Mechanism for measuring real-time deformation of body-in-white frame structure

Abstract

The utility model relates to the field of body-in-white frame deformation measurement, and discloses a mechanism for measuring real-time deformation of a body-in-white frame structure, which comprises clamping units and a displacement measuring unit, the clamping units are positioned at two ends of the displacement measuring unit, and each clamping unit comprises an upper frame connecting block, a lower frame connecting block and a plurality of clamping bolts. The displacement measuring unit comprises an upper telescopic rod pipe fitting, a lower telescopic rod pipe fitting, a rod type displacement sensor, a sensor clamping block and a check block, the upper telescopic rod pipe fitting is in sliding connection with the lower telescopic rod pipe fitting, the rod type displacement sensor is fixedly installed on the outer side of the upper telescopic rod pipe fitting, and the check block is installed on the outer side of the lower telescopic rod pipe fitting in a sleeving mode; the tip of the rod type displacement sensor makes contact with the check block, the upper frame connecting block is connected with the end, away from the lower telescopic rod pipe fitting, of the upper telescopic rod pipe fitting, and the lower frame connecting block is connected with the end, away from the upper telescopic rod pipe fitting, of the lower telescopic rod pipe fitting. According to the utility model, the problem that the real-time deformation of the body-in-white frame structure cannot be measured by the traditional clamp and sensor arrangement method can be solved.

Description

Technical Field

[0001] The utility model relates to the field of body-in-white frame deformation measurement, in particular to a mechanism for measuring the real-time deformation of a body-in-white frame structure. Background Art

[0002] The bending stiffness test and torsional stiffness test of the body in white are two common test methods in automobile structural strength testing. In the bending stiffness test, the body is placed between two support points, and then a force perpendicular to the center line of the body is applied to simulate the vertical load that the vehicle bears during driving. By measuring the degree of deflection of the body during loading, the stiffness and deformation characteristics of the body in various parts can be evaluated. The torsional stiffness test evaluates the stiffness and deformation characteristics of the body in torsional by applying a torsional force between the front and rear suspension systems of the body. In the test, one end of the vehicle is fixed and torque is applied to the other end to simulate the torsion of the vehicle when turning or bearing lateral loads. Both tests are important means to evaluate the structural performance of the body, which can help engineers optimize the body design, improve the safety, comfort and handling of the vehicle, and thus guide the body design and structural optimization.

[0003] At present, the process of body-in-white stiffness test is generally to apply load to the body-in-white to cause it to deform. During the whole test, the sensor transmits the collected signal to the dynamic signal acquisition and analysis system through wires, thereby completing the deformation acquisition at that position, and then obtaining the stiffness characteristics of the body-in-white through data integration and processing. Body-in-white stiffness test usually requires the use of displacement sensors to measure the displacement changes of objects when loaded. Displacement sensors can monitor the displacement of objects in real time and provide data for evaluating the stiffness or characteristics of objects. When performing stiffness tests, displacement sensors can record the displacement changes of objects during loading and transmit these data to test equipment or computers for analysis.

[0004] In traditional body-in-white stiffness testing, displacement sensors are usually placed at locations where large deformations will occur on the body. Common displacement sensor placement locations are mainly concentrated on the lower planes of the longitudinal beams on both sides of the bottom of the body-in-white. The displacement sensors are clamped by a magnetic fixture fixed to the ground, and the sensors are placed vertically below the predetermined collection points to measure the displacement of the collection points relative to the stationary ground. However, compared to the displacement relative to the ground (fixed point) that needs to be measured by traditional placement points, the deformation of the frame structure is reflected between two non-fixed points. Therefore, traditional fixture and sensor placement methods cannot meet the measurement conditions of real-time deformation of the body-in-white frame structure. Utility Model Content

[0005] The utility model aims to provide a mechanism for measuring the real-time deformation of a body-in-white frame structure, so as to solve the problem that the traditional clamp and sensor arrangement method cannot measure the real-time deformation of the body-in-white frame structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A mechanism for measuring the real-time deformation of a body-in-white frame structure, comprising a clamping unit and a displacement measuring unit, wherein the clamping unit is located at both ends of the displacement measuring unit, the clamping unit comprises an upper frame connecting block, a lower frame connecting block, and a plurality of clamping bolts, the displacement measuring unit comprises an upper telescopic rod pipe fitting, a lower telescopic rod pipe fitting, a rod-type displacement sensor, a sensor clamping block, and a stopper, wherein the upper telescopic rod pipe fitting is slidably connected to the lower telescopic rod pipe fitting, the sensor clamping block is sleeved on the outer side of the upper telescopic rod pipe fitting, the sensor clamping block is provided with a clamping hole, the rod-type displacement sensor is fixedly installed in the clamping hole, the stopper is sleeved on the outer side of the lower telescopic rod pipe fitting, the tip of the rod-type displacement sensor contacts the end face of the stopper, the upper frame connecting block is connected to one end of the upper telescopic rod pipe fitting away from the lower telescopic rod pipe fitting, the lower frame connecting block is connected to one end of the lower telescopic rod pipe fitting away from the upper telescopic rod pipe fitting, the end sides of the upper frame connecting block and the lower frame connecting block are both provided with symmetrical threaded holes, the plurality of clamping bolts respectively pass through the threaded holes, and the threaded tail ends of the two symmetrical clamping bolts are opposite.

[0008] The principle of this scheme is:

[0009] In actual application, the measuring point is first clamped by the screwing depth of the clamping bolts of the upper frame connecting block and the lower frame connecting block of the utility model device. During installation, the clamping bolts are first loosened, and the telescopic sleeve composed of the upper telescopic rod pipe fitting and the lower telescopic rod pipe fitting is adjusted to an appropriate degree. The upper and lower frame connecting blocks are respectively clamped at the two points to be measured, and the screwing position of the clamping bolts is adjusted to clamp the sample, and the installation of the sample is completed. When the body-in-white stiffness test is performed, since the upper and lower frame connecting blocks are tightly clamped with the sample, the deformation of the body-in-white will be closely transmitted to the upper and lower frame connecting blocks, thereby causing the telescopic sleeve to be extended and retracted. The rod-type displacement sensor is fixedly installed on the outer side of the upper telescopic rod pipe fitting, and its tip contacts the block fixedly installed on the lower telescopic rod pipe fitting. When the telescopic sleeve is extended and retracted, the block changes its relative position with the tip of the rod-type displacement sensor. By measuring the displacement of the relative position between the block and the tip of the rod-type displacement sensor, the relative deformation of the two points of the body-in-white frame can be known.

[0010] The advantages of this solution are:

[0011] 1. Compared with the measurement method of one moving point and one fixed point deformation (i.e. deformation of the deformation point of the body in white relative to the fixed point on the ground) in the traditional body in white stiffness measurement test, the measurement method targeted by the present invention is two moving point deformations (i.e. deformations of two deformation points of the body frame). The former mainly measures the bottom of the car body in white, and the displacement sensor is fixedly installed on the ground. The latter mainly measures the metal frame of the front windshield of the car cab. The measurement method of the former determines that the installation method of the displacement sensor used cannot meet the measurement requirements of the latter. In response to the measurement requirements of the latter, the present invention provides a test fixture for real-time measurement of the deformation of two points in the body in white frame structure, that is, through the upper and lower frame connection blocks tightly clamped with the two deformation points, and the telescopic sleeve connected to the upper and lower frame connection blocks, the relative deformation of the two deformation points is replaced by the displacement of the telescopic sleeve. Compared with the traditional body in white stiffness measurement test measurement fixture and sensor arrangement method, the present invention is more targeted and usable for frame deformation measurement.

[0012] 2. The utility model adopts fixing methods such as guide sleeve structure connection and bolt connection in the assembly connection. It can adjust the appropriate telescopic sleeve length and clamping tightness according to the measuring objects of different structural sizes. It is also convenient for disassembly and installation, and easy to store and maintain when not in use. It has good universality and applicability.

[0013] Preferably, as an improvement, the clamping unit also includes an upper ball joint connecting block and a lower ball joint connecting block, one end of the upper ball joint connecting block is ball-jointedly connected to an end of the upper telescopic rod pipe fitting away from the lower telescopic rod pipe fitting, the upper frame connecting block is threadedly connected to the other end of the upper ball joint connecting block, one end of the lower ball joint connecting block is ball-jointedly connected to an end of the lower telescopic rod pipe fitting away from the upper telescopic rod pipe fitting, and the lower frame connecting block is threadedly connected to the other end of the lower ball joint connecting block.

[0014] This solution sets a ball joint structure between the telescopic sleeve and the upper and lower frame connection blocks, which is convenient for accurately adjusting and collecting the specific angle between the two points that need to be measured in the body-in-white frame structure. The advantage of the variable angle of the ball joint structure is that it can provide greater flexibility and adaptability. During the actual test process, by adjusting the angle of the ball joint, its relative position, angle and direction can be changed, thereby achieving different assembly configurations and displacement conduction paths. This variable angle design enables the ball joint structure to be fully adapted to various complex working conditions in actual tests, and can meet different design requirements and space restrictions. At the same time, the upper and lower frame connection blocks are connected to the upper and lower ball joint connection blocks through threads, which releases the rotational freedom with the threaded member as the axis, and the angle is relatively adjustable. When the angle is determined, tighten the threaded member, and then the upper and lower frame connection blocks can be locked.

[0015] Preferably, as an improvement, the upper telescopic rod pipe fitting and the lower telescopic rod pipe fitting are clearance-matched to ensure that the upper and lower telescopic rod pipe fittings can slide freely.

[0016] Preferably, as an improvement, the displacement measuring unit further comprises a nylon guide sleeve, which is sleeved at the connection between the upper telescopic rod pipe and the lower telescopic rod pipe. Providing the guide nylon sleeve can fill the excess gap between the upper and lower telescopic rod pipes, thereby increasing the guiding and lubricating functions, so that the upper and lower telescopic rod pipes can be freely extended and retracted more smoothly.

[0017] Preferably, as an improvement, the clamping unit also includes an upper externally threaded ball pin joint bearing, a lower externally threaded ball pin joint bearing, an upper internally threaded pipe fitting adapter, and a lower internally threaded pipe fitting adapter. The upper internally threaded pipe fitting adapter is fixedly connected to one end of the upper telescopic rod pipe fitting away from the lower telescopic rod pipe fitting, and the lower internally threaded pipe fitting adapter is fixedly connected to one end of the lower telescopic rod pipe fitting away from the upper telescopic rod pipe fitting. The upper ball joint connecting block and the lower ball joint connecting block have symmetrical threaded holes on their end sides. The upper externally threaded ball pin joint bearing is connected to the upper ball joint connecting block, and the lower externally threaded ball pin joint bearing is connected to the lower ball joint connecting block by bolts. The upper externally threaded ball pin joint bearing is threadedly connected to the upper internally threaded pipe fitting adapter, and the lower externally threaded ball pin joint bearing is threadedly connected to the lower internally threaded pipe fitting adapter.

[0018] By interconnecting the parts with threaded structures, the entire device can be disassembled and installed, which is convenient for maintenance and storage when not in use.

[0019] Preferably, as an improvement, the tail end of the clamping bolt is attached with a soft anti-skid material. When the to-be-tested point of the sample body-in-white frame structure is a curved surface or a concave-convex structure, a soft anti-skid material (rubber, nylon material, etc.) or plastic steel mud or other materials can be added between the tip of the clamping bolt and the sample to fix it according to the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0021] Figure 2 This is a schematic diagram of the relative positions of the internal threaded pipe adapter of the utility model;

[0022] Figure 3 This is a schematic diagram of the relative positions of the internally threaded pipe adapter of the utility model;

[0023] Figure 4 It is a schematic structural diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The figure marks in the drawings of the specification include: upper frame connecting block 1, upper ball joint connecting block 2, upper external thread type ball pin joint bearing 3, upper telescopic rod pipe fitting 4, rod-type displacement sensor 5, sensor clamping block 6, nylon guide sleeve 7, lower telescopic rod pipe fitting 8, stopper 9, lower external thread type ball pin joint bearing 10, lower ball joint connecting block 11, lower frame connecting block 12, upper internal thread type pipe fitting adapter 13, lower internal thread type pipe fitting adapter 14, clamping bolt 15.

[0026] The embodiment is basically as shown in the attached Figure 1-4 As shown:

[0027] A mechanism for measuring the real-time deformation of a body-in-white frame structure includes a clamping unit, a displacement measuring unit, and the clamping unit is located at both ends of the displacement measuring unit. The clamping unit includes an upper frame connecting block 1, a lower frame connecting block 12, and four clamping bolts 15. The displacement measuring unit includes an upper telescopic rod pipe 4, a lower telescopic rod pipe 8, a rod-type displacement sensor 5, a sensor clamping block 6, and a stopper 9. The upper telescopic rod pipe 4 is slidably connected with the lower telescopic rod pipe 8, and the upper telescopic rod pipe 4 and the lower telescopic rod pipe 8 are clearance-matched. The displacement measuring unit also includes a nylon guide sleeve 7, which is sleeved at the connection between the upper telescopic rod pipe 4 and the lower telescopic rod pipe 8. The sensor clamping block 6 is sleeved on the outer side of the upper telescopic rod pipe 4, and the sensor clamping block 6 is provided with a clamping hole. The rod-type displacement sensor 5 is fixedly installed in the clamping hole. The stopper 9 is sleeved on the outer side of the lower telescopic rod pipe 8, and the tip of the rod-type displacement sensor 5 contacts the end face of the stopper 9.

[0028] The upper frame connecting block 1 is connected to the end of the upper telescopic rod pipe fitting 4 away from the lower telescopic rod pipe fitting 8, and the lower frame connecting block 12 is connected to the end of the lower telescopic rod pipe fitting 8 away from the upper telescopic rod pipe fitting 4. A pair of symmetrical threaded holes are opened on the end sides of the upper frame connecting block 1 and the lower frame connecting block 12, and four clamping bolts 15 pass through the two pairs of threaded holes respectively, and the threaded tail ends of the two symmetrical clamping bolts 15 are opposite.

[0029] The clamping unit also includes an upper ball joint connecting block 2 and a lower ball joint connecting block 11. One end of the upper ball joint connecting block 2 is ball-jointedly connected to the end of the upper telescopic rod pipe fitting 4 away from the lower telescopic rod pipe fitting 8. The upper frame connecting block 1 is threadedly connected to the other end of the upper ball joint connecting block 2. One end of the lower ball joint connecting block 11 is ball-jointedly connected to the end of the lower telescopic rod pipe fitting 8 away from the upper telescopic rod pipe fitting 4. The lower frame connecting block 12 is threadedly connected to the other end of the lower ball joint connecting block 11. The threaded connector used for the above-mentioned threaded connection is a bolt in this embodiment.

[0030] The clamping unit also includes an upper externally threaded ball pin joint bearing 3, a lower externally threaded ball pin joint bearing 10, an upper internally threaded pipe fitting adapter 13, and a lower internally threaded pipe fitting adapter 14. The upper externally threaded ball pin joint bearing 3, the lower externally threaded ball pin joint bearing 10, the upper internally threaded pipe fitting adapter 13, and the lower internally threaded pipe fitting adapter 14 are unified standard parts. The upper internally threaded pipe fitting adapter 13 is fixedly connected to one end of the upper telescopic rod pipe fitting 4 away from the lower telescopic rod pipe fitting 8, and the lower internally threaded pipe fitting adapter 14 is fixedly connected to one end of the lower telescopic rod pipe fitting 8 away from the upper telescopic rod pipe fitting 4, specifically by welding. Symmetrical threaded holes are opened on the end sides of the upper ball joint connecting block 2 and the lower ball joint connecting block 11, the upper externally threaded ball pin joint bearing 3 is connected to the upper ball joint connecting block 2, and the lower externally threaded ball pin joint bearing 10 is connected to the lower ball joint connecting block 11 through stud bolts, the bearing sections of the upper externally threaded ball pin joint bearing 3 and the lower externally threaded ball pin joint bearing 10 are rotatably connected to the smooth sections of the stud bolts, the upper externally threaded ball pin joint bearing 3 is threadedly connected to the upper internally threaded pipe adapter 13, and the lower externally threaded ball pin joint bearing 10 is threadedly connected to the lower internally threaded pipe adapter 14, and nuts are installed as gaskets between the upper externally threaded ball pin joint bearing 3 and the upper internally threaded pipe adapter 13, and between the lower externally threaded ball pin joint bearing 10 and the lower internally threaded pipe adapter 14.

[0031] The rear end of the clamping bolt 15 is attached with a soft anti-skid material, and the soft anti-skid material can be selected from nylon, rubber, etc. according to needs.

[0032] When in use, first clamp the frame to be measured with the device, loosen the tightness of the four clamping bolts 15, adjust the telescopic sleeve composed of the upper telescopic rod pipe 4, the lower telescopic rod pipe 8, and the nylon guide sleeve 7 to the appropriate length of the object to be measured, and adjust the angles of the upper frame connecting block 1, the lower frame connecting block 12 and the upper ball joint connecting block 2, the lower ball joint connecting block 11 according to the angle of the frame to be measured, and the angles between the upper ball joint connecting block 2, the lower ball joint connecting block 11 and the upper telescopic rod pipe 4, the lower telescopic rod pipe 8, and adjust the relative position of the rod sensor clamping block 6 and the stopper 9 to ensure that the tip of the rod displacement sensor 5 is in contact with the end face of the stopper 9. After adjusting the above distance and angle, clamp the two points to be measured with the upper frame connecting block 1 and the lower frame connecting block 12 respectively, and then tighten the four clamping bolts 15 to complete the clamping and installation of the frame to be measured. If the measured point of the frame structure to be measured is a curved structure or a concave-convex structure, a soft anti-slip material such as nylon, rubber, etc. can be added between the tip of the clamping bolt 15 and the measured point as needed.

[0033] When performing a stiffness test, as the two clamping points deform and displace, the upper telescopic rod pipe 4 and the lower telescopic rod pipe 8 slide relative to each other, and the stopper 9 is displaced relative to the tip of the rod-type displacement sensor 5. The rod-type displacement sensor 5 measures the relative deformation amount between the two deformation points by detecting the relative displacement of the stopper 9.

[0034] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the technical solution of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A mechanism for measuring the real-time deformation of a body-in-white frame structure, characterized in that: It includes a clamping unit and a displacement measuring unit. The clamping unit is located at both ends of the displacement measuring unit. The clamping unit includes an upper frame connecting block, a lower frame connecting block, and a plurality of clamping bolts. The displacement measuring unit includes an upper telescopic rod pipe fitting, a lower telescopic rod pipe fitting, a rod-type displacement sensor, a sensor clamping block, and a stopper. The upper telescopic rod pipe fitting is slidably connected to the lower telescopic rod pipe fitting. The sensor clamping block is sleeved on the outside of the upper telescopic rod pipe fitting. The sensor clamping block is provided with a clamping hole. The rod-type displacement sensor is fixedly installed in the clamping hole. The stopper is sleeved on the outside of the lower telescopic rod pipe fitting. The tip of the rod-type displacement sensor contacts the end face of the stopper. The upper frame connecting block is connected to one end of the upper telescopic rod pipe fitting away from the lower telescopic rod pipe fitting. The lower frame connecting block is connected to one end of the lower telescopic rod pipe fitting away from the upper telescopic rod pipe fitting. The end sides of the upper frame connecting block and the lower frame connecting block are both provided with symmetrical threaded holes. The plurality of clamping bolts pass through the threaded holes respectively, and the threaded tail ends of the two symmetrical clamping bolts are opposite.

2. The mechanism for measuring the real-time deformation of the body-in-white frame structure according to claim 1, characterized in that: The clamping unit also includes an upper ball joint connecting block and a lower ball joint connecting block, one end of the upper ball joint connecting block is ball-jointedly connected to an end of the upper telescopic rod pipe fitting away from the lower telescopic rod pipe fitting, the upper frame connecting block is threadedly connected to the other end of the upper ball joint connecting block, one end of the lower ball joint connecting block is ball-jointedly connected to an end of the lower telescopic rod pipe fitting away from the upper telescopic rod pipe fitting, and the lower frame connecting block is threadedly connected to the other end of the lower ball joint connecting block.

3. The mechanism for measuring the real-time deformation of the body-in-white frame structure according to claim 2, characterized in that: The upper telescopic rod pipe fitting and the lower telescopic rod pipe fitting are clearance-matched.

4. The mechanism for measuring the real-time deformation of the body-in-white frame structure according to claim 3, characterized in that: The displacement measuring unit further comprises a nylon guide sleeve, which is sleeved on the connection between the upper telescopic rod pipe fitting and the lower telescopic rod pipe fitting.

5. The mechanism for measuring the real-time deformation of the body-in-white frame structure according to claim 4, characterized in that: The clamping unit also includes an upper externally threaded ball pin joint bearing, a lower externally threaded ball pin joint bearing, an upper internally threaded pipe adapter, and a lower internally threaded pipe adapter. The upper internally threaded pipe adapter is fixedly connected to one end of the upper telescopic rod pipe away from the lower telescopic rod pipe, and the lower internally threaded pipe adapter is fixedly connected to one end of the lower telescopic rod pipe away from the upper telescopic rod pipe. The upper ball joint connecting block and the lower ball joint connecting block have symmetrical threaded holes on their end sides. The upper externally threaded ball pin joint bearing is connected to the upper ball joint connecting block, and the lower externally threaded ball pin joint bearing is connected to the lower ball joint connecting block by bolts. The upper externally threaded ball pin joint bearing is threadedly connected to the upper internally threaded pipe adapter, and the lower externally threaded ball pin joint bearing is threadedly connected to the lower internally threaded pipe adapter.

6. The mechanism for measuring the real-time deformation of the body-in-white frame structure according to claim 5, characterized in that: A soft anti-slip material is attached to the rear end of the clamping bolt.

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