Crushing testing device

Abstract

The utility model discloses a crushing test device, which is suitable for a vehicle body die casting, and comprises an installation platform used for supporting and placing the vehicle body die casting; the restraining assembly is mounted on the mounting platform, and the restraining assembly is at least used for limiting the car body die casting in the Z direction; the loading assembly comprises a loading piece capable of moving in the Z direction, and the loading piece is suitable for being distributed right opposite to the shock absorption tower base portion of the automobile body die casting in the Z direction and used for applying Z-direction acting force to the shock absorption tower base portion. According to the crushing test device, the vehicle body die casting is limited and fixed through the constraint assembly of the mounting platform, and the Z-direction acting force is applied to the shock absorption tower base part of the vehicle body die casting through the loading assembly, so that the crushing test of the shock absorption tower base part can be realized, the stress capacity of the shock absorption tower base part can be investigated, the quality risk can be reduced, and the production efficiency is improved. And mass production of parts is guided.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle component testing, in particular to a crush testing device. Background Art

[0002] Integrated die casting is an innovative manufacturing technology that simplifies the complex structure of the body-in-white, which was originally composed of multiple parts, into one part. With the application and popularization of integrated die casting technology in new energy vehicles, integrated die casting technology has become a key capability for automobile manufacturers to improve mass production capabilities. However, the safety performance and maintenance economy of integrated aluminum castings have always been the focus of car manufacturers and the market.

[0003] For the performance verification of the body-in-white, the traditional testing system starts from the perspective of the whole vehicle, and performs DV verification and regulatory testing before mass production, but does not perform separate vehicle and assembly testing during mass production. New models equipped with one-piece cast aluminum parts use a new one-piece die-casting process. In order to ensure the safety of vehicles and personnel, the whole vehicle needs to be tested for front collision, rear collision, durability, misuse conditions and other performance tests before mass production, and can only be put on the market after meeting the requirements. These tests are all performed on assembled vehicles. There is no ready-made part-level testing method to guide casting design verification and mass production release. In addition, when the production phase rate is high and the production process is unstable, a large number of parts will be scrapped, resulting in quality risks, and there is room for improvement. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a crush test device, which can realize the crush test of the shock tower seat to examine the force bearing capacity of the shock tower seat, reduce quality risks, guide the mass production of parts, improve production efficiency, and achieve quality improvement, efficiency increase and cost reduction.

[0005] According to the crush test device of the embodiment of the utility model, the crush test device is suitable for vehicle body die-castings, and the crush test device includes: a mounting platform, the mounting platform is used to support and place the vehicle body die-casting; a constraint assembly, the constraint assembly is installed on the mounting platform, the constraint assembly is at least used to limit the vehicle body die-casting along the Z direction; a loading assembly, the loading assembly includes a loading member movable along the Z direction, the loading member is suitable for being distributed opposite to the shock tower seat portion of the vehicle body die-casting along the Z direction, and is used to apply a force in the Z direction to the shock tower seat portion.

[0006] According to the crushing test device of the embodiment of the utility model, the body die-casting is limited and fixed by the constraint component of the mounting platform, and the Z-direction force is applied to the shock tower seat of the body die-casting by the loading component, so as to realize the crushing test of the shock tower seat to examine the force-bearing capacity of the shock tower seat, reduce quality risks, guide the mass production of parts, improve production efficiency, and achieve quality improvement, efficiency increase and cost reduction.

[0007] According to the crushing test device of some embodiments of the present invention, the constraint assembly includes a first constraint member, the first constraint member is installed on the upper surface of the mounting platform, and the upper and lower ends of the first constraint member are respectively connected to the mounting platform and the vehicle body die-casting along the Z direction for limiting position.

[0008] According to the crushing test device of some embodiments of the present invention, there are multiple first restraining members, and the multiple first restraining members are distributed and spaced apart along the X direction.

[0009] According to the crushing test device of some embodiments of the present invention, there are three first restraints, namely a front restraint, a middle restraint and a rear restraint, the front restraint is connected along the Z direction between the front part of the subframe of the vehicle body die casting and the mounting platform, the middle restraint is connected along the Z direction between the middle part of the subframe of the vehicle body die casting and the mounting platform, and the rear restraint is connected along the Z direction between the rear part of the subframe of the vehicle body die casting and the mounting platform.

[0010] According to the crushing test device of some embodiments of the present invention, the first restraint members are divided into two groups, and the two groups of the first restraint members are spaced apart along the Y direction and are symmetrically distributed relative to the Y direction.

[0011] According to the crushing test device of some embodiments of the present invention, the constraint assembly includes a second constraint member, the second constraint member is installed on the mounting platform, and the second constraint member is connected to the A-pillar inner plate of the vehicle body die-casting along the Y direction for limiting.

[0012] According to the crushing test device of some embodiments of the present invention, there are two second restraints, the two second restraints are spaced apart and distributed along the Y direction, and the two second restraints are respectively connected to the two A-pillar inner panels of the vehicle body die-casting for limiting positions.

[0013] According to some embodiments of the crushing test device of the present invention, the mounting platform includes a test plate portion and a plurality of support columns, the plurality of support columns are spaced apart and respectively supported vertically on a placement surface, the test plate portion is connected between the plurality of support columns to be spaced apart from the placement surface, the vehicle body die-casting is placed on the test plate portion, the constraint assembly is mounted on the test plate portion, and the loading assembly is placed on the placement surface and is suitable for acting on the shock absorbing tower seat portion of the vehicle body die-casting from the bottom of the test plate portion upward.

[0014] According to the crushing test device of some embodiments of the present invention, the loading assembly also includes a support base and a driving member, the support base is suitable for being supported on the placement surface, the driving member is connected to the placement surface, the lower end of the driving member is connected to the support base, and the upper end of the driving member at least partially extends above the test plate portion, and the loading member is connected to the upper end of the driving member.

[0015] According to the crush testing device of some embodiments of the present invention, the driving member is constructed as a cylinder, and the cylinder is equipped with a sensor, and the sensor is used to detect the loading force applied by the cylinder.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 The structure of the crush test device according to the embodiment of the utility model is shown in FIG. Figure 1 ;

[0019] Figure 2 The structure of the crush test device according to the embodiment of the utility model is shown in FIG. Figure 2 ;

[0020] Figure 3 is a front view of a crush test device according to an embodiment of the utility model;

[0021] Figure 4 is a top view of a crush test device according to an embodiment of the utility model;

[0022] Figure 5 is a side view of a crush test device according to an embodiment of the utility model;

[0023] Figure 6 It is a rear view of the crush testing device according to an embodiment of the utility model.

[0024] Reference numerals:

[0025] Crushing test device 100,

[0026] Mounting platform 1, test plate portion 11, support column 12, first restraint 21, front restraint 211, middle restraint 212, rear restraint 213, second restraint 22, loading assembly 3, loading member 31, driving member 32, support seat body 33, sensor 34, vehicle body die-casting 4, shock tower seat portion 41, subframe front portion 42, subframe middle portion 43, subframe rear portion 44, A-pillar inner plate portion 45. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] Unless otherwise specified, the front-to-back direction in the present application is the longitudinal direction of the vehicle, that is, the X direction; the left-right direction is the lateral direction of the vehicle, that is, the Y direction; and the up-down direction is the vertical direction of the vehicle, that is, the Z direction.

[0031] Reference below Figure 1-Figure 6 The crushing test device 100 according to the embodiment of the utility model is described. By fixing the vehicle body die-casting 4 on the mounting platform 1 and then applying a Z-direction force to the shock tower seat 41 of the vehicle body die-casting 4 through the loading assembly 3, the shock tower seat 41 can be crushed to examine the force-bearing capacity of the shock tower seat 41, thereby reducing quality risks, and the testing method is simple and reliable.

[0032] like Figure 1-Figure 6 As shown, according to an embodiment of the present invention, a crush test device 100 is applicable to a vehicle body die casting 4 , and the crush test device 100 includes: a mounting platform 1 , a constraint assembly and a loading assembly 3 .

[0033] The mounting platform 1 is used to support and place the vehicle body die-casting 4, and the constraint component is installed on the mounting platform 1. The constraint component is at least used to limit the vehicle body die-casting 4 along the Z direction. That is to say, the vehicle body die-casting 4 is placed on the mounting platform 1, and the vehicle body die-casting 4 is limited in at least one direction by the constraint component on the mounting platform 1, so that the vehicle body die-casting 4 can be fixed.

[0034] Specifically, the mounting platform 1 can be constructed as a mounting plate, which is used to place the vehicle body die-casting 4. The constraint assembly is connected to the mounting platform 1, and the two can be detachably connected by connecting bolts and other connecting parts. There can be multiple constraint assemblies, and multiple constraint assemblies detachably connect the vehicle body die-casting 4 to the mounting platform 1. Multiple constraint assemblies limit the connection of the vehicle body die-casting 4 along the Z direction, and can also limit the connection of the vehicle body die-casting 4 along the X direction and the Y direction at the same time, so that the vehicle body die-casting 4 is respectively connected and fixed to the mounting platform 1 in the X direction, the Y direction and the Z direction, thereby improving the installation strength of the vehicle body die-casting 4, ensuring that the vehicle body die-casting 4 does not move during testing, and facilitating accurate measurement of the stress and deformation of the vehicle body die-casting 4 itself, reducing the influence of unreliable connection of the vehicle body die-casting 4 on the measurement results, and its connection method is simple, easy to disassemble and assemble, and reduces the detection cost.

[0035] The loading assembly 3 includes a loading member 31 movable along the Z direction. The loading member 31 is suitable for being distributed opposite to the shock absorbing tower seat portion 41 of the vehicle body die-casting 4 along the Z direction, and is used to apply a force in the Z direction to the shock absorbing tower seat portion 41. That is to say, a force in the Z direction is applied to the shock absorbing tower seat portion 41 of the vehicle body die-casting 4 by the loading member 31, so as to realize an impact on the shock absorbing tower seat portion 41, and the force deformation condition at the shock absorbing tower seat portion 41 can be detected.

[0036] Specifically, the loading assembly 3 includes a loading member 31, which is arranged opposite to the shock tower seat 41 of the vehicle body die casting 4 in the Z direction, and the loading member 31 is located below the shock tower seat 41, wherein the shock tower seat 41 is a fixed end, and the loading member 31 can move in the Z direction relative to the shock tower seat 41, and the loading member 31 applies a force to the shock tower seat 41 when it moves toward the shock tower seat 41, and removes the force applied to the loading member 31 when it moves away from the shock tower seat 41. Further, during the inspection, the vehicle body die casting 4 is fixedly connected to the mounting platform 1 through the constraint assembly, and the loading member 31 moves toward the shock tower seat 41 to apply a Z-direction force to the shock tower seat 41, which can be equivalent to the impact of the ground on the shock tower seat 41, so as to detect the stress, deformation and cracking of the shock tower seat 41. After the inspection is completed, the loading member 31 moves in the opposite direction to remove the force on the shock tower seat 41, and the inspection is completed.

[0037] Among them, the body die-casting 4 is a large one-piece aluminum casting, and its one-piece die-casting process parameters are many and the control is complex. The parts produced in batches need to pass some testing methods to guide the release of the parts and improve the production efficiency and production quality of the one-piece die-casting. The body die-casting 4 can be a variety of body structures, such as the front cabin structure, the rear floor structure, etc. The body die-casting 4 is fixed on the mounting platform 1 of the crushing test device 100, and the Z-direction loading force is applied through the loading component 3, which can simulate the stress situation when the vehicle passes through a complex road, and can detect the stress capacity and deformation of the body die-casting 4 to guide DV verification and the release of mass-produced parts, thereby reducing the scrap rate of production. The crushing test device 100 can perform crushing tests on different body structures, that is, to achieve decomposition crushing tests on the body structure. The overall detection process is simple and reliable, and has a wide range of applications.

[0038] According to the crushing test device 100 of the embodiment of the utility model, the vehicle body die-casting 4 is limited and fixed by the constraint component of the mounting platform 1, and the Z-direction force is applied to the shock tower seat 41 of the vehicle body die-casting 4 by the loading component 3, so as to realize the crushing test of the shock tower seat 41 to examine the force-bearing capacity of the shock tower seat 41, reduce quality risks, guide mass production of parts, improve production efficiency, and achieve quality improvement, efficiency increase and cost reduction.

[0039] In some embodiments, the restraint assembly includes a first restraint member 21, which is mounted on the upper surface of the mounting platform 1, and the upper and lower ends of the first restraint member 21 are respectively connected to the mounting platform 1 and the vehicle body die casting 4 along the Z direction for limiting position.

[0040] Specifically, the first restraint member 21 is used to connect the vehicle body die casting 4 to the mounting platform 1, such as Figure 1-Figure 2As shown, the vehicle body die-casting 4 is located above the mounting platform 1, the first restraint 21 is located between the mounting platform 1 and the vehicle body die-casting 4, and the lower end of the first restraint 21 is connected to the upper surface of the mounting platform 1, which can be fixed by connecting bolts, and the upper end of the first restraint 21 is connected to the lower surface of the vehicle body die-casting 4, which can be fixed by connecting bolts. The connection method is simple and easy to disassemble and assemble.

[0041] In this way, the vehicle body die-casting 4 can be connected and fixed to the mounting platform 1 along the Z direction, and the movement of the vehicle body die-casting 4 in the Z direction can be limited, so that when the loader 31 loads the vehicle body die-casting 4 along the Z direction, the vehicle body die-casting 4 itself does not move, and the actual stress and deformation state of the vehicle body die-casting 4 can be detected, thereby improving the accuracy of the crush test and the production quality of the vehicle body die-casting 4.

[0042] In some embodiments, there are multiple first restraining members 21, and the multiple first restraining members 21 are spaced apart and distributed along the X direction. Specifically, the multiple first restraining members 21 are spaced apart and distributed along one direction, such as Figure 1 and Figure 2 As shown, a plurality of first restraints 21 are spaced apart along the X direction, and are respectively connected to the mounting platform 1 and the vehicle body die-casting 4 in the X direction, wherein the first restraint 21 can be constructed as a mounting bracket, and the mounting bracket includes an upper and lower connecting surfaces, an upper connecting surface is provided with an upper connecting hole, and a lower connecting surface is provided with a lower connecting hole, and is connected to the vehicle body die-casting 4 through the upper connecting hole, and is connected to the mounting platform 1 through the lower connecting hole. In this way, the vehicle body die-casting 4 can be fixedly supported on the mounting platform 1, and the connection method is simple and reliable, and the structure of the first restraint 21 is not limited to that described in the present embodiment, and other standard parts can also be selected directly as connecting parts, or other connection methods can be adopted to achieve the connection between the vehicle body die-casting 4 and the mounting platform 1.

[0043] Therefore, by setting multiple first constraints 21 to connect the body die-casting 4 to the mounting platform 1, the body die-casting 4 and the mounting platform 1 can be limited in the X direction, and the two can also be limited in the Y direction, so that the position of the body die-casting 4 is reliably fixed and will not be offset, thereby reducing the inaccuracy of detection.

[0044] In some embodiments, there are three first restraints 21, namely a front restraint 211, a middle restraint 212 and a rear restraint 213. The front restraint 211 is connected between the front part 42 of the subframe of the vehicle body die-casting 4 and the mounting platform 1 along the Z direction, the middle restraint 212 is connected between the middle part 43 of the subframe of the vehicle body die-casting 4 and the mounting platform 1 along the Z direction, and the rear restraint 213 is connected between the rear part 44 of the subframe of the vehicle body die-casting 4 and the mounting platform 1 along the Z direction. That is to say, the three first restraints 21 respectively connect and fix the vehicle body die-casting 4 to the mounting platform 1 along the Z direction, so that the vehicle body die-casting 4 can be limitedly connected along the Z direction at different positions.

[0045] Specifically, Figure 3 and Figure 6 As shown, the body die casting 4 has three connecting parts, namely, the front part 42 of the sub-frame, the middle part 43 of the sub-frame and the rear part 44 of the sub-frame, and the three first restraints 21 are respectively distributed in one-to-one correspondence with the three connecting parts, and the three first restraints are respectively the front restraint 211, the middle restraint 212 and the rear restraint 213. The heights of the front restraint 211, the middle restraint 212 and the rear restraint 213 in the Z direction are not all the same, and the heights of the three are matched with the body die casting 4, wherein the mounting platform 1 is provided with three mounting parts, the front restraint 211, the middle restraint 212 and the rear restraint 213. The lower ends of the restraint 212 and the rear restraint 213 are respectively connected to the three mounting parts of the mounting platform 1, and the upper end of the front restraint 211 is connected to the front part 42 of the subframe, the middle restraint 212 is connected to the middle part 43 of the subframe, and the rear restraint 213 is connected to the rear part 44 of the subframe. Therefore, the vehicle body die-casting 4 is connected to the mounting platform 1 along the Z direction through the three first restraints 21, and the movement of the vehicle body die-casting 4 in the Z direction can be limited at the front, middle and rear respectively, and the movement of the vehicle body die-casting 4 in the X direction can be limited, thereby realizing the limit connection in two directions, and its limit reliability is higher.

[0046] The structures of the three first restraining members 21 may be the same or different, and the number of the first restraining members 21 may be two, four, etc., which can be flexibly selected according to actual structural characteristics and actual needs.

[0047] In some embodiments, there are two groups of first restraining members 21 , and the two groups of first restraining members 21 are spaced apart along the Y direction and are symmetrically distributed relative to the Y direction.

[0048] Specifically, Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, the body die casting 4 has two shock tower seats 41, which are spaced and symmetrically distributed along the Y direction, that is, the overall structure of the body die casting 4 is symmetrically distributed along the left and right directions. Correspondingly, there are two groups of first restraints 21, which are spaced and distributed along the Y direction and symmetrically distributed relative to the center line of the Y direction. In this way, each group of multiple first restraints 21 are spaced and distributed along the Y direction, and are respectively connected to the mounting platform 1 along the Y direction, which can limit the movement of the body die casting 4 in the Y direction and the Z direction, and realize the limit connection in two directions, and its limit reliability is higher. The two groups of first restraints 21 are symmetrically arranged, which can make the overall structure symmetrical, and the processing and later installation are simpler and more convenient, which improves the detection efficiency and reduces the production cost.

[0049] In some embodiments, the restraint assembly includes a second restraint member 22 , which is mounted on the mounting platform 1 , and the second restraint member 22 is connected and limited to the A-pillar inner plate 45 of the vehicle body die casting 4 along the Y direction.

[0050] Specifically, the second restraint member 22 is used to connect the vehicle body die casting 4 to the mounting platform 1, such as Figure 1-Figure 2 As shown, the second restraint 22 is located between the mounting platform 1 and the vehicle body die casting 4, and the lower end of the second restraint 22 is connected to the upper surface of the mounting platform 1, which can be connected and fixed by connecting bolts, and the upper end of the second restraint 22 is connected to the A-pillar inner plate 45 of the vehicle body die casting 4, which can be connected and fixed by connecting bolts, and the connection method is simple and easy to disassemble and assemble. Among them, the A-pillar inner plate 45 extends vertically, and the second restraint 22 can be constructed as a connecting column, the lower end of the connecting column is connected to the upper surface of the mounting platform 1, and the upper area of ​​the connecting column is connected and fixed to the A-pillar inner plate 45.

[0051] The second restraint 22 is arranged on the lateral outside of the first restraint 21. The A-pillar inner plate 45 is connected along the Y direction through the second restraint 22 to limit the movement of the vehicle body die-casting 4 in the Y direction, and the A-pillar inner plate 45 can be connected and fixed with the mounting platform 1 along the Z direction to limit the movement of the vehicle body die-casting 4 in the Z direction. The vehicle body die-casting 4 has connection limits in the above two directions, and its connection reliability is higher, which effectively improves the accuracy of the crushing test.

[0052] In some embodiments, there are two second restraining members 22 , which are spaced apart and distributed along the Y direction, and the two second restraining members 22 are respectively connected to the two A-pillar inner panels 45 of the vehicle body die casting 4 for limiting positions.

[0053] Specifically, the second restraint 22 is located at the rear side of the plurality of first restraints 21, and the A-pillar inner plate 45 is located at the rear side of the sub-frame rear portion 44, so that the rear end of the vehicle body die casting 4 is connected and fixed by the second restraint 22. Figure 1 and Figure 2As shown, there are two A-pillar inner plates 45 of the body die-casting 4, and the two A-pillar inner plates 45 are spaced and symmetrically distributed along the Y direction. Correspondingly, there are two second restraints 22, and the two second restraints 22 are spaced and distributed along the Y direction, and are symmetrically distributed relative to the center line of the Y direction, and the spacing between the two second restraints 22 in the Y direction is greater than the spacing between the multiple first restraints 21 in the Y direction. In this way, the two second restraints 22 respectively connect the two A-pillar inner plates 45 to the mounting platform 1, which can limit the movement of the body die-casting 4 in the Y direction and the Z direction, and realize the limit connection in two directions, and its limit reliability is higher. The two second restraints 22 are symmetrically arranged, which can make the overall structure symmetrical, and the processing and later installation are simpler and more convenient, which improves the detection efficiency and reduces the production cost.

[0054] In some embodiments, the mounting platform 1 includes a test plate portion 11 and a plurality of support columns 12, the plurality of support columns 12 are spaced apart and respectively supported vertically on a placement surface, the test plate portion 11 is connected between the plurality of support columns 12 to be spaced apart from the placement surface, the vehicle body die-casting 4 is placed on the test plate portion 11, and the constraint assembly is installed on the test plate portion 11.

[0055] Specifically, the test plate portion 11 is used to connect the vehicle body die casting 4, and the support column 12 is used to connect with the test plate portion 11 to separate the test plate portion 11 from the placement surface, wherein the test plate portion 11 can be constructed as a square flat plate structure, such as Figure 1 and Figure 2 As shown, there are four support columns 12, and the four support columns 12 extend vertically. The four support columns 12 are spaced apart to form an installation space for installing the test plate part 11, and the four support columns 12 are vertically supported on the placement surface, and can be detachably connected to the placement surface by connecting bolts and other connecting parts. In actual design, connecting columns are connected in sequence between the four support columns 12, and the test plate part 11 is connected to multiple connecting columns, or the test plate part 11 can be directly connected to the four support columns 12, and the four support columns 12 are vertically provided with multiple adjustment holes, which can adjust the vertical height of the connecting columns relative to the placement surface, and the height of the test plate part 11 relative to the placement surface, and the vehicle body die-casting 4 is placed above the test plate part 11, and the constraint assembly is detachably connected to the upper surface of the test plate part 11, wherein the placement surface can be the ground or other platform.

[0056] The loading assembly 3 is placed on the placement surface and is suitable for acting on the shock absorber tower seat part 41 of the vehicle body die-casting 4 from the bottom of the test plate part 11 upward, so that the loading assembly 3 can load the shock absorber tower seat part 41 in Z direction and realize the force deformation detection of the shock absorber tower seat part 41.

[0057] Specifically, Figure 1 and Figure 2As shown, the loading assembly 3 is located on the lateral outer side relative to the vehicle body die casting 4, and the test plate portion 11 is provided with an escape space on the side close to the loading assembly 3 to avoid the loading assembly 3. The loading assembly 3 can extend vertically, and the lower end of the loading assembly 3 is placed on the placement surface, as shown in FIG. Figure 3 and Figure 6 As shown, part of the structure of the loading assembly 3 is located below the test plate portion 11, whereby the loading assembly 3 moves upward from the bottom of the test plate portion 11 to squeeze the shock tower seat portion 41, thereby realizing the force exerted by the loading assembly 3 on the shock tower seat portion 41 of the vehicle body die-casting 4, and its simulated Z-direction impact load is consistent with the impact on the vehicle body chassis during driving, so as to detect the actual deformation capacity of the shock tower seat portion 41.

[0058] Therefore, through the above arrangement, the mounting platform 1 has a simple structure and a firm and reliable connection, which is beneficial to the stress crushing test of the vehicle body die casting 4 .

[0059] In some embodiments, the loading assembly 3 also includes a support base body 33 and a driving member 32, the support base body 33 is suitable for being supported on a placement surface, the driving member 32 is connected to the placement surface, the lower end of the driving member 32 is connected to the support base body 33, and the upper end of the driving member 32 at least partially extends above the test plate portion 11, and the loading member 31 is connected to the upper end of the driving member 32.

[0060] Specifically, the support seat 33 is a structural fixing member of the loading assembly 3, and the driving member 32 is a power member of the loading assembly 3. Figure 1-Figure 3 and Figure 5-Figure 6 As shown, the driving member 32 is connected to the placement surface, and the support seat body 33 is connected to the lower end of the driving member 32. The connection method can be a bolt connection. The bottom of the support seat body 33 is supported on the placement surface, and the driving member 32 can be supported and connected to the placement surface, which can enhance the installation strength of the driving member 32. The upper end of the driving member 32 at least partially extends above the test plate portion 11, and the loading member 31 is detachably connected to the upper end of the driving member 32, that is, the loading member 31 is located above the test plate portion 11, and the loading member 31 can be constructed as a loading head. The loading head is provided with a plane near the shock absorbing tower seat portion 41, and the loading head is in contact with the shock absorbing tower seat portion 41 with the plane. When the driving member 32 drives the loading head to apply a force to the shock absorbing tower seat portion 41, the force can act on the lower surface of the shock absorbing tower seat portion 41, so that the force range of the shock absorbing tower seat portion 41 is increased, and the force deformation capacity of the shock absorbing tower seat portion 41 is more comprehensively detected.

[0061] Among them, Figure 3 and Figure 6 As shown, the lower end of the driving member 32 forms an installation angle with the placement surface, and the upper surface of the support seat body 33 forms an angle so that the driving member 32 applies a positive loading force toward the shock absorbing tower seat portion 41, and the installation angle between the driving member 32 and the placement surface can change with the shock absorbing tower seat portion 41, and is not limited to what is described in this embodiment.

[0062] In some embodiments, the driving member 32 is constructed as a cylinder, and the cylinder is equipped with a sensor 34. The sensor 34 is used to detect the loading force applied by the cylinder. That is, the loading force of the cylinder on the vehicle body die-casting 4 can be detected by the sensor 34, and the deformation capacity of the vehicle body die-casting 4 under the corresponding loading force can be obtained.

[0063] Specifically, the driving member 32 is constructed as a cylinder, which has a linear motion function. The cylinder is equipped with a sensor 34 for detecting the thrust of the cylinder. Figure 1 and Figure 2 As shown, the sensor 34 is located between the oil cylinder and the loading member 31, and the loading member 31 is detachably connected to the piston rod of the oil cylinder. During the detection, the oil cylinder drives the loading member 31 to move linearly and move along the Z direction toward the shock tower seat 41 of the body die casting 4, applying a Z-direction loading force to the shock tower seat 41, and the sensor 34 collects and feedbacks the stress state, and transmits it to other control modules such as computers in the form of signals. The computer is used to realize process control and collect real-time force values, test the stress conditions of the bearing in the area of ​​the shock tower seat 41, obtain the force-displacement curve of the shock tower seat 41 when stressed, examine its deformation degree and cracking when subjected to a certain force value, and evaluate the performance of the integrated die casting. There are two groups of loading components 3 on the lateral sides of the body die casting 4, and the shock tower seat 41 on the lateral sides of the body die casting 4 can be tested for stress and durability at the same time.

[0064] Among them, the driving member 32 can also be constructed as other loading methods that can meet the loading force value and linear loading, such as motor servo control loading. The loading methods are diverse and can be flexibly selected. And the crushing test device 100 in this embodiment can perform a crushing test on the front cabin shock absorber tower seat 41, and can perform a crushing test on the rear floor shock absorber tower seat 41. Its mounting platform 1 needs to correspond to the test part, that is, only the loading and restraint tooling of the part needs to be replaced. In addition, by simulating the durability test of the whole vehicle, changing the loading method to road spectrum waveform loading, or equivalent sine, cosine and other waveform loading, part-level durability testing can be performed.

[0065] And the connection limiting method of the vehicle body die-casting 4 is not limited to that described in the present embodiment, and reference may be made to the stress points and hard points where the vehicle body and chassis are connected at the front cabin and the rear floor, such as the subframe mounting point, the battery pack mounting point, the A-pillar connection point, the longitudinal beam end face, etc. These important connection points can be converted into connection limiting points of the vehicle body die-casting 4, and a test installation platform 1 can be made and fixed on the installation platform 1 to complete the test.

[0066] It should also be noted that before a vehicle is launched on the market, the OEM needs to test the ultimate ability of the vehicle chassis to withstand complex working conditions and examine the stress performance of the vehicle when passing through complex roads: on the one hand, the maintenance economy is considered, that is, whether the shock tower seat 41 of the vehicle body die-casting 4 can withstand the reaction force of the first-order misuse condition in the chassis abuse condition test and the deformation does not exceed 3mm, and evaluate whether the vehicle can be reassembled and repaired after disassembly; on the other hand, the ultimate stress-bearing capacity of the shock tower seat 41 of the vehicle body die-casting 4 is examined to verify whether the tower seat cracks when subjected to the second-order misuse load.

[0067] In addition, the front cabin and rear floor manufactured by the new one-piece die-casting process are both equipped with a wheel arch tower seat structure, which is the key area for transmitting the reaction force of the wheel to the vehicle body. Cracking of the shock absorber tower seat 41 may lead to the replacement of the entire front cabin and rear floor assembly, or even the scrapping of the entire unit. At the same time, the production cycle of a front cabin produced by the one-piece die-casting process is less than 120s, and the production efficiency is high. If the process is unstable, a large number of parts will be scrapped. The crushing test device 100 of this embodiment fixes the vehicle body die-casting 4 to the mounting platform 1 through multiple first restraints 21 and two second restraints 22, tests whether the vehicle body die-casting 4 withstands the impact of chassis abuse conditions, guides the mass production of parts, reduces quality risks, and improves production efficiency. Moreover, this crushing test device 100 can also be applied to the performance testing of the front cabin assembly and the rear floor assembly that are not equipped with one-piece die-castings, and has a wide range of applications.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A crush test device, characterized in that: The crush test device is suitable for vehicle body die castings, and the crush test device comprises: A mounting platform, the mounting platform is used to support and place the vehicle body die casting; A constraint component, the constraint component is installed on the mounting platform, and the constraint component is at least used to limit the body die casting along the Z direction; A loading assembly, the loading assembly comprising a loading member movable along the Z direction, the loading member being adapted to be distributed opposite to the shock tower seat portion of the vehicle body die casting along the Z direction, and being used to apply a force in the Z direction to the shock tower seat portion.

2. The crush test device according to claim 1, characterized in that: The restraint assembly includes a first restraint member, which is mounted on the upper surface of the mounting platform, and the upper and lower ends of the first restraint member are respectively connected to the mounting platform and the vehicle body die casting along the Z direction for limiting position.

3. The crush test device according to claim 2, characterized in that: There are a plurality of first restraining members, and the plurality of first restraining members are spaced apart and distributed along the X direction.

4. The crush test device according to claim 2, characterized in that: There are three first restraints, namely a front restraint, a middle restraint and a rear restraint. The front restraint is connected between the front part of the subframe of the vehicle body die casting and the mounting platform along the Z direction, the middle restraint is connected between the middle part of the subframe of the vehicle body die casting and the mounting platform along the Z direction, and the rear restraint is connected between the rear part of the subframe of the vehicle body die casting and the mounting platform along the Z direction.

5. The crush test device according to claim 2, characterized in that: The first restraining members are divided into two groups, and the two groups of the first restraining members are spaced apart along the Y direction and are symmetrically distributed relative to the Y direction.

6. The crush test device according to claim 1, characterized in that: The restraint assembly includes a second restraint member, which is mounted on the mounting platform, and the second restraint member is connected and limited along the Y direction with the A-pillar inner plate of the vehicle body die casting.

7. The crush test device according to claim 6, characterized in that: There are two second restraining members, which are spaced apart and distributed along the Y direction, and are respectively connected to two A-pillar inner plates of the vehicle body die casting to limit positions.

8. The crush test device according to any one of claims 1 to 7, characterized in that: The mounting platform includes a test plate portion and a plurality of support columns, wherein the plurality of support columns are spaced apart and respectively supported vertically on a placement surface, the test plate portion is connected between the plurality of support columns to be spaced apart from the placement surface, the vehicle body die-casting is placed on the test plate portion, the constraint assembly is mounted on the test plate portion, and the loading assembly is placed on the placement surface and is suitable for acting on a shock absorbing tower seat portion of the vehicle body die-casting from the bottom of the test plate portion upward.

9. The crush test device according to claim 8, characterized in that: The loading assembly also includes a support base body and a driving member, the support base body is suitable for being supported on the placement surface, the driving member is connected to the placement surface, the lower end of the driving member is connected to the support base body, and the upper end of the driving member at least partially extends above the test plate portion, and the loading member is connected to the upper end of the driving member.

10. The crush test device according to claim 9, characterized in that: The driving member is configured as a cylinder, and a sensor is installed on the cylinder. The sensor is used to detect the loading force applied by the cylinder.

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