CN216436977U - Motor shaft for electric vehicle - Google Patents

Abstract

The utility model discloses a motor shaft for an electric vehicle, wherein a motor shaft and a stator assembly are installed into a whole, the stator assembly is positioned in a motor shell, a wire harness through channel and an air duct are respectively arranged in the motor shaft, the wire harness through channel and the air duct both extend from the outside of the motor shell to the inside of the motor shell, and the wire harness through channel and the air duct are not connected; the motor shell is provided with the wire harness through channel and the air duct structure, and the wire harness through channel and the air duct structure are arranged in the motor shaft respectively to achieve the effect of communicating the motor shell with high sealing requirements with the inside and the outside of the motor shell.

Description

Motor shaft for electric vehicle

Technical Field

The utility model belongs to the field of motor manufacturing, and particularly relates to a motor shaft for an electric vehicle.

Background

With the technical development of motor drive control technology, subject to harsh compact installation requirements, in the field of household electric tools and electric tools, motors and controllers are basically installed in an integrated manner, and because the working power of the motors in the field of household electric tools and electric tools is low, after the motors and the controllers are integrated, the heat dissipation problem is small, which also becomes a key factor for realizing the integrated integration of the motors and the controllers in the fields.

Specifically, for the field of electric vehicles, because the brushless permanent magnet synchronous motor has the advantages of compact structure, high power density and gradually improved technology, in the field of electric vehicles, a high-power brushless permanent magnet synchronous motor (the power is usually at least more than 200W, and much of the power is more than 500W-1 KW) is usually adopted as a driving motor of the electric vehicle, and because the control requirement of the brushless permanent magnet synchronous motor is high, the brushless permanent magnet synchronous motor is also called a technical threshold and a barrier for popularization and application of the permanent magnet synchronous motor. At present, the field of electric vehicles is that a controller manufacturer designs a controller through motor indexes provided by the whole electric vehicle manufacturer. Therefore, a controller manufacturer and a motor manufacturer become two independent product development systems, and are finally connected together through a large line of an electric vehicle whole factory, so that a driving system of an electric vehicle needs to be connected with more independent modules, the wiring harnesses are more, the whole wiring terminals are increased, the wiring is complex, the types of motor controllers are more, and standardization or series modularization cannot be formed.

The utility model discloses a utility model with publication number CN111082602A discloses a built-in control system's in-wheel motor, proposes to set up control system on stator module, and control system is connected with motor line set spare, cools off motor casing's inside through insulating coolant liquid, then is equipped with the breather pipe structure on setting up the grease proofing breather valve that has grease proofing ventilated membrane and the line set spare on through motor casing and realizes the pressure balance between motor casing inside and the outside. However, the oil-proof vent valve and the vent pipe adopted by the scheme are exposed outside, so that not only is the hidden danger of liquid leakage existed, but also the hidden danger is caused by the service life of the wire assembly, so that the quality hidden danger exists in the adopted heat dissipation scheme, and the applicant finds that after the motor for the electric vehicle is integrated with the controller thereof, the risk of electromagnetic interference still exists, and meanwhile, the problems of integrated control layout and the like of other function control modules of the electric vehicle, such as an anti-theft module, a vibration module and a DCDC power module, are solved.

Based on the research experience of the applicant in the field for years, and research and development teams with the motor and the controller respectively, a technical scheme is expected to be sought to realize the integrated integration of the motor and the controller in the field of electric vehicles.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a motor shaft for an electric vehicle, in which a wire harness through channel and an air duct structure are respectively disposed inside the motor shaft to achieve a communication effect between an inside and an outside of a motor casing with a high sealing requirement, and the motor shaft is particularly suitable for an application of an electric vehicle motor in which a cooling liquid is injected into the motor casing, and is beneficial to promoting an application process of integrating a motor and a controller in the field of electric vehicles.

The technical scheme of the utility model is as follows:

the motor shaft for the electric vehicle is characterized in that the motor shaft and the stator assembly are installed into a whole, the stator assembly is located inside a motor shell, a wire harness penetrating channel and an air duct are respectively arranged inside the motor shaft, the wire harness penetrating channel and the air duct both extend from the outside of the motor shell to the inside of the motor shell, and the wire harness penetrating channel and the air duct are not connected.

Preferably, the air duct is parallel to the motor shaft, so that the ventilation effect between the inside and the outside of the motor shell is facilitated; the wire harness penetrating passage is bent, so that the wire harness is protected.

Preferably, the air duct port located outside the motor housing is located at an end of the motor shaft.

Preferably, the air duct has a bent shape.

Preferably, the harness penetration passage and the air duct are respectively located at both ends of the stator assembly.

Preferably, the motor housing comprises a side cover and a drum brake end cover which are integrally installed and connected and respectively located at two ends of the stator assembly, wherein the side cover and the drum brake end cover are respectively sleeved on the motor shaft in a relatively rotatable manner.

Preferably, an edge cover sealing ring is arranged between the outer port of the edge cover and the motor shaft, and a drum brake end cover sealing ring is arranged between the outer port of the drum brake end cover and the motor shaft.

Preferably, a wire harness penetrating protective sleeve is inserted in the wire harness penetrating channel, and the wire harness positioned in the motor shell penetrates the protective sleeve through the wire harness to be led out in a concentrated mode.

Preferably, a sheath is arranged between the wire harness through channel port positioned inside the motor shell and the wire harness through protective sleeve.

Preferably, the stator assembly includes a stator core mounted at an outer circumference of a stator holder, and the stator holder is integrally mounted with the motor shaft.

Preferably, a vent valve is connected to a vent port located inside the motor housing.

The application provides a motor shaft structure with a specific structure, and particularly provides that a wire harness penetrating channel and an air duct structure are respectively arranged in a motor shaft of an electric vehicle, and meanwhile, the wire harness penetrating channel and the air duct are not connected, when the motor shaft is actually installed and applied, the wire harness penetrating channel is used for penetrating a wire harness, the motor wire harness can be led out from the inside of a motor shell, and meanwhile, the air duct structure which is not connected with the wire harness penetrating channel can keep an air communication effect between the inside and the outside of the motor shell; this application realizes the motor casing to the intercommunication effect between its inside outside to having highly sealed requirement through set up pencil through-channel and air vent structure respectively in motor shaft inside, is particularly suitable for the inside electric motor car motor application that has the coolant liquid of annotating of motor casing, is favorable to advancing the application process that motor and controller realized integrative integration in the electric motor car field.

Drawings

FIG. 1 is a schematic structural diagram of an integrated motor controller assembly for an electric vehicle according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of a controller mounted on an end face of a stator assembly according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of a motor shaft according to an embodiment of the present application;

FIG. 4 is a schematic view of a lower seal ring according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of an integrated component of a motor controller for an electric vehicle according to embodiment 3 of the present application;

fig. 6 is a schematic structural view of a motor shaft in embodiment 3 of the present application.

Detailed Description

The embodiment of the utility model discloses a motor shaft for an electric vehicle, wherein the motor shaft and a stator assembly are installed into a whole, the stator assembly is positioned in a motor shell, a wire harness through channel and an air duct are respectively arranged in the motor shaft, the wire harness through channel and the air duct both extend from the outside of the motor shell to the inside of the motor shell, and the wire harness through channel is not connected with the air duct.

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1: referring to fig. 1, a motor controller integrated component 1 for an electric vehicle is disclosed, wherein a brushless permanent magnet synchronous motor is specifically adopted as a motor; the motor comprises a permanent magnet rotor assembly 30 integrally installed with a hub 10 and a motor shell 20 of an electric vehicle, and a stator assembly 50 integrally installed with a motor shaft 40 and located on the inner periphery of the permanent magnet rotor assembly 30, wherein the stator assembly 50 is located inside the motor shell 20, and a controller 60 for driving and controlling the motor is installed on the end surface of the stator assembly 50, preferably, in the embodiment, the stator assembly 50 comprises a stator core 52 installed on the outer periphery of a stator retainer 51, the stator retainer 51 is integrally installed with the motor shaft 40, and meanwhile, one end of the stator retainer 51 is provided with an installation groove 53 located on the outer periphery of the motor shaft 40, and the controller 60 is installed in the installation groove 53;

in order to achieve a high heat dissipation effect, in the present embodiment, the motor housing 20 is provided with an injection port (not shown) for injecting an insulating coolant (specifically, cooling oil 70 having an insulating effect) while the inside of the motor shaft 40 is provided with a vent channel 41 extending from the inside of the motor housing 20 to the outside of the motor housing 20, and a vent channel port 41a located inside the motor housing 20 is connected to a vent valve 41 b;

as further shown in fig. 2, in order to achieve the efficient heat dissipation effect, preferably, in the present embodiment, the controller 60 includes a circuit board 61 (specifically, circular) fixedly installed in the installation groove 53, and the circuit board 61 is sleeved on the outer periphery of the motor shaft 40; at least a portion of the stator assembly 50 and the circuit board 61 are in direct thermally conductive contact with the cooling oil 70; further preferably, in the present embodiment, the controller 60 further includes a heat dissipating aluminum plate 62 fixedly installed in the installation groove 53, each MOS tube 61a of the circuit board 61 is respectively and fixedly installed on the heat dissipating aluminum plate 62 (specifically, in a ring shape) located at the outer periphery of the circuit board 61, and 5 MOS tubes 61a shown in fig. 2 are installed and distributed in an evenly spaced manner; at least part of the heat-radiating aluminum plate 62 is in direct heat-conducting contact with the cooling oil 70, and the heat-radiating aluminum plate 62 with a larger area is further arranged, so that the heat-radiating effect of the embodiment can be further obviously facilitated; in the present embodiment, the circuit board 61 further has a plurality of electrolytic capacitors 63 and a single chip microcomputer chip 64, and these electronic components are selected by the conventional techniques of those skilled in the art, and therefore, the detailed description thereof is omitted;

preferably, in order to achieve the sealed leading-out effect of the wire harness 80, in the present embodiment, the controller 60 is electrically connected with the windings of the stator assembly 50, and the output wire harness 80 of the controller 60 is led out to the outside of the motor housing 20 by penetrating through the motor shaft 40; specifically, preferably, in the present embodiment, the hall line 61B of the circuit board 61 is electrically connected to the hall element 54 of the stator assembly 50, the phase line 61c of the circuit board 61 is electrically connected to the phase line of the winding of the stator assembly 50, and the communication line 61d (specifically, the communication line a and the communication line B), the wheel movement signal line 61e, the power line 61f, and the start line 61g of the circuit board 61 extend to the outside of the motor housing 20 by penetrating through the motor shaft 40; wherein, the communication wire 61d and the wheel movement signal wire 61e of the controller 60 are respectively connected to a central control device (not shown) of the electric vehicle to realize communication connection with the central control device, and the power wire 61f of the circuit board 61 is connected to an external power supply (not shown);

preferably, in this embodiment, the controller 60 is provided with an electromagnetic filtering control module, which performs filtering processing after integrating the motor with the controller 60, and the electromagnetic filtering control module may adopt an anti-electromagnetic interference control technology in the prior art in combination, which is not described in this embodiment.

The embodiment also provides an electric vehicle, which adopts the motor controller integrated component 1; the rated power range of the electric vehicle is 300W-2 KW; more preferably 300W-1 KW; certainly, the present application can also apply to electric vehicles with other parameters and rated powers, which can produce similar technical effects as the present application, and the present embodiment does not particularly limit the present application uniquely; the electric vehicle in the embodiment can be a two-wheeled electric vehicle, a three-wheeled electric vehicle and a four-wheeled electric vehicle with a similar driving and mounting structure.

The applicant applies the embodiment to the conventional two-wheeled electric vehicle and three-wheeled electric vehicle, and through practical verification, the heat dissipation requirement can be met, and the drive control performance of the motor is not influenced.

Example 2: on the basis of the above embodiment 1, please refer to fig. 3 in combination with fig. 1, this embodiment 2 further proposes a preferred solution of the motor shaft 40, the motor shaft 40 and the stator assembly 50 are integrally installed, the stator assembly 50 is located inside the motor housing 20, wherein the motor shaft 40 is internally provided with the harness through channel 42 and the air duct 41, respectively, the harness through channel 42 and the air duct 41 both extend from the outside of the motor housing 20 to the inside of the motor housing 20, and the harness through channel 42 is not connected to the air duct 41; preferably, in the present embodiment, the harness penetration passage 42 and the air duct 41 are respectively located at both ends of the stator assembly 50, ensuring that interference does not occur therebetween;

preferably, in the present embodiment, the air duct 41 is parallel to the motor shaft 40, and the air valve 41b and the air duct 41 are vertically installed to facilitate the ventilation between the inside and the outside of the motor housing 20; specifically, it is preferable that the air duct port 41c located outside the motor housing 20 is located at the end of the motor shaft 40;

in order to protect the wire harness during the drawing process, it is preferable that the wire harness penetrating passage 42 is bent in the present embodiment, and the bending angle is designed to protect the wire harness 80 from abrasion from the motor shaft 40; a wire harness penetrating protective sleeve 81 is inserted in the wire harness penetrating channel 42, and the wire harness 80 positioned in the motor shell 20 is led out in a centralized manner through the wire harness penetrating protective sleeve 81; further specifically, preferably, in the present embodiment, a sheathing 82 is provided between the harness penetration passage port 42a and the harness penetration sheath 81 inside the motor housing 20;

in order to achieve the sealing installation effect, in the present embodiment, the motor housing 20 includes a side cover 21 and a drum brake end cover 22, which are integrally installed and connected and located at two ends of the stator assembly 50, respectively, wherein the side cover 21 and the drum brake end cover 22 are respectively sleeved on the motor shaft 40 in a relatively rotatable manner; preferably, in the present embodiment, a side cover sealing ring 23 is provided between the outer port of the side cover 21 and the motor shaft 40, and a drum brake end cover sealing ring 24 is provided between the outer port of the drum brake end cover 22 and the motor shaft 40; specifically, referring to fig. 4, in the present embodiment, the rubber seal 25 with the metal insert 25a is used for both the edge cover seal ring 23 and the drum brake end cover seal ring 24 in example 2, so that a good sealing effect can be achieved, and the present embodiment is particularly suitable for the application in which the cooling oil 70 is injected into the motor housing 20 in example 1.

In this embodiment 2, a structure of a motor shaft 40 with a specific structure is specifically proposed, and specifically, a structure of a wire harness through channel 42 and an air duct 41 are respectively provided inside the motor shaft 40 for an electric vehicle, while it is ensured that the wire harness through channel 42 is not connected with the air duct 41, when in actual installation and application, the wire harness through channel 42 is used for penetrating a wire harness 80, the wire harness 80 of the motor controller integrated component 1 can be led out from the inside of the motor housing 20, and meanwhile, the air duct 41 structure which is not connected with the wire harness through channel 41 can maintain an air communication effect between the inside and the outside of the motor housing 20; the motor shell 20 with high sealing requirements is communicated between the inner part and the outer part of the motor shell 20 by respectively arranging the wire harness through channel 42 and the air channel 41 in the motor shaft 40, and the motor shell is particularly suitable for the application occasions where the cooling oil 70 is injected into the motor shell 20 in embodiment 1.

Example 3: referring to fig. 5 and 6, this embodiment 3 further proposes another embodiment of the motor shaft 40 ', in this embodiment 3, the air duct 41 ' is bent, and particularly, preferably, the air valve 41b and the air duct 41 ' are vertically installed, and the air duct port 41c ' located outside the motor housing 20 is located at a non-end portion of the motor shaft 40 '.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (10)

1. The motor shaft for the electric vehicle is characterized in that a wire harness through channel and an air duct are respectively arranged in the motor shaft, the wire harness through channel and the air duct both extend from the outside of the motor shell to the inside of the motor shell, and the wire harness through channel and the air duct are not connected.

2. The motor shaft of claim 1, wherein the air channel is parallel to the motor shaft to facilitate air flow between the interior and exterior of the motor housing; the wire harness penetrating passage is bent, so that the wire harness is protected.

3. The motor shaft for electric vehicles as claimed in claim 1, wherein an air duct port located outside a motor housing is located at an end of the motor shaft.

4. The motor shaft for electric vehicles as claimed in claim 1, wherein the air duct has a bent shape.

5. The motor shaft for an electric vehicle according to claim 1, wherein the harness penetration passage and the air duct are respectively located at both ends of the stator assembly.

6. The motor shaft as claimed in claim 1, wherein the motor housing comprises a side cover and a drum brake end cover integrally mounted and connected to each other at two ends of the stator assembly, wherein the side cover and the drum brake end cover are rotatably sleeved on the motor shaft.

7. The motor shaft for electric vehicles of claim 6, wherein a side cover sealing ring is provided between the outer port of the side cover and the motor shaft, and a drum brake end cover sealing ring is provided between the outer port of the drum brake end cover and the motor shaft.

8. The motor shaft for the electric vehicle as claimed in claim 1, wherein a harness penetration sheath is inserted into the harness penetration passage, and the harness positioned inside the motor housing is led out concentratedly through the harness penetration sheath.

9. The motor shaft of claim 6 wherein a sheath is disposed between the harness through passage port located inside the motor housing and the harness through boot.

10. The motor shaft for the electric vehicle as claimed in claim 1, wherein the stator assembly includes a stator core mounted at an outer circumference of a stator holder, the stator holder being integrally mounted with the motor shaft; the vent channel port positioned in the interior of motor shell is connected with vent valve.

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