Rotating motor NVH vibration test equipment

Abstract

The invention discloses rotating motor NVH vibration test equipment, which comprises a machine table, a sound insulation box and a test device arranged in the sound insulation box, and is characterized in that the test device comprises a substrate, a first bracket, a second bracket and a third bracket; a motor clamp and two clamping cylinders are arranged on the first bracket; the two clamping air cylinders are located on the two sides of the motor clamp oppositely. A first linear module, a second linear module, a third linear module and an angle adjusting plate are sequentially arranged on the second support, the first linear module is used for driving the second linear module to reciprocate in the X-axis direction, and the second linear module is used for driving the third linear module to move in the Y-axis direction. The third linear module is used for driving the angle adjusting plate to rotate around the X axis; a vibration sensor driving cylinder is arranged on the angle adjusting plate, a piston rod of the vibration sensor driving cylinder is connected with a guide rod, and a vibration sensor is arranged on the guide rod; and a microphone is arranged on the third bracket. The technical scheme provided by the invention can be adapted to the NVH vibration test of small motors such as a central control screen rotating motor, and the equipment is compact in structure, small in occupied area and convenient to operate.

Description

Technical Field

[0001] This invention relates to the field of motor testing technology, and in particular to a rotating motor NVH vibration testing device. Background Technology

[0002] In the electric vehicle field, the rotating motor of the central control screen, as a core component for achieving adaptive screen rotation, directly impacts the user experience with its NVH (Noise, Vibration, Harshness) performance. Even minor vibrations or abnormal noises can be amplified by the quiet environment inside the vehicle. These rotating motors are typically designed for miniaturization, requiring highly flexible and compact testing equipment. Existing motor NVH testing equipment is usually designed for large industrial-grade motors, including large fixed stands, conveyor chains, transfer units, and testing units. This results in a large overall size, occupying significant production space and incurring high costs due to its heavy-duty structure. In view of these technical problems, and considering the miniaturization characteristics of the rotating motor of the central control screen, this invention proposes a rotating motor NVH vibration testing device. This device is compact, flexible in adjustment, and allows for manual loading and unloading, simplifying the operation process and saving space while ensuring testing accuracy. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a rotary motor NVH vibration testing device, which aims to solve the technical problem of the lack of NVH testing device for the rotary motor of the central control screen of electric vehicles in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A rotary motor NVH vibration testing device includes a machine base, a soundproof box, and a testing device disposed inside the soundproof box. The testing device includes a base plate, a first support, a second support, and a third support. A motor clamp and two clamping cylinders are mounted on the first support. The two clamping cylinders are located on opposite sides of the motor clamp. A first linear module, a second linear module, a third linear module, and an angle adjustment plate are sequentially mounted on the second support. The first linear module drives the second linear module to reciprocate along the X-axis, the second linear module drives the third linear module to move along the Y-axis, and the third linear module drives the angle adjustment plate to rotate around the X-axis. A vibration sensor drive cylinder is mounted on the angle adjustment plate, and the piston rod of the vibration sensor drive cylinder is connected to a guide rod, on which a vibration sensor is mounted. A microphone is mounted on the third support.

[0005] Furthermore, in the aforementioned rotating motor NVH vibration testing equipment, the soundproof box includes a lower box body mounted on the machine platform and an upper box body rotatably connected to the lower box body, with a damper provided between the upper box body and the lower box body.

[0006] Furthermore, in the aforementioned rotary motor NVH vibration testing equipment, the first support includes an inclined plate and two support plates, and the motor clamp and two clamping cylinders are set on the inclined plate; noise detection avoidance holes are provided on the inclined plate.

[0007] Furthermore, in the aforementioned rotary motor NVH vibration testing equipment, the two clamping cylinders are of the same specification, and the output ends of the two clamping cylinders are respectively equipped with clamping plates.

[0008] Furthermore, in the aforementioned rotating motor NVH vibration testing equipment, the second support includes four legs and a top plate.

[0009] Furthermore, in the aforementioned rotary motor NVH vibration testing equipment, the first linear module includes a first fixed base, a first motor, a first ball screw, a first screw nut, and a first movable base mounted on the screw nut; the second linear module includes a second fixed base, a second motor, a second ball screw, a second screw nut, and a second movable base mounted on the screw nut; the third linear module includes a third fixed base bracket, a third fixed base, a third motor, a third ball screw, a third screw nut, and a third movable base mounted on the screw nut; the second fixed base is mounted on the first movable base, the third fixed base bracket is mounted on the second movable base, and the third fixed base is mounted on the third fixed base bracket.

[0010] Furthermore, in the aforementioned rotating motor NVH vibration testing equipment, the third fixed base support includes a horizontal plate and two vertical plates, one of which is provided with a pin, and an adjustment hole is provided on the vertical plate along the Y-axis direction; the angle adjustment plate is rotatably connected to the pin; the angle adjustment plate is provided with a positioning hole, and a positioning rod is connected to the third movable base, which passes through the adjustment hole and is inserted into the positioning hole.

[0011] Furthermore, in the aforementioned rotary motor NVH vibration testing equipment, an angle adjustment plate is connected to a cylinder mounting plate, and the angle adjustment plate and the cylinder mounting plate are vertically arranged; the vibration sensor drive cylinder is mounted on the cylinder mounting plate.

[0012] Furthermore, in the aforementioned rotary motor NVH vibration testing equipment, the third support includes a first round rod, a second round rod, and a third round rod; the first round rod is vertically arranged, the first round rod and the second round rod are connected by a cross tube clamp, the second round rod and the third round rod are connected by a cross tube clamp, and the microphone and the third round rod are connected by a cross tube clamp.

[0013] Beneficial effects: This invention provides a rotating electric motor NVH vibration testing device, which has at least the following advantages compared with the prior art: (1) There is no need to set up heavy-duty benches and complex conveying structures. Instead, the machine tool, soundproof box and testing device are integrated with a compact design, which greatly reduces the floor space and is suitable for the limited space layout of production lines or laboratories. At the same time, the manual loading and unloading mode is adopted, and the operator can quickly complete the motor positioning and fixture replacement, which significantly improves the efficiency of the changeover test for the rotary motor of the central control screen of different specifications.

[0014] (2) The vibration sensor can achieve precise displacement in the X-axis and Y-axis directions and angle adjustment around the X-axis through a three-level linear module. Combined with the fit-type contact design of the drive cylinder, it ensures stable adaptation with the motor test surface, and the vibration data acquisition error is greatly reduced. The microphone can be flexibly adjusted to the key point of noise monitoring through the combination of multi-round rod and cross tube clamp, and the noise signal is captured more comprehensively, ultimately achieving high accuracy and repeatability of NVH test data. Attached Figure Description

[0015] Figure 1 This is a 3D view of a rotating electric motor NVH vibration testing device.

[0016] Figure 2 This is a left view of the NVH vibration testing equipment for rotating electric motors.

[0017] Figure 3 This is a 3D view of the soundproof box.

[0018] Figure 4 For the three-dimensional test device Figure 1 .

[0019] Figure 5 for Figure 4 A magnified view of a portion of the S-region.

[0020] Figure 6 This is the left view of the test setup.

[0021] Figure 7 For the three-dimensional test device Figure 2 .

[0022] Figure 8 This is a 3D view of the first support.

[0023] Figure 9 The left view shows the second support, the first linear module, the second linear module, the third linear module, the adjustment plate, the vibration sensor drive cylinder, and the vibration sensor.

[0024] Figure 10 This is a three-dimensional view of the second support, the first linear module, the second linear module, the third linear module, the adjustment plate, the vibration sensor drive cylinder, and the vibration sensor.

[0025] Figure 11 This is a 3D view of the third linear module.

[0026] Figure 12 A 3D view of the third stand and microphone.

[0027] Explanation of reference numerals in the attached figures: 1. Machine tool; 19. Foot cup; 2. Soundproof enclosure; 21. Lower enclosure; 211. Bottom plate; 212. First back panel; 213. First side panel; 22. Upper enclosure; 221. Cover plate; 222. Second back panel; 223. Second side panel; 224. Front panel; 30. Base plate; 31. First bracket; 311. Inclined plate; 312. Support plate; 3101. Main hole of clearance hole; 3102. Secondary hole of clearance hole; 32. Second bracket; 321. Top plate; 324. Support leg; 33. Third bracket; 331. First round rod; 332. Second round rod; 333. Third round rod; 334. Cross tube clamp; 339. Microphone; 41. Motor clamp; 411. Fixed bottom mold; 4110. Through hole of fixed bottom mold; 412. Connector; 4120. Mounting hole on connector; 42. Clamping cylinder; 422. Clamping plate; 51. First linear module; 512. First fixed seat; 513. First ball screw; 514. First movable seat; 52. Second linear module; 522. Second fixed seat; 523. Second ball screw; 524. Second movable seat; 53. Third linear module; 531. Third fixed seat bracket; 532. Third fixed seat; 533. Third ball screw; 534. Third movable seat; 5311. Horizontal plate; 5312. Vertical plate; 535. Pin; 536. Positioning rod; 5360. Adjustment hole; 54. Angle adjustment plate; 540. Positioning hole; 55. Vibration sensor drive cylinder; 550. Cylinder mounting plate; 58. Guide rod; 59. Vibration sensor; A: Testing equipment. Detailed Implementation

[0028] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention.

[0029] Please see Figures 1 to 12 This invention provides an NVH vibration testing device for a rotating electric motor. The accompanying drawings are for illustrative purposes only and are not proportional to the actual product. The drawings only depict structures relevant to the innovation of this application; some conventional structures are not specifically shown. The terms "first," "second," etc., used herein are merely different names for similar structures for ease of explanation and are not intended to limit this application or indicate the priority of any particular structure.

[0030] The coordinate system is shown in the attached figure, and the X-axis and Y-axis are also mentioned in this article. However, this is only for the purpose of explanation and is not intended to limit this application, because even if the way the coordinate system is set is changed, the essence of the technical solution itself is not changed.

[0031] The rotary motor NVH vibration testing equipment includes a machine base 1, a soundproof box 2, and a testing device A installed inside the soundproof box. The testing device A includes a base plate 30, a first support 31, a second support 32, and a third support 33. A motor clamp 41 and two clamping cylinders 42 are installed on the first support. The two clamping cylinders are located on opposite sides of the motor clamp. A first linear module 51, a second linear module 52, a third linear module 53, and an angle adjustment plate 54 are sequentially installed on the second support 32. The first linear module drives the second linear module to reciprocate along the X-axis, the second linear module drives the third linear module to move along the Y-axis, and the third linear module drives the angle adjustment plate to rotate around the X-axis. A vibration sensor drive cylinder 55 is installed on the angle adjustment plate 54. The piston rod of the vibration sensor drive cylinder is connected to a guide rod 58, and a vibration sensor 59 is installed on the guide rod. A microphone 339 is installed on the third support.

[0032] The main body of the aforementioned machine tool can be welded from steel plates, with foot cups 19 at the four corners of the bottom for leveling the machine tool. A soundproof enclosure is installed over the entire surface of the machine tool, and sound-absorbing cotton (not shown in the attached diagram) is usually installed inside the enclosure to reduce external noise to below 25dB, meeting the low-noise environment requirements for NVH testing of rotating motors.

[0033] Please see Figure 3 Furthermore, the soundproof enclosure 2 includes a lower enclosure 21 mounted on the machine platform and an upper enclosure 22 rotatably connected to the lower enclosure. A damper 23 is provided between the upper and lower enclosures. When the upper and lower enclosures are open, it facilitates the loading and unloading of materials by the rotary motor. When the upper and lower enclosures are closed, they form a soundproof space for NVH testing. By providing dampers (preferably two dampers), a buffering effect is achieved when the upper enclosure is closed, preventing violent impact between the upper and lower enclosures. Preferably, two dampers 23 are provided, i.e., one damper is provided on each of the left and right sides of the soundproof enclosure. As can be seen in the attached drawings, a protective plate 24 is provided on the outer side of each damper to prevent operators from being accidentally pinched by the upper enclosure during the closing process.

[0034] Please see Figure 2 and Figure 3The lower enclosure 21 of the aforementioned soundproof enclosure includes a bottom plate 211, a first back plate 212, and two first side plates 213 on both sides. The upper enclosure 22 includes a cover plate 221, a second back plate 222, two second side plates 223, and a front plate 224. The first and second back plates are rotatably connected to the upper and lower enclosures via hinges or other means. The inner walls of both the upper and lower enclosures are lined with sound-absorbing cotton (not shown in the figure) to ensure good sound insulation.

[0035] The first bracket 31, the second bracket 32 ​​and the third bracket 33 are disposed on the substrate 30, and the substrate is disposed in the lower housing.

[0036] The testing equipment inside the soundproof box will be described in detail below.

[0037] Please see Figures 4 to 7 Furthermore, the first support includes an inclined plate 311 and two support plates 312. A motor clamp 41 and two clamping cylinders 42 are mounted on the inclined plate 311. Noise detection clearance holes are provided on the inclined plate. The two support plates are symmetrically mounted on a base plate, which is mounted on the two support plates. After the motor under test is mounted on the motor clamp, the motor's axis is perpendicular to the inclined plate. The angle between the support plate and the base plate is approximately 60°~75°, which facilitates loading and unloading of the motor under test by the operator.

[0038] Please see Figure 5 In practical applications, motor clamps can be implemented in various ways. Since this invention does not aim to propose a new motor clamp, only a brief description of the motor clamp is provided here. The motor clamp 41 includes structures such as a fixed base mold 411 and a connector 412. The fixed base mold 411 is fixedly connected (e.g., bolted) to the inclined plate 311, and the connector 412 is detachably connected (e.g., bolted) to the fixed base mold 411. The fixed base mold has a through hole 4110, allowing the spindle of the motor under test to pass through. The connector is generally a ring-shaped connector, adapted to the end structure (such as end caps, flanges, etc.) of the motor under test. The connector has multiple mounting holes 4120 along its circumference for connecting to the motor under test via bolts or other means. When testing different specifications of central control screen rotary motors, only the corresponding connector needs to be replaced to match the shape of the connector to the motor under test.

[0039] Please see Figure 8 The aforementioned noise detection clearance hole includes a rectangular, interconnected main hole 3101 and a secondary hole 3102. The length of the main hole along the X-axis is greater than the length of the fixed base mold along the X-axis; the secondary hole corresponds to the through hole on the fixed base mold, allowing the main shaft of the motor under test to pass through the inclined plate without interfering with the main shaft of the motor under test.

[0040] Furthermore, the two clamping cylinders 42 are of the same specification, and the output ends of the two clamping cylinders are respectively provided with clamping plates 422. Figure 5 Only one clamping plate 422 is shown. Preferably, the clamping plate is made of rubber, and the inner contour of the clamping plate is adapted to the contour of the clamped part of the motor under test. After the motor under test is placed in the motor fixture, the two clamping cylinders push the corresponding clamping plates toward the center, thereby assisted in clamping the motor under test and preventing the motor from displacing or shaking due to vibration generated during operation.

[0041] Please see Figure 9 and Figure 10 In practical applications, the structure of the second support can be implemented in various ways. Here, a suggested second support is provided: The second support 32 includes four legs 324 and a top plate 321. The four legs of the second support are set on the base plate to support the first linear module, the second linear module, the third linear module, and other structures.

[0042] Please continue reading. Figure 9 and Figure 10 Since linear modules are existing technology and have multiple implementation methods, the specific structures of each linear module will not be described in detail here, but only briefly. Further, the first linear module 51 group includes a first fixed base 512, a first motor (not shown in the figure), a first ball screw 513, a first screw nut (not shown in the figure), and a first movable base 514 disposed on the screw nut; the second linear module includes a second fixed base 522, a second motor (not shown in the figure), a second ball screw 523, a second screw nut (not shown in the figure), and a second movable base 524 disposed on the screw nut; the third linear module includes a third fixed base bracket 531, a third fixed base 532, a third motor (not shown in the figure), a third ball screw 533, a third screw nut (not shown in the figure), and a third movable base 534 disposed on the screw nut; the second fixed base 522 is disposed on the first movable base 514, the third fixed base bracket 531 is disposed on the second movable base 524, and the third fixed base 532 is disposed on the third fixed base bracket 531. Linear modules using ball screws are existing technology, and the ball screw, screw nut, and other related structures are not specifically shown in the diagram. Although the first, second, and third motors are not specifically depicted in the diagram, this does not affect those skilled in the art's understanding of the working principles of the aforementioned linear modules. For example, the first motor drives the first ball screw to rotate (the first ball screw does not move linearly), while the first screw nut moves linearly (without rotating), thereby driving the first moving seat to move linearly along the X-axis. The motion principles of the second and third linear modules are the same and will not be elaborated upon here.

[0043] Please see Figures 9 to 11The principle of angle adjustment is further explained below. The third fixed support bracket 531 includes a horizontal plate 5311 and two vertical plates 5312. One of the vertical plates has a pin 535. An adjustment hole 5360 is formed along the Y-axis on this side plate (i.e., the vertical plate with the pin). The angle adjustment plate 54 is rotatably connected to the pin. The angle adjustment plate 54 has a positioning hole 540. A positioning rod 536 is connected to the third movable seat, passing through the adjustment hole and inserting into the positioning hole. The third motor of the third linear module drives the third ball screw to rotate, thereby causing the third movable seat to move linearly. Since the positioning rod is set on the third movable seat, it also moves linearly. During the linear movement of the positioning rod, it drives the angle adjustment plate to rotate around the pin, thus achieving angle adjustment.

[0044] Furthermore, the aforementioned positioning rod 536 is a round rod, and the positioning hole is a round hole or an oblong hole (the attached figure shows an oblong hole). This design ensures that after the positioning rod is inserted into the positioning hole, the adjusting plate will not interfere with the positioning rod when it rotates.

[0045] As can be seen from the attached diagram, the adjustment hole 5360 is an oblong hole and is set horizontally. After the positioning rod passes through the adjustment hole, it is limited by the adjustment hole and can only move linearly along the Y-axis.

[0046] enter Figure 10 As shown, further, the angle adjustment plate 54 is connected to the cylinder mounting plate 550, and the angle adjustment plate and the cylinder mounting plate are arranged perpendicularly; the vibration sensor drive cylinder is mounted on the cylinder mounting plate. When the angle adjustment plate rotates, it can drive the vibration sensor drive cylinder to rotate, thereby realizing the adjustment of the vibration sensor angle.

[0047] Please see Figure 12 Furthermore, the third bracket 33 includes a first round rod 331, a second round rod 332, and a third round rod 333; the first round rod 331 is vertically arranged, the first round rod 331 and the second round rod 332 are connected by a cross-shaped tube clamp 334, the second round rod 332 and the third round rod 333 are also connected by a cross-shaped tube clamp 334, and the microphone 339 is also connected to the third round rod 333 by a cross-shaped tube clamp 334. This arrangement facilitates the adjustment of the microphone's position and angle.

[0048] To make it easier to understand, the operation process is briefly described below.

[0049] (1) Before testing, open the upper chamber of the soundproof box and position the rotary motor of the central control screen to be tested using the motor clamp. The connector is adapted to the end structure of the motor to achieve initial fixation. The clamping cylinders on both sides move synchronously to push the clamping plates closer to the center, completing the auxiliary clamping of the motor and avoiding displacement due to vibration during the test. After closing the upper chamber, the sound-absorbing cotton on the inner wall of the soundproof box weakens the external noise to a stable low-noise test environment.

[0050] (2) Vibration sensor adjustment: The first linear module drives the second linear module to move along the X-axis, and the second linear module drives the third linear module to move along the Y-axis to achieve planar position calibration of the vibration sensor; the third linear module drives the positioning rod to move along the adjustment hole, which drives the angle adjustment plate to rotate around the pin shaft, thereby adjusting the tilt angle of the vibration sensor to ensure that it is compatible with the motor test surface. Finally, the vibration sensor drive cylinder pushes the guide rod to extend, so that the vibration sensor fits against the motor test part.

[0051] Microphone adjustment: By loosening the cross clamp, the relative position and angle of the first, second, and third round rods can be flexibly adjusted to accurately place the microphone at the key monitoring point of motor noise radiation; after adjustment, tighten the cross clamp.

[0052] (3) After the motor is powered on and started, the vibration sensor collects the vibration data during the motor operation in real time, and the microphone captures the noise signal synchronously. After the test is completed, the vibration sensor drives the cylinder to reset the guide rod, the clamping cylinder releases the clamping plate, and the upper box can be opened to take out the motor, thus completing a single test process.

[0053] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. It is understood that those skilled in the art can make equivalent substitutions or modifications based on the technical solution and inventive concept of the present invention, and all such modifications or substitutions should fall within the protection scope of the present invention.

Claims

1. A rotating electric motor NVH vibration testing device, comprising a machine base, a soundproof box, and a testing device disposed within the soundproof box, characterized in that: The testing device includes a base plate, a first support, a second support, and a third support. A motor clamp and two clamping cylinders are mounted on the first support. The two clamping cylinders are positioned opposite each other on either side of the motor clamp. A first linear module, a second linear module, a third linear module, and an angle adjustment plate are sequentially mounted on the second support. The first linear module drives the second linear module to reciprocate along the X-axis, the second linear module drives the third linear module to move along the Y-axis, and the third linear module drives the angle adjustment plate to rotate around the X-axis. A vibration sensor drive cylinder is mounted on the angle adjustment plate, and the piston rod of the vibration sensor drive cylinder is connected to a guide rod, on which a vibration sensor is mounted. A microphone is mounted on the third support.

2. The NVH vibration testing equipment for rotating electric motors according to claim 1, characterized in that: The soundproof enclosure includes a lower enclosure mounted on the machine platform and an upper enclosure rotatably connected to the lower enclosure, with a damper installed between the upper and lower enclosures.

3. The NVH vibration testing equipment for rotating electric motors according to claim 1, characterized in that: The first bracket includes an inclined plate and two support plates. The motor clamp and two clamping cylinders are set on the inclined plate; noise detection and avoidance holes are opened on the inclined plate.

4. The NVH vibration testing equipment for rotating electric motors according to claim 1 or 2, characterized in that: The two clamping cylinders are of the same specification, and each of the two clamping cylinders has a clamping plate at its output end.

5. The NVH vibration testing equipment for rotating electric machines according to claim 1, characterized in that: The second support consists of four legs and a top plate.

6. The NVH vibration testing equipment for rotating electric motors according to claim 1, characterized in that: The first linear module includes a first fixed base, a first motor, a first ball screw, a first screw nut, and a first movable seat mounted on the screw nut; the second linear module includes a second fixed base, a second motor, a second ball screw, a second screw nut, and a second movable seat mounted on the screw nut; the third linear module includes a third fixed base bracket, a third fixed base, a third motor, a third ball screw, a third screw nut, and a third movable seat mounted on the screw nut; the second fixed base is mounted on the first movable seat, the third fixed base bracket is mounted on the second movable seat, and the third fixed base is mounted on the third fixed base bracket.

7. The NVH vibration testing equipment for rotating electric machines according to claim 5, characterized in that: The third fixed support bracket includes a horizontal plate and two vertical plates. One of the vertical plates is provided with a pin, and an adjustment hole is opened on the vertical plate along the Y-axis. An angle adjustment plate is rotatably connected to the pin. The angle adjustment plate is provided with a positioning hole, and a positioning rod is connected to the third movable seat. The positioning rod passes through the adjustment hole and is inserted into the positioning hole.

8. The NVH vibration testing equipment for rotating electric machines according to claim 6, characterized in that: An angle adjustment plate is connected to a cylinder mounting plate, and the angle adjustment plate and the cylinder mounting plate are set perpendicularly; the vibration sensor drives the cylinder, which is mounted on the cylinder mounting plate.

9. The NVH vibration testing equipment for rotating electric machines according to claim 1, characterized in that: The third bracket includes a first round rod, a second round rod, and a third round rod; the first round rod is set vertically, the first round rod and the second round rod are connected by a cross tube clamp, the second round rod and the third round rod are connected by a cross tube clamp, and the microphone and the third round rod are connected by a cross tube clamp.

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