CN104179811A - Automobile constant speed driving shaft - Google Patents
Automobile constant speed driving shaft Download PDFInfo
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- CN104179811A CN104179811A CN201410435113.4A CN201410435113A CN104179811A CN 104179811 A CN104179811 A CN 104179811A CN 201410435113 A CN201410435113 A CN 201410435113A CN 104179811 A CN104179811 A CN 104179811A
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- axle
- half axle
- left half
- shaft
- axle shaft
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Abstract
The invention relates to an automobile constant speed driving shaft. The automobile constant speed driving shaft comprises a left half axle and a right half axle, wherein the left end of the left half axle is assembled with a left side wheel through a left half axle fixed knot, the right end of the left half axle is assembled with a left side half axle gear of a differential mechanism in a power transmission device through a left half axle moving knot, the left end of the right half axle is assembled with a right side half axle gear of the differential mechanism in the power transmission device through a right half axle moving knot, the right end of the right half axle is assembled with a right side wheel through a right half axle fixed knot, the right half axle is of a hollow axle tube structure, the left half axle is of a solid rod axle structure, the length of the right half axle hollow axle tube is X, the length of the left half axle solid rod axle is Y, X is greater than Y, the torsion rigidity of the right half axle is K right, the torsion rigidity of the left half axle is K left, and the K right is equal to the K left. The automobile constant speed driving shaft not only solves the off-tracking problem during dynamic load acceleration running of the whole vehicle caused by inconsistent torsion angles of the left half axle and the right half axle, but also eliminates resonance phenomenon caused by different rotating speed working conditions of the engine, so that the NVH (Noise Vibration and Harshness) performances and economical performance of the vehicle are improved.
Description
Technical field
The present invention relates to a kind of car transmissions live axle, especially a kind of automobile constant velocity live axle, belongs to truck drive shaft technical field.
Background technique
Along with the raising of people to automobile running reliability and NVH performance requirement, the each parts design level of automobile chassis constantly promotes, live axle is as transmission system important composition parts, not only in power transmission process, play a part very importantly, and its impact on vehicle NVH performance is also very important.
As shown in Figure 1, in prior art for preposition precursor vehicle and SUV vehicle, due to the layout deflection car body left side of its motor, the central axis I of actuating unit 3 does not overlap with car body central axis II, therefore need live axle right axle shaft 1 to design longlyer, and its axostylus axostyle is designed to solid construction with the external damping ring hollow-core construction of a built-in damping ring (or with), to promote live axle mode (natural frequency); But because there is axostylus axostyle length inconsistence problems with right axle shaft 1 in the left half axle 2 of above-mentioned live axle, and left and right half shaft diameter is identical, when vehicle is in the time that dynamic load operating mode is moved, the windup-degree difference at left and right half two ends, because axostylus axostyle windup-degree Φ is (as shown in Figure 2) increasing progressively with the increasing of axostylus axostyle length L, so vehicle right side wheels corner can be greater than left side wheel corner, cause like this car load deviation phenomenon of giving it the gun; Because right axle shaft in prior art 1 is longer, its axostylus axostyle is mostly solid construction simultaneously, and not only torsional rigidity is low, and weight is larger, and fuel economy is poor; Internal or external damping ring structure of the prior art can only be eliminated the flexure vibrations that cause under a certain rotating speed of motor in addition, cannot solve the resonance problem that motor different rotating speeds operating mode (in wide-band) causes.
Summary of the invention
The object of the invention is to the drawback for prior art, provide a kind of and can solve sideslip problem while travelling because of the inconsistent car load dynamic load causing of left and right semiaxis torsion angle, can eliminate again motor different rotating speeds (in the wide-band) resonance phenomenon causing, the automobile constant velocity live axle of lifting vehicle NVH performance.
Problem of the present invention realizes with following technical proposals:
A kind of automobile constant velocity live axle, comprise left half axle and right axle shaft, wherein left half axle left end is by left half axle fixed knot and left side wheel assembling, left half axle right-hand member is by the left side differential gear assembling of differential mechanism in left half axle movable joint and actuating unit, right axle shaft left end is by the right axle gear assembling of differential mechanism in right axle shaft movable joint and actuating unit, right axle shaft right-hand member is by right axle shaft fixed knot and right side wheels assembling, described right axle shaft is hollow shaft tubular construction, described left half axle is solid hopkinson bar axle construction, the length of the hollow central siphon of right axle shaft is X, the length of left half axle solid hopkinson bar axle is Y, X > Y, right axle shaft torsional stiffness is the K right side, left half axle torsional stiffness is a K left side, the K right side=K left side.
Above-mentioned automobile constant velocity live axle, the hollow central siphon of described right axle shaft inside arranges the damping ring of two different natural frequencies, and noise reduction dielectric coatings is also set on the madial wall of the hollow central siphon of right axle shaft.
Above-mentioned automobile constant velocity live axle, described damping ring comprises outer skeleton, rubber body and mass block, described rubber body sulfuration is fixed on outer skeleton, rubber body is made up of the two-part that are positioned at outer skeleton medial and lateral, wherein outer skeleton inside portion is divided along circumferential interval layout, described mass block is cylindrical structure, is sleeved on the inner side of outer skeleton, and its external cylindrical surface is connected with an outer skeleton inside portion point rubber body.
Above-mentioned automobile constant velocity live axle, described damping ring selects to control the natural frequency of damping ring by the rigidity of the weight to mass block and rubber body.
Above-mentioned automobile constant velocity live axle, described right axle shaft hollow shaft length of tube X=650mm, outer diameter A=36 mm, internal diameter B=30 mm, the torsional rigidity K right side=161 N.m/ °, described left half axle solid hopkinson bar shaft length Y=398mm, shaft diameter is C=26mm, a torsional rigidity K left side=161 N.m/ °.
Right axle shaft is designed to hollow shaft tubular construction by the present invention, and the damping ring of two different frequencies is set in hollow central siphon inside, according to damping ring natural frequency fd formula:
(k
drepresent the radial rigidity of rubber, m
dthe weight of damping ring mass block), can be by adjusting the natural frequency of damping ring mass block weight and rubber body stiffness change damping ring, making one of them damping ring natural frequency is the interval crest respective value of resonant frequency, another damping ring natural frequency is resonance band respective value after a damping ring of increase, the change that realizes right axle shaft natural frequency with this, final realization eliminated each crest in interval of resonance; The present invention increases noise reduction dielectric coatings on right axle shaft hollow shaft inner tube wall, for absorbing vibration noise, has further improved the NVH performance of vehicle; Left half axle is designed to solid shaft structure by the present invention, and make left half axle axostylus axostyle length Y be less than right axle shaft central siphon length X, can pass through calculative determination left half axle shaft diameter C, the parameter values such as right axle shaft central siphon outer diameter A, internal diameter B, make left and right half equal stiffness, eliminate the sideslip problem that left and right half windup-degree difference under dynamic load operating mode causes; Right axle shaft of the present invention is designed to hollow shaft tubular construction, and its beneficial effect is also embodied in: reduced complete vehicle weight, promoted VE Vehicle Economy.In a word, the present invention has not only solved sideslip problem while giving it the gun because of the inconsistent car load dynamic load causing of left and right semiaxis torsion angle, and eliminated the resonance phenomenon that motor different rotating speeds (in wide-band) causes, improve NVH performance and the economic performance of vehicle.
Brief description of the drawings
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is that preposition precursor vehicle and SUV vehicle drive shaft are arranged schematic diagram;
Fig. 2 is live axle torsion angle schematic diagram under dynamic load operating mode;
Fig. 3 is structural representation of the present invention;
Fig. 4 is right axle shaft structural representation;
Fig. 5 is damping ring cross-sectional view;
Fig. 6 is A-A cross-sectional view in Fig. 5;
Fig. 7 is left half axle structural representation;
Fig. 8 is live axle mode of vibration in prior art (vibration frequency and amplitude corresponding relation) schematic diagram;
Fig. 9 is live axle mode of vibration (vibration frequency and the amplitude corresponding relation) schematic diagram of the specific embodiment of the invention.
In figure, each list of reference numerals is: 1, right axle shaft, 1-1, the hollow central siphon of right axle shaft, 1-2, right axle shaft movable joint, 1-3, right axle shaft fixed knot, 1-4, damping ring, 1-4-1, mass block, 1-4-2, rubber body, 1-4-3, outer skeleton, 1-5, noise reduction dielectric coatings, 2, left half axle, 2-1, left half axle solid shaft, 2-2, left half axle movable joint, 2-3, left half axle fixed knot, 3, actuating unit, 4, right side wheels, 5, left side wheel.
Embodiment
Referring to Fig. 3, Fig. 4, Fig. 7, the present invention includes left half axle 2 and right axle shaft 1, wherein left half axle left end assembles by left half axle fixed knot 1-3 and left side wheel 5, left half axle right-hand member is by the left side differential gear assembling of differential mechanism in left half axle movable joint 1-2 and actuating unit 3, right axle shaft left end is by the right axle gear assembling of differential mechanism in right axle shaft movable joint 1-2 and actuating unit 3, right axle shaft right-hand member assembles by right axle shaft fixed knot 1-3 and right side wheels 4, described right axle shaft 1 is hollow shaft tubular construction, described left half axle is solid hopkinson bar axle construction, the hollow central siphon 1-1 of right axle shaft length is X, left half axle solid hopkinson bar axle 2-1 length is Y, X > Y, right axle shaft torsional stiffness is the K right side, left half axle torsional stiffness is a K left side, the K right side=K left side.
Referring to Fig. 4, Fig. 5, Fig. 6, the hollow central siphon 1-1 of right axle shaft of the present invention inside arranges the damping ring 1-4 of two different natural frequencies, and noise reduction dielectric coatings 1-5 is also set on the madial wall of the hollow central siphon 1-1 of right axle shaft; Described damping ring 1-4 comprises outer skeleton 1-4-3, rubber body 1-4-2 and mass block 1-4-1, described rubber body 1-4-2 sulfuration is fixed on outer skeleton 1-4-3, rubber body 1-4-2 is made up of the two-part that are positioned at outer skeleton medial and lateral, wherein outer skeleton inside portion is divided along circumferential interval layout, described mass block 1-4-1 is cylindrical structure, be sleeved on the inner side of outer skeleton 1-4-3, its external cylindrical surface is connected with an outer skeleton inside portion point rubber body; Described damping ring 1-4 selects to control the natural frequency of damping ring by the rigidity of the weight to mass block 1-4-1 and rubber body 1-4-2.
Referring to Fig. 3, Fig. 4, Fig. 7, a specific embodiment of the present invention is: the hollow central siphon 1-1 of right axle shaft length X=650mm, and outer diameter A=36 mm, internal diameter B=30 mm, left half axle solid hopkinson bar axle 2-1 length Y=398mm, shaft diameter is C=26mm; According to axostylus axostyle or central siphon (comprising solid shaft and hollow central siphon) torsional stiffness formula: K
t=GIp and torsion angle formula:
, (the shear elasticity modulus (getting 80GPa) that in formula, G is material, I
pfor the polar moment of inertia of axle circular section
t is live axle design torque, l is half shaft length), check calculates the torsional stiffness K right side=161 N.m/ ° of the hollow central siphon 1-1 of right axle shaft, a torsional stiffness K left side=161 N.m/ ° of left half axle solid hopkinson bar axle 2-1, the K right side=K left side, torsion angle Φ left the equating of torsion angle Φ right and left half axle solid hopkinson bar axle 2-1 of the hollow central siphon 1-1 of right axle shaft, be the Φ right side=Φ left side, therefore eliminate the left and right half sideslip problem that windup-degree difference causes under dynamic load (moment of torsion is M) operating mode.
Referring to Fig. 8, Fig. 9, the present invention is by arranging two damping ring 1-4 that natural frequency is different and noise reduction dielectric coatings 1-5 being set on the madial wall of the hollow central siphon 1-1 of right axle shaft in the hollow central siphon 1-1 of right axle shaft inside, live axle mode of vibration is changed, the amplitude that resonance occurs live axle decays to H2 by H1, eliminate the resonance, the boom that in motor wide-band, cause, improved the NVH performance of vehicle.
Claims (5)
1. an automobile constant velocity live axle, comprise left half axle (2) and right axle shaft (1), wherein left half axle left end is by left half axle fixed knot (1-3) and left side wheel (5) assembling, left half axle right-hand member is the left side differential gear assembling with the middle differential mechanism of actuating unit (3) by left half axle movable joint (1-2), right axle shaft left end is the right axle gear assembling with the middle differential mechanism of actuating unit (3) by right axle shaft movable joint (1-2), right axle shaft right-hand member is by right axle shaft fixed knot (1-3) and right side wheels (4) assembling, it is characterized in that, described right axle shaft (1) is hollow shaft tubular construction, described left half axle is solid hopkinson bar axle construction, the hollow central siphon of right axle shaft (1-1) length is X, left half axle solid hopkinson bar axle (2-1) length is Y, X > Y, right axle shaft torsional stiffness is the K right side, left half axle torsional stiffness is a K left side, the K right side=K left side.
2. a kind of automobile constant velocity live axle according to claim 1, it is characterized in that, the hollow central siphon of described right axle shaft (1-1) inside arranges the damping ring (1-4) of two different natural frequencies, and noise reduction dielectric coatings (1-5) is also set on the madial wall of the hollow central siphon of right axle shaft (1-1).
3. a kind of automobile constant velocity live axle according to claim 2, it is characterized in that, described damping ring (1-4) comprises outer skeleton (1-4-3), rubber body (1-4-2) and mass block (1-4-1), described rubber body (1-4-2) sulfuration is fixed on outer skeleton (1-4-3), rubber body (1-4-2) is by being positioned at outer skeleton, two-part composition in outside, wherein outer skeleton inside portion is divided along circumferential interval layout, described mass block (1-4-1) is cylindrical structure, be sleeved on the inner side of outer skeleton (1-4-3), its external cylindrical surface is connected with an outer skeleton inside portion point rubber body.
4. a kind of automobile constant velocity live axle according to claim 3, is characterized in that, described damping ring (1-4) selects to control the natural frequency of damping ring by the rigidity of the weight to mass block (1-4-1) and rubber body (1-4-2).
5. a kind of automobile constant velocity live axle according to claim 4, it is characterized in that, the hollow central siphon of described right axle shaft (1-1) length X=650mm, outer diameter A=36 mm, internal diameter B=30 mm, the torsional rigidity K right side=161 N.m/ °, described left half axle solid hopkinson bar axle (2-1) length Y=398mm, shaft diameter is C=26mm, a torsional rigidity K left side=161 N.m/ °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410435113.4A CN104179811B (en) | 2014-08-30 | A kind of automobile constant velocity drive shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410435113.4A CN104179811B (en) | 2014-08-30 | A kind of automobile constant velocity drive shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104179811A true CN104179811A (en) | 2014-12-03 |
| CN104179811B CN104179811B (en) | 2017-01-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344490A (en) * | 2017-06-30 | 2017-11-14 | 北京新能源汽车股份有限公司 | Electric four-wheel drive driving device and electric automobile |
| CN110159702A (en) * | 2019-06-21 | 2019-08-23 | 浙江向隆机械有限公司 | A kind of external bifrequency semiaxis dynamic vibration absorber |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4223565A (en) * | 1976-12-11 | 1980-09-23 | Honda Giken Kogyo Kabushiki Kaisha | Device for attenuating vibrations in a drive shaft of a motor vehicle |
| CN201162785Y (en) * | 2008-02-21 | 2008-12-10 | 温州市冠盛汽车零部件集团股份有限公司 | High-efficiency large-swinging angle large-slippage constant speed transmission shaft assembly |
| US20100029394A1 (en) * | 2008-07-31 | 2010-02-04 | Arden Tony N | Vehicle joint design utilizing bipode element |
| CN201425062Y (en) * | 2009-05-08 | 2010-03-17 | 万向钱潮股份有限公司 | Constant speed driving shaft assembly with great swing angle and great slippage |
| CN202228553U (en) * | 2011-10-12 | 2012-05-23 | 浙江向隆机械有限公司 | Constant speed drive shaft |
| CN202326791U (en) * | 2011-12-04 | 2012-07-11 | 宁波纬尚汽车零部件有限公司 | Driving shaft assembly convenient to disassemble |
| CN203214685U (en) * | 2013-02-28 | 2013-09-25 | 浙江吉利汽车研究院有限公司杭州分公司 | Constant velocity drive shaft assembly |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4223565A (en) * | 1976-12-11 | 1980-09-23 | Honda Giken Kogyo Kabushiki Kaisha | Device for attenuating vibrations in a drive shaft of a motor vehicle |
| CN201162785Y (en) * | 2008-02-21 | 2008-12-10 | 温州市冠盛汽车零部件集团股份有限公司 | High-efficiency large-swinging angle large-slippage constant speed transmission shaft assembly |
| US20100029394A1 (en) * | 2008-07-31 | 2010-02-04 | Arden Tony N | Vehicle joint design utilizing bipode element |
| CN201425062Y (en) * | 2009-05-08 | 2010-03-17 | 万向钱潮股份有限公司 | Constant speed driving shaft assembly with great swing angle and great slippage |
| CN202228553U (en) * | 2011-10-12 | 2012-05-23 | 浙江向隆机械有限公司 | Constant speed drive shaft |
| CN202326791U (en) * | 2011-12-04 | 2012-07-11 | 宁波纬尚汽车零部件有限公司 | Driving shaft assembly convenient to disassemble |
| CN203214685U (en) * | 2013-02-28 | 2013-09-25 | 浙江吉利汽车研究院有限公司杭州分公司 | Constant velocity drive shaft assembly |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344490A (en) * | 2017-06-30 | 2017-11-14 | 北京新能源汽车股份有限公司 | Electric four-wheel drive driving device and electric automobile |
| CN107344490B (en) * | 2017-06-30 | 2019-10-18 | 北京新能源汽车股份有限公司 | Electric four-wheel drive driving device and electric automobile |
| CN110159702A (en) * | 2019-06-21 | 2019-08-23 | 浙江向隆机械有限公司 | A kind of external bifrequency semiaxis dynamic vibration absorber |
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Effective date of registration: 20190131 Address after: No. 2266 Chaoyang South Street, Lianchi District, Baoding City, Hebei Province Patentee after: Jingcheng Engineering Automobile System Co., Ltd. Address before: No. 2266 Chaoyang South Street, Baoding City, Hebei Province, 071000 Patentee before: Changcheng Automobile Co., Ltd. |
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