Noise test device

Abstract

The utility model relates to the technical field of noise test, and discloses a noise test device, comprising a sliding mechanism comprising a box body, a driving unit arranged in the box body, two slide rails horizontally arranged on the box body at intervals, and a pedestal slidably arranged on the slide rails, the driving unit is configured to drive the pedestal to reciprocate along the slide rails, and the driving unit is configured to drive the pedestal to move along the slide rails; the base is used for mounting a first sample; the pressure applying mechanism comprises a clamping block correspondingly arranged on the base, a first supporting rod vertically installed on the clamping block, a balancing weight detachably installed on the first supporting rod, a first connecting rod and a second supporting rod, the bottom of the clamping block is used for clamping a second sample, the second sample abuts against the first sample, and the second supporting rod is installed on the box body; and the detection mechanism comprises a pull and push dynamometer and an acceleration sensor. The noise test device can compare the noise of different materials in the friction process, and the test cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of noise testing, in particular to a noise testing device. Background Art

[0002] Electric vehicles are driven by electric motors, devoid of engine or exhaust noise, making them relatively quiet during driving. This makes problems such as squeezing and friction noise between components more easily exposed. Currently, noise testing of automotive component materials primarily uses microphones to collect noise decibels during friction for noise analysis. However, this requires extremely low background noise levels, otherwise significant deviations can occur. This requires the construction of costly semi-anechoic or fully anechoic chambers, making the testing expensive. Utility Model Content

[0003] The purpose of the utility model is to provide a noise testing device, which can compare the noise levels of different materials during the friction process and reduce the test cost.

[0004] In order to achieve the above object, the utility model provides a noise test device, comprising:

[0005] The sliding mechanism includes a box, a driving unit provided on the box, two horizontally arranged slide rails installed on the box at intervals, and a base slidably mounted on the slide rails, wherein the driving unit is configured to drive the base to reciprocate along the slide rails, and the base is used to mount a first sample;

[0006] a pressure mechanism comprising a clamping block correspondingly provided on the base, a first support rod vertically mounted on the clamping block, a counterweight detachably mounted on the first support rod, a first connecting rod, and a second support rod, wherein the bottom of the clamping block is used to clamp the second sample, and the second sample abuts against the first sample, the second support rod is mounted on the box, and the second support rod is connected to the first support rod via the first connecting rod; and

[0007] The detection mechanism includes a push-pull force gauge and an acceleration sensor. The push-pull force gauge is arranged on one side of the first support rod and is used to measure the push and pull forces applied to the first support rod. The acceleration sensor is installed on the clamping block and is used to measure the acceleration of the clamping block during the reciprocating movement of the base along the slide rail.

[0008] In some embodiments, the driving unit includes a motor, a horizontally arranged driving rod and a roller, the power output end of the motor is connected to one end of the driving rod, the roller is installed on the driving rod, and there is a socket in the middle of the base, the roller is arranged in the socket, and the extension direction of the socket is perpendicular to the extension direction of the slide rail.

[0009] In some embodiments, a mounting hole is provided in the middle of the driving rod, and the roller is detachably mounted in the mounting hole, and the mounting hole extends along the length direction of the driving rod.

[0010] In some embodiments, the detection mechanism further includes a tooling and a second connecting rod. The tooling is installed on the box body and is used to position and install the push-pull force gauge. The push-pull force gauge is connected to the first support rod through the second connecting rod.

[0011] In some embodiments, the detection mechanism further includes a data line and a computer, and the computer is connected to the acceleration sensor via the data line.

[0012] In some embodiments, the detection mechanism further includes a collector, and the acceleration sensor, the collector and the computer are connected in sequence via the data line.

[0013] In some embodiments, the first sample and the second sample are respectively made of one material selected from the group consisting of plastic, metal, leather, and glass.

[0014] In some embodiments, the counterweight is a weight.

[0015] In some embodiments, the pressure mechanism further includes a pad, the clamping block is connected to the first support rod via the pad, and the upper surface of the pad is perpendicular to the first support rod.

[0016] In some embodiments, the pressure mechanism also includes two mounting blocks, the mounting blocks include a first through hole and a second through hole, the two ends of the first connecting rod are correspondingly installed in the first through holes of the two mounting blocks, and the first support rod and the second support rod are correspondingly installed in the second through holes of the two mounting blocks.

[0017] The utility model provides a noise test device, which has the following advantages compared with the prior art:

[0018] The counterweight block can apply pressure to the second sample at the bottom of the clamping block, so that the first sample and the second sample abut against each other. The driving unit can drive the base to move back and forth along the slide rail, so that the first sample and the second sample rub against each other. The noise level of different materials during the friction process is tested by data detected by the push-pull dynamometer and the acceleration sensor. Since the noise data is tested by mechanical data, the test cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the noise testing device provided in an embodiment of the utility model.

[0020] Figure 2 This is a schematic diagram of the installation structure of the base of the noise test device provided by an embodiment of the utility model on the box.

[0021] Figure 3 This is a schematic diagram of the enlarged structure of the driving unit of the noise test device provided in an embodiment of the present utility model.

[0022] Figure 4 This is an enlarged structural schematic diagram of the mounting block of the noise test device provided in an embodiment of the present utility model.

[0023] In the figure: 1. sliding mechanism; 11. box; 12. driving unit; 121. motor; 122. driving rod; 122a. mounting hole; 123. roller; 13. slide rail; 14. base; 141. socket; 15. first sample; 2. pressure mechanism; 21. clamping block; 22. first support rod; 23. counterweight; 24. first connecting rod; 25. second support rod; 26. second sample; 27. cushion block; 28. mounting block; 281. first through hole; 282. second through hole; 3. detection mechanism; 31. push-pull force gauge; 32. speed sensor; 33. tooling; 34. second connecting rod; 35. data cable; 36. computer; 37. collector. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0025] It should be understood that in the description of this application, the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must be provided with a specific orientation, constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. That is, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, unless otherwise specified, "multiple" means two or more.

[0026] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0027] like Figure 1-4As shown, the noise testing device according to the embodiment of the present invention includes a sliding mechanism 1 , a pressure applying mechanism 2 and a detection mechanism 3 .

[0028] The sliding mechanism 1 includes a box body 11, a driving unit 12 provided on the box body 11, two horizontally arranged slide rails 13 installed at intervals on the box body 11, and a base 14 slidably installed on the slide rails 13. The driving unit 12 is configured to drive the base 14 to move back and forth along the slide rails 13, and the base 14 is used to install a first sample 15.

[0029] The pressure mechanism 2 includes a clamping block 21 corresponding to the base 14, a first support rod 22 vertically installed on the clamping block 21, a counterweight block 23 detachably installed on the first support rod 22, a first connecting rod 24 and a second support rod 25. The bottom of the clamping block 21 is used to clamp the second sample 26, and the second sample 26 is in contact with the first sample 15. The second support rod 25 is installed on the box body 11. The second support rod 25 is connected to the first support rod 22 through the first connecting rod 24. The function of the second support rod 25 is to keep the first support rod 22 vertical on the clamping block 21 through the first connecting rod 24.

[0030] The detection mechanism 3 includes a push-pull dynamometer 31 and an acceleration sensor 32. The push-pull dynamometer 31 is arranged on one side of the first support rod 22, and is used to measure the thrust and pull applied to the first support rod 22. The thrust and pull are the deformation force of the first support rod 22 caused by the squeezing and friction between the second sample 26 and the first sample 15. The acceleration sensor 32 is installed on the clamping block 21, and is used to measure the acceleration of the clamping block 21 during the reciprocating movement of the base 14 along the slide rail 13. Similarly, the acceleration is caused by the deformation of the first support rod 22 caused by the squeezing and friction between the second sample 26 and the first sample 15.

[0031] During use, the extrusion force between the second sample 26 and the first sample 15 is adjusted by adjusting the weight of the counterweight 23, and the friction speed and frequency between the second sample 26 and the first sample 15 are adjusted by adjusting the rotation speed of the drive unit 12, so that the stick-slip motion between the second sample 26 and the first sample 15 generates noise. The noise is analyzed by recording the data of the push-pull dynamometer 31 and the acceleration sensor 32. Under the same conditions, the greater the force, the greater the decibel number of the noise.

[0032] Based on the above structural setting, the noise levels of different materials during the friction process can be compared and the test cost can be reduced.

[0033] like Figure 2 and 3As shown, in one embodiment, the drive unit 12 includes a motor 121 installed in the housing 11, a horizontally arranged drive rod 122, and a roller 123. The power output end of the motor 121 extends out of the housing 11 and is connected to one end of the drive rod 122. The roller 123 is mounted on the drive rod 122. The base 14 is located above the drive rod 122, and a socket 141 is provided in the middle of the base 14. The roller 123 is disposed in the socket 141. The extension direction of the socket 141 is perpendicular to the extension direction of the slide rail 13. During use, the motor 121 drives the drive rod 122 to rotate around the power output end of the motor 121, causing the roller 123 on the drive rod 122 to rotate around the power output end of the motor. The roller 123 also reciprocates along the socket 141 of the base 14, driving the base 14 to reciprocate on the slide rail 13.

[0034] Furthermore, the drive rod 122 has a mounting hole 122a in the middle, into which a roller 123 is removably mounted. The mounting hole 122a extends along the length of the drive rod 122. The travel of the base 14 on the slide rail 13 can be adjusted by adjusting the position of the roller 123 in the mounting hole 122a. Specifically, the farther the roller 123 is from the power output terminal of the motor 121, the longer the travel of the base 14 on the slide rail 13; conversely, the closer the roller 123 is to the power output terminal of the motor 121, the shorter the travel of the base 14 on the slide rail 13.

[0035] like Figure 1 As shown, the detection mechanism 3 also includes a fixture 33 and a second connecting rod 34. The fixture 33 is installed on the box body 11 and is used to position and install the push-pull force gauge 31. The push-pull force gauge 31 is connected to the first support rod 22 via the second connecting rod 34. The fixture 33 stabilizes the position of the push-pull force gauge 31 and maintains accurate measurement results. The function of the second connecting rod 34 is to transmit the push or pull force applied to the first support rod 22 to the push-pull force gauge 31.

[0036] like Figure 1 As shown, the detection mechanism 3 further includes a data line 35 and a computer 36. The computer 36 is connected to the acceleration sensor 32 via the data line 35. The computer 36 can analyze and process the data generated by the acceleration sensor 32.

[0037] Furthermore, the detection mechanism 3 further includes a collector 37. The acceleration sensor 32, the collector 37 and the computer 36 are sequentially connected via a data line 35. The collector 37 can convert the analog signal generated by the acceleration sensor into a digital signal for analysis and processing by the computer 36.

[0038] For example, the first sample 15 and the second sample 26 are respectively made of one of plastic, metal, leather and glass, so as to compare the noise levels of different materials during the friction process.

[0039] For example, the counterweight 23 is a weight. By adjusting the weight of the weight, the squeezing force of the second sample 26 on the first sample 15 can be accurately adjusted.

[0040] In one embodiment, the pressure mechanism 2 further includes a pad 27, through which the clamping block 21 is connected to the first support rod 22, and the upper surface of the pad 27 is perpendicular to the first support rod 22. The pad 27 keeps the clamping block 21 in a horizontal state, and the pad 27 and the clamping block 21 are connected by bolts.

[0041] In one embodiment, the pressure mechanism 2 further includes two mounting blocks 28, each including a first through-hole 281 and a second through-hole 282. The ends of the first connecting rod 24 are correspondingly mounted in the first through-holes 281 of the two mounting blocks 28, and the first support rod 22 and the second support rod 25 are correspondingly mounted in the second through-holes 282 of the two mounting blocks 28. The mounting blocks 28 facilitate assembly between the first support rod 22, the first connecting rod 24, and the second support rod 25. To maintain structural flexibility, the ends of the first connecting rod 24 are respectively mounted in the first through-holes 281 of the two mounting blocks 28 via bearings; the first support rod 22 and the second support rod 25 are respectively mounted in the second through-holes 282 of the two mounting blocks 28 via bearings.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present invention. These improvements and replacements should also be regarded as the scope of protection of the present invention.

Claims

1. A noise test device, characterized in that: include: The sliding mechanism includes a box, a driving unit provided on the box, two horizontally arranged slide rails installed on the box at intervals, and a base slidably mounted on the slide rails, wherein the driving unit is configured to drive the base to reciprocate along the slide rails, and the base is used to mount a first sample; The pressure mechanism includes a clamping block corresponding to the base, a first support rod vertically mounted on the clamping block, a counterweight detachably mounted on the first support rod, a first connecting rod, and a second support rod, wherein the bottom of the clamping block is used to clamp the second sample, and the second sample abuts against the first sample, the second support rod is mounted on the box, and the second support rod is connected to the first support rod through the first connecting rod; as well as The detection mechanism includes a push-pull force gauge and an acceleration sensor. The push-pull force gauge is arranged on one side of the first support rod and is used to measure the push and pull forces applied to the first support rod. The acceleration sensor is installed on the clamping block and is used to measure the acceleration of the clamping block during the reciprocating movement of the base along the slide rail.

2. The noise testing device according to claim 1, characterized in that: The driving unit includes a motor, a horizontally arranged driving rod and a roller. The power output end of the motor is connected to one end of the driving rod. The roller is installed on the driving rod. There is a socket in the middle of the base. The roller is arranged in the socket. The extension direction of the socket is perpendicular to the extension direction of the slide rail.

3. The noise testing device according to claim 2, characterized in that: The middle portion of the driving rod is provided with a mounting hole, the roller is detachably mounted in the mounting hole, and the mounting hole extends along the length direction of the driving rod.

4. The noise testing device according to claim 1, characterized in that: The detection mechanism further includes a tool and a second connecting rod. The tool is installed on the box body and is used to position and install the push-pull force gauge. The push-pull force gauge is connected to the first support rod through the second connecting rod.

5. The noise testing device according to claim 1, characterized in that: The detection mechanism further includes a data line and a computer, and the computer is connected to the acceleration sensor via the data line.

6. The noise testing device according to claim 5, characterized in that: The detection mechanism further includes a collector, and the acceleration sensor, the collector and the computer are connected in sequence via the data line.

7. The noise testing device according to claim 1, characterized in that: The first sample and the second sample are respectively made of one material selected from the group consisting of plastic, metal, leather and glass.

8. The noise testing device according to claim 1, characterized in that: The counterweight block adopts a weight.

9. The noise testing device according to claim 1, characterized in that: The pressure mechanism further includes a pad, the clamping block is connected to the first support rod via the pad, and the upper surface of the pad is perpendicular to the first support rod.

10. The noise testing device according to claim 1, characterized in that: The pressure mechanism also includes two mounting blocks, each of which includes a first through hole and a second through hole. The two ends of the first connecting rod are correspondingly installed in the first through holes of the two mounting blocks, and the first support rod and the second support rod are correspondingly installed in the second through holes of the two mounting blocks.

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