Power takeoff driving device based on electric drive axle

Abstract

The utility model discloses a power takeoff driving device based on an electric drive axle, which relates to the technical field of automobile axles and structurally comprises a motor, an electromagnetic clutch and a power takeoff oil pump, the motor, the electromagnetic clutch and the power takeoff oil pump are sequentially and coaxially arranged, an oil inlet is formed in the top of the power takeoff oil pump, and an oil outlet is formed in the bottom of the power takeoff oil pump. A transmission is arranged on one side of the motor, and an input shaft is arranged on the bottom side of the transmission. According to the electric drive axle, the driving force is directly connected to the outer side of the motor of the electric drive axle, the electromagnetic clutch is used for directly transmitting the power to the power take-off oil pump, the driving force of the electric drive axle is formed, complex connection modes such as multi-stage gears are not needed, the transmission route of the driving force can be shorter, and the transmission efficiency of the driving force is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile axle, concretely is a kind of power take-off drive device based on electric drive axle. BACKGROUND

[0002] With the rapid development of new energy vehicles and electric technology, electric drive axle as a kind of efficient, compact power transmission system, in electric commercial vehicle, logistics vehicle and special vehicle have been widely used.Electric drive axle by integrating motor, reducer and differential together, directly drive wheel, significantly improve transmission efficiency and energy utilization rate.However, in certain special vehicles or engineering vehicles, in addition to the need to drive vehicle travel, also need to provide power for hydraulic system or other auxiliary equipment, for example, the lifting device of self-unloading vehicle, the cleaning equipment of sanitation vehicle or the mixing tank of mixer, etc., these equipment usually need to be driven by the additional power output of power take-off.

[0003] The existing power take-off drive device based on electric drive axle, the power take-off on traditional electric drive axle usually relies on the power output of internal combustion engine, without integrated drive oil pump, usually through multi-stage gear or multiple other mechanical connection mode transmission to drive hydraulic pump or other equipment, motor to power take-off oil pump transmission path is long, and efficiency is low. UTILITY MODEL CONTENTS

[0004] (I) technical problem solved

[0005] In view of the deficiencies of prior art, the utility model provides a kind of power take-off drive device based on electric drive axle, solve the problem that the power take-off on traditional electric drive axle usually relies on the power output of internal combustion engine, without integrated drive oil pump, usually through multi-stage gear or multiple other mechanical connection mode transmission to drive hydraulic pump or other equipment, motor to power take-off oil pump transmission path is long, and efficiency is low.

[0006] (II) technical scheme

[0007] In order to achieve the above object, the utility model discloses a kind of based on electric drive axle's power take-off drive device, including motor, electromagnetic clutch and power take-off pump, the motor, electromagnetic clutch and power take-off pump are coaxially sequentially arranged, the top of the power take-off pump is equipped with oil inlet, the bottom of the power take-off pump is equipped with oil outlet, one side of the motor is provided with transmission, the bottom side of the transmission is provided with input shaft, the input shaft is connected with the transmission by spline, the top side of the input shaft is provided with intermediate shaft, the surface of the intermediate shaft is fixedly connected with secondary driving gear, the top side of the intermediate shaft is provided with differential assembly, the bottom side of the differential assembly is provided with secondary driven gear, the secondary driven gear and secondary driving gear are engaged with each other, the differential assembly is connected with axle half by spline transmission on both sides, one end of two axle halves is fixedly connected with wheel, transmission assembly is commonly arranged between the input shaft and intermediate shaft, power take-off pump is directly connected on one side of motor, power is directly transmitted to power take-off pump by electromagnetic clutch, forms the driving force of electric drive axle, transmission route is short, transmission efficiency is high, whether wheel rotation can be realized and the size of rotational speed is realized through transmission assembly.

[0008] Preferably, the intermediate shaft and the input shaft are arranged in parallel, and the axle half and the intermediate shaft are arranged in parallel.

[0009] Preferably, the transmission assembly comprises a first input gear and a second input gear, and the first input gear and the second input gear are fixedly connected to the surface of the input shaft.

[0010] Preferably, the surface of the intermediate shaft is fixedly connected with a first driven gear and a second driven gear, the first driven gear is engaged with the first input gear, and the second driven gear is engaged with the second input gear.

[0011] Preferably, the surface of the intermediate shaft is fixedly connected with a gear shift switch, and the gear shift switch is located between the first driven gear and the second driven gear.

[0012] Preferably, the secondary driving gear is located on one side of the second driven gear, and whether wheel rotation can be realized and the size of rotational speed is realized through the transmission assembly.

[0013] (Three) beneficial effects

[0014] The utility model provides a kind of based on electric drive axle's power take-off drive device. It has the following beneficial effects:

[0015] (I), the electric drive bridge based on the power takeoff drive device, through the motor outside the electric drive bridge directly coaxial connection driving force, using electromagnetic clutch, power is directly transmitted to the power takeoff pump, form the electric drive bridge drive, without complex connection mode such as multistage gear, and can make the transmission route of driving force shorter, improve the transmission efficiency of driving force.

[0016] (II), the electric drive bridge based on the power takeoff drive device, through the motor on one side by electromagnetic clutch directly connected to the power takeoff pump structure, reduce the complex gear transmission, structure is simpler, thereby reducing the space occupied, the overall frame reduces the burden, and more easily for maintenance personnel to overhaul, improve the overhaul efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the overall structure principle schematic view of the utility model;

[0018] Fig. 2 It is the structure schematic view of the transmission assembly of the utility model.

[0019] In the figure: 1, motor; 2, electromagnetic clutch; 3, power takeoff pump; 4, oil inlet; 5, oil outlet; 6, transmission; 7, input shaft; 8, intermediate shaft; 9, two-stage driving gear; 10, differential assembly; 11, two-stage driven gear; 12, half shaft; 13, wheel; 14, transmission assembly; 141, first gear input gear; 142, second gear input gear; 143, first gear driven gear; 144, second gear driven gear; 145, gear shift switch. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0021] Reference Figs. 1-2The utility model provides a technical scheme: a kind of power takeoff drive based on electric drive bridge, its structure includes motor 1, electromagnetic clutch 2 and power takeoff oil pump 3, motor 1, electromagnetic clutch 2 and power takeoff oil pump 3 are coaxially arranged in turn, the top of power takeoff oil pump 3 is equipped with oil inlet 4, the bottom of power takeoff oil pump 3 is equipped with oil outlet 5, one side of motor 1 is provided with transmission 6, the bottom side of transmission 6 is provided with input shaft 7, motor 1 is connected by spline with the input shaft 7 of transmission 6, the top side of input shaft 7 is provided with intermediate shaft 8, the surface of intermediate shaft 8 is fixedly connected with secondary driving gear 9, the top side of intermediate shaft 8 is provided with differential assembly 10, the bottom side of differential assembly 10 is provided with secondary driven gear 11, secondary driven gear 11 and secondary driving gear 9 are mutually engaged, differential assembly 10 is drivenly connected with axle half 12 on both sides by spline, one end of two axle halves 12 is fixedly connected with wheel 13, transmission assembly 14 is commonly arranged between input shaft 7 and intermediate shaft 8, when electromagnetic clutch 2 works, then motor 1 power is transmitted to power takeoff oil pump 3 through electromagnetic clutch 2, and then power takeoff oil pump 3 works, and low-pressure hydraulic oil is inhaled from the oil inlet 4 of power takeoff oil pump 3, and is converted into high-pressure oil and flows out from the oil outlet 5, to drive the additional power actuator of whole vehicle, if electromagnetic clutch 2 is disconnected, then motor 1 power cannot enter power takeoff oil pump 3, so that the additional power actuator of whole vehicle cannot be driven.

[0022] Wherein, intermediate shaft 8 and input shaft 7 are parallelly arranged, and axle half 12 and intermediate shaft 8 are parallelly arranged.

[0023] Wherein, transmission assembly 14 includes first gear input gear wheel 141 and second gear input gear 142, and the first gear input gear wheel 141 and the second gear input gear 142 are fixedly connected to the surface of the input shaft 7.

[0024] Wherein, the surface of intermediate shaft 8 is fixedly connected with first driven gear 143, and the surface of intermediate shaft 8 is fixedly connected with second driven gear 144, the first driven gear 143 is engagedly connected with the first gear input gear wheel 141, and the second driven gear 144 is engagedly connected with the second gear input gear 142.

[0025] Wherein, the surface of intermediate shaft 8 is fixedly connected with gear shift switch 145, and the gear shift switch 145 is located between the first driven gear 143 and the second driven gear 144. The gear shift switch 145 can realize the conversion of the speed range of wheel 13.

[0026] When the transmission assembly 14 works, first, when the shift switch 145 is closed, the transmission assembly 14 does not work, so that the transmission 6 stops working, and the wheels 13 on both sides of the half shaft 12 do not rotate; when the shift switch 145 is in first gear, the first gear input gear on the input shaft 7 drives the first gear driven gear 143 to rotate, thereby driving the intermediate shaft 8 to rotate, the second level driving gear 9 on the intermediate shaft 8 drives the second level driven gear 11 on the top side to rotate, so that the wheels 13 on both sides of the half shaft 12 rotate at the speed of the first gear; when the shift switch 145 is in second gear, the second gear input gear 142 on the input shaft 7 drives the second gear driven gear 144 to rotate, thereby driving the intermediate shaft 8 to rotate, the second level driving gear 9 on the intermediate shaft 8 drives the second level driven gear 11 on the top side to rotate, so that the wheels 13 on both sides of the half shaft 12 rotate at the speed of the second gear.

[0027] Among them, the second level driving gear 9 is located on one side of the second gear driven gear 144.

[0028] When the electromagnetic clutch 2 works, the motor 1 power is transmitted to the power take-off oil pump 3 through the electromagnetic clutch 2, and then the power take-off oil pump 3 works, low-pressure hydraulic oil is sucked into the oil inlet 4 of the power take-off oil pump 3 and converted into high-pressure oil flowing out of the oil outlet 5, thereby driving the additional power actuator of the whole vehicle, if the electromagnetic clutch 2 is disconnected, the motor 1 power cannot enter the power take-off oil pump 3, thereby the additional power actuator of the whole vehicle cannot be driven, the power take-off works in three cases: parking drive, driving drive, driving no drive;

[0029] Parking drive: At this time, the shift switch 145 of the transmission 6 is in the neutral position, the electromagnetic clutch 2 is in the attracted state, the motor 1 power is transmitted to the power take-off oil pump 3 through the electromagnetic clutch 2, and then the power take-off oil pump 3 works, low-pressure hydraulic oil is sucked into the oil inlet 4 of the power take-off oil pump 3 and converted into high-pressure oil flowing out of the oil outlet 5, thereby driving the additional power actuator of the whole vehicle, realizing parking drive;

[0030] Driving drive: At this time, the shift switch 145 of the transmission 6 is in the gear position, the motor 1 power is transmitted to the wheels 13 through the transmission assembly 14 to drive the vehicle to walk, at the same time, the electromagnetic clutch 2 is in the attracted state, the motor 1 power is transmitted to the power take-off oil pump 3 through the electromagnetic clutch 2, and then the power take-off oil pump 3 works, low-pressure hydraulic oil is sucked into the oil inlet 4 of the power take-off oil pump 3 and converted into high-pressure oil flowing out of the oil outlet 5, thereby driving the additional power actuator of the whole vehicle, realizing driving drive;

[0031] Driving without driving force: at this time, the shift switch 145 of the transmission 6 is in the neutral position, the motor 1 power is transmitted to the wheels 13 through the transmission assembly 14 to drive the vehicle to run, at the same time, the electromagnetic clutch 2 is in the off state, the motor 1 power cannot enter the power take-off oil pump 3, and driving without driving force is realized.

[0032] It should be noted that, in this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

[0033] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An electric drive axle based power take-off drive arrangement comprising an electric machine (1), an electromagnetic clutch (2) and a power take-off oil pump (3), characterized in that: The motor (1), electromagnetic clutch (2) and power oil pump (3) are coaxially arranged in sequence, the top of the power oil pump (3) is provided with an oil inlet (4), the bottom of the power oil pump (3) is provided with an oil outlet (5), one side of the motor (1) is provided with a transmission (6), the bottom side of the transmission (6) is provided with an input shaft (7), the motor (1) is connected with the input shaft (7) of the transmission (6) through spline, the top side of the input shaft (7) is provided with an intermediate shaft (8), the surface of the intermediate shaft (8) is fixedly connected with a secondary driving gear (9), the top side of the intermediate shaft (8) is provided with a differential assembly (10), the bottom side of the differential assembly (10) is provided with a secondary driven gear (11), the secondary driven gear (11) and the secondary driving gear (9) are in mesh with each other, the two sides of the differential assembly (10) are connected with half shafts (12) through spline transmission, one end of the two half shafts (12) is fixedly connected with wheels (13), the input shaft (7) and the intermediate shaft (8) are commonly provided with a transmission assembly (14).

2. An electric drive axle based power takeoff drive apparatus according to claim 1, characterized in that: The intermediate shaft (8) is arranged in parallel with the input shaft (7), and the half shaft (12) is arranged in parallel with the intermediate shaft (8).

3. The electric drive axle based power takeoff drive apparatus of claim 1, wherein: The transmission assembly (14) comprises a first gear input gear (141) and a second gear input gear (142), and the first gear input gear (141) and the second gear input gear (142) are fixedly connected to the surface of the input shaft (7).

4. An electric drive axle based power takeoff drive apparatus according to claim 3, characterized in that: The surface of the intermediate shaft (8) is fixedly connected with a first driven gear (143), and the surface of the intermediate shaft (8) is fixedly connected with a second driven gear (144), the first driven gear (143) is in meshing connection with the first gear input gear (141), and the second driven gear (144) is in meshing connection with the second gear input gear (142).

5. An electric drive axle based power takeoff drive apparatus according to claim 4, characterized in that: The surface of the intermediate shaft (8) is fixedly connected with a gear shifting switch (145), and the gear shifting switch (145) is located between the first driven gear (143) and the second driven gear (144).

6. An electric drive axle based power takeoff drive apparatus as set forth in claim 4 wherein: The secondary driving gear (9) is located on one side of the second driven gear (144).

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