CN114383867B

CN114383867B - Automobile front bracket connection point testing device and testing method

Info

Publication number: CN114383867B
Application number: CN202111642618.4A
Authority: CN
Inventors: 张顺; 王恒; 周波; 钟阳
Original assignee: Dongfeng Motor Group Co Ltd
Current assignee: Dongfeng Motor Group Co Ltd
Priority date: 2021-12-29
Filing date: 2021-12-29
Publication date: 2024-04-02
Anticipated expiration: 2041-12-29
Also published as: CN114383867A

Abstract

The embodiment of the application discloses a device and a method for testing a connecting point of a front bracket of an automobile, relates to the technical field of vehicle engineering, and solves the problem that the bearing condition of the front bracket in an automobile beam system is difficult to effectively simulate under a frontal collision condition. The automobile front bracket connection point testing device comprises a trolley, a supporting component, an impact component and a sensor, wherein the first end of the supporting component is used for fixedly connecting with the trolley or a wall body, and the second end of the supporting component is used for fixedly connecting with an automobile beam system to be tested; the impact assembly is used for being fixedly connected with the trolley or one of the support assemblies which are not connected in the wall body, the impact assembly is provided with an impact piece simulating the automobile power assembly, the impact piece extends out towards the support assembly, the sensor is arranged at the position of the connecting point of the front bracket of the automobile beam system to be tested, and the sensor is used for collecting data of the connecting point of the front bracket of the automobile beam system to be tested in the collision process. The automobile front bracket connection point testing device is used for researching interaction between the automobile beam system front bracket and the power assembly under the frontal collision working condition.

Description

Automobile front bracket connection point testing device and testing method

Technical Field

The embodiment of the application relates to the field of vehicle engineering, but is not limited to, in particular to a device and a method for testing a connecting point of a front bracket of an automobile.

Background

In automobile design, crashworthiness of a vehicle is generally evaluated by means of a frontal collision test, simulation, or the like. In the conventional vehicle structure, the power train disposed in the front compartment tends to move backward and downward in a frontal collision, pressing the firewall and the front bracket, which is one of the causes of the acceleration peak being high. Therefore, in the collision process, the acquisition of the connection strength characteristics of the front bracket connection point and the design of failure parameters become a serious difficulty in the development of the front collision of the automobile.

The automobile frontal collision test in the related art cannot simulate the situation that an automobile power assembly extrudes an automobile beam system front bracket, the measured data cannot completely reflect the stress of the automobile beam system front bracket in the collision process, the data precision is poor, and the research and development of an automobile are not facilitated.

Disclosure of Invention

The automobile front bracket connection point testing device provided by the embodiment of the application has the advantages of high simulation precision, strong applicability and repeated testing.

In a first aspect, an embodiment of the present application provides a device for testing a connection point of a front bracket of an automobile, including a trolley, a support assembly, an impact assembly and a sensor, where the support assembly has a first end for fixedly connecting to the trolley or a wall, and a second end of the support assembly is for fixedly connecting to an automobile beam system to be tested; the impact assembly is used for being fixedly connected with the trolley or one of the support assemblies which are not connected in the wall body, the impact assembly is provided with an impact piece simulating the automobile power assembly, the impact piece extends out towards the support assembly, the sensor is arranged at the position of the connecting point of the front bracket of the automobile beam system to be tested, and the sensor is used for collecting data of the connecting point of the front bracket of the automobile beam system to be tested in the collision process.

According to the device for testing the connection point of the automobile front bracket, the trolley can move towards the wall body according to the set speed and collide with the wall body, the device is used for simulating a scene of front collision of an automobile and an obstacle, the wall body is fixed on the ground, the device has good bearing capacity and can provide stable impact or load; when the supporting component is arranged on the trolley, the impact component is correspondingly arranged on the wall body, the trolley drives the automobile beam system to be tested to move towards the impact component and collide during testing, the situation that the automobile is in front collision with the obstacle is simulated, the mounting positions of the supporting component and the impact component are set according to actual testing requirements, the application range of the testing device is widened, the universality of the testing device is improved, in addition, the impact component comprises an impact piece for simulating the automobile power assembly, the impact piece extends towards the supporting component, namely, the impact piece extends towards the automobile beam system to be tested, specifically, the impact piece extends towards the front bracket of the automobile beam system to be tested, during testing, the bracket extending structure of the automobile beam system to be tested collides with the end face of the wall body or the trolley firstly and deforms along with the deformation of the bracket extending structure of the automobile beam system, the impact piece collides with the front bracket of the tested automobile beam system, the process truly simulates the front collision of the automobile, the front part of the automobile body is deformed firstly, the automobile power assembly positioned in the front cabin is extruded, the automobile power assembly moves towards the front bracket after being extruded, the impact piece extending towards the front bracket of the tested automobile beam system is arranged, the test device effectively simulates the bearing sequence of the front end structure of the automobile in the front collision process and the bearing characteristic of the front bracket of the automobile, thereby providing accurate test data, the sensor is mainly used for collecting and recording force-bending moment signals at the connecting point of the front bracket of the automobile beam system to be tested in the collision test, the connecting point of the front bracket of the automobile beam system is the structure for connecting the front bracket with other parts of the automobile body, and is also the position where the front bracket is most stressed, the strength characteristics and failure parameters of the front bracket attachment points are important indicators of front bracket design time. The test data can be used as effective reference data of the whole vehicle development and simulation pair standard, compared with the scheme that the front bracket of the automobile is difficult to effectively simulate extrusion of the automobile power assembly in the front collision in the related technology, the test device of the application can truly simulate the extrusion bearing condition of the front bracket of the automobile under the automobile power assembly when the automobile is in front collision by arranging the impact piece extending towards the front bracket of the tested automobile beam system, and has the advantages of high simulation precision, strong applicability and repeated test.

In one possible implementation of the present application, the impact member includes an impact head, a supporting portion, and a connecting portion, where the impact head and the connecting portion are respectively fixed at two ends of the supporting portion, and the impact head extends toward the supporting assembly for simulating an automobile power assembly, and the connecting portion is fixedly connected with the trolley or the wall body without the supporting assembly.

According to the automobile front bracket connection point testing device, in order to facilitate connection of the impact piece and the trolley or the wall body and ensure the impact effect of the impact piece on the automobile beam system to be tested, the impact head in the impact piece is used for directly colliding with the automobile beam system to be tested, the connecting part is used for fixing the impact piece on the wall body or the trolley so as to ensure stability of the impact piece in a collision process, the supporting part is used for connecting the impact head with the connecting part and increasing the length of the impact piece, so that the impact head can extend into the supporting component, and accordingly the front longitudinal beam and bracket extension structure deformation of the automobile beam system to be tested in the collision process is simulated, and then the bearing sequence of the bracket body stress is simulated.

In one possible implementation of the present application, the impact head is cylindrical and extends in a horizontal direction, the direction of extension of the impact head being perpendicular to the direction of movement of the trolley.

The embodiment of the application provides a car front bracket tie point testing arrangement for guarantee to make the impact head can better simulation car power assembly for impact head extends in the horizontal direction, and make its extending direction and platform truck direction of motion perpendicular, thereby make impact head and the collision area of waiting to test car roof beam system on the horizontal direction bigger, and then make the whole collision impact that receives of the front bracket of waiting to test car roof beam system, simulate the situation that the whole extrusion of bracket before the car power assembly atress is towards waiting to test car roof beam system in the frontal collision in-process, cylindric impact head bearing capacity is strong, more resistant to impact.

In one possible implementation of the present application, the supporting portion includes a plurality of rod-like structures arranged in parallel, an included angle between the supporting portion and a horizontal direction of the connecting portion is an acute angle, and the connecting portion is higher than the impact head.

The utility model provides a bracket tie point testing arrangement before car, in order to save material under the prerequisite that can guarantee impact piece structural strength, reduce cost, through setting up the rod-like structure, the supporting part between connecting portion and the impact head is the frame support, required material is less to reduce cost, a plurality of rod-like structures provide the support for the impact head simultaneously, can guarantee the structural strength of impact piece, and the rod-like structure of connecting portion has increased the length of impact piece in addition, makes impact head its can stretch out towards supporting component. In the real collision process, the force applied to the front bracket of the automobile beam system by the automobile beam system is obliquely downward, so that the force applied to the automobile beam system by the automobile beam system is obliquely upward, and the situation is simulated in the test process, namely, the force applied to the impact piece by the automobile beam system to be tested is obliquely upward, so that the bearing capacity of the impact piece is enhanced, the rod-shaped structure of the supporting part is obliquely downward, specifically, the included angle between the supporting part and the horizontal direction of the connecting part is set to be an acute angle, and the connecting part is higher than the impact piece, so that the direction of the impact force borne by the rod-shaped structure of the supporting part is generally consistent with that of the impact force borne by the supporting piece, the bending moment borne by the rod-shaped structure is smaller, and the impact piece is not easy to break and destroy, thereby improving the bearing energy of the impact piece.

In one possible implementation of the present application, the support assembly further comprises a fixed barrier for being fixed to the ground to simulate a wall, the first end of the support assembly being adapted to be connected to a trolley or the fixed barrier, the connection being fixedly connected to one of the trolley or the fixed barrier to which the support assembly is not connected.

The utility model provides a car front bracket tie point testing arrangement, in order to guarantee the integrality of device, this car front bracket tie point testing arrangement still includes fixed barrier, fixed barrier can be used to simulate the wall body, it is firmly fixed on ground, can guarantee the stability at the collision in-process, supporting component's first end can be connected on platform truck or fixed barrier, when supporting component's first end is connected with the platform truck, the impact piece then is fixed on fixed barrier, during the test, carry the impact piece collision that awaits measuring car roof beam system orientation fixed barrier by the platform truck, the reaction force of impact piece is treated the car roof beam system and is produced the impact, when supporting component's first end is connected with fixed barrier, the impact piece then is fixed on the platform truck, carry the impact piece by the platform truck towards the car beam system that awaits measuring on the fixed barrier and collide, so that the impact piece treats the car beam system that awaits measuring produces the impact.

In one possible implementation manner of the present application, the first end of the support assembly is fixedly connected with the trolley, the connecting portion is fixedly connected with the fixed barrier, the fixed barrier is provided with a T-shaped chute in the horizontal direction, the T-shaped chute is slidably connected with the slider, the connecting portion is fixed with the slider through the fastener, and the fastener can lock the slider with the fixed barrier.

The utility model provides a bracket tie point testing arrangement before car, in order to make the impact member can adjust in the horizontal direction, so that the impact member can more accurate treat the front bracket of test car roof beam system and strike, the fixed barrier that is fixed mutually with the connecting portion of impact member has T type spout, the connecting portion is connected with the slider, the slider slides in T type spout, thereby adjust the position of impact member on the horizontal direction, so that the impact member can just to the collision position of test car roof beam system in the horizontal direction, set up T type spout because it has spacing flange to carry out spacingly to the slider, can avoid the slider to deviate from T type spout by the power of perpendicular to fixed barrier. The connecting portion is connected with the sliding block through the fastening piece, the connecting portion and the sliding block are convenient to assemble and disassemble, the fastening piece can be a screw, the fastening piece penetrates through the connecting portion along the direction of the vertical fixing barrier and is connected into the sliding block through the opening thread of the T-shaped sliding groove, when the fastening piece is screwed down, the sliding block is gradually close to the connecting portion, the limiting flange of the T-shaped sliding groove is positioned between the sliding block and the connecting portion and can be gradually extruded by the sliding block, the friction force of the sliding block and the limiting flange of the T-shaped sliding groove is gradually increased, so that the sliding block is prevented from sliding along the extending direction of the T-shaped sliding groove, the sliding block is locked in the T-shaped sliding groove, namely, the fastening piece locks and fixes the impact piece, the sliding block and the fixing barrier simultaneously, and the convenience of adjusting the position of the impact piece is improved.

In one possible implementation of the present application, there are a plurality of T-shaped runners, the plurality of T-shaped runners are evenly arranged along a vertical direction, and the T-shaped runners penetrate through the fixed barrier along an extending direction thereof.

According to the automobile front bracket connection point testing device, for the convenience of adjustment of the height of the impact piece, the plurality of T-shaped sliding grooves are formed in the fixed barrier, the plurality of sliding grooves are uniformly distributed in the vertical direction, when the connecting portions of the impact piece are connected with the T-shaped sliding grooves at different heights, the height of the impact piece is changed along with the T-shaped sliding grooves, the impact piece with the adjustable height can be suitable for the automobile beam system to be tested at different heights, accordingly, the application scene of the testing device is widened, universality of the testing device is improved, the impact piece is convenient to adjust among the T-shaped sliding grooves at different heights, the T-shaped sliding grooves penetrate through the fixed barrier along the extending direction of the T-shaped sliding grooves, and in specific adjustment, only the fastening piece between the connecting portions and the sliding blocks is required to be loosened, so that the sliding blocks can slide in the T-shaped sliding grooves, the end portions of the T-shaped sliding grooves slide out, the end portions of the other T-shaped sliding grooves slide in, the height of the impact piece can be changed, the impact piece can be adjusted to a proper position in the horizontal direction, and the fastening piece can be adjusted to the proper position, and the connecting portions, the sliding blocks and the fixing barrier can be locked.

In one possible implementation of the application, the support assembly comprises a vertically arranged support mounting plate and a longitudinal beam connecting part, wherein the support mounting plate is provided with a mounting hole, the support mounting plate is fixed with one of the trolley or the wall body through the mounting hole, and the longitudinal beam connecting part is used for being fixed with an automobile beam system to be tested.

The embodiment of the application provides a bracket tie point testing arrangement before car, in order to be convenient for with the fixed of supporting component and platform truck or wall body, the position of conveniently adjusting supporting component according to actual demand, through setting up the support mounting panel, and set up the mounting hole on the support mounting panel, thereby through fastener can be convenient with supporting component and platform truck or wall body installation or dismantlement, the convenience of supporting component installation has been improved, and the convenience of supporting component mounted position adjustment, in addition, in order to be convenient for with the automobile beam system that awaits measuring fixed, still be provided with the longeron connecting portion fixed with the support mounting panel, will await measuring automobile beam system fixed on the support mounting panel through longeron installation department, and then with longeron installation department and platform truck or wall body firm fixed.

In one possible implementation of the present application, the stringer connection portion includes a stringer welding plate and a stringer bracket, the stringer welding plate is used for welding with a front stringer of the automobile beam system to be tested, and the stringer welding plate and the bracket mounting plate are respectively fixed at both ends of the stringer bracket extending direction.

The utility model provides a car front bracket tie point testing arrangement, in order to guarantee to await measuring the automobile beam system and can firmly fix with supporting component, through setting up longeron welded plate, longeron welded plate welds together with the front longitudinal beam of awaiting measuring the automobile beam system, and welded connection intensity is high, need not to handle the structure of front longitudinal beam simultaneously to guaranteed the structural integrality of front longitudinal beam, simulation automobile beam system is better at the effect of front collision in-process force transmission.

In one possible implementation of the present application, the support assembly further includes a sensor bracket, the first end of the sensor bracket is fixed to the bracket mounting plate, the second end of the sensor bracket extends to a connection point position of the front bracket of the automobile beam system to be tested, and the sensor is fixed to the second end of the sensor bracket and abuts against the connection point position of the front bracket of the automobile beam system to be tested.

The embodiment of the application provides a bracket tie point testing arrangement before car, in order to be convenient for the location of sensor, through setting up the sensor support, the first end of sensor support is fixed on the support mounting panel, and fix the sensor at the second end of sensor support, thereby with sensor and support mounting panel relative fixation, simultaneously because wait to test the automobile beam system and pass through longeron welded plate and longeron support and fix on the support mounting panel, therefore sensor and wait to test the automobile beam system relative fixation, through the tie point position that extends the second end of sensor to wait to test the bracket before the automobile beam system, alright light position the tie point position of bracket before waiting to test the automobile beam system with the sensor.

In one possible implementation of the present application, a sensor mounting plate is provided between the sensor and the sensor support, the sensor mounting plate is fixed to the sensor support, and the sensor is connected to the sensor mounting plate through a fastener.

The embodiment of the application provides a bracket tie point testing arrangement before car, in order to be convenient for the assembly and the maintenance of sensor and sensor support, through setting up the sensor mounting panel, it is fixed with sensor support with sensor mounting panel, and the sensor then passes through the fastener to be connected with the sensor mounting panel, and the installation and the dismantlement of being convenient for to make things convenient for the assembly and the maintenance of sensor, reduced the maintenance cost of this device, improved the ease of use of this device.

In one possible implementation manner of the present application, the sensor and the sensor support are multiple, and the multiple sensors are arranged in one-to-one correspondence with the multiple sensor supports.

In order to improve test efficiency and test precision, the plurality of sensors can be installed at a plurality of positions to be measured of the automobile beam system to be tested, data of the plurality of positions to be measured are acquired simultaneously in a collision process, so that test efficiency is improved, the automobile beam system to be tested is of a symmetrical structure, data of the opposite positions to be measured in the collision process are supposed to be converged, and when the two sensors are positioned at the symmetrical positions to be measured of the automobile beam system to be tested, test data can be mutually compared, random errors are eliminated, and test precision is improved. In addition, the sensor support plays a supporting role on the sensor, and simultaneously plays a positioning role on the sensor, and the sensor support corresponds to the sensors one by one through the arrangement of the sensors, so that the sensor support can not affect other sensors when the position of the sensor needs to be adjusted.

In one possible implementation of the application, the sensor comprises a sensor body and a transition sleeve, the transition sleeve having an external thread, a first end of the transition sleeve being screwed to the sensor body, and a second end of the sensor being screwed to a connection point of the front carrier of the automobile beam to be tested.

According to the automobile front bracket connection point testing device, the connection point sizes of the front brackets of the automobile beam system to be tested are different, so that the sensor can be matched with the connection points of the front brackets of the automobile beam system to be tested in different sizes, the sensor body is used for collecting and recording force-bending moment signals in the collision process, the transition shaft sleeve is arranged, the transition shaft sleeve can be well matched and connected with the connection points of the front brackets of the automobile beam system to be tested, the transition shaft sleeve can be connected with the sensor body, the strength characteristics and failure parameters of the connection points of the front brackets of the automobile beam system to be tested are transmitted to the sensor body through the transition shaft sleeve, and therefore the universality of the device is improved, and meanwhile, the cost is lower.

In one possible implementation of the application, the sensor support and the stringer support are both fixed to the support mounting plate by means of a connecting plate, which is fixed to the support mounting plate by means of a fastening element.

The embodiment of the application provides a car front bracket tie point testing arrangement, for the assembly and the maintenance of this application sensor support, longeron support of being convenient for, through setting up the connecting plate, the connecting plate is fixed with corresponding sensor support or longeron support, specific mode such as can be integrative setting, welding, and the connecting plate is then connected through the fastener with the support mounting panel, makes things convenient for the dismouting to reduce maintenance cost.

In a second aspect, an embodiment of the present application provides a method for testing a connection point of a front bracket of an automobile, including: adjusting the relative height of the collision body and the front bracket of the automobile beam system to be tested, so that the horizontal height of the collision body is higher than that of the front bracket of the automobile beam system to be tested; fixedly connecting a front bracket of the automobile beam system to be tested on a wall body or a trolley, and fixedly connecting a collision body on one of the front brackets of the automobile beam system to be tested, which is not fixedly connected in the wall body or the trolley; the initial speed of the trolley is set, and the trolley runs towards the collision body, so that the collision body collides with the front bracket of the automobile beam system to be tested to simulate the collision of the automobile power assembly and the front bracket of the automobile beam system to be tested.

The method for testing the connection point of the front bracket of the automobile can be used for the device for testing the connection point of the front bracket of the automobile, has the same technical effect as the device for testing the application when the method for testing the application is applied to the device for testing the application, namely truly simulates the bearing condition that the front bracket is extruded by the automobile power assembly when the automobile collides with the front surface, and has the advantages of high simulation precision, strong applicability and repeated testing.

In one possible implementation manner of the present application, the step of fixedly connecting the front bracket of the automobile beam system to be tested to the wall or the trolley, and fixedly connecting the collision body to one of the front brackets of the automobile beam system to be tested, which is not fixedly connected to the wall or the trolley, is as follows: the collision body is fixedly connected to the wall body, and the front bracket of the automobile beam system to be tested is fixedly connected to the trolley.

According to the automobile front bracket connection point testing method, the collision body is fixedly connected to the wall body, the automobile beam system front bracket to be tested is fixedly connected to the trolley, the situation that the automobile and the obstacle are in front collision is simulated, the situation is closer to reality, and the simulation is more real.

Drawings

Fig. 1 is a schematic diagram of connection between a sensor of a connection point testing device for a front bracket of an automobile and a beam system of the automobile to be tested according to an embodiment of the present application;

fig. 2 is an overall view of an automotive front bracket connection point testing device according to an embodiment of the present application;

fig. 3 is a top view of an automotive front bracket connection point testing device according to an embodiment of the present disclosure;

FIG. 4 is a partial cutaway view of an impact assembly of an automotive front bracket attachment point testing apparatus provided in an embodiment of the present application;

Fig. 5 is a schematic diagram of connection between a bracket mounting plate and a trolley of the front bracket connection point testing device of the automobile provided by the embodiment of the application;

FIG. 6 is a three-dimensional view of a support assembly of an automotive front bracket attachment point testing apparatus provided in an embodiment of the present application;

FIG. 7 is a top view of a support assembly of an automotive front bracket attachment point testing apparatus provided in an embodiment of the present application;

FIG. 8 is a left side view of a support assembly of the front bracket attachment point testing apparatus of the automobile provided in the embodiment of the present application in FIG. 7;

fig. 9 is a flowchart of a method for testing a connection point of a front bracket of an automobile according to an embodiment of the present application.

Reference numerals:

1-a trolley; 2-a support assembly; 21-a bracket mounting plate; 211-mounting holes; 212-a stringer attachment hole system; 213-a first pore system; 214-a second pore system; 215-a third pore system; 22-stringer connection; 221-a longitudinal beam welding plate; 222—a stringer bracket; 23-sensor holder set; 231-front fixed point sensor mount; 232-a rear fixed point sensor mount; 233-side fixed point sensor mount; 24-a set of sensor mounting plates; 241—front fixed point sensor mounting plate; 242-a rear fixed point sensor mounting plate; 243-side fixed point sensor mounting plate; 25-connecting plates; 26-a second fastener; 27-a third fastener; 28-fourth fasteners; 29-a cross beam; 3-an impact assembly; 31-an impingement member; 311-impact head; 312-a support; 313-connection; 32-a slider; 33-a first fastener; a 4-sensor group; 41-front fixed point sensor; 411-front fixed point sensor body; 412-front fixed point transition sleeve; 42-a rear fixed point sensor; 421-rear fixed point sensor body; 422-rear fixed point transition sleeve; 43-side fixed point sensor; 431-side fixed point sensor body; 432—side fixed point transition sleeve; 5-securing the barrier; 51-T-shaped sliding grooves; 6-automobile beam system to be tested; 61-front carrier; 611-front fixed point; 612-rear fixed point; 613-side fixation points; 62-a bracket extension; 63—front side member.

Detailed Description

For the purposes, technical solutions and advantages of the embodiments of the present application to be more apparent, the specific technical solutions of the present application will be described in further detail below with reference to the accompanying drawings in the embodiments of the present application. The following examples are illustrative of the present application, but are not intended to limit the scope of the present application.

In the present embodiments, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the embodiments of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

Furthermore, in the embodiments of the present application, the terms "upper," "lower," "left," and "right," etc., are defined with respect to the orientation in which the components in the drawings are schematically disposed, and it should be understood that these directional terms are relative terms, which are used for descriptive and clarity with respect to each other, and which may vary accordingly with respect to the orientation in which the components in the drawings are disposed.

In the embodiments herein, unless explicitly specified and limited otherwise, the term "connected" is to be construed broadly, and for example, "connected" may be either a fixed connection, a removable connection, or an integral body; can be directly connected or indirectly connected through an intermediate medium.

In the present embodiments, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

In the embodiments of the present application, words such as "exemplary" or "such as" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The embodiment of the application provides a front bracket connecting point testing device for simulating the stress condition of an automobile beam system when an automobile collides with an obstacle, collecting related data of the front bracket connecting point of the automobile beam system when the automobile collides, and particularly, for simulating the extrusion of an automobile power assembly to the front bracket of the automobile beam system in the automobile front collision process and collecting the connecting strength and failure parameters of the front bracket connecting point of the automobile beam system in the collision process.

In an example, referring to fig. 1, the automobile beam system 6 to be tested may have various sizes or forms, and includes a front bracket 61, a bracket extension structure 62 and two front stringers 63, where the extension direction of the front bracket 61 is perpendicular to the running direction of the automobile, the bracket extension structure 62 is in a "U" shape, two ends of the bracket extension structure 62 are integrally connected with two ends of the front bracket 61, so that the front bracket 61 and the bracket extension structure 62 enclose a square frame structure, a power assembly of the automobile is disposed in the square frame structure, the two front stringers 63 are located above the bracket extension structure 62, one end of the front stringers 63 far from the front bracket 61 is fixed to the bracket extension structure 62 in a direction perpendicular to the extension direction of the front bracket 61, the front bracket 61 further includes a plurality of connection points for fixing with other body parts of the automobile, specifically including two front fixing points 611, two rear fixing points 612 and two side fixing points 613 symmetrically distributed at two ends of the front stringers 63, and the front fixing points 611 are located at the front and rear 612 and located at the front 612 and rear 612 side fixing points 613 located at the front and rear 612 side fixing points located at the front 612 and rear 612 and outside fixing points located at the front 612 and rear 613 located at the front ends.

Referring to fig. 2 and 3, in an embodiment of the present application, a device for testing a connection point of a front bracket of an automobile includes a trolley 1, where the trolley 1 can move toward a wall at a set speed and collide with the wall, so as to simulate a scene of a frontal collision between the automobile and an obstacle, and the wall is fixed on the ground, has a good bearing capacity, and can provide stable impact or load.

In addition, referring to fig. 2 and 3, the front bracket connection point testing device for the automobile further comprises a supporting component 2 and an impact component 3, wherein the supporting component 2 is provided with a first end for fixedly connecting the trolley 1 or the wall, and a second end of the supporting component 2 is used for fixedly connecting the automobile beam system 6 to be tested; the impact assembly 3 is used for being fixedly connected with the trolley 1 or one of the unconnected support assemblies 2 in the wall, and the impact assembly 3 is used for impacting the automobile beam system in the collision.

The automobile beam system 6 to be tested has different sizes or forms corresponding to different automobiles, the supporting component 2 is used as an intermediate connecting piece, the supporting components 2 with different specifications or styles are matched with the different automobile beam systems 6 to be tested, so that the testing equipment has good applicability, repeated tests can be conveniently conducted by replacing the automobile beam systems 6 to be tested of the same model connected to the supporting component 2, the repeated test requirements are met, the specific automobile beam system 6 to be tested comprises a front bracket 61, a bracket extending structure 62 and other parts, the front longitudinal beam 63 part of the specific automobile beam system 6 to be tested is close to the second end of the supporting component 2 in a test preparation stage, the bracket extending structure 62 part of the automobile beam system 6 to be tested is far away from the second end of the supporting component 2, namely the front bracket 61 is behind the front bracket extending structure 62 of the automobile beam system 6 to be tested in collision.

It should be noted that, the supporting component 2 may be installed on the wall or the trolley 1 according to actual requirements, when the supporting component 2 is installed on the wall, the impact component 3 is correspondingly installed on the trolley 1, and the trolley 1 drives the impact component 3 to move towards the automobile beam system 6 to be tested and generate a collision during testing, so as to simulate the situation of frontal collision when the automobile is stationary; when the supporting component 2 is installed on the trolley 1, the impact component 3 is correspondingly installed on the wall body, and the trolley 1 drives the automobile beam system 6 to be tested to move towards the impact component 3 and collide during testing, so that the situation that the automobile and the obstacle are in front collision is simulated, the installation positions of the supporting component 2 and the impact component 3 are set according to actual testing requirements, the application range of the testing device is widened, and the universality of the testing device is improved.

Furthermore, referring to fig. 2 and 3, the impact assembly 3 has an impact member 31 simulating an automobile power assembly, the impact member 31 protrudes toward the support assembly 2, that is, the impact member 31 protrudes toward the front bracket 61 of the automobile beam system to be tested, specifically, the impact member 31 protrudes toward the front bracket 61 of the automobile beam system to be tested, during testing, the bracket extending structure 62 of the automobile beam system to be tested collides with the wall or the end face of the trolley 1 and deforms accordingly, the impact member 31 collides with and presses the front bracket 61 of the automobile beam system to be tested along with the deformation of the bracket extending structure 62 of the automobile beam system, the process truly simulates an automobile frontal collision, the front part of the automobile body deforms firstly and presses the automobile power assembly located in the front cabin, the process that the automobile power assembly moves toward the front bracket 61 after being pressed, by arranging the impact member 31 protruding toward the front bracket 61 of the automobile beam system to be tested, the test device effectively simulates the bearing sequence of the front end structure of the automobile in the front collision process and the bearing characteristics of the front bracket 61 of the automobile, so that accurate test data are provided, namely, the strength characteristic and failure parameter of the front bracket 61 connection point of the automobile beam system 6 to be tested in the collision process can be used as effective reference data for the whole automobile development and simulation pair standard.

In order to facilitate data collection of the automobile beam system 6 to be tested, referring to fig. 1 and 2, in an embodiment of the present application, the device for testing a connection point of the front bracket of the automobile beam system 6 further includes a sensor, the sensor is disposed at a connection point position of the front bracket 61 of the automobile beam system 6 to be tested, and the sensor is used for collecting data of the connection point of the front bracket 61 of the automobile beam system 6 to be tested in a collision process. The sensor is mainly used for collecting and recording force-bending moment signals of the connecting point of the front bracket 61 of the automobile beam system 6 to be tested in the collision test, the sensor is arranged at the connecting point position of the front bracket 61 of the automobile beam system 6 to be tested, the connecting point of the front bracket 61 of the automobile beam system is used for connecting the front bracket 61 with other automobile body structures and is also the most concentrated stress position of the front bracket 61, and the strength characteristic and failure parameter of the connection of the front bracket 61 are important indexes in the design of the front bracket 61.

On this basis, in order to facilitate connection of the impact member 31 with the trolley 1 or the wall body and ensure the impact effect of the impact member 31 caused by the automobile beam system 6 to be tested, referring to fig. 2, 3 and 4, in one embodiment of the present application, the impact member 31 includes an impact head 311, a supporting portion 312 and a connecting portion 313, the impact head 311 and the connecting portion 313 are respectively fixed at two ends of the supporting portion 312, the impact head 311 extends toward the supporting assembly 2 for simulating an automobile power assembly, and the connecting portion 313 is fixedly connected with one of the trolley 1 or the wall body, to which the supporting assembly 2 is not connected. The impact head 311 in the impact member 31 is used for directly colliding with the automobile beam system 6 to be tested, the connecting part 313 is used for fixing the impact member 31 on the wall body or the trolley 1 so as to ensure the stability of the impact member 31 in the collision process, the supporting part 312 is used for connecting the impact head 311 with the connecting part 313 and increasing the length of the impact member 31, so that the impact head 311 can extend into the supporting component 2, and the front longitudinal beam 63 and the bracket extension structure 62 deformation and the bearing sequence of the bracket body stress of the automobile beam system 6 to be tested are simulated in the collision process.

The impact head 311 may have various shapes, such as a triangular prism, a cylinder, etc., and any shape capable of simulating the contact surface between the automobile power assembly and the front bracket 61 of the automobile beam system 6 to be tested is within the protection scope of the present application, and in order to ensure that the impact head 311 can better simulate the automobile power assembly, referring to fig. 2, 3 and 4, in one embodiment of the present application, the impact head 311 is cylindrical and extends along a horizontal direction, and an extending direction of the impact head 311 is perpendicular to a moving direction of the trolley 1. The impact head 311 extends in the horizontal direction, and the extending direction of the impact head 311 is perpendicular to the moving direction of the trolley 1, so that the impact area of the impact head 311 and the automobile beam system 6 to be tested in the horizontal direction is larger, the front bracket 61 of the automobile beam system 6 to be tested is subjected to uniform impact, the situation that the automobile power assembly is stressed to be extruded towards the front bracket 61 of the automobile beam system 6 to be tested in the front impact process is simulated, and the cylindrical impact head 311 has strong bearing capacity and is more impact-resistant.

In addition, the form of the supporting portion 312 and the connecting portion 313 may be various, and the supporting portion may be, for example: single pole, support frame, i-beam, etc., connection portion such as: in order to save materials and reduce cost on the premise of ensuring the structural strength of the impact member 31, referring to fig. 2, 3 and 4, in one embodiment of the present application, the connection portion 313 is a plate structure, the support portion 312 includes a plurality of rod-shaped structures arranged in parallel, specifically includes four rod-shaped structures, the four rod-shaped structures are distributed at four corners of the connection portion 313, an included angle between the support portion 312 and the connection portion 313 in a horizontal direction is an acute angle, and the connection portion 313 is higher than the impact head 311.

In the above structure, the supporting portion 312 between the connecting portion 313 and the impact head 311 is a frame for supporting, so that less material is required, thereby reducing the cost, and meanwhile, the plurality of rod-shaped structures provide support for the impact head 311, so that the structural strength of the impact member 31 can be ensured, and in addition, the rod-shaped structure of the connecting portion 313 increases the length of the impact member 31, so that the impact head 311 can extend towards the supporting component 2. In the actual collision process, the force applied to the front bracket 61 of the automobile beam system by the automobile beam system is inclined downwards, so that the force applied to the automobile beam system by the automobile beam system is inclined upwards, and the situation is simulated in the test process, namely, the force applied to the impact piece 31 by the automobile beam system to be tested is inclined upwards, in order to enhance the bearing capacity of the impact head 311, the rod-shaped structure of the supporting part 312 is inclined downwards, in particular, the included angle between the supporting part 312 and the connecting part 313 in the horizontal direction is set to be an acute angle, and the connecting part 313 is higher than the impact head 311, so that the direction of the impact force applied to the supporting part by the rod-shaped structure of the supporting part 312 is approximately consistent, the bending moment applied to the rod-shaped structure is smaller, and the rod-shaped structure is not easy to break, thereby improving the bearing capacity of the impact piece 31.

In an alternative implementation, the front bracket connection point testing device for an automobile further includes a fixed barrier 5, referring to fig. 2, 3 and 4, the fixed barrier 5 is used to be fixed with the ground to simulate a wall, the first end of the support assembly 2 is used to connect the trolley 1 or the fixed barrier 5, and the connection portion 313 is fixedly connected with one of the trolley 1 or the fixed barrier 5, to which the support assembly 2 is not connected. The fixed barrier 5 can be used for simulating a wall body, and is firmly fixed on the ground, so that the stability in the collision process can be ensured, the first end of the supporting component 2 can be connected to the trolley 1 or the fixed barrier 5, when the first end of the supporting component 2 is connected with the trolley 1, the impact piece 31 is fixed on the fixed barrier 5, during the test, the trolley 1 carries the automobile beam system 6 to be tested to collide with the impact piece 31 on the fixed barrier 5, the reaction force of the impact piece 31 impacts the automobile beam system 6 to be tested, when the first end of the supporting component 2 is connected with the fixed barrier 5, the impact piece 31 is fixed on the trolley 1, and during the test, the trolley 1 carries the impact piece 31 to collide with the automobile beam system 6 to be tested on the fixed barrier 5, so that the impact piece 31 impacts the automobile beam system 6 to be tested.

In order to enable the impact member 31 to be adjusted in the horizontal direction, so that the impact member 31 can impact the front bracket 61 of the automobile beam system 6 to be tested more accurately, referring to fig. 2, 3 and 4, in one embodiment of the present application, the first end of the support assembly 2 is fixedly connected to the trolley 1, the connecting portion 313 is fixedly connected to the fixed barrier 5, the fixed barrier 5 is provided with a T-shaped chute 51 in the horizontal direction, the T-shaped chute 51 is slidably connected with the slider 32, the connecting portion 313 is fixed to the slider 32 by the first fastener 33, and the first fastener 33 can lock the slider 32 to the fixed barrier 5. The fixed barrier 5 fixed to the connection portion 313 of the impact member 31 has a T-shaped chute 51, the connection portion 313 is connected with a slider 32, and the slider 32 slides in the T-shaped chute 51, so that the position of the impact member 31 in the horizontal direction is adjusted to enable the impact member 31 to face the collision position of the automobile beam system 6 to be tested in the horizontal direction, and the T-shaped chute 51 is provided because it has a limit flange capable of limiting the slider 32, so that the slider 32 can be prevented from being pulled out of the T-shaped chute 51 by a force perpendicular to the fixed barrier 5. The connecting portion 313 is connected with the sliding block 32 through the first fastening piece 33, so that the connecting portion 313 and the sliding block 32 are convenient to assemble and disassemble, specifically, the first fastening piece 33 can be a screw, the first fastening piece 33 passes through the connecting portion 313 along the direction of the vertical fixing barrier 5 and is connected into the sliding block 32 through the opening threads of the T-shaped sliding groove 51, when the first fastening piece 33 is screwed down, the sliding block 32 is gradually close to the connecting portion 313, and as the limit flange of the T-shaped sliding groove 51 is positioned between the sliding block 32 and the connecting portion 313, the limit flange is gradually extruded by the sliding block 32, the friction force between the sliding block 32 and the limit flange of the T-shaped sliding groove 51 is gradually increased, so that the sliding block 32 is prevented from sliding along the extending direction of the T-shaped sliding groove 51, the sliding block 32 is locked in the T-shaped sliding groove 51, namely, the first fastening piece 33 locks and fixes the impact piece 31, the sliding block 32 and the fixing barrier 5, and the convenience of adjusting the position of the impact piece 31 is improved.

In addition, in order to facilitate the height adjustment of the impact member 31 to accommodate various types of automobile beam systems 6 to be tested having different heights, referring to fig. 2, 3 and 4, in one embodiment of the present application, there are a plurality of T-shaped sliding grooves 51, the plurality of T-shaped sliding grooves 51 are uniformly arranged along the vertical direction, and the T-shaped sliding grooves 51 penetrate the fixed barrier 5 along the extending direction thereof. Through offer a plurality of T type spouts 51 on fixed barrier 5, a plurality of spouts are evenly arranged in vertical direction, when the connecting portion 313 of impact piece 31 connects the T type spout 51 when not high, the height of impact piece 31 also changes thereupon, highly adjustable impact piece 31 can adapt to the automobile beam system 6 that awaits measuring of different height, thereby the application scenario of this application testing arrangement has been widened, the universality of this application testing arrangement has been improved, in order to be convenient for impact piece 31 adjusts between the T type spout 51 of different heights, T type spout 51 runs through fixed barrier 5 along its extending direction, during specific adjustment, only need loosen the fastener between connecting portion 313 and the slider 32, make slider 32 can slide in T type spout 51, and slide out from the tip of another T type spout 51 again, thereby change the height of impact piece 31, and adjust the suitable position with impact piece 31 in the horizontal direction, reuse fastener locks connecting portion 313, slider 32 and fixed barrier 5 three.

The number and distribution of the sliders 32 may take various forms according to the projected area and shape of the connecting portion 313 on the fixed barrier 5, and referring to fig. 2, 3 and 4, in one embodiment of the present application, the projection of the connecting portion 313 on the fixed barrier 5 covers three T-shaped sliding grooves 51, four sliders 32, two sliders 32 sliding in the upper T-shaped sliding groove 51 of the three T-shaped sliding grooves 51, and the other two sliding in the lower T-shaped sliding groove 51 of the three T-shaped sliding grooves 51, and four sliders 32 fixed to four corners of the connecting portion 313.

In order to be convenient for with the fixed of supporting component 2 and platform truck 1 or wall body, the position of supporting component 2 is convenient according to actual demand adjustment, refer to fig. 2, fig. 3 and fig. 5, in an embodiment of this application, supporting component 2 includes support mounting panel 21 and longeron connecting portion 22 of vertical setting, it has mounting hole 211 to open on the support mounting panel 21, support mounting panel 21 is fixed with one in platform truck 1 or the wall body through mounting hole 211, specific mounting hole 211 is sixteen altogether, sixteen mounting hole 211 are four in a set of, four mounting hole 211 in a set are square arrangement, four sets of mounting hole 211 distribute in the four corners of support mounting panel 21, every mounting hole 211 all is furnished with second fastener 26 and is used for connecting platform truck 1 or wall body, longeron connecting portion 22 is used for being tested car roof beam system 6 with waiting to test to fix. Through setting up support mounting panel 21 to offer mounting hole 211 on support mounting panel 21, thereby can be convenient with support assembly 2 and platform truck 1 or wall body installation or dismantlement through the fastener, improved the convenience of support assembly 2 installation, and the convenience of support assembly 2 mounted position adjustment, in addition, in order to be convenient for be fixed with the automobile beam system 6 that awaits measuring, still be provided with the longeron connecting portion 22 fixed with support mounting panel 21, will await measuring automobile beam system 6 through the longeron installation portion and fix on support mounting panel 21, and then firmly fix longeron installation portion and platform truck 1 or wall body.

It should be noted that, there may be various manners of fixing the automobile beam system 6 to be tested on the support assembly 2, such as welding, fastening connection, etc., in order to ensure that the automobile beam system 6 to be tested can be firmly fixed with the support assembly 2, referring to fig. 6, 7 and 8, in one embodiment of the present application, the longitudinal beam connecting portion 22 includes a longitudinal beam welding plate 221 and a longitudinal beam bracket 222, and the longitudinal beam welding plate 221 is used for welding and fixing the front longitudinal beam 63 of the automobile beam system 6 to be tested, and the longitudinal beam welding plate 221 and the bracket mounting plate 21 are respectively fixed at two ends of the longitudinal beam bracket 222 in the extending direction. Through setting up longeron welded plate 221, longeron welded plate 221 welds together with the front longitudinal beam 63 of the automobile beam system 6 that awaits measuring, and welded connection intensity is high, need not simultaneously to handle the structure of front longitudinal beam 63 to guaranteed the structural integrity of front longitudinal beam 63, the simulation automobile beam system is better in the effect of front collision in-process force transmission.

To facilitate positioning of the sensor, referring to fig. 6, 7 and 8, in one embodiment of the present application, the support assembly 2 further includes a sensor bracket, a first end of the sensor bracket is fixed to the bracket mounting plate 21, a second end of the sensor bracket extends to a connection point position of the front bracket 61 of the automobile beam system 6 to be tested, and the sensor is fixed to the second end of the sensor bracket and abuts against the connection point position of the front bracket 61 of the automobile beam system 6 to be tested. By arranging the sensor bracket, the first end of the sensor bracket is fixed on the bracket mounting plate 21, and the sensor is fixed at the second end of the sensor bracket, so that the sensor and the bracket mounting plate 21 are relatively fixed, and meanwhile, since the automobile beam system 6 to be tested is fixed on the bracket mounting plate 21 through the longitudinal beam welding plate 221 and the longitudinal beam bracket 222, the sensor and the automobile beam system 6 to be tested are relatively fixed, and the sensor can be easily positioned at the connecting point position of the front bracket 61 of the automobile beam system 6 to be tested by extending the second end of the sensor to the connecting point position of the front bracket 61 of the automobile beam system 6 to be tested.

On this basis, in order to improve the test efficiency and the test precision, referring to fig. 6, 7 and 8, in an embodiment of the present application, a plurality of sensors and sensor holders are provided, and a plurality of sensors are provided in one-to-one correspondence with a plurality of sensor holders. The plurality of sensors can be installed at a plurality of positions to be measured of the automobile beam system 6 to be tested, and data of the plurality of positions to be measured are acquired simultaneously in a collision process, so that the test efficiency is improved, meanwhile, the automobile beam system 6 to be tested is of a symmetrical structure, the data of the opposite positions to be measured in the collision process are supposed to be converged, when the two sensors are positioned at the symmetrical positions to be measured of the automobile beam system 6 to be tested, the test data can be mutually compared, random errors are eliminated, and the test precision is improved. In addition, the sensor support plays a supporting role on the sensor, and simultaneously plays a positioning role on the sensor, and the sensor support corresponds to the sensors one by one through the arrangement of the sensors, so that the sensor support can not affect other sensors when the position of the sensor needs to be adjusted.

Wherein the plurality of sensors form the sensor group 4, the plurality of sensor brackets form the sensor bracket group 23, referring to fig. 6, 7 and 8, the sensor group 4 includes two front fixing point sensors 41, two rear fixing point sensors 42 and two side fixing point sensors 43, the front fixing point sensors 41 are used for measuring the front fixing point 611 of the front bracket 61 of the automobile beam system 6 to be tested, the rear fixing point sensors 42 are used for measuring the rear fixing point 612 of the front bracket 61 of the automobile beam system 6 to be tested, and the side fixing point sensors 43 are used for measuring the side fixing point 613 of the front bracket 61 of the automobile beam system 6 to be tested. The sensor bracket set 23 includes two front fixed point sensor brackets 231, two rear fixed point sensor brackets 232, and two side fixed point sensor brackets 233, the two front fixed point sensor brackets 231 respectively correspond to the two front fixed point sensors 41, the two rear fixed point sensor brackets 232 respectively correspond to the two rear fixed point sensors 42, and the two side fixed point sensor brackets 233 respectively correspond to the two side fixed point sensors 43.

It should be noted that, in one embodiment of the present application, the two front fixed point sensor brackets 231 are bent toward each other at an end far from the bracket mounting plate 21, the bending angle is an obtuse angle, and in order to enhance the strength of the front fixed point sensor brackets 231, a beam 29 is disposed between the two front fixed point sensor brackets 231, the beam 29 is disposed horizontally and parallel to the bracket mounting plate 21, the beam 29 is disposed uniformly with the two front fixed point sensor brackets 231, the rear fixed point sensor bracket 232 is formed by two mutually parallel cylindrical rods, and the side fixed point sensor bracket 233 is also formed by two mutually parallel cylindrical rods.

To facilitate assembly and maintenance of the sensor and the sensor support, referring to fig. 6, 7 and 8, in one embodiment of the present application, a sensor mounting plate is disposed between the sensor and the sensor support, the sensor mounting plate is secured to the sensor support, and the sensor is connected to the sensor mounting plate by a fourth fastener 28. Through setting up the sensor mounting panel, fix sensor mounting panel and sensor support, the sensor then is connected with the sensor mounting panel through fourth fastener 28, is convenient for install and dismantle to make things convenient for the assembly and the maintenance of sensor, reduced the maintenance cost of this device, improved the ease of use of this device.

In one embodiment of the present application, a front fixed point sensor mounting plate 241 is provided between the front fixed point sensor 41 and the front fixed point sensor bracket 231, and the front fixed point sensor mounting plate 241 is a square plate and horizontally disposed, two adjacent sides of the front fixed point sensor mounting plate are fixed to the front fixed point sensor bracket 231, and the front fixed point sensor 41 is fixed to a lower center position of the front fixed point sensor mounting plate 241 by four fourth fasteners 28. The rear fixed point sensor 42 and the rear fixed point sensor holder 232 have a rear fixed point sensor mounting plate 242 therebetween, and the rear fixed point sensor mounting plate 242 is an "L" shaped plate, the vertical outer side of which is fixed to the rear fixed point sensor holder 232, and the horizontal outer side, i.e., the lower side thereof is fixed to the rear fixed point sensor 42 by four fourth fasteners 28. The side fixed point sensor 43 and the side fixed point sensor bracket 233 have a side fixed point sensor mounting plate 243 therebetween, the side fixed point sensor mounting plate 243 is an "L" shaped plate, the vertical outer side thereof is fixed to the side fixed point sensor bracket 233, the horizontal outer side, i.e., the lower side thereof is fixed to the side fixed point sensor 43 by four fourth fasteners 28, the front fixed point sensor mounting plate 241, the rear fixed point sensor mounting plate 242 and the side fixed point sensor mounting plate 243 together form a sensor mounting plate group 24, and in addition, the inner sides of the rear fixed point sensor mounting plate 242 and the side fixed point sensor mounting plate 243 are provided with ribs for enhancing the load bearing capacity.

Since the dimensions of the connection points of the front brackets 61 of the different automobile beams 6 to be tested are not identical, in order to enable the sensor to be adapted to the connection points of the front brackets 61 of the automobile beams 6 to be tested of different dimensions, reference is made to fig. 1, 6, 7 and 8, in an embodiment of the application, the sensor comprises a sensor body and a transition sleeve, the transition sleeve having an external thread, a first end of the transition sleeve being in threaded connection with the sensor body, and a second end of the sensor being in threaded connection with the connection point of the automobile beams 6 to be tested. The sensor body is arranged for collecting and recording force-bending moment signals in the collision process, the transition shaft sleeve is arranged, the transition shaft sleeve can be well connected with the connecting point of the front bracket 61 of the automobile beam system 6 to be tested in an adaptive mode, and can be connected with the sensor body, the strength characteristics and failure parameters of the connecting point of the front bracket 61 of the automobile beam system 6 to be tested are transmitted to the sensor body through the transition shaft sleeve, so that the connecting point of the front bracket 61 of the automobile beam system is adapted under the condition that the sensor is not replaced, the universality of the device is improved, and meanwhile, the cost is lower.

It should be noted that, the transition sleeves corresponding to different connection points may have different forms, and diameters of two ends of the same transition sleeve may be different, referring to fig. 1, 6, 7 and 8, in an embodiment of the present application, the front fixed point sensor 41 includes a front fixed point sensor body and a front fixed point transition sleeve 412, the front fixed point transition sleeve 412 is used to connect with the front fixed point 611 of the front bracket 61 of the automobile beam system 6 to be tested, specifically, the front longitudinal beam 63 of the automobile beam system 6 to be tested shown in fig. 1 is perforated, and the front fixed point transition sleeve 412 is connected with the front fixed point 611 after passing through the hole; the rear fixed point sensor 42 comprises a rear fixed point sensor body and a rear fixed point transition sleeve 422, the rear fixed point transition sleeve 422 being for connection with a rear fixed point 612 of the front bracket 61 of the automobile beam system 6 to be tested; the side fixing point sensor 43 includes a side fixing point sensor body and a side fixing point transition bush 432, and the side fixing point transition bush 432 is used for connection with the side fixing point 613 of the front bracket 61 of the automobile beam system 6 to be tested.

In addition, due to the provision of the transition bush, the connection point of the front bracket 61 of the automobile beam system 6 to be tested can be connected to the corresponding sensor bracket, and the sensor bracket and the longitudinal beam bracket 222 also play a role in supporting the automobile beam system 6 to be tested, wherein the sensor bracket and the longitudinal beam bracket 222 can each have various orientations, for example, referring to fig. 6, 7 and 8, and in one embodiment of the present application, the sensor bracket and the longitudinal beam bracket 222 are each horizontally arranged.

To facilitate assembly and maintenance of the sensor bracket, stringer bracket 222 of the present application, referring to fig. 6, 7 and 8, in one embodiment of the present application, both the sensor bracket and stringer bracket 222 are secured to the bracket mounting plate 21 by a connecting plate 25, the connecting plate 25 being secured to the bracket mounting plate 21 by a third fastener 27. Through setting up connecting plate 25, connecting plate 25 is fixed with corresponding sensor support or longeron support 222, and specific mode such as can be integrative setting, welding, connecting plate 25 and support mounting panel 21 then are connected through third fastener 27, make things convenient for the dismouting to reduce maintenance cost.

It should be noted that, the sizes of the connecting plates 25 corresponding to the different sensor brackets and the longitudinal beam brackets 222 are not consistent, the corresponding bracket mounting plates 21 are provided with corresponding hole systems for fixing the connecting plates 25 according to the actual bearing size, specifically, referring to fig. 5, the bracket mounting plates 21 include longitudinal beam connecting hole systems 212, the longitudinal beam connecting hole systems 212 are divided into two symmetrical groups, each group is provided with four threaded holes in rectangular arrangement, and the longitudinal beam connecting hole systems 212 are used for connecting the bracket mounting plates 21 with the longitudinal beam brackets 222; the bracket mounting plate 21 comprises a first hole system 213, the first hole system 213 is divided into two symmetrical groups, each group is provided with four square threaded holes, and the first hole system 213 is used for connecting the bracket mounting plate 21 with the front connection point 611 and the sensor 41 bracket 231; the bracket mounting plate 21 comprises a second hole system 214, the second hole system 214 is divided into two symmetrical groups, each group is provided with four square threaded holes, and the second hole system 214 is used for connecting the bracket mounting plate 21 with the rear fixed point sensor bracket 232; the bracket mounting plate 21 comprises a third hole system 215, the third hole system 215 is divided into two symmetrical groups, each group is provided with four square threaded holes, and the third hole system 215 is used for connecting the bracket mounting plate 21 with the side fixed point sensor bracket 233;

In addition, the embodiment of the application also provides a method for testing the connection point of the front bracket of the automobile, and referring to fig. 9, the method for testing the connection point of the front bracket of the automobile mainly comprises the following steps:

step S1: adjusting the relative height of the collision body and the front bracket 61 of the automobile beam system 6 to be tested so that the horizontal height of the collision body is higher than that of the front bracket 61 of the automobile beam system 6 to be tested;

step S2: fixedly connecting the front bracket 61 of the automobile beam system 6 to be tested to the wall body or the trolley 1, and fixedly connecting a collision body to one of the front brackets 61 of the automobile beam system 6 to be tested, which is not fixedly connected to the wall body or the trolley 1;

step S3: given an initial speed of the truck 1, it is driven toward the collision body so that the collision body collides with the front bracket 61 of the automobile beam system 6 to be tested to simulate the collision of the automobile power assembly with the front bracket 61 of the automobile beam system 6 to be tested.

The method has the same technical effect as the test device of the application when being applied to the test device of the application, namely, truly simulates the bearing condition that the front bracket 61 is extruded by the automobile power assembly when the automobile collides with the front surface, and has the advantages of high simulation precision, strong applicability and repeated test.

In step S2, the front bracket 61 of the automobile beam system 6 to be tested is fixedly connected to the wall or the trolley 1, and the step of fixedly connecting the collision body to one of the front brackets 61 of the automobile beam system 6 to be tested, which is not fixedly connected to the wall or the trolley 1, comprises the following steps: the collision body is fixedly connected to the wall body, and the front bracket 61 of the automobile beam system 6 to be tested is fixedly connected to the trolley 1.

Through with the collision body fixed connection on the wall body, with the car beam system 6 front bracket 61 fixed connection that awaits measuring on platform truck 1 for the scene that the car that the simulation was gone takes place the frontal collision with the obstacle, more press close to reality, the simulation is also more true.

The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments. The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims

1. An automotive front bracket attachment point testing device, comprising:

a trolley;

the support assembly is provided with a first end used for being fixedly connected with the trolley or the wall body, and a second end used for being fixedly connected with an automobile beam system to be tested;

the impact assembly is fixedly connected with one of the trolley or the wall body, which is not connected with the supporting assembly, and is provided with an impact piece simulating an automobile power assembly, and the impact piece extends towards the supporting assembly;

The sensor is arranged at the position of the connecting point of the front bracket of the automobile beam system to be tested and is used for acquiring data of the connecting point of the front bracket of the automobile beam system to be tested in the collision process;

the support assembly further comprises a sensor support and a vertically arranged support mounting plate, wherein the first end of the sensor support is fixed with the support mounting plate, the second end of the sensor support extends to the position of the connecting point of the front bracket of the automobile beam system to be tested, and the sensor is fixed at the second end of the sensor support and abuts against the position of the connecting point of the front bracket of the automobile beam system to be tested.

2. The device for testing the connection point of the front bracket of the automobile according to claim 1, wherein the impact member comprises an impact head, a supporting portion and a connecting portion, the impact head and the connecting portion are respectively fixed at two ends of the supporting portion, the impact head extends towards the supporting assembly for simulating the power assembly of the automobile, and the connecting portion is fixedly connected with one of the trolley or the wall body, which is not connected with the supporting assembly.

3. The vehicle front bracket connection point testing apparatus according to claim 2, wherein the impact head is cylindrical and extends in a horizontal direction, and the extending direction of the impact head is perpendicular to the moving direction of the carriage.

4. The device for testing the connection point of the front bracket of the automobile according to claim 2, wherein the supporting part comprises a plurality of rod-shaped structures which are arranged in parallel, an included angle between the supporting part and the horizontal direction of the connecting part is an acute angle, and the connecting part is higher than the impact head.

5. The vehicle front bracket connection point testing apparatus of claim 2, further comprising a fixed barrier for securing with the ground to simulate a wall, the first end of the support assembly being adapted to connect to the trolley or the fixed barrier, the connection being fixedly connected to one of the trolley or the fixed barrier to which the support assembly is not connected.

6. The device for testing the connection point of the front bracket of the automobile according to claim 5, wherein the first end of the supporting component is fixedly connected with the trolley, the connecting portion is fixedly connected with the fixed barrier, the fixed barrier is provided with a T-shaped chute in the horizontal direction, a sliding block is slidably connected in the T-shaped chute, the connecting portion is fixed with the sliding block through a fastening piece, and the fastening piece can lock the sliding block with the fixed barrier.

7. The device for testing the connection point of the front bracket of the automobile according to claim 6, wherein a plurality of T-shaped sliding grooves are provided, the plurality of T-shaped sliding grooves are uniformly distributed along the vertical direction, and the T-shaped sliding grooves penetrate through the fixed barrier along the extending direction thereof.

8. The device for testing the connection point of the front bracket of the automobile according to claim 1, wherein the supporting component comprises a longitudinal beam connecting part, the bracket mounting plate is provided with a mounting hole, the bracket mounting plate is fixed with one of the trolley or the wall body through the mounting hole, and the longitudinal beam connecting part is used for being fixed with the automobile beam system to be tested.

9. The automobile front bracket connection point testing device according to claim 8, wherein the side member connection portion includes a side member welding plate and a side member bracket, the side member welding plate is used for welding and fixing with a front side member of the automobile beam system to be tested, and the side member welding plate and the bracket mounting plate are respectively fixed at both ends of the side member bracket in the extending direction.

10. The automobile front bracket connection point testing device according to claim 9, wherein a sensor mounting plate is arranged between the sensor and the sensor bracket, the sensor mounting plate is fixed with the sensor bracket, and the sensor is connected with the sensor mounting plate through a fastener.

11. The device for testing the connection point of the front bracket of the automobile according to claim 9, wherein a plurality of sensors and a plurality of sensor supports are provided, and the plurality of sensors are arranged in one-to-one correspondence with the plurality of sensor supports.

12. The vehicle front bracket attachment point testing device of claim 1, wherein the sensor comprises a sensor body and a transition sleeve, the transition sleeve having external threads, a first end of the transition sleeve being threadably coupled to the sensor body, a second end of the sensor being threadably coupled to the attachment point of the vehicle beam front bracket to be tested.

13. The vehicle front bracket attachment point testing device of claim 9, wherein the sensor bracket and the rail bracket are both secured to the bracket mounting plate by a connecting plate secured to the bracket mounting plate by a fastener.

14. A front bracket attachment point testing method for an automobile, applied to the front bracket attachment point testing device for an automobile of any one of claims 1 to 13, characterized by comprising:

adjusting the relative height of a collision body and a front bracket of the automobile beam system to be tested, so that the horizontal height of the collision body is higher than that of the front bracket of the automobile beam system to be tested;

Fixedly connecting a front bracket of the automobile beam system to be tested on a wall body or a trolley, and fixedly connecting the collision body on one of the front brackets of the automobile beam system to be tested, which is not fixedly connected in the wall body or the trolley;

and giving the initial speed of the trolley, and driving towards the collision body so as to enable the collision body and the front bracket of the automobile beam system to be tested to collide to simulate the collision of the automobile power assembly and the front bracket of the automobile beam system to be tested.

15. The method for testing a connection point of a front bracket of an automobile according to claim 14, wherein the step of fixedly connecting the front bracket of an automobile beam system to be tested to a wall or a dolly, and fixedly connecting the collision body to one of the wall or the dolly, to which the front bracket of the automobile beam system to be tested is not fixedly connected, comprises the steps of:

and fixedly connecting the collision body to the wall body, and fixedly connecting a front bracket of the automobile beam system to be tested to the trolley.