifting or the connection part 121 from being overly stressed due to an excessively short connection part 121, thus avoiding structural failure. This ratio range helps to achieve a balance between the reliability of the magnet 300 installation and the load-bearing capacity of the connection part 121, thereby improving the overall structural stability and assembly accuracy of the end plate 110.

[0067] Furthermore, since the top and bottom walls of the abutment portion 122 are parallel to the end plate 110, the thickness of the end plate 110 is H1, and the distance between the bottom wall of the abutment portion 122 and the bottom wall of the end plate 110 is H2, then the following condition is satisfied: 0 < H2 / H1 < 0.8.

[0068] The ratio of the distance between the bottom wall of the abutment portion 122 and the bottom wall of the end plate 110 to the thickness of the end plate 110 is limited to 0 to 0.8. For example, the ratio of the distance between the bottom wall of the abutment portion 122 and the bottom wall of the end plate 110 to the thickness of the end plate 110 can be 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, etc. Of course, the ratio can also be other values ​​between 0 and 0.8, which are not specifically limited here.

[0069] This design ensures a rational structural design for the abutment portion 122. This design allows the abutment portion 122 to more evenly distribute the force to the end plate 110 body when subjected to the abutment force from the magnet 300, avoiding localized stress concentration caused by the abutment portion 122 being too high or too low. Furthermore, this arrangement helps maintain the parallel contact between the end plate 110 and the magnet 300, preventing tilting or sliding due to assembly deviations, thereby improving the structural fit accuracy and operational safety.

[0070] The width of the spring 120 is W1, and the thickness of the magnet 300 is L3. Then the following condition is met: 0.2 < W1 / L3 < 1.

[0071] The ratio of the width of the spring piece 120 to the thickness of the magnet 300 is limited to 0.2 to 1. For example, the ratio of the width of the spring piece 120 to the thickness of the magnet 300 can be 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, etc. Of course, the ratio can also be other values ​​between 0.2 and 1, which are not specifically limited here.

[0072] This design ensures that the spring piece 120 has sufficient width to provide stable elastic support while avoiding interference with adjacent structures due to excessive width. Furthermore, it improves the uniformity of deformation under pressure, enabling the spring piece 120 to have good fit and resilience when in contact with the magnet 300 or other components, thereby enhancing the adaptability and service life of the entire end plate structure 100 under dynamic operating conditions.

[0073] It should be noted that the dimensions shown in the accompanying drawings are for illustrative purposes only and do not represent actual dimensions or proportions.

[0074] Furthermore, the two adjacent through holes 111 extend at an angle to each other on the plane of the end plate 110 and are arranged in groups, and the multiple groups of through holes 111 are arranged in rotational symmetry about the center of the end plate 110.

[0075] In this embodiment, the multiple sets of through holes 111 are arranged in a rotationally symmetrical manner about the center of the end plate 110. That is, after the end plate 110 is rotated around the center by a certain angle, the rotated end plate 110 is completely identical to the end plate structure 100 before rotation. Therefore, by setting the multiple sets of through holes 111 to be rotationally symmetrical about the center of the end plate 110, the entire end plate 110 can maintain good symmetry and balance when subjected to force.

[0076] Specifically, such as Figure 4 and Figure 7 As shown, the end plate 110 has eight sets of through holes 111. The eight sets of through holes 111 are evenly arranged around the end plate 110. Two through holes 111 in each set have one end close to the edge of the end plate 110, and the other end extends in a direction away from the edge of the end plate 110 and is close to each other.

[0077] Of course, in other embodiments of this utility model, the number of groups of through holes 111 can be other numbers, which are not specifically limited here.

[0078] In summary, this utility model provides an end plate structure 100 and a rotor assembly 10. Multiple through holes 111 correspond one-to-one with multiple magnet holes 210 on the rotor core 200. Therefore, at least two spring pieces 120 disposed on the same through hole 111 can effectively buffer the magnets 300 disposed in the corresponding magnet holes 210. The placement of at least two opposing or back-to-back spring pieces 120 not only increases the contact area between the spring pieces 120 and the magnets 300, thereby improving the buffering effect, but also ensures that the magnets 300 are subjected to relatively balanced forces, guaranteeing that the magnets 300 are smoothly positioned under the buffering effect of the spring pieces 120. It is evident that the end plate structure 100 provided by this utility model effectively avoids damage and blockage caused by direct collision between the magnets 300 and the end plate 110 during assembly, significantly improving assembly quality and thus enhancing the operational stability and service life of the rotor assembly 10.

[0079] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An end plate structure, characterized in that, The end plate structure includes an end plate (110) and a spring sheet (120). The end plate (110) is provided with a plurality of through holes (111), which are arranged in a ring around the center of the end plate (110). The plurality of through holes (111) are used to correspond one-to-one with the plurality of magnet holes (210) of the rotor core (200). At least two spring pieces (120) are provided at each of the through holes (111) that are opposite or back to each other.

2. The end plate structure according to claim 1, characterized in that, The spring piece (120) includes a connecting part (121) and an abutting part (122) connected to each other. The connecting part (121) is inclined relative to the end plate (110). The connecting parts (121) of two adjacent spring pieces (120) are respectively connected to the side walls at both ends of the through hole (111). The abutting parts (122) of two adjacent spring pieces (120) are arranged opposite to each other.

3. The end plate structure according to claim 1, characterized in that, The spring piece (120) includes a connecting part (121) and an abutting part (122) connected to each other. The connecting part (121) is inclined relative to the end plate (110). The end plate (110) has a mounting part (112) in the middle of the through hole (111). The connecting parts (121) of two adjacent spring pieces (120) are respectively connected to the mounting part (112). The abutting parts (122) of two adjacent spring pieces (120) are arranged opposite to each other.

4. The end plate structure according to claim 2 or 3, characterized in that, The abutting part (122), the connecting part (121), and the end plate (110) are made by an integrated stamping process.

5. The end plate structure according to claim 2 or 3, characterized in that, The abutment portion (122) is parallel to the end plate (110), and the abutment portions (122) of at least two of the spring pieces (120) located in the same through hole (111) are used together to contact the magnet (300).

6. The end plate structure according to claim 2 or 3, characterized in that, The abutting part (122) is used to abut against the magnet (300). The length of the connecting part (121) is L1 and the width of the magnet (300) is L2, which satisfies: 2 < L2 / L1 < 4.

7. The end plate structure according to claim 2 or 3, characterized in that, The top and bottom walls of the abutment part (122) are parallel to the end plate (110). The thickness of the end plate (110) is H1, and the distance between the bottom wall of the abutment part (122) and the bottom wall of the end plate (110) is H2. Then, the following condition is satisfied: 0 < H2 / H1 < 0.

8.

8. The end plate structure according to claim 2 or 3, characterized in that, The width of the spring piece (120) is W1, and the thickness of the magnet (300) is L3, then the following condition is satisfied: 0.2 < W1 / L3 < 1.

9. The end plate structure according to claim 1, characterized in that, The two adjacent through holes (111) are arranged in a group at an angle to each other on the plane of the end plate (110), and the multiple groups of through holes (111) are arranged in a rotationally symmetrical manner about the center of the end plate (110).

10. A rotor assembly (10), characterized in that, The device includes a rotor core (200), magnets (300), balance blocks (400), a fixing member (500), and an end plate structure as described in any one of claims 1-9. The rotor core (200) is provided with a magnet hole (210), the magnet (300) is disposed in the magnet hole (210), two end plate structures are respectively disposed at both ends of the rotor core (200), two balance blocks (400) are respectively disposed on the two end plate structures, and the fixing member (500) passes through the rotor core (200) and the end plate structures and balance blocks (400) located on both sides of the rotor core (200).

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