CN116191763A - Transmission structure with differential mechanism function and motor with transmission structure - Google Patents

Transmission structure with differential mechanism function and motor with transmission structure Download PDF

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Publication number
CN116191763A
CN116191763A CN202310087279.0A CN202310087279A CN116191763A CN 116191763 A CN116191763 A CN 116191763A CN 202310087279 A CN202310087279 A CN 202310087279A CN 116191763 A CN116191763 A CN 116191763A
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CN
China
Prior art keywords
gear
transmission
differential
shaft
rotor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310087279.0A
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Chinese (zh)
Inventor
薛振江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Tiger Drive Technology Co ltd
Original Assignee
Suzhou Tiger Drive Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Tiger Drive Technology Co ltd filed Critical Suzhou Tiger Drive Technology Co ltd
Priority to CN202310087279.0A priority Critical patent/CN116191763A/en
Publication of CN116191763A publication Critical patent/CN116191763A/en
Pending legal-status Critical Current

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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
    • 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
    • B60K1/00—Arrangement or mounting of electrical propulsion units
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/06—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing
    • B60K17/08—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of change-speed gearing of mechanical type
    • 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
    • B60K17/00—Arrangement or mounting of transmissions in vehicles
    • B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
    • B60K17/16—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing of differential gearing
    • 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)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Retarders (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention discloses a transmission structure with a differential mechanism function and a motor with the transmission structure, wherein the transmission structure comprises: the rotor is connected to a first output shaft and a second output shaft at two ends of the rotor through transmission components; the transmission assemblies on both sides comprise output gears fixedly arranged on the rotor, planetary gear transmission mechanisms which are arranged on the first output shaft or the second output shaft and meshed with the output gears, and the planetary gear transmission mechanisms on both sides are connected through a differential gear structure, so that the problems of large size and large torque force in the related art are solved.

Description

Transmission structure with differential mechanism function and motor with transmission structure
Technical Field
The application relates to the technical field of motors, in particular to a transmission structure with a differential mechanism function and a motor with the transmission structure.
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 planetary support is connected with the right bevel gear, and the inner rotor drives the right bevel gear to rotate after being changed by the planetary gear mechanism through a sun gear connected to the central rotating shaft.
The motor is characterized in that the motor is provided with an inner rotor and an outer rotor, a large number of bevel gears are adopted, the motor is large in integral structure, refinement cannot be achieved, in addition, when two output shafts are different in speed, if the motor is applied to a vehicle, one side of the motor is in obstacle meeting with wheels or is turned, the rotation speed of the output shaft on one side of the motor is high, the rotation speed of the output shaft on the other side of the motor is low, and larger torque force is generated when the situation occurs at present, so that the vehicle is difficult to control.
For the above reasons, those skilled in the art are urgent to develop a motor for vehicles, thereby solving the problems of large size and large torque force of the existing coaxial differential motor.
Disclosure of Invention
The main objective of the present application is to provide a transmission structure with a differential mechanism function and a motor with the transmission structure, so as to solve the problems of large volume and large torque in the related art.
To achieve the above object, in a first aspect, the present application provides a transmission structure having a differential function.
According to the transmission structure with differential mechanism function of this application, include: the rotor is connected to a first output shaft and a second output shaft at two ends of the rotor through transmission components; the transmission assemblies on both sides comprise output gears fixedly arranged on the rotor, and planetary gear transmission mechanisms which are arranged on the first output shaft or the second output shaft and meshed with the output gears, and the planetary gear transmission mechanisms on both sides are connected through a differential gear structure.
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 further provides a motor, which comprises a motor housing, the transmission structure with the differential mechanism function and the stator, wherein the transmission structure and the stator are arranged in the motor housing, and the stator is matched with a rotor in the transmission structure.
Compared with the prior art, the transmission structure with the differential mechanism function and the motor with the transmission structure have the beneficial effects that: 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 invention 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 invention creatively installs the motor and the output shaft coaxially, and has compact structure and small space occupation.
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 diagram of an electric motor;
FIG. 2 is a schematic diagram of a transmission structure I;
FIG. 3 is a second schematic diagram of a transmission structure;
FIG. 4 is a third schematic diagram of a transmission configuration;
fig. 5 is a schematic diagram of a transmission structure.
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. and a second differential gear.
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. 2-5, a transmission structure with differential functionality includes: the rotor 1 is connected to a first output shaft 4 and a second output shaft 5 at 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 uniformly distributed on the circumference taking the center of the output gear 7 as the center of the 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, and the transmission member 6 is connected with the differential gear structure through a transmission member.
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.
Working principle: 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 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.
As shown in fig. 1, the present solution further includes a motor using the above transmission structure, including a motor housing 2, the above transmission structure disposed in the motor housing 2, and a stator 3, where the stator 3 is matched with a rotor 1 in the transmission structure.
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 transmission structure having a differential function, comprising: the rotor is coaxially connected to a first output shaft and a second output shaft at two ends of the rotor through transmission components; the transmission assemblies on both sides comprise output gears fixedly arranged on the rotor, and planetary gear transmission mechanisms which are arranged on the first output shaft or the second output shaft and meshed with the output gears, and the planetary gear transmission mechanisms on both sides are connected through a differential gear structure.
2. The transmission structure with a differential function 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, planetary gears rotatably provided on the planetary carrier to be engaged with the output gears, a transmission member rotatably provided on the rotor, the transmission member having an inner gear ring engaged with the planetary gears, the transmission member being connected to the differential gear structure through a transmission member.
3. The transmission structure with a differential function according to claim 2, wherein the differential gear structure includes a first differential gear shaft and a second differential gear shaft which 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 with the transmission members on the respective sides by the transmission members.
4. The transmission structure having a differential function 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 to be engaged with the outer ring gear.
5. The transmission structure having a differential function 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 transmission structure with the differential mechanism function according to claim 1, wherein three planetary gears are rotatably provided on the planetary carrier, and the three planetary gears are uniformly distributed on a circumference centering on the center of the output gear.
7. The transmission structure with a differential function according to claim 2, wherein the planetary gear includes a first gear meshing with the output gear, a second gear coaxially provided with the first gear, the second gear meshing with an inner gear ring of the transmission.
8. The transmission structure having a differential function as set forth in claim 2, wherein said transmission members are rotatably connected to said rotors through respective rotary bearings.
9. The transmission structure with the differential mechanism function according to claim 8, wherein a through hole through which the rotor passes is formed at one end face of the transmission member, a cavity is formed at the other end face thereof, the ring gear is disposed at one side of the cavity, and the other side of the cavity is a mounting cavity of the rotating bearing.
10. An electric machine, characterized by comprising a motor housing, a transmission structure with a differential function as claimed in claims 1-9 arranged in the motor housing, and a stator, wherein the stator is matched with a rotor in the transmission structure.
CN202310087279.0A 2023-02-07 2023-02-07 Transmission structure with differential mechanism function and motor with transmission structure Pending CN116191763A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310087279.0A CN116191763A (en) 2023-02-07 2023-02-07 Transmission structure with differential mechanism function and motor with transmission structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310087279.0A CN116191763A (en) 2023-02-07 2023-02-07 Transmission structure with differential mechanism function and motor with transmission structure

Publications (1)

Publication Number Publication Date
CN116191763A true CN116191763A (en) 2023-05-30

Family

ID=86443858

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310087279.0A Pending CN116191763A (en) 2023-02-07 2023-02-07 Transmission structure with differential mechanism function and motor with transmission structure

Country Status (1)

Country Link
CN (1) CN116191763A (en)

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