CN112683782A - Torsional spring type energy storage mechanism of material friction abnormal sound test bed - Google Patents
Torsional spring type energy storage mechanism of material friction abnormal sound test bed Download PDFInfo
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- CN112683782A CN112683782A CN202110055734.XA CN202110055734A CN112683782A CN 112683782 A CN112683782 A CN 112683782A CN 202110055734 A CN202110055734 A CN 202110055734A CN 112683782 A CN112683782 A CN 112683782A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 68
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 31
- 239000000463 material Substances 0.000 title claims abstract description 23
- 230000007246 mechanism Effects 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 title claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 239000000523 sample Substances 0.000 description 26
- 238000000034 method Methods 0.000 description 16
- 230000008569 process Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 230000009471 action Effects 0.000 description 5
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 5
- 238000003825 pressing Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241000883990 Flabellum Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005259 measurement 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 torsional spring type energy storage mechanism of a material friction abnormal sound test bed, which comprises a frame, a support table, a motion table, an energy storage unit and an objective table, wherein the motion table is arranged on the support table in a sliding mode, the energy storage unit comprises a torsional spring, an energy storage block, a rotating shaft, a gear and a rack, the rack is fixedly connected with the energy storage block, the gear is fixedly connected with the rotating shaft in a coaxial mode, the rotating shaft is arranged on the frame in a rotating mode, the torsional spring is arranged on the rotating shaft, and the energy storage. When the technical scheme is adopted, 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 torsion spring type energy storage mechanism of a material friction abnormal sound test bed.
Background
Abnormal sound is noise generated due to relative movement between two components exceeding a critical value, and as the quality requirement of a vehicle of a consumer is improved, the control of the abnormal sound of the vehicle becomes one of the key contents of the vehicle. The friction abnormal sound is a common abnormal sound problem which is difficult to solve on an automobile, the friction abnormal sound is generated because of the stick-slip phenomenon during material friction, and the risk of the friction abnormal sound of the material can be evaluated by evaluating the stick-slip phenomenon during material friction.
The existing testing method is that one sample piece is fixed on a supporting table, the other sample piece is fixed on a pressing block above the supporting table, the pressing block presses the two sample pieces, friction between the sample pieces is achieved through reciprocating motion of the supporting table, and therefore parameters such as friction coefficient and noise during friction are tested, and abnormal friction and noise performance of material pairs is evaluated. Because stick-slip phenomenon can not be effectively found in the characteristics such as friction coefficient obtained by testing, the evaluation of the material on the friction abnormal sound performance is influenced.
Disclosure of Invention
The invention aims to provide a torsion spring type energy storage mechanism capable of accurately measuring the stick-slip phenomenon of a sample material during friction.
In order to achieve the purpose, the technical scheme of the invention provides a torsional spring type energy storage mechanism of a material friction abnormal sound test bed, which comprises a frame, a support table, a motion table, an energy storage unit and an object table, wherein the motion table is arranged on the support table in a sliding mode, the energy storage unit comprises a torsional spring, an energy storage block, a rotating shaft, a gear and a rack, the rack is fixedly connected with the energy storage block, the gear is coaxially and fixedly connected with the rotating shaft, the rotating shaft is arranged on the frame in a rotating mode, the torsional spring is arranged on the rotating shaft, and the energy storage block is located.
The technical effect of the scheme is as follows: when the material generates stick-slip to friction, the energy storage mechanism can accumulate energy in the stick-slip process, and the energy storage mechanism can release energy in the slip process, so that the friction coefficient tested when the stick-slip phenomenon occurs has obvious stick-slip characteristics.
The device further comprises a slow pushing unit, the slow pushing unit comprises a supporting rod, a sleeve, an output shaft, an elastic part and a screw pair, one end of the sleeve is closed and is connected with the motion table through the supporting rod, the output shaft is arranged in the sleeve in a sliding mode, and a clamping groove is formed in the output shaft; a concave cavity is arranged on the inner side wall of the sleeve, a clamping block in an 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 screw rod pair comprises a screw rod and a supporting frame, the screw rod is rotatably arranged on the rack, the lower end of the supporting frame is in threaded connection with the screw rod, the upper end of the supporting frame is connected with a magnet, and the fixture block can be moved to the position above the magnet. The technical effect of the scheme is as follows: when the friction between the sample pieces is tested, the output shaft is in contact with the fixture block in the extension process and pushes the sleeve, the support rod, the motion table, the energy storage block and the objective table to move through the fixture block, so that the sample pieces on the objective table and the sample pieces on the pressure block are subjected to uniform friction, and the abnormal sound displacement can be accurately calculated;
the rack is driven to move by the energy storage block in the moving process of the moving table and the energy storage block, so that the gear is driven to rotate, the rotating shaft drives the torsion spring to deform along with the rotation of the gear, when the sleeve moves above the magnet and the output shaft is about to extend to the limit state at the same time, the screw rotates to drive the supporting frame to move upwards, so that the magnet is driven to move and approach the fixture block, the fixture 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 reduces the speed and extends in the sleeve until the output shaft extends to the limit state, and then the speed is reversely increased, accelerated;
in the process that the output shaft is decelerated and extended in the sleeve, the output shaft is separated from the clamping block, so that the output shaft does not act on the motion table any more, the pause generated in the reversing process of the output shaft is prevented from being transmitted to the motion table, the smooth movement of the motion table is beneficial to accurately measuring the friction force between sample pieces, the judgment of the friction performance of the sample pieces is facilitated to be improved, and the abnormal sound displacement can be calculated accurately;
in the process that the output shaft contracts reversely after being subjected to deceleration and extension in the sleeve, the torsion spring resets to drive the rotating shaft and the gear to rotate reversely so as to drive the rack, the energy storage block and the motion platform to move reversely, the screw rotates reversely to drive the support frame to move downwards so as to drive the magnet to move downwards, the magnet does not adsorb a clamping block any more, and the clamping block resets 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 both in a moving state, and after the output shaft is contacted with the clamping block, the sleeve, the support rod, the motion table, the energy storage block and the objective table can be driven by the clamping block to move reversely, so that the friction between the sample pieces is tested;
the invention provides the invention concept of 'reverse movement relay' by matching the energy storage unit and the buffer unit, and ensures that the friction state between the sample pieces does not change violently, thereby being beneficial to improving the judgment of the friction performance of the sample pieces.
Furthermore, a box body is fixed on the rack, the upper end of the screw rod is rotatably arranged in the box body, the upper end of the screw rod is connected with fan blades, the box body is connected with a hose, and the free end of the hose is aligned to the upper surface of the supporting table. The technical effect of the scheme is as follows: the screw rod drives the wind-force that the flabellum rotated the production and acts on the upper surface of brace table through the hose, is convenient for eliminate the heat that the friction produced between sample spare and the brace table, is favorable to accurate calculation abnormal sound displacement.
Furthermore, the lateral wall of the box body is provided with a limit groove, and the lateral wall of the supporting frame is arranged in the limit groove in a sliding manner. The technical effect of the scheme is as follows: the supporting frame is convenient to limit by the box body, and smooth movement of the supporting frame is ensured.
Furthermore, one end of the torsion spring is fixedly connected with the rotating shaft, and the other end of the torsion spring is abutted to the rack. The technical effect of the scheme is as follows: is favorable for improving the stability of the torsion spring.
Furthermore, the other end of the torsion spring is fixedly connected with the rack. The technical effect of the scheme is as follows: the stability of the torsion spring is improved.
Furthermore, the number of the energy storage units is two, and the two energy storage units are respectively positioned at two ends of the support platform. The technical effect of the scheme is as follows: set up an energy storage unit and can satisfy a supporting bench steady movement that reciprocates, set up two energy storage units and can satisfy a supporting bench steady movement that reciprocates several times, more be favorable to improving the judgement of sample piece frictional behavior.
Furthermore, the device also comprises a rack and an air spring, wherein the rack is positioned at two ends of the supporting table, and two ends of the air spring are respectively connected with the rack and the energy storage block. The technical effect of the scheme is as follows: the energy storage strength is convenient to improve.
Furthermore, the end face of the free end of the output shaft is provided with a graphite powder layer. The technical effect of the scheme is as follows: the friction force between the end surface of the free end of the output shaft and the clamping block is reduced.
Furthermore, the magnet is bonded with the upper end of the support frame. The technical effect of the scheme is as follows: the magnet is convenient to fix.
Drawings
FIG. 1 is a schematic diagram of an energy storage mechanism according to an embodiment of the invention;
FIG. 2 is a front cross-sectional view of a fixture block before being separated from an output shaft in accordance with an embodiment of the present invention;
FIG. 3 is a front cross-sectional view of a cartridge separated from an output shaft in accordance with an embodiment of the present invention;
fig. 4 is a partially enlarged view of a portion a in fig. 2.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the device comprises a support table 1, a rotating shaft 2, a sample piece 3, a gear 4, a rack 5, a support 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 screw 14, a pressing block 15, a support frame 16, a box body 17, fan blades 18, an energy storage block 19, a moving table 20 and an object stage 21.
The first embodiment is as follows:
the first embodiment is substantially as shown in figures 1 to 4 of the accompanying drawings: the torsional spring type energy storage mechanism of the material friction abnormal sound test bed shown in fig. 1 comprises a frame, a support table 1, a motion table 20, an energy storage unit and an object stage 21, wherein the motion table 20 is arranged on the support table 1 in a sliding mode. A pressing block 15 is vertically and fixedly installed on the rack through a bolt, one sample piece 3 is bonded on the pressing block 15, and the other sample piece 3 is bonded on the objective table 21.
The quantity of energy storage unit has two, two energy storage units are located the left side of brace table 1 respectively, the right side both ends, every energy storage unit includes the torsional spring, energy storage piece 19, axis of rotation 2, gear 4 and rack 5, energy storage piece 19 is located between motion platform 20 and objective table 21, energy storage piece 19 places on motion platform 20 promptly, objective table 21 places on energy storage piece 1916, rack 5 passes through screw fixed connection with energy storage piece 19, gear 4 and 2 coaxial weldings of axis of rotation, axis of rotation 2 rotates and sets up in the frame, the torsional spring sets up on axis of rotation 2, the one end and the 2 fixed connection of axis of rotation of torsional spring, the other end and the frame of torsional spring offset, of course the other end of torsional spring also can weld with the frame.
Example two:
on the basis of the first embodiment, as shown in fig. 2 and 4, the device further comprises a slow pushing unit, the slow pushing unit comprises a support rod 6, a sleeve 7, an output shaft 8, an elastic part 10 and a screw pair, the right end of the sleeve 7 is closed, the right end is connected with the moving table 20 through the support rod 6, namely the right end of the support rod 6 is welded with the moving table 20, and the left end of the support rod 6 is welded with the right end of the sleeve 7; an output shaft 8 of a power mechanism, such as an air cylinder, is arranged in the sleeve 7 in a sliding manner, and a clamping groove 11 is formed in the output shaft 8.
A concave cavity 12 is formed in the inner side wall of the sleeve 7, a clamping block 13 in the shape of is arranged in the concave cavity 12 in a sliding mode, 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 selected from a spring plate or a spring.
As shown in fig. 2 and 3, the screw assembly comprises a servo motor, a screw 14 and a support frame 16, the servo motor is fixedly mounted on the rack through bolts, and the type of the servo motor can be selected from MR-J2S-100A; the screw 14 is welded with an output shaft of the servo motor, the lower end of the support frame 16 is similar to a nut, the lower end of the support frame 16 is in threaded connection with the screw 14, and a magnet is bonded at the upper end of the support frame 16.
A box body 17 is fixed on the rack through bolts, the upper end of the screw 14 is rotatably arranged in the box body 17, the upper end of the screw 14 is welded with a fan blade 18, a through hole is formed in the rear side wall of the box body 17, a hose (not shown in the figure) is connected in the through hole, and the free end of the hose is aligned to the upper surface of the supporting table.
In contrast to the first embodiment, in the present embodiment, the energy storage block 19 is fixedly connected to the motion stage 20, for example, by bonding, welding or screwing.
The specific implementation process is as follows:
when the friction between the sample pieces 3 is tested, the output shaft 8 contacts with the fixture block 13 shown in fig. 2 and 4 in the process of extending rightwards, the sleeve 7, the support rod 6, the motion table 20, the energy storage block 19 and the object stage 21 are pushed to move through the fixture block 13, so that the sample pieces 3 on the support table 1 and the sample pieces 3 on the pressure block 15 are subjected to uniform friction, and the abnormal sound displacement can be conveniently and accurately calculated.
The energy storage block 19 drives the rack 5 to move rightwards in the process that the moving table 20 and the energy storage block 19 move rightwards, so that the gear 4 on the right side is driven to rotate anticlockwise, and the rotating shaft 2 drives the torsion spring to deform in the process of rotating along with the gear 4. As shown in fig. 3, when the sleeve 7 moves above the magnet 9 and the output shaft 8 is about to extend to the limit state, the servo motor is manually started, and the servo motor drives the screw 14 to rotate, so as to drive the supporting frame 16 to move upwards and further drive the magnet to move upwards and approach the fixture block; the fixture block 13 moves downwards under the adsorption action of the magnet 9 and is separated from the output shaft 8, the magnet 9 can be held by hand to adsorb the fixture block 13, the output shaft 8 does not act on the sleeve 7 any more, the output shaft 8 decelerates in the sleeve 7 and extends rightwards until extending to a limit state, and then contracts leftwards and reversely and gradually increases the speed to contract at a constant speed.
In the process that the output shaft 8 contracts leftwards after being decelerated and extended rightwards in the sleeve 7, the torsion spring resets to drive the rotating shaft 2 and the gear 4 on the right side to rotate clockwise, so that the rack 5, the energy storage block 19 and the motion platform 20 are driven to move leftwards to positions shown in the figure 3 in an auxiliary mode, the servo motor rotates reversely in the process, the screw 14 rotates reversely to drive the supporting frame 16 to move downwards, the magnet is driven to move downwards, the magnet does not adsorb a clamping block any more, and the clamping block 13 moves upwards under the action of the elastic piece 10 to reset; when the output shaft 8 contacts the fixture block 13 again, the output shaft 8 and the fixture block 13 are both in a moving state, after the output shaft 8 contacts the fixture block 13, the sleeve 7, the support rod 6, the motion table 20, the energy storage block 19 and the object stage 21 are driven by the fixture block 13 to stably and reversely move leftwards, and friction between the sample pieces 3 is tested.
Because the output shaft 8 and the fixture block 13 move in the same direction when contacting, even move at the same speed, compared with the contact between the moving output shaft 8 and the stationary fixture block 13, the contact impact force between the moving output shaft 8 and the moving fixture block 13 is smaller, the impact force transmitted to the motion table 20 can be well reduced, and the smooth movement of the motion table 20 is beneficial to accurately measuring the friction force between the sample pieces 3.
When the output shaft 8 contracts leftwards, the torsion spring on the right side is expanded, when the output shaft 8 contracts leftwards to a limit state and then extends rightwards, the right end of the output shaft 8 slides in the clamping groove 11, the output shaft 8 does not act on the clamping block 13 in the process, and the clamping block 13, the sleeve 7, the supporting rod 6 and the motion table 20 move rightwards under the action of the closing reset of the torsion spring on the right side; after the output shaft 8 moving rightwards contacts the clamping block 13 moving rightwards, the motion table 20 is driven to move rightwards stably, and the friction between the sample pieces 3 is tested.
The scheme ensures that the friction state between the sample pieces 3 does not change violently by proposing the invention concept of 'reverse movement relay', thereby being beneficial to improving the judgment of the friction performance of the sample pieces 3.
Example three:
on the basis of the second embodiment, the device further comprises four gas springs (not shown in the figure), two gas springs are respectively arranged at the left end and the right end of the support table 1, one end of each gas spring is hinged with the frame through a pin shaft, and the other end of each gas spring is hinged with the energy storage block 19 through a pin; of the two gas springs at the left end of the support table 1, the ends of the two gas springs close to the support table 1 are close to each other, and the two gas springs are splayed when viewed from the overlooking direction 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 layer of graphite powder.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.
Claims (10)
1. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed is characterized in that: including frame, brace table, motion platform, energy storage unit and objective table, the motion platform slides and sets up on the brace table, and the energy storage unit includes torsional spring, energy storage piece, axis of rotation, gear and rack, rack and energy storage piece fixed connection, gear and the coaxial fixed connection of axis of rotation, and the axis of rotation rotates and sets up in the frame, and the torsional spring sets up in the axis of rotation, and the energy storage piece is located between motion platform and the objective table.
2. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 1, characterized in that: the slow-pushing device comprises a moving table, a sleeve, an output shaft, an elastic part and a screw pair, and is characterized by further comprising a slow-pushing unit, wherein the slow-pushing unit comprises a supporting rod, a sleeve, the output shaft, the elastic part and the screw pair, 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 mode; a concave cavity is arranged on the inner side wall of the sleeve, a clamping block in an 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 screw rod pair comprises a screw rod and a supporting frame, the screw rod is rotatably arranged on the rack, the lower end of the supporting frame is in threaded connection with the screw rod, the upper end of the supporting frame is connected with a magnet, and the fixture block can be moved to the position above the magnet.
3. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 2, characterized in that: a box body is fixed on the rack, the upper end of a screw rod is rotatably arranged in the box body, the upper end of the screw rod is connected with a fan blade, a hose is connected to the box body, and the free end of the hose is aligned to the upper surface of the supporting table.
4. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 3, characterized in that: the lateral wall of the box body is provided with a limit groove, and the lateral wall of the supporting frame is arranged in the limit groove in a sliding manner.
5. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 4, characterized in that: one end of the torsional spring is fixedly connected with the rotating shaft, and the other end of the torsional spring is abutted to the rack.
6. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 5, characterized in that: the other end of the torsion spring is fixedly connected with the frame.
7. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 6, characterized in that: the number of the energy storage units is two, and the two energy storage units are respectively positioned at two ends of the supporting platform.
8. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 7, characterized in that: the energy storage device is characterized by further comprising a rack and an air spring, wherein the rack is located at two ends of the supporting table, and two ends of the air spring are respectively connected with the rack and the energy storage block.
9. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 8, characterized in that: the end face of the free end of the output shaft is provided with a graphite powder layer.
10. The torsional spring type energy storage mechanism of the material friction abnormal sound test bed according to claim 9, characterized in that: the magnet is bonded with the upper end of the support frame.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110055734.XA CN112683782B (en) | 2021-01-15 | 2021-01-15 | Torsional spring type energy storage mechanism of material friction abnormal sound test bed |
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| CN202110055734.XA CN112683782B (en) | 2021-01-15 | 2021-01-15 | Torsional spring type energy storage mechanism of material friction abnormal sound test bed |
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| CN112683782B CN112683782B (en) | 2024-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683781A (en) * | 2021-01-15 | 2021-04-20 | 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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| 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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| Publication number | Publication date |
|---|---|
| CN112683782B (en) | 2024-03-12 |
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