CN217087653U

CN217087653U - Motor casing and motor

Info

Publication number: CN217087653U
Application number: CN202220694939.2U
Authority: CN
Inventors: 朱波
Original assignee: Suzhou Xingbo Power Technology Co ltd
Current assignee: Suzhou Xingbo Power Technology Co ltd
Priority date: 2021-11-26
Filing date: 2021-11-26
Publication date: 2022-07-29
Anticipated expiration: 2031-11-26
Also published as: CN216599240U

Abstract

The application relates to the technical field of motor part manufacturing, and discloses a motor shell and a motor. A motor housing comprising: the cooling device comprises a plastic shell and a metal inner water jacket arranged in the plastic shell, wherein a cooling liquid working cavity is arranged between the metal inner water jacket and the plastic shell. The motor comprises the motor shell. This kind of mode that this application adopted metal and plastics to combine has alleviateed shell weight greatly for original metal casing, on having guaranteed shell protection motor, having carried out radiating basis to the motor, and the preparation of plastic casing is simpler, efficiency is higher, the cost is lower than in metal preparation technology, and carbon emission and pollution are still less in the manufacturing process. The weight of the housing is reduced, so that the whole weight of the motor provided with the housing can be reduced.

Description

Motor casing and motor

The application is a divisional application, the application date of the original application is 26/11/2021, and the application number is 202122925771.X, which is named as a motor shell and a motor.

Technical Field

The utility model relates to a motor parts makes technical field, particularly, relates to a motor casing and motor.

Background

The existing electric power assembly, especially the shell of the automobile motor, is mainly made of cast aluminum material such as ADC12 or a356, and although the shell made of these materials has the characteristic of light weight, how to further reduce the weight of the shell to achieve the purpose of further reducing the load of the motor is still the current exploration direction.

In addition, in the production process of the cast aluminum shell, the pollution and energy consumption of a casting factory are huge, and in the later processing process, the metal cutting process is complex, and the sewage discharge is also large. Therefore, in recent years, the national controls the casting production capacity strictly, and new manufacturers have difficulty in approval.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a motor casing and motor aims at improving at least one kind of problem that mentions in the background art.

The embodiment of the utility model is realized like this:

in a first aspect, the present invention provides a motor housing, comprising: the cooling device comprises a plastic shell and a metal inner water jacket arranged in the plastic shell, wherein a cooling liquid working cavity is arranged between the metal inner water jacket and the plastic shell.

In an optional embodiment, the cooling liquid working cavity is distributed between the metal inner water jacket and the plastic shell in a winding manner, a liquid inlet and a liquid outlet are arranged on the plastic shell, the liquid inlet is communicated with the head end of the cooling liquid working cavity, and the liquid outlet is communicated with the tail end of the cooling liquid working cavity.

In an alternative embodiment, the coolant working chambers are helically distributed between the metal inner water jacket and the plastic outer shell.

In an alternative embodiment, the plastic outer shell has a mounting end opening for the metal inner water jacket to be mounted in, a first flange is arranged on the edge of the plastic outer shell corresponding to the mounting end opening, a second flange is arranged on one end of the metal inner water jacket close to the first flange, and the second flange is lapped on the first flange.

In an alternative embodiment, the first flange is provided with a plurality of metal bolt seats along the circumferential direction, the second flange is provided with a plurality of first screw holes along the circumferential direction, the positions of the plurality of first screw holes correspond to the positions of the plurality of metal bolt seats in a one-to-one manner, and the first flange and the second flange are connected by screwing bolts into the corresponding metal bolt seats through the first screw holes; the metal bolt seat is embedded into the first flange in the molding process of the plastic shell in an insert injection molding mode.

In an optional embodiment, the motor casing further includes a water jacket pad, a gap between an inner wall of the plastic casing and an outer wall of the metal inner water jacket is a cooling liquid working cavity, the plastic casing has an assembling end opening for the metal inner water jacket to be assembled into, the water jacket pad is disposed at the assembling end opening to close the cooling liquid working cavity, the water jacket pad is provided with a liquid inlet communicated with the cooling liquid working cavity, and a liquid outlet communicated with the cooling liquid working cavity is disposed at a position, far away from the liquid inlet, of the water jacket pad.

In an alternative embodiment, the edge of the plastic shell corresponding to the opening of the assembling end is provided with a connecting flange for mounting the motor shell on the motor, the connecting flange is provided with a plurality of annularly distributed metal bolt seats, the water jacket pad is provided with second screw holes in one-to-one correspondence with the plurality of metal bolt seats, the connecting flange and the water jacket pad are connected by screwing bolts into the corresponding metal bolt seats through the second screw holes, and the metal bolt seats are embedded into the connecting flange in the plastic shell molding process in an insert injection molding mode.

In an alternative embodiment, the material of the metal inner water jacket is aluminum alloy.

In an alternative embodiment, the plastic housing is a PPA housing, a PPS housing, a PEI housing, a PEEK housing, or a TORLON housing.

In a second aspect, the present invention provides an electric machine comprising a machine housing according to any one of the preceding embodiments.

The embodiment of the utility model provides a beneficial effect is:

this kind of mode that this application adopted metal and plastics to combine has alleviateed shell weight greatly for original metal casing, on having guaranteed shell protection motor, having carried out radiating basis to the motor, and the preparation of plastic casing is simpler, efficiency is higher, the cost is lower than in metal preparation technology, and carbon emission and pollution are still less in the manufacturing process. Because the weight of the shell is reduced, the whole weight of the motor for installing the shell can be reduced, the weight of a carrying mechanism taking the motor as power can be further reduced, the whole energy consumption is reduced, the cruising ability of the carrying mechanism is improved, and the motor can be widely applied to various fields with high requirements on weight, including electric vehicle motors, portable generators, aerial unmanned aerial vehicles, walking robots and the like. To plastic materials probably appear the problem that intensity reduces under the high temperature, in the design of this application, because have the coolant liquid working chamber between plastic casing and the metal water jacket, during the use, the accessible is regulated and control the coolant liquid velocity of flow, ensures that the temperature of plastic casing is stable below the degree centigrade, avoids the influence of high temperature to plastic casing intensity.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a structural view of a motor housing according to a first embodiment of the present invention;

fig. 2 is an exploded view of a first embodiment motor housing of the present invention;

fig. 3 is a structural view of a motor housing without a water jacket pad according to a second embodiment of the present invention;

fig. 4 is a schematic structural view of a motor housing according to a second embodiment of the present invention;

fig. 5 is an exploded view of a motor housing according to a second embodiment of the present invention.

100-motor shell; 110-a plastic housing; 111-assembly end opening; 112-a first flange; 113-metal bolt seat; 114-a connecting flange; 121-liquid inlet; 122-a liquid outlet; 130-metal inner water jacket; 131-a coolant working chamber; 132-a second flange; 133-a first screw hole; 140-water cushion; 143-second screw hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

First embodiment

Referring to fig. 1 and 2, an embodiment of the present application provides a motor housing 100, including: the cooling device comprises a plastic outer shell 110 and a metal inner water jacket 130 arranged in the plastic outer shell 110, wherein a cooling liquid working cavity 131 is arranged between the metal inner water jacket 130 and the plastic outer shell 110.

This application adopts plastics and metal to combine together in order to replace original scheme as motor housing with the alloy, water jacket 130 is located plastic housing 110 in the metal, set up coolant liquid working chamber 131 between the two, install the motor casing 100 that this application provided back on the motor, let in the coolant liquid working chamber 131, water jacket 130 and motor body contact in the metal, utilize the good heat conductivity of metal, take away the heat that the motor produced through coolant liquid (cooling water or cooling oil), good heat conductivity has been played. This kind of mode that this application adopted metal and plastics to combine has alleviateed shell weight greatly for original metal casing, on having guaranteed shell protection motor, having carried out radiating basis to the motor, and the preparation of plastic casing 110 is compared in metal preparation technology simpler, efficiency is higher, the cost is lower, carbon emission and pollution are still less in the manufacturing process. Because the weight of the shell is reduced, the whole weight of the motor for installing the shell can be reduced, the weight of a carrying mechanism taking the motor as power can be further reduced, the whole energy consumption is reduced, the cruising ability of the carrying mechanism is improved, and the motor can be widely applied to various fields with high requirements on weight, including electric vehicle motors, portable generators, aerial unmanned aerial vehicles, walking robots and the like. Aiming at the problem that the strength of a plastic material is reduced at high temperature, in the design of the application, because the cooling liquid working cavity 131 is arranged between the plastic shell 110 and the metal inner water jacket 130, the temperature of the plastic shell is ensured to be stabilized below 130 ℃ by regulating and controlling the flow rate of the cooling liquid during use, and the influence of high temperature on the strength of the plastic shell is avoided.

Preferably, the material of the metal inner water jacket 130 is aluminum alloy, which has light weight and good thermal conductivity.

Preferably, the plastic housing is a PPA (polyphthalamide) housing, a PPS (polyphenylene sulfide) housing, a PEI (polyetherimide) housing, a PEEK (polyetheretherketone) housing, a TORLON (polyamide-imide) housing, or a housing made of a mixture of these materials. The plastic made of the materials has the characteristics of high strength and light weight.

Furthermore, the speed shell can also be a modified plastic shell which is made of modifying agents such as glass fiber, mineral powder or carbon fiber and has high strength, high temperature resistance, wear resistance and engine oil resistance and is prepared at a modifying speed.

Further, the cooling liquid working cavity 131 is distributed between the metal inner water jacket 130 and the plastic housing 110 in a winding manner, the plastic housing 110 is provided with a liquid inlet 121 and a liquid outlet 122, the liquid inlet 121 is communicated with the head end of the cooling liquid working cavity 131, and the liquid outlet 122 is communicated with the tail end of the cooling liquid working cavity 131.

After entering the cooling liquid working chamber 131 from the liquid inlet 121, the cooling liquid flows along the distribution track of the cooling liquid working chamber 131, receives the heat from the motor body during the process, and the temperature rises, and finally flows out from the liquid outlet 122.

Further, the coolant working chambers 131 are spirally distributed between the metal inner water jacket 130 and the plastic outer shell 110.

Specifically, the coolant working chamber 131 is surrounded by a spiral groove body formed around the outer wall of the metal inner water jacket 130 and the inner wall of the plastic outer shell 110.

Further, the plastic outer shell 110 has a fitting end opening 111 into which the metal inner water jacket 130 is fitted, the plastic outer shell 110 is provided with a first flange 112 corresponding to an edge of the fitting end opening 111, one end of the metal inner water jacket 130 close to the first flange 112 is provided with a second flange 132, and the second flange 132 is lapped on the first flange 112.

The plastic outer shell 110 and the metal inner water jacket 130 are connected through flanges, and the gap between the plastic outer shell 110 and the metal inner water jacket 130 at the ends is closed by overlapping the second flange 132 on the second flange 132.

Further, the first flange 112 is provided with a plurality of metal bolt seats 113 along the circumferential direction thereof, the second flange 132 is provided with a plurality of first screw holes 133 along the circumferential direction thereof, the positions of the plurality of first screw holes 133 correspond to the positions of the plurality of metal bolt seats 113 one by one, the first flange 112 and the second flange 132 are connected by screwing bolts into the corresponding metal bolt seats 113 through the screw holes, and the metal bolt seats 113 are embedded on the first flange 112 in the molding process of the plastic housing 110 by an insert injection molding mode.

Because the metal bolt is difficult to stably and firmly screwed on the plastic shell, the metal bolt seat 113 is adopted and is arranged on the first flange 112 in an insert injection molding mode, so that the stress is dispersed, and the plastic cracking and deformation are avoided. Since plastic materials expand more than metal and therefore tend to expand more than metal after heating, the expansion can cause leakage and motor failure due to the flow of cooling water between the cylinder and the plastic housing. The metal bolt seat 113 is used for insert injection molding, and the mode of pressure sealing by using bolts is used for avoiding the problems.

The plastic housing 110 is formed by injection molding or 3D printing, and the metal inner water jacket 130 can be formed by die casting or extrusion, or can be formed by metal 3D printing. After the machining is completed, the metal inner water jacket 130 is inserted into the plastic outer shell 110, and the bolt tightening manner ensures the sealing. And finally, if necessary, processing and leveling the flange surface of the shell to ensure that the flatness meets the installation requirement.

The specific design of this embodiment is closed water jacket motor casing, adopts metal inner chamber flange overlap joint on plastics shell flange, fixes the metal inner chamber by bolt location and packing force, and this design is often seen in electric drive assembly design.

Second embodiment

The implementation principle of this embodiment is basically the same as that of the first embodiment, and reference is made to the contents of the first embodiment where nothing is mentioned.

As shown in fig. 3 to 5, the motor housing 100 of the present embodiment further includes a water jacket pad 140, a gap between an inner wall of the plastic housing 110 and an outer wall of the metal inner water jacket 130 is a coolant working cavity 131, the plastic housing 110 has an assembling end opening 111 for the metal inner water jacket 130 to be assembled into, the water jacket pad 140 is disposed at the assembling end opening 111 to close the coolant working cavity 131, the water jacket pad 140 is provided with a liquid inlet 121 communicated with the coolant working cavity 131, and a liquid outlet 122 communicated with the coolant working cavity 131 is disposed on the water jacket pad 140 at a position away from the liquid inlet 121.

The cooling liquid enters the cooling liquid working cavity 131 from the liquid inlet 121, and is discharged from the cooling liquid outlet after being heated. The water jacket pad 140 can play a role of a sealing pad to prevent leakage of cooling liquid, and the arrangement of the liquid inlet 121 and the liquid outlet 122 on the water jacket pad 140 enables the water jacket pad 140 to play a role of water path diversion.

Specifically, the plastic housing 110 is provided with a connecting flange 114 corresponding to the edge of the mounting end opening 111 for mounting the motor housing on the motor, the connecting flange 114 is provided with a plurality of annularly distributed metal bolt seats 113, and the water jacket pad 140 is provided with second screw holes 143 corresponding to the plurality of metal bolt seats 113 one to one. The connection of the connection flange 114 and the water jacket gasket 140 is achieved by screwing bolts into the corresponding metal bolt seats 113 through the second bolt holes 143. The metal bolt seats 113 are made of metal, and the metal bolt seats 113 are embedded into the connecting flange 114 in the molding process of the plastic housing 110 in an insert injection molding mode.

The specific design of this embodiment is open water jacket motor casing, often in the motor casing of increasing journey and thoughtlessly moving the structure, adopts in the metal inner chamber directly imbeds plastic housing, but adopts the direct injection moulding of inserts injection moulding process. The cooling liquid working cavity and the cooling water of the motor body can share a cooling water path.

In conclusion, the motor shell 100 provided by the application adopts the metal inner water jacket 130 and the plastic shell 110 to be combined, the main structure of the motor shell 100 is made of plastic materials and can be formed through an injection molding process or a 3D printing production mode, the production process cost and energy consumption are greatly reduced, meanwhile, the weight is greatly reduced, compared with the original cast aluminum alloy shell, the weight is reduced by 40-50%, the weight of a power assembly is effectively reduced, thereby contributing to the weight reduction of an electric vehicle, improving the endurance of the electric vehicle and reducing the carbon emission.

The embodiment of the application also provides a motor, which comprises the motor shell provided by the embodiment of the application. The motor comprises the motor shell provided by the embodiment of the application, so that the overall weight of the motor is lighter than that of the existing motor.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electric machine housing, comprising: the cooling device comprises a plastic shell and a metal inner water jacket arranged in the plastic shell, wherein a cooling liquid working cavity is arranged between the metal inner water jacket and the plastic shell; the motor casing still includes water jacket pad, the inner wall of plastic housing with clearance between the outer wall of water jacket in the metal does the coolant liquid working chamber, plastic housing has the confession water jacket assembles the assembly end opening that gets into in the metal, water jacket pad set up in assembly end opening part makes the coolant liquid working chamber seals, water jacket pad be provided with the inlet of coolant liquid working chamber intercommunication, keep away from on the water jacket pad the position of inlet be provided with the liquid outlet of coolant liquid working chamber intercommunication.

2. The motor housing according to claim 1, wherein a connecting flange is provided at an edge of the plastic housing corresponding to the opening of the assembling end, the connecting flange is provided with a plurality of annularly distributed metal bolt seats, the water jacket pad is provided with second screw holes corresponding to the plurality of metal bolt seats in a one-to-one manner, the connecting flange and the water jacket pad are connected by screwing bolts into the corresponding metal bolt seats through the second screw holes, and the metal bolt seats are embedded in the connecting flange during the molding process of the plastic housing by insert injection.

3. The motor housing according to claim 1 or 2, wherein the metal inner water jacket is made of an aluminum alloy.

4. The motor housing of claim 1, wherein the plastic housing is a PPA, PPS, PEI, PEEK, or TORLON housing.

5. An electric machine comprising a machine housing according to any one of claims 1 to 4.