CN112763412A - Spring type energy storage mechanism of material friction abnormal sound test bed - Google Patents
Spring type energy storage mechanism of material friction abnormal sound test bed Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 23
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- 238000012360 testing method Methods 0.000 title claims abstract description 18
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- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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Abstract
The invention relates to the technical field of friction abnormal sound experimental equipment, in particular to a spring type energy storage mechanism of a material friction abnormal sound test bed. 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 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 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 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 spring and an energy storage block, one end of the spring is connected with the frame, the other end of the spring is connected with the energy storage block, and the energy storage block is positioned between the motion table and the objective table.
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 plurality of pull ropes, 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; one end of the pull rope is positioned in the concave cavity and connected with the bottom of the clamping block, and the other end of the pull rope penetrates through the bottom of the concave cavity and is positioned outside the sleeve. 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;
when the output shaft is about to extend to the limit state, the clamping block is separated from the output shaft manually by pulling the pull rope, the output shaft does not act on the sleeve any more, the output shaft extends in the sleeve in a decelerating manner until the output shaft extends to the limit state, and then the output shaft is reversely accelerated and contracted and gradually increased in speed until the output shaft contracts at a constant speed;
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 energy storage block and the motion platform move reversely under the action of the elastic force of the spring, then the pull rope is released, and the clamping block resets under the action of the elastic element; 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, the number of the pull ropes is two, and the two pull ropes are respectively positioned at two ends of the clamping block. The technical effect of the scheme is as follows: the fixture block can be moved stably.
Furthermore, the lower end of the pull rope is connected with a ball body. The technical effect of the scheme is as follows: prevent to pull the stay cord and make and skid, ensure that the stay cord moves smoothly.
Further, be equipped with the opening on the sleeve pipe, the transparent plate is installed to the opening part, can observe sheathed tube fixture block and output shaft through the transparent plate. The technical effect of the scheme is as follows: the pull rope is pulled in time at the position convenient for observing the clamping block, and the experimenter with the lack of experience can also operate.
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, a base is installed on the machine frame, the supporting table is arranged on the base in a sliding mode, and the base is in an I shape. The technical effect of the scheme is as follows: the dissipation of heat generated by friction between the supporting table and the base is facilitated.
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, a rubber pad is wrapped on the ball body. The technical effect of the scheme is as follows: the sliding of the ball body during manual pulling is avoided, and the ball body is ensured to be stably held.
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 spring 2, a sample piece 3, a base 4, a rubber pad 5, a support rod 6, a sleeve 7, an output shaft 8, a pull rope 9, an elastic piece 10, a clamping groove 11, a concave cavity 12, a clamping block 13, a ball 14, a pressing block 15, an energy storage block 16, a motion table 17 and an object stage 18.
The first embodiment is as follows:
the first embodiment is substantially as shown in figures 1 to 4 of the accompanying drawings: the spring type energy storage mechanism of the material friction abnormal sound test bed as shown in figure 1 comprises a frame, a support table 1, a motion table 17, an energy storage unit and an object stage 18, wherein the motion table 17 is arranged on the support table 1 in a sliding mode.
The number of the energy storage units is two, the two energy storage units are respectively located at the left end and the right end of the supporting table 1, each energy storage unit comprises a spring 2 and an energy storage block 16, the energy storage block 16 is located between a moving table 17 and an object stage 18, namely the energy storage block 16 is placed on the moving table 17, the object stage 18 is placed on the energy storage block 16, one end of the spring 2 is welded with the frame, and the other end of the spring 2 is connected with the energy storage block 16 through a screw.
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 18.
Example 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 support rod 6, a sleeve 7, an output shaft 8, an elastic part 10 and two pull ropes 9, the right end of the sleeve 7 is closed, the right end is connected with a moving table 17 through the support rod 6, namely the right end of the support rod 6 is welded with the moving table 17, 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. 4, two threaded holes are formed in the bottom of the fixture block 13, two holes are formed below the sleeve 7, namely the bottom of the concave cavity 12, the two holes are respectively located on the left side and the right side of the elastic element 10, the upper end of the pull rope 9 is located in the concave cavity, the upper end of the pull rope 9 is bent into an L shape, the pull rope 9 is penetrated through a screw, the screw is in threaded connection with the threaded hole in the bottom of the fixture block 13, the upper end of the rope is fixedly connected with the bottom of the fixture block 13, and the lower end of the rope is suspended after penetrating through the hole in the bottom of; of course, the lower end of the pull rope 9 can be connected with a ball 14 as shown in fig. 2, and the ball is bonded and wrapped with a rubber pad 5; of course, an opening can be formed in the sleeve, a transparent plate is adhered to the opening, and the fixture block and the output shaft in the sleeve can be observed through the transparent plate.
In contrast to the first exemplary embodiment, in the present exemplary embodiment, the energy storage block 16 is fixedly connected to the motion stage 17, for example by gluing, 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 17, the energy storage block 16 and the object stage 18 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 right spring 2 is compressed in the process that the motion table 17 and the energy storage block 16 move rightwards; when the output shaft 8 is about to extend to the limit state, as shown in fig. 3, the clamping block 13 is moved downwards to be separated from the output shaft 8 by manually pulling the pull rope 9, the output shaft 8 does not act on the sleeve 7 any more, the output shaft 8 is decelerated in the sleeve 7 and extends rightwards until the output shaft extends to the limit state, and then contracts leftwards in a reverse direction 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, under the action of the elastic force of the right-side spring 2, the energy storage block 16 and the moving platform 17 are driven by the spring to move leftwards and reversely to the positions shown in the figure 3, then the pull rope 9 is released, and the clamping block 13 moves upwards to reset under the action of the elastic piece 10; 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 17, the energy storage block 16 and the object stage 18 are driven by the fixture block 13 to move leftwards and reversely stably, 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 171 can be well reduced, and the smooth movement of the motion table 17 is beneficial to accurately measuring the friction force between the sample pieces 3.
When the output shaft 8 contracts leftwards, the spring 2 on the left side is compressed, and 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 moving table 17 can move rightwards under the action of the elastic force of the spring 2 on the left side; after the output shaft 8 moving rightwards contacts the clamping block 13 moving rightwards, the moving table 17 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 16 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. Material friction abnormal sound test bench spring energy storage mechanism, its 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 energy storage unit includes spring and energy storage piece, and the one end and the frame of spring are connected, and the other end and the energy storage piece of spring are connected, and the energy storage piece is located between motion platform and the objective table.
2. The material friction abnormal sound test bed spring type energy storage mechanism of claim 1, characterized in that: the slow-pushing device comprises a moving table, a sleeve, an output shaft, an elastic piece and a plurality of pull ropes, 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 piece and the plurality of pull ropes, 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; 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; one end of the pull rope is positioned in the concave cavity and connected with the bottom of the clamping block, and the other end of the pull rope penetrates through the bottom of the concave cavity and is positioned outside the sleeve.
3. The material friction abnormal sound test bed spring type energy storage mechanism of claim 2, characterized in that: the quantity of stay cord is two, and two stay cords are located the both ends of fixture block respectively.
4. The material friction abnormal sound test bed spring type energy storage mechanism of claim 3, characterized in that: the lower end of the pull rope is connected with a ball body.
5. The material friction abnormal sound test bed spring type energy storage mechanism of claim 4, characterized in that: be equipped with the opening on the sleeve pipe, the transparent plate is installed to the opening part, can observe intraductal fixture block and output shaft of cover through the transparent plate.
6. The material friction abnormal sound test bed spring type energy storage mechanism of claim 5, 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.
7. The material friction abnormal sound test bed spring type energy storage mechanism of claim 6, characterized in that: the frame is provided with a base, the support table is arranged on the base in a sliding manner, and the base is I-shaped.
8. The material friction abnormal sound test bed spring type energy storage mechanism of 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 material friction abnormal sound test bed spring type energy storage mechanism of 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 material friction abnormal sound test bed spring type energy storage mechanism of claim 9, characterized in that: the ball body is wrapped with a rubber pad.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110054280.4A CN112763412B (en) | 2021-01-15 | 2021-01-15 | Spring type energy storage mechanism of material friction abnormal sound test bed |
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| CN202110054280.4A CN112763412B (en) | 2021-01-15 | 2021-01-15 | Spring type energy storage mechanism of material friction abnormal sound test bed |
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| CN112763412B CN112763412B (en) | 2024-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN112683782A (en) * | 2021-01-15 | 2021-04-20 | 中国汽车工程研究院股份有限公司 | Torsional spring 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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