NVH detection device

Abstract

The utility model discloses an NVH (Noise Vibration and Harshness) detection device, which comprises a testing mechanism and a push rod mechanism, the testing mechanism and the push rod mechanism are both positioned in a sound insulation cavity, the testing mechanism comprises a positioning jig and a pressing jig, the positioning jig is suitable for selectively extending out of a pick-and-place opening to be used for picking and placing a piece to be tested, and the pressing jig is used for pressing the piece to be tested. The pressing jig is used for pressing the to-be-tested piece borne by the positioning jig, the push rod mechanism comprises a push rod, and the push rod can move relative to the to-be-tested piece and is used for abutting against the to-be-tested piece; the first vibration detection part and the noise detection part are located in the sound insulation cavity and used for detecting vibration and noise of the to-be-detected part respectively, and the second vibration detection part is installed on the push rod and used for detecting vibration of the push rod. According to the NVH detection equipment provided by the embodiment of the utility model, the vibration data of the push rod can be eliminated, and the accuracy of the vibration data measured by the to-be-detected piece can be improved, so that the reliability of the NVH detection equipment is improved, the use effect is better, and the application range is wider.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle manufacturing, in particular to NVH detection equipment. Background Art

[0002] With the development of the national economy and the continuous improvement of living standards, vehicles are becoming more and more important in daily life and travel, and the NVH performance of vehicles is also an aspect that needs to be considered during vehicle production and manufacturing. Improving the NVH performance of vehicles can reduce the noise and vibration generated by vehicles when driving, thereby improving the user experience. Vehicle parts such as BSC brake devices need to be tested for NVH performance by NVH testing equipment during production and manufacturing, and can only be installed and used after passing the test. However, the transmission device of the existing NVH testing equipment is connected to the transmission of the product to be tested. The vibration generated during the operation of the transmission device will affect the vibration data measured by the product to be tested, resulting in errors in the test results, etc. There is room for improvement. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an NVH detection device, which can improve the accuracy of vibration data measured on a test piece and improve reliability.

[0004] The NVH detection equipment according to the embodiment of the utility model includes: a soundproof box, a soundproof cavity is formed in the soundproof box, the soundproof cavity is provided with a take-in and put-out port, and the take-in and put-out port is provided with a take-in and put-out door that can be opened and closed; a testing mechanism and a push rod mechanism, the testing mechanism and the push rod mechanism are both located in the soundproof cavity, the testing mechanism includes a positioning jig and a pressing jig, the positioning jig is suitable for selectively extending from the take-in and put-out port for taking and putting the workpiece to be tested, the pressing jig is used to press the workpiece to be tested carried by the positioning jig, the push rod mechanism includes a push rod, the push rod is movable relative to the workpiece to be tested and is used to press the workpiece to be tested; a first vibration detection member, a second vibration detection member and a noise detection member, the first vibration detection member and the noise detection member are located in the soundproof cavity and are respectively used to detect the vibration and noise of the workpiece to be tested, and the second vibration detection member is installed on the push rod and is used to detect the vibration of the push rod.

[0005] The NVH detection equipment according to the embodiment of the utility model is provided with a second vibration detection component, which can detect the vibration of the push rod, and then after the first vibration detection component detects the workpiece to be tested, the vibration data of the push rod can be excluded, which can improve the accuracy of the vibration data measured on the workpiece to be tested, so as to improve the reliability of the NVH detection equipment, achieve better use effect and a wider range of application.

[0006] The NVH detection device according to some embodiments of the present utility model further includes a test rack, the test rack is installed in the sound insulation cavity, and both the test mechanism and the push rod mechanism are installed on the test rack;

[0007] Wherein, the positioning fixture is slidably installed on the test rack to slide into or out of relative to the pick-and-place opening, and the pressing fixture is liftably installed above the test rack to approach or move away from relative to the pressing fixture.

[0008] The NVH detection device according to some embodiments of the present utility model, the push rod mechanism is located on a side of the test mechanism away from the pick-and-place opening, and the push rod is adapted to move along the sliding direction of the positioning fixture to approach or move away from the workpiece to be tested carried on the positioning fixture.

[0009] The NVH detection device according to some embodiments of the present utility model, both the first vibration detection piece and the noise detection piece are installed on the test rack, and the positioning fixture is adapted to slide above the first vibration detection piece and the noise detection piece.

[0010] The NVH detection device according to some embodiments of the present utility model, the test mechanism includes a telescopic driving piece and a pressing driving piece installed on the test rack;

[0011] Wherein, the telescopic driving piece is connected to the positioning fixture and is used to drive the positioning fixture to slide relative to the test rack, and the pressing driving piece is connected to the pressing fixture and is used to drive the pressing fixture to lift relative to the test rack.

[0012] The NVH detection device according to some embodiments of the present utility model, the test rack includes a mechanism mounting plate and a rack main body, the mechanism mounting plate is installed above the rack main body, both the test mechanism and the push rod mechanism are installed on the mechanism mounting plate, the rack main body is provided with a plurality of first legs, and the bottom of the first legs is provided with first vibration isolation foot seats.

[0013] The NVH detection device according to some embodiments of the present utility model, the sound insulation box body includes a frame outer wall plate, a sound insulation component and a sound absorption hole plate, the sound insulation cavity is defined inside the frame outer wall plate, the sound absorption hole plate is installed on the inner side of the frame outer wall plate, and the sound insulation component is arranged between the frame outer wall plate and the sound absorption hole plate.

[0014] The NVH detection device according to some embodiments of the present utility model, the sound insulation component includes an inner sound absorption cotton layer, a partition plate and an outer sound absorption cotton layer, and the inner sound absorption cotton layer, the partition plate and the outer sound absorption cotton layer are sequentially distributed in the inner and outer directions between the sound absorption hole plate and the frame outer wall plate.

[0015] The NVH detection device according to some embodiments of the present invention, the sound insulation box body is further provided with an equipment maintenance port, and the equipment maintenance port is provided with a maintenance door that can be opened and closed.

[0016] The NVH detection device according to some embodiments of the present invention further includes a control cabinet, the control cabinet is installed on the sound insulation box body and is located outside the sound insulation cavity, and the first vibration detection member, the second vibration detection member and the noise detection member are electrically connected to the control cabinet.

[0017] The additional aspects and advantages of the present invention will be partly given in the following description, partly will become obvious from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0018] The above and / or additional aspects and advantages of the present invention will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

[0019] Figure 1 is a partial structural schematic diagram of the NVH detection device according to an embodiment of the present invention Figure 1 ;

[0020] Figure 2 is a partial structural schematic diagram of the NVH detection device according to an embodiment of the present invention Figure 2 ;

[0021] Figure 3 is a structural schematic diagram of the NVH detection device according to an embodiment of the present invention.

[0022] Reference Numerals:

[0023] NVH detection device 100, workpiece to be measured 101,

[0024] Sound insulation box body 1, outer frame wall plate 11, sound insulation component 12, inner sound absorption cotton layer 121, partition plate 122, outer sound absorption cotton layer 123, sound absorption hole plate 13, sound insulation cavity 14, access opening 15, seal 151, access door 16, equipment maintenance port 17, maintenance door 18, second leg 19, second vibration isolation foot seat 191, control cabinet 2,

[0025] Testing mechanism 3, positioning fixture 31, pressing fixture 32, telescopic driving member 33, pressing driving member 34,

[0026] Push rod mechanism 4, push rod 41, pushing driving member 42,

[0027] Testing frame 5, mechanism mounting plate 51, guide rail 52, frame main body 53, first leg 54, first vibration isolation foot seat 541. Detailed Embodiments

[0028] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0029] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] Reference will be made below to Figures 1 - 3 Describe the NVH detection device 100 according to an embodiment of the present utility model, which can improve the accuracy of the vibration data measured for the test piece 101 and improve the reliability.

[0032] As Figures 1 - 3 shown, the NVH detection device 100 according to an embodiment of the present utility model includes: a sound insulation box 1, a test mechanism 3, a push rod mechanism 4, a first vibration detection member, a second vibration detection member, and a noise detection member.

[0033] A sound insulation cavity 14 is formed inside the sound insulation box body 1. The sound insulation cavity 14 is provided with a pick-up and placement opening 15. A pick-up and placement door 16 that can be opened and closed is provided at the pick-up and placement opening 15. The testing mechanism 3 and the push rod mechanism 4 are both located inside the sound insulation cavity 14. The testing mechanism 3 includes a positioning fixture 31 and a pressing fixture 32. The positioning fixture 31 is adapted to selectively extend from the pick-up and placement opening 15 for picking up and placing the test piece 101 to be tested. The pressing fixture 32 is used to press the test piece 101 carried on the positioning fixture 31. The push rod mechanism 4 includes a push rod 41. The push rod 41 is movable relative to the test piece 101 and is used to press against the test piece 101. The first vibration detection piece and the noise detection piece are located inside the sound insulation cavity 14 and are respectively used to detect the vibration and noise of the test piece 101. The second vibration detection piece is installed on the push rod 41 and is used to detect the vibration of the push rod 41.

[0034] Among them, the NVH detection device 100 can detect the NVH performance of the BSC braking device of the vehicle, etc., and can thus avoid problems in aspects such as NVH performance after the BSC braking device is installed on the whole vehicle, reduce the vehicle failure rate, accelerate the production rate, and reduce the production cost.

[0035] Specifically, the NVH detection device 100 is provided with a sound insulation box body 1. The sound insulation box body 1 can be set as a rectangular box body or a cylindrical box body, etc., and can be selected according to the actual situation. And the sound insulation box body 1 is arranged on the outermost side of the NVH detection device 100, which can support and protect the NVH detection device 100 and can provide installation points for other components of the NVH detection device 100. A sound insulation cavity 14 is formed in the sound insulation box body 1. The sound insulation box body 1 can be made of sound insulation materials, so that the influence of external noise and vibration, etc. can be blocked inside the sound insulation cavity 14. The sound insulation cavity 14 is provided with a pick-up and placement opening 15, and the pick-up and placement opening 15 can be formed on the front side of the sound insulation box body 1.

[0036] And a pick-up and placement door 16 is provided at the pick-up and placement opening 15. The pick-up and placement door 16 is set to be movable relative to the pick-up and placement opening 15, that is, the pick-up and placement door 16 can move relative to the pick-up and placement opening 15 in the up and down direction or the left and right direction, etc., so that the pick-up and placement door 16 can open or close the pick-up and placement opening 15. A seal 151 is also provided at the pick-up and placement opening 15. The seal 151 can be made of rubber and other materials, and the seal 151 is arranged around the pick-up and placement opening 15. Thus, when the pick-up and placement door 16 closes the pick-up and placement opening 15, the seal 151 can seal the gap between the pick-up and placement door 16 and the pick-up and placement opening 15. When the pick-up and placement door 16 opens the pick-up and placement opening 15, the user can place the test piece 101 to be tested into the sound insulation cavity 14 through the pick-up and placement opening 15. When the pick-up and placement door 16 closes the pick-up and placement opening 15, a closed sound insulation cavity 14 can be formed inside the sound insulation box body 1.

[0037] Further, the NVH detection device 100 is also provided with a testing mechanism 3 and a push rod mechanism 4. The testing mechanism 3 can fix the test piece 101, and the push rod mechanism 4 can push the test piece 101. Both the testing mechanism 3 and the push rod mechanism 4 are arranged in the sound insulation cavity 14, so that the test piece 101 can avoid external influence during detection, improving the accuracy of the detection data. The testing mechanism 3 is provided with a positioning fixture 31 and a pressing fixture 32. Both the positioning fixture 31 and the pressing fixture 32 are arranged to be movable relative to the sound insulation box body 1, and the positioning fixture 31 can move to and extend out of the access opening 15 from the access opening 15, so that the user can place the test piece 101 on the positioning fixture 31 outside the sound insulation box body 1, which is convenient for operation. After the positioning fixture 31 enters the sound insulation cavity 14, the pressing fixture 32 can press the test piece 101 placed on the positioning fixture 31.

[0038] At the same time, the push rod mechanism 4 is provided with a push rod 41. The push rod 41 is arranged to be movable relative to the sound insulation box body 1, and the push rod 41 can move towards the test piece 101, so that after the push rod 41 moves to contact the test piece 101, it can press against the test piece 101. The NVH detection device 100 is also provided with a first vibration detection piece, a second vibration detection piece and a noise detection piece. The first vibration detection piece, the second vibration detection piece and the noise detection piece are all arranged in the sound insulation cavity 14. The first vibration detection piece is used to detect the vibration of the test piece 101, the noise detection piece is used to detect the noise of the test piece 101, and the second vibration detection piece is installed at the push rod 41 and can be used to detect the vibration of the push rod 41.

[0039] Further, when detecting the test piece 101, the access door 16 can open the access opening 15, and the positioning fixture 31 extends out of the access opening 15. The user can place the test piece 101 on the positioning fixture 31. The positioning fixture 31 can move back into the access opening 15 together with the test piece 101. At this time, the access door 16 closes the access opening 15, so that the sound insulation cavity 14 forms a closed environment, and the pressing fixture 32 moves to press the test piece 101. The push rod 41 can move to press against the test piece 101. When the test piece 101 is running, the push rod 41 pushes the test piece 101 to move. At this time, the first vibration detection piece, the second vibration detection piece and the noise detection piece all operate. The first vibration detection piece and the noise detection piece respectively detect the vibration and noise of the test piece 101, and the second vibration detection piece detects the vibration of the push rod 41. And the user can analyze the data detected by the first vibration detection piece and the second vibration detection piece through software algorithms and other means, so as to exclude the vibration data of the push rod 41 and improve the accuracy of the vibration data measured for the test piece 101.

[0040] The NVH detection device 100 according to the embodiments of the present utility model is provided with a second vibration detection member, which can detect the vibration of the push rod 41. Furthermore, after the first vibration detection member detects the test piece 101, the vibration data of the push rod 41 can be excluded, which can improve the accuracy of the vibration data measured for the test piece 101, thereby improving the reliability of the NVH detection device 100, with better use effects and a wider application range.

[0041] In some embodiments, the NVH detection device 100 further includes a test frame 5. The test frame 5 is installed in the sound insulation chamber 14, and both the test mechanism 3 and the push rod mechanism 4 are installed on the test frame 5. Among them, the positioning fixture 31 is slidably installed on the test frame 5 to slide into or out of the pick-and-place opening 15, and the pressing fixture 32 is liftably installed above the test frame 5 to approach or move away from the pressing fixture 32.

[0042] Specifically, as Figure 1 shown, the NVH detection device 100 is also provided with a test frame 5. The test frame 5 is also arranged in the sound insulation chamber 14. Both the test mechanism 3 and the push rod mechanism 4 are installed on the test frame 5. A guide rail 52 is arranged above the test frame 5. The positioning fixture 31 of the test mechanism 3 is installed on the guide rail 52, so that the positioning fixture 31 can be in guiding cooperation with the guide rail 52. The guide rail 52 extends towards the pick-and-place opening 15. Furthermore, the positioning fixture 31 can slide along the guide rail 52 towards or away from the pick-and-place opening 15. When the user needs to place the test piece 101 on the positioning fixture 31, the positioning fixture 31 can slide out of the pick-and-place opening 15 along the guide rail 52. And when the user places the test object on the positioning fixture 31, the positioning fixture 31 can slide into the pick-and-place opening 15 along the guide rail 52 together with the test object, so that the test piece 101 can be detected in the sound insulation chamber 14.

[0043] Furthermore, the pressing fixture 32 can be arranged to be liftably installed above the test frame 5. After the positioning fixture 31 sends the test piece 101 into the sound insulation chamber 14, it can move the test piece 101 along the guide rail 52 to below the pressing fixture 32, and the pressing fixture 32 can move downward to press against the test piece 101. Furthermore, the installation reliability of the test piece 101 can be ensured, the reliability of the detection result can be improved, and after the detection is completed, the pressing fixture 32 can move upward to separate from the test piece 101.

[0044] Among them, the pick-and-place door 16 can also be arranged to be liftably installed at the pick-and-place opening 15. The pick-and-place door 16 can be set as an automatic lift door, that is, a sensor can be set at the pick-and-place opening 15. When an object approaches the pick-and-place opening 15, the pick-and-place door 16 automatically rises, and when the object moves away from the pick-and-place opening 15, the pick-and-place door 16 automatically descends, improving the use convenience. The pick-and-place door 16 can also be set as a manual lift door, improving the reliability of the pick-and-place door 16 and increasing the setting flexibility to meet different use requirements.

[0045] In some embodiments, the push rod mechanism 4 is located on the side of the testing mechanism 3 away from the pick-and-place opening 15, and the push rod 41 is adapted to move along the sliding direction of the positioning fixture 31 to approach or move away from the workpiece 101 to be tested carried by the positioning fixture 31.

[0046] Specifically, both the push rod mechanism 4 and the testing mechanism 3 are disposed within the sound insulation chamber 14 and are both mounted above the testing machine frame 5, and as Figure 1 shown, the push rod mechanism 4 is disposed on the side of the testing mechanism 3 away from the pick-and-place opening 15, that is, the testing mechanism 3 is disposed close to the pick-and-place opening 15, the push rod mechanism 4 is disposed away from the pick-and-place opening 15, the testing mechanism 3 is provided with a positioning fixture 31, and the positioning fixture 31 can slide out of or into the pick-and-place opening 15 along the guide rail 52 of the testing machine frame 5. Disposing the testing mechanism 3 close to the pick-and-place opening 15 can reduce the moving distance of the positioning fixture 31, reduce the energy consumption during the operation of the NVH detection device 100, and can shorten the set length of the guide rail 52, reduce the production cost, and at the same time can improve the setting compactness of the internal components of the NVH detection device 100, reduce the volume of the NVH detection device 100, and improve the lightweight.

[0047] Further, the push rod mechanism 4 is provided with a push rod 41. After the positioning fixture 31 moves the workpiece 101 to be tested under the pressing fixture 32 and the pressing fixture 32 presses the workpiece 101, the push rod 41 can move to abut against the workpiece 101, and the push rod 41 can move along the sliding direction of the positioning fixture 31 to approach or move away from the workpiece 101 to be tested carried by the positioning fixture 31, which can shorten the set distance, reduce the operation energy consumption, and disposing the push rod mechanism 4 on the side of the testing mechanism 3 away from the pick-and-place opening 15 can prevent the push rod mechanism 4 from affecting the operation path of the testing mechanism 3 and ensure the operation reliability of the push rod mechanism 4 and the testing mechanism 3.

[0048] In some embodiments, both the first vibration detection member and the noise detection member are mounted on the testing machine frame 5, and the positioning fixture 31 is adapted to slide above the first vibration detection member and the noise detection member.

[0049] Specifically, as Figures 1 - 2 shown, the testing mechanism 3 is mounted above the testing machine frame 5, a guide rail 52 is provided above the testing machine frame 5, the positioning fixture 31 of the testing mechanism 3 can slide out of or into the pick-and-place opening 15 along the guide rail 52, and both the first vibration detection member and the noise detection member can be mounted on the testing machine frame 5. The second vibration detection member can be directly mounted on the push rod 41 of the pushing mechanism. The first vibration detection member can detect the vibration of the workpiece 101 to be tested, and the noise detection member can detect the noise of the workpiece 101 to be tested.

[0050] Further, when the component 101 to be tested is placed on the positioning fixture 31, the positioning fixture 31 can move the component 101 to above the first vibration detection component and the noise detection component, and the pressing fixture 32 is also arranged above the first vibration detection component and the noise detection component, so that after the pressing fixture 32 presses the component 101, the component 101 operates, and the first vibration detection component and the noise detection component can respectively detect vibration and noise. Furthermore, the setting distance between the first vibration detection component and the noise detection component and the component 101 is relatively close, improving the accuracy of the detection data. And in actual setting, the first vibration detection component and the noise detection component can also be arranged on the positioning fixture 31, improving the setting flexibility.

[0051] In some embodiments, the testing mechanism 3 includes a telescopic driving component 33 and a pressing driving component 34 installed on the testing frame 5. Among them, the telescopic driving component 33 is connected to the positioning fixture 31 and is used to drive the positioning fixture 31 to slide relative to the testing frame 5, and the pressing driving component 34 is connected to the pressing fixture 32 and is used to drive the pressing fixture 32 to lift relative to the testing frame 5.

[0052] Specifically, the testing mechanism 3 is arranged above the testing frame 5 and is provided with a positioning fixture 31 and a pressing fixture 32. Both the positioning fixture 31 and the pressing fixture 32 are movable relative to the sound insulation box 1, and as Figure 2 shown, the testing mechanism 3 is also provided with a telescopic driving component 33 and a pressing driving component 34. The telescopic driving component 33 is installed on the testing frame 5. The telescopic driving component 33 can be set as a telescopic cylinder, and the telescopic driving component 33 is arranged parallel to the guide rail 52, that is, the telescopic driving component 33 can extend towards the access opening 15 or shorten towards the inside of the access opening 15. The telescopic driving component 33 can be connected to the positioning fixture 31. Furthermore, when the telescopic driving component 33 extends towards the access opening 15, it can drive the positioning fixture 31 to slide out of the access opening 15 along the guide rail 52, and when the telescopic driving component 33 shortens towards the inside of the access opening 15, it can drive the positioning fixture 31 to slide into the access opening 15 along the guide rail 52.

[0053] Further, the pressing driving member 34 is installed on the test rack 5. The pressing driving member 34 can be set as a pressing air cylinder, and the pressing driving member 34 is vertically arranged. The pressing driving member 34 can be connected to the pressing fixture 32, so that the pressing driving member 34 can drive the pressing fixture 32 to lift relative to the test rack 5. That is, when the positioning fixture 31 moves the workpiece 101 to be tested below the pressing fixture 32, the pressing driving member 34 can drive the pressing fixture 32 to move downward, thereby pressing the workpiece 101 to be tested. And after the detection is completed, the pressing driving member 34 can drive the pressing fixture 32 to rise, so that the positioning fixture 31 can move the workpiece 101 to be tested outside the pick-and-place port 15. The telescopic driving member 33 and the pressing driving member 34 have simple structures, can reduce the setting cost, and can ensure the operation reliability. And the push rod mechanism 4 includes a pushing driving member 42, and the pushing driving member 42 can be set as a pushing air cylinder. The pushing driving member 42 is connected to the push rod 41 and is used to drive the push rod 41 to move toward or away from the workpiece 101 to be tested.

[0054] In some embodiments, the test rack 5 includes a mechanism mounting plate 51 and a rack main body 53. The mechanism mounting plate 51 is installed above the rack main body 53. The test mechanism 3 and the push rod mechanism 4 are both installed on the mechanism mounting plate 51. The rack main body 53 is provided with a plurality of first legs 54, and a first vibration isolation foot seat 541 is provided at the bottom of each first leg 54.

[0055] Specifically, the test rack 5 is arranged in the sound insulation cavity 14, and as Figure 1 shown, the test rack 5 is provided with a mechanism mounting plate 51 and a rack main body 53. The mechanism mounting plate 51 can be set as a rectangular plate or a circular plate, etc. The mechanism mounting plate 51 can be installed above the rack main body 53 by means of connectors or welding, etc. The connectors can be set as bolts, etc. The setting cost is low and the installation is simple. The test mechanism 3 and the push rod mechanism 4 can both be installed on the mechanism mounting plate 51 by means of connectors or welding, etc., and then can be fixed above the rack main body 53 through the mechanism mounting plate 51. By connecting the mechanism mounting plate 51 and the rack main body 53 with connectors, the mechanism mounting plate 51 and the rack main body 53 can be detached. And by connecting the test mechanism 3, the push rod mechanism 4 and the mechanism mounting plate 51 with connectors, the test mechanism 3 and the push rod mechanism 4 are both detachable from the mechanism mounting plate 51, which is convenient for later maintenance, etc.

[0056] Further, the rack main body 53 is further provided with first legs 54. The first legs 54 are arranged below the rack main body 53. The first legs 54 can be set as multiple, and the multiple first legs 54 are spaced apart and distributed below the rack main body 53. A first vibration isolation foot seat 541 is correspondingly arranged below each first leg 54. Further, when the rack main body 53 is placed in the sound insulation cavity 14, vibration isolation can be carried out between the rack main body 53 and the inner wall of the sound insulation cavity 14 through the first vibration isolation foot seat 541, reducing the vibration conduction to the workpiece 101 to be tested and improving the accuracy of the detection data.

[0057] In some embodiments, the sound insulation box body 1 includes an outer frame wall plate 11, a sound insulation component 12, and a sound absorption perforated plate 13. A sound insulation cavity 14 is defined inside the outer frame wall plate 11. The sound absorption perforated plate 13 is installed on the inner side of the outer frame wall plate 11, and the sound insulation component 12 is arranged between the outer frame wall plate 11 and the sound absorption perforated plate 13.

[0058] Specifically, the NVH detection device 100 is provided with a sound insulation box body 1. A sound insulation cavity 14 is formed inside the sound insulation box body 1. The influence of external noise, vibration, etc. can be blocked inside the sound insulation cavity 14, improving the accuracy of the detection result. The sound insulation box body 1 is provided with an outer frame wall plate 11, a sound insulation component 12, and a sound absorption perforated plate 13. The outer frame wall plate 11 is arranged on the outermost side of the sound insulation box body 1. Thus, the outer frame wall plate 11 can define the sound insulation cavity 14. The sound insulation component 12 is arranged on the inner side of the outer frame wall plate 11, and the sound absorption perforated plate 13 is arranged on the inner side of the sound insulation component 12. That is, the outer frame wall plate 11, the sound insulation component 12, and the sound absorption perforated plate 13 are arranged in sequence along the outer-to-inner direction. The sound insulation component 12 can be set as multiple layers of sound insulation materials, and the sound absorption perforated plate 13 is set as a plate-like structure with a hole-like structure. Thus, the sound insulation box body 1 can perform multiple treatments on external noise, ensuring the reliability of noise reduction of the sound insulation box body 1.

[0059] Furthermore, the sound insulation box body 1 is further provided with second legs 19. The second legs 19 are arranged below the sound insulation box body 1. The second legs 19 can be set as multiple, and the multiple second legs 19 are spaced apart and distributed below the sound insulation box body 1. A second vibration isolation foot seat 191 is correspondingly arranged below each second leg 19. Thus, when the sound insulation box body 1 is placed indoors, vibration isolation can be performed between the sound insulation box body 1 and the floor, etc. through the second vibration isolation foot seat 191, reducing the vibration conduction into the sound insulation box body 1 and improving the accuracy of the detection data.

[0060] In some embodiments, the sound insulation component 12 includes an inner sound absorption cotton layer 121, a partition plate 122, and an outer sound absorption cotton layer 123. The inner sound absorption cotton layer 121, the partition plate 122, and the outer sound absorption cotton layer 123 are distributed in sequence along the inner-to-outer direction between the sound absorption perforated plate 13 and the outer frame wall plate 11.

[0061] Specifically, the sound insulation component 12 is arranged between the outer frame wall plate 11 and the sound absorption perforated plate 13, enabling the sound insulation box body 1 to block noise multiple times and improving the sound insulation effect. And as Figure 1As shown in the figure, the sound insulation component 12 is provided with an inner sound absorption cotton layer 121, a partition plate 122 and an outer sound absorption cotton layer 123. The inner sound absorption cotton layer 121, the partition plate 122 and the outer sound absorption cotton layer 123 are distributed in sequence along the inner and outer directions. That is, the inner sound absorption cotton layer 121 is arranged between the partition plate 122 and the sound absorption hole plate 13, and the outer sound absorption cotton layer 123 is arranged between the partition plate 122 and the outer wall plate 11 of the box body. Thus, when noise is transmitted from the sound insulation box body 1 into the sound insulation cavity 14, it can sequentially pass through the outer wall plate 11 of the box body, the outer sound absorption cotton layer 123, the partition plate 122, the inner sound absorption cotton layer 121 and the sound absorption hole plate 13, so as to perform multiple noise reduction treatments on the noise and improve the reliability of noise reduction.

[0062] Moreover, in actual setting, the sound insulation component 12 can be provided with multiple layers according to the use requirements to improve the noise reduction effect. Also, the number of layers can be reduced to reduce the setting cost and improve the setting flexibility.

[0063] In some embodiments, the sound insulation box body 1 is further provided with an equipment maintenance port 17, and the equipment maintenance port 17 is provided with a maintenance door 18 that can be opened and closed.

[0064] Specifically, as Figure 1 shown, the sound insulation box body 1 is further provided with an equipment maintenance port 17. The equipment maintenance port 17 can be arranged at the rear side or both sides of the sound insulation box body 1. That is, the equipment maintenance port 17 is staggeredly distributed from the access port 15. In this embodiment, the equipment maintenance port 17 and the access port 15 are oppositely distributed on the front and rear sides of the sound insulation box body 1. And the equipment maintenance port 17 is provided with a maintenance door 18. The maintenance door 18 is set as a normally closed door, and the maintenance door 18 can open or close the equipment maintenance port 17. When the NVH detection device 100 needs to be maintained, the user can open the maintenance door 18 to open the equipment maintenance port 17. Then, the internal push rod mechanism 4, the test mechanism 3, etc. can be maintained through the equipment maintenance port 17. And when the maintenance is completed, the equipment maintenance port 17 can be closed through the maintenance door 18 to ensure the airtightness of the sound insulation box body 1, improve the maintenance convenience and save the maintenance time.

[0065] In some embodiments, the NVH detection device 100 further includes a control cabinet 2. The control cabinet 2 is installed on the sound insulation box body 1 and is located outside the sound insulation cavity 14. The first vibration detection piece, the second vibration detection piece and the noise detection piece are electrically connected to the control cabinet 2.

[0066] Specifically, as Figure 3As shown, the NVH detection device 100 is also provided with a control cabinet 2. The control cabinet 2 can be installed on the sound insulation box 1 and is located outside the sound insulation cavity 14. That is, the control cabinet 2 can be fixedly connected to the sound insulation box 1 through connecting parts or the like. In actual setting, the control cabinet 2 can also be directly placed outside the sound insulation box 1. Electric control mounting plates, data cards, industrial computers and other components related to detection can be installed in the control cabinet 2. The control cabinet 2 is provided with a display, which can directly display the relevant data curves and detection results processed by the software. And the control cabinet 2 can upload the corresponding data and results to the MES system for later comparison and so on.

[0067] Furthermore, the first vibration detection part, the second vibration detection part and the noise detection part arranged in the sound insulation box 1 can all be electrically connected to the control cabinet 2. That is, the vibration and noise results of the test piece 101 detected by the first vibration detection part and the second vibration detection part can be transmitted to the control cabinet 2, and the vibration result of the push rod 41 detected by the second vibration detection part can also be transmitted to the control cabinet 2, and then can be processed by the software in the control cabinet 2.

[0068] At the same time, the NVH detection device 100 is provided with a variety of detection methods to detect the performance of the test piece 101. The first method is to energize the test piece 101, the test piece 101 runs, and the noise detection part detects the noise data of the test piece 101. The software in the control cabinet 2 judges the performance of the test piece 101 through the corresponding data; the second method is to energize the test piece 101, and the first vibration detection part and the noise detection part respectively detect the vibration and noise data of the test piece 101. The software in the control cabinet 2 comprehensively judges the performance of the test piece 101 based on the noise and vibration data; the third method is to energize the test piece 101, the push rod 41 pushes the test piece 101 to move, the first vibration detection part detects the vibration data of the test piece 101, and the second vibration detection part detects the vibration data of the push rod 41 and the test piece 101. The software in the control cabinet 2 judges the performance of the test piece 101 through the vibration data of the test piece 101 after excluding the vibration data of the push rod 41. It has high flexibility in use and can improve the detection accuracy.

[0069] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0070] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An NVH testing device, characterized in that: include: A soundproof box body, wherein a soundproof cavity is formed in the soundproof box body, the soundproof cavity is provided with a take-in and put-out opening, and the take-in and put-out opening is provided with a take-in and put-out door that can be opened and closed; A testing mechanism and a push rod mechanism, both of which are located in the sound insulation cavity, the testing mechanism includes a positioning fixture and a pressing fixture, the positioning fixture is suitable for selectively extending from the access opening for taking and placing the test piece, the pressing fixture is used to press the test piece carried by the positioning fixture, and the push rod mechanism includes a push rod, which is movable relative to the test piece and is used to press the test piece; A first vibration detector, a second vibration detector and a noise detector, wherein the first vibration detector and the noise detector are located in the soundproof cavity and are used to detect the vibration and noise of the test piece respectively, and the second vibration detector is installed on the push rod and is used to detect the vibration of the push rod.

2. The NVH detection equipment according to claim 1, characterized in that: It also includes a test rack, which is installed in the sound insulation chamber, and the test mechanism and the push rod mechanism are both installed on the test rack; The positioning fixture can be slidably mounted on the test frame to slide in or out relative to the access opening, and the pressing fixture can be lifted and lowered above the test frame to move closer to or farther away from the pressing fixture.

3. The NVH detection equipment according to claim 2, characterized in that: The push rod mechanism is located at a side of the test mechanism away from the access opening, and the push rod is suitable for moving along the sliding direction of the positioning fixture to approach or move away from the test piece carried by the positioning fixture.

4. The NVH detection equipment according to claim 2, characterized in that: The first vibration detection component and the noise detection component are both installed on the test frame, and the positioning fixture is suitable for sliding to the top of the first vibration detection component and the noise detection component.

5. The NVH detection equipment according to claim 2, characterized in that: The testing mechanism comprises a telescopic driving member and a pressing driving member mounted on the testing frame; The telescopic driving member is connected to the positioning fixture and is used to drive the positioning fixture to slide relative to the test frame, and the clamping driving member is connected to the clamping fixture and is used to drive the clamping fixture to rise and fall relative to the test frame.

6. The NVH testing device according to claim 2, characterized in that: The test frame includes a mechanism mounting plate and a frame body, wherein the mechanism mounting plate is mounted above the frame body, the test mechanism and the push rod mechanism are both mounted on the mechanism mounting plate, the frame body is provided with a plurality of first legs, and a first vibration isolation foot is provided at the bottom of the first leg.

7. The NVH testing device according to claim 1, characterized in that: The soundproof box includes a frame outer wall plate, a soundproof component and a sound-absorbing perforated plate. The soundproof cavity is defined in the frame outer wall plate. The sound-absorbing perforated plate is installed on the inner side of the frame outer wall plate. The soundproof component is arranged between the frame outer wall plate and the sound-absorbing perforated plate.

8. The NVH detection device according to claim 7, characterized in that: The sound insulation component comprises an inner sound absorbing cotton layer, a partition plate and an outer sound absorbing cotton layer, wherein the inner sound absorbing cotton layer, the partition plate and the outer sound absorbing cotton layer are sequentially distributed between the sound absorbing hole plate and the outer wall plate of the frame along the inner and outer directions.

9. The NVH testing device according to claim 1, characterized in that: The soundproof box is also provided with an equipment maintenance port, and the equipment maintenance port is provided with a maintenance door that can be opened and closed.

10. The NVH testing device according to claim 1, characterized in that: It also includes a control cabinet, which is installed on the soundproof box and located outside the soundproof cavity. The first vibration detector, the second vibration detector and the noise detector are electrically connected to the control cabinet.

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