CN117141223A - Electric drive axle structure and electric drive axle - Google Patents

Abstract

The application relates to an electric drive axle structure, which comprises a first rotary driving piece, an intermediate shaft, a first output shaft, a gear shifting assembly, a second rotary driving piece and a second output shaft, wherein the intermediate shaft is in transmission connection with the first rotary driving piece, a first gear shifting auxiliary rotating piece is fixedly sleeved on the first output shaft, a gear shifting main rotating piece is fixedly sleeved on the intermediate shaft, the first gear shifting auxiliary rotating piece and the gear shifting main rotating piece are arranged in pairs, at least two gear shifting auxiliary rotating pieces are arranged, the gear shifting assembly is used for realizing transmission connection and transmission separation of one pair of the first gear shifting auxiliary rotating pieces and the gear shifting main rotating piece, the output end of the second rotary driving piece is in transmission connection with the second output shaft, and the first output shaft and the second output shaft are respectively in transmission connection with a differential mechanism and are used for providing power for the differential mechanism, so that the power is not interrupted in the whole gear shifting process, the driving feeling of a driver is increased, the ramp sliding risk of the driver in the gear shifting process is reduced, and the personal safety of the driver is increased.

Description

Electric drive axle structure and electric drive axle

Technical Field

The application relates to the technical field of vehicle driving systems, in particular to an electric drive axle structure and an electric drive axle.

Background

The electric drive axle is an electromechanical integrated drive system designed for automobiles and has the advantages of high integration degree, small volume, low energy consumption and the like. The existing electric drive bridge mainly adapts to 'gear positions' under different running speeds through a speed change structure arranged in the electric drive bridge, so that a plurality of different rotating speeds or torque conversion ratios are realized.

However, when the conventional commercial vehicle electric drive bridge structure executes a gear shifting action, the clutch is usually required to interrupt power transmission, and then the gear shifting action can be continued, so that on one hand, the driving feeling of a driver is reduced, on the other hand, when the driver performs the gear shifting action on a ramp, the risk of sliding the ramp is easily caused in the gear shifting process due to the heavy weight of the commercial vehicle, and the personal safety of the driver can be even jeopardized in serious cases.

Disclosure of Invention

Based on this, it is necessary to provide an electric drive axle structure and an electric drive axle for the problem that the electric drive axle needs to interrupt the power transmission at the time of gear shifting.

An electric drive axle structure comprising:

a first rotary drive member; and

the intermediate shaft is in transmission connection with the first rotary driving piece;

the first output shaft is fixedly sleeved with a first gear shifting auxiliary rotating member, the intermediate shaft is fixedly sleeved with a gear shifting main rotating member, the first gear shifting auxiliary rotating member and the gear shifting main rotating member are arranged in pairs, and at least two first gear shifting auxiliary rotating members are arranged;

the gear shifting assembly is used for realizing transmission connection and transmission separation of one pair of the first gear shifting auxiliary rotating piece and the gear shifting main rotating piece;

the second rotary driving piece and the second output shaft are in transmission connection, and the first output shaft and the second output shaft are respectively in transmission connection with the differential mechanism and are used for providing power for the differential mechanism.

In one embodiment, the output end of the second rotary driving member is fixedly sleeved with a second main rotating member, the second output shaft is fixedly sleeved with a second auxiliary rotating member, and the second auxiliary rotating member is meshed with the second main rotating member.

In one embodiment, the shift assembly is slidingly connected with the intermediate shaft or the first output shaft in an axial direction.

In one embodiment, the shift assembly includes:

the gear shifting actuator is in sliding connection with the intermediate shaft or the first output shaft;

a gear shifting fork which is movably arranged on the gear shifting actuator along a second direction with the gear shifting actuator;

each pair of the shift main rotating member and the first shift auxiliary rotating member are provided with a clearance along the second direction, and the shift fork is used for providing pressure for pressing the shift main rotating member to the first shift auxiliary rotating member so as to connect the shift main rotating member and the shift auxiliary rotating member in a transmission way.

The application also provides an electric drive axle comprising:

the electric drive axle structure

The differential mechanism is provided with two power input ends, two power input ends respectively with first output shaft, second output shaft connection, the differential mechanism is provided with the axletree, the fixed cover in axletree both sides is equipped with the wheel.

In one embodiment, the differential mechanism comprises a differential housing, two driven rotating members are arranged on the differential housing, a first output rotating member is fixedly sleeved on the first output shaft, a second output rotating member is fixedly sleeved on the second output shaft, and the two driven rotating members are respectively in transmission connection with the first output rotating member and the second output rotating member.

In one embodiment, the differential further comprises:

the planetary shaft is fixedly connected with the differential shell;

the planetary bevel gear is rotationally connected with the planetary shaft;

the driving bevel gear comprises at least two driving bevel gears, each axle comprises a left half axle and a right half axle, the two driving bevel gears are respectively and fixedly sleeved on one end of each left half axle and one end of each right half axle, the driving bevel gears are respectively and fixedly connected with the planetary bevel gears in a transmission manner, and wheels are fixedly sleeved on the other ends of the left half axles and the right half axles.

In one embodiment, the first rotary driving member and the second rotary driving member are provided separately on the other two sides of the axle.

In one embodiment, the electric drive axle further comprises a cooling structure comprising:

an oil supply member; and

the oil pipe comprises a first oil pipe, wherein a heat exchange piece is arranged in the first oil pipe, one end of the first oil pipe is communicated with the oil supply piece, the other end of the first oil pipe is communicated with the electric drive axle structure, and a filter assembly is arranged in the first oil pipe and is used for filtering impurities in oil;

and one end of the circulating oil pipe is communicated with the electric drive axle structure, and the other end of the circulating oil pipe is communicated with the oil supply piece.

In one embodiment, the cooling structure further comprises a second oil pipe, one end of the second oil pipe is communicated with the first rotary driving piece and/or the second rotary driving piece, the other end of the second oil pipe is communicated with the first oil pipe, a detection piece and a control valve are arranged in the second oil pipe, the detection piece is used for detecting the temperature and/or the pressure of the oil liquid, and the control valve is used for adjusting the oil pressure of the second oil pipe.

According to the electric drive axle structure, the first output shaft and the second output shaft are respectively in transmission connection with the differential mechanism, so that the first output shaft and the second output shaft can both provide power for the differential mechanism, when a gear shifting operation is executed, the gear shifting assembly is used for separating a pair of a gear shifting main rotating piece and a gear shifting auxiliary rotating piece which are in transmission, and the power on the first output shaft is interrupted when the gear shifting operation is ensured; the second rotary driving piece can still directly transmit the power of the second rotary driving piece to the second output shaft, so that the second output shaft still has the power output capability, the power is not interrupted in the whole gear shifting process, the driving feeling of a driver is increased, the ramp car sliding risk in the gear shifting process is reduced, and the personal safety of the driver is guaranteed.

Drawings

Fig. 1 is a schematic structural diagram of an electrically driven bridge structure according to an embodiment of the application.

Fig. 2 is a partial enlarged view at a in fig. 1.

Fig. 3 is a schematic structural diagram of an electrically driven bridge structure according to another embodiment of the present application.

Fig. 4 is a partial enlarged view at B in fig. 3.

Fig. 5 is a system diagram of a cooling structure according to an embodiment of the present application.

Reference numerals:

100. an electric drive axle structure; 10. a bridge housing; 20. a first rotary drive member; 210. a first input shaft; 211. a first main rotation member; 30. an intermediate shaft; 31. a first auxiliary rotating member; 32. a first shift main rotation member; 33. a second shift main rotation member; 40. a first output shaft; 41. a first shift pair rotating member; 42. a second shift pair rotating member; 43. a first output rotating member; 50. a shift assembly; 510. a shift fork; 520. a shift actuator; 60. a second rotary driving member; 610. a second input shaft; 611. a second main rotation member; 70. a second output shaft; 71. a second secondary rotating member; 72. a second output rotating member; 80. an axle; 810. a left half shaft; 820. a right half shaft; 81. a wheel; 830. driving a bevel gear; 90. a differential; 910. a differential housing; 911. a passive rotating member; 920. a planetary shaft; 921. a planetary bevel gear; 201. an oil supply member; 201a, an oil pan; 201b, an oil pump; 202. a heat exchange member; 203. a first oil pipe; 204. a second oil pipe; 205. a filter assembly; 205a, a first filter; 205b, a second filter; 206. a circulation oil pipe; 2071. a temperature sensor; 2072. a pressure sensor; 208. and a control valve.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

In the description of the present application, it should be understood that, if any, these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., are used herein with respect to the orientation or positional relationship shown in the drawings, these terms refer to the orientation or positional relationship for convenience of description and simplicity of description only, and do not indicate or imply that the apparatus or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In the present application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The engine, the gearbox and the axle are three main power core assemblies of the truck, and the axle is not mentioned as the engine and the gearbox, but plays a role of a tie in the power transmission process of the automobile, so that the dynamic property and the stability of the whole automobile are important, and the function of the existing commercial automobile axle is to transmit acting forces and moment between a frame (or a bearing type automobile body) and wheels in all directions, so that the dynamic property, the stability, the bearing capacity and other performances of the automobile are greatly influenced.

The existing drive axle generally comprises a speed reducer, a differential mechanism, wheels, an axle housing and the like, wherein the speed reducer is responsible for transmitting the rotating speed and torque of a motor to the differential mechanism; the differential mechanism is responsible for decoupling the wheels at two sides when the automobile turns, so that the non-constant speed rotation of the two wheels is realized, and the integral stability of the commercial vehicle is ensured.

However, the applicant found that in the case of a gear change of the conventional electric drive axle, it is usually necessary for a driver to step on a clutch pedal to control the clutch to separate the speed reducer from the differential, so that the gear change of the speed reducer is completed (i.e. a "gear change" in a popular sense (an automatic car-stop type does not have a clutch pedal but requires clutch engagement in the case of gear change), and in the whole process, the separation of the speed reducer from the differential means that the whole car cannot continue to supply power, and the influence caused by the temporary power failure is small for a small-sized car, however, in the case of a large-sized commercial car, a large impact is generated on the gear change actuator due to the slow load of the small-sized car, and the driving feeling of the driver is influenced when the gear change is restarted after the power stop.

Based on this, the applicant has proposed an electric drive axle structure, through motor and the output shaft of extra setting to and the drive gear who sets up on the output shaft for power is uninterrupted in the whole shift process, has both increased driver's driving impression, has also reduced the ramp swift current car risk in the shift process, has increased the guarantee to driver's personal safety.

Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram of an electrically driven bridge structure according to an embodiment of the present application, fig. 2 is a partially enlarged view of a portion a in fig. 1, fig. 3 is a schematic structural diagram of an electrically driven bridge structure according to another embodiment of the present application, fig. 4 is a partially enlarged view of a portion B in fig. 3, and fig. 5 is a system diagram of a cooling structure according to an embodiment of the present application.

Referring to fig. 1 and 2 again, the present application provides an electric drive axle structure 100, which includes a first rotary driving member 20, an intermediate shaft 30, a first output shaft 40, a gear shifting assembly, a second rotary driving member 60 and a second output shaft 70, wherein the intermediate shaft 30 is in transmission connection with the first rotary driving member 20, a first gear shifting auxiliary rotating member 41 is fixedly sleeved on the first output shaft 40, a gear shifting main rotating member is fixedly sleeved on the intermediate shaft 30, the first gear shifting auxiliary rotating member 41 is arranged in pairs with the gear shifting main rotating member, at least two gear shifting auxiliary rotating members 41 are arranged, the gear shifting assembly 50 is used for realizing transmission connection and transmission separation of one pair of the first gear shifting auxiliary rotating members 41 and the gear shifting main rotating members, the output end of the second rotary driving member 60 is in transmission connection with the second output shaft 70, and the first output shaft 40 and the second output shaft 70 are respectively in transmission connection with a differential 90 for providing power for the differential 90.

In the above electric drive axle structure, when a gear shifting operation is performed, the gear shifting assembly 50 is separated from the first gear shifting main rotating member 32, so that power on the first output shaft 40 is interrupted, the second rotary driving member 60 keeps rotating normally, at this time, the second main rotating member 611 drives the second auxiliary rotating member 71 connected with the second main rotating member in a transmission manner to rotate, and further drives the second output shaft 70 to rotate, so that the second output shaft 70 still has power output capability, power is not interrupted in the whole gear shifting process, driving feeling of a driver is increased, ramp sliding risk in the gear shifting process is reduced, and personal safety of the driver is guaranteed.

Optionally, the transmission connection includes a sprocket connection, a gear connection, a pulley connection, and other connection modes capable of transmitting power, and specifically, what connection mode is selected for the transmission connection may be set according to actual use requirements, which is not limited in the present application.

Specifically, in some embodiments, the electric drive axle structure includes an axle housing 10, a first rotary driving member 20, an intermediate shaft 30, a first output shaft 40, and a second rotary driving member 60, where the first rotary driving member 20 is disposed in the axle housing 10, the first rotary driving member 20 is fixedly connected with the axle housing 10, the first rotary driving member 20 is provided with a first input shaft 210, the first input shaft 210 is connected with an output end of the first rotary driving member 20, a first main rotating member 211 is fixedly sleeved on the first input shaft 210, the intermediate shaft 30 is disposed in the axle housing 10, and a first auxiliary rotating member 31 is fixedly sleeved on the intermediate shaft 30; the first auxiliary rotating member 31 is in transmission connection with the first main rotating member 211, the first output shaft 40 is fixedly sleeved with the first auxiliary shifting rotating member 41 and the second auxiliary shifting rotating member 42, the intermediate shaft 30 is fixedly sleeved with the first main shifting rotating member 32 and the second main shifting rotating member 33, the electric drive axle structure further comprises a shifting assembly 50, the shifting assembly 50 is used for realizing transmission connection and separation of the first main shifting rotating member 32 and the first auxiliary shifting rotating member 41, the second main shifting rotating member 33 and the second auxiliary shifting rotating member 42 are in transmission connection and separation, the second rotary driving member 60 is arranged in the axle housing 10, the second rotary driving member 60 is fixedly connected with the axle housing 10, the second rotary driving member 60 is provided with a second input shaft 610, the second input shaft 610 is fixedly sleeved with the second main shifting rotating member 611, the electric drive axle structure further comprises a second output shaft 70, the second output shaft 70 is fixedly sleeved with the second auxiliary rotating member 71, and the second auxiliary rotating member 71 and the second main rotating member 611 are in transmission connection.

Referring to fig. 1 and 2 again, in some embodiments, a second main rotating member 611 is fixedly sleeved on an output end of the second rotary driving member 60, and a second auxiliary rotating member 71 is fixedly sleeved on the second output shaft 70, where the second auxiliary rotating member 71 is in driving connection with the second main rotating member 611.

Optionally, the rotating member includes gears, sprockets, turbines, and other elements capable of driving connections and completing rotational movement, and in particular, in some embodiments, the rotating member is configured as gears through which the transmission of power and torque to each other is accomplished, such that the transmission between the shafts is more stable and less prone to damage.

Specifically, the transmission connection between the second output shaft 70 and the output end of the second rotary driving member 60 is completed through the first main rotary member 211 and the second auxiliary rotary member 71, so that the second rotary driving member 60 can directly transmit power to the differential 90, and the second rotary driving member 60 can still provide power to the differential 90 when the first rotary driving member 20 is in the power interruption shift state.

Referring again to fig. 1 and 3, in some embodiments, the shift assembly 50 is slidably coupled to the intermediate shaft 30 or the first output shaft 40 in an axial direction.

Alternatively, the shift assembly 50 may be slidably coupled to the intermediate shaft 30 and also slidably coupled to the first output shaft 40, and in some embodiments, the shift assembly 50 may also be slidably coupled to both; by slidably connecting the shift assembly 50 with the intermediate shaft 30 and/or the first output shaft 40, the rotational speed of the shift assembly 50 is closer to the rotational speed of the vehicle drive shaft at this time than if the shift assembly is disposed on the first input shaft 210, so that the transient variation in torque transmission of the powertrain during normal shifting is smaller, and the power shock at the moment of shifting is further reduced.

Referring again to fig. 3 and 4, in some embodiments, the shift assembly 50 includes a shift actuator 520 and a shift fork 510, the shift actuator 520 is slidably connected to the intermediate shaft 30 and/or the first output shaft 40, the shift fork 510 is disposed at two ends of the shift actuator, the shift fork 510 is movably mounted on the shift actuator 520 along a second direction with the shift actuator 520, each pair of the shift main rotating member and the first shift auxiliary rotating member 41 is provided with a gap along the second direction, and the shift fork 510 is used for providing a pressure for pressing the shift main rotating member against the first shift auxiliary rotating member 41 so as to drivingly connect the shift main rotating member and the shift auxiliary rotating member.

Specifically, the first shift main rotor 32 and the first shift sub rotor 41 are provided with a clearance, the shift fork 510 is provided with a shift fork for providing a pressure for pressing the first shift main rotor 32 against the first shift sub rotor 41 to drivingly connect the first shift main rotor 32, the first shift sub rotor 41, and/or the second shift main rotor 33 and the second shift sub rotor 42 are provided with a clearance, and the shift fork 510 is provided with a shift fork for providing a pressure for pressing the second shift main rotor 33 against the second shift sub rotor 42 to drivingly connect the second shift main rotor 33, the second shift sub rotor 42.

Further, when a gear shift is required, after the gear shift actuator 520 receives a voltage signal for executing a gear shift, the gear shift actuator 520 drives the gear shift fork 510 to move along the axial direction, in some embodiments, the gear shift fork 510 is further provided with a gear shift sleeve made of a soft material, and by arranging the gear shift sleeve, gear shift impact caused during gear shift is reduced; further, when the shift fork 510 moves along the axial direction, the shift sleeve is driven to move horizontally, and the shift sleeve moves toward the first shift main rotating member 32 and presses the transmission connection tooth portion of the first shift main rotating member 32 toward the transmission connection tooth portion of the first auxiliary rotating member 31, and when the neutral gear command is executed, the shift actuator 520 drives the shift fork 510 and the shift sleeve to move in opposite directions until the first shift auxiliary rotating member 41 is disengaged from the first shift main rotating member 32. Through the setting of above-mentioned gearshift subassembly 50 for the whole gearshift impact that bears is littleer, is favorable to promoting driver's driving experience.

Referring to fig. 1 and 2 again, in some embodiments, the present application further provides an electric drive axle, which includes the electric drive axle structure 100 and the differential 90, wherein the differential 90 is provided with two power input ends, the two power input ends are respectively connected with the first output shaft 40 and the second output shaft 70, the differential 90 is provided with an axle 80, and wheels 81 are fixedly sleeved on two sides of the axle 80.

Specifically, the axle 80 is disposed in the axle housing 10, the first output shaft 40 and the second output shaft 70 are used for driving the differential 90 to rotate, so as to drive the axle 80 to rotate, and wheels 81 are respectively and fixedly sleeved at two ends of the axle 80. Through differential 90 and the setting of axletree 80 for electric drive axle structure can be direct with moment of torsion transmission for wheel 81, and drive wheel 81 rotation, make electric drive axle structure can directly repack on current drive axle structure, be favorable to electric drive axle structure's large-scale use and production to arrange.

Referring again to fig. 1 and 3, in some embodiments, the first rotary driving member 20, the first output shaft 40, the intermediate shaft 30, and the first output shaft 40 form a first balance assembly; the second rotary drive member 60, the second input shaft 610, and the second output shaft 70 form a second plane Heng Zujian, and the first and second balancing units are disposed on either side of the axle 80.

Specifically, by disposing the first and second balancing assemblies on both sides of the axle 80, the weight balance of the electric drive axle structure is achieved through the first and second balancing assemblies and the left and right wheels 81, and the tilting and uneven stress of the electric drive axle is reduced.

Referring to fig. 1 and 2 again, in some embodiments, the electric drive axle structure further includes a differential 90, the differential 90 is disposed in the axle housing 10, the differential 90 includes a differential housing 910, a passive rotating member 911 is disposed on the differential housing 910, a first output rotating member 43 is fixedly sleeved on the first output shaft 40, a second output rotating member 72 is fixedly sleeved on the second output shaft 70, and the passive rotating member 911 is respectively in transmission connection with the first output rotating member 43 and the second output rotating member 72.

Optionally, the rotating member includes gears, sprockets, turbines, and other elements capable of driving connections and completing rotational movement, and in particular, in some embodiments, the rotating member is configured as gears through which the transmission of power and torque to each other is accomplished, such that the transmission between the shafts is more stable and less prone to damage.

Specifically, the first output rotating member 43 is fixedly sleeved on the first output shaft 40, the second output rotating member 72 is fixedly sleeved on the second output shaft 70, and the passive rotating member 911 is respectively connected with the first output rotating member 43 and the second output rotating member 72 in a transmission manner, so that the first output shaft 40 and the second output shaft 70 can transmit torque to the passive rotating member 911 in the rotating process, the passive rotating member 911 can drive the differential housing 910 to rotate together, and the axle 80 is driven to rotate together through the differential housing 910, so that the purposes of transmitting torque and power of the rotating driving member to the wheels 81 and driving the wheels 81 to advance are achieved.

Referring to fig. 1 and 2 again, in some embodiments, the differential 90 further includes a planetary shaft 920, a planetary bevel gear 921 and a driving bevel gear 830, the planetary shaft 920 is fixedly connected with the differential housing 910, the planetary bevel gear 921 is rotationally connected with the planetary shaft 920, the driving bevel gear 830 includes at least two, the axle 80 includes a left half shaft 810 and a right half shaft 820, the two driving bevel gears 830 are respectively fixedly sleeved at one ends of the left half shaft 810 and the right half shaft 820, the driving bevel gear 830 is respectively in driving connection with the planetary bevel gear 921, the wheels 81 include at least two, and the two wheels 81 are respectively disposed at the other sides of the left half shaft 810 and the right half shaft 820. Specifically, when the automobile is traveling straight, the two planetary bevel gears 921 revolve around the center of the differential 90 only, and when the automobile is required to turn, the planetary bevel gears 921 revolve around the center of the differential 90 and rotate around the center of rotation thereof, and since the directions of rotation are not the same, taking the left turn of the automobile as an example, the left half shaft 810 drives the bevel gears 830 = the speed of the differential housing 910-the speed of the planetary bevel gears 921 (revolution), and the right half shaft 820 drives the bevel gears 830 = the speed of the differential housing 910 + the speed of the planetary bevel gears 921 (revolution), thereby ensuring that the speeds of the right wheels 81 are higher than the speeds of the left wheels 81 when the two wheels 81 are rotating, helping to achieve smooth traveling when turning.

Referring again to FIG. 1, in some embodiments, the axle housing 10 includes a unitary axle housing and a segmented cast axle housing. Specifically, the integral axle housing is adopted, so that the modification of the electric drive axle structure can be realized in the existing electric drive axle, and the arrangement and the use of the electric drive axle structure are facilitated; the sectional casting axle housing is adopted, so that the integrated and optimized design of the axle housing can be realized, and the use and occupied space of the axle housing are saved.

Referring to fig. 5 again, the electric drive axle provided by the present application further includes a cooling structure, wherein the cooling structure is used for cooling the electric drive axle structure, in some embodiments, the cooling structure includes an oil supply member 201, a first oil pipe 203 and a circulating oil pipe 206, the first oil pipe 203 is provided with a heat exchange member 202, one end of the first oil pipe 203 is communicated with the oil supply member 201, the other end of the first oil pipe 203 is communicated with the electric drive axle structure, a filter assembly 205 is provided in the first oil pipe 203, the filter assembly 205 is used for filtering oil impurities, one end of the circulating oil pipe 206 is communicated with the electric drive axle structure, and the other end of the circulating oil pipe 206 is communicated with the oil supply member 201.

Optionally, the oil supply member 201 includes an oil pump 201b, an oil supply pipe and other elements capable of supplying oil, and the specific choice of which oil supply member 201 can be set according to the actual use requirement, which is not limited in the present application; optionally, the heat exchange member 202 includes a heat exchanger, a heat exchange unit, a heat exchange plate and other elements capable of performing heat exchange, and the specific choice of which heat exchange member 202 can be set according to actual use requirements, which is not limited in the present application; optionally, the filtering component 205 includes a filter element, a filter screen, a filter, and other elements capable of filtering oil, and the specific filtering component 205 may be selected and set according to the actual requirement, which is not limited in the present application.

Specifically, in one embodiment, the oil supply member 201 includes an oil pan 201a and an oil supply pump 201b, the filter assembly 205 includes a first filter member 205a and a second filter member 205b, the first filter member 205a is used for fine filtration, the second filter member 205b is used for coarse filtration of oil, in one embodiment, the first filter member 205a is configured as a filter screen and the second filter member 205b is configured as a filter core, the cooling oil in the oil pan 201a is sucked through the oil supply member 201, under the action of suction force, impurities are filtered through the filter screen, pass through the first oil pipe 203, enter into the elements of the electric drive axle structure, cool the electric drive axle structure, and circulate the oil through the circulating oil pipe 206, and through the arrangement of the cooling device, the cooling device can directly use the lubricating oil for cooling, and can also provide lubrication while cooling, so that the electric drive axle does not need to additionally provide a lubrication pipeline, and the structure of the electric drive axle is simplified.

Referring again to fig. 5, in some embodiments, the cooling structure further includes a second oil pipe 204, one end of the second oil pipe 204 is in communication with the first rotary driving member 20 and/or the second rotary driving member 60, the other end of the second oil pipe 204 is in communication with the oil supply member 201, a detecting member for detecting the temperature and/or pressure of the oil and a control valve 208 are disposed in the second oil pipe 204, and the control valve 208 is used for adjusting the oil pressure of the second oil pipe 204.

Specifically, the cooling oil lubricates and cools the position to be cooled through the inside of the first rotary driving member 20 and the second rotary driving member 60, then the cooling oil heated by the rotary driving members enters the heat exchange member 202 again, the cooled cooling oil is conveyed to other elements of the electric drive axle structure through oil-water heat exchange of the heat exchanger, the positions of the parts to be lubricated, such as gears and bearings, inside the electric drive axle are lubricated and cooled, and naturally flows back to the oil pan 201a after lubrication is completed, so that lubrication and cooling circulation of the cooling oil is realized. Wherein, the detection piece is optionally arranged, and comprises a temperature sensor 2071 or a pressure sensor 2072, which can monitor the oil temperature and the liquid pressure in the pipeline or the oil duct in real time and provide a pipeline blockage alarm; optionally, a control valve 208 may be provided to return high pressure fluid to sump 201a via a specially configured passage when the pressure of the fluid in the conduit is blocked to exceed a certain pressure limit.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the application, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of protection of the present application is to be determined by the appended claims.

Claims (10)

1. An electric drive axle construction, characterized in that the electric drive axle construction (100) comprises:

a first rotary drive (20); and

an intermediate shaft (30), the intermediate shaft (30) being in driving connection with the first rotary drive (20);

the gear shifting device comprises a first output shaft (40), wherein a first gear shifting auxiliary rotating member (41) is fixedly sleeved on the first output shaft (40), a first gear shifting main rotating member (32) is fixedly sleeved on the intermediate shaft (30), the first gear shifting auxiliary rotating member (41) and the first gear shifting main rotating member (32) are arranged in pairs, and at least two first gear shifting auxiliary rotating members (41) are arranged;

a shift assembly (50), wherein the shift assembly (50) is used for realizing transmission connection and separation of a pair of the first shift auxiliary rotating members (41) and the first shift main rotating member (32);

the second rotary driving piece (60) and the second output shaft (70), second rotary driving piece (60) output with second output shaft (70) transmission connection, first output shaft (40) with second output shaft (70) respectively with differential mechanism (90) transmission connection for provide power for differential mechanism (90).

2. The electric drive axle structure according to claim 1, wherein a second main rotating member (611) is fixedly sleeved on the output end of the second rotary driving member (60), a second auxiliary rotating member (71) is fixedly sleeved on the second output shaft (70), and the second auxiliary rotating member (71) is in transmission connection with the second main rotating member (611).

3. The electric drive axle arrangement according to claim 1, characterized in that the gear shift assembly (50) is slidingly connected with the intermediate shaft (30) or the first output shaft (40) in an axial direction.

4. An electric drive axle construction according to claim 3, characterized in that the gear shifting assembly (50) comprises:

a shift actuator (520), the shift actuator (520) being slidingly connected to the intermediate shaft (30) or the first output shaft (40);

a shift fork (510), wherein the shift fork (510) is arranged on the shift actuator (520) and can be movably arranged on the shift actuator (520) along a second direction;

each pair of the first gear shifting main rotating member (32) and the first gear shifting auxiliary rotating member (41) is provided with a clearance along the second direction, and the gear shifting fork is used for providing pressure for pressing the first gear shifting main rotating member (32) to the first gear shifting auxiliary rotating member (41) so as to connect the first gear shifting main rotating member (32) and the gear shifting auxiliary rotating member (41) in a transmission mode.

5. An electric drive axle, comprising:

the electric drive axle structure (100) of any one of claims 1-4; and

differential mechanism (90), differential mechanism is provided with two power input, two power input respectively with first output shaft (40) second output shaft (70) are connected, differential mechanism (90) is provided with axletree (80), axletree (80) both sides fixed cover is equipped with wheel (81).

6. The electric drive axle according to claim 5, characterized in that the differential (90) comprises a differential housing (910), two passive rotating members (911) are respectively arranged on the differential housing (910), a first output rotating member (43) is fixedly sleeved on the first output shaft (40), a second output rotating member (72) is fixedly sleeved on the second output shaft (70), and the two passive rotating members (911) are respectively in transmission connection with the first output rotating member (43) and the second output rotating member (72).

7. The electric drive axle of claim 6, wherein the differential (90) further comprises:

the planetary shaft (920), the planetary shaft (920) is fixedly connected with the differential shell (910);

a planetary bevel gear (921), the planetary bevel gear (921) being rotatably connected to the planetary shaft (920);

the driving bevel gear (830), driving bevel gear (830) includes two at least, axletree (80) are including left semi-axis (810) and right semi-axis (820), two driving bevel gear (830) are fixed the cover respectively and are established left semi-axis (810) with right semi-axis (820) one end, driving bevel gear (830) respectively with planetary bevel gear (921) transmission connection, left semi-axis (810) with the fixed cover of right semi-axis (820) other end is equipped with wheel (81).

8. The electric drive axle of claim 5, wherein the first rotary drive member (20) and the second rotary drive member (60) are disposed on opposite sides of the axle (80).

9. The electric drive axle of any one of claims 5-8, further comprising a cooling structure comprising:

an oil supply member (201); and

the oil supply device comprises a first oil pipe (203), wherein the first oil pipe (203) is provided with a heat exchange piece (202), one end of the first oil pipe (203) is communicated with the oil supply piece (201), the other end of the first oil pipe (203) is communicated with the electric drive axle structure (100), a filter assembly (205) is arranged in the first oil pipe (203), and the filter assembly (205) is used for filtering impurities in oil;

and one end of the circulating oil pipe (206) is communicated with the electric drive axle structure (100), and the other end of the circulating oil pipe (206) is communicated with the oil supply piece (201).

10. The electric drive axle according to claim 9, characterized in that the cooling structure further comprises a second oil pipe (204), one end of the second oil pipe (204) is communicated with the first rotary driving member (20) and/or the second rotary driving member (60), the other end of the second oil pipe (204) is communicated with the first oil pipe (203), a detecting member and a control valve are arranged in the second oil pipe (204), the detecting member is used for detecting the temperature and/or the pressure of the oil, and the control valve is used for adjusting the oil pressure of the second oil pipe (204).