Rotor structure of series excited machine

Abstract

The utility model discloses a rotor structure of a series motor, which relates to the technical field of motors, and is characterized in that the rotor structure comprises a rotor core and a rotating shaft, the center of the rotor core is provided with a shaft hole, the side wall of the shaft hole is provided with a plurality of clamping grooves, and the side wall of the rotating shaft is provided with a plurality of clamping blocks used for being clamped into the clamping grooves. The rotor iron core is provided with a mounting groove communicated with the shaft hole, and a sealing cover is detachably connected in the mounting groove and is used for abutting against the clamping block so that the clamping block can be fixed in the clamping groove. According to the rotor structure of the series excited motor, the rotating shaft can be prevented from loosening, the assembly firmness is ensured, the use effect of the rotor structure is ensured, the rotating shaft is made of stainless steel materials, and the durability is good.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to the rotor structure of a series-wound motor. Background Technology

[0002] A series-wound motor generally refers to a series-wound electric motor. A single-phase series-wound motor is commonly known as a series-wound motor because its excitation winding and field winding are connected in series. A single-phase series-wound motor is a universal AC / DC motor, meaning it can operate on either AC or DC power. The rotor is one of the most important components of a series-wound motor.

[0003] Existing rotors typically consist of a rotor core and a shaft. A shaft hole is located at the center of the rotor core, and the shaft is interference-fitted into this hole, thus achieving a fixed connection between the shaft and the rotor core. However, when assembling the shaft onto the rotor core, a press-fit method is usually used. Excessive assembly force can cause localized deformation of the shaft hole, resulting in uneven interference on the mating surfaces. This creates gaps between the shaft and the shaft hole, reducing the tightness of the fit. Consequently, during motor operation, the shaft may loosen, leading to an insecure assembly and affecting the rotor's performance. Utility Model Content

[0004] The purpose of this invention is to provide a rotor structure for a series-wound motor in order to solve the above-mentioned problems.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a rotor structure of a series-wound motor, including a rotor core and a shaft, wherein a shaft hole is provided at the center of the rotor core, and a plurality of slots are provided on the side wall of the shaft hole, and a plurality of locking blocks are provided on the side wall of the shaft for locking into the slots, and an installation groove communicating with the shaft hole is provided on the rotor core, wherein a cover is detachably connected to the installation groove, and the cover is used to abut against the locking blocks to fix the locking blocks inside the slots.

[0006] As a further feature of this invention, the cover includes an insert, the side wall of which is provided with an external thread structure, and the side wall of the mounting groove is provided with an internal thread structure that matches the external thread structure.

[0007] As a further feature of this invention, an elastic block is provided on the inner bottom wall of the card slot, and the total height of the elastic block and the card block is greater than the depth of the card slot.

[0008] As a further feature of this invention, the elastic block is made of rubber material.

[0009] As a further feature of this utility model, the cover also includes a cover plate disposed on the insert, the rotor core is provided with a groove for the cover plate to be inserted, and the cover plate is provided with a plurality of grooves.

[0010] As a further feature of this invention, the rotating shaft is made of stainless steel.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] In this invention, when assembling the rotating shaft onto the rotor core, the rotating shaft can be inserted into the shaft hole, causing the locking block to engage with the locking groove. The locking groove limits the locking block, achieving pre-positioning of the rotating shaft within the shaft hole. Then, the cover is fitted onto the rotating shaft and fixedly installed into the mounting groove. The cover then abuts against the locking block, securing it within the groove. This operation locks the rotating shaft within the shaft hole, achieving a secure connection between the rotating shaft and the rotor core. Because the rotating shaft connects to the shaft hole through the cooperation of the locking block and the locking groove, a press-fit method is not required, thus avoiding gaps and ensuring a high degree of connection strength. This prevents the rotating shaft from loosening, guarantees assembly stability, and ensures the effective use of the rotor structure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the transfer shaft and the cover of this utility model;

[0015] Figure 3 This is a schematic diagram of the rotor core structure in this utility model;

[0016] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0017] Reference numerals in the attached drawings: 1. Rotor core; 2. Shaft; 3. Shaft hole; 4. Slot; 5. Block; 6. Mounting groove; 7. Insert; 8. Elastic block; 9. Cover plate; 10. Insert groove; 11. Groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-4As shown, the rotor structure of the series-wound motor includes a rotor core 1 and a shaft 2. The shaft 2 is made of stainless steel, which has high strength and hardness and is not easily corroded, thus ensuring the durability of the rotor structure. A shaft hole 3 is provided at the center of the rotor core 1. Several slots 4 are provided on the side wall of the shaft hole 3, and several locking blocks 5 are provided on the side wall of the shaft 2 for engaging with the slots 4. An installation groove 6 communicating with the shaft hole 3 is provided on the rotor core 1, and a cover is detachably connected in the installation groove 6. The cover is used to abut against the locking blocks 5 to fix the locking blocks 5 inside the slots 4. When assembling the shaft 2 onto the rotor core 1, the shaft 2 can be inserted into the shaft hole 3, so that the locking blocks... 5. Then, the block 5 is inserted into the slot 4. The slot 4 limits the positioning of the block 5, which enables the shaft 2 to be pre-positioned in the shaft hole 3. Then, the cover is put into the shaft 2 and fixedly installed in the mounting groove 6. The cover will then abut against the block 5 and fix the block 5 in the slot 4. Through this operation, the shaft 2 can be locked in the shaft hole 3, realizing a firm connection between the shaft 2 and the rotor core 1. Since the shaft 2 is connected to the shaft hole 3 through the cooperation of the block 5 and the slot 4, there is no need to use the press-fit method for assembly, which can avoid the generation of gaps, and the connection is more secure. It prevents the shaft 2 from becoming loose and ensures the assembly is firm, thus ensuring the use effect of the rotor structure.

[0020] Please see Figures 2-4 As shown, the cover includes an insert 7. An external thread structure is provided on the side wall of the insert 7, and an internal thread structure matching the external thread structure is provided on the side wall of the mounting groove 6. By screwing the insert 7 into the mounting groove 6, a threaded connection is achieved, firmly abutting the locking block 5, thus fixing the locking block 5 inside the groove 4. The operation is relatively convenient. An elastic block 8 is provided on the inner bottom wall of the groove 4, and the total height of the elastic block 8 and the locking block 5 is greater than the groove depth of the groove 4. Therefore, after the insert 7 is screwed into the mounting groove 6, it will compress the locking block 5, causing the locking block 5 to descend and compress the elastic block 8. This causes the elastic block 8 to compress and deform, and the pressure on the elastic block 8 will push the insert 7 upward, causing the insert 7 to engage with the mounting groove 6. The threaded connection is more stable, making the connection of the locking block 5 in the locking groove 4 more secure, thus improving the assembly stability of the rotating shaft 2 on the rotor core 1. The elastic block 8 is made of rubber material and has high elasticity. The cover also includes a cover plate 9 set on the insert 7. The rotor core 1 has a groove 10 for the cover plate 9 to be inserted. The cover plate 9 has several grooves 11. After the insert 7 is installed into the mounting groove 6, the cover plate 9 will be inserted into the groove 10. When it is necessary to remove the rotating shaft 2 from the rotor core 1, a tool can be inserted into the groove 11 to screw it, making it easy to screw the insert 7 out of the mounting groove 6. The groove 11 provides a force point for the screwing operation, making the operation easier and less strenuous.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A rotor structure of a series-wound motor, comprising a rotor core (1) and a shaft (2), wherein a shaft hole (3) is provided at the center of the rotor core (1), characterized in that: The shaft hole (3) has several slots (4) on its side wall. The shaft (2) has several blocks (5) on its side wall for inserting into the slots (4). The rotor core (1) has an installation groove (6) that communicates with the shaft hole (3). A cover is detachably connected to the installation groove (6). The cover is used to abut against the blocks (5) so that the blocks (5) are fixed inside the slots (4).

2. The rotor structure of the series-wound motor according to claim 1, characterized in that: The cover includes an insert (7), the side wall of which is provided with an external thread structure, and the side wall of the mounting groove (6) is provided with an internal thread structure that matches the external thread structure.

3. The rotor structure of the series-wound motor according to claim 1, characterized in that: An elastic block (8) is provided on the inner bottom wall of the slot (4), and the total height of the elastic block (8) and the card block (5) is greater than the groove depth of the slot (4).

4. The rotor structure of the series-wound motor according to claim 3, characterized in that: The elastic block (8) is made of rubber material.

5. The rotor structure of the series-wound motor according to claim 2, characterized in that: The cover also includes a cover plate (9) disposed on the insert (7), and the rotor core (1) is provided with a groove (10) for the cover plate (9) to be inserted, and the cover plate (9) is provided with a plurality of grooves (11).

6. The rotor structure of the series-wound motor according to claim 1, characterized in that: The rotating shaft (2) is made of stainless steel.

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