CN112683780B - Tension rubber type energy storage mechanism of material friction abnormal sound test bed - Google Patents
Tension rubber type energy storage mechanism of material friction abnormal sound test bed Download PDFInfo
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- CN112683780B CN112683780B CN202110054255.6A CN202110054255A CN112683780B CN 112683780 B CN112683780 B CN 112683780B CN 202110054255 A CN202110054255 A CN 202110054255A CN 112683780 B CN112683780 B CN 112683780B
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- 238000004146 energy storage Methods 0.000 title claims abstract description 54
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 29
- 239000000463 material Substances 0.000 title claims abstract description 21
- 230000007246 mechanism Effects 0.000 title abstract description 10
- 230000033001 locomotion Effects 0.000 claims description 22
- 238000007789 sealing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 21
- 230000008569 process Effects 0.000 description 21
- 230000000694 effects Effects 0.000 description 11
- 238000003825 pressing Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to the technical field of friction abnormal sound experimental equipment, in particular to a tension rubber type energy storage mechanism of a material friction abnormal sound experimental bench. By adopting the technical scheme, the stick-slip phenomenon of the material during friction can be accurately measured.
Description
Technical Field
The invention relates to the technical field of friction abnormal sound experimental equipment, in particular to a tension rubber type energy storage mechanism of a material friction abnormal sound test bed.
Background
The abnormal sound is noise generated by the fact that the relative motion between two parts exceeds a critical value, and along with the improvement of the requirements of consumers on the quality of automobiles, the abnormal sound control of the automobiles becomes one of key contents of the automobile. The friction abnormal sound is a common abnormal sound problem which is difficult to solve on an automobile, the reason for the friction abnormal sound is the stick-slip phenomenon of the material during friction, and the risk of the friction abnormal sound of the material can be evaluated by evaluating the stick-slip phenomenon of the material during friction.
The existing test method is that one sample is fixed on a supporting table, the other sample is fixed on a pressing block above the supporting table, the pressing block presses the two samples, meanwhile, friction among the samples is realized through reciprocating motion of the supporting table, parameters such as friction coefficient and noise during friction are tested, and friction abnormal sound performance of a material pair is evaluated. As the stick-slip phenomenon cannot be effectively found in the characteristics such as the friction coefficient obtained by the test, the evaluation of the friction abnormal sound performance of the material is affected.
Disclosure of Invention
The invention aims to provide a tension rubber type energy storage mechanism capable of accurately measuring friction force between sample pieces.
In order to achieve the above purpose, the technical scheme of the invention provides a tension rubber type energy storage mechanism of a material friction abnormal sound test bed, which comprises a frame, a supporting table, a moving table, an energy storage unit and an objective table, wherein the moving table is arranged on the supporting table in a sliding manner, the energy storage unit comprises a rubber strip, a traction piece and an energy storage block, the rubber strip is connected with the energy storage block through the traction piece, and the energy storage block is positioned between the moving table and the objective table.
The technical effect of this scheme is: when the material generates stick-slip to friction, the energy storage mechanism can gather energy in the viscous process, and can release energy in the sliding process, so that the friction coefficient tested when the stick-slip phenomenon occurs has obvious stick-slip characteristics, and the abnormal sound performance of the material in friction can be evaluated by evaluating the characteristics of the stick-slip phenomenon.
Further, the device also comprises a slow pushing unit, wherein the slow pushing unit comprises a supporting rod, a sleeve, an output shaft, an air cylinder and an elastic piece, the supporting rod is in a shape like a Chinese character 'ji', one end of the sleeve is closed, the end of the sleeve is connected with the moving table through the supporting rod, the output shaft is arranged in the sleeve in a sliding manner, and a clamping groove is formed in the output shaft; the inner side wall of the sleeve is provided with a concave cavity, a clamping block in a shape is arranged in the concave cavity in a sliding manner, and the clamping block is connected with the bottom of the concave cavity through an elastic piece; the cylinder is fixed to be set up in the frame, is fixed with the barrel in the frame, and the free end of the output shaft of cylinder passes the barrel and is connected with magnet, and the fixture block can remove to the magnet top, is connected with the slider on the output shaft of cylinder, and the slider slides to set up in the barrel, is connected with the bellows on the barrel, and the upper surface of brace table is aimed at to the free end of bellows. The technical effect of this scheme is: when friction between sample pieces is tested, the output shaft is contacted with the clamping block in the extending process and pushes the sleeve, the supporting rod, the moving table, the energy storage block and the objective table to move through the clamping block, so that the sample pieces on the objective table and the sample pieces on the pressing block are uniformly rubbed, and abnormal sound displacement is accurately calculated;
the rubber strip is driven to extend by the traction piece in the moving process of the moving table and the energy storage block; when the sleeve moves to the upper part of the magnet and the output shaft is about to extend to the limit state, the cylinder is started, the magnet is driven to move upwards in the extending process of the output shaft of the cylinder, when the magnet is close to the clamping block, the clamping block is separated from the output shaft under the adsorption action of the magnet, the output shaft does not act on the sleeve any more, the output shaft is in the sleeve to be in the reducing extension until the output shaft is in the limit state, and then the output shaft is in the reverse accelerating contraction and gradually speed-up to the uniform speed contraction;
the output shaft of the cylinder drives the sliding block to slide in the cylinder body in the extending process, and generated air flow is sprayed out through the corrugated pipe to act on the upper surface of the supporting table, so that heat generated by friction between the sample piece and the supporting table is conveniently eliminated, and abnormal sound displacement is accurately calculated.
In the process of decelerating and elongating the output shaft in the sleeve, the output shaft is separated from the clamping block, so that the output shaft does not act on the motion platform any more, the transmission of the setback generated in the reversing process of the output shaft to the motion platform is avoided, the smooth movement of the motion platform is beneficial to accurately measuring the friction force between sample pieces, and the judgment of the friction performance of the sample pieces is facilitated to be improved, namely, the abnormal sound displacement is accurately calculated;
in the process of reverse shrinkage of the output shaft after the deceleration and the extension in the sleeve, the motion platform and the energy storage block reversely move under the tensile force of the rubber strip, after the cylinder is closed, the magnet is driven to be far away from the clamping block in the process of shrinkage of the output shaft of the cylinder, the magnet does not adsorb the clamping block any more, and the clamping block is reset under the action of the elastic piece; when the output shaft is contacted with the clamping block again, the output shaft and the clamping block are in a moving state, and after the output shaft is contacted, the output shaft can drive the sleeve, the support rod, the moving table, the energy storage block and the objective table to move reversely through the clamping block, so that friction between sample pieces is tested;
according to the invention, the energy storage unit and the buffer unit are matched, so that the invention concept of reverse movement relay is provided, the friction state between the sample pieces is ensured not to be changed drastically, and the judgment of the friction performance of the sample pieces is facilitated to be improved.
Further, the upper end and the lower end of the cylinder body are connected with corrugated pipes. The technical effect of this scheme is: the sliding block can generate wind force in the process of sliding up and down in the cylinder body.
Further, the free end of the bellows is also aligned with the lower surface of the stage. The technical effect of this scheme is: the heat of the lower surface of the objective table is conveniently eliminated, and the heat is prevented from being transferred to the upper surface of the objective table.
Further, a sealing ring is sleeved on the sliding block. The technical effect of this scheme is: the wind power intensity generated when the sliding block moves is improved.
Further, the energy storage unit also comprises a pulley, one end of the traction piece is connected with the rubber strip, and the other end of the traction piece bypasses the pulley and is connected with the energy storage block. The technical effect of this scheme is: the traction piece is beneficial to pulling the energy storage block in the horizontal direction, and meanwhile, the traction piece is beneficial to pulling the rubber strip in the vertical direction.
Further, the pulley is I-shaped. The technical effect of this scheme is: the traction piece is limited through the pulley, so that the stability of the traction piece is further improved.
Further, the number of the energy storage units is two, and the two energy storage units are respectively positioned at two ends of the supporting table. The technical effect of this scheme is: the setting of one energy storage unit can satisfy the reciprocating stable movement of the supporting table for one time, and the setting of two energy storage units can satisfy the reciprocating stable movement of the supporting table for a plurality of times, thereby being more beneficial to the judgment of improving the friction performance of the sample.
Further, the cross section of the traction piece is square. The technical effect of this scheme is: the traction member is relatively stable during movement.
Further, the device also comprises a frame and a gas spring, wherein the frame is positioned at two ends of the supporting table, and the two ends of the gas spring are respectively connected with the frame and the energy storage block. The technical effect of this scheme is: is convenient for improving the energy storage strength.
Drawings
FIG. 1 is a schematic diagram of an energy storage mechanism according to an embodiment of the present invention;
FIG. 2 is a front cross-sectional view of an embodiment of the present invention before the cartridge is separated from the output shaft;
FIG. 3 is a front cross-sectional view of the embodiment of the invention with the cartridge separated from the output shaft;
fig. 4 is a partial enlarged view at a in fig. 2.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: the device comprises a supporting table 1, a rubber strip 2, a sample 3, a pulley 4, a traction piece 5, a supporting rod 6, a sleeve 7, an output shaft 8, a magnet 9, an elastic piece 10, a clamping groove 11, a concave cavity 12, a clamping block 13, a cylinder 14, a pressing block 15, a sliding block 16, a hole 17, an objective table 18, an energy storage block 19 and a motion table 20.
Embodiment one:
example one substantially as shown in figures 1 to 4: the tensile rubber type energy storage mechanism of the material friction abnormal sound test bed shown in fig. 1 comprises a frame, a supporting table 1, a moving table 20, an energy storage unit and an objective table 18. A pressing block 15 is vertically and fixedly arranged on the frame through bolts, one sample 3 is adhered to the pressing block 15, and the other sample 3 is adhered to the objective table 18.
The number of the energy storage units is two, the two energy storage units are respectively positioned at the left end and the right end of the supporting table 1, each energy storage unit comprises a rubber strip 2, a pulley 4, a traction piece 5 and an energy storage block 19, the rubber strip 2 is similar to a rubber band, and the lower end of the rubber strip 2 is fixedly connected with the frame in a knotting way; the pulley 4 is rotatably arranged on the frame, and the pulley 4 is I-shaped as seen from the top view direction of fig. 2 and 3; the cross-section of traction element 5 is square, and fixed connection is bound through the iron wire to the lower extreme of traction element 5 and the upper end of rubber strip 2, and motion platform 20 slides and sets up on supporting bench 1, and energy storage piece 19 is located between motion platform 20 and objective table 18, and energy storage piece 19 is placed on motion platform 20 promptly, and objective table 18 is placed on energy storage piece 19, and traction element 5's the other end passes through screw connection with energy storage piece 19 after bypassing pulley 4, and traction element 5 can select wire rope.
Embodiment two:
on the basis of the first embodiment, as shown in fig. 2 and 4, the device further comprises a slow pushing unit, wherein the slow pushing unit comprises a supporting rod 6, a sleeve 7, an output shaft 8, a lifting cylinder and an elastic piece 10, the top view of the supporting rod 6 is in a shape like a Chinese character 'ji', the right end of the sleeve 7 is closed, the right end of the supporting rod 6 is connected with a moving table 20 through the supporting rod 6, namely, the right end of the supporting rod 6 is welded with the moving table 20 of the moving table 20, and the left end of the supporting rod 6 is welded with the right end of the sleeve 7; the output shaft 8 of the power mechanism, such as a cylinder, is arranged in the sleeve 7 in a sliding way, and a clamping groove 11 is formed on the output shaft 8.
The inner side wall of the sleeve 7 is provided with a concave cavity 12, a clamping block 13 in a shape of is arranged in the concave cavity 12 in a sliding manner, the clamping block 13 is connected with the bottom of the concave cavity 12 through an elastic piece 10, namely the lower end of the elastic piece 10 is welded with the bottom of the concave cavity 12, and the upper end of the elastic piece 10 is welded with the clamping block 13; wherein the elastic member 10 may be a leaf spring or a spring.
As shown in fig. 2, the lifting cylinder is fixedly arranged on the frame through a bolt, the lifting cylinder can be an Adand SC cylinder, the frame is also fixedly provided with a cylinder body 14 through a bolt, and the free end of the output shaft of the cylinder penetrates through the cylinder body 14 and then is adhered with a magnet 9; a round sliding block 16 is welded on the output shaft of the air cylinder, the sliding block 16 is arranged in the cylinder 14 in a sliding way, and a sealing ring is sleeved on the sliding block 16; holes 17 are formed in the upper and lower ends of the cylinder 14, and bellows (not shown) are connected to the holes 17, and the free ends of the bellows are aligned with the upper and lower surfaces of the stage 18.
In contrast to the exemplary embodiment, in this exemplary embodiment the energy storage block 19 is fixedly connected to the motion stage 20, for example by means of adhesive bonding, welding or by means of screws.
The specific implementation process is as follows:
when friction between the sample pieces 3 is tested, the output shaft 8 contacts with the clamping block 13 shown in figures 2 and 4 in the rightward extension process and pushes the sleeve 7, the support rod 6, the moving table 20, the energy storage block 19 and the objective table 18 to move through the clamping block 13, so that the sample pieces 3 on the objective table 18 and the sample pieces 3 on the pressing block 15 are uniformly rubbed, and abnormal sound displacement is accurately calculated.
The left rubber strip 2 is driven to stretch by the traction piece 5 in the rightward moving process of the moving table 20 and the energy storage block 19. As shown in fig. 3, when the sleeve 7 moves above the magnet 9 and the output shaft 8 is about to extend to a limit state, the lifting cylinder is started manually, the magnet 9 is driven to move upwards in the extending process of the output shaft of the lifting cylinder, when the magnet 9 is close to the clamping block 13, the clamping block 13 moves downwards under the adsorption action of the magnet 9 and is separated from the output shaft 8, the clamping block 13 can be adsorbed by holding the magnet 9 manually, the output shaft 8 does not act on the sleeve 7 any more, the output shaft 8 is retarded to extend rightward in the sleeve 7 until the output shaft is extended to the limit state, and then is contracted reversely leftwards and gradually increases the speed until uniform speed is reached.
In the process that the output shaft 8 stretches rightward in the sleeve 7 in a decelerating way, the output shaft 8 is separated from the clamping block 13, so that the output shaft 8 does not act on the moving table 20 any more, the fact that the output shaft 8 is transmitted to the moving table 20 in a stopping way in the reversing process is guaranteed, the smooth movement of the moving table 20 is beneficial to accurately measuring the friction force between the sample pieces 3, the judgment of the friction performance of the sample pieces 3 is facilitated, and the abnormal sound displacement is accurately calculated.
In the process that the output shaft 8 is contracted leftwards after being decelerated and stretched rightwards in the sleeve 7, under the action of the pulling force of the left rubber strip 2, the rubber strip 2 and the traction piece 5 drive the moving table 20 and the energy storage block 19 to move leftwards and reversely to the position shown in the figure 3, in the process, the lifting cylinder is manually closed, in the process that the output shaft of the lifting cylinder is contracted, the magnet 9 is driven to move downwards and away from the clamping block 13 to not adsorb the clamping block 13 any more, and the clamping block 13 moves upwards and resets under the action of the elastic piece 10; when the output shaft 8 contacts the clamping block 13 again, the output shaft 8 and the clamping block 13 are in a moving state, and after the output shaft 8 contacts, the clamping block 13 drives the sleeve 7, the support rod 6, the moving table 20, the energy storage block 19 and the objective table 18 to move left and reverse smoothly, so that friction between the sample pieces 3 is tested.
Because the output shaft 8 and the clamping block 13 are in the same-direction movement and even move at the same speed when in contact, compared with the contact of the moving output shaft 8 and the static clamping block 13, the contact impact force of the moving output shaft 8 and the moving clamping block 13 is smaller, the impact force transmitted to the moving table 20 can be well reduced, and the smooth movement of the moving table 20 is beneficial to accurately measuring the friction force between the sample pieces 3.
When the output shaft 8 contracts leftwards, the right rubber strip 2 is lengthened, and when the output shaft 8 contracts leftwards to the limit state and then lengthens rightwards, the right end of the output shaft 8 slides in the clamping groove 11, in the process, the output shaft 8 does not act on the clamping block 13, and the clamping block 13, the sleeve 7, the support rod 6 and the moving table 20 move rightwards under the tensile force of the right rubber strip 2; after the output shaft 8 moving rightward is contacted with the clamping block 13 moving rightward, the moving table 20 is driven to move rightward smoothly, and friction between the sample pieces 3 is tested.
According to the scheme, through the invention conception of reverse movement relay, the friction state between the sample pieces 3 is ensured not to be changed drastically, so that the judgment of the friction performance of the sample pieces 3 is facilitated to be improved.
Embodiment III:
on the basis of the second embodiment, the device also comprises four gas springs (not shown in the figure), wherein two gas springs are respectively arranged at the left end and the right end of the supporting table 1, one end of each gas spring is hinged with the rack through a pin shaft, and the other end of each gas spring is hinged with the energy storage block 19 through a pin shaft; of the two gas springs at the left end of the support table 1, one end of the two gas springs close to the support table 1 is close to the other end, and the two gas springs are in an eight shape when seen from the overlooking directions of fig. 2 and 3. The end face of the right end of the output shaft 8 shown in fig. 4 is coated with a graphite powder layer.
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent.
Claims (7)
1. Material friction abnormal sound test bench, its characterized in that: the device comprises a frame, a supporting table, a moving table, an energy storage unit and an objective table, wherein the moving table is arranged on the supporting table in a sliding manner, the energy storage unit comprises a rubber strip, a traction piece and an energy storage block, the rubber strip is connected with the energy storage block through the traction piece, and the energy storage block is positioned between the moving table and the objective table;
the device comprises a sleeve, a motion platform, a support rod, an output shaft, an air cylinder and an elastic piece, wherein the support rod is in a shape like a Chinese character 'ji', one end of the sleeve is closed, the end is connected with the motion platform through the support rod, the output shaft is arranged in the sleeve in a sliding manner, and a clamping groove is formed in the output shaft; the inner side wall of the sleeve is provided with a concave cavity, a clamping block in a shape is arranged in the concave cavity in a sliding manner, and the clamping block is connected with the bottom of the concave cavity through an elastic piece; the cylinder is fixedly arranged on the frame, a cylinder body is fixed on the frame, the free end of an output shaft of the cylinder penetrates through the cylinder body and is connected with a magnet, the clamping block can move to the upper part of the magnet, the output shaft of the cylinder is connected with a sliding block, the sliding block is arranged in the cylinder body in a sliding manner, the cylinder body is connected with a corrugated pipe, and the free end of the corrugated pipe is aligned with the upper surface of the supporting table;
the energy storage unit further comprises a pulley, one end of the traction piece is connected with the rubber strip, and the other end of the traction piece bypasses the pulley and is connected with the energy storage block;
the number of the energy storage units is two, and the two energy storage units are respectively positioned at two ends of the supporting table.
2. The material friction abnormal sound test stand of claim 1, wherein: the upper end and the lower end of the cylinder body are connected with corrugated pipes.
3. The material friction abnormal sound test stand of claim 1, wherein: the free end of the bellows is also aligned with the lower surface of the stage.
4. The material friction abnormal sound test stand according to claim 3, wherein: the sliding block is sleeved with a sealing ring.
5. The material friction abnormal sound test stand of claim 1, wherein: the pulley is I-shaped.
6. The material friction abnormal sound test stand of claim 5, wherein: the cross section of the traction piece is square.
7. The material friction abnormal sound test stand of claim 6, wherein: the device also comprises a frame and a gas spring, wherein the frame is positioned at two ends of the supporting table, and the two ends of the gas spring are respectively connected with the frame and the energy storage block.
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| CN202110054255.6A CN112683780B (en) | 2021-01-15 | 2021-01-15 | Tension rubber type energy storage mechanism of material friction abnormal sound test bed |
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| CN202110054255.6A CN112683780B (en) | 2021-01-15 | 2021-01-15 | Tension rubber type energy storage mechanism of material friction abnormal sound test bed |
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| CN112683781B (en) * | 2021-01-15 | 2024-03-12 | 中国汽车工程研究院股份有限公司 | Air bag type energy storage mechanism of material friction abnormal sound test bed |
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