Sensor clamping jaw capable of conducting noise, vibration and roughness

Abstract

The utility model discloses a sensor clamping jaw capable of conducting noise, vibration and roughness, which comprises a clamping jaw main body, the clamping jaw main body comprises a main clamp and an auxiliary clamp, and the main clamp and the auxiliary clamp are connected through a rotating shaft; the main clamp and the auxiliary clamp comprise a clamping jaw long arm and a driving short arm, one end, far away from the rotating shaft, of the clamping jaw long arm is provided with an attaching part, the attaching part is tightly attached to a to-be-measured object in a clamping state, and the driving short arm is connected with a driving air cylinder; a sensor is arranged on a clamping jaw long arm of the main shaft; nVH signals of an object to be detected are transmitted to the sensor through the attaching part and the clamping jaw body, and then the signals are transmitted to the upper computer through the sensor to be analyzed so that NVH detection can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile manufacturing, in particular to a sensor clamp capable of conducting noise, vibration and roughness. Background Art

[0002] Noise, vibration, and harshness are comprehensive measures of automotive manufacturing quality. NVH testing addresses issues such as the strength and lifespan of automotive components caused by vibration. NVH is a key indicator of vehicle manufacturing quality during the manufacturing process, and NVH testing is frequently required. Existing NVH testing processes, to enhance driving comfort and passenger experience, improve the noise, vibration, and harshness (NVH) performance of the electric power steering unit (EPP) in the vehicle's power steering system (EPS), and increase NVH testing accuracy, require targeted sensor tooling design.

[0003] The prior art patent with the invention publication number CN109708885A discloses a clamp for clamping a calibrator in contact with an NVH sensor, comprising a frame (1), a top plate (2), a lifting plate (3), a bottom plate (4), a tail top knob (5), and a clamping bolt (6). The present invention adopts a method of fixing a test bench probe to the device by tightening the four clamping bolts centripetally; then, the calibrator is placed on the lifting plate, the contact on the calibrator is aligned with the NVH sensor below the test bench probe, the tail top knob is rotated to push the lifting plate to drive the calibrator upward, so that the contact of the calibrator is firmly and stably in contact with the NVH sensor; then, the calibrator is started, the calibration interface is opened on the computer, data is collected, and the calibration result is executed; by making the calibrator firmly and stably in contact with the NVH sensor and avoiding the disadvantages of operating a handheld calibrator, the calibration work of the NVH sensor of the transmission test bench achieves the purpose of eliminating data errors, reducing labor occupation, and reducing labor costs. Utility Model Content

[0004] In the existing NVH testing process, the calibration method of the existing technology is operated by two people, that is, one person holds the calibrator and contacts the NVH sensor with the contacts of the calibrator, and the other person opens the calibration interface on the computer to collect data and execute the calibration results. The human factor has a great influence on this method. The stability of the human hand-held contact will cause uncertainty errors in the calibrated data, resulting in differences in the data of each calibration. Therefore, the existing technology has problems and shortcomings such as large data errors, high labor costs and high labor costs.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a sensor clamp that can conduct noise, vibration and roughness, including a clamp body, the clamp body includes a main clamp and a secondary clamp, the main clamp and the secondary clamp are connected by a rotating shaft; the main clamp and the secondary clamp include a clamp long arm and a driving short arm, the clamp long arm is provided with a fitting component at one end away from the rotating shaft, the fitting component is tightly fitted with the object to be measured in the clamping state, and the driving short arm is connected to the driving cylinder; a sensor is provided on the clamp long arm of the main shaft. In the clamping state, the NVH signal of the object to be measured is transmitted to the sensor through the fitting component and the clamp body, and the signal is transmitted to the host computer for analysis to realize NVH detection. The error in the vibration transmission process is reduced by clamping the object to be measured with the clamp and the fitting component, which is more stable than manual contact. The clamp body is in a suspended state during the clamping process, which can eliminate external interference.

[0006] As a further improvement of the present invention, the driving cylinder includes a cylinder body, on which a transmission connection structure is provided, and the transmission connection structure is connected to the driving short arm of the clamping jaw body through a driving assembly.

[0007] As a further improvement of the present invention, the driving assembly includes two driving blocks with the same structure, the driving blocks are connected to the two driving short arms of the clamp body, and a curved convex structure is provided on the side of the driving block close to the driving short arm.

[0008] As a further improvement of the present invention, the long arm of the clamping jaw of the main clamp is arc-shaped, the driving short arm of the main clamp and the driving short arm of the auxiliary clamp are connected by a spring, and a transmission block is provided on the side of the driving short arm away from the spring; the spring provides clamping force to the main clamp and the auxiliary clamp, and the driving assembly controls the opening and closing of the clamping jaws.

[0009] As a further improvement of the present invention, the long arm of the clamping jaw of the auxiliary clamp is arc-shaped and shorter than the long arm of the clamping jaw of the main clamp. In the clamping state, the fitting positions of the fitting parts on the long arms of the clamping jaws of the main clamp and the auxiliary clamp are asymmetrical with the object to be tested, and vibration signals at different angles are collected. The asymmetric vibration signal collection can more comprehensively analyze the NVH performance of the object to be tested.

[0010] As a further improvement of the present invention, the transmission block is connected to the driving block of the driving assembly, and an arc-shaped recessed groove corresponding to the arc-shaped convex structure on the driving block is provided at the connection between the transmission block and the driving block; the transmission block and the driving block connected by the arc-shaped groove can be more accurately docked and positioned during the installation process, and at the same time, the vibration interference of the driving assembly on the clamping claw body can be reduced during use.

[0011] As a further improvement of the present invention, a large fitting component is provided at one end of the long arm of the main clamp's clamp near the rotating shaft. The large fitting component is a rectangular structure, and two opposite semicircular grooves are provided on the fitting surface of the rectangular structure and the object to be measured.

[0012] As a further improvement of the present invention, the fitting component is a square structure, and two semicircular grooves tangent to each other are provided on the fitting surface of the square structure and the object to be measured; the groove design can more conveniently collect vibration signals.

[0013] The beneficial effects of the present invention are as follows: the main body of the clamp adopts an arc-shaped design, which can fit tightly on the workpiece to ensure the effectiveness of vibration transmission. At the same time, when collecting noise, vibration and harshness (NVH) signals, the main body of the clamp is in a suspended state, eliminating external interference such as human contact factors. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the main structure diagram of the clamping jaw of this utility model.

[0015] Figure 2 This is the structural diagram of the driving cylinder of the utility model.

[0016] In the figure, 1 is the main clamp, 2 is the auxiliary clamp, 3 is the long arm of the clamp, 4 is the driving short arm, 5 is the fitting part, 6 is the rotating shaft, 7 is the sensor, 8 is the large fitting part, 9 is the transmission block, 10 is the cylinder body, 11 is the transmission connection structure, and 12 is the driving block. DETAILED DESCRIPTION

[0017] Embodiment 1: A sensor 7 that can transmit noise, vibration and roughness comprises a clamp body, the clamp body comprises a main clamp 1 and an auxiliary clamp 2, the main clamp 1 and the auxiliary clamp 2 are connected by a rotating shaft 6; the main clamp 1 and the auxiliary clamp 2 comprise a clamp long arm 3 and a driving short arm 4, the clamp long arm 3 is provided with a fitting component 5 at one end away from the rotating shaft 6, the fitting component 5 is tightly fitted with the object to be measured in the clamping state, and the driving short arm 4 is connected to the driving cylinder; a sensor 7 is provided on the clamp long arm 3 of the main shaft. In the clamping state, the NVH signal of the object to be measured is transmitted to the sensor 7 through the fitting component 5 and the clamp body, and the signal is then transmitted to the host computer for analysis to realize NVH detection through the sensor 7. The clamping and fitting of the object to be measured by the clamp and the fitting component 5 reduces the error in the vibration transmission process, which is more stable than manual contact. The clamp body is in a suspended state during the clamping process, which can eliminate external interference.

[0018] NVH stands for Noise, Vibration, and Harshness. It's a comprehensive measure of automotive manufacturing quality, and it's the most direct and visible aspect experienced by car owners. NVH is a major concern for major vehicle manufacturers and parts manufacturers in the international automotive industry. Statistics show that approximately one-third of vehicle failures are related to NVH, and nearly 20% of major companies' R&D budgets are spent on addressing NVH issues.

[0019] The study of NVH applies not only to automobiles but also to aircraft, ships, trains, various electrical appliances, and construction machinery. These products all generate noise, vibration, and harshness during use. Therefore, NVH research has attracted considerable attention across various industries.

[0020] Research into automotive NVH characteristics isn't just about improving ride comfort; it's also about addressing the strength and lifespan of automotive components caused by vibration. For example, excessive stress on transmission and suspension components can reduce reliability; structural vibration fatigue can reduce the fatigue life of the vehicle structure; and excessive interior noise can cause discomfort and irritation for passengers, even impacting vehicle safety.

[0021] To improve the NVH characteristics of a car, automakers usually start with the noise sources (engine, exhaust system, transmission system, cooling fan, etc.), study and control the noise propagation paths (air noise, solid noise propagation), and the reactions of the noise and vibration receivers (drivers, passengers).

[0022] In short, NVH is an important indicator to measure the manufacturing quality of an automobile, and is of great significance to improving the performance, ride comfort and reliability of the automobile.

[0023] During the automotive manufacturing process, NVH (noise, vibration, and harshness) (NVH) testing is a key indicator of vehicle quality, and products often require NVH testing. The existing NVH testing process requires two people to perform calibration: one person holds a calibrator and places its contacts in contact with the NVH sensor 7, while the other person opens the calibration interface on a computer, collects data, and verifies the calibration results. This method is significantly affected by human factors, as the stability of the hand's contact can introduce uncertainty into the calibrated data, resulting in discrepancies between calibrations. Consequently, existing technology suffers from significant data errors, high labor costs, and other shortcomings. To enhance driving comfort and passenger experience, improving the noise, vibration, and harshness (NVH) performance of the electric power assist unit (EPP) in the vehicle's power steering system (EPS) and increasing NVH detection accuracy requires targeted design of the sensor 7 tooling.

[0024] The clamping jaw body of this embodiment adopts an arc-shaped design, which can fit tightly on the workpiece under test to ensure the effectiveness of vibration transmission. At the same time, when collecting noise, vibration and harshness (NVH) signals, the clamping jaw body is in a suspended state, eliminating external interference such as human contact factors.

[0025] As a further improvement of the present invention, the driving cylinder includes a cylinder body 10 , on which a transmission connection structure 11 is provided. The transmission connection structure 11 is connected to the driving short arm 4 of the clamping jaw body through a driving assembly.

[0026] As a further improvement of the present invention, the driving assembly includes two driving blocks 12 with the same structure. The driving blocks 12 are connected to the two driving short arms 4 of the clamp body. A curved convex structure is provided on the side of the driving block 12 close to the driving short arm 4.

[0027] As a further improvement of the present invention, the long arm 3 of the clamping jaw of the main clamp 1 is arc-shaped, the driving short arm 4 of the main clamp 1 and the driving short arm 4 of the auxiliary clamp 2 are connected by a spring, and a transmission block 9 is provided on the side of the driving short arm 4 away from the spring; the spring provides clamping force to the main clamp 1 and the auxiliary clamp 2, and the driving assembly controls the opening and closing of the clamping jaws.

[0028] As a further improvement of the present invention, the long arm 3 of the clamping jaw of the auxiliary clamp 2 is arc-shaped and shorter than the long arm 3 of the clamping jaw of the main clamp 1. In the clamping state, the fitting position of the fitting part 5 on the long arm 3 of the clamping jaw of the main clamp 1 and the auxiliary clamp 2 is asymmetrical with the object to be tested, and vibration signals at different angles are collected. The asymmetric vibration signal collection can more comprehensively analyze the NVH performance of the object to be tested.

[0029] As a further improvement of the present invention, the transmission block 9 is connected to the driving block 12 of the driving assembly, and an arc-surface recessed groove corresponding to the arc-surface convex structure on the driving block 12 is provided at the connection between the transmission block 9 and the driving block 12; the transmission block 9 and the driving block 12 connected by the arc-surface groove can be more accurately docked and positioned during the installation process, and at the same time, the vibration interference of the driving assembly on the clamping claw body can be reduced during use.

[0030] As a further improvement of the present invention, a large fitting component 8 is provided at one end of the long arm 3 of the clamp 1 near the rotating shaft 6. The large fitting component 8 is a rectangular structure, and two opposite semicircular grooves are provided on the fitting surface of the rectangular structure and the object to be measured.

[0031] As a further improvement of the present invention, the fitting component 5 is a square structure, and two semicircular grooves tangent to each other are provided on the fitting surface of the square structure and the object to be measured; the groove design can more conveniently collect vibration signals.

[0032] During use, the driving cylinder contracts and the driving block 12 pushes the transmission block 9 through the transmission connection structure 11. The transmission block 9 pushes the driving short arm 4, and the main clamp 1 and the auxiliary clamp 2 rotate around the rotating shaft 6 to expand the clamp body. When the object to be measured is placed in the clamp body, the driving cylinder is released, and the spring pushes the driving short arm 4, so that the main clamp 1 and the auxiliary clamp 2 rotate and close around the rotating shaft 6 to enter the clamping state. The fitting component 5 is close to the object to be measured to collect and transmit vibration signals.

[0033] Embodiment 2: A sensor 7 that can transmit noise, vibration and roughness comprises a clamp body, the clamp body comprises a main clamp 1 and an auxiliary clamp 2, the main clamp 1 and the auxiliary clamp 2 are connected by a rotating shaft 6; the main clamp 1 and the auxiliary clamp 2 comprise a clamp long arm 3 and a driving short arm 4, the clamp long arm 3 is provided with a fitting component 5 at one end away from the rotating shaft 6, the fitting component 5 is tightly fitted with the object to be measured in the clamping state, and the driving short arm 4 is connected to the driving cylinder; a sensor 7 is provided on the clamp long arm 3 of the main shaft. In the clamping state, the NVH signal of the object to be measured is transmitted to the sensor 7 through the fitting component 5 and the clamp body, and the signal is then transmitted to the host computer for analysis to realize NVH detection through the sensor 7. The clamping and fitting of the object to be measured by the clamp and the fitting component 5 reduces the error in the vibration transmission process, which is more stable than manual contact. The clamp body is in a suspended state during the clamping process, which can eliminate external interference.

[0034] NVH stands for Noise, Vibration, and Harshness. It's a comprehensive measure of automotive manufacturing quality, and it's the most direct and visible aspect experienced by car owners. NVH is a major concern for major vehicle manufacturers and parts manufacturers in the international automotive industry. Statistics show that approximately one-third of vehicle failures are related to NVH, and nearly 20% of major companies' R&D budgets are spent on addressing NVH issues.

[0035] The study of NVH applies not only to automobiles but also to aircraft, ships, trains, various electrical appliances, and construction machinery. These products all generate noise, vibration, and harshness during use. Therefore, NVH research has attracted considerable attention across various industries.

[0036] Research into automotive NVH characteristics isn't just about improving ride comfort; it's also about addressing the strength and lifespan of automotive components caused by vibration. For example, excessive stress on transmission and suspension components can reduce reliability; structural vibration fatigue can reduce the fatigue life of the vehicle structure; and excessive interior noise can cause discomfort and irritation for passengers, even impacting vehicle safety.

[0037] To improve the NVH characteristics of a car, automakers usually start with the noise sources (engine, exhaust system, transmission system, cooling fan, etc.), study and control the noise propagation paths (air noise, solid noise propagation), and the reactions of the noise and vibration receivers (drivers, passengers).

[0038] In short, NVH is an important indicator to measure the manufacturing quality of an automobile, and is of great significance to improving the performance, ride comfort and reliability of the automobile.

[0039] During the automotive manufacturing process, NVH (noise, vibration, and harshness) (NVH) testing is a key indicator of vehicle quality, and products often require NVH testing. The existing NVH testing process requires two people to perform calibration: one person holds a calibrator and places its contacts in contact with the NVH sensor 7, while the other person opens the calibration interface on a computer, collects data, and verifies the calibration results. This method is significantly affected by human factors, as the stability of the hand's contact can introduce uncertainty into the calibrated data, resulting in discrepancies between calibrations. Consequently, existing technology suffers from significant data errors, high labor costs, and other shortcomings. To enhance driving comfort and passenger experience, improving the noise, vibration, and harshness (NVH) performance of the electric power assist unit (EPP) in the vehicle's power steering system (EPS) and increasing NVH detection accuracy requires targeted design of the sensor 7 tooling.

[0040] As a further improvement of the present invention, the driving cylinder includes a cylinder body 10 , on which a transmission connection structure 11 is provided. The transmission connection structure 11 is connected to the driving short arm 4 of the clamping jaw body through a driving assembly.

[0041] As a further improvement of the present invention, the driving assembly includes two driving blocks 12 with the same structure. The driving blocks 12 are connected to the two driving short arms 4 of the clamp body. A curved convex structure is provided on the side of the driving block 12 close to the driving short arm 4.

[0042] As a further improvement of the present invention, the long arm 3 of the clamping jaw of the main clamp 1 is arc-shaped, the driving short arm 4 of the main clamp 1 and the driving short arm 4 of the auxiliary clamp 2 are connected by a spring, and a transmission block 9 is provided on the side of the driving short arm 4 away from the spring; the spring provides clamping force to the main clamp 1 and the auxiliary clamp 2, and the driving assembly controls the opening and closing of the clamping jaws.

[0043] As a further improvement of the present invention, the long arm 3 of the clamping jaw of the auxiliary clamp 2 is arc-shaped and shorter than the long arm 3 of the clamping jaw of the main clamp 1. In the clamping state, the fitting position of the fitting part 5 on the long arm 3 of the clamping jaw of the main clamp 1 and the auxiliary clamp 2 is asymmetrical with the object to be tested, and vibration signals at different angles are collected. The asymmetric vibration signal collection can more comprehensively analyze the NVH performance of the object to be tested.

[0044] As a further improvement of the present invention, the transmission block 9 is connected to the driving block 12 of the driving assembly, and an arc-surface recessed groove corresponding to the arc-surface convex structure on the driving block 12 is provided at the connection between the transmission block 9 and the driving block 12; the transmission block 9 and the driving block 12 connected by the arc-surface groove can be more accurately docked and positioned during the installation process, and at the same time, the vibration interference of the driving assembly on the clamping claw body can be reduced during use.

[0045] As a further improvement of the present invention, a large fitting component 8 is provided at one end of the long arm 3 of the clamp 1 close to the rotating shaft 6. The large fitting component 8 is a rectangular structure, and two opposite semicircular grooves are provided on the fitting surface of the rectangular structure and the object to be measured.

[0046] As a further improvement of the present invention, the fitting component 5 is a square structure, and two semicircular grooves tangent to each other are provided on the fitting surface of the square structure and the object to be measured; the groove design can more conveniently collect vibration signals.

[0047] During use, the driving cylinder contracts and the driving block 12 pushes the transmission block 9 through the transmission connection structure 11. The transmission block 9 pushes the driving short arm 4, and the main clamp 1 and the auxiliary clamp 2 rotate around the rotating shaft 6 to expand the clamp body. When the object to be measured is placed in the clamp body, the driving cylinder is released, and the spring pushes the driving short arm 4, so that the main clamp 1 and the auxiliary clamp 2 rotate and close around the rotating shaft 6 to enter the clamping state. The fitting component 5 is close to the object to be measured to collect and transmit vibration signals.

[0048] The gripper body of this embodiment is made of a composite material of PA10+Carbon Fiber. This material not only retains the excellent mechanical properties and friction resistance of traditional nylon, but also the carbon fiber material has the characteristics of high modulus and high strength, is relatively sensitive to vibration, and can effectively transmit vibration.

[0049] The above specific embodiments are merely preferred embodiments of the present invention and are not intended to limit the specific implementation structure and scope of the present invention. In fact, equivalent variations can be made based on the shape, structure, and design purpose of the present invention. Therefore, all equivalent variations made based on the shape, structure, and design purpose of the present invention should be included in the scope of protection of the present invention and should be protected by the present invention.

Claims

1. A sensor gripper capable of conducting noise, vibration and roughness, characterized in that: It includes a clamp body, which includes a main clamp and an auxiliary clamp, and the main clamp and the auxiliary clamp are connected by a rotating shaft; the main clamp and the auxiliary clamp include a long clamp arm and a driving short arm, and a fitting component is provided at the end of the long clamp arm away from the rotating shaft. The fitting component is tightly fitted with the object to be measured in the clamping state, and the driving short arm is connected to the driving cylinder; a sensor is provided on the long clamp arm of the main shaft.

2. The noise, vibration and roughness conductive sensor gripper according to claim 1, characterized in that: The driving cylinder comprises a cylinder body, on which a transmission connection structure is provided. The transmission connection structure is connected to a driving short arm of the clamping jaw body through a driving assembly.

3. The noise, vibration and roughness conductive sensor gripper according to claim 2, characterized in that: The driving assembly includes two driving blocks with the same structure, the driving blocks are connected to the two driving short arms of the clamping jaw body, and a curved convex structure is provided on one side of the driving block close to the driving short arm.

4. The noise, vibration and roughness conductive sensor gripper according to claim 1, characterized in that: The long arm of the clamping jaw of the main pliers is in an arc shape. The driving short arm of the main pliers and the driving short arm of the auxiliary pliers are connected by a spring. A transmission block is provided on the side of the driving short arm away from the spring.

5. The noise, vibration and roughness conductive sensor gripper according to claim 1, characterized in that: The long arm of the clamping jaw of the auxiliary clamp is arc-shaped and shorter than the long arm of the clamping jaw of the main clamp. In the clamping state, the fitting parts on the long arms of the clamping jaws of the main clamp and the auxiliary clamp are asymmetrically fitted with the object to be measured, and vibration signals at different angles are collected.

6. The noise, vibration and roughness conductive sensor gripper according to claim 4, characterized in that: The transmission block is connected to the driving block of the driving assembly, and a curved concave groove corresponding to the curved convex structure on the driving block is provided at the connection between the transmission block and the driving block.

7. The noise, vibration and roughness conductive sensor clamp according to claim 1 or 4, characterized in that: A large fitting component is provided at one end of the long arm of the clamping jaw of the main clamp close to the rotating shaft. The large fitting component is a rectangular structure, and two opposite semicircular grooves are provided on the fitting surface of the rectangular structure and the object to be measured.

8. The noise, vibration and roughness conductive sensor gripper according to claim 1, characterized in that: The fitting component is a square structure, and two semicircular grooves tangent to each other are provided on the fitting surface of the square structure and the object to be measured.

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