A displacement sensor arrangement for a body rigidity test

Abstract

The utility model relates to the field of automobile manufacturing, concretely relates to a displacement sensor arrangement device for the body curvature test, the device includes base, T type support and sensor clamp, the base is fixed on the magnetic attraction seat, through the magnetic attraction seat will base fixed adsorption on the iron floor, be provided with a plurality of mounting holes on the base, the bottom of T type support is provided with mounting hole, through the saucer bolt fixed on the base, be provided with a plurality of adjusting rod through -inserted hole on the crosspiece of T type support, the sensor clamp includes horizontal adjusting rod and longitudinal adjusting rod, horizontal adjusting rod and longitudinal adjusting rod are fixed through saucer bolt, horizontal adjusting rod can pass through the through -inserted hole on the crosspiece of T type support and be fixed through saucer bolt, set up displacement sensor clip on the upper portion of longitudinal adjusting rod, the utility model has big adjustment range, and wide application range can satisfy the test to the bending stiffness of light truck cab (including pick-up truck) and frame, car & SUV body in white, light passenger car body in white etc.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing, specifically to a displacement sensor arrangement device for vehicle body curvature testing. Background Technology

[0002] Static bending stiffness of a vehicle body is a crucial parameter in automotive design, affecting vehicle reliability, safety, weight reduction (due to cost reduction requirements), and NVH performance. Existing vehicle body bending stiffness testing displacement sensors are typically placed under door sill beams, longitudinal beams, the floor, and the bottom of the front and rear seats. The spacing between measuring points on the door sill and longitudinal beams is generally between 200 and 500 mm. For the driver's cab, the main loading method is loading at the center of the seat or simultaneously loading the front and rear seats; for sedans or SUVs, the loading locations are the door sill beams, the front and rear seats, or the center of the trunk. Bending stiffness is calculated by dividing the applied force by the maximum displacement value (obtained from each measuring point). This leads to a problem: the maximum displacement measuring point may exist within a 200 mm range to the left and right of that point, and the obtained maximum displacement value often deviates significantly from the actual maximum displacement value, with a deviation between approximately 0% and 22%. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a displacement sensor arrangement device for vehicle body bending tests. This invention arranges displacement sensors at 50mm intervals on both sides of the loading position corresponding to the vehicle body displacement measurement area, obtaining the maximum displacement value at each measuring point and calculating the vehicle body bending stiffness. This test fixture avoids the risk of testing deviations in existing technologies, thus obtaining accurate vehicle body bending stiffness values. The specific technical solution is as follows:

[0004] A displacement sensor arrangement device for vehicle body curvature testing includes a base, a T-shaped bracket, and a sensor clamp. The base is fixed to a magnetic base and magnetically attached to an iron floor. The base has multiple mounting holes. The bottom of the T-shaped bracket has mounting holes and is fixed to the base by disc bolts. Multiple adjustment rod insertion holes are provided on the crossbar of the T-shaped bracket. The sensor clamp includes a lateral adjustment rod and a longitudinal adjustment rod, which are fixed by disc bolts. The lateral adjustment rod can pass through the insertion holes on the crossbar of the T-shaped bracket and is fixed by disc bolts. A displacement sensor clamp is provided on the upper part of the longitudinal adjustment rod.

[0005] Furthermore, the T-shaped bracket and the base are a pair of matching rectangular steel telescopic sleeves of a set size.

[0006] Furthermore, it also includes a circular magnetic base and a sensor cover, the sensor cover being matched with the sensor and made of aluminum.

[0007] Furthermore, it also includes a rotating fixed disk, which comprises a sliding disk and a rotating disk. The rotating disk is fixed on the sliding disk and rotates on the sliding disk around a fixed axis. A rectangular groove is provided in the middle of the rotating disk, and the size of the rectangular groove matches that of the lateral adjustment rod. The lateral adjustment rod is inserted into the rectangular groove and fixed by a disc bolt.

[0008] Furthermore, the sliding disk is secured to the rotating disk by hexagonal socket head cap screws.

[0009] Furthermore, two sets of each of the T-shaped bracket and the base are provided.

[0010] Furthermore, each of the T-shaped brackets has 9-15 adjustment rod insertion holes on its crossbeam and is equipped with 9-15 sets of the sensor clamps.

[0011] Furthermore, the adjacent adjustment rods are equidistant from each other at 50mm intervals between their insertion holes.

[0012] Furthermore, each of the T-shaped brackets is equipped with 2-4 sets of the rotating fixing discs.

[0013] This invention relates to a displacement sensor arrangement device that overcomes the shortcomings of existing methods that involve separate displacement sensor arrangements, such as insufficient workload, dispersed sensor placement, and inadequate rigidity of the arrangement rods. This invention utilizes a small base to centrally arrange a large number of closely spaced displacement sensors, employing wing nuts and magnetic bases to significantly reduce sensor arrangement time, greatly improve arrangement efficiency, and substantially enhance measurement stability and accuracy.

[0014] This utility model has a large adjustment range and a wide range of applications, and can meet the testing requirements for the bending stiffness of light truck cabs (including pickup trucks) and frames, car and SUV body-in-white, and light bus body-in-white. Attached Figure Description

[0015] Figure 1 The usage status diagram of this device in Example 1;

[0016] Figure 2 The usage status diagram of this device in Example 2;

[0017] Figure label:

[0018] 1-Base, 2-Disc bolt, 3-T-shaped bracket, 4-Displacement sensor clip, 5-Displacement sensor, 6-Sensor cover, 7-Circular magnetic base, 8-Hex socket head cap bolt, 9-Horizontal adjustment rod, 10-Longitudinal adjustment rod, 11-Magnetic base, 12-Iron base, 13-Sliding plate, 14-Hex socket head cap bolt, 15-Rotating plate, 16-Nut, 17-Body body. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0020] like Figure 1-2 As shown, a displacement sensor arrangement device for vehicle body curvature testing includes a base 1, a T-shaped bracket 3, and a sensor clamp. The base 1 is fixed to a magnetic base 11, which magnetically attaches the base 1 to a metal floor 12. The base 1 has multiple mounting holes. The bottom of the T-shaped bracket 3 has mounting holes and is fixed to the base by disc bolts 2. Multiple adjustment rod insertion holes are provided on the crossbar of the T-shaped bracket 3. The sensor clamp includes a lateral adjustment rod 9 and a longitudinal adjustment rod 10, which are fixed by disc bolts 2. The lateral adjustment rod 9 can pass through the insertion holes on the crossbar of the T-shaped bracket 3 and is fixed by disc bolts 2. A displacement sensor clamp 4 is provided on the upper part of the longitudinal adjustment rod for fixing the displacement sensor.

[0021] The T-shaped bracket 3 and the base 1 are a pair of matching rectangular steel telescopic sleeves of a set size.

[0022] It also includes a circular magnetic base 7 and a sensor cover 6, which is matched with the sensor and is made of aluminum.

[0023] It also includes a rotating fixed disk, which includes a sliding disk 13 and a rotating disk 15. The rotating disk 15 is fixed on the sliding disk 13 and rotates on the sliding disk at a fixed axis. A rectangular groove is provided in the middle of the rotating disk. The rectangular groove matches the size of the horizontal adjustment rod 9. The horizontal adjustment rod is inserted into the rectangular groove and fixed by the disc bolt 2.

[0024] The sliding plate is fastened to the rotating plate by an internal hex bolt 14.

[0025] Two sets of the T-shaped bracket and two sets of the base are provided. Each T-shaped bracket has 9-15 adjustment rod insertion holes on its crossbar and is equipped with 9-15 sets of the sensor clamps. Adjacent adjustment rod insertion holes are equidistantly spaced 50mm apart. Each T-shaped bracket is equipped with 2-4 sets of the rotating fixing discs. Example

[0026] The device is used for vehicle body bending stiffness and displacement testing. For a vehicle frame, displacement sensors are arranged at the bottom of the longitudinal beams; for a light commercial vehicle body, displacement sensors are arranged on the bottom longitudinal beams. The displacement sensor mounting fixtures are placed longitudinally with the (lateral) loading position as the center. To meet the testing requirements, this embodiment uses two sets of T-shaped brackets and bases, each configured with nine sensor fixtures, such as... Figure 1 As shown.

[0027] First, place the circular magnetic base (containing a 10mm diameter steel ball) 7 at the bottom measurement position of the vehicle body 17 (symmetrical left and right, the same below); use the displacement sensor clip 4 and M4 hex bolts 8 to fix the nine displacement sensors 5 to the longitudinal adjustment rods 10 of each displacement sensor; cover the head of each displacement sensor 5 with an aluminum cover 6; place the base 1 on the iron floor 12, insert the two T-shaped brackets 3 into the left and right bases 1 respectively, insert the nine transverse adjustment rods 9 into the nine longitudinally equidistant grooves of the brackets 3, insert the nine longitudinal adjustment rods 10 pre-assembled with displacement sensors into the holes of the adjustment rods 9 respectively, and tighten them with M8 butterfly bolts 2, move the entire device to below the vehicle body measurement point, with the center of the device in the X direction on the cross section of the loading position, and placed symmetrically left and right, and the magnetic base 11 firmly adsorbs the base 1 onto the iron floor 12.

[0028] The Y-axis position adjustment of the displacement sensor (symmetrical left and right, the same below) is performed by moving the lateral adjusting rod 9 in the Y direction, and then tightened with M8 wing bolts 2. The Z-axis position adjustment of the displacement sensor (symmetrical left and right, the same below) is performed by moving the bracket 3 and the longitudinal adjusting rod 10 in the Z direction. After determining the height, the bracket 3 and the longitudinal adjusting rod 10 of the displacement sensor are tightened with M8 wing bolts 2. This provides a pre-compression (5-10mm) for each displacement sensor before testing to eliminate any possible measurement gaps. To meet the testing requirements of different vehicle models, the placement height of the displacement sensor can be adjusted not only by the bracket 3 and the longitudinal adjusting rod 10 of the displacement sensor, but also by adding a connecting rod between the bracket 3 and the base 1 to increase the height. The bracket 3 and the base 1 are matched with a pair of rectangular steel telescopic sleeves of a set size, with optional cross-sectional dimensions of 50mm x 40mm and 40mm x 30mm. This is required for the bending stiffness test of the light truck cab. During the test, the vehicle body is subjected to a load and bends downwards, compressing the displacement sensor, thereby measuring the displacement values ​​at various points. The maximum displacement value (average from left to right) is then identified, and the bending stiffness value is calculated. Because the displacement sensor support rod of this device has high stiffness and a fixed spacing, and because the data from the measuring points is stable, reliable, and accurate, it can well meet the needs of bending stiffness testing for various vehicle models. Example

[0029] This embodiment requires measuring the displacement of the front and rear suspension support positions. A set of measuring devices, including a rotating fixture and a sensor fixture, is used, as detailed below. Figure 2 As shown, the base 1 is placed on the iron floor 12 and is firmly attached to the iron floor 12 by the magnetic base 11. The bracket 3 is inserted into the base 1 and fastened with M8 wing bolts 2. The sliding plate 13 moves at both ends of the bracket 3 and is fastened at both ends by M18 nuts 16. The rotating plate 15 can rotate on the fixed axis on the sliding plate 13 and is fastened with M8 socket head cap screws 14. The horizontal adjustment rod 9 is inserted into the upper rectangular groove of the rotating plate 15 and fastened with M8 wing bolts 2. The vertical adjustment rod 10 is inserted into the circular hole of the horizontal adjustment rod 9 and fastened with M8 wing bolts 2. The displacement sensor 5 is fixed on the vertical adjustment rod 10 by the displacement sensor clip 4 and M4 socket head cap screws 8.

[0030] Due to the different requirements of various vehicle models and the design of the test bench, the Z-axis placement height of the displacement sensor has a wide range, ranging from approximately 500 to 1800 mm, while the X-axis position distance ranges from 295 to 1280 mm. The Y-axis position adjustment of the sensor (symmetrical left and right) is achieved by moving the bracket 3 and the longitudinal adjusting rod 10 in the Z-axis direction. After determining the height, the T-shaped bracket 3 and the longitudinal adjusting rod 10 of the displacement sensor are secured with M8 wing bolts 2. The X-axis position adjustment of the displacement sensor (symmetrical left and right) is achieved by sliding the sliding plate 13 on the T-shaped bracket 3 to determine the position, then securing it with M18 nuts 16. The rotating plate 15 rotates on the sliding plate 13, and after determining the position, it is secured with M8 hex bolts 14. The lateral adjusting rod 9 can extend and retract within the rotating plate 15 and is secured with M8 wing bolts to finally determine its position.

[0031] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A displacement sensor arrangement device for vehicle body curvature testing, characterized in that: The device includes a base, a T-shaped bracket, and a sensor clamp. The base is fixed to a magnetic base, which magnetically attaches the base to an iron floor. The base has multiple mounting holes. The bottom of the T-shaped bracket has mounting holes and is fixed to the base with disc bolts. The crossbar of the T-shaped bracket has multiple through holes for adjusting rods. The sensor clamp includes a horizontal adjusting rod and a vertical adjusting rod, which are fixed with disc bolts. The horizontal adjusting rod can pass through the through holes on the crossbar of the T-shaped bracket and is fixed with disc bolts. A displacement sensor clamp is installed on the upper part of the vertical adjusting rod.

2. The displacement sensor arrangement device for vehicle body curvature testing according to claim 1, characterized in that: The T-shaped bracket and the base are a pair of matching rectangular steel telescopic sleeves of a set size.

3. The displacement sensor arrangement device for vehicle body curvature testing according to claim 1, characterized in that: It also includes a circular magnetic base and a sensor cover, which is matched with the sensor and is made of aluminum.

4. The displacement sensor arrangement device for vehicle body curvature testing according to claim 1, characterized in that: It also includes a rotating fixed disk, which comprises a sliding disk and a rotating disk. The rotating disk is fixed on the sliding disk and rotates on the sliding disk around a fixed axis. A rectangular groove is provided in the middle of the rotating disk. The rectangular groove matches the size of the horizontal adjustment rod. The horizontal adjustment rod is inserted into the rectangular groove and fixed by a disc bolt.

5. A displacement sensor arrangement device for vehicle body curvature testing according to claim 4, characterized in that: The sliding disk is secured to the rotating disk by hexagonal socket bolts.

6. The displacement sensor arrangement device for vehicle body curvature testing according to claim 1, characterized in that: Two sets of each of the T-shaped bracket and the base are provided.

7. A displacement sensor arrangement device for vehicle body curvature testing according to claim 6, characterized in that: Each of the T-shaped brackets has 9-15 adjustment rod insertion holes on its crossbar and is equipped with 9-15 sets of sensor clamps.

8. A displacement sensor arrangement device for vehicle body curvature testing according to claim 1, characterized in that: The adjacent adjusting rods are arranged at equal intervals of 50mm between their insertion holes.

9. A displacement sensor arrangement device for vehicle body curvature testing according to claim 4, characterized in that: Each of the T-shaped brackets is equipped with 2-4 sets of the rotating fixing discs.

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