CN211599485U - Pure electric vehicles transmission system vibration/noise reduction device - Google Patents
Pure electric vehicles transmission system vibration/noise reduction device Download PDFInfo
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- CN211599485U CN211599485U CN201922147420.3U CN201922147420U CN211599485U CN 211599485 U CN211599485 U CN 211599485U CN 201922147420 U CN201922147420 U CN 201922147420U CN 211599485 U CN211599485 U CN 211599485U
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Abstract
The utility model discloses a pure electric vehicles transmission system vibration/noise reduction device, including a reducer and a transmission shaft connected with the reducer, wherein the output end of the reducer is connected with the transmission shaft through a spline connection component and a flexible coupling which are coaxially arranged; the spline connecting assembly comprises an output external spline arranged at the output end of the speed reducer and a sliding internal spline which is in adaptive connection with the output external spline; the flexible coupling comprises a first connecting flange fixedly connected to the outer end of the sliding inner spline and a second connecting flange fixedly connected to the input end of the transmission shaft, a flexible connecting disc is arranged between the first connecting flange and the second connecting flange, and the first connecting flange and the second connecting flange are coaxially fixedly connected to the flexible connecting disc through fixing pieces. The utility model discloses the advantage is in being convenient for install and lays, effectively alleviates the transmission system vibration, and the noise reduction to make spline coupling assembling can fully lubricate, increase of service life greatly shortens design cycle, makes the manufacturability of whole car assembly better.
Description
Technical Field
The utility model belongs to the technical field of the automotive transmission technique and specifically relates to a pure electric vehicles transmission system vibration/noise reduction device is related to.
Background
With the increasing requirements of people on the vehicle running system and the NVH performance, the performance design of each part of the vehicle is continuously improved. The transmission shaft is the indispensable spare part among the vehicle power transmission system, and at present, along with national popularization to pure electric vehicles, the more and more of pure electric vehicles of front-mounted rear-guard, indulge and put the transmission shaft and become the indispensable spare part in the torque transmission process.
The existing front-mounted rear-drive pure electric vehicle is simple in design structure, a motor serves as a power source, then a speed reducer is connected, the speed reducer is connected with a transmission shaft through a flange, power is transmitted to a rear axle through a rear flange of the transmission shaft, and meanwhile, a whole transmission system is free of comprehensive vibration attenuation devices such as torsional vibration and bending vibration, so that during high-speed driving of the vehicle, the interior of the vehicle is prone to generate rumbling due to unstable output torque of the motor, or the problem of torsional vibration of the whole vehicle is caused during driving of the vehicle in a low-speed and high-torque state, and passengers are caused to complain strongly.
In the existing longitudinally-arranged transmission shaft structure, namely in the design of a transmission shaft with the length of a shaft tube being more than 1.5m, the transmission shaft is connected with a speed reducer through a flange, and an intermediate supporting structure is arranged; in addition, a telescopic spline structure is usually set in front of or behind the intermediate support structure according to the structure of the vehicle. This kind of transmission shaft structure passes through flange joint because reduction gear and transmission shaft, in workshop assembly process, need alone to hold up the transmission shaft flange to last reduction gear output flange hole, and the connecting bolt that reuses passes the screw hole in proper order, uses spanner and air trigger to fasten the bolt in proper order at last, and this structure assembly complex operation and man-hour are than longer, arouse the workman to complain easily.
In addition, because flexible spline structural design still can lead to the transmission shaft quality uneven at middle bearing structure's unilateral, and middle central siphon weight increases, centrifugal force and unbalance when having increased the rotation, and because the unable effectual isolation of vibration that produces for the transmission shaft arouses the vibration abnormal sound in torque transmission process, has reduced transmission system NVH performance.
In addition, among the existing structure, because each universal joint of transmission shaft all has the angle of arranging in whole car design to flexible spline structural design is at middle bearing structure's anterior segment or back end, this will cause and has the contained angle between flexible spline structure's the axis and the middle bearing structure's the axis, can produce radial unbalanced force in transmission shaft moment of torsion transmission process, produce the vibration influence to middle bearing structure, easily cause whole car vibration, this kind of vibration mainly transmits for automobile body floor through the middle bearing structure of transmission shaft.
Disclosure of Invention
An object of the utility model is to provide a pure electric vehicles transmission system vibration/noise reduction device.
In order to achieve the above purpose, the utility model can adopt the following technical proposal:
the pure electric vehicle transmission system damping and noise reducing device comprises a speed reducer and a transmission shaft connected with the speed reducer, wherein the output end of the speed reducer is in transmission connection with the transmission shaft through a spline connection assembly and a flexible coupling which are coaxially arranged; the spline connecting assembly comprises an output external spline arranged at the output end of the speed reducer and a sliding internal spline which is in adaptive connection with the output external spline; the flexible coupling comprises a first connecting flange fixedly connected with the outer end of the sliding inner spline and a second connecting flange fixedly connected with the input end of the transmission shaft, a flexible connecting disc is arranged between the first connecting flange and the second connecting flange, and the first connecting flange and the second connecting flange are coaxially fixedly connected on the flexible connecting disc through fixing pieces.
The first connecting flange and the second connecting flange are three-jaw flange joint forks with the same structure, six connecting through holes are uniformly distributed on the flexible connecting disc along the circumferential direction, and the first connecting flange and the second connecting flange are connected to the six connecting through holes of the flexible connecting disc in a staggered mode through fixing bolts.
And a centering shaft penetrating through the flexible connecting disc is vertically and fixedly arranged at the axis of the first connecting flange, and a centering shaft sleeve in adaptive connection with the centering shaft is arranged at the axis of the second connecting flange.
The output port of reduction gear is provided with the first dust cover of opening towards the transmission shaft the slip internal spline with the junction of first flange is provided with the second dust cover of opening towards the reduction gear, the opening side adaptation suit of second dust cover is in the first dust cover, forms the dustproof shell body of whole spline coupling assembling of cladding.
And an oil seal which is hermetically sleeved on the sliding internal spline is arranged on the inner side of the output port of the speed reducer.
The utility model discloses the advantage is in being convenient for install and lays, effectively alleviates transmission system vibration, reduces the noise. The spline connecting assembly is directly arranged at the output end of the speed reducer, so that the centrifugal force and unbalance of the speed reducer during rotation are reduced, the vibration and noise caused by the unbalance are reduced, the spline connecting assembly can be fully lubricated, and the service life is greatly prolonged; in addition, the connecting spline assembly at the output end of the speed reducer is connected with the transmission shaft through the flexible coupling, and compared with a flange plate of a traditional rigid connecting structure, the design cost is ensured to be low, meanwhile, the design period is shortened, and the manufacturability of the whole vehicle assembly is better.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is an enlarged schematic view of the first and second attachment flanges of fig. 1.
Fig. 3 is a sectional structure view of the present invention.
Detailed Description
As shown in fig. 1 and 3, pure electric vehicles transmission system vibration/noise reduction device, including reduction gear 1 and the transmission shaft 2 that links to each other with it, the output of reduction gear 1 is connected with 2 transmissions of transmission shaft through coaxial spline coupling assembling and the flexible coupling of laying.
Specifically, this spline coupling assembling is including setting up output external splines 3 at 1 output of reduction gear to and with output external splines 3 adaptation connection's slip internal splines 4, this slip internal splines 4 can be followed the axial slip of output external splines 3, can slide flexible on slip external splines 3 promptly, thereby easily realizes stretching out the adjustment of length to slip internal splines 4, with the different motorcycle types of adaptation.
The flexible coupling comprises a first connecting flange 5 (the first connecting flange 5 and the sliding inner spline 4 can be of an integral structure) fixedly connected to the outer end of the sliding inner spline 4 and a second connecting flange 6 fixedly connected to the input end of a transmission shaft 2, wherein the first connecting flange 5 and the second connecting flange 6 are three-jaw flange yokes with the same structure, and the central angle between holes in two adjacent jaws of each three-jaw flange yoke is 120 degrees; a flexible connecting disc 7 is arranged between the first connecting flange 5 and the second connecting flange 6, six connecting through holes 8 are uniformly distributed on the flexible connecting disc 7 along the circumferential direction, the central angle between every two adjacent connecting through holes 8 is 60 degrees, and the flexible connecting disc is just matched with the first connecting flange 5 and the second connecting flange 6, so that the first connecting flange 5 and the second connecting flange 6 can be connected to the six connecting through holes 8 of the flexible connecting disc 7 in a staggered mode through fixing bolts; the flexible connecting disc 7 is used for fully absorbing vibration and noise generated by unbalance of the output torque of the motor, and rigid transmission connection in the transmission sense is avoided.
In order to facilitate the installation of the first connecting flange 5, the second connecting flange 6 and the flexible connecting disk 7, as shown in fig. 2, a centering shaft 9 penetrating through the flexible connecting disk 7 is vertically and fixedly arranged at the axis of the first connecting flange 5, a centering shaft sleeve 10 in adaptive connection with the centering shaft 9 is arranged at the axis of the second connecting flange 6, and the centering shaft 9 and the centering shaft sleeve 10 are matched with each other, so that the front and back coaxiality of the flexible coupling is ensured while the installation is facilitated and the alignment is facilitated.
For preventing the output of reduction gear 1 from advancing dirt to and prevent that the dust from adhering to on output external splines 3 and the slip internal splines 4, be provided with the first dust cover 11 of opening towards transmission shaft 2 on the output port of reduction gear 1, and be provided with the second dust cover 12 of opening towards reduction gear 1 at the junction of slip internal splines 4 and first connecting flange 5, the opening side adaptation suit of second dust cover 12 is in first dust cover 11, forms the dustproof shell body of the whole spline coupling assembling of cladding. In addition, an oil seal 13 which is hermetically sleeved on the sliding internal spline 4 is arranged on the inner side of the output port of the speed reducer 1, and oil leakage at the output end of the speed reducer 1 is prevented through the oil seal 13.
Claims (5)
1. The utility model provides a pure electric vehicles transmission system vibration/noise reduction device, includes reduction gear (1) and transmission shaft (2) that link to each other with it, its characterized in that: the output end of the speed reducer (1) is in transmission connection with the transmission shaft (2) through a spline connection assembly and a flexible coupling which are coaxially arranged;
the spline connecting assembly comprises an output external spline (3) arranged at the output end of the speed reducer (1) and a sliding internal spline (4) which is in adaptive connection with the output external spline (3);
the flexible coupling comprises a first connecting flange (5) fixedly connected with the outer end of the sliding inner spline (4) and a second connecting flange (6) fixedly connected with the input end of the transmission shaft (2), a flexible connecting disc (7) is arranged between the first connecting flange and the second connecting flange (5 and 6), and the first connecting flange and the second connecting flange (5 and 6) are coaxially fixedly connected on the flexible connecting disc (7) through fixing pieces.
2. The pure electric vehicle transmission system shock absorption and noise reduction device according to claim 1, characterized in that: the first connecting flange and the second connecting flange (5 and 6) are three-jaw flange joint forks with the same structure, six connecting through holes (8) are uniformly distributed on the flexible connecting disc (7) along the circumferential direction, and the first connecting flange and the second connecting flange (5 and 6) are connected on the six connecting through holes (8) of the flexible connecting disc (7) in a staggered mode through fixing bolts.
3. The pure electric vehicle transmission system shock absorption and noise reduction device according to claim 2, characterized in that: a centering shaft (9) penetrating through the flexible connecting disc (7) is vertically and fixedly arranged at the axis of the first connecting flange (5), and a centering shaft sleeve (10) in adaptive connection with the centering shaft (9) is arranged at the axis of the second connecting flange (6).
4. The pure electric vehicle transmission system shock absorption and noise reduction device according to claim 1, characterized in that: be provided with opening towards first dust cover (11) of transmission shaft (2) on the output port of reduction gear (1) slip internal spline (4) with the junction of first flange (5) is provided with opening towards second dust cover (12) of reduction gear (1), the opening side adaptation suit of second dust cover (12) is in first dust cover (11), forms the dustproof shell body of the whole spline coupling assembling of cladding.
5. The pure electric vehicle transmission system shock absorption and noise reduction device according to claim 1, characterized in that: and an oil seal (13) which is hermetically sleeved on the sliding internal spline (4) is arranged on the inner side of the output port of the speed reducer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922147420.3U CN211599485U (en) | 2019-12-04 | 2019-12-04 | Pure electric vehicles transmission system vibration/noise reduction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922147420.3U CN211599485U (en) | 2019-12-04 | 2019-12-04 | Pure electric vehicles transmission system vibration/noise reduction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211599485U true CN211599485U (en) | 2020-09-29 |
Family
ID=72590532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922147420.3U Active CN211599485U (en) | 2019-12-04 | 2019-12-04 | Pure electric vehicles transmission system vibration/noise reduction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211599485U (en) |
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2019
- 2019-12-04 CN CN201922147420.3U patent/CN211599485U/en active Active
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