CN114953984A - Transmission mechanism and wheel-side electric drive system - Google Patents

Transmission mechanism and wheel-side electric drive system Download PDF

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Publication number
CN114953984A
CN114953984A CN202210720347.8A CN202210720347A CN114953984A CN 114953984 A CN114953984 A CN 114953984A CN 202210720347 A CN202210720347 A CN 202210720347A CN 114953984 A CN114953984 A CN 114953984A
Authority
CN
China
Prior art keywords
gear
primary
shaft
gear shaft
planet carrier
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
CN202210720347.8A
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Chinese (zh)
Inventor
詹东安
石国国
闫伟朋
李文跃
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Jiangsu Advanced Construction Machinery Innovation Center Ltd
Original Assignee
Jiangsu Advanced Construction Machinery Innovation Center 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 Jiangsu Advanced Construction Machinery Innovation Center Ltd filed Critical Jiangsu Advanced Construction Machinery Innovation Center Ltd
Priority to CN202210720347.8A priority Critical patent/CN114953984A/en
Publication of CN114953984A publication Critical patent/CN114953984A/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
    • 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
    • B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
    • B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
    • 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
    • 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
    • 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
    • Y02T10/62—Hybrid vehicles

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The invention relates to a transmission mechanism which comprises a first gear shaft, a second gear shaft, a primary planetary mechanism and a secondary planetary mechanism, wherein the first gear shaft is in transmission connection with the second gear shaft, the second gear shaft is in transmission connection with the primary planetary mechanism, and the primary planetary mechanism is in transmission connection with the secondary planetary mechanism. The wheel-side electric driving system comprises a motor, a transmission mechanism, a fixed shell and a braking unit, wherein the motor is connected to the transmission mechanism, the transmission mechanism is installed in the fixed shell, and the braking unit is installed on the transmission mechanism. Through the dead axle gear pair on two gear shafts for input rotational speed scope is wider, can require nimble adjustment according to the velocity ratio, and can be under the limited condition in space, transmits bigger moment of torsion, and the structure is more reasonable, and work efficiency is higher, and integrated braking unit, braking performance is good, longe-lived.

Description

Transmission mechanism and wheel-side electric drive system
Technical Field
The invention relates to the technical field of wheel-side driving systems of engineering machinery, in particular to a transmission mechanism and a wheel-side electric driving system comprising the transmission mechanism.
Background
The traditional engineering machinery transmission system comprises an engine, a transmission shaft, a drive axle and the like, wherein power is transmitted to the transmission shaft by the engine through the transmission, the transmission shaft transmits the rotating speed and the torque to the drive axle, and then the rotating speed and the torque are transmitted to the wheel edge system through the drive axle. This approach is complicated and inefficient. In addition, with the increasing attention of the country on energy conservation and environmental protection, the new energy transmission system is also slowly applied to the engineering machinery, and the main engine new energy transmission system of the engineering machinery has three main modes at present: the first one is battery, motor, speed variator, transmission shaft and drive axle; the second is battery, motor, drive axle; the third is a battery, motor, integrated wheel driving structure. The third type is more efficient than the first and second types in view of the overall scheme.
The existing wheel-side electric driving scheme is mainly that a motor and a planetary transmission mechanism are added, or the planetary mechanism is divided into two stages, different planetary reduction mechanisms are controlled by adding a clutch, and output of two stages with different speed ratios is realized, for example, the scheme of the Chinese patent with the publication number of CN 103994187A.
At present, a motor matched with the technical scheme belongs to a low-speed large-torque motor, the size of the motor is increased, and the cost is higher. If the high-speed low-torque motor is matched, the problems of dynamic balance of a planetary mechanism, uneven load of a planetary wheel and the like caused by high speed of an input shaft exist in the conventional scheme.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a transmission mechanism and a wheel-side electric drive system, which have wider input rotating speed range, can be flexibly adjusted according to the requirement of a speed ratio, can transmit larger torque under the condition of limited space, and have more reasonable structure and higher working efficiency.
In one aspect, the present invention provides a transmission.
The transmission mechanism comprises a first gear shaft, a second gear shaft, a primary planetary mechanism and a secondary planetary mechanism, wherein the first gear shaft is in transmission connection with the second gear shaft, the second gear shaft is in transmission connection with the primary planetary mechanism, and the primary planetary mechanism is in transmission connection with the secondary planetary mechanism.
Optionally, a first fixed gear is disposed on the first gear shaft, a second fixed gear is disposed on the second gear shaft, and the first fixed gear is meshed with the second fixed gear.
Optionally, the primary planetary mechanism includes a primary sun gear, a primary planet gear, a primary ring gear, and a primary planet carrier, and the second gear shaft is fixedly connected to the primary sun gear.
Optionally, the secondary planetary mechanism comprises a secondary sun gear, a secondary planet gear, a secondary ring gear and a secondary planet carrier, and the primary planet carrier is fixedly connected to the secondary sun gear.
Optionally, the secondary planet carrier extends axially to form an output shaft.
Optionally, the second gear shaft, the primary sun gear, the primary planet carrier, the secondary sun gear, the secondary planet carrier, and the output shaft are all coaxial.
In another aspect, the invention further provides a wheel-side electric drive system.
The wheel side electric driving system comprises a motor, a transmission mechanism, a fixed shell and a braking unit, wherein the motor is connected to the transmission mechanism, the transmission mechanism is installed in the fixed shell, and the braking unit is installed on the transmission mechanism; the transmission mechanism comprises a first gear shaft, a second gear shaft, a primary planetary mechanism and a secondary planetary mechanism, wherein the first gear shaft is in transmission connection with the second gear shaft, the second gear shaft is in transmission connection with the primary planetary mechanism, and the primary planetary mechanism is in transmission connection with the secondary planetary mechanism.
Optionally, a first fixed gear is arranged on the first gear shaft, a second fixed gear is arranged on the second gear shaft, and the first fixed gear is meshed with the second fixed gear; the primary planetary mechanism comprises a primary sun gear, a primary planet gear, a primary gear ring and a primary planet carrier, and the second gear shaft is fixedly connected to the primary sun gear; the secondary planetary mechanism comprises a secondary sun gear, a secondary planet gear, a secondary gear ring and a secondary planet carrier, and the primary planet carrier is fixedly connected to the secondary sun gear; and the secondary planet carrier axially extends to form an output shaft.
Optionally, the second gear shaft, the primary sun gear, the primary planet carrier, the secondary sun gear, the secondary planet carrier, and the output shaft are all coaxial.
Optionally, the primary planet carrier is mounted to the secondary sun gear by a fixed coupling.
Optionally, the brake unit includes a rotor and a stator, the rotor is mounted on the second gear shaft, the first-stage planet carrier, the fixed coupling shaft, the second-stage planet carrier, or the output shaft, the stator is configured to be capable of being in press fit with the rotor, and the stator is mounted on the fixed housing.
Compared with the prior art, the technical scheme of the invention has the following beneficial effects: through the dead axle gear pair on two gear shafts for input rotational speed scope is wider, can require nimble adjustment according to the velocity ratio, and can be under the limited condition in space, transmits bigger moment of torsion, and the structure is more reasonable, and work efficiency is higher, and integrated braking unit, braking performance is good, longe-lived.
Drawings
Fig. 1 is a schematic transmission structure diagram of a transmission mechanism and a wheel-side electric drive system according to a first embodiment of the present invention;
fig. 2 is a schematic transmission structure diagram of a transmission mechanism and a wheel-side electric drive system according to a second embodiment of the present invention.
In the drawings: 11-first gear shaft, 12-second gear shaft, 21-first sun gear, 22-first planet gear, 23-first gear ring, 24-first planet carrier, 31-second sun gear, 32-second planet gear, 33-second gear ring, 34-second planet carrier, 41-moving plate and 42-static plate.
Detailed Description
Exemplary embodiments of the present invention are described below with reference to the accompanying drawings, in which various details of embodiments of the invention are included to assist understanding, and which are to be considered as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
Example one
As shown in fig. 1, the present invention relates to a transmission mechanism, comprising a first gear shaft 11, a second gear shaft 12, a primary planetary mechanism and a secondary planetary mechanism, wherein the first gear shaft 11 is in transmission connection with the second gear shaft 12, the second gear shaft 12 is in transmission connection with the primary planetary mechanism, the primary planetary mechanism is in transmission connection with the secondary planetary mechanism, a first fixed gear is arranged on the first gear shaft 11, a second fixed gear is arranged on the second gear shaft 12, the first fixed gear is engaged with the second fixed gear, the primary planetary mechanism comprises a primary sun gear 21, a primary planet gear 22, a primary ring gear 23 and a primary planet carrier 24, the second gear shaft 12 is fixedly connected to the primary sun gear 21, the secondary planetary mechanism comprises a secondary sun gear 31, a secondary planet gear 32, a secondary ring gear 33 and a secondary planet carrier 34, the primary planet carrier 24 is fixedly connected to the secondary sun gear 31, the second-stage planet carrier 34 axially extends to form an output shaft, wherein the second gear shaft 12, the first-stage sun gear 21, the first-stage planet carrier 24, the second-stage sun gear 31, the second-stage planet carrier 34 and the output shaft are all coaxial.
The wheel side electric driving system comprises a motor, a transmission mechanism, a fixed shell and a braking unit, wherein the motor is connected to the transmission mechanism, the transmission mechanism is arranged in the fixed shell, and the braking unit is arranged on the transmission mechanism; the primary planet carrier 24 is mounted to the secondary sun gear 31 through a fixed coupling; the brake unit includes a rotor 41 and a stator 42, the rotor 41 is mounted on the secondary planet carrier 34, the stator 42 is configured to be capable of press-fitting with the rotor 41, and the stator 42 is mounted on the stationary housing corresponding to the position of the rotor 41, wherein the primary ring gear 23 and the secondary ring gear 33 are both fixed on the stationary housing.
The brake unit in the first embodiment is a wet brake unit.
Example two
As shown in fig. 2, the present invention relates to a transmission mechanism, comprising a first gear shaft 11, a second gear shaft 12, a primary planetary mechanism and a secondary planetary mechanism, wherein the first gear shaft 11 is in transmission connection with the second gear shaft 12, the second gear shaft 12 is in transmission connection with the primary planetary mechanism, the primary planetary mechanism is in transmission connection with the secondary planetary mechanism, the first gear shaft 11 is provided with a first fixed gear, the second gear shaft 12 is provided with a second fixed gear, the first fixed gear is meshed with the second fixed gear, the primary planetary mechanism comprises a primary sun gear 21, a primary planet gear 22, a primary ring gear 23 and a primary planet carrier 24, the second gear shaft 12 is fixedly connected to the primary sun gear 21, the secondary planetary mechanism comprises a secondary sun gear 31, a secondary planet gear 32, a secondary ring gear 33 and a secondary planet carrier 34, the primary planet carrier 24 is fixedly connected to the secondary sun gear 31, the second-stage planet carrier 34 axially extends to form an output shaft, wherein the second gear shaft 12, the first-stage sun gear 21, the first-stage planet carrier 24, the second-stage sun gear 31, the second-stage planet carrier 34 and the output shaft are all coaxial.
The other wheel side electric driving system comprises a motor, a transmission mechanism, a fixed shell and a braking unit, wherein the motor is connected to the transmission mechanism, the transmission mechanism is arranged in the fixed shell, and the braking unit is arranged on the transmission mechanism; the primary planet carrier 24 is mounted to the secondary sun gear 31 through a fixed coupling; the brake unit includes a rotor 41 and a stator 42, the rotor 41 is mounted on the second gear shaft 12, the stator 42 is configured to be capable of press-fitting with the rotor 41, and the stator 42 is mounted on a stationary housing corresponding to a position of the rotor 41, wherein the primary ring gear 23 and the secondary ring gear 33 are both fixed on the stationary housing.
The brake unit in the second embodiment is a wet brake unit.
In other embodiments, the above-mentioned moving plate can also be selectively mounted on the primary planet carrier, the fixed coupling shaft or the output shaft, and the static plate is also mounted on the fixed shell corresponding to the position of the moving plate.
Compared with the prior art, the transmission mechanism and the wheel-side electric drive system have the advantages that the input rotating speed range is wider through the fixed-shaft gear pair on the two gear shafts, the transmission mechanism and the wheel-side electric drive system can be flexibly adjusted according to the requirement of the speed ratio, larger torque can be transmitted under the condition of limited space, the structure is more reasonable, the working efficiency is higher, the braking unit is integrated, the braking performance is good, and the service life is long.
The above detailed description should not be construed as limiting the scope of the invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions can occur, depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. The transmission mechanism is characterized by comprising a first gear shaft, a second gear shaft, a primary planetary mechanism and a secondary planetary mechanism,
the first gear shaft is in transmission connection with the second gear shaft,
the second gear shaft is in transmission connection with the primary planetary mechanism,
and the primary planetary mechanism is in transmission connection with the secondary planetary mechanism.
2. The transmission mechanism as claimed in claim 1, wherein a first fixed gear is provided on the first gear shaft, a second fixed gear is provided on the second gear shaft, and the first fixed gear meshes with the second fixed gear.
3. The transmission mechanism as claimed in claim 2, wherein the primary planetary mechanism comprises a primary sun gear, a primary planet gear, a primary ring gear and a primary planet carrier, and the second gear shaft is fixedly connected to the primary sun gear.
4. A transmission as claimed in claim 3, wherein the secondary epicyclic comprises a secondary sun gear, a secondary planet gear, a secondary annulus gear and a secondary planet carrier, the primary planet carrier being fixedly connected to the secondary sun gear.
5. A transmission mechanism as claimed in claim 4, wherein the secondary planet carrier extends axially to form the output shaft.
6. The transmission mechanism as recited in claim 5, wherein the second gear shaft, the primary sun gear, the primary planet carrier, the secondary sun gear, the secondary planet carrier, and the output shaft are all coaxial.
7. The wheel rim electric driving system is characterized by comprising an electric motor, a transmission mechanism, a fixed shell and a braking unit, wherein the electric motor is connected to the transmission mechanism, the transmission mechanism is installed in the fixed shell, and the braking unit is installed on the transmission mechanism;
the transmission mechanism comprises a first gear shaft, a second gear shaft, a primary planetary mechanism and a secondary planetary mechanism, wherein the first gear shaft is in transmission connection with the second gear shaft, the second gear shaft is in transmission connection with the primary planetary mechanism, and the primary planetary mechanism is in transmission connection with the secondary planetary mechanism.
8. The wheel-edge electric drive system of claim 7, wherein a first fixed gear is disposed on the first gear shaft, a second fixed gear is disposed on the second gear shaft, and the first fixed gear is meshed with the second fixed gear; the primary planetary mechanism comprises a primary sun gear, a primary planet gear, a primary gear ring and a primary planet carrier, and the second gear shaft is fixedly connected to the primary sun gear; the secondary planetary mechanism comprises a secondary sun gear, a secondary planet gear, a secondary gear ring and a secondary planet carrier, and the primary planet carrier is fixedly connected to the secondary sun gear; and the secondary planet carrier axially extends to form an output shaft.
9. The wheel-side electric drive system of claim 8, wherein the second gear shaft, the primary sun gear, the primary planet carrier, the secondary sun gear, the secondary planet carrier, and the output shaft are all coaxial.
10. A wheel-side electric drive system as claimed in claim 7, wherein the primary planet carrier is mounted to the secondary sun gear by a fixed coupling.
11. The wheel-side electric drive system according to claim 10, wherein the brake unit includes a rotor plate and a stator plate, the rotor plate being mounted on the second gear shaft, the primary carrier, the fixed connecting shaft, the secondary carrier, or the output shaft, the stator plate being configured to be capable of press-fitting with the rotor plate, the stator plate being mounted on the fixed housing.
CN202210720347.8A 2022-06-23 2022-06-23 Transmission mechanism and wheel-side electric drive system Pending CN114953984A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210720347.8A CN114953984A (en) 2022-06-23 2022-06-23 Transmission mechanism and wheel-side electric drive system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210720347.8A CN114953984A (en) 2022-06-23 2022-06-23 Transmission mechanism and wheel-side electric drive system

Publications (1)

Publication Number Publication Date
CN114953984A true CN114953984A (en) 2022-08-30

Family

ID=82964934

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210720347.8A Pending CN114953984A (en) 2022-06-23 2022-06-23 Transmission mechanism and wheel-side electric drive system

Country Status (1)

Country Link
CN (1) CN114953984A (en)

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