Device and method for testing load of front shock absorber seat of automobile

Abstract

The invention provides an automobile front shock absorber seat load testing device and method, and relates to the technical field of automobile body testing, the device is provided with a shock absorber seat end tool and positioning equipment, the upper end of the shock absorber seat end tool can be connected with a loading part, and the lower end of the shock absorber seat end tool can be connected with a shock absorber seat. The load output by the loading part can be transmitted to a to-be-detected shock absorber seat; the positioning equipment can be detachably connected with the shock absorber seat end tool, is used for positioning the loading part, can adapt to different-angle assembly of front shock absorber seats of different vehicle types, can install the loading part for applying load in place at one time, does not need to be repeatedly adjusted and disassembled, saves the labor cost, and improves the test precision.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile body testing, and more specifically, relates to a vehicle front shock absorber seat load testing device and method. Background Art

[0002] As people's requirements for car use continue to change, car structures continue to change, posing challenges to the strength and durability of car structures. The air suspension system adjusts the height of the car body and the stiffness of the suspension system by adjusting the internal air pressure of the air spring to better adapt to road conditions and driving conditions, and improve the comfort and handling of the vehicle. As the level of vehicle intelligence gradually improves, air springs can assist vehicles in actively adjusting while predicting road conditions in advance, making the vehicle have better comfort and handling at the same time. Semi-active suspension and active suspension are gradually becoming important incremental configurations for mid-to-high-end passenger cars.

[0003] Traditional car body shock absorber seats are generally composed of steel structural parts, which play the role of load bearing and collision protection. Under the background of the dual carbon plan, the lightweight of the car body is imminent. The use of aluminum alloy in electric vehicles can greatly reduce the weight of the car. Due to the relatively low strength of aluminum alloy, it is difficult to meet the rigidity requirements of the car body hard points, especially in the front shock absorber seat area. Engineers need to continuously optimize the structure to meet the strength and durability requirements. Engineers usually use multiple rounds of structural optimization combined with multiple rounds of CAE simulation analysis to verify the strength and durability of the front shock absorber seat. Accurate working condition design can ensure the accuracy of CAE simulation analysis, which is related to the strength and durability of the final product.

[0004] In summary, the front shock absorber seat of the car can be subjected to load loading test, which can be used as the basis for CAE simulation analysis and structural design in the subsequent structural improvement stage, improve the simulation accuracy, and ultimately improve the strength and durability of the product. However, in the load loading test of the front shock absorber seat of the car, the front shock absorber generally has an inward tilt angle. Due to the different heights of different models and the different angles of their front shock absorber seats, the test tooling needs to be adjusted and disassembled many times. At the same time, it often takes many adjustments to accurately find the tooling position for one experiment. In addition, the body-in-white involved in the test and the loading components that apply load to the shock absorber seat are heavy, and the tooling adjustment is time-consuming and laborious. Summary of the invention

[0005] The purpose of the present invention is to provide a vehicle front shock absorber seat load testing device and method to solve the problem that the loading component needs to be adjusted multiple times when performing load loading test on the vehicle front shock absorber seat in the prior art.

[0006] In order to achieve the above-mentioned object, the present invention provides a vehicle front shock absorber seat load test device and method. On the one hand, the vehicle front shock absorber seat load test device comprises:

[0007] A shock absorber seat end tooling, wherein the upper end of the shock absorber seat end tooling can be connected to the loading component, and the lower end can be connected to the shock absorber seat, and can transfer the load output by the loading component to the shock absorber seat;

[0008] A gantry having a crossbeam capable of mounting a loading component and providing a reaction force during the loading process;

[0009] A positioning device is detachably connected to the shock absorber seat end tooling and is used to position the loading component.

[0010] The device also includes:

[0011] A connecting frame, the connecting frame can be installed with the loading component, the connecting frame is movably connected to the crossbeam, and the connecting frame can slide along the crossbeam;

[0012] A locking device is provided, wherein the locking device can lock the connecting frame on the crossbeam.

[0013] The connecting frame comprises an upper plate and a lower plate. The lower surface of the upper plate is formed with a plurality of circular grooves. Steel balls are arranged in the circular grooves. The steel balls can roll in the circular grooves. The upper plate and the lower plate are connected by a plurality of screws.

[0014] The device also includes a driving component, which is connected to the connecting frame and can drive the connecting frame to slide along the crossbeam.

[0015] The device also includes:

[0016] The body-in-white fixing tool is used to fix the body-in-white to the ground, and the body-in-white fixing tool has a plurality of threshold beam connecting plates and a plurality of ground support frames, the plurality of threshold beam connecting plates are used to connect with the threshold beams of the body-in-white, the ground support frames are used to connect with the ground, and the threshold beam connecting plates can be connected to the ground support frames.

[0017] A front longitudinal beam fixing frame for limiting the front end of the front longitudinal beam of the body in white, the front longitudinal beam fixing frame has a horizontally arranged pressure beam and at least two vertically arranged connecting columns, the pressure beam is pressed on the front end of the front longitudinal beam, and the connecting columns connect the pressure beam and the ground.

[0018] The device also includes: a laser line projector, which can project light to provide a reference for positioning the body in white.

[0019] Positioning equipment includes:

[0020] Positioning device body, capable of measuring distance and angle;

[0021] The anti-skid bracket, through which the positioning device body is detachably connected to the shock absorber seat end tooling;

[0022] A roll-up projection screen, which can be unfolded and rolled up, is arranged under the crossbeam and is parallel to the crossbeam after being unfolded;

[0023] The positioning device provides the position information of the shock absorber seat end fixture by measuring the distance and angle between the shock absorber seat end fixture and the roll-type projection screen.

[0024] The shock absorber seat end tooling includes:

[0025] A lifting fixture, wherein an upper connecting plate of the lifting fixture is fixedly connected to the upper end opening of the U-shaped chassis, the shape and size of the upper connecting plate match the shape and size of the loading end of the loading component, and the upper connecting plate is provided with a plurality of first bolt mounting holes for connecting the loading end of the loading component;

[0026] The shock absorber seat connecting plate is provided with a plurality of second bolt connecting holes for connecting the shock absorber seat.

[0027] A connecting cylinder, wherein a threaded hole is provided in the center of the connecting cylinder and passes through the cylinder in the axial direction, a third bolt connection hole corresponding to the threaded hole is provided in the center of the bottom end of the U-shaped chassis, and a fourth bolt connection hole corresponding to the threaded hole is provided in the center of the shock absorber seat connecting plate;

[0028] A long bolt is passed through the third bolt connection hole, the threaded hole, and the fourth bolt connection hole in sequence, and the end of the long bolt is fastened by a nut.

[0029] On the other hand, the present invention provides a method for testing the load of a front shock absorber seat of an automobile, using the vehicle front shock absorber seat load testing device of the present invention, the method comprising:

[0030] Place the body-in-white under the beam;

[0031] Install the shock absorber seat end tooling on the shock absorber seat;

[0032] Install the positioning equipment on the shock absorber seat end fixture and position the loading parts;

[0033] Install the loading component between the crossbeam and the shock absorber seat end fixture;

[0034] The shock absorber seat is tested by applying a load to the shock absorber seat using a loading component.

[0035] Install the positioning equipment on the shock absorber seat end fixture and position the loaded parts, including:

[0036] Set up marks to provide reference for positioning the body-in-white;

[0037] Fix the body in white to the ground based on the reference provided by the markings;

[0038] Collect the position information of the shock absorber seat end tooling;

[0039] Based on the position information of the shock absorber seat end tooling, the position of the loading component is determined.

[0040] The present invention provides a vehicle front shock absorber seat load test device and method, which have the beneficial effects of: the device comprises a shock absorber seat end tooling and a positioning device, the upper end of the shock absorber seat end tooling can be connected to a loading component, and the lower end can be connected to the shock absorber seat, and the load output by the loading component can be transmitted to the shock absorber seat to be tested; the positioning device can be detachably connected to the shock absorber seat end tooling, and is used to position the loading component, can adapt to the assembly of different angles of the front shock absorber seats of different vehicle models, and can install the loading component for applying the load in place at one time without repeated adjustment and disassembly, thereby saving labor costs and improving test accuracy.

[0041] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0043] Figure 1 A schematic structural diagram of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0044] Figure 2 A schematic diagram of the lower plate structure of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0045] Figure 3 A schematic diagram of the lower plate structure of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0046] Figure 4 A schematic diagram of a shock absorber seat end tooling structure of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0047] Figure 5 A schematic diagram of the structure of a lifting tool of a vehicle front shock absorber seat load test device in a bottom view according to an embodiment of the present invention is shown;

[0048] Figure 6 A schematic diagram of the structure of a shock absorber seat connecting plate of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0049] Figure 7A schematic diagram of a connecting cylindrical structure of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0050] Figure 8 A schematic diagram of the connection structure between a positioning device body and an anti-slip bracket of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0051] Fig. 9 A schematic diagram of the structure of a front longitudinal beam fixing frame of a vehicle front shock absorber seat load testing device according to an embodiment of the present invention is shown;

[0052] Fig.10 A schematic diagram of a positioning method of a vehicle front shock absorber seat load test device according to an embodiment of the present invention is shown. Figure 1 ;

[0053] Fig.11 A schematic diagram of a positioning method of a vehicle front shock absorber seat load test device according to an embodiment of the present invention is shown. Figure 2 ;

[0054] Fig.12 A flow chart of a method for testing a load of a front shock absorber seat of an automobile according to an embodiment of the present invention is shown.

[0055] Description of reference numerals:

[0056] 1. Shock absorber seat end tooling; 110. Hoisting tooling; 111. Upper connecting plate; 112. First bolt mounting hole; 113. U-shaped chassis; 114. Third bolt connection hole; 120. Shock absorber seat connecting plate; 121. Second bolt connection hole; 122. Fourth bolt connection hole; 130. Connecting cylinder; 131. Threaded hole; 140. Long bolt; 150. Nut;

[0057] 2. Gantry; 201. Horizontal beam; 202. Vertical beam;

[0058] 3. Positioning device; 301. Positioning device body; 302. Anti-slip bracket; 303. Roll-up projection screen; 304. Laser projection device;

[0059] 4. Connecting frame; 401. Upper plate; 402. Lower plate; 403. Circular groove; 404. Steel ball;

[0060] 5. Push and pull the lead screw;

[0061] 6. Auxiliary hydraulic rod;

[0062] 7. Body-in-white fixing tooling;

[0063] 8. Front longitudinal beam fixing frame; 801. Pressure beam; 802. Connecting column;

[0064] 9. Body in white; 901. Shock absorber seat. DETAILED DESCRIPTION

[0065] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0066] The present invention provides a vehicle front shock absorber seat load test device and method. Figure 1 As shown, the vehicle front shock absorber seat load test device includes:

[0067] The shock absorber seat end fixture 1, the upper end of the shock absorber seat end fixture 1 can be connected to the loading component, and the lower end can be connected to the shock absorber seat 901, and the load output by the loading component can be transferred to the shock absorber seat 901, which is used to simulate the front shock absorber seat 901 being squeezed and stressed by the air spring. Specifically, the loading component can be implemented by a hydraulic cylinder or other device in the prior art; the shock absorber seat end fixture 1 can use a variety of structures such as columns, rods or frames to achieve load transfer, the upper end structure is set according to the specific model of the loading component to be connected, and the lower end structure is set according to the shape and size of the shock absorber seat 901 to be tested, and can be implemented by bolt connection, fixture connection or welding, etc., as long as the upper end can be firmly connected to the loading component and the lower end can be firmly connected to the shock absorber seat 901.

[0068] Gantry 2, gantry 2 has a crossbeam 201, crossbeam 201 can be installed with loading components and provide reaction force for the loading process. Specifically, gantry 2 can adopt the existing structure, and the connection between crossbeam 201 and load loading part can be adopted in a variety of ways, such as setting multiple mounting holes on crossbeam 201, selecting specific mounting holes according to actual test needs and fixing the loading component by bolts; or setting a slidable connecting frame 4 on crossbeam 201, the loading component is connected to crossbeam 201 through connecting frame 4, and the position of the loading component is adjusted by moving connecting frame 4. In this embodiment, gantry 2 has a pair of vertical beams 202, and crossbeam 201 and vertical beam 202 are bolted to form a gate-shaped frame structure.

[0069] Positioning device 3, positioning device 3 can be detachably connected to shock absorber seat end fixture 1, and is used to position the loading component. Specifically, positioning device 3 can use a device that can project light, and adjust the position of the loading component according to the position and angle of the light projected by positioning device 3; positioning device 3 can also use a device that can measure distance and angle, and provide a basis for adjusting the position of the loading component by directly or indirectly measuring the distance and angle between shock absorber seat end fixture 1 and crossbeam 201.

[0070] Furthermore, the device also includes a connecting frame 4, which can install a loading component, and the connecting frame 4 is movably connected to the beam 201, and the connecting frame 4 can slide along the beam 201; in specific implementation, the sliding of the connecting frame 4 can be achieved by arranging rollers, guide rails, sliders, etc. on the beam 201.

[0071] Furthermore, the device also includes a locking device, which can lock the connecting frame 4 on the crossbeam 201. In specific implementation, the locking can be achieved by means of positioning pins, bolts, positioning blocks, etc. After the position of the loading component is adjusted, the connecting frame 4 is locked by the locking device to prevent the loading component from moving when applying a load.

[0072] Further, if Figure 2 , 3 As shown, the connecting frame 4 includes: an upper plate 401 and a lower plate 402. A plurality of circular grooves 403 are formed on the lower surface of the upper plate 401. Steel balls 404 are arranged in the circular grooves 403. The steel balls 404 can roll in the circular grooves 403. The upper plate 401 and the lower plate 402 are connected by a plurality of screws. The rolling of the steel balls 404 in the circular grooves 403 realizes the movable connection between the connecting frame 4 and the crossbeam 201. In this embodiment, the lower plate 402 is an inverted U-shape. The inverted U-shaped structure can be conveniently connected to the loading component, increase the strength of the connecting frame 4, and can also hide and protect the screw. When the connecting frame 4 needs to be moved, the screw is loosened to make the connecting frame 4 in a slidable state; after the connecting frame 4 is adjusted in place, the screw is tightened to assist the locking of the connecting frame 4.

[0073] Further, the device also includes a driving component, which is connected to the connecting frame 4 and can drive the connecting frame 4 to slide along the crossbeam 201. Specifically, the driving component can be implemented by various means such as a screw, a gear transmission, a hydraulic device, etc. The driving component can save labor costs and improve test accuracy. In this embodiment, the driving component adopts a pair of push-pull screws 5, which are arranged in parallel with the crossbeam 201, one end of the push-pull screw 5 is connected to the gantry 2, and the other end of the push-pull screw 5 is connected to one side of the connecting frame 4; the locking device adopts a pair of auxiliary hydraulic rods 6, which are parallel to the crossbeam 201 and arranged opposite to the push-pull screw 5, one end of the auxiliary hydraulic rod 6 is connected to the other side of the connecting frame 4, and the other end of the auxiliary hydraulic rod 6 is connected to the gantry 2; in specific implementation, the push-pull screw 5 is first used to drive the connecting frame 4 to move to adjust the position of the loading component. After being adjusted in place, the auxiliary hydraulic rod 6 tightens and locks the connecting frame 4 on the side opposite to the push-pull screw 5.

[0074] Further, such as Figure 1 As shown, the device also includes a body-in-white fixing fixture 7 for fixing the body-in-white 9 to the ground. The body-in-white fixing fixture 7 has a plurality of sill beam connecting plates and a plurality of ground support frames. The plurality of sill beam connecting plates are used to connect to the sill beam of the body-in-white 9. The ground support frame is used to connect to the ground. The sill beam connecting plates can be connected to the ground support frame. This embodiment uses four sill beam connecting plates and four ground support frames. In specific implementation, the four sill beam connecting plates are vertically symmetrically welded to the front, rear, left and right positions of the sill beam of the body-in-white 9. The four ground support frames are respectively connected to the sill beam connecting plates and the ground by bolt connection to prevent the body from moving when a load is applied.

[0075] Further, such as Fig. 9 As shown, the device further includes a front longitudinal beam fixing frame 8 for limiting the front end of the front longitudinal beam of the body-in-white 9, and the front longitudinal beam fixing frame 8 has a horizontally arranged pressure beam 801 and at least two vertically arranged connecting columns 802, the pressure beam 801 is pressed on the front end of the front longitudinal beam, and the connecting column 802 connects the pressure beam 801 and the ground. Downward pressure is provided on the front end of the front longitudinal beam to prevent the front part of the body-in-white 9 from rising abnormally during the load loading process.

[0076] Further, such as Figure 1As shown, the device also includes: a laser line projector 304, which can project light to provide a reference for positioning the body-in-white 9. The laser line projector 304 can be installed at any position, and the light can be projected on the ground, on the body, or at other positions. The projection shape can be a straight line, a point, or a circle, as long as it can provide a reference for positioning the body; in this embodiment, the laser line projector 304 is installed on the gantry 2, and can project a straight line on the ground. The position of the body-in-white 9 is adjusted with this straight line as a reference to ensure that the center of the central circular hole of the shock absorber seat 901 to be tested is on the projected straight line.

[0077] Further, such as Figure 8 As shown, the positioning device 3 includes: a positioning device body 301, an anti-slip bracket 302, and a roll-up projection screen 303. The positioning device body 301 can measure distance and angle. The positioning device body 301 is detachably connected to the shock absorber seat end tooling 1 through the anti-slip bracket 302. The roll-up projection screen 303 is arranged below the crossbeam 201 and can be unfolded and rolled up. After unfolding, it is parallel to the crossbeam 201. The positioning device 3 provides the position information of the shock absorber seat end tooling 1 by measuring the distance and angle between the shock absorber seat end tooling 1 and the roll-up projection screen 303. Specifically, since the cross beam 201 is installed with the connecting frame 4 and the loading component, a flat plane cannot be formed under the cross beam 201, and the distance between the shock absorber seat end fixture 1 and the cross beam 201 cannot be accurately measured. Therefore, a roll-up projection screen 303 is provided. After the roll-up projection screen 303 is unfolded, a flat plane can be formed under the cross beam 201. The relative position information of the shock absorber seat end fixture 1 and the cross beam 201 can be indirectly obtained by measuring the distance and angle between the shock absorber seat end fixture 1 and the roll-up projection screen 303. After positioning and measuring, the roll-up projection screen 303 is rolled up to avoid affecting the work of other components.

[0078] Further, such as Figure 4 , 5As shown in , 6 and 7 , the shock absorber seat end tooling 1 includes: a lifting tooling 110 , a shock absorber seat connecting plate 120 , a connecting cylinder 130 , and a long bolt 140 . The upper connecting plate 111 of the lifting tool 110 is fixedly connected to the upper end opening of the U-shaped base frame 113. The shape and size of the upper connecting plate 111 match the shape and size of the loading end of the loading component. The upper connecting plate 111 is provided with a plurality of first bolt mounting holes 112 for connecting the loading end of the loading component; the shock absorber seat connecting plate 120 is provided with a plurality of second bolt connecting holes 121 for connecting the shock absorber seat 901; a threaded hole 131 is axially penetrated at the center of the connecting cylinder 130, a third bolt connecting hole 114 corresponding to the threaded hole 131 is provided at the center of the bottom end of the U-shaped base frame 113, and a fourth bolt connecting hole 122 corresponding to the threaded hole 131 is provided at the center of the shock absorber seat connecting plate 120; the long bolt 140 passes through the third bolt connecting hole 114, the threaded hole 131, and the fourth bolt connecting hole 122 in sequence, and the end of the long bolt 140 is fastened by a nut 150. In this embodiment, the U-shaped base frame 113 on the lifting fixture 110 is welded to the upper connecting plate 111 on the lifting fixture 110 by T-shaped connection welding. The third bolt connection hole 114 is opened in the center of the bottom of the U-shaped base frame 113 and connected to the connecting cylinder 130. The opening radius of the third bolt connection hole 114 is 13mm; the shape and size of the upper connecting plate 111 are set according to the size of the loading end of the loading component, and it is preferable to be the same or similar to the shape and size of the loading end of the loading component; four first bolt mounting holes 112 are opened at the corresponding positions of the bolt connection holes of the upper connecting plate 111 and the loading end of the loading component, and the opening radius of the first bolt mounting hole 112 should be set according to the size of the loading end of the loading component. The size of the bolt connection hole on the load end is adjusted; the shock absorber seat connecting plate 120 is designed to be a triangle according to the bolt connection hole of the shock absorber seat 901 and the structural interference problem is taken into consideration. In order to prevent the tip of the triangle from causing stress concentration and accelerating the damage of the shock absorber seat 901, resulting in inaccurate limit load test, the tip of the triangle is designed to be an arc shape; the positions of the three second bolt connection holes 121 on the shock absorber seat connecting plate 120 are determined according to the positions of the bolt mounting holes of the shock absorber seat 901, two of which are R7 bolt mounting holes 106, and one is R6 bolt mounting hole 108, and the axial angle between two adjacent bolt holes is 120° to ensure the accuracy of load simulation.

[0079] like Fig.12 As shown, the present invention also provides a method for testing the load of a front shock absorber seat of an automobile. Using the load testing device for the front shock absorber seat of the present invention, the method comprises:

[0080] Place the body-in-white 9 under the crossbeam 201; specifically, set a mark to provide a reference for positioning the body-in-white 9; this embodiment uses a laser line projector 304 to position the body-in-white 9, turn on the laser line projector 304, let it project a straight line on the ground, adjust the position of the body-in-white 9, and ensure that the center of the central circular hole of the shock absorber seat 901 to be tested is on the projected straight line.

[0081] Based on the reference provided by the mark, the body-in-white 9 is fixed to the ground; specifically, the body-in-white fixing tool 7 is used to fix the body-in-white 9 in this embodiment, and the front longitudinal beam fixing frame 8 is used to limit the front end of the body-in-white 9 to prevent the front part of the body-in-white 9 from rising abnormally during load loading.

[0082] The shock absorber seat end tooling 1 is installed on the shock absorber seat 901; specifically, the upper end of the shock absorber seat end tooling 1 can be connected to the loading component, and the lower end can be connected to the shock absorber seat 901, and the load output by the loading component can be transmitted to the shock absorber seat 901, which is used to simulate the front shock absorber seat 901 being squeezed and stressed by the air spring.

[0083] The positioning device 3 is installed on the shock absorber seat end tooling 1 to position the loading component; specifically, the positioning device 3 can use a device that can project light, and adjust the position of the loading component according to the position and angle of the light projected by the positioning device 3; the positioning device 3 can also use a device that can measure distance and angle, and provide a basis for adjusting the position of the loading component by measuring the distance and angle between the shock absorber seat end tooling 1 and the beam 201.

[0084] The loading component is installed between the crossbeam 201 and the shock absorber seat end tooling 1; specifically, the loading component can be a hydraulic cylinder, which is installed on the crossbeam 201, and the crossbeam 201 provides a reaction force for the loading process.

[0085] The load is applied to the shock absorber seat 901 by using a loading component, and the shock absorber seat 901 is tested.

[0086] Optionally, the shock absorber seat 901 is tested including:

[0087] The ultimate load test is performed, and the loading component slowly increases the force on the shock absorber seat 901 until the shock absorber seat 901 is destroyed, and the load at the destruction moment is recorded. The load at the destruction moment is the ultimate load.

[0088] A fatigue test is performed to apply a load of a fixed amplitude and a fixed number of times to the shock absorber seat 901, and then evaluate whether there are cracks in the shock absorber seat 901 to verify whether it has passed the fatigue test.

[0089] A stress test under variable amplitude load is performed, a strain gauge is attached to the surface of the shock absorber seat 901, a variable amplitude load is applied to the shock absorber seat 901, and the stress time domain signal of the strain gauge is collected at the same time to establish a corresponding relationship between the stress and the variable amplitude load spectrum.

[0090] Further, the positioning device 3 is installed on the shock absorber seat end tooling 1, and the loading component is positioned, including:

[0091] Collect the position information of the shock absorber seat end tooling 1; specifically, unfold the reel-type projection screen 303, and use the positioning device 3 to measure the angle θ between the shock absorber seat 901 tooling and the vertical line; use the positioning device 3 to measure the straight-line distance l from the shock absorber seat 901 to the projection screen 1 ,θ,l 1 That is the position information of the shock absorber seat end tooling 1.

[0092] Based on the position information of the shock absorber seat end tooling 1, the position of the loading component is determined; specifically, Fig.10 As shown, when the shock absorber seat 901 on the same side of the push-pull screw 5 is tested, the formula l=l 2 +l 1 sinθ+htanθ-l 3 / 2Calculate the length l that the push-pull screw 5 needs to extend; Fig.11 As shown, when testing the shock absorber seat 901 on the opposite side of the push-pull screw 5, the formula l=l 2 -l 1 sinθ-htanθ-l 3 / 2Calculate the length l that the push-pull screw 5 needs to extend; where l 2 is the horizontal distance from the shock absorber seat end tooling 1 to the installation end of the push-pull screw 5 (pre-measured), l 3 is the width of the connecting frame 4 (pre-measured), h is the vertical distance between the scroll-type projection screen 303 and the lower surface of the beam 201 (pre-measured); in order to improve the automation of the device, a data acquisition device and a control system can be set to convert the pre-measured l 2 , l 3 The values ​​of θ and l are stored in the control system, and the data acquisition device collects the values ​​of θ and l measured by the positioning device 3. 1 And input it into the control system, the control system calculates the length l that the push-pull screw 5 needs to extend through the above formula, controls the push-pull screw 5 to extend and retract to the required position, and then controls the auxiliary hydraulic rod 6 to lock.

[0093] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A vehicle front shock absorber seat load testing device, characterized in that: The device includes: A shock absorber seat end tooling (1), wherein the upper end of the shock absorber seat end tooling (1) can be connected to a loading component, and the lower end can be connected to a shock absorber seat (901), and can transmit a load output by the loading component to the shock absorber seat (901); A gantry (2), the gantry (2) having a crossbeam (201), the crossbeam (201) being capable of mounting the loading component and providing a reaction force for the loading process; A positioning device (3), the positioning device (3) can be detachably connected to the shock absorber seat end tooling (1) and is used to position the loading component.

2. A vehicle front shock absorber seat load testing device according to claim 1, characterized in that: The device also includes: A connecting frame (4), the connecting frame (4) being capable of mounting the loading component, the connecting frame (4) being movably connected to the crossbeam (201), and the connecting frame (4) being capable of sliding along the crossbeam (201); A locking device, wherein the locking device is capable of locking the connecting frame (4) on the crossbeam (201).

3. A vehicle front shock absorber seat load testing device according to claim 2, characterized in that: The connecting frame (4) comprises: an upper plate (401) and a lower plate (402); a plurality of circular grooves (403) are formed on the lower surface of the upper plate (401); steel balls (404) are arranged in the circular grooves (403); the steel balls (404) can roll in the circular grooves (403); and the upper plate (401) and the lower plate (402) are connected via a plurality of screw rods.

4. A vehicle front shock absorber seat load testing device according to claim 2, characterized in that: The device further comprises: a driving component, the driving component being connected to the connecting frame (4) and being capable of driving the connecting frame (4) to slide along the crossbeam (201).

5. A vehicle front shock absorber seat load testing device according to claim 1, characterized in that: The device also includes: A body-in-white fixing tool (7) for fixing a body-in-white (9) to the ground, the body-in-white fixing tool (7) comprising a plurality of sill beam connecting plates and a plurality of ground support frames, the plurality of sill beam connecting plates being used to connect to the sill beams of the body-in-white (9), the ground support frames being used to connect to the ground, and the sill beam connecting plates being able to connect to the ground support frames; A front longitudinal beam fixing frame (8) for limiting the front end of the front longitudinal beam of the body-in-white (9), the front longitudinal beam fixing frame (8) comprising a horizontally arranged pressure beam (801) and at least two vertically arranged connecting columns (802), the pressure beam (801) pressing on the front end of the front longitudinal beam, and the connecting column (802) connecting the pressure beam (801) and the ground.

6. A vehicle front shock absorber seat load testing device according to claim 1, characterized in that: The device also includes: a laser line projector (304), which can project light to provide a reference for positioning the body in white (9).

7. A vehicle front shock absorber seat load testing device according to claim 1, characterized in that: The positioning device (3) comprises: A positioning device body (301) capable of measuring distance and angle; An anti-slip bracket (302), the positioning device body (301) is detachably connected to the shock absorber seat end tooling (1) via the anti-slip bracket (302); A roll-up projection screen (303), the roll-up projection screen (303) being able to be unfolded and rolled up, the roll-up projection screen (303) being arranged below the crossbeam (201) and being parallel to the crossbeam (201) after being unfolded; The positioning device (3) provides the position information of the shock absorber seat end fixture (1) by measuring the distance and angle between the shock absorber seat end fixture (1) and the roll-type projection screen (303).

8. A vehicle front shock absorber seat load testing device according to claim 1, characterized in that: The shock absorber seat end tooling (1) comprises: A lifting fixture (101), wherein an upper connecting plate (111) of the lifting fixture (101) is fixedly connected to an upper opening of a U-shaped base frame (113), the shape and size of the upper connecting plate (111) match the shape and size of a loading end of a loading component, and the upper connecting plate (111) is provided with a plurality of first bolt mounting holes (112) for connecting the loading end of the loading component; A shock absorber seat connecting plate (120), wherein the shock absorber seat connecting plate (120) is provided with a plurality of second bolt connecting holes (121) for connecting the shock absorber seat (901); A connecting cylinder (130), wherein a threaded hole (131) penetrating in the axial direction is arranged at the center of the connecting cylinder (130), a third bolt connecting hole (114) corresponding to the threaded hole (131) is arranged at the center of the bottom end of the U-shaped chassis (113), and a fourth bolt connecting hole (122) corresponding to the threaded hole (131) is arranged at the center of the shock absorber seat connecting plate (120); A long bolt (140), wherein the long bolt (140) passes through the third bolt connection hole (114), the threaded hole (131), and the fourth bolt connection hole (122) in sequence, and the end of the long bolt (140) is fastened by a nut (150).

9. A method for testing the load of a front shock absorber seat of an automobile, using the front shock absorber seat load testing device of any one of claims 1 to 8, characterized in that: The method includes: Placing the body in white (9) below the crossbeam (201); Installing the shock absorber seat end tooling (1) on the shock absorber seat (901); The positioning device (3) is installed on the shock absorber seat end tooling (1) to position the loading component; Installing the loading component between the crossbeam (201) and the shock absorber seat end tooling (1); The loading component is used to apply a load to the shock absorber seat (901), and the shock absorber seat (901) is tested.

10. A method for testing the load of a front shock absorber seat of an automobile according to claim 9, characterized in that: The positioning device (3) is installed on the shock absorber seat end tooling (1) to position the loading component, including: Collecting position information of the shock absorber seat end tooling (1); Based on the position information of the shock absorber seat end tooling (1), the position of the loading component is determined.

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