Rotor pressing structure, rotor and motor

Abstract

The application relates to a rotor pressing structure, a rotor and a motor, and discloses a rotor pressing structure, which comprises a tooth pressing groove plate arranged at one end of a rotor core in the axial direction, at least part of a tooth portion of the tooth pressing groove plate is attached to an end surface of the rotor core, a plurality of tooth pressing groove plates are arranged in correspondence with the tooth portion of the tooth pressing groove plate, a guide portion is arranged at a first end surface of the tooth pressing groove plate arranged in the axial direction, the guide portion is attached to the tooth portion, and at least part of the tooth portion away from the central region of the tooth pressing groove plate is bent towards the rotor core. The guide portion is arranged on the end surface of the tooth pressing groove plate close to the tooth pressing groove plate. When the tooth pressing groove plate and the tooth pressing groove plate are connected through resistance spot welding, the tooth portion of the tooth pressing groove plate is bent towards the rotor core under the action of the guide portion, each tooth portion of the tooth pressing groove plate is attached to the rotor core, the tooth portion effectively presses the rotor core, the structure of the rotor core is stable during high-speed rotation, and the product quality is improved.

Description

Technical Field

[0001] This application relates to the field of generator technology, specifically to a rotor clamping structure, a rotor, and a motor. Background Technology

[0002] In recent years, due to the trend towards larger generators, the size of rotor tooth pressure plates has also increased. Existing rotor pre-bent tooth pressure plates, due to the lack of machining on both ends, suffer from poor contact between the teeth and the core due to factors such as the flatness of the raw materials and the plate thickness. Consequently, the teeth of the rotor pre-bent tooth pressure plate cannot effectively press against the core, making it difficult for the core to maintain structural stability during high-speed rotation and affecting product quality. Utility Model Content

[0003] In view of this, this application provides a rotor clamping structure, a rotor, and a motor to solve the problem that the teeth of the existing rotor pre-bent tooth clamping plate have poor contact effect with the iron core, and the teeth of the rotor pre-bent tooth clamping plate cannot effectively clamp the iron core, making it impossible for the iron core to maintain structural stability when rotating at high speed, thus affecting product quality.

[0004] In a first aspect, embodiments of this application provide a rotor clamping structure, comprising:

[0005] A toothed slotted plate is axially disposed at one end of the rotor core, and at least a portion of the teeth of the toothed slotted plate is in contact with the end face of the rotor core.

[0006] Multiple toothed slot pieces are disposed at one end of the toothed slot plate away from the rotor core and are arranged circumferentially, with each toothed slot piece corresponding to a tooth of the toothed slot plate.

[0007] A guide portion is provided on the first end face of the toothed groove plate arranged axially. The guide portion and the tooth portion are in contact, so that at least a portion of the tooth portion away from the central region of the toothed groove plate bends toward the rotor core.

[0008] A pressure ring is disposed on the second end face of the plurality of toothed pressure grooves arranged axially, and the pressure ring is adapted to abut against at least a portion of the plurality of toothed pressure grooves.

[0009] Beneficial effects: A guide part is provided on the end face of the toothed slot plate near the toothed slot plate. The guide part and the toothed slot plate are in contact. When the toothed slot plate and the toothed slot plate are resistance spot welded together, the toothed slot plate bends towards the rotor core under the action of the guide part, so that each tooth of the toothed slot plate is in contact with the rotor core, thereby achieving effective pressing of the toothed slot plate against the rotor core, maintaining the structural stability of the rotor core when rotating at high speed, and improving product quality.

[0010] Optionally, the second end face is set to a horizontal plane, and a pressure ring is provided on the outer sleeve of the pressure ring, with one end of the pressure ring abutting against the second end face of the plurality of toothed pressure groove pieces.

[0011] Beneficial effects: A guide is provided on the side of the tooth pressure groove plate near the tooth. The guide ensures that the tooth bends towards the rotor core while the second end face of the tooth pressure groove plate can be set as a horizontal plane. A pressure ring can then be set on the horizontal plane. The pressure ring moves the yielding zone in the stacked state towards the tooth of the tooth pressure groove plate, thereby pressing the rotor core and eliminating the tooth springing.

[0012] Optionally, the guide portion is a guide slope disposed on the tooth pressure groove plate, and the thickness of the guide slope gradually increases from the center of the tooth pressure groove plate outward.

[0013] Beneficial effects: The guide slope and the teeth of the tooth pressure groove plate make progressive contact. The guide slope provides effective support for the teeth and enables the teeth to bend along the guide slope, effectively pressing the rotor core.

[0014] Optionally, a first limiting member is provided between the tooth pressure groove plate and the tooth pressure groove piece, the first limiting member being adapted to restrict the movement of the tooth pressure groove piece relative to the tooth pressure groove plate.

[0015] Beneficial effects: The first limiting component can limit the tooth pressure groove plate and the tooth pressure groove piece. The first limiting component can not only realize the welding positioning of the tooth pressure groove piece and the tooth pressure groove plate, but also prevent the tooth pressure groove piece from detaching from the tooth pressure groove plate, thereby improving the connection strength between the tooth pressure groove plate and the tooth pressure groove piece.

[0016] Optionally, the first limiting member includes a first protrusion and a first recess, one of the tooth pressure groove plate and the tooth pressure groove piece is provided with the first protrusion, and the other is provided with a first recess that is adapted to the first protrusion.

[0017] Beneficial effect: By utilizing the first protrusion and the first recess, the positioning of the tooth pressure groove plate and the tooth pressure groove piece can be quickly achieved.

[0018] Optionally, a second limiting member is provided between the toothed pressure groove plate and the pressure ring, the second limiting member being adapted to restrict the movement of the toothed pressure groove plate relative to the pressure ring.

[0019] Beneficial effect: The second limiting component can limit the tooth pressure groove piece and the pressure ring, preventing the tooth pressure groove piece from falling off relative to the pressure ring.

[0020] Optionally, the second limiting member includes a second protrusion and a second recess, wherein one of the toothed groove and the pressure ring is provided with the second protrusion, and the other is provided with a second recess that is adapted to the second protrusion.

[0021] Beneficial effect: By utilizing the second protrusion and the second recess, the pressure ring and the toothed pressure groove are quickly connected, preventing the toothed pressure groove from falling off.

[0022] Optionally, the pressure ring is configured as a stepped structure having a first stepped surface and a second stepped surface, the first stepped surface passing through the central perforation of the toothed pressure groove plate and extending to the end of the toothed pressure groove plate away from the toothed pressure groove piece, and the second stepped surface abutting against the plurality of toothed pressure groove pieces.

[0023] Beneficial effects: The pressure ring is designed with a stepped structure, incorporating the thickness of the toothed pressure groove plate and the toothed pressure groove piece into the pressure ring, thereby increasing the thickness of the pressure ring and thus improving its stiffness.

[0024] Secondly, embodiments of this application provide a rotor including the rotor clamping structure described in any of the preceding claims.

[0025] Beneficial effects: The rotor has the rotor clamping structure described above, which makes each tooth of the tooth clamping plate fit against the rotor core, thereby achieving effective clamping of the teeth against the rotor core and maintaining the working quality of the rotor.

[0026] Thirdly, embodiments of this application provide an electric motor that includes the rotor clamping structure described in any of the preceding claims, or includes the rotor described in the preceding claims.

[0027] Beneficial effects: The motor has the rotor clamping structure described above, which makes each tooth of the tooth clamping plate fit against the rotor core, thereby effectively clamping the rotor core with the teeth, maintaining the working quality of the rotor, and thus improving the quality of the motor. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram showing the positional relationship between the rotor clamping structure and the rotor core in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram showing the positional relationship between the pressure ring and the pressure collar in an embodiment of this application;

[0031] Figure 3 This is an exploded view of the rotor clamping structure according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram showing the connection relationship between the tooth pressure groove piece and the tooth pressure groove plate in an embodiment of this application;

[0033] Figure 5 This is a schematic diagram showing the positional relationship between the toothed groove piece and the guide portion in an embodiment of this application;

[0034] Figure 6 This is a schematic diagram showing the positional relationship between the first recess and the tooth pressure groove plate in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the pressure ring structure according to an embodiment of this application;

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Tooth pressure groove plate; 101. Tooth part; 102. Yoke part; 2. Rotor core; 3. Tooth pressure groove plate; 4. Guide part; 5. Pressure ring; 501. First step surface; 502. Second step surface; 6. Pressure ring; 701. First protrusion; 702. First recess; 801. Second protrusion; 802. Second recess; 9. Chamfered part. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] Please refer to Figures 1-7 In the first aspect, the embodiments of this application provide a rotor clamping structure, which includes a toothed groove plate 1, a plurality of toothed groove pieces 3, a guide part 4, a pressure ring 5 and a pressure ring 6. There are two rotor clamping structures, and the two rotor clamping structures are respectively disposed at both ends of the rotor core 2 to achieve clamping at both ends of the rotor core 2.

[0040] The rotor clamping structure includes a toothed slotted plate 1, which is axially disposed at one end of the rotor core 2. At least a portion of the teeth 101 of the toothed slotted plate 1 is in contact with the end face of the rotor core 2. The toothed slotted plate 1 includes teeth 101 and a yoke 102. The yoke 102 has an annular structure, and multiple teeth 101 are arranged along the outer peripheral wall of the yoke 102. The teeth 101 correspond to and are in contact with the rotor core 2, thereby clamping the rotor core 2.

[0041] The rotor clamping structure also includes multiple toothed groove pieces 3, which are disposed at the end of the toothed groove plate 1 away from the rotor core 2 and are arranged circumferentially. The multiple toothed groove pieces 3 are respectively disposed corresponding to the teeth 101 of the toothed groove plate 1. A guide part 4 is disposed on the first end face of the toothed groove piece 3 arranged axially. The guide part 4 and the teeth 101 are in contact, so that at least a portion of the teeth 101 away from the central area of ​​the toothed groove plate 1 bends toward the rotor core 2.

[0042] In this embodiment, the tooth pressure groove piece 3 is disposed at one end of the tooth pressure groove plate 1, and multiple tooth pressure groove pieces 3 are arranged in a ring shape to form a ring structure. The central axis of the formed ring structure is coaxial with the central axis of the tooth pressure groove plate 1. Multiple guide parts 4 are provided, and each tooth pressure groove plate 1 is provided with a guide part 4, and the surface of the guide part 4 is in contact with the surface of the tooth part 101.

[0043] In this way, the toothed slot plate 1 and the toothed slot piece 3 do not need to be pre-bent. When the toothed slot piece 3 and the toothed slot plate 1 are resistance-spot welded together, the teeth 101 of the toothed slot plate 1 bend towards the rotor core 2 under the action of the guide part 4, so that each tooth 101 of the toothed slot plate 1 fits against the rotor core 2, thereby achieving effective pressing of the teeth 101 against the rotor core 2, maintaining the structural stability of the rotor core 2 when rotating at high speed, and improving product quality.

[0044] The rotor clamping structure also includes a pressure ring 5, which is disposed on the second end face of a plurality of toothed pressure groove plates 3 arranged axially. The pressure ring 5 is adapted to abut against at least a portion of the plurality of toothed pressure groove plates 3. The pressure ring 5 is used to clamp the toothed pressure groove plates 3, and both ends of the pressure ring 5 are machined to make both ends of the pressure ring 5 smooth planes, thereby reducing the gap between the pressure ring 5 and the toothed pressure groove plates 3.

[0045] Furthermore, referring to Figure 5 The toothed pressure groove 3 is provided with a chamfered portion 9. The annular structure formed by multiple toothed pressure grooves 3 has a central axis. The chamfered portion 9 is located at the end of the toothed pressure groove 3 away from the central axis, and at the corner of the toothed pressure groove 3 away from the tooth portion 101. In this way, the corner of the toothed pressure groove 3 is chamfered, so that the pressing pressure is distributed along the chamfered surface, avoiding microcracks or fatigue failure caused by local stress concentration at the corner, and improving the service life of the toothed pressure groove 3. At the same time, the chamfered portion 9 optimizes the geometry of the corner, blocking or weakening the magnetic flux entering the toothed pressure groove 3, thereby reducing magnetic flux loss.

[0046] Optionally, refer to Figure 1 , Figure 2 , Figure 3 The second end face is set to a horizontal plane, and the pressure ring 5 is covered with a pressure ring 6. One end of the pressure ring 6 abuts against the second end face of the multiple toothed pressure groove pieces 3.

[0047] In this embodiment, a guide portion 4 is provided on the side of the toothed groove plate 3 near the tooth portion 101. The guide portion 4 ensures that the tooth portion 101 bends towards the rotor core 2, and the toothed groove plate 3 does not require pre-bending treatment. This makes the end face of the toothed groove plate 3 away from the toothed groove plate 1 a horizontal plane, which facilitates the setting of the pressure ring 6 to press the toothed groove plate 3. The pressure ring 6 presses the toothed groove plate 3, which can move the yielding zone in the stacked state towards the tooth portion 101 of the toothed groove plate 1, thereby pressing the rotor core 2 and eliminating the tooth portion 101 from springing out.

[0048] Optionally, refer to Figure 5 The guide part 4 is a guide slope provided on the tooth pressure groove plate 3, and the thickness of the guide slope gradually expands from the center of the tooth pressure groove plate 1 to the outside.

[0049] In this embodiment, the annular structure formed by multiple toothed groove plates 3 has a central axis, and the thickness of the guide slope gradually increases in the direction away from the central axis, forming an inclined surface on the end face of the toothed groove plate 3 near the tooth 101. In this way, the guide slope and the tooth 101 of the toothed groove plate 1 make progressive contact, and the guide slope provides effective support for the tooth 101. During resistance spot welding, the tooth 101 is bent along the guide slope, effectively pressing the rotor core 2.

[0050] Preferably, the guide portion 4 and the toothed groove plate 3 are integrally formed structures, and the end face of the toothed groove plate 3 is machined to form a guide bevel. In this way, the processing cost of the guide portion 4 and the toothed groove plate 3 is low, and the connection strength is high.

[0051] Preferably, the thickness of the guide slope at the end of the tooth pressure groove 3 is set to 1.2-1.7 mm, for example, 1.5 mm.

[0052] Preferably, the side of the guide slope is flush with the side of the end face of the tooth pressure groove 3, thereby increasing the contact area between the guide slope and the tooth 101 and effectively driving the tooth 101 to bend.

[0053] Optionally, a first limiting member is provided between the tooth pressure groove plate 1 and the tooth pressure groove piece 3, the first limiting member being adapted to restrict the movement of the tooth pressure groove piece 3 relative to the tooth pressure groove plate 1.

[0054] In this embodiment, the first limiting member can limit the tooth pressure groove plate 1 and the tooth pressure groove piece 3. The first limiting member can not only realize the welding positioning of the tooth pressure groove piece 3 and the tooth pressure groove plate 1, but also prevent the tooth pressure groove piece 3 from detaching from the tooth pressure groove plate 1, thereby improving the connection strength between the tooth pressure groove plate 1 and the tooth pressure groove piece 3.

[0055] Optionally, refer to Figure 4 , Figure 5 , Figure 6The first limiting member includes a first protrusion 701 and a first recess 702. One of the tooth pressure groove plate 1 and the tooth pressure groove piece 3 is provided with the first protrusion 701, and the other is provided with the first recess 702 adapted to the first protrusion 701.

[0056] In this embodiment, the toothed groove plate 3 is provided with a first protrusion 701 and the toothed groove plate 1 is provided with a first recess 702 as an example for illustrative purposes. The yoke portion 102 of the toothed groove plate 1 is provided with a plurality of first recesses 702 along the circumferential direction. The first recess 702 is a groove recessed into the yoke portion 102 or a through-hole penetrating the yoke portion 102. The first protrusion 701 is provided on the toothed groove plate 3 and corresponds to the first recess 702. The first protrusion 701 is a protrusion protruding from the surface of the toothed groove plate 3. By embedding the first protrusion 701 into the first recess 702, the toothed groove plate 3 and the toothed groove plate 1 are connected and limited.

[0057] Of course, in addition to the above-mentioned embodiment in which the tooth pressure groove plate 3 is provided with a first protrusion 701 and the tooth pressure groove plate 1 is provided with a first recess 702, the tooth pressure groove plate 3 may also be provided with a first recess 702 and the tooth pressure groove plate 1 may be provided with a first protrusion 701.

[0058] Optionally, a second limiting member is provided between the toothed pressure groove 3 and the pressure ring 5, the second limiting member being adapted to restrict the movement of the toothed pressure groove 3 relative to the pressure ring 5.

[0059] In this embodiment, the second limiting member can limit the tooth pressure groove piece 3 and the pressure ring 5 to prevent the tooth pressure groove piece 3 from falling off relative to the pressure ring 5.

[0060] Optionally, refer to Figure 5 , Figure 7 The second limiting member includes a second protrusion 801 and a second recess 802. One of the toothed groove plate 3 and the pressure ring 5 is provided with the second protrusion 801, and the other is provided with the second recess 802 adapted to the second protrusion 801.

[0061] In this embodiment, a second protrusion 801 is provided on the pressure ring 5 and a second recess 802 is provided on the toothed groove plate 3 as an example for illustrative purposes. Multiple second protrusions 801 are provided on the end face of the pressure ring 5 near the toothed groove plate 3, and a second recess 802 is provided on the end face of the toothed groove plate 3 near the pressure ring 5. The second protrusion 801 is a protrusion protruding from the end face of the pressure ring 5, and the second recess 802 is a groove recessed into the surface of the toothed groove plate 3. By embedding the second protrusion 801 into the second recess 802, the pressure ring 5 and the toothed groove plate 3 are positioned accordingly.

[0062] Preferably, the second protrusion 801 is an annular structure protruding from the surface of the pressure ring 5, and multiple second recesses 802 are engaged with the annular structure. In this way, the second protrusion 801 can be directly machined from the surface of the pressure ring 5, thereby reducing production costs.

[0063] Of course, besides the embodiment where the pressure ring 5 has a second protrusion 801 and the toothed groove plate 3 has a second recess 802, the pressure ring 5 can also have a second recess 802 and the toothed groove plate 3 has a second protrusion 801. For example, a groove can be formed by machining the end face of the pressure ring 5, and the second protrusion 801 of the toothed groove plate 3 can be placed into the groove, which can also limit the pressure ring 5 and the toothed groove plate 3 and prevent the toothed groove plate 3 from falling off.

[0064] Optionally, refer to Figure 7 The pressure ring 5 is configured as a stepped structure with a first stepped surface 501 and a second stepped surface 502. The first stepped surface 501 passes through the central hole of the tooth pressure groove plate 1 and extends to the end of the tooth pressure groove plate 1 away from the tooth pressure groove piece 3. The second stepped surface 502 abuts against the multiple tooth pressure groove pieces 3.

[0065] In this embodiment, the pressure ring 5 is machined to form a stepped structure. The pressure ring 5 has a first step surface 501 and a second step surface 502. The first step surface 501 passes through the center of the multiple toothed pressure groove pieces 3 and the center hole of the yoke portion 102 of the toothed pressure groove plate 1. The first step surface 501 is preferably flush with the end face of the toothed pressure groove plate 1 away from the toothed pressure groove pieces 3. The second step surface 502 of the pressure ring 5 abuts against the multiple toothed pressure groove pieces 3, and the toothed pressure groove pieces 3 are pressed by the second step surface 502.

[0066] In this way, an assembly space is formed between the first step surface 501 and the second step surface 502, and the thickness of the assembly space along the circumferential direction is equal to the overall thickness of the tooth pressure groove plate 1, the tooth pressure groove piece 3, and the guide part 4. On the one hand, this increases the overall thickness of the pressure ring 5, improving its rigidity; on the other hand, it reduces the axial dimension of the rotor clamping structure, making the overall structure of the rotor clamping structure more compact.

[0067] Secondly, embodiments of this application provide a rotor including the rotor clamping structure described above.

[0068] In this embodiment, the rotor has the rotor pressing structure described above, so that each tooth 101 of the tooth pressing plate 1 fits against the rotor core 2, thereby achieving effective pressing of the tooth 101 against the rotor core 2 and maintaining the working quality of the rotor.

[0069] Thirdly, embodiments of this application provide an electric motor that includes the rotor clamping structure described above, or includes the rotor described above.

[0070] In this embodiment, the motor has the rotor pressing structure described above, which makes each tooth 101 of the tooth pressing plate 1 fit with the rotor core 2, thereby achieving effective pressing of the tooth 101 against the rotor core 2, maintaining the working quality of the rotor, and thus improving the quality of the motor.

[0071] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A rotor clamping structure, characterized in that, include: A toothed groove plate (1) is axially disposed at one end of the rotor core (2), and at least a portion of the teeth (101) of the toothed groove plate (1) is in contact with the end face of the rotor core (2). Multiple toothed slot pieces (3) are disposed at one end of the toothed slot plate (1) away from the rotor core (2) and are arranged in a circumferential manner. The multiple toothed slot pieces (3) are respectively disposed corresponding to the teeth (101) of the toothed slot plate (1). A guide portion (4) is provided on the first end face of the tooth pressure groove plate (3) arranged axially. The guide portion (4) and the tooth portion (101) are in contact with each other so that at least part of the tooth portion (101) is bent toward the rotor core (2) away from the central region of the tooth pressure groove plate (1). A pressure ring (5) is disposed on the second end face of the plurality of toothed pressure groove pieces (3) arranged axially, and the pressure ring (5) is adapted to abut against at least a portion of the plurality of toothed pressure groove pieces (3).

2. The rotor clamping structure according to claim 1, characterized in that, The second end face is set as a horizontal plane, and the pressure ring (5) is covered with a pressure ring (6), one end of the pressure ring (6) abuts against the second end face of the plurality of toothed pressure groove pieces (3).

3. The rotor clamping structure according to claim 1, characterized in that, The guide part (4) is a guide slope provided on the tooth pressure groove plate (3), and the thickness of the guide slope is gradually increased from the center of the tooth pressure groove plate (1) to the outside.

4. The rotor clamping structure according to claim 1, characterized in that, A first limiting member is provided between the tooth pressure groove plate (1) and the tooth pressure groove piece (3), and the first limiting member is adapted to restrict the movement of the tooth pressure groove piece (3) relative to the tooth pressure groove plate (1).

5. The rotor clamping structure according to claim 4, characterized in that, The first limiting member includes a first protrusion (701) and a first recess (702). One of the tooth pressure groove plate (1) and the tooth pressure groove piece (3) is provided with the first protrusion (701), and the other is provided with a first recess (702) adapted to the first protrusion (701).

6. The rotor clamping structure according to claim 1, characterized in that, A second limiting member is provided between the toothed pressure groove plate (3) and the pressure ring (5), and the second limiting member is adapted to restrict the movement of the toothed pressure groove plate (3) relative to the pressure ring (5).

7. The rotor clamping structure according to claim 6, characterized in that, The second limiting member includes a second protrusion (801) and a second recess (802). One of the toothed groove plate (3) and the pressure ring (5) is provided with the second protrusion (801), and the other is provided with a second recess (802) that is adapted to the second protrusion (801).

8. The rotor clamping structure according to any one of claims 1-7, characterized in that, The pressure ring (5) is configured as a stepped structure having a first stepped surface (501) and a second stepped surface (502). The first stepped surface (501) passes through the central hole of the tooth pressure groove plate (1) and extends to the end of the tooth pressure groove plate (1) away from the tooth pressure groove piece (3). The second stepped surface (502) abuts against the plurality of tooth pressure groove pieces (3).

9. A rotor, characterized in that, The rotor clamping structure includes any one of claims 1-8.

10. An electric motor, characterized in that, It includes the rotor clamping structure according to any one of claims 1-8, or includes the rotor according to claim 9.

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