CN110748636A - Noise reduction method and device for hydraulic gear selecting and shifting actuator - Google Patents
Noise reduction method and device for hydraulic gear selecting and shifting actuator Download PDFInfo
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- CN110748636A CN110748636A CN201911151465.6A CN201911151465A CN110748636A CN 110748636 A CN110748636 A CN 110748636A CN 201911151465 A CN201911151465 A CN 201911151465A CN 110748636 A CN110748636 A CN 110748636A
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- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000011156 evaluation Methods 0.000 claims abstract description 61
- 238000012545 processing Methods 0.000 claims abstract description 15
- 238000013016 damping Methods 0.000 claims description 23
- 238000011946 reduction process Methods 0.000 claims description 9
- 229920000742 Cotton Polymers 0.000 claims description 7
- 230000035939 shock Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000007769 metal material Substances 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 3
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001228 spectrum Methods 0.000 description 15
- 230000005540 biological transmission Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
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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
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H59/0208—Selector apparatus with means for suppression of vibrations or reduction of noise
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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
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
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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
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- Acoustics & Sound (AREA)
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Abstract
The invention relates to the technical field of vehicle noise reduction, in particular to a noise reduction method for a hydraulic gear selecting and shifting actuator, which comprises the following steps of S1, judging whether each part of the hydraulic gear selecting and shifting actuator is a noise reduction interference factor or not when the hydraulic gear selecting and shifting actuator works, and outputting a judgment result; s2, according to the judgment result, carrying out noise reduction processing on each part of the hydraulic gear selecting and shifting actuator which is taken as a noise reduction interference factor to form a noise-reduced hydraulic gear selecting and shifting actuator; step S3, carrying out noise evaluation on the hydraulic gear selecting and shifting actuator after noise reduction to obtain an actual noise reduction score; step S4, the actual noise reduction score is compared with a preset noise reduction target value, and whether the hydraulic gear selecting and shifting actuator after noise reduction meets the noise reduction requirement is judged according to the comparison result: if yes, quitting; if not, the process returns to step S2. The beneficial effects of the above technical scheme are: the working noise generated in the vehicle when the hydraulic gear selecting and shifting actuator works is reduced.
Description
Technical Field
The invention relates to the technical field of vehicle noise reduction, in particular to a noise reduction method and a noise reduction device for a hydraulic gear selecting and shifting actuator.
Background
Aiming at the driving evaluation of the vehicle, the working noise of the hydraulic gear selecting and shifting actuator is larger when the whole vehicle is electrified but the engine is not in a starting state, and the prior art does not provide a method or a device capable of solving the problem that the in-vehicle decibel value is too high due to direct or indirect generation of the hydraulic gear selecting and shifting actuator.
Disclosure of Invention
In order to solve the existing problems, a noise reduction method for a hydraulic gear selecting and shifting actuator is provided, which is applied to the working noise of the hydraulic gear selecting and shifting actuator, and is characterized by comprising the following steps:
step S1, when the hydraulic gear selecting and shifting actuator works, judging whether each part of the hydraulic gear selecting and shifting actuator is a noise-reducing interference factor or not, and outputting a judgment result;
step S2, according to the judgment result, noise reduction processing is carried out on each part of the hydraulic gear selecting and shifting actuator which is taken as the noise reduction interference factor, so as to form the hydraulic gear selecting and shifting actuator after noise reduction;
step S3, carrying out noise evaluation on the hydraulic gear selecting and shifting actuator after noise reduction to obtain an actual noise reduction score;
step S4, the actual noise reduction score is compared with a preset noise reduction target value, and whether the hydraulic gear selecting and shifting actuator after noise reduction meets the noise reduction requirement is judged according to the comparison result:
if yes, quitting;
if not, the process returns to step S2.
Preferably, in step S1, the method for determining whether a part of the hydraulic gear selecting and shifting actuator is a noise-reducing interference factor includes:
step S11, carrying out noise evaluation on one part of the hydraulic gear selecting and shifting actuator to obtain a noise evaluation result;
step S12, after the primary noise reduction processing is carried out on the evaluated part, the noise evaluation is carried out again to obtain the noise reduction evaluation result;
step S13, according to the noise evaluation result and the noise reduction evaluation result, judging whether the evaluated part is the noise-reducing interference factor, and outputting the judgment result;
and after the steps S11-S13 are executed for all the parts of the hydraulic gear selecting and shifting actuator, the operation is switched to the step S2.
Preferably, each part of the hydraulic gear selecting and shifting actuator comprises a power part;
in step S12, a primary noise reduction process is performed on the power portion by wrapping with sound-deadening cotton.
Preferably, each part of the hydraulic gear selecting and shifting actuator comprises a connecting part;
then, in step S12, a primary noise reduction process is performed on the connection portion in a disconnection manner.
Preferably, step S3 includes:
step S31, acquiring a first noise evaluation which is input from the outside and is performed on the hydraulic gear selecting and shifting actuator after noise reduction;
step S32, carrying out noise test on the hydraulic gear selecting and shifting actuator after noise reduction to obtain a corresponding second noise reduction evaluation;
and step S33, carrying out linear weighting on the subjective noise reduction score and the objective noise reduction score to obtain the actual noise reduction score.
The noise reduction device is characterized in that the noise reduction device is formed after the noise reduction treatment is carried out on the connecting part of the hydraulic gear selecting and shifting actuator by adopting the noise reduction method;
the noise reduction device specifically includes:
the flange is connected with the hydraulic gear selecting and shifting actuator and comprises a flange hole;
a damper axially passing through the flange hole, comprising:
the first part extends out of the flange hole and is connected with the gearbox;
a second portion disposed in the flange aperture;
a third portion extending out of the flange hole;
the first, second and third portions are integrally formed;
a shock absorber through-hole extending through the first portion, the second portion, and the third portion;
a sleeve axially passing through the damper through-hole, the sleeve comprising:
a lateral portion disposed in the damper through-hole;
the longitudinal part extends out of the through hole of the shock absorption piece and is attached to the third part;
a sleeve through bore extending through the transverse portion and the longitudinal portion;
the centers of the flange hole, the damping piece through hole and the sleeve through hole are positioned on the same straight line;
and the screw penetrates through the sleeve through hole and is fixedly connected with the hydraulic gear selecting and shifting actuator and the gearbox.
Preferably, the shock absorbing member is made of a rubber material.
Preferably, the shock absorbing member is i-shaped.
Preferably, the sleeve is made of a metal material.
Preferably, the sleeve passes through the shock absorbing member through hole in an interference fit manner.
Preferably, the screw is sized to match the sleeve through bore.
The beneficial effects of the above technical scheme are: the working noise generated in the vehicle when the hydraulic gear selecting and shifting actuator works is reduced.
Drawings
FIG. 1 is a flow chart of the steps of a preferred embodiment of the present invention;
FIG. 2 is a flowchart of step S1 according to a preferred embodiment of the present invention;
FIG. 3 is a flowchart of step S3 according to a preferred embodiment of the present invention;
FIG. 4 is a graph of the noise spectrum in the vehicle before and after wrapping the motor according to a preferred embodiment of the present invention;
FIG. 5 is a graph of the near field internal noise spectrum before and after wrapping the motor according to a preferred embodiment of the present invention;
FIG. 6 is a graph of the noise spectrum of the vehicle interior region around the entire wrapped power section of a preferred embodiment of the present invention;
FIG. 7 is a graph of the noise spectrum of the near field region before and after wrapping the power section as a whole in a preferred embodiment of the present invention;
FIG. 8 is a graph of the in-vehicle noise spectrum before and after the noise reduction process of the connecting portion according to a preferred embodiment of the present invention;
FIG. 9 is a graph of the spectrum of the vehicle exterior noise before and after the noise reduction process of the connecting portion according to a preferred embodiment of the present invention;
FIG. 10 is a schematic view of a prior art configuration of the present invention;
FIG. 11 is a schematic structural diagram of a preferred embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.
A noise reduction method of a hydraulic gear selecting and shifting actuator is applied to the working noise of the hydraulic gear selecting and shifting actuator and is characterized by comprising the following steps:
step S1, when the hydraulic gear selecting and shifting actuator works, judging whether each part of the hydraulic gear selecting and shifting actuator is a noise-reducing interference factor or not, and outputting a judgment result;
step S2, according to the judgment result, each part of the hydraulic gear selecting and shifting actuator which is the noise-reducing interference factor is subjected to noise reduction processing to form a noise-reduced hydraulic gear selecting and shifting actuator;
step S3, carrying out noise evaluation on the hydraulic gear selecting and shifting actuator after noise reduction to obtain an actual noise reduction score;
step S4, the actual noise reduction score is compared with a preset noise reduction target value, and whether the hydraulic gear selecting and shifting actuator after noise reduction meets the noise reduction requirement is judged according to the comparison result:
if yes, quitting;
if not, the process returns to step S2.
Specifically, noise reduction is mainly classified into three methods, (1) noise reduction at a sound source; (2) attenuating noise in the noise propagation path; (3) the noise is weakened at the human ear, and the noise is the working noise generated by the hydraulic gear selecting and shifting actuator when the whole vehicle is powered on but the engine is not started, so the noise reduction processing is mainly carried out according to the former two modes. The hydraulic gear selecting and shifting actuator is connected with a gearbox to realize the gear shifting of a gear shifting vehicle, so as to analyze, the work noise of the hydraulic gear selecting and shifting actuator heard in the vehicle evaluation is mainly from a sounding power part and a propagating connecting part, in step S1, when the hydraulic gear selecting and shifting actuator works, all parts of the hydraulic gear selecting and shifting actuator are checked to judge whether the parts are noise-reducible interference factors, the situation of all parts of the hydraulic gear selecting and shifting actuator is changed by using a control variable method to obtain the noise-reducible interference factors of the hydraulic gear selecting and shifting actuator, in step S2, all parts of the hydraulic gear selecting and shifting actuator which are the noise-reducible interference factors are subjected to noise reduction treatment according to the judgment result to form the noise-reduced hydraulic gear selecting and shifting actuator, in step S3, the noise-reduced hydraulic gear selecting actuator is subjected to noise reduction evaluation, to obtain an actual noise reduction score, in step S4, the actual noise reduction score is compared with a preset noise reduction target value, and it is determined whether the noise-reduced hydraulic gear selecting and shifting actuator meets the noise reduction requirement according to the comparison result.
In a preferred embodiment of the present invention, in step S1, the method for determining whether a part of the hydraulic gear selecting and shifting actuator is a noise-reducing interference factor includes:
step S11, carrying out noise evaluation on one part of the hydraulic gear selecting and shifting actuator to obtain a noise evaluation result;
step S12, after the primary noise reduction processing is carried out on the evaluated part, the noise evaluation is carried out again to obtain the noise reduction evaluation result;
step S13, based on the noise evaluation result and the noise reduction evaluation result, judging whether the evaluated part is noise reduction interference factor, and outputting the judgment result
After steps S11-S13 are executed for all parts of the hydraulic gear selecting and shifting actuator, the operation goes to step S2.
In a preferred embodiment of the invention, each part of the hydraulic gear selecting and shifting actuator comprises a power part;
in step S12, the power portion is subjected to primary noise reduction by wrapping with sound-deadening cotton.
Specifically, the main sound generating device in the power portion of the hydraulic gear selecting and shifting actuator is a motor, and therefore, in step S11, a noise spectrometer is used for noise measurement in the vehicle, the obtained noise spectrum is used as a noise evaluation result, in step S12, a mode that silencing cotton wraps the motor is used for primary noise reduction processing of the motor, the noise spectrometer is used for measurement again in the vehicle to obtain a noise reduction evaluation result after the noise reduction processing, and in step S13, as can be seen from fig. 4, the noise spectrum does not change obviously after the noise reduction processing of the motor, so that the motor of the hydraulic gear selecting and shifting actuator is an inherent noise factor and is not a noise-reducing interference factor.
In addition, in order to prevent the noise influence of other factors in the transmission process, noise from other sources is used as noise generated by the motor, a judgment error can be generated, a noise spectrometer is adopted to measure the noise in a near field area 15cm away from the motor, the obtained noise spectrum is used as a noise evaluation result of a near field, the noise reduction treatment is carried out on the motor in a noise elimination cotton wrapping mode, the noise spectrometer is adopted to measure the noise in the near field area again to obtain a noise reduction evaluation result of the near field after the noise reduction treatment, and according to the comparison in fig. 5, the motor of the hydraulic gear selecting and shifting device is determined to be an inherent noise factor, and even if the noise reduction treatment is carried out on the motor, an obvious noise reduction effect can not be generated.
In addition, the power part of the hydraulic gear selecting and shifting actuator also comprises an oil pump, although the oil pump is not a main sound production device, the oil pump can also produce certain working noise, the part of the noise belongs to the noise produced by the power part of the hydraulic gear selecting and shifting actuator, in addition, in the power part, the connecting parts among elements such as a motor, the oil pump and the like can also produce noise, in order to simplify the measuring steps and improve the measuring efficiency, the noise evaluation of the steps S11-S13 is carried out on the whole power part of the hydraulic gear selecting and shifting actuator, the noise measurement is carried out in the vehicle by adopting a noise spectrometer, the obtained noise spectrum is taken as the noise evaluation result of the power part, the noise reduction evaluation result of the whole power part after the noise reduction treatment is obtained by adopting a mode of wrapping the power part with noise reduction cotton and then measuring the noise spectrometer in the vehicle again, as can be seen from fig. 6, the noise spectrum does not change significantly after the noise reduction processing is performed on the entire power portion. Similarly, in order to prevent the noise influence of other factors in the transmission process, noise from other sources is used as the noise generated by the whole power part of the hydraulic gear selecting and shifting device, a judgment error can be generated, a noise spectrometer is used for measuring the noise in a near field area 15cm away from the motor, the obtained noise spectrum is used as the evaluation result of the whole noise of the power part of a near field, the noise reduction treatment is carried out on the whole power part in a noise elimination cotton wrapping mode, the noise spectrometer is used for measuring in the near field area again, the evaluation result of the whole noise reduction of the power part of the near field after the noise reduction treatment is obtained, and the comparison in fig. 7 shows that the power part of the hydraulic gear selecting and shifting device is the inherent noise factor
In a preferred embodiment of the invention, each part of the hydraulic gear selecting and shifting actuator comprises a connecting part;
then, in step S12, the primary noise reduction processing is performed on the connection portion in a disconnected manner.
Specifically, the hydraulic gear selecting and shifting actuator is connected with the transmission case by adopting bolt clamping, therefore, aiming at the connecting part of the hydraulic gear selecting and shifting actuator, in step S11, noise measurement is carried out in the vehicle by adopting a noise spectrometer, the obtained noise spectrum is taken as a noise evaluation result, in step S12, the connecting part is disconnected, the hydraulic gear selecting and shifting actuator is not connected with the transmission case, at the moment, the propagation path equivalent to the working noise is disconnected, in the vehicle, the noise spectrometer is used for measuring again, the noise reduction evaluation result after the noise reduction processing is obtained, in step S13, the noise spectrum carries out the noise reduction processing on the connecting part according to the comparison in fig. 8, the noise is obviously changed, and therefore the connecting part of the hydraulic gear selecting and shifting actuator is a noise reduction interference factor.
At this time, the noise spectrometer may be used to measure the noise outside the vehicle, the noise may be measured at a position 50cm outside the driving door, the noise spectrum obtained at this time may be used as the noise evaluation result outside the vehicle, the noise reduction process may be performed on the connection portion, the hydraulic gear selection and shift actuator and the transmission may be disconnected, the noise spectrometer may be used again outside the vehicle to measure the noise, the noise reduction evaluation result outside the vehicle after the noise reduction process may be obtained, and it is known from fig. 9 that, after the noise reduction process is performed on the connection portion of the hydraulic gear selection and shift actuator, a good noise reduction result may be generated not only inside the vehicle but also outside the vehicle.
In a preferred embodiment of the present invention, step S3 includes:
step S31, acquiring a first noise evaluation which is input from the outside and is carried out on the hydraulic gear selecting and shifting actuator after noise reduction;
step S32, carrying out noise test on the hydraulic gear selecting and shifting actuator after noise reduction to obtain a corresponding second noise evaluation;
step S33, linear weighting is performed on the first noise evaluation and the second noise evaluation, and an actual noise reduction score is obtained.
Specifically, in step S31, a subjective evaluation method is adopted, and a worker evaluates and scores the hydraulic gear selecting and shifting actuator subjected to noise reduction to obtain a first noise evaluation; in step S32, an objective evaluation method is adopted, a decibel meter is used to measure and evaluate the noise environment in the vehicle, a second noise evaluation is obtained, and then a linear weighting method is used, because the first noise evaluation scores the evaluation, the higher the score is, the better the score is, and the second noise evaluation is the decibel of the noise measured by the decibel meter, the lower the score is, the better the score is, for example, the first noise evaluation weight coefficient may be selected to be-0.2, the second noise evaluation weight coefficient may be selected to be 0.8, and the actual noise reduction score is obtained, which is specifically realized by the following formula (1):
wherein, ω is1For actual noise reduction scoring, ω1For a first noise evaluation, -a1Evaluating a corresponding weight coefficient, ω, for the first noise2For the second noise evaluation, a2The corresponding weight coefficient is evaluated for the second noise.
Specifically, in step S4, the preset noise reduction target value includes two sets of values, the first set of values is the noise evaluation result of the original hydraulic gear shifting actuator, and the second set of values is the noise evaluation result of the special novel low-noise vehicle, which has a high cost and different overall performance. The actual noise reduction score of the hydraulic gear selecting and shifting actuator after noise reduction is compared with a preset noise reduction target value, if the actual noise reduction score is good with a first group of numerical values in the noise reduction target value, the noise reduction requirement can be indicated to be met, and the noise reduction effect is achieved. In addition, in the process of noise reduction treatment on the connecting part of the hydraulic gear selecting and shifting actuator, adjustment of noise reduction treatment can be achieved by changing the mounting torque of the screw on the connecting part, specifically, when the screw is mounted by taking 1.4Nm as a first mounting torque, the actual noise reduction score at the time is 15.87, is already smaller than the first group of numerical values 18.29, but has a difference value with the second group of numerical values of 0.64, when the screw is mounted by taking 23Nm as a second mounting torque, the screw is screwed, the actual noise reduction score at the time is 15.84, and has a difference value with the second group of numerical values of 0.61, so that the larger the mounting torque of the screw is, the actual noise reduction score of the hydraulic gear selecting and shifting actuator after noise reduction gradually approaches the second group of numerical values, and the. The noise reduction effect in the preferred embodiment of the present invention is as follows:
a noise reducing device applied to a propagation path of operating noise in the noise reducing method according to claim 1, comprising:
the hydraulic gear selecting and shifting actuator is connected with a flange 1, and the flange 1 comprises a flange hole 10;
the damper 2, the damper 2 axially passes through the flange hole 10, and includes:
a first part 21, wherein the first part 21 extends out of the flange hole 10 and is connected with the gearbox 01;
a second portion 22, the second portion 22 being disposed in the flange hole 10;
a third portion 23, the third portion 23 protruding from the flange hole 10;
the first, second and third portions 21, 22, 23 are integrally formed;
a damper through-hole 24, the damper through-hole 24 penetrating the first portion, the second portion, and the third portion;
the sleeve 3, the sleeve 3 axially passes through the damper through-hole 24, the sleeve 3 includes:
a lateral portion 31, the lateral portion 31 being disposed in the damper through-hole 24;
a longitudinal portion 32, the longitudinal portion 32 extending out of the damper through hole 2425 and being attached to the third portion 23;
a sleeve through hole 33, the sleeve through hole 33 penetrating the transverse portion 31 and the longitudinal portion 32;
the centers of the flange hole 10, the damping piece through hole 24 and the sleeve through hole 33 are on the same straight line;
and the screw 4 penetrates through the sleeve through hole 33, and fixedly connects the hydraulic gear selecting and shifting actuator with the gearbox 01.
Specifically, as shown in fig. 10, when the hydraulic gear selecting and shifting actuator is connected with the transmission case 01, the flange 02 is usually used for connecting with the transmission case 01, and a screw 03 is inserted into the flange 02 for fixing, however, this way will cause the hydraulic gear selecting and shifting actuator to transmit noise through this transmission path, which makes the working noise of the hydraulic gear selecting and shifting actuator larger, so a noise reduction device is provided here, as shown in fig. 11, the noise reduction device is used for connecting the hydraulic gear selecting and shifting actuator with the transmission case 01, which can reduce the working noise on the transmission path when the hydraulic gear selecting and shifting actuator is used. The flange 1 is connected with a hydraulic gear selecting and shifting actuator, the damping member 2 axially passes through the flange hole 10, the first part 21 of the damping member 2 extends out of the flange hole 10 and is connected with the gearbox 01, the second part 22 of the damping member 2 is arranged in the flange hole 10, the third part 23 of the damping member 2 extends out of the flange hole 10, the damping member through hole 24 passes through the first part 21, the second part 22 and the third part 23, in order to ensure the assembling rigidity and enable the noise reduction device to bear the torque of the screw 4, a sleeve 3 is used for axially passing through the damping member through hole 24, the transverse part 32 of the sleeve 3 is arranged in the damping member through hole 24, the longitudinal part 31 extends out of the damping member through hole 24 and is attached with the third part 23, the sleeve through hole 33 passes through the transverse part 32 and the longitudinal part 31, the centers of the flange hole 10, the damping member through hole 24 and the sleeve through hole 33 are on the same straight line, the screw 4 passes, carry out fixed connection with hydraulic pressure selection actuator of shifting and gearbox 01, the power part of the hydraulic pressure selection actuator of shifting this moment is kept apart by damper 2, can not transmit the noise vibration that the power part sent for gearbox 01 through screw 4 and flange 1, consequently can realize the effect of noise reduction.
In a preferred embodiment of the present invention, the damping member 2 is made of a rubber material.
Specifically, in order to ensure the damping effect of the damping member 2 and reduce the influence of the working noise when the hydraulic gear selecting and shifting actuator is used on the environment in the vehicle, the damping member 2 is made of a rubber material.
In a preferred embodiment of the present invention, the damping member 2 is an i-shaped through hole.
Specifically, in order to match the shape of the flange 1 and connect the gearbox 01, the damping piece 2 is arranged to be an i-shaped through hole, the damping piece 2 penetrates through the flange hole 10, noise of a power part of the hydraulic gear selecting and shifting actuator can be prevented from being transmitted to the gearbox 01, and similarly, vibration generated by the gearbox 01 can also be prevented from being transmitted to the power part.
In a preferred embodiment of the present invention, the sleeve 3 is made of a metal material.
Specifically, the sleeve 3 is used for increasing the assembling rigidity and bearing the torque of the screw 4, so that the sleeve 3 is made of metal materials,
in the preferred embodiment of the invention, the sleeve 3 is inserted through the damping member 2 by interference fit.
Specifically, damper 2 has certain elasticity for selecting the rubber materials preparation, and damper 2 is passed through interference fit's mode to sleeve 3, and in the installation, screw 4 inserts sleeve 3 and revolves the fastening regularly, can install more firmly.
In the preferred embodiment of the invention, the screw 4 is sized to match the sleeve through bore 33.
Specifically, the longitudinal portion 31 of the sleeve 3 is perpendicular to the transverse portion 32, the transverse portion 32 is a long narrow cylinder, the longitudinal portion 31 is a short wide cylinder, the radius of the transverse portion 32 is smaller than that of the longitudinal portion 31, the generatrix of the transverse portion 32 is larger than that of the longitudinal portion 31, the sleeve through hole 33 penetrates through the transverse portion 32 and the longitudinal portion 31, the transverse portion 32 of the sleeve 3 penetrates into the flange hole 10 and extends out of a part to be in contact with the gearbox 01, the longitudinal portion 31 of the sleeve 3 is attached to the third portion 23 of the damping member 2, the size of the screw 4 is matched with that of the sleeve through hole 33, the screw 4 is screwed into the sleeve through hole 33, and the hydraulic gear selecting and shifting actuator is connected with the gearbox 01 through the screw 4.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (11)
1. A noise reduction method of a hydraulic gear selecting and shifting actuator is applied to the working noise of the hydraulic gear selecting and shifting actuator and is characterized by comprising the following steps:
step S1, when the hydraulic gear selecting and shifting actuator works, judging whether each part of the hydraulic gear selecting and shifting actuator is a noise-reducing interference factor or not, and outputting a judgment result;
step S2, according to the judgment result, noise reduction processing is carried out on each part of the hydraulic gear selecting and shifting actuator which is taken as the noise reduction interference factor, so as to form the hydraulic gear selecting and shifting actuator after noise reduction;
step S3, carrying out noise evaluation on the hydraulic gear selecting and shifting actuator after noise reduction to obtain an actual noise reduction score;
step S4, the actual noise reduction score is compared with a preset noise reduction target value, and whether the hydraulic gear selecting and shifting actuator after noise reduction meets the noise reduction requirement is judged according to the comparison result:
if yes, quitting;
if not, the process returns to step S2.
2. The noise reduction method of claim 1, wherein the step S1 of determining whether a portion of the hydraulic gear selection actuator is a noise-reducing interference factor comprises:
step S11, carrying out noise evaluation on one part of the hydraulic gear selecting and shifting actuator to obtain a noise evaluation result;
step S12, after the primary noise reduction processing is carried out on the evaluated part, the noise evaluation is carried out again to obtain the noise reduction evaluation result;
step S13, according to the noise evaluation result and the noise reduction evaluation result, judging whether the evaluated part is the noise-reducing interference factor, and outputting the judgment result
And after the steps S11-S13 are executed for all the parts of the hydraulic gear selecting and shifting actuator, the operation is switched to the step S2.
3. The noise reduction method of claim 2, wherein the portions of the hydraulic shift actuator include a power portion;
in step S12, a primary noise reduction process is performed on the power portion by wrapping with sound-deadening cotton.
4. The noise reduction method of claim 2, wherein each portion of the hydraulic shift actuator includes a connecting portion;
then, in step S12, a primary noise reduction process is performed on the connection portion in a disconnection manner.
5. The noise reduction method according to claim 1, wherein the step S3 includes:
step S31, acquiring a first noise evaluation which is input from the outside and is performed on the hydraulic gear selecting and shifting actuator after noise reduction;
step S32, carrying out noise test on the hydraulic gear selecting and shifting actuator after noise reduction to obtain a corresponding second noise evaluation;
step S33, performing linear weighting on the first noise evaluation and the second noise evaluation, and acquiring the actual noise reduction score.
6. A noise reduction device, characterized in that the noise reduction device is formed by carrying out noise reduction treatment on the connecting part of the hydraulic gear selecting and shifting actuator by adopting the noise reduction method of any one of claims 1 to 6;
the noise reduction device specifically includes:
the flange is connected with the hydraulic gear selecting and shifting actuator and comprises a flange hole;
a damper axially passing through the flange hole, comprising:
the first part extends out of the flange hole and is connected with the gearbox;
a second portion disposed in the flange aperture;
a third portion extending out of the flange hole;
the first, second and third portions are integrally formed;
a shock absorber through-hole extending through the first portion, the second portion, and the third portion;
a sleeve axially passing through the damper through-hole, the sleeve comprising:
a lateral portion disposed in the damper through-hole;
the longitudinal part extends out of the through hole of the shock absorption piece and is attached to the third part;
a sleeve through bore extending through the transverse portion and the longitudinal portion; the centers of the flange hole, the damping piece through hole and the sleeve through hole are positioned on the same straight line;
and the screw penetrates through the sleeve through hole and is fixedly connected with the hydraulic gear selecting and shifting actuator and the gearbox.
7. The noise reducer of claim 6, wherein the damping member is made of a rubber material.
8. The noise reducer of claim 6, wherein the damping member is I-shaped.
9. The noise reducer of claim 6, wherein the sleeve is made of a metallic material.
10. The noise reducer of claim 6, wherein the sleeve passes through the damper throughbore by an interference fit.
11. The noise reducer of claim 6, wherein the screw is sized to match the sleeve through hole.
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| CN201911151465.6A CN110748636A (en) | 2019-11-21 | 2019-11-21 | Noise reduction method and device for hydraulic gear selecting and shifting actuator |
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| CN201911151465.6A CN110748636A (en) | 2019-11-21 | 2019-11-21 | Noise reduction method and device for hydraulic gear selecting and shifting actuator |
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