CN218015626U

CN218015626U - Realize lightweight new forms of energy motor casing and casting mould thereof

Info

Publication number: CN218015626U
Application number: CN202221710562.1U
Authority: CN
Inventors: 吴凌剑; 魏俭瑊; 吴凌锋; 陶彦博; 王晓红
Original assignee: Zhejiang Mingdao Thermal Energy Technology Co ltd
Current assignee: Zhejiang Mingdao Thermal Energy Technology Co ltd
Priority date: 2022-07-01
Filing date: 2022-07-01
Publication date: 2022-12-13
Anticipated expiration: 2032-07-01

Abstract

The utility model discloses a realize lightweight new forms of energy motor casing and casting mould thereof belongs to new energy automobile motor casing mould technical field. The casting mould comprises a motor shell upper mould and a hub type motor shell bottom mould, and an internal circulating water channel is formed between the upper mould and the hub type motor shell bottom mould; the bottom die of the hub type motor shell is provided with a first cavity, and a third cross gate communicated with the first cavity is circumferentially arranged; the upper die of the motor shell is provided with a second cavity, a second cross gate communicated with the second cavity is circumferentially arranged, and the second cross gate is communicated with a third cross gate through a plurality of inner gates; the second horizontal pouring channel is also sequentially connected with a first horizontal pouring channel and a straight pouring channel for filling liquid. The utility model discloses gained foundry goods surface quality is better, and cooling water course length must have great extension than the tradition to can effectual improvement cooling efficiency.

Description

Realize lightweight new forms of energy motor casing and casting mould thereof

Technical Field

The utility model belongs to the technical field of new energy automobile motor casing mould, specifically relate to a realize lightweight new energy motor casing and casting mould thereof.

Background

With the rapid development of the new energy automobile industry, the demand on aluminum alloy hub motors is increased rapidly, each hub company also pursues yield and light weight more and more, and simultaneously needs to meet mass production conditions, and the requirements on light weight, small installation space, high specific power and efficiency and overall cost optimization of the motors are also increased rapidly. At present, the power density of the hub motor needs to be greatly improved, because the torque density of the motor is high, the motor can output higher power at the same rotating speed. Under the same torque/power, the axial magnetic field motor has larger torque density/power density, so the volume and weight of the motor are smaller. Compared with other motors, the axial flux motor is generally in a flat disc shape, and as shown in fig. 1, a common permanent magnet motor has an axial dimension of 200mm and a weight of 20Kg; the axial size of the hub motor is 87.5mm, and the weight is 11Kg; the axial size of the three-phase asynchronous motor is 370mm, and the weight is 40Kg. Therefore, the integrated design of the motor becomes a hot spot, wherein the motor shell is a large key part for a new energy machine type, the geometric structure of the part is complex, the shell wall is internally provided with a circulating water chamber, and the circulating water chamber can be directly formed during casting and simultaneously requires good mechanical property and air tightness. Because the casting structure of the motor shell is complex, the gravity casting technology is mostly adopted for casting the motor shell. The aluminum alloy shell cast by adopting the gravity casting process has high dimensional precision, good surface smoothness and small processing amount, so that the production cost is reduced while the metal utilization rate is improved, the product price is low, the enterprise competitiveness is improved, and economic benefits are brought to people. However, the gravity casting process often produces castings due to improper alloy liquid introducing positions or improper solidification sequence, shrinkage cavities or shrinkage porosity are generated, and the product quality is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the defect among the prior art to a realize lightweight new forms of energy motor casing and casting mould thereof is provided.

The utility model discloses the concrete technical scheme who adopts as follows:

in a first aspect, the utility model provides a casting mould for realizing a lightweight new energy motor shell, which comprises a motor shell upper part mould and a hub type motor shell bottom mould, wherein the upper part mould and the lower part mould are fixedly connected with each other, and the middle parts of the upper part mould and the bottom mould jointly form an internal circulating water channel with a water inlet hole and a water outlet hole;

the bottom die of the hub type motor shell is provided with a first cavity, and a third cross gate communicated with the first cavity is circumferentially arranged; the upper die of the motor shell is provided with a second cavity, a second cross gate communicated with the second cavity is circumferentially arranged, and the second cross gate is communicated with the third cross gate through a plurality of ingates; the second horizontal pouring channel is also sequentially connected with a first horizontal pouring channel and a straight pouring channel for filling liquid; the sprue, the first cross gate, the plurality of ingates, the second cross gate and the third cross gate form a pouring channel together.

Preferably, the hub type motor shell bottom mould is a wheel type convex structure with a hub, a spoke and a rim.

Preferably, the internal circulating water passage has a folded circumferential matrix structure.

Preferably, the third runner is located inside the second runner, and both are in a horizontal annular structure and are coaxially arranged.

Further, a first ingate, a second ingate, a third ingate, a fourth ingate and a fifth ingate are uniformly distributed on the inner side of the second cross gate; and one end of each ingate is communicated with the second horizontal pouring channel, and the other end of each ingate is communicated with the outer side of the third horizontal pouring channel.

Furthermore, the first cross gate is of a horizontally arranged straight pipe-shaped structure, one end of the first cross gate is connected with the outer side of the second cross gate, and the other end of the first cross gate is provided with a vertical pipe-shaped straight gate.

Preferably, one end of the straight pouring channel is communicated with the first cross pouring channel, and the other end of the straight pouring channel is provided with a pouring cup.

Preferably, a plurality of risers are convexly arranged at the hot section at the outer side of the mould at the upper part of the motor shell.

Further, a chill is arranged on a bottom mold of the hub type motor shell far away from the riser and the sprue.

In a second aspect, the utility model provides an utilize the first aspect arbitrary casting mould pouring obtains realization lightweight new forms of energy motor casing.

Compared with the prior art, the utility model, following beneficial effect has:

the utility model discloses a casting mould can improve the cooling efficiency of foundry goods, has realized the order and has solidified, and the solidification at hot node position reduces the production of its shrinkage porosity and shrinkage cavity with higher speed, improves the mechanical properties at cooling position, improves the foundry goods quality, improves cooling efficiency, prevents or has alleviateed because the deformation that the cooling temperature difference leads to has reduced defects such as shrinkage cavity shrinkage porosity, has greatly promoted the quality and the qualification rate of product. The utility model discloses gained foundry goods surface quality is better, and cooling water course length must have great extension than the tradition to can effectual improvement cooling efficiency.

Drawings

FIG. 1 shows a comparison of a conventional permanent magnet motor (a), a motor (b) of a disc hub company and a three-phase asynchronous motor (c) under the same output parameter of 5.5 kW;

fig. 2 is a first angle structure diagram of the casting mold.

Fig. 3 is a second angle configuration diagram of the casting mold.

Fig. 4 is a schematic view of a divided structure of the casting mold.

FIG. 5 is a flow chart of the casting process.

Fig. 6 is a schematic structural view of a motor housing for realizing lightweight new energy.

In the figure: 1-chilling iron; 2-a first riser; 3-a second riser; 4-a third riser; 5-a first cross gate; 6-fourth riser; 7-straight pouring channel; 8-fifth riser; 9-a pouring cup; 10-a first ingate; 11-second cross runner; 12-second ingate; 13-third ingate; 14-third runner; 15-fourth ingate; 16-fifth ingate; 17-motor housing upper part mould; 18-internal circulation water channel; 19-a bottom mold of a hub motor shell.

Detailed Description

The invention will be further elucidated and described with reference to the drawings and embodiments. The utility model discloses in each embodiment's technical characteristics under the prerequisite that does not conflict each other, all can carry out corresponding combination.

As shown in fig. 2 to 4, for the utility model provides a casting mold for realizing lightweight new energy motor shell, the casting mold mainly comprises a motor shell upper mold 17 and a hub type motor shell bottom mold 19, which are fixedly connected from top to bottom. The middle part between the upper mould 17 of the motor shell and the bottom mould 19 of the hub type motor shell jointly forms an internal circulating water channel 18, and the internal circulating water channel 18 is provided with a water inlet hole and a water outlet hole. In the present embodiment, the hub motor housing bottom mold 19 is a wheel type convex structure having a wheel hub, a spoke and a wheel rim, and the motor housing upper mold 17 is a motor housing structure matched with the hub motor housing bottom mold 19.

As shown in fig. 4, the internal circulation water channel 18 is a folded circumferential matrix structure, and although the internal circulation water channel 18 is illustrated in the drawing, the structure is enclosed by attaching and fixing the upper mold 17 of the motor housing and the bottom mold 19 of the hub type motor housing up and down, and is not a separate component.

In the casting mold, a bottom mold 19 of the hub type motor casing has a first cavity, and a third runner 14 communicated with the first cavity is arranged on the outer periphery of the first cavity. The upper die 17 of the motor shell is provided with a second cavity, a second cross runner 11 communicated with the second cavity is arranged on the outer circumference of the second cavity, and the second cross runner 11 is communicated with a third cross runner 14 through a plurality of inner runners. The second runner 11 is also connected in sequence with a first runner 5 and a sprue 7 for pouring liquid. That is, the sprue 7, the first runner 5, the plurality of ingates, the second runner 11, and the third runner 14 together form a pouring passage in this order.

In this embodiment, the third runner 14 is located inside the second runner 11, and both are coaxially arranged, and the third runner 14 and the second runner 11 are both horizontal ring-shaped structures. The ingates can be five, namely, a first ingate 10, a second ingate 12, a third ingate 13, a fourth ingate 15 and a fifth ingate 16 are uniformly distributed at the inner side of the second cross pouring channel 11. All the ingates communicate at one end with the second runner 11 and at the other end with the outside of the third runner 14. The first horizontal pouring channel 5 is a horizontally arranged straight tube structure, one end of the first horizontal pouring channel is connected with the outer side of the second horizontal pouring channel 11, and the other end of the first horizontal pouring channel is provided with a vertical tubular straight pouring channel 7. One end of the sprue 7 is communicated with the first cross gate 5, and the other end is provided with a pouring cup 9. In this configuration, in the actual pouring process, the pouring liquid is poured from the pouring cup 9 and then flows through the sprue 7, the first runner 5 and the second runner 11 in this order, and the pouring liquid enters the third runner 14 in the second runner 11 through the first ingate 10, the second ingate 12, the third ingate 13, the fourth ingate 15 and the fifth ingate 16.

In the casting mould, a plurality of risers are convexly arranged at thick thermal junctions on the outer side of the mould 17 on the upper part of the motor shell, and the risers are arranged at positions where necking is easy to generate. In the present embodiment, there are five risers in total, namely a first riser 2, a second riser 3, a third riser 4, a fourth riser 6 and a fifth riser 8. A chill 1 is provided on the hub motor housing bottom mold 19 remote from the risers and sprue 7 to facilitate sequential solidification. The utility model discloses the rising head is settled to the great hot section department of inscribe circle diameter on foundry goods upper portion, keeps away from the rising head department simultaneously in the bottom and settles the chill and add the local cooling rate of block casting for the foundry goods is kept away from the local elder generation of rising head and sprue when the casting and is solidified, is close to the local postcoagulation of rising head, and the rising head solidifies at last, so has just realized the order and has solidified. The shrinkage porosity and shrinkage cavity of the first solidified part of the casting are fed by the aluminum alloy liquid of the second solidified part by sequential solidification, then the shrinkage porosity and shrinkage cavity of the second solidified part are fed by the aluminum alloy liquid in the riser, and the shrinkage porosity and shrinkage cavity are transferred to the riser, so that a compact motor shell casting without shrinkage cavity can be obtained, and the requirement of a circulating water chamber in the shell on compactness is met.

As shown in fig. 5, in the actual pouring process, the upper mold 17 of the motor housing and the bottom mold 19 of the hub motor housing are first closed, the pouring liquid (e.g. aluminum alloy liquid) is poured from the pouring cup 9, and then flows into the second runner 11 at the bottom through the sprue 7 and the first runner 5 in sequence, and the pouring liquid then flows uniformly to the third runner 14 through the first ingate 10, the second ingate 12, the third ingate 13, the fourth ingate 15 and the fifth ingate 16 in the second runner 11, so that the bottom wheel structure is uniformly heated while the fluidity of the aluminum alloy liquid is improved, and the generation of thermal stress is reduced. The aluminum alloy liquid is gradually filled upwards, so that gas is discharged from a riser above, the whole filling process is stable and uniform, and splashing and iron beans are not generated in the cavity. When casting, the casting is firstly solidified at a position far away from a riser and a sprue, then solidified at a position close to the riser, and finally solidified, and the sequential solidification enables the shrinkage of the firstly solidified part of the casting to be supplied by the aluminum alloy liquid of the later solidified part, then the shrinkage of the solidified part is supplied by the aluminum alloy liquid in the riser, and the shrinkage cavity is transferred to the riser. And finally, drawing out the sand core, cutting off a dead head and removing the chill. So just can obtain the fine and close motor casing foundry goods of no shrinkage cavity, as shown in fig. 6, the utility model discloses the gained foundry goods has satisfied the requirement of casing internal circulating water chamber to the density.

The above embodiments are merely preferred embodiments of the present invention, but not intended to limit the present invention. Various changes and modifications can be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, all the technical schemes obtained by adopting the mode of equivalent replacement or equivalent transformation fall within the protection scope of the utility model.

Claims

1. A casting mould for realizing a light new energy motor shell is characterized by comprising a motor shell upper mould (17) and a hub type motor shell bottom mould (19), wherein the motor shell upper mould and the hub type motor shell bottom mould are vertically and fixedly connected, and the middle parts of the motor shell upper mould and the hub type motor shell bottom mould form an internal circulating water channel (18) with a water inlet hole and a water outlet hole;

the bottom die (19) of the hub type motor shell is provided with a first cavity, and a third cross runner (14) communicated with the first cavity is circumferentially arranged; the upper die (17) of the motor shell is provided with a second cavity, a second cross gate (11) communicated with the second cavity is circumferentially arranged, and the second cross gate (11) is communicated with the third cross gate (14) through a plurality of ingates; the second horizontal pouring channel (11) is also sequentially connected with a first horizontal pouring channel (5) and a straight pouring channel (7) for filling liquid; the sprue (7), the first cross gate (5), the plurality of ingates, the second cross gate (11) and the third cross gate (14) form a pouring channel together.

2. The casting mold for realizing the light new energy motor shell according to claim 1, wherein the hub type motor shell bottom mold (19) is a wheel type convex structure having a hub, a spoke and a rim.

3. The casting mold for realizing the light-weight new energy motor housing according to claim 1, wherein the internal circulation water channel (18) has an accordion-shaped circumferential matrix structure.

4. The casting mold for realizing the light-weight new energy motor shell according to claim 1, wherein the third runner (14) is located inside the second runner (11), and both are of a horizontal ring structure and are coaxially arranged.

5. The casting mold for realizing the light-weight new energy motor shell according to claim 4, wherein a first ingate (10), a second ingate (12), a third ingate (13), a fourth ingate (15) and a fifth ingate (16) are uniformly distributed on the inner side of the second cross gate (11); one end of each ingate is communicated with the second horizontal pouring channel (11), and the other end of each ingate is communicated with the outer side of the third horizontal pouring channel (14).

6. The casting mold for realizing the light weight new energy motor shell according to claim 4, characterized in that the first horizontal runner (5) is a horizontally arranged straight pipe structure, one end of the first horizontal runner is connected with the outer side of the second horizontal runner (11), and the other end of the first horizontal runner is provided with a vertical pipe-shaped straight runner (7).

7. The casting mold for realizing the light-weight new energy motor shell according to claim 1, wherein one end of the sprue (7) is communicated with the first runner (5), and the other end is provided with a sprue cup (9).

8. The casting mold for realizing the light new energy motor shell according to claim 1, wherein a plurality of risers are convexly arranged at the thermal junctions on the outer side of the motor shell upper mold (17).

9. The casting mold for realizing the light new energy motor shell according to claim 8, wherein a chill (1) is arranged on a hub motor shell bottom mold (19) far away from the riser and the sprue (7).

10. A motor housing for a new energy source, which is lightweight and is obtained by casting using the casting mold according to any one of claims 1 to 9.