CN102748427B - Vibration damper and speed changer - Google Patents
Vibration damper and speed changer Download PDFInfo
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- CN102748427B CN102748427B CN201210224727.9A CN201210224727A CN102748427B CN 102748427 B CN102748427 B CN 102748427B CN 201210224727 A CN201210224727 A CN 201210224727A CN 102748427 B CN102748427 B CN 102748427B
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- input shaft
- vibration damping
- damping equipment
- spline
- transmission input
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Abstract
The embodiment of the invention discloses a vibration damper and a speed changer, which relate to the technical field of power transmission systems, and are invented for solving the problem that the existing vibration damper has high technical difficulty. The vibration damper is pressed in an input shaft of the speed changer, and comprises a base body and an elastic part; the elastic part covers the surface of the base body; and the elastic part is in interference fit with spline teeth of the input shaft of the speed changer to form an interference part. The vibration damper is applied to the automobile speed changer.
Description
Technical field
The present invention relates to power transmission system technical field, particularly relate to a kind of vibration damping equipment and speed changer.
Background technique
Mechanical transmission is widely used in various industrial field, but in transmission process, usually there will be torsional vibration (referred to as torsional oscillation) in various degree.Not only affect normal power transmission, and all adverse influence is produced to the operation smoothness of overall vehicle and Noise measarement.
Such as, for car transmissions, the power of motor needs to be delivered on the driving wheel of vehicle by speed changer, and the bent axle of motor and transmission input shaft be generally by spline engage each other realize powerdriven.Due to the vibration of motor, the bent axle of motor can produce torsional oscillation, and transmission input shaft also can produce corresponding torsional oscillation, even make speed changer also can produce larger gears meshing sound when neutral gear.Therefore need the power transfer path between motor and speed changer configures vibration damping equipment, absorb (or suppression) gears meshing sound to make vehicle obtain good smoothness and lower noise in running.
Currently develop various torsional vibration damper, such as rubber damping device, silicone oil vibration damping equipment are generally be placed between the first quality of double mass flywheel and the second quality, first quality is connected on the bent axle of motor, second quality is connected on the input shaft of speed changer, when the irregular change of Engine torque, first quality and the second quality can bump against with vibration damping equipment, to limit relatively rotating of the first quality and the second quality.But realize the technical difficulty of above-mentioned double mass flywheel structure and cost relatively high, therefore developing a kind of vibration damping equipment technically comparatively easily realized is the task of top priority.
Summary of the invention
Embodiments of the invention provide a kind of vibration damping equipment and speed changer, with solving the high problem of the technical difficulty that realizes existing vibration damping equipment.
For achieving the above object, embodiments of the invention adopt following technological scheme:
A kind of vibration damping equipment, be fitted in transmission input shaft, comprise matrix and spring section, described spring section covers described matrix surface, and the spline tooth interference fit of described spring section and described transmission input shaft also forms interference portion.
Further, described interference portion is less than or equal to spline sideshake by the intermeshing transmission input shaft of spline and engine output shaft away from the distance of the end of described spline tooth and the flank profil of described spline tooth.
Secondly, the axial length of described vibration damping equipment is less than the axial length of described spline.
Further, the edge of described spring section equals the transverse tooth thickness of the spline of 0.1-0.2 described transmission input shaft doubly to the distance at the edge of described matrix.
Further, the radial dimension of the described vibration damping equipment tooth top that is less than described input shaft spline is to the distance of described vibration damping equipment radially end inwards.
Preferably, the cross section of described matrix is type structure, and upper half part of described type structure is located in the spline of described transmission input shaft, lower half portion is located in described transmission input shaft, and described elastomer covers the upper half part of described type structure.
Further, the circumferential size of upper half part of described type structure equals the transverse tooth thickness of the spline of 0.5-0.6 described transmission input shaft doubly; The circumferential size of the lower portion of described type structure equals the transverse tooth thickness of the spline of 3.0-4.0 described transmission input shaft doubly.
Preferably, described vibration damping equipment is more than or equal to 2 along described transmission input shaft quantity circumferentially.
Further, described spring section is high-abrasive material.
The embodiment of the present invention additionally provides a kind of speed changer, and comprise transmission input shaft, transmission output shaft and above-mentioned vibration damping equipment, described vibration damping equipment is fitted in described transmission input shaft.
In the vibration damping equipment that the embodiment of the present invention provides and speed changer, vibration damping equipment is arranged on transmission input shaft, due to described spring section and transmission input shaft spline tooth interference fit and form interference portion, therefore when engine luggine, the bent axle of motor produces torsional oscillation, spline tooth and the described spring section of the bent axle of motor bump against, described spring section will be extruded distortion, absorb torsional oscillation energy, to eliminate or to alleviate the fluctuating torque that motor is delivered to speed changer, thus the shock between reduction transmission gear before engagement, and then reduce the gear engagement noise of transmission neutral, simultaneously because described spring section covers described matrix surface, described matrix can improve the rigidity of described spline tooth, make that transmission of power is smooth-going carries out.By the above-mentioned analysis known embodiment of the present invention, vibration damping equipment has been simplified to damping block, only need be pressed in transmission input shaft, structure simply, solves the problem that the technical difficulty that realizes existing vibration damping equipment is high.
accompanying drawing explanation
Fig. 1 is the position relationship schematic diagram of embodiment of the present invention vibration damping equipment and transmission input shaft;
The position relationship schematic diagram of the spline tooth that Fig. 2 is vibration damping equipment shown in Fig. 1 and transmission input shaft;
Fig. 3 is the close-up schematic view in II region shown in Fig. 1;
Fig. 4 is the structural representation of embodiment of the present invention speed changer;
Fig. 5 is the close-up schematic view in I region shown in Fig. 4.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present invention transmission input shaft vibration damping equipment is described in detail.
Should be clear and definite, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
As depicted in figs. 1 and 2, embodiments provide a kind of vibration damping equipment, be fitted in transmission input shaft 10, comprise matrix 31 and spring section 32, spring section 32 covers the surface of matrix 31, and spline tooth 11 interference fit of spring section 32 and transmission input shaft 10 also forms interference portion 33.
The vibration damping equipment that the embodiment of the present invention provides is arranged on transmission input shaft, due to described spring section and transmission input shaft spline tooth interference fit and form interference portion, therefore when engine luggine, the bent axle of motor produces torsional oscillation, spline tooth and the described spring section of the bent axle of motor bump against, described spring section will be extruded distortion, absorb torsional oscillation energy, to eliminate or to alleviate the fluctuating torque that motor is delivered to speed changer, thus the shock between reduction transmission gear before engagement, and then reduce the gear engagement noise of transmission neutral, simultaneously because described spring section covers described matrix surface, described matrix can improve the rigidity of described spline tooth, make that transmission of power is smooth-going carries out.By the above-mentioned analysis known embodiment of the present invention, transmission input shaft vibration damping equipment has been simplified to damping block, only need be pressed in transmission input shaft, structure simply, solves the problem that the technical difficulty that realizes existing vibration damping equipment is high.
As shown in Figure 3, interference portion 33 can be less than or equal to by the spline sideshake of the intermeshing transmission input shaft 10 of spline with engine output shaft away from the distance d of the end of spline tooth 11 and the flank profil of spline tooth 11.
This is because the bent axle of motor and transmission input shaft are engaged each other by spline realize power transmission; therefore between the two spline tooth and tooth, usually backlash can be there is; and interference portion 33 is designed to be not more than described spline sideshake away from the distance d of the end of spline tooth 11 and the flank profil of spline tooth 11, be to make interference portion 33 not affect being connected with a joggle smoothly of engine output shaft and transmission input shaft.Such as d can equal the transverse tooth thickness of the spline 101 of the transmission input shaft 10 of 0.1 times.
Further, as shown in Figure 5, the axial length l of vibration damping equipment 3 is less than the axial length L of spline 101.This is because in order to ensure the better transmitting torque of transmission input shaft, need to ensure the rigidity of input shaft, if described vibration damping equipment the long rigidity that can weaken described input shaft of axial length, affect the normal delivery of moment of torsion.
Further, as shown in Figure 2, the edge of spring section 32 equals the transverse tooth thickness of the spline 101 of 0.1-0.2 transmission input shaft 10 doubly to the distance a (i.e. the thickness of spring section 32) at the edge of matrix 31.The transverse tooth thickness of spline is a underlying parameter of spline design, and for the spline of involute profile, transverse tooth thickness refers to the arc length between the flank profil of standard pitch circle upper spline tooth both sides.Described spring section is used to absorbing, if the thickness of spring section is too small, be not easy distortion after pressurized, absorbing performance is not good; If the thickness of spring section is excessive, be out of shape after pressurized and be not easy greatly to recover, cause vibration damping to lose efficacy, therefore the thickness in vibration damping portion should be suitable for.Prove through test, when a is the transverse tooth thickness of 0.15 times, shock attenuation result is best.
Further, as shown in Figure 2, the radial dimension g of the vibration damping equipment 3 tooth top B that is less than transmission input shaft spline 101 is to the distance f of vibration damping equipment 3 radially end C inwards.Like this, this is to ensure that described interference portion acts on the standard pitch circle of described spline tooth, so that assembling also plays damping effect better.
Preferably, as shown in Figures 2 and 3, the cross section of matrix 31 can be type structure, and upper half part of described type structure is located in the spline tooth 11 of transmission input shaft 10, lower half portion is located in transmission input shaft 10, and elastomer 32 covers the upper half part of described type structure.This is because vibration damping equipment is pressed in transmission input shaft, need to bear certain pressure, therefore certain compressive strength is needed, and described vibration damping equipment is designed to type structure, lower half portion of type structure is located in described input shaft and can increases cross-section area, improve compressive strength, avoid pressure break.Moreover upper half part of described type structure is located in the spline of described input shaft, by described interference portion vibration damping, therefore only the upper half part in type structure need be covered described spring section.
It should be noted that for above-described embodiment, described matrix can be the type structure of rule, also can be the class type structure that there is radian at edge, or other structure meeting above-mentioned performance requirement that the art can be expected.
Further preferably, as shown in Figure 2, the circumferential size b of upper half part of described type structure equals the transverse tooth thickness of the spline of 0.5-0.6 described transmission input shaft doubly; The circumferential size c of lower half portion of described type structure equals the transverse tooth thickness of the spline of 3.0-4.0 described transmission input shaft doubly.This is because the design of described type physical dimension will meet following requirement: good effectiveness in vibration suppression should be able to be realized on the one hand, too can not weaken again on the other hand the intensity of transmission input shaft and spline, and pressure when described type structure self can bear again press-in.The results showed that the size each side combination property of above-mentioned design is optimum.
Preferably, described vibration damping equipment can be more than or equal to 2 along described transmission input shaft quantity circumferentially, such as, can be 4, circumferentially be evenly arranged.The quantity of vibration damping equipment is determined according to the performance of motor self and the diameter of axle of transmission input shaft, can reach good effectiveness in vibration suppression, can not affect again the rigidity of transmission input shaft self.
Further, described spring section can be high-abrasive material.This is because when engine output torque vibrates, spline tooth on described bent axle clashes into spring section, and described spring section had both been squeezed power, and simultaneously also by frictional force, therefore described spring section adopts high-abrasive material to increase the service life, and strengthens effectiveness in vibration suppression.
As shown in Figure 4, the embodiment of the present invention additionally provides a kind of speed changer, and described speed changer comprises transmission input shaft 10, transmission output shaft 20 and the vibration damping equipment described by above-described embodiment 3, and described vibration damping equipment 3 is fitted in described transmission input shaft 10.
Because described speed changer have employed the vibration damping equipment 3 described by above-described embodiment, therefore, it is possible to eliminate or alleviate the fluctuating torque that motor is delivered to speed changer, thus the shock between reduction transmission gear before engagement, and then reduce the gear engagement noise of transmission neutral.
It should be noted that, Fig. 1 be shown in Fig. 4 along A-A to sectional view.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a vibration damping equipment, is fitted in transmission input shaft, it is characterized in that, comprises matrix and spring section, and described spring section covers described matrix surface, and the spline tooth interference fit of described spring section and described transmission input shaft also forms interference portion.
2. vibration damping equipment according to claim 1, is characterized in that, described interference portion is less than or equal to the spline sideshake by the intermeshing transmission input shaft of spline and engine output shaft away from the distance of the end of described spline tooth and the flank profil of described spline tooth.
3. vibration damping equipment according to claim 2, is characterized in that, the axial length of described transmission input shaft vibration damping equipment is less than the axial length of described spline.
4. vibration damping equipment according to claim 1, is characterized in that, the edge of described spring section equals the transverse tooth thickness of the spline of 0.1-0.2 described transmission input shaft doubly to the distance at the edge of described matrix.
5. vibration damping equipment according to claim 4, is characterized in that, the tooth top that the radial dimension of described vibration damping equipment is less than described transmission input shaft spline is to the distance of described vibration damping equipment radially end inwards.
6. the vibration damping equipment according to any one of claim 1-5, it is characterized in that, the cross section of described matrix is type structure, upper half part of described type structure is located in the spline of described input shaft, lower half portion is located in described input shaft, and described elastomer covers the upper half part of described type structure.
7. vibration damping equipment according to claim 6, is characterized in that, the circumferential size of upper half part of described type structure equals the transverse tooth thickness of the spline of 0.5-0.6 described transmission input shaft doubly; The circumferential size of lower half portion of described type structure equals the transverse tooth thickness of the spline of 3.0-4.0 described transmission input shaft doubly.
8. the vibration damping equipment according to any one of claim 1-4, is characterized in that, described vibration damping equipment is more than or equal to 2 along described transmission input shaft quantity circumferentially.
9. the vibration damping equipment according to any one of claim 1-4, is characterized in that, described spring section is high-abrasive material.
10. a speed changer, is characterized in that, comprising: transmission input shaft, transmission output shaft and the vibration damping equipment described in any one of claim 1-9, described vibration damping equipment is fitted in described transmission input shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210224727.9A CN102748427B (en) | 2012-06-29 | 2012-06-29 | Vibration damper and speed changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210224727.9A CN102748427B (en) | 2012-06-29 | 2012-06-29 | Vibration damper and speed changer |
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| Publication Number | Publication Date |
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| CN102748427A CN102748427A (en) | 2012-10-24 |
| CN102748427B true CN102748427B (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210224727.9A Active CN102748427B (en) | 2012-06-29 | 2012-06-29 | Vibration damper and speed changer |
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| Country | Link |
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| CN (1) | CN102748427B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646827A (en) * | 2003-01-24 | 2005-07-27 | Nok株式会社 | Method of manufacturing torsional damper |
| KR20070028986A (en) * | 2005-09-08 | 2007-03-13 | 주식회사 만도 | Motor-joint of electrical power steering system for in use vehicle |
| CN202064853U (en) * | 2010-12-28 | 2011-12-07 | 浙江志高机械有限公司 | External drill shank buffer damping device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH044323A (en) * | 1990-04-18 | 1992-01-08 | Taiho Kogyo Co Ltd | Damper coupling in spline joint part and damper coupling of engine equipped with separately placed auxiliary machine |
| US20030139217A1 (en) * | 2002-01-23 | 2003-07-24 | Lin Zhu | Shaft damper |
| JP4946649B2 (en) * | 2007-06-15 | 2012-06-06 | 日本精工株式会社 | Buffer member for power transmission mechanism and electric power steering device |
-
2012
- 2012-06-29 CN CN201210224727.9A patent/CN102748427B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646827A (en) * | 2003-01-24 | 2005-07-27 | Nok株式会社 | Method of manufacturing torsional damper |
| KR20070028986A (en) * | 2005-09-08 | 2007-03-13 | 주식회사 만도 | Motor-joint of electrical power steering system for in use vehicle |
| CN202064853U (en) * | 2010-12-28 | 2011-12-07 | 浙江志高机械有限公司 | External drill shank buffer damping device |
Non-Patent Citations (2)
| Title |
|---|
| JP平4-4323A 1992.01.08 * |
| JP特开2008-309260A 2008.12.25 * |
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| CN102748427A (en) | 2012-10-24 |
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