A multi-station automatic vibration abnormal sound testing device for automobile parts

Abstract

The utility model discloses a kind of for automobile parts's multi-station automatic vibration abnormal sound testing device, it is related to abnormal sound testing device technical field, including the base frame of the vehicle chassis below being set and the sound acquisition module for collecting vibration abnormal sound being set on it, sound collection mechanism is equipped on base frame, and sound collection mechanism includes screw rod being set on base frame and rotating freely in vertical direction, directional assembly is equipped on vertical seat part and limits the horizontal position of screw rod;The utility model can realize the sound acquisition process of all-around to vehicle chassis position by setting sound collection mechanism, ensure the sound signal of each key part of automobile chassis, not miss any potential abnormal sound source, and then improve the comprehensiveness and accuracy of abnormal sound detection, provide more reliable data support for quality control and fault diagnosis of automobile parts.

Description

Technical Field

[0001] This utility model relates to the technical field of abnormal noise testing devices, specifically a multi-station automatic vibration and abnormal noise testing device for automotive parts. Background Technology

[0002] In the daily use of a car, vibration and abnormal noise of parts have always been one of the important factors affecting driving comfort. Vibration and abnormal noise not only reduce the driving experience, but may also indicate potential quality problems of parts, such as loosening or damage, which in turn affect the driving safety and reliability of the car.

[0003] Traditional vibration and abnormal noise detection methods usually rely on manual operation, where technicians use handheld sound acquisition devices to conduct detection during vehicle operation or under simulated driving conditions. Manual inspection requires technicians to check each part of the vehicle one by one, which is time-consuming and labor-intensive, and it is easy to miss potential sources of abnormal noise. At the same time, when simulating vehicle driving conditions, the shaking of the vehicle can cause inconvenience to the technicians in the abnormal noise acquisition process. Therefore, a multi-station automatic vibration and abnormal noise testing device for automotive parts is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a multi-station automatic vibration and noise testing device for automotive parts, which has the advantages of improving the comprehensiveness and accuracy of noise detection, and solves the problem that manual testing is unchanging and may miss potential sources of noise.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-station automatic vibration and noise testing device for automotive parts, including a base frame set under the vehicle chassis and a sound acquisition module set on it for collecting vibration and noise, wherein the base frame is provided with a radio mechanism that drives the sound acquisition module to reciprocate in the horizontal direction along the laying direction of the base frame and the movement stroke is adjustable.

[0006] The radio mechanism includes a lead screw mounted on a base frame and freely rotating in the vertical direction. The base frame includes an integrally formed frame portion and a support portion. The lead screw slides through the frame portion and the support portion. The support portion is provided with an orientation component that limits the horizontal position of the lead screw.

[0007] The lead screw is threaded with a co-position seat, the sound acquisition module is fixedly connected to the co-position seat, the base frame is provided with a spline rod arranged parallel to the lead screw, the co-position seat is slidably sleeved on the spline rod, the two ends of the spline rod are respectively fixedly connected to the frame part and the stand part, and the frame part is provided with a direction-changing component for adjusting the direction of the lead screw.

[0008] The base frame is equipped with a self-clamping assembly for mounting to the vehicle chassis.

[0009] Preferably, the orientation component includes a positioning cylinder fixedly sleeved on the lead screw. The positioning cylinder includes an integrally formed left-side blocking groove and a right-side blocking groove. The upright part is provided with a pressing pin and has a receiving groove for sliding connection of the pressing pin. A return spring is provided in the receiving groove. The two ends of the return spring are fixedly connected to the upright part and the pressing pin, respectively.

[0010] The positioning pin makes sliding contact with the outer peripheral surface of the positioning cylinder.

[0011] Preferably, the reversing assembly includes a drive bevel gear that rotates on a fixed axis on the frame portion and rotates freely in the vertical direction. The frame portion is provided with a motor for driving the drive bevel gear to rotate. The drive bevel gear is meshed with a first driven bevel gear and a second driven bevel gear. The first driven bevel gear and the second driven bevel gear are arranged opposite to each other and rotate in opposite directions.

[0012] Both the first driven bevel gear and the second driven bevel gear rotate on the frame portion around a fixed axis, and both the first driven bevel gear and the second driven bevel gear have a one-way side tooth ring fixed coaxially on their opposite surfaces.

[0013] The lead screw slides through the first driven bevel gear and the second driven bevel gear, and a bidirectional external toothed ring is fixedly sleeved on the lead screw. The bidirectional external toothed ring is meshed with two sets of unidirectional side toothed rings.

[0014] Preferably, the bidirectional external toothed ring is always and simultaneously engaged with only one set of unidirectional side toothed rings.

[0015] Preferably, the reversing assembly further includes two sets of horizontal plates sleeved on the spline rod, and a groove is provided on the base frame for the two sets of horizontal plates to slide horizontally. The opposing surfaces of the two sets of horizontal plates are provided with constant pressure springs, which are sleeved on the spline rod, and the ends of the spline rod are fixedly connected to the horizontal plates.

[0016] The horizontal plate is threaded with positioning bolts.

[0017] Preferably, the self-clamping assembly includes multiple sets of threaded cylinders disposed on a base frame, and the base frame has a groove for the multiple sets of threaded cylinders to slide horizontally.

[0018] Each of the multiple sets of threaded cylinders is threaded with a stud, and a clamp is fixedly connected to the end of the stud away from the threaded cylinder. The clamp is provided with an inner pressure plate for clamping the vehicle chassis.

[0019] The threaded cylinder is threaded with locking bolts that restrict its horizontal position.

[0020] Preferably, the clamp is provided with a rectangular groove for sliding connection of the inner pressure plate, and the inner pressure plate has a fixed-axis rotating anti-pressure screw, which is threadedly connected to the clamp.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0022] 1. By setting up a radio mechanism, this utility model can realize the all-round sound collection process of the vehicle chassis, ensuring that the sound signals of all key parts of the car chassis are covered and no potential abnormal noise sources are missed. This improves the comprehensiveness and accuracy of abnormal noise detection and provides more reliable data support for the quality control and fault diagnosis of automotive parts.

[0023] 2. This utility model, by setting a reversing component, can automatically change the direction of the lead screw, causing the sound acquisition module to reciprocate in the horizontal direction without manual intervention. Moreover, the travel distance and travel position of the sound acquisition module can be freely adjusted according to actual needs to meet the testing requirements of different vehicles. Attached Figure Description

[0024] Figure 1 This is a schematic diagram showing the position of the base frame of this utility model relative to the vehicle.

[0025] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 3 This is a schematic diagram of the components containing the frame and the base of this utility model;

[0027] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle;

[0028] Figure 5 This utility model Figure 3 Enlarged view at point B in the middle;

[0029] Figure 6 This is a schematic diagram of the component containing the corresponding seat of this utility model;

[0030] Figure 7 This is a schematic diagram of the component containing the bidirectional external toothed ring of this utility model;

[0031] Figure 8 This is a schematic diagram of the component containing the clamp of this utility model.

[0032] In the diagram: 1. Base frame; 101. Frame section; 102. Stand section; 2. Sound acquisition module; 3. Lead screw; 4. Corresponding seat; 5. Spline rod; 6. Driving bevel gear; 7. Driven bevel gear No. 1; 8. Driven bevel gear No. 2; 9. Bidirectional external gear ring; 10. Unidirectional side gear ring; 11. Positioning cylinder; 111. Left-direction blocking groove; 112. Right-direction blocking groove; 12. Pressing pin; 13. Return spring; 14. Horizontal plate; 15. Constant pressure spring; 16. Threaded cylinder; 17. Stud; 18. Clamp; 19. Inner pressure plate; 20. Pressing screw. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Please see Figures 1 to 8 This utility model provides a technical solution: a multi-station automatic vibration and abnormal noise testing device for automotive parts, including a base frame 1 set under the vehicle chassis and a sound acquisition module 2 set on it for collecting vibration and abnormal noise. The base frame 1 is provided with a radio mechanism that drives the sound acquisition module 2 to reciprocate in the horizontal direction along the laying direction of the base frame 1 and the movement stroke is adjustable.

[0035] The radio mechanism includes a lead screw 3 mounted on a base frame 1 and freely rotating in the vertical direction. The base frame 1 includes an integrally formed frame portion 101 and a base portion 102. The lead screw 3 slides through the frame portion 101 and the base portion 102. The base portion 102 is provided with an orientation component that limits the horizontal position of the lead screw 3.

[0036] The lead screw 3 is threadedly connected to a co-position seat 4, the sound acquisition module 2 is fixedly connected to the co-position seat 4, the base frame 1 is provided with a spline rod 5 arranged parallel to the lead screw 3, the co-position seat 4 is slidably sleeved on the spline rod 5, the two ends of the spline rod 5 are respectively fixedly connected to the frame part 101 and the stand part 102, and the frame part 101 is provided with a direction-changing component for adjusting the direction of the lead screw 3.

[0037] The base frame 1 is equipped with a self-clamping assembly for mounting to the vehicle chassis.

[0038] like Figures 1-3 As shown, when detecting vibration and abnormal noise of components in the vehicle chassis, the self-clamping assembly adapts to the spacing of the longitudinal beams in the vehicle chassis, so that the base frame 1 and the components on it can be stably suspended below the chassis. When the lead screw 3 rotates in the vertical direction, the co-position seat 4 slides on the spline rod 5, and the two ends of the spline rod 5 are fixedly set on the frame part 101 and the stand part 102. Therefore, under the restriction of the spline rod 5, the co-position seat 4 cannot rotate with the lead screw 3. Thus, when the lead screw 3 rotates, it can cause the co-position seat 4 and the sound acquisition module 2 fixed on it to move in the horizontal direction.

[0039] Meanwhile, the direction-changing component can change the rotation direction of the lead screw 3 in the vertical direction. Thus, when the direction of the lead screw 3 changes, the movement directions of the co-position 4 and the sound acquisition module 2 are opposite. Therefore, after the co-position 4 and the sound acquisition module 2 are at the set end position of the stroke, the direction of the lead screw 3 can be automatically changed by the direction-changing component, so that the co-position 4 and the sound acquisition module 2 can reciprocate in the horizontal direction. Furthermore, by changing the relative position of the base frame 1 and the vehicle chassis, the omnidirectional sound acquisition process of the vehicle can be realized. This allows the testing device to cover the sound signals of various key parts inside the car, ensuring that no potential abnormal noise sources are missed.

[0040] Meanwhile, the horizontal travel of the co-position 4 and the sound acquisition module 2 can be freely adjusted by the direction-changing component, thereby enabling the co-position 4 and the sound acquisition module 2 to reciprocate within any horizontal travel range. This allows for centralized detection of a certain component at the chassis location. The abnormal noise acquisition range of the sound acquisition module 2 can be freely adjusted according to actual usage requirements to further improve testing efficiency.

[0041] In one preferred embodiment, the orientation component includes a positioning cylinder 11 fixedly sleeved on the lead screw 3. The positioning cylinder 11 includes an integrally formed left-side blocking groove 111 and a right-side blocking groove 112. The support portion 102 is provided with a pressing pin 12 and has a receiving groove for sliding connection of the pressing pin 12. A return spring 13 is provided in the receiving groove. The two ends of the return spring 13 are fixedly connected to the support portion 102 and the pressing pin 12, respectively.

[0042] The pressure pin 12 makes sliding contact with the outer peripheral surface of the positioning cylinder 11.

[0043] like Figure 3 and Figure 4 As shown, driven by the elastic potential energy of the return spring 13, the pressure pin 12 can enter the left-side blocking groove 111 or the right-side blocking groove 112. Thus, through the return spring 13, the horizontal position of the positioning cylinder 11 and the lead screw 3 can be restricted to prevent the lead screw 3 from moving arbitrarily in the horizontal direction during rotation. Furthermore, the return spring 13 slides in contact with the outer circumferential surface of the positioning cylinder 11, thus preventing motion interference to the rotation process of the lead screw 3 and the positioning cylinder 11.

[0044] At the same time, when the rotation direction of the lead screw 3 changes, it will move a certain distance in the horizontal direction, thereby causing the left-side blocking groove 111 and the right-side blocking groove 112 to alternately correspond with the pressure pin 12. Therefore, no matter how the lead screw 3 rotates, its horizontal position can be restricted by the pressure pin 12.

[0045] Based on the orientation component embodiment, the reversing component includes an active bevel gear 6 that rotates on a fixed axis on a frame portion 101 and rotates freely in the vertical direction. A motor for driving the active bevel gear 6 to rotate is provided on the frame portion 101. The active bevel gear 6 is meshed with a first driven bevel gear 7 and a second driven bevel gear 8. The first driven bevel gear 7 and the second driven bevel gear 8 are arranged opposite to each other and rotate in opposite directions.

[0046] Both the first driven bevel gear 7 and the second driven bevel gear 8 are fixedly rotatable on the frame portion 101, and one-way side toothed rings 10 are coaxially fixed on the opposite surfaces of the first driven bevel gear 7 and the second driven bevel gear 8. The lead screw 3 slides through the first driven bevel gear 7 and the second driven bevel gear 8, and a two-way external toothed ring 9 is fixedly sleeved on the lead screw 3. The two-way external toothed ring 9 is meshed with both sets of one-way side toothed rings 10. The two-way external toothed ring 9 is always and simultaneously only meshed with one set of one-way side toothed rings 10.

[0047] The reversing assembly also includes two sets of horizontal plates 14 sleeved on the spline rod 5. The base frame 1 has a groove for the two sets of horizontal plates 14 to slide horizontally. The opposite surfaces of the two sets of horizontal plates 14 are provided with constant pressure springs 15. The constant pressure springs 15 are sleeved on the spline rod 5, and the ends of the spline rod 5 are fixedly connected to the horizontal plates 14. The horizontal plates 14 are threaded with positioning bolts.

[0048] like Figure 3 , Figure 5 and Figure 7 As shown, when the bidirectional external gear ring 9 meshes with the one-way side gear ring 10 on the second driven bevel gear 8, the lead screw 3 rotates in the forward direction. At this time, it drives the co-position seat 4 and the sound acquisition module 2 to move to the left in the horizontal direction until the co-position seat 4 is squeezed by the left constant pressure spring 15. The constant pressure spring 15 is compressed and deformed, and applies a thrust to the co-position seat 4 and the lead screw 3 to move to the right. Under the action of this thrust, the co-position seat 4 and the lead screw 3 move to the right a certain distance. Then, the bidirectional external gear ring 9 meshes with the one-way side gear ring 10 on the first driven bevel gear 7. Therefore, the lead screw 3 rotates in the reverse direction in the vertical direction. After that, the co-position seat 4 and the sound acquisition module 2 move to the right in the horizontal direction until the co-position seat 4 is squeezed and contacted by the right constant pressure spring 15. Its direction of movement changes again. Therefore, the horizontal stroke range of the co-position seat 4 and the sound acquisition module 2 is determined by the horizontal distance between the two sets of constant pressure springs 15.

[0049] One end of the constant pressure spring 15 is fixedly connected to the horizontal plate 14. By changing the position and spacing of the two sets of horizontal plates 14 on the base frame 1 and locking the two sets of horizontal plates 14 with positioning bolts, the stroke length and stroke position of the sound acquisition module 2 can be freely adjusted according to the actual detection position to meet different detection needs.

[0050] Based on the embodiment of the reversing component, the self-clamping component includes multiple sets of threaded cylinders 16 disposed on the base frame 1, and the base frame 1 is provided with a groove 2 for the multiple sets of threaded cylinders 16 to slide horizontally.

[0051] Each of the multiple sets of threaded cylinders 16 is threaded with a stud 17. The end of the stud 17 away from the threaded cylinder 16 is fixedly connected to a clamp 18. The clamp 18 is provided with an inner pressure plate 19 for clamping the vehicle chassis. The threaded cylinder 16 is threaded with a locking bolt that limits its horizontal position.

[0052] The clamp 18 has a rectangular groove for sliding connection of the inner pressure plate 19. The inner pressure plate 19 has a fixed axis rotating pressure screw 20, which is threadedly connected to the clamp 18.

[0053] like Figure 2 , Figure 3 and Figure 8 As shown, the mounting position of the base frame 1 on the chassis is changed according to the location to be detected on the vehicle chassis. In actual use, the relative positions of multiple sets of threaded cylinders 16 on the base frame 1 are changed, and the positions of the threaded cylinders 16 are locked by locking bolts, so that the clamp 18 corresponds to the position of the longitudinal beam or other mounting parts on the chassis.

[0054] Meanwhile, by turning the pressure screw 20, the inner pressure plate 19 is slid on the clamp 18, thereby clamping and fixing the longitudinal beam or other mounting parts through a set of side walls of the inner pressure plate 19 and the clamp 18. At the same time, the use of multiple sets of clamps 18 and inner pressure plates 19 can accommodate the chassis structure of different vehicle models. Furthermore, by rotating the stud 17, the distance between the clamp 18 and the base frame 1 can be changed, so that the base frame 1 can avoid the protruding positions on the chassis, thereby ensuring that the base frame 1 is not limited in installation due to differences in chassis structure.

[0055] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-station automatic vibration and noise testing device for automotive parts, comprising a base frame (1) installed under the vehicle chassis and a sound acquisition module (2) installed on it for collecting vibration and noise, characterized in that: The base frame (1) is equipped with a radio mechanism that drives the sound acquisition module (2) to reciprocate along the laying direction of the base frame (1) in the horizontal direction and the movement stroke is adjustable; The radio mechanism includes a lead screw (3) mounted on a base frame (1) and freely rotating in the vertical direction. The base frame (1) includes an integrally formed frame portion (101) and a base portion (102). The lead screw (3) slides through the frame portion (101) and the base portion (102). The base portion (102) is provided with an orientation component that limits the horizontal position of the lead screw (3). The lead screw (3) is threaded with a co-position seat (4), the sound acquisition module (2) is fixedly connected to the co-position seat (4), the base frame (1) is provided with a spline rod (5) arranged parallel to the lead screw (3), the co-position seat (4) is slidably sleeved on the spline rod (5), the two ends of the spline rod (5) are respectively fixedly connected to the frame part (101) and the stand part (102), and the frame part (101) is provided with a direction-changing component for adjusting the direction of the lead screw (3); The base frame (1) is provided with a self-clamping assembly for mounting to the vehicle chassis.

2. The multi-station automatic vibration and noise testing device for automotive parts according to claim 1, characterized in that: The orientation component includes a positioning cylinder (11) fixedly sleeved on the lead screw (3). The positioning cylinder (11) includes an integrally formed left-side blocking groove (111) and a right-side blocking groove (112). The base part (102) is provided with a pressing pin (12) and has a receiving groove for sliding connection of the pressing pin (12). A return spring (13) is provided in the receiving groove. The two ends of the return spring (13) are fixedly connected to the base part (102) and the pressing pin (12) respectively. The pressure pin (12) slides in contact with the outer peripheral surface of the positioning cylinder (11).

3. The multi-station automatic vibration and noise testing device for automotive parts according to claim 2, characterized in that: The reversing assembly includes a drive bevel gear (6) that rotates on a fixed axis on a frame portion (101) and rotates freely in the vertical direction. A motor for driving the drive bevel gear (6) to rotate is provided on the frame portion (101). The drive bevel gear (6) is meshed with a first driven bevel gear (7) and a second driven bevel gear (8). The first driven bevel gear (7) and the second driven bevel gear (8) are arranged opposite to each other and rotate in opposite directions. Both the first driven bevel gear (7) and the second driven bevel gear (8) rotate on the frame portion (101) with a fixed axis, and both the first driven bevel gear (7) and the second driven bevel gear (8) have a one-way side toothed ring (10) fixed coaxially on their opposite surfaces. The lead screw (3) slides through the first driven bevel gear (7) and the second driven bevel gear (8), and a bidirectional external toothed ring (9) is fixedly sleeved on the lead screw (3). The bidirectional external toothed ring (9) is meshed with two sets of unidirectional side toothed rings (10).

4. The multi-station automatic vibration and noise testing device for automotive parts according to claim 3, characterized in that: The bidirectional external toothed ring (9) is always and simultaneously engaged with only one set of unidirectional side toothed rings (10).

5. The multi-station automatic vibration and noise testing device for automotive parts according to claim 3, characterized in that: The reversing assembly also includes two sets of horizontal plates (14) sleeved on the spline rod (5). The base frame (1) is provided with a groove for the two sets of horizontal plates (14) to slide horizontally. The opposite surfaces of the two sets of horizontal plates (14) are provided with constant pressure springs (15). The constant pressure springs (15) are sleeved on the spline rod (5), and the end of the spline rod (5) is fixedly connected to the horizontal plate (14). The transverse plate (14) is threaded with positioning bolts.

6. The multi-station automatic vibration and noise testing device for automotive parts according to claim 5, characterized in that: The self-clamping assembly includes multiple sets of threaded cylinders (16) arranged on the base frame (1), and the base frame (1) has a groove for the multiple sets of threaded cylinders (16) to slide horizontally. Each of the multiple sets of threaded cylinders (16) is threaded with a stud (17), and a clamp (18) is fixedly connected to the end of the stud (17) away from the threaded cylinder (16). The clamp (18) is provided with an inner pressure plate (19) for clamping the vehicle chassis. The threaded cylinder (16) is threaded with a locking bolt that restricts its horizontal position.

7. The multi-station automatic vibration and noise testing device for automotive parts according to claim 6, characterized in that: The clamp (18) has a rectangular groove for sliding connection of the inner pressure plate (19). The inner pressure plate (19) has a fixed axis rotating pressure screw (20), which is threadedly connected to the clamp (18).

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