CN219893091U - Electric driving device of electric vehicle - Google Patents
Electric driving device of electric vehicle Download PDFInfo
- Publication number
- CN219893091U CN219893091U CN202320930915.7U CN202320930915U CN219893091U CN 219893091 U CN219893091 U CN 219893091U CN 202320930915 U CN202320930915 U CN 202320930915U CN 219893091 U CN219893091 U CN 219893091U
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- 238000007789 sealing Methods 0.000 claims description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model provides an electric drive device of electric motor car, includes motor, gear box, the left box and the motor casing fixed connection of gear box, the rear end cap fixed connection of motor casing and motor, the right box and the left box fixed connection of gear box, the input shaft and the motor shaft spline fit connection of gear box, the input shaft is the hollow shaft, is equipped with the internal spline in the shaft hole of this hollow shaft, the input shaft right-hand member is supported on the right box through first bearing, and the input shaft left end is supported on the left box through the second bearing, the motor shaft right-hand member extends the motor casing and inserts in the shaft hole of input shaft, and the extension end sets up external spline and forms spline fit with the input shaft, set up the oil blanket between motor shaft and the left box, the motor shaft left end extends the motor casing and is supported on the rear end cap by the third bearing, the motor shaft left end cover has a wave spring, wave spring is located between third bearing and the rear end cap.
Description
Technical Field
The utility model relates to the field of electric driving, in particular to an electric driving device of an electric vehicle.
Background
In recent years, the automobile industry enters a rapid development stage, and with the economic development, people put higher demands on automobile drivability. At present, a motor shaft and an input shaft of a pure electric vehicle are usually supported by two bearings respectively, and the four bearings ensure more stable power transmission of the motor shaft and the input shaft. However, the four-bearing structure not only increases the production cost, but also can generate machining errors, so that the axle center errors are caused, and the power performance of the whole transmission device is affected.
The patent application with publication number of CN211641805U discloses a pure electric integrated power assembly input shaft connecting structure, a three-bearing structure is adopted to support a motor shaft and an input shaft, but a spline section and a clearance fit section of the motor shaft extending into the shaft hole of the input shaft are arranged too long, so that materials are wasted, and assembly is difficult; meanwhile, axial float can be generated when the motor shaft and the input shaft transmit power, the motor shaft can be in hard collision with the rear end cover, impact noise is caused, the service life of the transmission device is influenced by impact, and driving experience is also influenced. How to solve these problems requires an electric drive device for an electric vehicle that is cost-effective, noise-reducing, and long in service life.
Disclosure of Invention
The utility model aims to overcome the defects of the prior art, provides an electric driving device of an electric vehicle, and solves the problems that a motor shaft collides, interferes and has large noise due to axial movement in electric driving work, so that the service life and driving experience are influenced.
The technical scheme of the utility model is as follows: the utility model provides an electric drive device of electric motor car, includes motor, gear box, the left box and the motor casing fixed connection of gear box, the rear end cap fixed connection of motor casing and motor, the right box and the left box fixed connection of gear box, the input shaft and the motor shaft spline fit connection of gear box, the input shaft is the hollow shaft, is equipped with the internal spline in the shaft hole of this hollow shaft, the input shaft right-hand member is supported on the right box through first bearing, and the input shaft left end is supported on the left box through the second bearing, the motor shaft right-hand member extends the motor casing and inserts in the shaft hole of input shaft, and the extension end sets up external spline and forms spline fit with the input shaft, set up the oil blanket between motor shaft and the left box, the motor shaft left end extends the motor casing and is supported on the rear end cap by the third bearing, the motor shaft left end cover has a wave spring, wave spring is located between third bearing and the rear end cap.
The motor shaft is provided with a limit flange, the right side of the limit flange is a stepped shaft which is gradually decreased, the left side of the limit flange is a smooth section, the circumferential surface of the smooth section is axially provided with a bar-shaped key slot, the bar-shaped key slot is connected with a key arranged on a rotor of the motor in a matched mode, a pressing ring is sleeved on the smooth section and located on the left side of the rotor, and the pressing ring and the limit flange are used for axially fixing the rotor.
And an annular groove is arranged at the position of the motor shaft between the third bearing and the wave spring, and a retainer ring for the shaft is arranged in the annular groove and used for limiting the inner ring of the third bearing.
An annular gasket is sleeved on the motor shaft and is positioned between the wave spring and the rear end cover.
The annular gasket is made of No. 45 steel.
The outer circumferential surface of the third bearing is provided with a sealing groove, the sealing groove is used for placing a sealing ring, and the sealing ring is used for adjusting the assembly gap between the third bearing and the rear end cover.
The number of the sealing grooves is two.
The motor shell is in interference fit with a stator of the motor, and the stator is in clearance fit with the rotor.
The inner ring of the first bearing forms axial limit to the input shaft, the outer ring forms axial limit to the right box, the inner ring of the second bearing forms axial limit to the input shaft, and the outer ring forms axial limit to the left box.
An adjusting clamping ring is arranged between the right box body and the input shaft as well as between the right box body and the first bearing.
The technical scheme is adopted: the utility model provides an electric drive device of electric motor car, includes motor, gear box, the left box and the motor casing fixed connection of gear box, the rear end cap fixed connection of motor casing and motor, the right box and the left box fixed connection of gear box, the input shaft and the motor shaft spline fit connection of gear box, the input shaft is the hollow shaft, is equipped with the internal spline in the shaft hole of this hollow shaft, the input shaft right-hand member is supported on the right box through first bearing, and the input shaft left end is supported on the left box through the second bearing, the motor shaft right-hand member extends the motor casing and inserts in the shaft hole of input shaft, and the extension end sets up external spline and forms spline fit with the input shaft, set up the oil blanket between motor shaft and the left box, the motor shaft left end extends the motor casing and is supported on the rear end cap by the third bearing, the motor shaft left end cover has a wave spring, wave spring is located between third bearing and the rear end cap. The two ends of the input shaft are respectively supported on the right box body and the left box body of the gear box through a first bearing and a second bearing, one end of the motor shaft is inserted into the input shaft to form a support, the other end of the motor shaft is supported on the rear end cover through a third bearing, meanwhile, the two ends of the motor shaft form axial limiting, the three bearings are used for supporting and axially limiting the motor shaft and the input shaft, and the manufacturing cost of the electric driving device is reduced; the gaps among the left box body, the input shaft and the motor shaft are sealed by utilizing the oil seal, so that oil or impurities in the gear box are prevented from entering the motor to damage the motor; the wave spring is utilized to slow down the impact force of the axial float of the motor shaft, so that the motor shaft is prevented from being in direct contact with the rear end cover or interfering with the rear end cover, the abrasion of the motor shaft on the rear end cover is prevented, the service life is effectively prolonged, and meanwhile, noise is avoided during collision, and the driving experience is influenced.
The motor shaft is provided with a limit flange, the right side of the limit flange is a stepped shaft which is gradually decreased, the left side of the limit flange is a smooth section, the circumferential surface of the smooth section is axially provided with a bar-shaped key slot, the bar-shaped key slot is connected with a key arranged on a rotor of the motor in a matched mode, the smooth section is sleeved with a pressing ring, the pressing ring is positioned on the left side of the rotor, and the pressing ring and the limit flange are used for axially fixing the rotor and preventing the rotor from axially displacing with the motor shaft to influence power transmission.
The motor shaft is provided with an annular groove at the position between the third bearing and the wave spring, and the annular groove is provided with a retainer ring for the shaft, which is used for limiting the inner ring of the third bearing and preventing the third bearing from displacement or sliding.
An annular gasket is sleeved on the motor shaft and positioned between the wave spring and the rear end cover, so that friction interference between the wave spring and the rear end cover is prevented, and noise is avoided; meanwhile, the annular gasket is made of No. 45 steel, and is more wear-resistant than the aluminum alloy material adopted by the rear end cover generally, so that the abrasion of the waveform spring to the rear end cover is avoided, and the service life is influenced.
The outer circumferential surface of the third bearing is provided with a sealing groove, the sealing groove is used for placing a sealing ring, and the sealing ring is used for adjusting an assembly gap between the third bearing and the rear end cover and preventing the third bearing from running and wearing a bearing hole of the third bearing.
The number of the sealing grooves is two.
The motor shell is in interference fit with a stator of the motor, and the stator is in clearance fit with a rotor to form a power source of the electric drive device.
The inner ring of the first bearing forms axial limit to the input shaft, the outer ring forms axial limit to the right box body, the inner ring of the second bearing forms axial limit to the input shaft, the outer ring forms axial limit to the left box body, the input shaft and the left box body are formed to be axial limit through the first bearing and the second bearing, and the influence on power transmission caused by axial displacement of the input shaft is avoided.
And an adjusting clamping ring is arranged between the right box body and the input shaft as well as between the right box body and the first bearing and is used for adjusting the axial clearance of the input shaft assembly.
According to the electric driving device of the electric vehicle, the three bearings are used for forming the support, so that the production cost of electric driving is reduced, the impact force of axial movement of the motor shaft and the input shaft is relieved through the wave spring, the direct contact or interference between the motor shaft and the rear end cover is avoided, the vibration and the noise of the motor are reduced, the stable operation of the motor is facilitated, and the driving experience is improved.
The utility model is further described below with reference to the drawings and specific examples.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged view of the third bearing of the present utility model mated with a motor shaft;
FIG. 3 is a schematic view of the right end of the motor shaft of the present utility model;
FIG. 4 is a schematic view of the left end of the input shaft according to the present utility model;
fig. 5 is a schematic structural view of the seal ring of the present utility model.
Detailed Description
Referring to fig. 1 to 5, an electric driving device of an electric vehicle comprises a motor and a gear box, wherein a left box body 12 of the gear box is fixedly connected with a motor shell 6, the motor shell 6 is fixedly connected with a rear end cover 1 of the motor, a right box body 15 of the gear box is fixedly connected with the left box body 12, and an input shaft 11 of the gear box is in spline fit connection with a motor shaft 9. The motor housing 6 is in interference fit with a stator 7 of the motor, and the stator 7 is in clearance fit with a rotor 8. The input shaft 11 is a hollow shaft, an internal spline 11-3 is arranged in the middle of a shaft hole of the hollow shaft, the left side and the right side of the internal spline are smooth shaft holes, the left side is a clearance fit hole 11-2, an end face oil groove 11-4 is formed in an orifice of the clearance fit hole 11-2, the right end of the input shaft 11 is supported on a right box body 15 through a first bearing 13, an adjusting clamping ring 14 is arranged between the right box body 15 and the input shaft 11 and between the right box body and the first bearing 13, the adjusting clamping ring 14 is used for adjusting the axial clearance of the input shaft assembly, and the left end of the input shaft 11 is supported on a left box body 12 through a second bearing 10. The inner ring of the first bearing 13 forms axial limit to the input shaft 11, the outer ring forms axial limit to the right box 15, the inner ring of the second bearing 10 forms axial limit to the input shaft 11, and the outer ring forms axial limit to the left box 12. The motor shaft 9 is provided with a limit flange 91, the right side of the limit flange 91 is a step-by-step decreasing stepped shaft, the right end part of the stepped shaft is a small-diameter section, the small-diameter section comprises a clearance fit section 9-2 and a spline fit section 9-3, the outer circumferential surface of the clearance fit section 9-2 is provided with a spiral oil groove 9-4, the spline fit section 9-3 is provided with an external spline, the small-diameter section extends into a shaft hole of the input shaft 11, the clearance fit section 9-2 and the clearance fit hole 11-2 of the input shaft form a clearance fit 17, and the spline fit section 9-3 and an internal spline 11-3 in the shaft hole of the input shaft 11 form a spline fit 18 to transmit power; the left side of the limit flange 91 is a smooth section, a strip-shaped key slot 92 is axially arranged on the circumferential surface of the smooth section, the strip-shaped key slot is matched with a key arranged on the rotor 8 of the motor to form fixed connection, a compression ring 19 is sleeved on the smooth section, the compression ring 19 is positioned on the left side of the rotor 8, and the compression ring 19 and the limit flange 91 are used for axially fixing the rotor 8; the left side of the smooth section is the left end of a motor shaft 9, a motor shell 6 extends from the left end of the motor shaft 9 and is supported on the rear end cover 1 by a third bearing 5, a wave spring 3 is sleeved at the left end of the motor shaft 9, and the wave spring 3 is positioned between the third bearing 5 and the rear end cover 1. An annular groove is arranged at the position of the motor shaft 9 between the third bearing 5 and the wave spring 3, and the annular groove is provided with a retainer ring 4 for the shaft and is used for limiting the inner ring of the third bearing 5. An annular gasket 2 is sleeved on the motor shaft 9, the annular gasket 2 is positioned between the wave spring 3 and the rear end cover 1, and the annular gasket 2 is made of 45 # steel. The outer circumferential surface of the third bearing 5 is provided with sealing grooves, the sealing grooves are used for placing sealing rings 5-1, the sealing rings 5-1 are used for adjusting the assembly gap between the third bearing 5 and the rear end cover 1, the number of the sealing grooves is two, and the sealing rings 5-1 are O-shaped sealing rings.
In the embodiment, the input shaft and the motor shaft are supported on the rear end cover of the motor and the box body of the gear box through the first bearing, the second bearing and the third bearing, and the bearing shoulder of the stepped shaft at the right end of the motor shaft is abutted with the left end part of the input shaft to jointly form a supporting and axial fixing structure, so that compared with a four-bearing supporting structure in the prior art, the production cost is saved; the wave spring is used for buffering the power of axial movement when the motor transmits power, so that collision interference between the motor shaft and the rear end cover is prevented, the rear end cover is damaged, power transmission is affected, noise and vibration are reduced, and driving experience is improved; the inside of the speed reducer is sealed through the oil seal, so that the damage to the motor caused by the fact that gear oil and impurities at the side of the speed reducer enter the inside of the motor is prevented; the axial clearance between the input shaft and the motor shaft is adjusted through the annular gasket and the adjusting clamping ring, so that the motor shaft and the input shaft can transmit power conveniently.
The electric driving device of the electric vehicle adopts the three-bearing supporting structure, thereby saving the cost and being convenient for assembly; the wave spring is arranged to avoid collision interference between the motor shaft and the rear end cover, so that noise is reduced, and service life is prolonged.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the utility model, and those skilled in the art will appreciate that the modifications made to the utility model fall within the scope of the utility model without departing from the spirit of the utility model.
Claims (10)
1. The utility model provides an electric drive device of electric motor car, includes motor, gear box, left box (12) and motor casing (6) fixed connection of gear box, motor casing (6) and rear end cap (1) fixed connection of motor, right box (15) and left box (12) fixed connection of gear box, input shaft (11) and motor shaft (9) spline fit connection of gear box, its characterized in that: the input shaft (11) is a hollow shaft, an internal spline is arranged in a shaft hole of the hollow shaft, the right end of the input shaft (11) is supported on a right box body (15) through a first bearing (13), the left end of the input shaft (11) is supported on a left box body (12) through a second bearing (10), the right end of a motor shaft (9) extends out of a motor shell (6) to be inserted into the shaft hole of the input shaft (11), an external spline is arranged at the extending end to form spline fit with the input shaft (11), an oil seal (16) is arranged between the motor shaft (9) and the left box body (12), the left end of the motor shaft (9) extends out of the motor shell (6) to be supported on a rear end cover (1) through a third bearing (5), and a wave spring (3) is sleeved at the left end of the motor shaft (9), and the wave spring (3) is positioned between the third bearing (5) and the rear end cover (1).
2. The electric drive apparatus of an electric vehicle according to claim 1, characterized in that: set up a limit flange (91) on motor shaft (9), limit flange (91) right side is step by step-by-step stepped shaft, and limit flange (91) left side is a smooth section, and the circumference axial of this smooth section is equipped with a bar keyway (92), the key cooperation that sets up on bar keyway (92) and rotor (8) of motor forms to be connected, the cover has a clamping ring (19) on the smooth section, clamping ring (19) are located rotor (8) left side, clamping ring (19), limit flange (91) are used for axial fixity rotor (8).
3. The electric drive apparatus of an electric vehicle according to claim 1, characterized in that: an annular groove is formed in the position, between the third bearing (5) and the wave spring (3), of the motor shaft (9), and the annular groove is used for installing a retainer ring (4) for the shaft to be used for limiting the inner ring of the third bearing (5).
4. The electric drive apparatus of an electric vehicle according to claim 1, characterized in that: an annular gasket (2) is sleeved on the motor shaft (9), and the annular gasket (2) is positioned between the wave spring (3) and the rear end cover (1).
5. The electric drive apparatus of an electric vehicle according to claim 4, characterized in that: the annular gasket (2) is made of No. 45 steel.
6. The electric drive apparatus of an electric vehicle according to claim 1, characterized in that: the outer circumferential surface of the third bearing (5) is provided with a sealing groove, a sealing ring (5-1) is placed in the sealing groove, and the sealing ring (5-1) is used for adjusting the assembly gap between the third bearing (5) and the rear end cover (1).
7. The electric drive apparatus of an electric vehicle according to claim 6, characterized in that: the number of the sealing grooves is two.
8. The electric drive apparatus of an electric vehicle according to claim 1, characterized in that: the motor shell (6) is in interference fit with a stator (7) of the motor, and the stator (7) is in clearance fit with the rotor (8).
9. The electric drive apparatus of an electric vehicle according to claim 1, characterized in that: the inner ring of the first bearing (13) forms axial limit to the input shaft (11), the outer ring forms axial limit to the right box (15), the inner ring of the second bearing (10) forms axial limit to the input shaft (11), and the outer ring forms axial limit to the left box (12).
10. The electric drive apparatus of an electric vehicle according to claim 1, characterized in that: an adjusting clamping ring (14) is arranged between the right box body (15) and the input shaft (11) and between the right box body and the first bearing (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320930915.7U CN219893091U (en) | 2023-04-23 | 2023-04-23 | Electric driving device of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320930915.7U CN219893091U (en) | 2023-04-23 | 2023-04-23 | Electric driving device of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219893091U true CN219893091U (en) | 2023-10-24 |
Family
ID=88408511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320930915.7U Active CN219893091U (en) | 2023-04-23 | 2023-04-23 | Electric driving device of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219893091U (en) |
-
2023
- 2023-04-23 CN CN202320930915.7U patent/CN219893091U/en active Active
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