CN116388457A - Steering motor and old electric vehicle with same - Google Patents
Steering motor and old electric vehicle with same Download PDFInfo
- Publication number
- CN116388457A CN116388457A CN202310087306.4A CN202310087306A CN116388457A CN 116388457 A CN116388457 A CN 116388457A CN 202310087306 A CN202310087306 A CN 202310087306A CN 116388457 A CN116388457 A CN 116388457A
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- 230000005540 biological transmission Effects 0.000 claims abstract description 81
- 230000007246 mechanism Effects 0.000 claims abstract description 17
- 238000011065 in-situ storage Methods 0.000 abstract description 6
- 230000001360 synchronised effect Effects 0.000 description 12
- 230000009467 reduction Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
- B62D5/046—Controlling the motor
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- 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
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The utility model discloses a steering motor and an elderly electric vehicle with the same, wherein the steering motor comprises: the motor comprises a motor shell, a rotor, a stator and a first output shaft and a second output shaft, wherein the rotor and the stator are arranged in the motor shell, the first output shaft and the second output shaft are connected to the two ends of the rotor through transmission components, the transmission components at the two sides comprise output gears fixedly arranged on the rotor, planetary gear transmission mechanisms meshed with the output gears on the first output shaft or the second output shaft, the planetary gear transmission mechanisms at the two sides are connected through a differential gear structure, and the differential gear structure is connected with a control motor for driving the differential gear structure to rotate, so that the problems that the control stability of a current motor is poor and the in-situ automatic turning cannot be realized are solved.
Description
Technical Field
The application relates to the technical field of motors, in particular to a steering motor and an electric vehicle with the motor for the aged.
Background
The existing coaxial differential motor at present, such as CN201918842U, discloses a double-rotor differential motor, which comprises an outer rotor, an inner rotor, a central rotating shaft and a planetary gear differential, wherein the inner rotor consists of a silicon steel sheet and a winding coil which are fixed on the central rotating shaft, the outer rotor consists of a rotor shell and a permanent magnet, and two ends of the rotor shell are sleeved on the central rotating shaft through bearings; the planetary gear differential comprises a differential shell, a left bevel gear, a right bevel gear and a differential planetary gear set which is simultaneously meshed with the left bevel gear and the right bevel gear, wherein a constant-speed cross shaft is connected between the differential planetary gear set and the differential shell; a planetary gear mechanism with a reversing function is arranged in the right bevel gear, and comprises a reversing planetary gear set, an outer gear ring, a planetary carrier and a sun gear; the reversing planetary gear set is assembled in the right bevel gear; the planet carrier is connected with the right bevel gear, and the inner rotor drives the right bevel gear to rotate after being changed by the planet gear mechanism through a sun gear connected to the central rotating shaft.
The structure adopts the inner rotor and the outer rotor and simultaneously adopts a large number of bevel gears, so that the motor has a large overall structure, the motor cannot be refined, in addition, when two output shafts have speed difference, for example, when the motor is applied to a vehicle and one side of wheels encounters an obstacle or turns, the situation that the rotation speed of the output shaft on one side is high and the rotation speed of the output shaft on the other side is low can occur, and the situation that the torque force is larger can occur at present, so that the vehicle is difficult to control.
In addition, a steering motor installed on the current elderly electric vehicle, such as CN212332292U, the disclosed two-stage planetary reduction coaxial bridge comprises: a motor, a secondary planetary reduction gear set disposed in the first housing, a Torson differential, a first output shaft, a second output shaft, a first housing, and a second housing, the motor disposed in the second housing; the second-stage planetary reduction gear set consists of a front-row sun gear, a front-row planet carrier, a first hollow shaft, a second hollow shaft, a rear-row sun gear, a rear-row planet carrier, a shaft sleeve and a gear ring; compared with the prior art, the two-stage planetary reduction coaxial bridge provided by the utility model adopts a direct connection structure of the driving motor and the rear axle, a gearbox and a transmission shaft in a conventional vehicle transmission system are eliminated, a power source is replaced by a motor through an engine, and the power is transmitted through the connection of a speed reducer.
With development and serious aging, the old people select to use the old electric vehicle to replace the walking at present, and when the old electric vehicle is used for replacing the walking at present, a motor controller is used for controlling a motor, and an algorithm is used for controlling a differential motor, so that the stability is poor, and the function of automatic turning in situ cannot be realized.
In view of the above, those skilled in the art are urgent to develop a motor for an aged electric vehicle or an electric wheelchair, thereby solving the problems that the control stability of the motor is poor and the in-situ automatic turning cannot be realized at present.
Disclosure of Invention
The main aim of the application is to provide a steering motor and an old electric vehicle with the motor, which solve the problems that the control stability of the current motor is poor and the in-situ automatic turning cannot be realized.
In order to achieve the above object, in a first aspect, the present application provides a steering motor.
A steering motor according to the present application, comprising: the motor comprises a motor shell, a rotor, a stator and a first output shaft and a second output shaft, wherein the rotor and the stator are arranged in the motor shell, the first output shaft and the second output shaft are connected to the two ends of the rotor through transmission components, the transmission components at the two sides comprise output gears fixedly arranged on the rotor, planetary gear transmission mechanisms meshed with the output gears on the first output shaft or the second output shaft, the planetary gear transmission mechanisms at the two sides are connected through differential gear structures, and the differential gear structures are connected with a control motor for driving the planetary gear transmission mechanisms to rotate.
The planetary gear transmission mechanism comprises a planetary support fixedly arranged on the first output shaft or the second output shaft, a planetary wheel rotatably arranged on the planetary support and meshed with the output gear, and a transmission piece rotatably arranged on the rotor, wherein the transmission piece is provided with an inner gear ring meshed with the planetary wheel, and the transmission piece is connected with the differential system gear structure through a transmission part.
The differential gear structure comprises a first differential gear shaft and a second differential gear shaft which are rotatably arranged, a first differential gear fixedly arranged on the first differential gear shaft, and a second differential gear fixedly arranged on the second differential gear shaft and meshed with the first differential gear, wherein the first differential gear shaft and the second differential gear shaft are respectively connected with the transmission parts on the corresponding sides through the transmission parts.
Further improved is that the transmission part comprises an outer gear ring arranged on the transmission part and a third differential gear which is coaxially and fixedly arranged on the first differential gear shaft or the second differential gear shaft and is meshed with the outer gear ring.
The transmission part comprises a first synchronous wheel arranged on the transmission part, a second synchronous wheel fixedly arranged on the first differential gear shaft or the second differential gear shaft, and a synchronous belt connected between the first synchronous wheel and the second synchronous wheel.
The planetary gear is characterized in that the planetary carrier is rotatably provided with three planetary gears, and the three planetary gears are uniformly distributed on the circumference taking the center of the output gear as the center of a circle.
Further improved is that the planet wheel comprises a first gear meshed with the output gear and a second gear coaxially arranged with the first gear, and the second gear is meshed with the inner gear ring of the transmission piece.
In a further development, the transmission elements are each connected in rotation to the rotor by means of a rotary bearing.
The further improvement is that a perforation for the rotor to pass through is formed on one end face of the transmission piece, a cavity is formed on the other end face of the transmission piece, the inner gear ring is arranged on one side of the cavity, and the other side of the cavity is a mounting cavity of the rotating bearing.
In a second aspect, the application also provides an electric vehicle for the elderly, which comprises an electric vehicle frame and the steering motor.
Compared with the prior art, the steering motor and the aged electric vehicle with the motor have the beneficial effects that: when the speed is uniform, the control motor is used for controlling the differential gear structure, and the control motor does not work, because the rotating speeds of the rotor, the first output shaft and the second output shaft are the same, at the moment, the first gear, the transmission piece and the differential gear do not act, when steering is needed, the control motor rotates positively to drive the differential gear structure to act, namely, the transmission piece at one side rotates positively, the transmission piece at the other side rotates reversely, so that the first gears at two sides are driven to rotate positively and reversely, one output shaft at two sides is in speed limiting, the other output shaft at two sides is in speed accelerating, the differential speed is generated, and the side with higher speed is the outer side of steering, so that stable steering is realized, and the action of turning in situ can be realized.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to provide a further understanding of the application with regard to the other features, objects and advantages of the application. The drawings of the illustrative embodiments of the present application and their descriptions are for the purpose of illustrating the present application and are not to be construed as unduly limiting the present application. In the drawings:
FIG. 1 is a schematic illustration of a steering motor;
FIG. 2 is a schematic diagram of the steering motor interior;
FIG. 3 is a second schematic illustration of the steering motor interior;
FIG. 4 is a third schematic illustration of the steering motor interior;
fig. 5 is a schematic diagram of the steering motor interior.
Wherein: 1. a rotor; 2. a motor housing; 3. a stator; 4. a first output shaft; 5. a second output shaft; 6. a transmission member; 7. an output gear; 8. a first gear; 9. a second gear; 10. a third differential gear; 11. a first differential gear shaft; 12. a second differential gear shaft; 13. a first differential gear; 14. a second differential gear; 15. and controlling the motor.
Detailed Description
In order to make the present application solution better understood by those skilled in the art, the following description will be made in detail and with reference to the accompanying drawings in the embodiments of the present application, it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe the present application and its embodiments and are not intended to limit the indicated device, element or component to a particular orientation or to be constructed and operated in a particular orientation.
Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 5, a steering motor comprises a motor housing 2, a rotor 1 and a stator 3 which are arranged in the motor housing 2, and a first output shaft 4 and a second output shaft 5 which are connected to two ends of the rotor 1 through transmission components; the transmission components on two sides comprise an output gear 7 fixedly arranged on the rotor 1, a planetary gear transmission mechanism (NGW or NW type) arranged on the first output shaft 4 or the second output shaft 5 and meshed with the output gear 7, in order to ensure structural stability, three planetary gears are rotationally arranged on the planetary carrier, the three planetary gears are evenly distributed on the circumference taking the center of the output gear 7 as the center of a circle, the two sides are connected through a differential gear structure, the planetary gear transmission mechanism comprises a planetary carrier fixedly arranged on the first output shaft 4 or the second output shaft 5, planetary gears rotationally arranged on the planetary carrier and meshed with the output gear 7, a transmission member 6 rotationally arranged on the rotor 1, the transmission member 6 is provided with an inner gear ring meshed with the planetary gears, the transmission member 6 is connected with the differential gear structure through a transmission member, and the differential gear structure is connected with a control motor for driving the differential gear structure to rotate.
The working principle of the transmission structure is as follows: when the first output shaft 4 and the second output shaft 5 move at the same speed, the first output shaft 4 and the second output shaft 5 are at the same speed with the rotor 1, the second gear 9 and the transmission member 6 with the inner gear ring meshed with the second gear 9 are relatively static, so that the differential gear structure is also in a static state, when the differential speed is generated, if the speed of the first output shaft 4 is reduced and is smaller than that of the rotor 1, the situation can possibly happen that the second gear 9 on the first output shaft 4 side rotates reversely relative to the rotor 1 when a vehicle turns or one side wheel of the vehicle encounters an obstacle, the transmission member 6 on the first output shaft 4 side is driven to rotate reversely relative to the rotor 1, and after the differential gear structure is adopted, the transmission member 6 on the second output shaft 5 side rotates in the same direction relative to the rotor 1 and is transmitted to the second gear 9 on the second output shaft 5, so that the rotating speed of the second output shaft 5 is improved, the rotating speed of the wheel on the outer side of the corner can be accelerated when the vehicle turns, the rotating speed efficiency is greatly improved, the torque force is indirectly reduced, and the control of the vehicle is facilitated for a driver.
In addition, in the aspect of motor differential control, the differential system gear structure is controlled by the control motor 15, when the speed is uniform, the control motor 15 does not work, because the rotating speeds of the rotor, the first output shaft 4 and the second output shaft 5 are the same, at the moment, the differential system gear structure does not act, when the steering is needed, the control motor 15 rotates positively to drive the connecting component to act, namely, one side transmission part rotates positively, the other side transmission part 6 rotates reversely, thereby driving the second gears 9 on two sides to rotate positively and reversely, one of the output shafts on two sides is the speed limiting function, the other one of the output shafts on two sides is the speed accelerating function, thus differential speed is generated, one side with higher speed is the outer side of the steering, stable steering is realized, and when the rotating speed of the output shaft on one side is zero, namely, the rotating speed on the other side is the fastest, the action of in-situ steering can be carried out.
In this embodiment, the differential gear structure preferably includes a first differential gear shaft 11 and a second differential gear shaft 12 that are rotatably disposed, a first differential gear 13 that is fixedly disposed on the first differential gear shaft 11, and a second differential gear 14 that is fixedly disposed on the second differential gear shaft 12 and meshes with the first differential gear 13, and the first differential gear shaft 11 and the second differential gear shaft 12 are respectively connected to the transmission member 6 on the corresponding side through the transmission members.
As shown in fig. 2 and 3, the transmission member includes an outer gear ring provided on the transmission member 6, a third differential gear 10 coaxially and fixedly provided on the first differential gear shaft 11 or the second differential gear shaft 12 and meshed with the outer gear ring, and of course, the transmission manner is not limited to the above gear transmission, but may also include a first synchronous wheel provided on the transmission member 6, a second synchronous wheel fixedly provided on the first differential gear shaft 11 or the second differential gear shaft 12, and a synchronous belt connected between the first synchronous wheel and the second synchronous wheel, and the transmission manner of the synchronous wheel and the synchronous belt may be real-time, but is relatively gear transmission, and the occupation volume thereof is relatively large, so when the transmission structure is applied to a motor, the transmission manner of the gear transmission is preferentially selected.
In order to ensure a reduction in overall volume, the planetary gear comprises a first gear 8 which meshes with the output gear 7, a second gear 9 which is arranged coaxially with the first gear 8, the second gear 9 meshing with the inner gear ring of the transmission 6.
Contrast between motor in this technical scheme and the current motor:
1. in the prior art, bevel gears are used for realizing the differential function. It is known that conical gears are more complex to manufacture and install than cylindrical gears, and that transmission vibrations and noise are greater than those of cylindrical gears, so that the conical gears are more applicable to low-speed transmission. The cylindrical gear is used for replacing the conical gear, so that the gear is convenient to process and install, and the gear processing precision can be higher.
2. The prior art differentials are all coupled to the differential after the motor is mounted with a reduction gear, that is, the differential itself has no reduction function. The utility model utilizes the characteristics of the cylindrical gear planetary reduction mechanism, not only realizes the differential function of two output shafts, but also fully utilizes the advantages of compact planetary reduction structure and large speed ratio, and realizes the output of small volume and large reduction ratio.
3. In the prior art (such as an electric tricycle driving axle), motors are all arranged outside a differential mechanism, so that the whole mechanism is large in structure and is unfavorable for vehicle application with limited space. The utility model creatively installs the motor and the output shaft coaxially, has compact structure and small space occupation
In this embodiment, preferably, the transmission member 6 is rotatably connected with the rotor 1 through a rotating bearing respectively, so as to reduce the occupied volume, a hole through which the rotor 1 passes is formed in one end surface of the transmission member 6, a cavity is formed in the other end surface of the transmission member, and the ring gear is disposed on one side of the cavity, and the other side of the cavity is a mounting cavity of the rotating bearing, so that the ring gear and the ring gear on the transmission member body are not affected, and the mounting volume is reduced.
As shown in fig. 4 and 5, for convenience in processing, the output gear 7 and the rotor 1 are integrally formed, and the output gear 7 section on the rotor 1 may be machined, or may be integrally formed by die forging, etc., instead of assembling, so that the coaxiality is ensured, and meanwhile, the process steps are reduced and the strength is ensured.
As shown in fig. 4 and 5, in order to reduce the volume problem, in the present embodiment, it is preferable that the second gear 9, the third differential gear 10, the first differential gear 13, and the second differential gear 14 are all spur gears.
Not shown, in addition this scheme still has included the old electric motor car that has used above-mentioned steering motor, including electric motor car frame and above-mentioned steering motor.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. A steering motor, comprising: the motor comprises a motor shell, a rotor, a stator and a first output shaft and a second output shaft, wherein the rotor and the stator are arranged in the motor shell, the first output shaft and the second output shaft are connected to the two ends of the rotor through transmission components, the transmission components at the two sides comprise output gears fixedly arranged on the rotor, planetary gear transmission mechanisms meshed with the output gears on the first output shaft or the second output shaft, the planetary gear transmission mechanisms at the two sides are connected through differential gear structures, and the differential gear structures are connected with a control motor for driving the planetary gear transmission mechanisms to rotate.
2. The steering motor according to claim 1, wherein the planetary gear transmission mechanism includes a planetary carrier fixedly provided on the first output shaft or the second output shaft, a planetary wheel rotatably provided on the planetary carrier to be meshed with the output gear, a transmission member rotatably provided on the rotor, the transmission member having an inner gear ring to be meshed with the planetary wheel, the transmission member being connected to the differential gear structure through a transmission member.
3. The steering motor according to claim 2, wherein the differential gear structure includes a first differential gear shaft and a second differential gear shaft that are rotatably provided, a first differential gear fixedly provided on the first differential gear shaft, a second differential gear fixedly provided on the second differential gear shaft and meshed with the first differential gear, and the first differential gear shaft and the second differential gear shaft are connected to the transmission members on the respective sides by the transmission members.
4. The steering motor according to claim 3, wherein the transmission member includes an outer ring gear provided on the transmission member, and a third differential gear coaxially fixedly provided on the first differential gear shaft or the second differential gear shaft and meshed with the outer ring gear.
5. The steering motor according to claim 3, wherein the transmission member includes a first synchronizing wheel provided on the transmission member, a second synchronizing wheel fixedly provided on the first differential gear shaft or the second differential gear shaft, and a timing belt connected between the first synchronizing wheel and the second synchronizing wheel.
6. The steering motor of claim 1, wherein the planetary carrier is rotatably provided with three planetary gears uniformly distributed on a circumference centered on the center of the output gear.
7. The steering motor of claim 2, wherein the planetary gear includes a first gear meshed with the output gear, a second gear coaxially disposed with the first gear, the second gear meshed with an inner gear ring of the transmission.
8. A steering motor according to claim 2, wherein the transmission members are each rotatably connected to the rotor by means of a rotary bearing.
9. The steering motor of claim 8, wherein one end face of the driving member is provided with a through hole through which the rotor passes, the other end face thereof is provided with a cavity, the ring gear is disposed on one side of the cavity, and the other side of the cavity is a mounting cavity of the rotating bearing.
10. An electric vehicle for elderly people, characterized by comprising an electric vehicle frame and a steering motor according to claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310087306.4A CN116388457A (en) | 2023-02-07 | 2023-02-07 | Steering motor and old electric vehicle with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310087306.4A CN116388457A (en) | 2023-02-07 | 2023-02-07 | Steering motor and old electric vehicle with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116388457A true CN116388457A (en) | 2023-07-04 |
Family
ID=86964547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310087306.4A Pending CN116388457A (en) | 2023-02-07 | 2023-02-07 | Steering motor and old electric vehicle with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116388457A (en) |
-
2023
- 2023-02-07 CN CN202310087306.4A patent/CN116388457A/en active Pending
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