CN113043831A - High-power heavy-load electric wheel driving motor light-weight method and driving motor - Google Patents

High-power heavy-load electric wheel driving motor light-weight method and driving motor Download PDF

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Publication number
CN113043831A
CN113043831A CN202110448913.XA CN202110448913A CN113043831A CN 113043831 A CN113043831 A CN 113043831A CN 202110448913 A CN202110448913 A CN 202110448913A CN 113043831 A CN113043831 A CN 113043831A
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CN
China
Prior art keywords
driving motor
rotor
end cover
motor rotor
drive motor
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Pending
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CN202110448913.XA
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Chinese (zh)
Inventor
倪大成
周志宇
董平
李文
陆雄建
彭乐
彭鸿基
倪淑银
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Hunan Power Action Technology Co ltd
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Hunan Power Action Technology Co ltd
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Application filed by Hunan Power Action Technology Co ltd filed Critical Hunan Power Action Technology Co ltd
Priority to CN202110448913.XA priority Critical patent/CN113043831A/en
Publication of CN113043831A publication Critical patent/CN113043831A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K7/00—Disposition of motor in, or adjacent to, traction wheel
    • B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B7/00—Wheel cover discs, rings, or the like, for ornamenting, protecting, venting, or obscuring, wholly or in part, the wheel body, rim, hub, or tyre sidewall, e.g. wheel cover discs, wheel cover discs with cooling fins
    • B60B7/0013—Hub caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
    • B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
    • B60T1/06—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels
    • B60T1/062—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels acting otherwise than on tread, e.g. employing rim, drum, disc, or transmission or on double wheels acting on transmission parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction 

Abstract

A high-power heavy-load electric wheel drive motor light-weight method and a drive motor are characterized in that non-acting parts on two sides of a drive motor rotor are removed by utilizing the characteristics of a high-power heavy-load electric wheel drive motor rotor structure to form drive motor rotors with concave parts on two sides, then a support bearing of the drive motor rotor is moved to the concave space of the removed parts on two sides of the drive motor rotor, and a drive motor mandrel is compressed to the concave space of the removed parts on two sides of the drive motor rotor, so that the axial structure size of the drive motor is compressed, the total weight of the drive motor is reduced, and the light weight of the drive motor is. The invention provides a high-power heavy-load electric wheel drive motor and a light-weight method thereof, which can simplify the structure of the drive motor in a limited space, reduce the weight of the drive motor, improve the power density and the heavy-load performance, have compact structure and greatly reduce the weight under the same power.

Description

High-power heavy-load electric wheel driving motor light-weight method and driving motor
Technical Field
The invention relates to a method and a structure for lightening a driving motor of an electric driving power assembly, in particular to a method and a driving motor for lightening a high-power heavy-load electric wheel driving motor, which can effectively reduce the overall structure of a driving electric wheel and reduce the weight of the electric wheel; belongs to the technical field of electric drive manufacturing.
Background
The driving motor is a key part of the electric wheel and also is the part occupying the largest volume, and occupies a very important position in a two-in-one electric driving assembly synthesized by the current driving motor and a speed reducer and a three-in-one electric driving assembly synthesized by the driving motor, the speed reducer and a braking device. Particularly, as the application of the electric driving wheel is more and more extensive, the requirements on how to improve the power and reduce the volume are higher and higher; in some specific working conditions, for example, how to change the original other driving into electric driving in the original space or how to further increase the braking power density of the electric wheel in the original space, the modification of the driving motor aims at the main targets of the two-in-one electric driving assembly and the three-in-one electric driving assembly.
On the other hand, in order to improve the mounting flexibility of the electric drive wheel and to extend the electric drive endurance of the electric wheel, the size and weight of the electric wheel are emphasized to be reduced, but at present, there is no good method for reducing the size and weight of the dual-system high-power heavy-duty electric wheel, and thus no intensive research and investigation is conducted. However, for some specific power assemblies, especially for electric drive assemblies requiring high power, because the installation space of the aerial drive assembly is extremely limited, and no more space can be obtained in the axial dimension, it is not easy to realize three-in-one that integrates the speed reducer, the drive motor and the brake together for such narrow space, and because the axial space of the power assembly in the narrow space is limited and is a relatively fixed dimension, the brake, the speed reducer and the drive motor are all installed in the power assembly, besides considering the structural dimension, the overall structural strength, the transmission efficiency and how to lubricate and seal are all the implementation problems that need to be solved; the axial space size is mainly obtained, and the characteristics of the original driving assembly are not influenced, which is difficult to realize; especially for the electric drive assembly with high power density and heavy load, a three-in-one electric drive assembly scheme is adopted, wherein the speed reducer is arranged on the left side, the drive motor is arranged in the middle, the brakes are arranged on the two sides, and the axial position cannot be expanded outwards any more, so that how to integrate the double brakes and the speed reducer into the assembly of the drive motor is a difficult point worthy of improvement.
Patent documents in which the same technology as that of the present invention is not found through patent search are reported, and the following patents which have a certain relationship with the present invention are mainly included:
1. the patent number is CN201920599899.1, the name is "drive the electronic wheel of braking integration of integrated disk inner rotor wheel hub motor and reduction gear", the applicant is: the patent discloses a driving and braking integrated electric wheel integrating a disc type inner rotor hub motor and a speed reducer, which comprises an external rim, a disc type motor, the speed reducer and a brake disc, wherein the disc type motor, the speed reducer and the brake disc are installed in the rim; the rotor is connected with the input end of the speed reducer to drive the speed reducer to work, the rim is connected with the output end of the speed reducer to realize rotation, the stator assembly is electrified to drive the rotor to rotate to drive the speed reducer to operate, and the output end of the speed reducer drives the rim to rotate. Although this patent changes the motor of electronic round into the disk motor, installs in electronic wheel hub, this kind of structure is the heavy load electronic round that can not be used for high power density, and because power density is big to the heavy load electronic round of high power density, leads to whole stopper structure increase, so can't realize integrating it to the wheel hub the inside.
2. Patent No. CN201420278039.5 entitled "brushless gearless electric hub with rotary input power", filed as: xu zhou huahai zhongyi electromechanical industry limited's utility model patent, this patent discloses a brushless toothless electric wheel hub with rotatory input power belongs to the wheel hub motor. The iron core of the magnetic steel stator of the electric hub is connected with the through shaft, the winding rotor is positioned in the hub shell and is connected with the hub shell into a whole, and the end covers on the two sides of the hub shell are respectively supported on the through shaft through bearings; the storage battery is fixed on the outer wall of the hub shell through a screw, a power line is in rotary output, an insulating material is attached to the outer surface of the power line, the power line passes through a wire outlet groove in the motor end cover after passing through a brake and is connected with a winding of the magnetic steel stator, magnetic steel of the magnetic steel stator is bonded on a stator iron core, a Hall element is bonded in the winding groove, and the storage battery is connected with a winding of a winding rotor; when the motor is electrified, continuous rotating torque can be generated, and the motor and the stator magnetic steel generate continuous rotating torque through electronic commutation of the Hall element, so that the hub shell is driven to rotate. The brake of this patent is mounted on the side of the motor, which is not a space for the three-in-one electric drive assembly of the aerial platform and is therefore not feasible.
3. The patent number is CN201020135835.5, entitled "coaxial middle drive motor assembly for electric vehicle with built-in brake", the applicant is: the patent discloses a coaxial middle-mounted driving motor assembly for an electric vehicle with a built-in brake, which comprises a driving assembly shell and a shell sealing end cover, wherein a motor middle shaft hole, a waterproof sealing chamber, a bearing chamber and a control circuit board chamber are sequentially formed in the shell sealing end cover; a control circuit board is arranged in the control circuit board chamber; the radiating surface of each power amplifier tube of the control circuit board is fastened with the sealing end cover surface of the shell, and the sealing end cover of the shell is used as the radiating surface of the power amplifier tube. And the shell sealing end cover is tightly fastened with the end face of the shell of the drive assembly in a sealing way. The patent is named as a built-in brake, but the brake device and the speed reducer are not integrated, so that the problem is not existed in the place which is not limited by the axial dimension, and the problem of how to radiate and fix is only needed to be considered, so the technology disclosed by the document can not know how to reasonably make the axial position dimension of the aerial platform and install the brake on the inner surface of the driving motor.
Through careful analysis of the above patents, although the patents relate to motor structures of electric wheels, some improved technical solutions are proposed, but these technical solutions are not completely suitable for electric driving wheel structures with heavy power density, and especially, in the case of realizing high power density and heavy load by further increasing power density in a limited space, the consideration of miniaturization and light weight of the whole electric driving wheel is lacking, so further research and improvement are still needed.
Disclosure of Invention
The invention aims to provide a novel high-power heavy-load electric wheel driving motor light-weight method and a driving motor aiming at the aspect that the existing electric driving assembly is lack of miniaturization and light-weight.
In order to achieve the purpose, the invention provides a method for lightening a high-power heavy-load electric wheel driving motor, which is characterized in that the rotor structure of the high-power heavy-load electric wheel driving motor is utilized, non-acting parts on two sides of the driving motor rotor are removed to form the driving motor rotor with concave parts on two sides, then a supporting bearing of the driving motor rotor is moved to the concave space of the removed parts on two sides of the driving motor rotor, and meanwhile, a driving motor mandrel is also compressed to the concave space of the removed parts on two sides of the driving motor rotor to compress the axial structure size of the driving motor, so that the total weight of the driving motor is reduced, and the lightening of the driving motor is.
Furthermore, the removal of the non-acting parts on the two sides of the driving motor rotor is to excavate the driving motor rotor, grooves are respectively excavated from the middle parts on the two sides of the driving motor rotor to the central part to form a double-concave driving motor rotor structure, the outer ring part of the driving motor rotor acting with the stator and the mandrel of the motor rotor are supported by a supporting rib, one end of the supporting rib is connected with the middle of the outer ring part of the driving motor rotor, and the other end of the supporting rib is connected with the middle of the mandrel of the driving motor rotor to form a king-shaped driving motor rotor section structure.
Furthermore, the mandrel of the driving motor is compressed into the concave space of the removed parts at the two sides of the rotor of the driving motor, the mandrel is divided into two parts, one part is a main shaft connected with the speed reducer, a sealing groove for sealing the speed reducer is further arranged on the part connected with the speed reducer, and the sealing of the speed reducer is formed in the sealing groove through a sealing ring; the other part of the mandrel is an auxiliary shaft, and a parking brake is arranged on the auxiliary shaft; after grooves are dug towards the central part at the middle parts of the two sides of the driving motor rotor respectively, the main shaft and the auxiliary shaft are moved into the groove spaces dug at the two sides of the driving motor rotor, and the supporting bearing of the mandrel is also moved into the grooves dug at the side surfaces of the driving motor rotor, so that a double-concave type driving motor integral structure is formed, and the axial size of the driving motor is shortened.
Furthermore, the support bearing of the mandrel is moved into the groove dug out on the side surface of the driving motor rotor, and the positions of the support bearing of the driving motor rotor are respectively arranged on the main shaft and the auxiliary shaft of the mandrel of the driving motor rotor; and the bearing position for supporting the drive motor rotor is moved into the groove dug out from the two ends of the bearing position to the side surface of the drive motor rotor respectively and is moved to the position close to the support rib in the groove of the drive motor rotor, so that the axial structural size of the whole drive motor is effectively shortened, and a space is provided for lightening the high-power heavy-load drive motor.
Furthermore, the supporting bearings are respectively arranged on bearing seats of end covers extending into the driving motor rotor; end covers at two ends of the driving motor respectively form structures protruding into the rotor of the driving motor, and the supporting bearing of the rotor of the driving motor is guaranteed to move to a position close to the supporting rib inside the groove of the rotor of the driving motor.
Furthermore, the driving motor and the speed reducer in the end covers at the two ends of the driving motor adopt a common end cover structure, and a right end cover at one side of the driving motor and an end cover at one side of the speed reducer are connected into a whole to form a combined end cover; and the combined end cover is of a combined structure and is formed by combining a right end cover of the driving motor and a speed reducer end cover, the speed reducer end cover is installed on the right end cover of the driving motor through a fastener, and the speed reducer end cover extends into the groove of the rotor of the driving motor to form a common supporting bearing seat structure for the supporting bearing of the rotor of the driving motor and the supporting bearing of the speed reducer, so that the axial structural size of the connection between the driving motor and the speed reducer is reduced.
A high-power heavy-load driving motor light-weight driving motor comprises a driving motor shell, a driving motor stator, a driving motor rotor, a left end cover and a right end cover, wherein the driving motor stator is embedded in the driving motor shell, and the driving motor rotor is positioned in the driving motor stator and between the left end cover and the right end cover; the method is characterized in that: the driving motor rotor is divided into a rotor application part, a support rib and a mandrel; the rotor application part is connected with the mandrel through a support rib to form a supporting rib structure which is concave inwards from two sides at the middle part of the rotor of the driving motor, and grooves which are concave into the support rib are arranged at two sides of the support rib; and the left end cover and the right end cover respectively extend into the groove of the driving motor rotor from two sides of the driving motor rotor, bearing seats for supporting the driving motor rotor are arranged on the inner surface of the driving motor rotor by the left end cover and the right end cover, and the support bearing of the driving motor rotor forms a support in the groove of the driving motor rotor.
Furthermore, the support rib structure of the shape like the Chinese character 'wang' which forms the middle part of the driving motor rotor inwards concave from two sides is that grooves are dug out from the middle parts of the two sides of the driving motor rotor to the central part respectively to form the support rib support structure of the driving motor rotor, one end of a support rib is connected with the application part of the driving motor, the other end of the support rib is connected with the middle position of a mandrel of the driving motor rotor, and the driving motor rotor structure of the section of the shape like the Chinese character 'wang' is formed.
Furthermore, the support of the support bearing of the drive motor rotor in the groove of the drive motor rotor is realized by moving the position of the bearing of the left end cover and the position of the bearing of the right end cover for supporting the drive motor rotor to the position close to the center of gravity of the interior of the drive motor rotor, and moving the position of the bearing for supporting the drive motor rotor to the interior of the drive motor rotor from two sides respectively, so that the axial structural size of the whole drive motor is shortened, and a space is provided for lightening the high-power heavy-load drive motor.
Furthermore, the right end cover and the reducer end cover adopt a common end cover structure, the right end cover of the driving motor and the end cover on one side of the reducer are connected into a whole, the reducer end cover is installed on the right end cover of the driving motor through a fastener, and the reducer end cover extends into the groove of the rotor of the driving motor to form a common supporting bearing seat structure for the rotor supporting bearing of the driving motor and the supporting bearing of the reducer; an input shaft of the speed reducer and an output shaft of the driving motor extend into a rotor mandrel of the driving motor and are connected through a spline; the center of dabber is the shoulder hole form, and leans on outermost shoulder hole to be the splined hole, and the input shaft of reduction gear inserts the internal connection of splined hole, further reduces driving motor and retarder connection's axial structure size.
The invention has the advantages that:
the invention provides a high-power heavy-load electric wheel drive motor and a light-weight method thereof, which can simplify the structure of the drive motor in a limited space, reduce the weight of the drive motor, improve the power density and the heavy-load performance, have compact structure and greatly reduce the weight under the same power and have the following advantages:
1. the middle part of the driving motor is recessed towards the center in two directions, so that the middle internal space of the rotor of the driving motor can be effectively utilized, and other parts can be effectively integrated into the driving motor for the high-power electric wheel, so that the axial structure size of the electric wheel is effectively shortened, and the purposes of miniaturization and light weight of the electric wheel are achieved;
2. the driving motor rotor adopts a structure that the end cover of the driving motor and the end cover of the speed reducer share the end cover, and the supporting bearing of the driving motor and the supporting bearing of the speed reducer are arranged in the same bearing seat in parallel, so that the integral structure of the driving motor is simplified, the axial structural size of the driving motor can be greatly reduced, the driving motor and the speed reducer are integrated, and a large space is provided for reducing the size of the integral electric wheel and the weight of the electric wheel;
3. the supporting position of the driving motor rotor is respectively moved from the outside of the driving motor rotor to the inner surface of the driving motor rotor and is close to the gravity center position, so that the axial size of the driving motor is greatly shortened, and the reduction of the overall structure size of the electric wheel in a limited space is facilitated;
4. according to the invention, each component is subjected to light weight treatment, so that the overall weight of the electric wheel can be effectively reduced, and the aim of light weight is fulfilled.
Drawings
FIG. 1 is a schematic diagram of the general structure of a dual-braking high-power heavy-load electric wheel according to the present invention;
fig. 2 is a schematic structural view of a rotor of a driving motor with a lightweight structure according to the present invention.
Detailed Description
The invention is further illustrated with reference to the following figures and specific examples.
Example one
The invention relates to a high-power heavy-load driving motor lightweight driving motor which can be seen from the attached drawings, and comprises a driving motor shell 1, a driving motor stator 2, a driving motor rotor 3, a left end cover 4 and a right end cover 5, wherein the driving motor stator 2 is embedded in the driving motor shell 1, and the driving motor rotor 3 is positioned in the driving motor stator 2 and between the left end cover 4 and the right end cover 5; the driving motor rotor 3 comprises a rotor 6 part, a supporting rib 7 and a mandrel 8; the rotor application part 6 is connected with the mandrel 8 through a supporting rib 7, and the supporting rib 7 is positioned in the middle of the rotor to form a section structure of the drive motor rotor 3 in a shape like the Chinese character 'wang' taking the supporting rib 7 as a support, so that the middle part of the rotor can be fully utilized to install devices of other parts; the weight of the motor rotor is reduced, and the axial position of the motor rotor connected with other parts can be shortened; grooves 9 which are recessed from the end surface of the rotor application part 6 to the supporting ribs are arranged on the two sides of the supporting ribs 7; the left end cover 4 and the right end cover 5 respectively extend into the groove 9 of the driving motor rotor 3 from two sides of the driving motor rotor, and the left end cover 4 and the right end cover 5 form a support for the driving motor rotor 3 on the inner face of the groove 9 of the driving motor rotor 3.
Furthermore, the section structure of the drive motor rotor 3 in the shape of the Chinese character 'wang' taking the support ribs 7 as a support is characterized in that grooves 9 are dug from the end faces of two sides of the drive motor rotor 3 to the central part respectively, so that the drive motor rotor application part 6 is supported by the support ribs 7, one end of each support rib 7 is connected with the drive motor rotor application part 6, the other end of each support rib 7 is connected with a mandrel 8 of the drive motor rotor, the mandrel 8 is divided into two parts, and the support ribs 7 are connected with the mandrel 8 in the middle of the mandrel 8 to form the drive motor rotor structure in the shape of the Chinese character 'wang' in section.
Furthermore, the left end cover 4 and the right end cover 5 form a support for the drive motor rotor in the drive motor rotor 3, namely, the support bearings 10 and 11 for supporting the drive motor rotor by the left end cover 4 and the right end cover 5 are moved to the position close to the center of gravity in the drive motor rotor 3 and are respectively arranged close to the support ribs 7 from two sides, so that the axial structure size of the whole drive motor can be effectively shortened, and a space is provided for lightening the high-power heavy-load drive motor.
The right end cover 5 is of a combined structure, one part of the right end cover is a driving motor end cover part 15, the other part of the right end cover is a speed reducer end cover part 13, the speed reducer end cover part 13 of the speed reducer 12 is fixed on the driving motor end cover part 15 through a fastener 16 to form the driving motor right end cover 5 which is connected into a whole, the speed reducer end cover part 13 extends into the groove 9 on the inner face of the driving motor rotor 3, and the driving motor rotor 3 is supported in the groove 9 on the inner face of the driving motor rotor 3. The supporting bearing of the driving motor rotor 3 is arranged in a bearing seat of a speed reducer end cover part 13 extending into a groove 9 on the inner surface of the driving motor rotor 3, and is arranged in the same bearing seat of the speed reducer end cover part 13 with a speed reducer planet wheel supporting bearing side by side to form a common end cover structure of the driving motor and the speed reducer 12, so that the connecting structure can be further simplified, and the weight of the motor and other parts is reduced.
Furthermore, an input shaft 14 of the speed reducer and a mandrel 8 of the driving motor extend into the mandrel 8 of the rotor of the driving motor and are connected through splines; the center of dabber 8 is the shoulder hole form, and leans on outermost shoulder hole to be the splined hole, and the input shaft 14 of reduction gear inserts in the splined hole of dabber 8, connects through the internal spline, further reduces driving motor and retarder connection's axial structure size.
Further, the spindle 8 is divided into two parts, one part is a main shaft part 18 connected with the reducer 12, and the other part is an auxiliary shaft part 19 connected with the parking brake 17; the main shaft portion and the auxiliary shaft portion are respectively provided with support bearings 10 and 11 for supporting the driving motor rotor 3, and the support bearings 10 and 11 are located in the groove 9 on the inner surface of the driving motor rotor 3.
Through the description of the embodiment, it can be seen that the invention also relates to a method for lightening the high-power heavy-load electric wheel driving motor, which is characterized in that the structure of the rotor of the high-power heavy-load electric wheel driving motor is utilized to remove the non-acting parts on the two sides of the rotor of the driving motor to form the driving motor rotor with concave parts on the two sides, then the supporting bearing of the driving motor rotor is moved into the concave space of the removed parts on the two sides of the rotor of the driving motor, and simultaneously the mandrel of the driving motor is also compressed into the concave space of the removed parts on the two sides of the rotor of the driving motor to compress the axial structure size of the driving motor, thereby lightening the total.
Furthermore, the removal of the non-acting parts on the two sides of the driving motor rotor is to excavate the driving motor rotor, grooves are respectively excavated from the middle parts on the two sides of the driving motor rotor to the central part to form a double-concave driving motor rotor structure, the outer ring part of the driving motor rotor acting with the stator and the mandrel of the motor rotor are supported by a supporting rib, one end of the supporting rib is connected with the middle of the outer ring part of the driving motor rotor, and the other end of the supporting rib is connected with the middle of the mandrel of the driving motor rotor to form a king-shaped driving motor rotor section structure.
Furthermore, the mandrel of the driving motor is compressed into the concave space of the removed parts at the two sides of the rotor of the driving motor, the mandrel is divided into two parts, one part is a main shaft connected with the speed reducer, a sealing groove for sealing the speed reducer is further arranged on the part connected with the speed reducer, and the sealing of the speed reducer is formed in the sealing groove through a sealing ring; the other part of the mandrel is an auxiliary shaft, and a parking brake is arranged on the auxiliary shaft; after grooves are dug towards the central part at the middle parts of the two sides of the driving motor rotor respectively, the main shaft and the auxiliary shaft are moved into the groove spaces dug at the two sides of the driving motor rotor, and the supporting bearing of the mandrel is also moved into the grooves dug at the side surfaces of the driving motor rotor, so that a double-concave type driving motor integral structure is formed, and the axial size of the driving motor is shortened.
Furthermore, the support bearing of the mandrel is moved into the groove dug out on the side surface of the driving motor rotor, and the positions of the support bearing of the driving motor rotor are respectively arranged on the main shaft and the auxiliary shaft of the mandrel of the driving motor rotor; and the bearing position for supporting the drive motor rotor is moved into the groove dug out from the two ends of the bearing position to the side surface of the drive motor rotor respectively and is moved to the position close to the support rib in the groove of the drive motor rotor, so that the axial structural size of the whole drive motor is effectively shortened, and a space is provided for lightening the high-power heavy-load drive motor.
Furthermore, the supporting bearings are respectively arranged on bearing seats of end covers extending into the driving motor rotor; end covers at two ends of the driving motor respectively form structures protruding into the rotor of the driving motor, and the supporting bearing of the rotor of the driving motor is guaranteed to move to a position close to the supporting rib inside the groove of the rotor of the driving motor.
Furthermore, the driving motor and the speed reducer in the end covers at the two ends of the driving motor adopt a common end cover structure, and a right end cover at one side of the driving motor and an end cover at one side of the speed reducer are connected into a whole to form a combined end cover; and the combined end cover is of a combined structure and is formed by combining a right end cover of the driving motor and a speed reducer end cover, the speed reducer end cover is installed on the right end cover of the driving motor through a fastener, and the speed reducer end cover extends into the groove of the rotor of the driving motor to form a common supporting bearing seat structure for the supporting bearing of the rotor of the driving motor and the supporting bearing of the speed reducer, so that the axial structural size of the connection between the driving motor and the speed reducer is reduced.
The above listed embodiments are only for clear and complete description of the technical solution of the present invention with reference to the accompanying drawings; it should be understood that the embodiments described are only a part of the embodiments of the present invention, and not all embodiments, and the terms such as "upper", "lower", "front", "back", "middle", etc. used in this specification are for clarity of description only, and are not intended to limit the scope of the invention, which can be implemented, and the changes or modifications of the relative relationship thereof are also regarded as the scope of the invention without substantial technical changes. Meanwhile, the structures, the proportions, the sizes, and the like shown in the drawings are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions under which the present invention can be implemented, so that the present invention has no technical essence, and any structural modification, changes in proportion relation, or adjustments of the sizes, can still fall within the range covered by the technical contents disclosed in the present invention without affecting the effects and the achievable purposes of the present invention. 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.
The invention has the advantages that:
the invention provides a high-power heavy-load electric wheel drive motor and a light-weight method thereof, which can simplify the structure of the drive motor in a limited space, reduce the weight of the drive motor, improve the power density and the heavy-load performance, have compact structure and greatly reduce the weight under the same power and have the following advantages:
1. the middle part of the driving motor is recessed towards the center in two directions, so that the middle internal space of the rotor of the driving motor can be effectively utilized, and other parts can be effectively integrated into the driving motor for the high-power electric wheel, so that the axial structure size of the electric wheel is effectively shortened, and the purposes of miniaturization and light weight of the electric wheel are achieved;
2. the driving motor rotor adopts a structure that the end cover of the driving motor and the end cover of the speed reducer share the end cover, and the supporting bearing of the driving motor and the supporting bearing of the speed reducer are arranged in the same bearing seat in parallel, so that the integral structure of the driving motor is simplified, the axial structural size of the driving motor can be greatly reduced, the driving motor and the speed reducer are integrated, and a large space is provided for reducing the size of the integral electric wheel and the weight of the electric wheel;
3. the supporting position of the driving motor rotor is respectively moved from the outside of the driving motor rotor to the inner surface of the driving motor rotor and is close to the gravity center position, so that the axial size of the driving motor is greatly shortened, and the reduction of the overall structure size of the electric wheel in a limited space is facilitated;
4. according to the invention, each component is subjected to light weight treatment, so that the overall weight of the electric wheel can be effectively reduced, and the aim of light weight is fulfilled.

Claims (10)

1. A high-power heavy-load electric wheel driving motor light-weight method is characterized in that: utilize the characteristics of high power heavy load electric wheel drive motor rotor structure, get rid of drive motor rotor both sides non-effect part, form the drive motor rotor of both sides indent, move the support bearing of drive motor rotor to drive motor rotor both sides in getting rid of the indent space of part again, in also compressing the drive motor dabber to drive motor rotor both sides in getting rid of the indent space of part simultaneously, compress drive motor's axial structure size to alleviate drive motor overall weight, realize the drive motor lightweight.
2. The high-power heavy-duty electric wheel drive motor weight reduction method according to claim 1, characterized in that: the removal of the non-acting parts on the two sides of the driving motor rotor is to excavate the driving motor rotor, grooves are respectively excavated from the middle parts on the two sides of the driving motor rotor to the central part, a double-concave driving motor rotor structure is formed, the outer ring part of the driving motor rotor and the stator and the mandrel of the motor rotor are supported by supporting ribs, one end of each supporting rib is connected with the middle of the outer ring part of the driving motor rotor, and the other end of each supporting rib is connected with the middle of the mandrel of the driving motor rotor, so that the section structure of the driving motor rotor in a shape like the Chinese character 'wang' is formed.
3. The high-power heavy-duty electric wheel drive motor weight reduction method according to claim 2, characterized in that: the mandrel of the driving motor is also compressed into the concave space of the removed parts at the two sides of the rotor of the driving motor, the mandrel is divided into two parts, one part is a main shaft connected with the speed reducer, a sealing groove for sealing the speed reducer is also arranged at the part connected with the speed reducer, and the sealing of the speed reducer is formed in the sealing groove through a sealing ring; the other part of the mandrel is an auxiliary shaft, and a parking brake is arranged on the auxiliary shaft; after grooves are dug towards the central part at the middle parts of the two sides of the driving motor rotor respectively, the main shaft and the auxiliary shaft are moved into the groove spaces dug at the two sides of the driving motor rotor, and the supporting bearing of the mandrel is also moved into the grooves dug at the side surfaces of the driving motor rotor, so that a double-concave type driving motor integral structure is formed, and the axial size of the driving motor is shortened.
4. The high-power heavy-duty electric wheel drive motor weight reduction method according to claim 3, characterized in that: the support bearing of the mandrel is also moved into the groove dug out on the side surface of the driving motor rotor, and the positions of the support bearing of the driving motor rotor are respectively arranged on the main shaft and the auxiliary shaft of the mandrel of the driving motor rotor; and the bearing position for supporting the drive motor rotor is moved into the groove dug out from the two ends of the bearing position to the side surface of the drive motor rotor respectively and is moved to the position close to the support rib in the groove of the drive motor rotor, so that the axial structural size of the whole drive motor is effectively shortened, and a space is provided for lightening the high-power heavy-load drive motor.
5. The high-power heavy-duty electric wheel drive motor weight reduction method according to claim 4, characterized in that: the supporting bearings are respectively arranged on bearing seats of end covers extending into the driving motor rotor; end covers at two ends of the driving motor respectively form structures protruding into the rotor of the driving motor, and the supporting bearing of the rotor of the driving motor is guaranteed to move to a position close to the supporting rib inside the groove of the rotor of the driving motor.
6. The high-power heavy-duty electric wheel drive motor weight reduction method according to claim 5, characterized in that: the driving motor and the speed reducer in the end covers at the two ends of the driving motor adopt a common end cover structure, and a right end cover at one side of the driving motor and an end cover at one side of the speed reducer are connected into a whole to form a combined end cover; and the combined end cover is of a combined structure and is formed by combining a right end cover of the driving motor and a speed reducer end cover, the speed reducer end cover is installed on the right end cover of the driving motor through a fastener, and the speed reducer end cover extends into the groove of the rotor of the driving motor to form a common supporting bearing seat structure for the supporting bearing of the rotor of the driving motor and the supporting bearing of the speed reducer, so that the axial structural size of the connection between the driving motor and the speed reducer is reduced.
7. A high-power heavy-load driving motor light-weight driving motor comprises a driving motor shell, a driving motor stator, a driving motor rotor, a left end cover and a right end cover, wherein the driving motor stator is embedded in the driving motor shell, and the driving motor rotor is positioned in the driving motor stator and between the left end cover and the right end cover; the method is characterized in that: the driving motor rotor is divided into a rotor application part, a support rib and a mandrel; the rotor application part is connected with the mandrel through a support rib to form a supporting rib structure which is concave inwards from two sides at the middle part of the rotor of the driving motor, and grooves which are concave into the support rib are arranged at two sides of the support rib; and the left end cover and the right end cover respectively extend into the groove of the driving motor rotor from two sides of the driving motor rotor, bearing seats for supporting the driving motor rotor are arranged on the inner surface of the driving motor rotor by the left end cover and the right end cover, and the support bearing of the driving motor rotor forms a support in the groove of the driving motor rotor.
8. The high power heavy duty drive motor lightweight drive motor of claim 7, characterized in that: the supporting rib structure of the king shape is characterized in that grooves are dug out from the middle parts of the two sides of the driving motor rotor to the central part respectively to form the supporting rib structure of the driving motor rotor, one end of the supporting rib is connected with the application part of the driving motor, the other end of the supporting rib is connected with the middle position of the mandrel of the driving motor rotor, and the driving motor rotor structure with the king shape cross section is formed.
9. The high power heavy duty drive motor lightweight drive motor of claim 7, characterized in that: the support bearing of the driving motor rotor forms a support in the groove of the driving motor rotor, namely the bearing position of the left end cover and the right end cover for supporting the driving motor rotor is moved to the position close to the center of gravity inside the driving motor rotor, and the bearing position for supporting the driving motor rotor is moved to the inside of the driving motor rotor from two sides respectively, so that the axial structure size of the whole driving motor is shortened, and a space is provided for the light weight of a high-power heavy-load driving motor.
10. The high power heavy duty drive motor lightweight drive motor of claim 7, characterized in that: the right end cover and the reducer end cover adopt a common end cover structure, the right end cover of the driving motor and the end cover on one side of the reducer are connected into a whole, the reducer end cover is installed on the right end cover of the driving motor through a fastener, and the reducer end cover extends into the groove of the rotor of the driving motor to form a common supporting bearing seat structure for the rotor supporting bearing of the driving motor and the supporting bearing of the reducer; an input shaft of the speed reducer and an output shaft of the driving motor extend into a rotor mandrel of the driving motor and are connected through a spline; the center of dabber is the shoulder hole form, and leans on outermost shoulder hole to be the splined hole, and the input shaft of reduction gear inserts the internal connection of splined hole, further reduces driving motor and retarder connection's axial structure size.
CN202110448913.XA 2021-04-25 2021-04-25 High-power heavy-load electric wheel driving motor light-weight method and driving motor Pending CN113043831A (en)

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Application publication date: 20210629