A high-precision lamp vibration simulation system and method based on a multi-degree-of-freedom device

Abstract

The present invention discloses a multi-degree-of-freedom device and its high-precision lamp vibration simulation system and method. The system includes: a mounting base, a multi-degree-of-freedom motion mechanism, and a clamping device. The bottom of the mounting base is connected to a vibration working platform, the top of the mounting base is fixedly connected to a rack in the multi-degree-of-freedom motion mechanism through bolts, the inner side of the mounting base cooperates with a slider in the multi-degree-of-freedom motion mechanism, an acceleration sensor is installed at the end of the multi-degree-of-freedom motion mechanism, the clamping device is fixedly connected to the floor of the mounting base through bolts, and the clamping device clamps the cylindrical surface at the end of a linear motor. By controlling the multi-degree-of-freedom motion mechanism, the present invention can achieve translational and rotational motions in the X, Y, and Z directions of the coordinate system, and can accurately simulate the installation angle of the lamp assembly after being installed on a vehicle. The acceleration sensor is used to detect the resonance frequency of the present invention. The present invention can accurately simulate the installation position and angle of the lamp after being installed on a vehicle, ensuring the reliability of the present invention.

Description

Technical Field

[0001] The present invention relates to the field of automotive lamp detection, and particularly to a high-precision lamp vibration simulation system and method based on a multi-degree-of-freedom device. Background Art

[0002] Automotive lamps are an important part of a vehicle. As an important component affecting driving safety, the reliability requirements for automotive lamps are getting higher and higher. During transportation and use, automotive lamps are subject to severe jitters and instantaneous impacts, and the lamps are vibrated at different amplitudes. These vibrations pose a great threat to the installation structure strength of the lamps and the assembly method of the internal parts of the lamps. Therefore, conducting vibration tests on automotive lamps is an extremely important item in the lamp reliability test project. We need to simulate and evaluate the reliability of the installation structure strength of automotive lamps and the assembly method of the internal parts of the lamps through vibration tests.

[0003] Currently, the vibration test tooling for automotive lamps is inconvenient to disassemble and takes up a large amount of space when stored; each lamp has a corresponding vibration tooling, and for each project, a corresponding vibration test tooling needs to be developed again. Moreover, the manufacturing cost is high, the cycle is long, and it does not have universality. Summary of the Invention

[0004] To solve the defects existing in the above-mentioned prior art, the present invention proposes a high-precision lamp vibration simulation system and method based on a multi-degree-of-freedom device. The present invention can realize vibration simulation tests for different types of automotive lamps, without the need for each lamp to have a corresponding vibration tooling, and can have wide applicability.

[0005] The present invention proposes a multi-degree-of-freedom device for high-precision lamp vibration simulation, which performs translational and rotational motions of X, Y, and Z along the motion axis. It includes a straight-tooth rack, a straight-tooth gear, a linear motor rod, a first motor, an intermediate gear, a shaft, a guide rod, a bracket, a nut slider, a support rod, a transmission screw, and a second motor. Among them, the guide rod, the first motor, and the bracket are fixedly connected to the support rod. The straight-tooth gear is respectively assembled with the motor and the shaft. The bracket is assembled with the shaft through a bearing. The shaft is assembled with the straight-tooth gear. The transmission screw is assembled with the support rod through a bearing. The motor is fixedly connected to the support rod. The motor is connected to the transmission screw through a key. The motor is installed inside the nut slider and is in interference fit with the upper end of the linear motor rod (13).

[0006] The present invention discloses a high-precision lamp vibration simulation system based on a multi-degree-of-freedom device. The system includes: a multi-degree-of-freedom motion mechanism and a clamping device, where:

[0007] The clamping device is used to clamp the end of the linear motor rod in the multi-axis degree-of-freedom motion mechanism. It includes an adjustment block and a chuck. The adjustment block is provided with two waist-shaped holes through which bolts can be connected to the threaded holes on the mounting base plate. The adjustment block is also provided with four internal threaded holes. The chuck is provided with two waist-shaped holes through which bolts can be connected to the threaded holes on the adjustment block. One side of the chuck is serrated, which is used to clamp the end of the linear motor rod to ensure reliable stability of the linear motor rod.

[0008] Furthermore, a motor is installed inside the linear motor slider and is press-fitted with the adapter. The adapter is fixedly connected to the motor, the motor is fixedly connected to the telescopic rod, the telescopic rod is fixedly connected to the fixed joint, and the acceleration sensor is installed on the fixed joint.

[0009] Furthermore, it also includes a mounting base which is the foundation of the entire vibration simulation system. The mounting base includes a mounting base plate, a slide rail cover plate, a mounting block, and a right-angled triangular rib plate. Among them, the mounting base plate is connected to the mounting block by bolts, the slide rail cover plate is connected to the mounting block by bolts, and the right-angled surface of the right-angled triangular rib plate is connected to the upper surface of the mounting base plate and the bottom surface of the mounting block by bolts respectively, making the mounting base a stable whole.

[0010] The mounting base plate and the mounting block are respectively provided with corresponding counterbores and threaded holes for connection.

[0011] The periphery of the mounting base plate is provided with multiple rows of through holes for connecting with the mounting connection platform to fix the entire vibration simulation system. The mounting base plate is provided with multiple rows of internal threaded holes in the middle area of the mounting block for connecting with the clamping device.

[0012] Furthermore, one side of the chuck in the clamping device is serrated. Such a design structure can ensure the stability of clamping.

[0013] Furthermore, the type of the fixed joint can be selected according to requirements.

[0014] The present invention proposes a vibration simulation method.

[0015] Step 1: According to the spatial coordinates of the lamp assembly installed on the vehicle, adjust the spatial coordinates of the fixed joint in the multi-degree-of-freedom motion mechanism so that the spatial coordinate positions of the fixed joints in the multi-degree-of-freedom motion mechanism correspond one by one to the spatial coordinates of the mounting holes of the lamp assembly on the vehicle.

[0016] Step 2: Place the lamp assembly at the fixed joint in the multi-degree-of-freedom motion mechanism and fixedly connect the lamp assembly and the fixed joint (7) by bolts.

[0017] Step 3: Then, fix the lamp assembly on the vibration test bench for vibration testing.

[0018] The present invention provides a high-precision lamp vibration simulation system to solve the problems of repeated design, long development cycle, and high cost of the vibration tooling for automotive lamp assemblies. The test lamp is conveniently clamped in the present invention. The present invention can accurately simulate the installation position and angle of the lamp after being installed on the vehicle, ensuring the reliability of the present invention. Brief Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is a schematic structural diagram of the installation base in the present invention;

[0021] Figure 3 is a schematic structural diagram of the multi-degree-of-freedom motion mechanism in the present invention;

[0022] Figure 4 is a schematic structural diagram of the clamping device in the present invention.

[0023] Figure 5 is a schematic structural diagram of the usage state of the present invention.

[0024] In the figure: 1 installation base plate, 2 slide rail cover plate, 3 installation block, 4 right-angled triangular rib plate, 5 straight-toothed rack, 6 straight-toothed gear, 7 fixed joint, 8 acceleration sensor, 9 telescopic rod, 10 motor, 11 conversion joint, 12 linear motor slider, 13 linear motor rod, 14 first motor, 15 intermediate gear, 16 shaft, 17 guide rod, 18 bracket, 19 nut slider, 20 support rod, 21 transmission screw, 22 second motor, 23 adjustment block, 24 chuck, 25 lamp assembly. Detailed Description of the Preferred Embodiments

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] Figure 1 is a schematic structural diagram of a high-precision lamp vibration simulation system of the present invention, as Figure 1 shown, the vibration simulation system includes: an installation base, a multi-axis degree-of-freedom motion mechanism, and a clamping device, wherein:

[0027] Figure 2 is a schematic structural diagram of the installation base in the present invention, as Figure 2As shown, the installation base is the foundation of the entire vibration simulation system. The installation base includes an installation bottom plate 1, a slide rail cover plate 2, an installation block 3, and a right-angled triangular rib plate 4. Among them, the installation bottom plate 1 is bolted to the installation block 3, the slide rail cover plate 2 is bolted to the installation block 3, and the right-angled surface of the right-angled triangular rib plate 4 is bolted to the upper surface of the installation bottom plate 1 and the side surface of the installation block 3 respectively, making the installation base a stable whole;

[0028] The installation bottom plate 1 and the installation block 3 are provided with holes for connecting external devices;

[0029] The installation bottom plate 1 is provided with multiple rows of through holes around its perimeter for connecting to an installation connection platform to fix the entire vibration simulation system; the installation bottom plate 1 is provided with an internal threaded hole in the middle of the installation block 3 for connecting to the clamping device;

[0030] Figure 3 is a schematic structural diagram of the multi-degree-of-freedom motion mechanism in the present invention. As Figure 3 shown, the multi-degree-of-freedom motion mechanism is used for translational and rotational motions with different degrees of freedom along the motion axis. It includes a straight tooth rack 5, a straight tooth gear 6, a fixed joint 7, an acceleration sensor 8, a telescopic rod 9, a motor 10, a conversion joint 11, a linear motor slider 12, a linear motor rod 13, a first motor 14, an intermediate gear 15, a shaft 16, a guide rod 17, a bracket 18, a nut slider 19, a support rod 20, a transmission screw 21, and a second motor 22. Among them, the straight tooth rack 5 is installed on the installation block 3, the guide rod 17 is fixedly connected to the support rod 20, the first motor 14 is fixedly connected to the support rod 20, the bracket 18 is fixedly connected to the support rod 20, the two intermediate gears 15 are respectively assembled with the first motor 14 and the shaft 16, the bracket 18 is assembled with the shaft 16 through a bearing, the shaft 16 is assembled with the straight tooth gear 6, the transmission screw 21 is assembled with the support rod 20 through a bearing, the second motor 22 is fixedly connected to the support rod 20, the second motor 22 is key-connected to the transmission screw 21, a motor is installed inside the nut slider 19 and is press-fitted with the upper end of the linear motor rod 13, a motor is installed inside the linear motor slider 12 and is press-fitted with the conversion joint 11, the conversion joint 11 is fixedly connected to the motor 10, the motor 10 is fixedly connected to the telescopic rod 9, the telescopic rod 9 is fixedly connected to the fixed joint 7, and the acceleration sensor 8 is installed on the fixed joint 7;

[0031] Figure 4 is a schematic structural diagram of the clamping device in the present invention. As Figure 4As shown, the clamping device is used to clamp the end of the linear motor rod 13 in the multi-axis degree-of-freedom motion mechanism. It includes an adjustment block 23 and a chuck 24. The adjustment block 23 is provided with two waist-shaped holes, and bolts can be connected to the threaded holes on the mounting base plate 1 through the waist-shaped holes. The adjustment block 23 is also provided with four internal threaded holes; the chuck 24 is provided with two waist-shaped holes, and bolts can be connected to the threaded holes on the adjustment block 23 through the waist-shaped holes. One side of the chuck 24 is serrated, which is used to clamp the end of the linear motor rod 13 to ensure reliable stability of the linear motor rod 13.

[0032] When installing the vibration simulation system:

[0033] First, connect the mounting base plate 1, the mounting block 3, and the right-angled triangular rib plate 4 of the mounting base into a whole through bolts.

[0034] Then, assemble the multi-degree-of-freedom motion mechanism with the mounting base, and lock the slide rail cover plate 2 on the mounting block 3.

[0035] Finally, connect the clamping device to the mounting base through screws. The clamping device clamps the end of the linear motor rod 13 in the multi-degree-of-freedom motion mechanism, thus constituting the vibration simulation system.

[0036] Figure 5 is a structural schematic diagram of the use state of the present invention. As Figure 5 shown, this system includes a set of mounting bases A, four sets of multi-axis degree-of-freedom motion mechanisms B1, B2, B3, B4, and four sets of clamping devices C1, C2, C3, C4 for combined use. When using the present invention, according to the spatial coordinates of the lamp assembly 25 installed on the vehicle, adjust the spatial coordinates of the fixed joints 7 in the multi-degree-of-freedom motion mechanisms B1, B2, B3, B4 of the present invention, so that the spatial coordinate positions of the fixed joints 7 in the multi-degree-of-freedom motion mechanisms B1, B2, B3, B4 respectively correspond one-to-one to the spatial coordinates of the lamp assembly 25 installed on the vehicle. Place the lamp assembly 25 at the fixed joints 7 in the multi-degree-of-freedom motion mechanisms B1, B2, B3, B4, and fixedly connect the lamp assembly 25 and the fixed joints 7 through bolts. Then, fix the present invention equipped with the lamp assembly 25 on a vibration test bench for vibration testing. The present invention can well simulate the vibration conditions of the lamp assembly after being installed on the vehicle.

[0037] The present invention provides a high-precision lamp vibration simulation system to solve the problems of repeated design, long development cycle, and high cost of the vibration tooling for automotive lamp assemblies. The test lamps are conveniently clamped in the present invention. The present invention can accurately simulate the installation position and angle of the lamps after being installed on the vehicle, ensuring the reliability of the present invention.

Claims

1. A multi-degree-of-freedom device for high-precision vibration simulation of lamps, characterized in that: Perform translational and rotational motions of X, Y, and Z along the motion axis, which includes a straight tooth rack (5), a spur gear (6), a fixed joint (7), an acceleration sensor (8), a telescopic rod (9), a motor (10), a conversion joint (11), a linear motor slider (12), a linear motor rod (13), a first motor (14), an intermediate gear (15), a shaft (16), a guide rod (17), a bracket (18), a nut slider (19), a support rod (20), a transmission screw (21), a second motor (22). Among them, the straight tooth rack (5) is installed on the mounting block (3) in the mounting base included in the lamp vibration simulation system. The guide rod (17), the first motor (14), the bracket (18) are fixedly connected to the support rod (20). The guide rod (17) is slidably arranged in the slide rail parallel to the straight tooth rack (5) on the mounting block (3). The intermediate gear (15) is respectively assembled with the first motor (14) and the shaft (16). The bracket (18) is assembled with the shaft (16) through a bearing. The shaft (16) is assembled with the spur gear (6). The spur gear (6) meshes with the straight tooth rack (5). The transmission screw (21) is assembled with the support rod (20) through a bearing. The transmission screw (21) and the straight tooth rack (5) are perpendicular to each other. The second motor (22) is fixedly connected to the support rod (20). The second motor (22) is connected to the transmission screw (21) by a key. The nut slider (19) is threadedly connected to the transmission screw (21). A motor is installed inside the nut slider (19); the nut slider (19) is in interference fit with the upper end of the linear motor rod (13); the linear motor slider (12) is arranged on the linear motor rod (13). A motor is installed inside the linear motor slider (12). The linear motor slider (12) is in interference fit with the conversion joint (11). The conversion joint (11) is fixedly connected to the third motor (10). The third motor (10) is fixedly connected to the telescopic rod (9). The telescopic rod (9) is fixedly connected to the fixed joint (7). The acceleration sensor (8) is installed on the fixed joint (7).

2. A high-precision lamp vibration simulation system based on a multi-degree-of-freedom device, characterized in that The system includes: a multi-degree-of-freedom motion mechanism and a clamping device. The multi-degree-of-freedom motion mechanism is used for translational and rotational motions with different degrees of freedom along the motion axis, and it includes a straight tooth rack (5), a straight tooth gear (6), a fixed joint (7), an acceleration sensor (8), a telescopic rod (9), a motor (10), a conversion joint (11), a linear motor slider (12), a linear motor rod (13), a first motor (14), an intermediate gear (15), a shaft (16), a guide rod (17), a bracket (18), a nut slider (19), a support rod (20), a transmission screw (21), and a second motor (22). Among them, the straight tooth rack (5) is installed on the mounting block (3) in the mounting base included in the lamp vibration simulation system. The guide rod (17), the first motor (14), and the bracket (18) are fixedly connected to the support rod (20). The guide rod (17) is slidably arranged in the slide rail parallel to the straight tooth rack (5) on the mounting block (3). The intermediate gear (15) is respectively assembled with the first motor (14) and the shaft (16). The bracket (18) is assembled with the shaft (16) through a bearing. The shaft (16) is assembled with the straight tooth gear (6). The straight tooth gear (6) meshes with the straight tooth rack (5). The transmission screw (21) is assembled with the support rod (20) through a bearing. The transmission screw (21) and the straight tooth rack (5) are perpendicular to each other. The second motor (22) is fixedly connected to the support rod (20). The second motor (22) is connected to the transmission screw (21) by a key. The nut slider (19) is threadedly connected to the transmission screw (21). A motor is installed inside the nut slider (19); the nut slider (19) is press-fitted with the upper end of the linear motor rod (13); the linear motor slider (12) is arranged on the linear motor rod (13). A motor is installed inside the linear motor slider (12). The linear motor slider (12) is press-fitted with the conversion joint (11). The conversion joint (11) is fixedly connected to the third motor (10). The third motor (10) is fixedly connected to the telescopic rod (9). The telescopic rod (9) is fixedly connected to the fixed joint (7). The acceleration sensor (8) is installed on the fixed joint (7); where: The clamping device is used to clamp the end of the linear motor rod (13) in the multi-degree-of-freedom motion mechanism, and it includes an adjustment block (23) and a chuck (24). The adjustment block (23) is provided with 2 waist-shaped holes, and bolts can be connected to the threaded holes on the mounting base plate (1) through the waist-shaped holes. The adjustment block (23) is also provided with four internal threaded holes; the chuck (24) is provided with 2 waist-shaped holes, and bolts can be connected to the threaded holes on the adjustment block (23) through the waist-shaped holes. One side of the chuck (24) is serrated, which is used to clamp the end of the linear motor rod (13) to ensure reliable stability of the linear motor rod (13).

3. The high-precision lamp vibration simulation system based on a multi-degree-of-freedom device according to claim 2, characterized in that: It further includes an installation base, and the installation base includes an installation bottom plate (1), a slide rail cover plate (2), an installation block (3) and a right-angled triangular rib plate (4). Among them, the installation bottom plate (1) is bolted to the installation block (3), the slide rail cover plate (2) is bolted to the installation block (3), and the right-angled surface of the right-angled triangular rib plate (4) is bolted to the upper surface of the installation bottom plate (1) and the side surface of the installation block (3) respectively, so that the installation base becomes a stable whole; The installation bottom plate (1) and the installation block (3) are respectively provided with corresponding counterbores and threaded holes; The installation bottom plate (1) is provided with multiple rows of through holes around it for connecting with the installation connection platform to fix the entire vibration simulation system; the installation bottom plate (1) is provided with multiple rows of internal threaded holes in the middle area of the installation block (3) for connecting with the clamping device.

4. The high-precision lamp vibration simulation system based on a multi-degree-of-freedom device according to claim 2, wherein The type of the fixed joint (7) can be selected according to requirements.

5. A vibration simulation method for a system as claimed in claim 2, characterized in that, Step 1: According to the spatial coordinates of the lamp assembly installed on the vehicle, adjust the spatial coordinates of the fixed joint (7) in the multi-degree-of-freedom motion mechanism so that the spatial coordinate positions of the fixed joint (7) in the multi-degree-of-freedom motion mechanism correspond one by one to the spatial coordinates of the mounting holes of the lamp assembly on the vehicle; Step 2: Place the lamp assembly at the fixed joint (7) in the multi-degree-of-freedom motion mechanism, and fixedly connect the lamp assembly and the fixed joint (7) with bolts; Step 3: Fix the device equipped with the lamp assembly on the vibration test bench for vibration testing.

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