CN116557501A - Vibration reduction gear transmission shaft - Google Patents
Vibration reduction gear transmission shaft Download PDFInfo
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- CN116557501A CN116557501A CN202310830200.9A CN202310830200A CN116557501A CN 116557501 A CN116557501 A CN 116557501A CN 202310830200 A CN202310830200 A CN 202310830200A CN 116557501 A CN116557501 A CN 116557501A
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- vibration
- shaft
- transmission shaft
- damping
- vibration reduction
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 181
- 230000009467 reduction Effects 0.000 title claims abstract description 83
- 238000013016 damping Methods 0.000 claims abstract description 155
- 230000007246 mechanism Effects 0.000 claims abstract description 131
- 229910000831 Steel Inorganic materials 0.000 claims description 30
- 239000010959 steel Substances 0.000 claims description 30
- 238000005096 rolling process Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 12
- 230000001133 acceleration Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
- F16H55/02—Toothed members; Worms
- F16H55/17—Toothed wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C3/00—Shafts; Axles; Cranks; Eccentrics
- F16C3/02—Shafts; Axles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
- F16F15/12306—Radially mounted springs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/12—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon
- F16F15/121—Suppression of vibrations in rotating systems by making use of members moving with the system using elastic members or friction-damping members, e.g. between a rotating shaft and a gyratory mass mounted thereon using springs as elastic members, e.g. metallic springs
- F16F15/123—Wound springs
- F16F15/1232—Wound springs characterised by the spring mounting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/14—Suppression of vibrations in rotating systems by making use of members moving with the system using masses freely rotating with the system, i.e. uninvolved in transmitting driveline torque, e.g. rotative dynamic dampers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention relates to the technical field of gear transmission, in particular to a vibration reduction gear transmission shaft. The invention provides a vibration reduction gear transmission shaft which comprises a transmission shaft, at least one gear, at least one external shaft vibration reduction mechanism and at least one internal shaft vibration reduction mechanism, wherein the gear is coaxially fixed on the transmission shaft; at least one end of the transmission shaft is provided with a mounting hole, at least one in-shaft vibration damping mechanism is arranged in the mounting hole, and vibration transmitted to the mounting hole by the transmission shaft is eliminated through the in-shaft vibration damping mechanism; the external shaft vibration damping mechanism comprises an external clamp body, an internal ring body and a plurality of vibration damping springs. The vibration fluctuation of the transmission shaft is reduced to the greatest extent by the external shaft vibration reduction mechanism, the impact load between the gears and the transmission shaft is reduced, the vibration fluctuation generated by the meshing transmission between the gears is consumed by the internal shaft vibration reduction mechanism, and the impact load between the gears and the transmission shaft is reduced.
Description
Technical Field
The invention relates to the technical field of gear transmission, in particular to a vibration reduction gear transmission shaft.
Background
The gear transmission shaft is a cylindrical object penetrating through the middle of the gear, is a mechanical part for supporting and rotating the rotating gear and other parts on the shaft to transfer motion, torque or bending moment, and is a rotating body with high rotating speed and less support.
The existing gear transmission shaft comprises a transmission shaft and a driving gear arranged on the transmission shaft, and the transmission shaft and the driving gear arranged on the transmission shaft are driven to rotate through a driving device, so that a driven gear meshed with the driving gear is driven to rotate.
The existing gear transmission shaft is often subjected to journal abrasion, distortion, fracture and other phenomena in the transmission process, so that the normal operation of the gear transmission shaft is greatly influenced. One of the reasons that the gear transmission shaft is worn, distorted and broken is that the gear transmission shaft does not have a vibration damping function, and the meshing transmission between gears can generate quite large vibration amplitude, so that impact load between the gears and the transmission shaft is very easy to increase.
Disclosure of Invention
The invention solves the problems that: the existing gear transmission shaft does not have the function of vibration reduction, and the meshing transmission between gears can generate quite large vibration amplitude, so that impact load between the gears and the transmission shaft is very easy to increase.
(II) technical scheme
The vibration reduction gear transmission shaft comprises a transmission shaft, at least one gear, at least one external shaft vibration reduction mechanism and at least one internal shaft vibration reduction mechanism, wherein the gears are coaxially fixed on the transmission shaft;
at least one end of the transmission shaft is provided with a mounting hole, at least one in-shaft vibration damping mechanism is arranged in the mounting hole, and vibration transmitted to the mounting hole by the transmission shaft is eliminated through the in-shaft vibration damping mechanism;
the outer damping mechanism of axle includes outer clamp body, interior ring body and a plurality of damping spring, interior ring body with the coaxial setting of transmission shaft, rolling installation has a plurality of damping steel balls on the inner wall of interior ring body, a plurality of the damping steel balls simultaneously with the side of transmission shaft contacts, a plurality of damping spring all connect in between the lateral surface of interior ring body and the medial surface of outer clamp body.
As one embodiment of the invention, the inner wall of the inner ring body is provided with a mounting groove for mounting the vibration reduction steel balls, and the mounting groove is a circular groove.
As one embodiment of the invention, the inner wall of the inner ring body is provided with a plurality of mounting grooves for mounting the vibration reduction steel balls, the plurality of mounting grooves are arranged at intervals, at least one vibration reduction steel ball is mounted in each mounting groove in a rolling way, and the mounting grooves are arc-shaped grooves.
As one embodiment of the invention, the outer clamp body is an isosceles triangle frame, and one damping spring is connected between each side frame of the isosceles triangle frame and the inner ring body.
As one embodiment of the invention, the outer clamp body is a regular hexagonal frame, and one vibration damping spring is connected between each frame of the regular hexagonal frame and the inner ring body.
As one embodiment of the invention, the number of the in-shaft vibration reduction mechanisms is at least two, one in-shaft vibration reduction mechanism is arranged in the transmission shaft corresponding to each outer clamp body, and one in-shaft vibration reduction mechanism is also arranged in the transmission shaft corresponding to the gear.
As one embodiment of the present invention, the in-shaft vibration damping mechanism includes a vibration damping mass block and a plurality of elastic dampers, the vibration damping mass block is a sphere or a cylinder, the sphere and the transmission shaft are coaxially arranged, and the plurality of elastic dampers are connected between the sphere and the inner wall of the transmission shaft.
As one embodiment of the invention, the elastic dampers of the same in-shaft vibration reduction mechanism are positioned in the same plane vertical to the central axis of the transmission shaft, the elastic dampers of the same in-shaft vibration reduction mechanism are uniformly distributed around the circumferential direction of the central axis of the transmission shaft,
in the in-shaft vibration damping mechanism, a first in-shaft vibration damping mechanism corresponding to the outer clamp body and a second in-shaft vibration damping mechanism corresponding to the gear are arranged,
the transmission shaft is of a hollow structure, the vibration damping mass blocks of the vibration damping mechanisms in the shafts are connected into a whole to form an integral cylinder vibration damping mass block, the length of the cylinder vibration damping mass block is smaller than or equal to that of the transmission shaft,
the elastic damper of the first in-shaft vibration reduction mechanism is obliquely arranged, so that an included angle is formed between the elastic damper and the radial direction of the transmission shaft,
the elastic damper of the second in-shaft vibration reduction mechanism is arranged along the radial direction of the transmission shaft.
As an embodiment of the present invention, the inclination direction of the elastic damper of the first in-shaft vibration damping mechanism is opposite to the rotation direction of the transmission shaft, so that the elastic damper of the first in-shaft vibration damping mechanism pushes the vibration damping mass block to rotate along with the transmission shaft in a compressed state at the initial stage of rotation of the transmission shaft, the transmission shaft stops the rotation stage, and the elastic damper of the first in-shaft vibration damping mechanism blocks the rotation of the vibration damping mass block in a stretched state.
As an embodiment of the invention, the elastic damper of the first in-shaft vibration damping mechanism is tangential to the outer side wall of the vibration damping mass.
As one embodiment of the invention, hooks are respectively formed at two ends of the elastic damper, a plurality of first pendants are connected on the sphere at intervals around the axis of the sphere, a plurality of second pendants are connected on the inner wall of the transmission shaft at equal intervals around the axis of the transmission shaft, and the hooks at two ends of the elastic damper respectively hook the first pendants and the second pendants.
As one embodiment of the invention, each included angle of the isosceles triangle frame is provided with one vibration damping spring, the other end of the vibration damping spring is connected to the inner ring body, and the bisector of the included angle is parallel to the vibration damping spring.
As one embodiment of the invention, the gear is arranged on the transmission shaft in the middle, the two ends of the transmission shaft are provided with mounting holes, the number of the external vibration damping mechanisms is two, and the two external vibration damping mechanisms are respectively arranged at the two ends of the transmission shaft.
As an embodiment of the present invention, a plurality of in-shaft vibration reducing mechanisms are mounted in each of the mounting holes in sequence along the axis of the transmission shaft.
The beneficial effects of the invention are as follows:
1. the invention provides a vibration reduction gear transmission shaft which comprises a transmission shaft, at least one gear, at least one external shaft vibration reduction mechanism and at least one internal shaft vibration reduction mechanism, wherein the gear is coaxially fixed on the transmission shaft; at least one end of the transmission shaft is provided with a mounting hole, at least one in-shaft vibration damping mechanism is arranged in the mounting hole, and vibration transmitted to the mounting hole by the transmission shaft is eliminated through the in-shaft vibration damping mechanism; the outer shaft vibration reduction mechanism comprises an outer clamp body, an inner ring body and a plurality of vibration reduction springs, the inner ring body and the transmission shaft are coaxially arranged, a plurality of vibration reduction steel balls are arranged on the inner wall of the inner ring body in a rolling manner, the plurality of vibration reduction steel balls are simultaneously contacted with the side surface of the transmission shaft, and the plurality of vibration reduction springs are connected between the outer side surface of the inner ring body and the inner side surface of the outer clamp body;
the external vibration reduction mechanism mainly eliminates the vibration of the transmission shaft, because the external clamp body is fixed on a machine tool or a vehicle body, the external clamp body is fixed, when the transmission shaft rotates, the vibration reduction steel balls roll along with the rotation of the transmission shaft due to the contact of the vibration reduction steel balls with the transmission shaft, so that a part of vibration energy is consumed, and meanwhile, a part of vibration energy of the transmission shaft is transmitted to the inner ring body, and the inner ring body is connected to the external clamp body through the vibration reduction spring, so that the vibration reduction spring is continuously deformed, and meanwhile, the inner ring body is continuously vibrated under the influence of the deformation of the vibration reduction spring and the vibration of the vibration reduction steel balls, so that most of vibration energy is consumed, and finally, the vibration is transmitted to the external clamp body, so that the vibration reduction effect is improved, the vibration fluctuation of the transmission shaft is reduced to the greatest extent, and the impact load between the gear and the transmission shaft is reduced;
in addition, part of vibration fluctuation generated in the meshing transmission process of the gears is transmitted to the transmission shaft and then transmitted along the axis of the transmission shaft, and then the vibration fluctuation is transmitted into the mounting hole and eliminated by the in-shaft vibration reduction mechanism in the mounting hole, so that the vibration fluctuation generated in the meshing transmission between the gears is consumed, and further the impact load between the gears and the transmission shaft is further reduced;
2. the vibration damping effect of different positions on the transmission shaft is further coordinated, further, when the gear is positioned at the middle position of the transmission shaft, the disturbance degree of the transmission shaft is maximum, and the vibration transmitted to the transmission shaft by the gear is basically in the radial direction, so that the elastic damper of the second shaft inner vibration damping mechanism is arranged along the radial direction of the transmission shaft, and can be used for directly damping the vibration;
3. when the vibration damping mechanism is in a compressed state, the elastic damper of the vibration damping mechanism in the first shaft pushes the vibration damping mass block to rotate along with the transmission shaft, so that the starting safety is greatly ensured, and the starting acceleration of the transmission shaft of the gear is greatly improved, thereby realizing quick starting; in particular, in this mode, the rotational thrust of the damper mass is mainly borne by the elastic damper of the first in-shaft damper mechanism, so that the risk of the elastic damper of the second in-shaft damper mechanism being excessively twisted during starting is reduced, and therefore the safety of the elastic damper of the second in-shaft damper mechanism is further improved, and the elastic damper of the first in-shaft damper mechanism is in an extended and stretched state during stopping, so that the elastic damper of the first in-shaft damper mechanism can be more stable during stopping.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of an embodiment of the present invention;
FIG. 2 is a block diagram of a drive shaft, gears and an in-shaft vibration reduction mechanism provided by an embodiment of the present invention;
FIG. 3 is a block diagram of a drive shaft and an in-shaft vibration reduction mechanism provided by an embodiment of the present invention;
fig. 4 is a schematic perspective view of an off-axis vibration damping mechanism according to an embodiment of the present invention.
Icon: 1-a transmission shaft; 2-an elastic damper; 3-a vibration damping mass; 4-gear; 5-an outer clamp; 6-an inner ring body; 7-vibration damping springs.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1-4, one embodiment of the present invention provides a vibration damping gear drive shaft, comprising a drive shaft 1, at least one gear 4, at least one off-axis vibration damping mechanism and at least one on-axis vibration damping mechanism, the gear 4 being coaxially fixed to the drive shaft 1;
at least one end of the transmission shaft 1 is provided with a mounting hole, at least one in-shaft vibration damping mechanism is arranged in the mounting hole, and vibration transmitted to the mounting hole by the transmission shaft 1 is eliminated through the in-shaft vibration damping mechanism;
the outer damping mechanism of axle includes outer clamp body 5, inner ring body 6 and a plurality of damping spring 7, and inner ring body 6 and transmission shaft 1 coaxial setting have a plurality of damping steel balls on the inner wall of inner ring body 6 roll, and a plurality of damping steel balls contact with the side of transmission shaft 1 simultaneously, and a plurality of damping spring 7 all are connected between the lateral surface of inner ring body 6 and the medial surface of outer clamp body 5.
The vibration of the transmission shaft 1 is mainly eliminated by the vibration reduction mechanism outside the shaft, because the outer clamp body 5 is fixed on a machine tool or a vehicle body, the outer clamp body 5 is fixed, when the transmission shaft 1 rotates, the vibration reduction steel balls are contacted with the transmission shaft 1, so that the vibration reduction steel balls roll along with the rotation of the transmission shaft 1, further, a part of vibration energy of the transmission shaft 1 is consumed, meanwhile, a part of vibration energy of the transmission shaft 1 is transmitted to the inner ring body 6, and the inner ring body 6 is connected to the outer clamp body 5 through the vibration reduction spring 7, so that the vibration reduction spring 7 is continuously deformed, meanwhile, the inner ring body 6 is continuously vibrated under the influence of the deformation of the vibration reduction spring 7 and the vibration of the vibration reduction steel balls, further, most of vibration energy is consumed, and finally, the vibration is transmitted to the outer clamp body 5, so that the vibration reduction effect is improved, the vibration fluctuation of the transmission shaft 1 is reduced to the greatest extent, and the impact load between the gear 4 and the transmission shaft 1 is reduced.
In addition, a part of vibration fluctuation generated in the process of meshing transmission of the gear 4 and the other gear or rack is transmitted to the transmission shaft 1, then transmitted along the axis of the transmission shaft 1, and further transmitted into the mounting hole, and consumed by the in-shaft vibration damping mechanism in the mounting hole.
Preferably, as shown in fig. 1, the gear 4 is centrally mounted on the transmission shaft 1, the two ends of the transmission shaft 1 are provided with mounting holes, each mounting hole is internally provided with an in-shaft vibration damping mechanism, two out-of-shaft vibration damping mechanisms are arranged, the two out-of-shaft vibration damping mechanisms are respectively mounted at the two ends of the transmission shaft 1, and the two out-of-shaft vibration damping mechanisms are close to the mounting holes.
As a further preferred embodiment, the number of the in-shaft vibration reducing mechanisms is at least two, one in-shaft vibration reducing mechanism is disposed in the transmission shaft 1 corresponding to each outer clamping body 5, and one in-shaft vibration reducing mechanism is also disposed in the transmission shaft 1 corresponding to the gear 4. When the gear 4 and the transmission shaft 1 rotate, in addition to vibration caused by vibration conduction of other components, for the gear transmission shaft assembly, the rotation of the gear 4 is the main vibration source at the gear 4, and the vibration conduction of the component meshed with the gear 4 is the main vibration source at the gear 4, and in the rotation of the transmission shaft 1, because the transmission shaft is a rod structure, vibration caused by disturbance during rotation is also an important factor, and the convergence of the factors makes the position of the gear 4 and the position of the outer clamp 5 as core factors in the rotation of the gear transmission shaft. Particularly, during vibration, the vibration of the gear 4 position is also transmitted to the outer clamp 5 position, so that the vibration condition of the outer clamp 5 position is further deteriorated and complicated, and similarly, the vibration condition of the gear 4 position is also deteriorated and complicated, so that the vibration condition of the gear transmission shaft is complicated, the precise transmission is not facilitated, and great difficulty is brought to structural design. Therefore, in this application, the in-shaft vibration damping mechanism is disposed in each outer clamp 5 and gear 4 corresponding to the transmission shaft 1, so that vibration can be damped directly at the positions of the outer clamp 5 and the gear 4, and the vibration at a single position can be directly reduced, in particular, adverse effects of vibration at the position on vibration at other positions can be reduced, and further risks of mutual deterioration among the vibrations at each position are reduced, so that stress and vibration conditions of the structure are clearer, and design work is greatly simplified.
Specifically, in this embodiment, as shown in fig. 2, the in-shaft vibration damping mechanism includes a vibration damping mass block 3 and five elastic dampers 2, where the elastic dampers 2 in this application may be springs as shown in fig. 2 and 3, or may be a cylinder or an oil cylinder structure with elastic extension and elastic contraction, the vibration damping mass block 3 is a sphere or a cylinder, and the sphere is coaxially disposed with the transmission shaft 1, and the five elastic dampers 2 are all connected between the sphere and an inner wall of the transmission shaft 1.
As a further preferred embodiment, the elastic dampers 2 of the same in-shaft vibration reduction mechanism are positioned in the same plane perpendicular to the central axis of the transmission shaft 1, the elastic dampers 2 of the same in-shaft vibration reduction mechanism are uniformly distributed around the circumferential direction of the central axis of the transmission shaft 1,
in the in-shaft vibration damping mechanism, a first in-shaft vibration damping mechanism corresponding to the outer clamp body 5, a second in-shaft vibration damping mechanism corresponding to the gear 4,
the transmission shaft 1 is of a hollow structure, the vibration damping mass blocks 3 of the vibration damping mechanisms in the shafts are connected into a whole to form an integral cylinder vibration damping mass block 3, the length of the cylinder vibration damping mass block 3 is smaller than or equal to the length of the transmission shaft 1,
the elastic damper 2 of the first in-shaft vibration reduction mechanism is arranged obliquely, so that an included angle is formed between the elastic damper 2 and the radial direction of the transmission shaft 1, and the included angle formed between the elastic damper 2 and the radial direction of the transmission shaft 1 is not equal to 0,
the elastic damper 2 of the second in-shaft vibration reduction mechanism is arranged along the radial direction of the transmission shaft 1.
In the present embodiment, firstly, by connecting the damper masses 3 of the respective in-shaft damper mechanisms together, firstly, the vibration damper effects of the different positions on the drive shaft 1 are further coordinated, and further, when the gear 4 is located at the middle position of the drive shaft 1, the deflection of the drive shaft 1 is the greatest here, and the vibrations transmitted to the drive shaft 1 by the gear 4 are also substantially in the radial direction, so that the vibration dampers 2 of the in-shaft damper mechanisms are arranged in the radial direction of the drive shaft 1, and can be damped more directly, and at the same time, since the position is the middle position of the drive shaft 1, the elastic dampers 2 of the in-shaft damper mechanisms also play a role of supporting the damper masses 3, and the elastic dampers 2 are arranged in the radial direction of the drive shaft 1, the damper mass 3 can be supported more reliably and stably in the drive shaft 1, and also for this reason the requirement of the elastic damper 2 of the first in-shaft damper mechanism for the support of the damper mass 3 can be weakened, that is, because the elastic damper 2 of the second in-shaft damper mechanism serves as the main support structure of the damper mass 3, the elastic damper 2 of the first in-shaft damper mechanism can serve only as the auxiliary support structure of the damper mass 3, whereby the effect of damping the drive shaft 1 can be taken into account more in designing the elastic damper 2 of the first in-shaft damper mechanism, and further, in this case, the elastic damper 2 of the first in-shaft damper mechanism can be arranged obliquely, so that the damping of more directions and mechanical components can be provided, and further the damping effect can be improved, the method is suitable for complex vibration conditions under complex working conditions.
As a further preferred embodiment, the inclination direction of the elastic damper 2 of the first in-shaft vibration damping mechanism is opposite to the rotation direction of the transmission shaft 1, so that the elastic damper 2 of the first in-shaft vibration damping mechanism pushes the vibration damping mass block 3 to rotate with the transmission shaft 1 in a compressed state at the initial stage of rotation of the transmission shaft 1, the transmission shaft 1 stops the rotation stage, and the elastic damper 2 of the first in-shaft vibration damping mechanism blocks the rotation of the vibration damping mass block 3 in a stretched state. In this way, when the rotation starts, the transmission shaft 1 gradually rotates, and drives the vibration damping mass block 3 to rotate through the elastic damper 2, because no matter the vibration damping spring or the vibration damping cylinder, when the vibration damping cylinder or the vibration damping cylinder reaches the compression limit, the vibration damping cylinder or the vibration damping cylinder can not be further deformed but can not be damaged, but when the vibration damping cylinder or the air pipe reaches the stretching elastic limit, if the vibration damping cylinder or the air pipe reaches the stretching elastic limit, the vibration damping cylinder or the air pipe is subjected to plastic deformation, and the corresponding vibration damping cylinder or the air pipe is difficult to elastically recover, and when the vibration damping cylinder or the air pipe reaches the stretching elastic limit, the piston is easy to fall off and other irreversible damage, so in this scheme, due to the inclined arrangement of the elastic damper 2 of the vibration damping mechanism in the first shaft, the vibration damping mechanism in the first shaft 1 is started in a rotation stage of the other directions, the elastic damper 2 of the vibration damping mechanism in the first shaft pushes the vibration damping mass block 3 to rotate along with the transmission shaft 1 in a compression state, so that the starting safety of the gear transmission shaft is greatly ensured, and the starting acceleration of the gear transmission shaft is greatly improved, and the gear is further started rapidly; in particular, in this mode, the rotational thrust of the damper mass 3 is mainly borne by the elastic damper 2 of the first in-shaft damper mechanism, and the risk of the elastic damper 2 of the second in-shaft damper mechanism being excessively twisted upon activation is reduced, so that the safety of the elastic damper 2 of the second in-shaft damper mechanism is further improved. When the damper is stopped, the elastic damper 2 of the first in-shaft vibration damping mechanism is in an extended state, so that the damper can be more stable when stopped.
Further preferably, the elastic damper 2 of the first in-shaft vibration reduction mechanism is tangent to the outer side wall of the vibration reduction mass 3.
Further, the included angles formed between the five elastic dampers 2 are the same, that is, the five elastic dampers 2 are located in the same plane, and the five elastic dampers 2 are equidistantly arranged, so that vibration can be more balanced and counteracted.
As shown in fig. 2, hooks are respectively formed at two ends of the elastic damper 2, a plurality of first pendants are connected on the sphere at intervals around the axis of the sphere, a plurality of second pendants are connected on the inner wall of the transmission shaft 1 at equal intervals around the axis of the transmission shaft 1, and the hooks at two ends of the elastic damper 2 hook the first pendants and the second pendants respectively so as to install the in-shaft vibration reduction mechanism.
Optionally, one end of the elastic damper 2 is formed with a hook, the sphere is connected with a plurality of first pendants around the axis of the sphere at intervals, the hook of the elastic damper 2 hooks the first pendants on the sphere, and the other end of the elastic damper 2 can be welded on the inner wall of the transmission shaft 1.
Optionally, the number of the elastic dampers 2 is not specifically limited, and the elastic dampers 2 are reasonably arranged according to spheres with different diameters, for example, when the diameter of the sphere is larger, the number of the elastic dampers 2 is increased, and when the diameter of the sphere is smaller, the number of the elastic dampers 2 is appropriately reduced, so that the elastic dampers are suitable for mounting holes with different diameters, and therefore the vibration reduction effect is better achieved.
Optionally, the mounting holes are all seted up at the both ends of transmission shaft 1, install a plurality of in-axle damping mechanisms in proper order along the axis of transmission shaft 1 in every mounting hole, and the interval between the adjacent in-axle damping mechanisms is the same, and vibration ripple in the transmission shaft 1 mounting hole is offset simultaneously to the in-axle damping mechanism of multiunit, can play fine damping effect.
In addition, the length of the transmission shaft 1 and the depth of the mounting hole can influence the number of the in-shaft vibration reduction mechanisms, when the length of the transmission shaft 1 is long, the depth in the mounting hole is proper deep, so that more in-shaft vibration reduction mechanisms can be mounted, when the length of the transmission shaft 1 is short, the depth in the mounting hole is proper shallow, and a plurality of groups of in-shaft vibration reduction mechanisms do not need to be mounted.
Optionally, the number of the in-shaft vibration reducing mechanisms is at least two, an in-shaft vibration reducing mechanism is arranged in the transmission shaft 1 corresponding to each outer clamp body 5, and an in-shaft vibration reducing mechanism is also arranged in the transmission shaft 1 corresponding to the gear 4.
Alternatively, a plurality of groups of elastic dampers 2 are arranged on the surface of the sphere, but the elastic dampers 2 are not in the same plane, but one ends of the elastic dampers 2 on the upper half of the sphere are connected to the inner wall of the transmission shaft 1, one ends of the elastic dampers 2 on the lower half of the sphere are connected to the inner wall of the transmission shaft 1, the elastic dampers are distributed in an explosive manner, and the natural lengths of the elastic dampers 2 are different. In this way, the plurality of elastic dampers 2 can be connected to the greatest extent in a limited space, and the vibration damping effect can be further improved.
In this way, a part of vibration fluctuation generated in the meshing transmission process of the gear 4 and the other gear or the rack is consumed by the in-shaft vibration reduction mechanism in the mounting hole, so that the vibration amplitude generated in the meshing transmission between the gears is consumed, and the impact load between the gear 4 and the transmission shaft 1 is further reduced.
Preferably, in this embodiment, as shown in fig. 4, the external vibration damping mechanism of the shaft includes an external clamping body 5, an internal ring body 6 and a plurality of vibration damping springs 7, the internal ring body 6 is in a ring shape, the internal ring body 6 and the transmission shaft 1 are coaxially arranged, the internal diameter of the internal ring body 6 is slightly larger than the diameter of the transmission shaft 1, a plurality of vibration damping steel balls are mounted on the inner wall of the internal ring body 6 in a rolling manner, and simultaneously contact with the side surface of the transmission shaft 1, wherein the external clamping body 5 is an isosceles triangle frame, a vibration damping spring 7 is connected between each frame of the isosceles triangle frame and the internal ring body 6, the vibration damping spring 7 is located in the middle of the frame, each vibration damping spring 7 is perpendicular to the frame, and the vibration damping springs 7 are connected between the outer side surface of the internal ring body 6 and the inner side surface of the external clamping body 5.
Because the vibration damping steel ball contacts with the transmission shaft 1, the vibration damping steel ball rolls along with the rotation of the transmission shaft 1, and then a part of vibration energy is consumed, meanwhile, a part of vibration energy of the transmission shaft 1 is transmitted to the inner ring body 6, and the inner ring body 6 is connected to the outer clamp body 5 through the vibration damping spring 7, so that the vibration damping spring 7 is continuously deformed, the inner ring body 6 is continuously vibrated under the influence of the deformation of the vibration damping spring 7 and the vibration of the vibration damping steel ball, and most of vibration energy is consumed, and finally the vibration is transmitted to the outer clamp body 5, so that the vibration damping effect is improved, and the vibration fluctuation of the transmission shaft 1 is reduced to the greatest extent.
Optionally, a plurality of mounting grooves for mounting vibration-damping steel balls are formed in the inner wall of the inner ring body 6, the mounting grooves are arc-shaped grooves, the plurality of mounting grooves are arranged at intervals, and each mounting groove is internally provided with one vibration-damping steel ball in a rolling mode. For example, 12 damping steel balls are arranged, twelve mounting grooves are formed, the radian corresponding to each mounting groove is 25 degrees, namely, each damping steel ball can only roll in the mounting groove with the radian of 25 degrees. Because the vibration-damping steel balls are limited, the vibration-damping steel balls cannot collide with each other and contact with the side face of the transmission shaft 1 more uniformly, and the energy consumption efficiency is improved.
Optionally, a damping spring 7 is installed at each included angle of the isosceles triangle frame, the other end of the damping spring 7 is connected to the outer side face of the inner ring body 6, the bisector of the included angle is parallel to the damping spring 7, namely, the damping spring 7 bisects the included angle of the isosceles triangle frame into two halves, 30 degrees respectively, so that vibration fluctuation of the inner ring body 6 can be transmitted to the three damping springs 7, the speed of vibration transmission to the outer clamp body 5 is further accelerated, and part of vibration energy can be consumed.
Optionally, in this embodiment, the outer clip body 5 is a regular hexagonal frame, and a damping spring 7 is connected between each frame of the regular hexagonal frame and the inner ring body 6, and compared with an isosceles triangle frame, six damping springs 7 are totally installed, and the number of damping springs 7 that can be installed by the regular hexagonal frame is more, so that the speed of vibration transmission to the outer clip body 5 is increased, and vibration energy can be consumed more uniformly.
In addition, the outer clip body 5 may be provided as a regular pentagonal frame, a regular octagon frame, a regular decagon frame, and the like.
In summary, in the transmission process of the transmission shaft 1, the external vibration damping mechanism is additionally arranged, so that the external vibration damping mechanism eliminates the vibration of the transmission shaft 1, the vibration damping effect is improved, the vibration fluctuation of the transmission shaft 1 is reduced to the greatest extent, the impact load between the gear 4 and the transmission shaft 1 is reduced, and the internal vibration damping mechanism is additionally arranged, so that the vibration fluctuation generated by the meshing transmission between the gears is consumed by the internal vibration damping mechanism, and the impact load between the gear 4 and the transmission shaft 1 is further reduced.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (10)
1. The vibration reduction gear transmission shaft is characterized by comprising a transmission shaft (1), at least one gear (4), at least one external shaft vibration reduction mechanism and at least one internal shaft vibration reduction mechanism, wherein the gear (4) is coaxially fixed on the transmission shaft (1);
at least one end of the transmission shaft (1) is provided with a mounting hole, at least one in-shaft vibration damping mechanism is arranged in the mounting hole, and vibration transmitted to the mounting hole by the transmission shaft (1) is eliminated through the in-shaft vibration damping mechanism;
the outer damping mechanism of axle includes outer clamp body (5), interior ring body (6) and a plurality of damping spring (7), interior ring body (6) with transmission shaft (1) coaxial setting, roll on the inner wall of interior ring body (6) and install a plurality of damping steel balls, a plurality of the damping steel balls simultaneously with the side of transmission shaft (1) contacts, a plurality of damping spring (7) all connect in between the lateral surface of interior ring body (6) and the medial surface of outer clamp body (5).
2. The vibration reduction gear transmission shaft according to claim 1, wherein a mounting groove for mounting the vibration reduction steel balls is formed in the inner wall of the inner ring body (6), and the mounting groove is a circular groove.
3. The vibration reduction gear transmission shaft according to claim 1, wherein a plurality of mounting grooves for mounting the vibration reduction steel balls are formed in the inner wall of the inner ring body (6), the plurality of mounting grooves are arranged at intervals, at least one vibration reduction steel ball is mounted in each mounting groove in a rolling mode, and the mounting grooves are arc-shaped grooves.
4. A vibration reduction gear transmission shaft according to claim 2, characterized in that the outer clamp body (5) is an isosceles triangle, and one vibration reduction spring (7) is connected between each frame of the isosceles triangle and the inner ring body (6).
5. The vibration reduction gear transmission shaft according to claim 4, wherein the gear (4) is centrally installed on the transmission shaft (1), both ends of the transmission shaft (1) are provided with installation holes, two external vibration reduction mechanisms are provided, and the two external vibration reduction mechanisms are respectively installed at both ends of the transmission shaft (1).
6. A vibration-damping gear drive shaft according to any one of claims 1-5, characterized in that the number of in-shaft vibration-damping mechanisms is at least two, an in-shaft vibration-damping mechanism is arranged in the drive shaft (1) corresponding to each outer clamping body (5), and an in-shaft vibration-damping mechanism is also arranged in the drive shaft (1) corresponding to the gear (4).
7. A vibration-damping gear drive shaft according to claim 6, characterized in that the in-shaft vibration-damping mechanism comprises a vibration-damping mass block (3) and a plurality of elastic dampers (2), the vibration-damping mass block (3) is a sphere or a cylinder, the sphere is coaxially arranged with the drive shaft (1), and the plurality of elastic dampers (2) are connected between the sphere and the inner wall of the drive shaft (1).
8. A vibration reduction gear drive shaft according to claim 7, wherein the elastic dampers (2) of the same in-shaft vibration reduction mechanism are located in the same plane perpendicular to the central axis of the drive shaft (1), the elastic dampers (2) of the same in-shaft vibration reduction mechanism are uniformly distributed around the circumferential direction of the central axis of the drive shaft (1),
in the in-shaft vibration reduction mechanism, a first in-shaft vibration reduction mechanism corresponds to the outer clamp body (5), a second in-shaft vibration reduction mechanism corresponds to the gear (4),
the transmission shaft (1) is of a hollow structure, the vibration damping mass blocks (3) of the vibration damping mechanisms in the shafts are connected into a whole to form an integral cylinder vibration damping mass block (3), the length of the cylinder vibration damping mass block (3) is smaller than or equal to the length of the transmission shaft (1),
the elastic damper (2) of the first in-shaft vibration reduction mechanism is obliquely arranged, so that an included angle is formed between the elastic damper (2) and the radial direction of the transmission shaft (1),
the elastic damper (2) of the second in-shaft vibration reduction mechanism is arranged along the radial direction of the transmission shaft (1).
9. A vibration reducing gear drive shaft according to claim 8, characterized in that the elastic damper (2) of the first in-shaft vibration reducing mechanism is inclined in a direction opposite to the rotation direction of the drive shaft (1) such that the elastic damper (2) of the first in-shaft vibration reducing mechanism pushes the vibration reducing mass (3) to rotate with the drive shaft (1) in a compressed state, the drive shaft (1) stops the rotation stage, and the elastic damper (2) of the first in-shaft vibration reducing mechanism blocks the rotation of the vibration reducing mass (3) in a stretched state.
10. A vibration reducing gear drive shaft according to claim 9, characterized in that the elastic damper (2) of the first in-shaft vibration reducing mechanism is tangential to the outer side wall of the vibration reducing mass (3).
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| CN202310830200.9A CN116557501B (en) | 2023-07-07 | 2023-07-07 | Vibration reduction gear transmission shaft |
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| CN202310830200.9A CN116557501B (en) | 2023-07-07 | 2023-07-07 | Vibration reduction gear transmission shaft |
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