Die-casting base for motor iron core

Abstract

The utility model discloses a motor iron core die-casting base, which belongs to the field of motor manufacture and comprises an end face, the end face is provided with a boss, an abutting hole and a cavity, the cavity is used for forming the bottom of a cavity and surrounds the boss, the abutting hole is arranged in the cavity, the axial direction of the abutting hole is perpendicular to the plane where the end face is located, and the end face is further provided with a waste runner. A flange is formed between the waste runner and the cavity, the flange is provided with a plurality of overflow ports, each overflow port is communicated with the waste runner and the cavity, the base at the bottom of the cavity is provided with the waste runner communicated with the cavity, during die casting, air at the bottom of the cavity can be discharged from the waste runner, gaps in an end ring at the bottom of a rotor are avoided, and the motor quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of motor manufacturing, in particular to a die-casting base for a motor iron core. Background Art

[0002] During the manufacturing process of a squirrel-cage rotor, it is necessary to discharge the air in the cavity. Therefore, during casting, an exhaust channel structure needs to be set up. In the prior art, the base forming the bottom of the cavity only has a chamber for forming the cavity, and the exhaust at the bottom of the cavity cannot be realized, resulting in gaps in the bottom end ring and affecting the motor efficiency. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the prior art, one of the purposes of the utility model is to provide a die-casting base for a motor iron core that can realize exhaust at the bottom of the cavity.

[0004] One of the purposes of the utility model is realized by adopting the following technical scheme:

[0005] The die-casting base for the motor iron core includes an end face, and the end face is provided with a boss, a pressing hole and a chamber. The chamber is used for forming the bottom of the cavity. The chamber surrounds the boss. The pressing hole is arranged in the chamber. The axial direction of the pressing hole is perpendicular to the plane where the end face is located. The end face is further provided with a waste material channel. A baffle is formed between the waste material channel and the chamber. The baffle is provided with a plurality of overflow ports. Each overflow port communicates the waste material channel with the chamber.

[0006] Further, the chamber is in an annular shape.

[0007] Further, the waste material channel is in an arc shape and surrounds the chamber.

[0008] Further, both ends of the waste material channel are discontinuously arranged.

[0009] Further, the end face is further provided with a material discharging hole. The material discharging hole is located in the waste material channel. The axial direction of the material discharging hole is perpendicular to the end face.

[0010] Further, the overflow port includes a first overflow part and a second overflow part. The first overflow part is located on the baffle and extends out from the chamber. The second overflow part extends from the first overflow part to the waste material channel. The first overflow part extends horizontally. The second overflow part is inclined.

[0011] Further, the horizontal height of the first overflow part is higher than the horizontal height of the bottom of the chamber.

[0012] Further, the overflow port further includes a connecting part. The connecting part is located at the edges of the first overflow part and the second overflow part. The connecting part is a curved surface structure.

[0013] Furthermore, the die-casting base of the motor iron core further includes a bottom and a main body. The main body is located between the bottom and the end face. The bottom, the main body, and the end face are integrally formed. A cooling flow channel is provided inside the main body.

[0014] Furthermore, the cooling flow channel surrounds the pressing hole.

[0015] Compared with the prior art, the die-casting base of the motor iron core of the present utility model includes an end face. The end face is provided with a boss, a pressing hole, and a chamber. The chamber is used to form the bottom of the cavity. The chamber surrounds the boss. The pressing hole is arranged inside the chamber. The axial direction of the pressing hole is perpendicular to the plane where the end face is located. The end face is further provided with a waste material flow channel. A baffle is formed between the waste material flow channel and the chamber. The baffle is provided with a plurality of overflow ports. Each overflow port communicates the waste material flow channel with the chamber. The base at the bottom of the cavity is provided with a waste material flow channel communicating with the chamber. During die-casting, the air at the bottom of the cavity can be discharged from the waste material flow channel, avoiding gaps inside the end ring at the bottom of the rotor and improving the quality of the motor. Description of the Drawings

[0016] Figure 1 is a perspective view of the die-casting base of the motor iron core of the present utility model;

[0017] Figure 2 is Figure 1 a perspective cross-sectional view of the die-casting base of the motor iron core;

[0018] Figure 3 is Figure 1 a partial structural schematic diagram of the die-casting base of the motor iron core;

[0019] Figure 4 is Figure 1 another perspective cross-sectional view of the die-casting base of the motor iron core;

[0020] Figure 5 is Figure 1 another perspective view of the die-casting base of the motor iron core;

[0021] Figure 6 is Figure 1 a perspective view of the usage state of the die-casting base of the motor iron core;

[0022] Figure 7 is Figure 1 another perspective view of the usage state of the die-casting base of the motor iron core.

[0023] In the figure: 10, bottom; 20, main body; 30, end face; 31, boss; 32, chamber; 33, retaining edge; 330, overflow port; 3301, first overflow part; 3302, second overflow part; 3303, connecting part; 34, waste runner; 40, pressing hole; 50, ejector hole; 60, cooling structure; 61, sealing plug; 62, cooling runner; 63, cooling channel; 100, iron core; 200, waste material. Detailed implementation manner

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there can also be another intermediate component through which it is fixed. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used herein in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0027] The die-casting base of the motor iron core is used to form a cavity during the manufacturing process of the squirrel-cage rotor, so that after the molten aluminum liquid fills the cavity, the rotor is formed through die-casting. During the process of filling the cavity with molten aluminum liquid, the air in the cavity needs to be discharged to avoid the formation of air pockets and gaps due to the presence of air. In the prior art, since the base only has a chamber for forming the cavity, it is impossible to discharge the air at the bottom of the cavity.

[0028] Please refer to Figures 1 to 7 , in this application, the die-casting base of the motor iron core includes a bottom 10, a main body 20 and an end face 30. The main body 20 is located between the bottom 10 and the end face 30, and the bottom 10, the main body 20 and the end face 30 are integrally formed. In this embodiment, the die-casting base of the motor iron core is generally cylindrical.

[0029] The end face 30 is provided with a chamber 32 and a waste material flow channel 34 communicating with the chamber 32. The chamber 32 serves as the bottom of the cavity. In this embodiment, the chamber 32 is annular and in the form of a groove structure. A boss 31 is formed inside the chamber 32. The boss 31 is located at the centroid of the end face 30 and is a cylindrical convex structure. A pressing hole 40 is provided in the chamber 32. The pressing hole 40 is vertically arranged and the axis of the pressing hole 40 is perpendicular to the end face 30. The number of the pressing holes 40 is multiple, and the multiple pressing holes 40 are evenly distributed in the chamber 32 and located on a circumference. The pressing hole 40 is used for a pressing rod to extend into the cavity to press the bottom of the iron core in the cavity and discharge air.

[0030] A baffle 33 is formed between the chamber 32 and the waste material flow channel 34. An overflow port 330 is provided on the baffle 33. The overflow port 330 communicates the chamber 32 with the waste material flow channel 34. Specifically, the overflow port 330 includes a first overflow part 3301, a second overflow part 3302 and a connecting part 3303. The first overflow part 3301 is located on the baffle 33 and extends out from the chamber 32. The second overflow part 3302 extends from the first overflow part 3301 to the waste material flow channel 34. The first overflow part 3301 extends horizontally, and the second overflow part 3302 is inclined. The connecting part 3303 is located at the edges of the first overflow part 3301 and the second overflow part 3302, and the connecting part 3303 is a curved surface structure. The number of the overflow ports 330 is multiple, and the multiple overflow ports 330 are evenly spaced on the baffle 33.

[0031] The waste material flow channel 34 is arc-shaped and surrounds the chamber 32. The two end parts of the waste material flow channel 34 are disconnected. A knockout hole 50 is provided in the waste material flow channel 34. The knockout hole 50 is vertically arranged, and the axis of the knockout hole 50 is perpendicular to the end face 30. The multiple knockout holes 50 are evenly distributed in the waste material flow channel 34. The knockout hole 50 is used for installing a knockout rod to eject the waste material in the waste material flow channel 34.

[0032] The die-casting base of the motor iron core is further provided with a cooling structure 60. The cooling structure 60 is arranged inside the main body 20. The cooling structure 60 includes a sealing plug 61, a cooling flow channel 62 and a cooling channel 63.

[0033] The number of the cooling flow channels 62 is multiple, and the multiple cooling flow channels 62 are located on the same plane and communicate with each other. Specifically, each cooling flow channel 62 is linear. One end of each cooling flow channel 62 is located on the outer wall of the main body 20, and the other end of each cooling flow channel 62 is located inside the main body 20. The sealing plug 61 is located near the outer wall of the cooling flow channel 62 for sealing. The cooling channel 63 is vertically arranged and communicates with the cooling flow channel 62. The number of the cooling channels 63 is two, and the two cooling channels 63 serve as the inlet and outlet of the coolant.

[0034] When using the die-cast base of the motor iron core, the molten aluminum liquid fills the chamber 32 to form the iron core 100. The excess aluminum liquid and air flow into the waste runner 34 from the overflow port 330 to form the waste 200. The pressing rod extends into the cavity to press against the bottom of the iron core in the cavity, further exhausting the air. The ejector rod extends into the ejector hole 50 to eject the waste in the waste runner 34.

[0035] In this application, the die-cast base of the motor iron core is provided with a waste runner 34 communicating with the chamber 32 at the bottom of the cavity. During die-casting, the air at the bottom of the cavity can be discharged from the waste runner 34, avoiding the existence of gaps in the bottom end ring of the rotor and improving the quality of the motor.

[0036] The above embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can be made. These are all equivalent modifications and evolutions based on the substantial technology of the present utility model to the above embodiments, and all belong to the protection scope of the present utility model.

Claims

1. The die-cast base of the motor core, including the end face, is characterized by: The end face is provided with a boss, a pressure hole and a cavity, the cavity is used to form the bottom of the cavity, the cavity surrounds the boss, the pressure hole is arranged in the cavity, the axial direction of the pressure hole is perpendicular to the plane where the end face is located, the end face is also provided with a waste flow channel, a rib is formed between the waste flow channel and the cavity, the rib is provided with a plurality of overflow ports, each of the overflow ports connects the waste flow channel and the cavity.

2. The motor core die-casting base according to claim 1, characterized in that: The chamber is in the shape of a circular ring.

3. The motor core die-casting base according to claim 1, characterized in that: The waste flow channel is in an arc shape and surrounds the chamber.

4. The motor core die-casting base according to claim 3, characterized in that: The two ends of the waste flow channel are disconnected.

5. The motor core die-casting base according to claim 1, characterized in that: The end surface is also provided with a material withdrawal hole, the material withdrawal hole is located in the waste material flow channel, and the axial direction of the material withdrawal hole is perpendicular to the end surface.

6. The motor core die-casting base according to claim 1, characterized in that: The overflow port includes a first overflow portion and a second overflow portion, the first overflow portion is located on the rib and extends out of the chamber, the second overflow portion extends from the first overflow portion to the waste flow channel, the first overflow portion extends horizontally, and the second overflow portion is inclined.

7. The motor core die-casting base according to claim 6, characterized in that: The level of the first overflow portion is higher than the level of the bottom of the chamber.

8. The motor core die-casting base according to claim 6, characterized in that: The overflow port further includes a connecting portion, the connecting portion is located at the edges of the first overflow portion and the second overflow portion, and the connecting portion is a curved surface structure.

9. The motor core die-casting base according to claim 1, characterized in that: The motor core die-casting base also includes a bottom and a main body, wherein the main body is located between the bottom and the end face, the bottom, the main body and the end face are integrally formed, and a cooling channel is provided inside the main body.

10. The motor core die-casting base according to claim 9, characterized in that: The cooling channel surrounds the pressing hole.

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