Strength testing device

Abstract

This utility model discloses a strength testing device, including a fixing fixture, a first force sensor, and a second force sensor. The fixing fixture is used to fix the test piece, the first force sensor is used to measure the load on the test piece in a first direction, and the second force sensor is connected to a force application device to measure the load on the test piece in a second direction. The first and second directions intersect, and the fixing fixture is disposed within the angle region between the first and second directions. This strength testing device can perform crash tests on subframes and other test pieces, and can simultaneously acquire loads in both the X and Y directions during the test, thereby providing effective data support for subsequent vehicle design verification.

Description

Technical Field

[0001] This utility model relates to the field of vehicle testing technology, specifically to a strength testing device. Background Technology

[0002] The subframe can be viewed as the skeleton of the front and rear axles, and is a component of them. In use, the subframe primarily supports the front and rear axles and suspension. In recent years, with increasingly stringent requirements for vehicle collision tests, the subframe, as a key structural component in collision scenarios, directly impacts the overall collision performance of the vehicle.

[0003] To verify the structural strength of the subframe and facilitate overall structural optimization design, crash tests are required during the vehicle design process to determine the subframe's structural path strength and weak points. However, existing technologies lack dedicated devices or equipment for subframe crash testing. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] To this end, this utility model provides a strength testing device that can perform collision tests on subframes and other test components, and can simultaneously acquire loads in both the X and Y directions during the test, thereby providing effective data support for subsequent vehicle design verification.

[0006] The strength testing device of this utility model embodiment includes:

[0007] Fixtures are used to hold the test piece in place.

[0008] A first force sensor is used to measure the load on the test piece in a first direction;

[0009] The second force sensor, connected to the force application device, is used to measure the load on the test piece in the second direction;

[0010] The first direction and the second direction intersect;

[0011] The fixing fixture is located within the angle region between the first direction and the second direction.

[0012] In some embodiments, the force-applying device includes:

[0013] An extrusion head is used to apply a load to the test piece, and a first force sensor and a second force sensor are used to measure the load value applied by the extrusion head to the test piece.

[0014] A driver, connected to the extrusion head and used to drive the extrusion head to apply a load to the test piece.

[0015] In some embodiments, including:

[0016] A first measuring fixture, wherein the extrusion head is slidably assembled with the first measuring fixture in the second direction;

[0017] A second measuring fixture, wherein the driver is connected between the second measuring fixture and the extrusion head.

[0018] In some embodiments, a base is included, the fixing fixture is disposed on the base, the first measuring fixture is disposed on the base or on the side of the base, and the second measuring fixture is disposed on the base.

[0019] In some embodiments, at least one of the fixing fixture, the first measuring fixture, and the second measuring fixture is adjustable relative to the base.

[0020] In some embodiments, the base is provided with a plurality of mounting holes, and the fixing fixture and the second measuring fixture are detachably assembled into the mounting holes of the base by means of fasteners.

[0021] In some embodiments, the fixing fixture includes:

[0022] The first plate is detachably mounted on the base;

[0023] Multiple first supports are provided on the first plate and arranged at intervals along the circumference of the first plate. The first supports are used to fix the test piece.

[0024] In some embodiments, the first measuring fixture includes:

[0025] The second support is disposed on the base or installed on the ground;

[0026] The device includes a fixed part and a movable part. The fixed part is located on the second bracket, and the movable part is slidably assembled on the fixed part. The extrusion head is connected to the movable part.

[0027] In some embodiments, one of the fixed part and the movable part is provided with a slide rail, and the other part is provided with a slide groove, wherein the slide rail slides and engages within the slide groove.

[0028] In some embodiments, the second measuring fixture includes:

[0029] The second plate is detachably mounted to the base;

[0030] The third bracket is mounted on the second plate. One end of the driver is rotatably connected to the third bracket, and the other end of the driver is connected to the second force sensor.

[0031] In some embodiments, the end of the extrusion head is provided with a first ear plate, and the second force sensor is rotatably assembled with the first ear plate;

[0032] And / or, the third bracket is provided with a second ear plate, and the driver is rotatably assembled with the second ear plate.

[0033] In some embodiments, the third support includes:

[0034] A base plate, which is connected to the second plate;

[0035] A vertical plate, which is connected to the base plate, and a driver connected to the vertical plate;

[0036] At least two inclined plates are provided in the angled area formed by the base plate and the upright plate, and at least two of the inclined plates are located on the side of the upright plate away from the driver.

[0037] Beneficial effects: The strength testing device of this utility model embodiment can realize the collision test of the subframe and other test parts, and can simultaneously acquire the load in both X and Y directions during the test, thereby providing effective data support for subsequent vehicle design verification. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the overall structure of the strength testing device according to an embodiment of the present invention.

[0039] Figure label:

[0040] 1-Fixed fixture; 11-First plate; 12-First support;

[0041] 2-Test piece; 3-First force sensor; 4-Second force sensor;

[0042] 5-Force application device; 51-Extrusion head; 511-First ear plate; 52-Driver;

[0043] 6-First measuring fixture; 61-Second support; 62-Fixed part; 63-Modible part;

[0044] 7-Second measuring fixture; 71-Second plate; 72-Third support; 721-Second ear plate; 722-Base plate; 723-Vertical plate; 724-Inclined plate;

[0045] 8-Base; 81-Mounting hole. Detailed Implementation

[0046] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0047] like Figure 1 As shown, the strength testing device of this utility model embodiment includes a fixed fixture 1, a first force sensor 3, and a second force sensor 4.

[0048] Fixture 1 is used to fix the test piece 2. For example, as shown... Figure 1 As shown, the test piece 2 can be a vehicle subframe, etc. In some other embodiments, the test piece 2 can also be a front frame, etc.

[0049] The fixed fixture 1 may include some brackets and other structures. When in use, the subframe can be directly fixed to the fixed fixture 1 by bolts, etc., thereby meeting the usage requirements for fixing the test piece 2.

[0050] The first force sensor 3 is used to measure the load on the test piece 2 in a first direction. For example... Figure 1 As shown, the first direction can be from right front to left rear. When the test piece 2 is impacted by the subsequent force application device 5, the first force sensor 3 can collect the load in the first direction (Y direction of the vehicle body).

[0051] The second force sensor 4 is connected to the force application device 5 and is used to measure the load on the test piece 2 in the second direction. For example, as Figure 1 As shown, the force application device 5 can be driven linearly, etc., and can be arranged to extend along a second direction, which is generally from left front to right rear. The second force sensor 4 can be installed on the force application device 5. When the test piece 2 is impacted by the force application device 5, the second force sensor 4 can collect the load in the second direction (X direction of the vehicle body).

[0052] The first direction and the second direction intersect, and the fixed fixture 1 is positioned within the angled area between the first direction and the second direction. For example, as... Figure 1 As shown, the first and second directions are not parallel. The area defined by the smaller angle formed by the two directions is the region within this area. The aforementioned fixing device can fix the position within this angled region. This arrangement facilitates the acquisition of loads in the first and second directions.

[0053] The strength testing device of this utility model embodiment can perform collision tests on the subframe and other test pieces 2, and can simultaneously acquire the loads in both the X and Y directions during the test, thereby providing effective data support for subsequent vehicle design verification.

[0054] In some embodiments, the force application device 5 includes a pressing head 51 and a driver 52. The pressing head 51 is used to apply a load to the test piece 2. The first force sensor 3 and the second force sensor 4 are used to measure the load value applied by the pressing head 51 to the test piece 2. The driver 52 is connected to the pressing head 51 and is used to drive the pressing head 51 to apply a load to the test piece 2.

[0055] For example, such as Figure 1 As shown, the extrusion head 51 can be a cylindrical structure, and the rear end of the extrusion head 51 can be cylindrical or spherical. The sliding direction of the extrusion head 51 is the second direction mentioned above. The driver 52 can be a linear drive such as a hydraulic cylinder, and the driver 52 can generally extend along the second direction mentioned above. The rear end of the driver 52 can be connected and fixed to the extrusion head 51.

[0056] In use, the subframe can first be installed on the aforementioned fixed fixture 1, and then the driver 52 can be activated. The extension of the driver 52 can drive the compression head 51 to slide backward, thereby achieving a collision with the subframe. During the above test, the first force sensor 3 and the second force sensor 4 can respectively collect the collision load in the first direction and the second direction, thereby achieving the test purpose of verifying the crush strength of the subframe itself by means of the acquired collision load.

[0057] In some embodiments, the strength testing apparatus includes a first measuring fixture 6 and a second measuring fixture 7, an extrusion head 51 is slidably assembled with the first measuring fixture 6 in a second direction, and a driver 52 is connected between the second measuring fixture 7 and the extrusion head 51.

[0058] For example, such as Figure 1 As shown, the first measuring fixture 6 can be arranged on the right side of the fixed fixture 1, and the second measuring fixture 7 can be arranged on the front side of the fixed device. The front end of the driver 52 of the force application device 5 can be connected to the second measuring fixture 7, and the extrusion head 51 of the force application device 5 can be located at the rear end of the force application device 5. The extrusion head 51 can be slidably assembled with the first measuring fixture 6 through a structure such as a slide rail. The second force sensor can be installed between the second measuring fixture 7 and the force application device 5.

[0059] In use, the first measuring fixture 6 and the second measuring fixture 7 can form a return frame, thereby meeting the loading requirements of the test piece 2 and ensuring the stability of the entire load loading.

[0060] In some embodiments, the strength testing apparatus includes a base 8, a fixing fixture 1 disposed on the base 8, a first measuring fixture 6 disposed on the base 8 or on the side of the base 8, and a second measuring fixture 7 disposed on the base 8.

[0061] For example, such as Figure 1As shown, the base 8 can be flat, horizontally arranged, and directly fixed to the floor using anchor bolts. Specifically, the base 8 can be rectangular, with its length generally in the front-to-back direction and its width generally in the left-to-right direction.

[0062] A fixing fixture 1 is mounted on the base 8 and used to install the subframe. A first measuring fixture 6 is mounted on the base 8 or on the side of the base 8, and a second measuring fixture 7 is mounted on the base 8. For example, such as... Figure 1 As shown, the fixed fixture 1 can be installed on the rear half of the base 8, the first measuring fixture 6 can be installed on the right side of the base 8 and fixed to the floor, and the second measuring fixture 7 can be installed on the front half of the base 8. The base 8 can achieve the integration and unification of the installation arrangement of the fixed fixture 1, the first measuring fixture 6, and the second measuring fixture 7.

[0063] In some embodiments, the position of at least one of the fixing fixture 1, the first measuring fixture 6, and the second measuring fixture 7 relative to the base 8 is adjustable. For example, as Figure 1 As shown, the base 8 can be provided with multiple installation points, and the fixing fixture 1, the first measuring fixture 6 and the second measuring fixture 7 can be detachably installed at the corresponding installation points.

[0064] In use, the fixed fixture 1, the first measuring fixture 6, and the second measuring fixture 7 can be assembled to different installation points, thereby allowing for adjustments to the relative positions of these fixtures to meet the loading requirements of different working conditions. Specifically, in use, the positions of the fixed fixture 1, the first measuring fixture 6, and the second measuring fixture 7 can be adjusted according to the collision requirements of the subframes of different vehicle models, thereby allowing for adjustments to the collision angle and orientation of the extrusion head 51 on the subframe, thus meeting the needs of collision tests for different vehicle models.

[0065] In some embodiments, the base 8 is provided with a plurality of mounting holes 81, and the fixing fixture 1 and the second measuring fixture 7 are detachably assembled into the mounting holes 81 of the base 8 by means of fasteners.

[0066] For example, such as Figure 1 As shown, the multiple mounting holes 81 can be divided into multiple rows and multiple columns. Each row includes multiple mounting holes 81 arranged at intervals along the front-back direction, and each column also includes multiple mounting holes 81 arranged at intervals along the left-right direction.

[0067] During assembly, both the fixed fixture 1 and the first measuring fixture 6 can be fixed to the corresponding positions on the base 8 using fasteners such as bolts. When it is necessary to adjust the collision angle of the extrusion head 51, the position of the fixed fixture 1 or the position of the first measuring fixture 6 and the second measuring fixture 7 can be adjusted. In other words, the fasteners can be installed into the corresponding mounting holes 81, which facilitates the adjustment of the positions of the fixed fixture 1, the first measuring fixture 6, and the second measuring fixture 7 and improves the convenience of operation.

[0068] In some embodiments, the fixture 1 includes a first plate 11 and a plurality of first brackets 12. The first plate 11 is detachably mounted on the base 8. The plurality of first brackets 12 are disposed on the first plate 11 and arranged at intervals along the circumference of the first plate 11. The first brackets 12 are used to fix the test piece 2.

[0069] For example, such as Figure 1 As shown, the first plate 11 can be generally rectangular. The first plate 11 can be fixed to the base 8 by bolts or the like. There can be five first supports 12, three of which can be arranged adjacent to the left side of the first plate 11 and spaced apart along the front-back direction, and the other two can be arranged adjacent to the right side of the first plate 11 and spaced apart along the front-back direction. Each first support 12 can be fixed to the first plate 11 by welding or the like.

[0070] In use, the subframe can be connected and fixed to each first bracket 12 by bolts, which facilitates the installation and layout of the subframe, improves the convenience of operation, and ensures the overall structural stability of the subframe after installation by multiple first brackets 12, thus meeting the needs of crash testing.

[0071] In some embodiments, the first measuring fixture 6 includes a second support 61, a fixed part 62 and a movable part 63. The second support 61 is disposed on the base 8 or installed on the ground, the fixed part 62 is disposed on the second support 61, the movable part 63 is slidably assembled to the fixed part 62, and the extrusion head 51 is connected to the movable part 63.

[0072] For example, such as Figure 1 As shown, the second bracket 61 can be located on the right side of the base 8 and can be directly fixed to the floor. Both the fixed part 62 and the movable part 63 can be a vertical plate 723 structure. The fixed part 62 can be fixed to the right side of the second bracket 61 by bolts, etc., while the movable part 63 can be slidably assembled on the left side of the fixed part 62, and the movable part 63 can slide back and forth in a second direction relative to the fixed part 62. The extrusion head 51 can be connected to the left side of the movable part 63 by bolts.

[0073] When the driver 52 drives the extrusion head 51 to slide, under the limiting action of the movable part 63 and the fixed part 62, the extrusion head 51 can slide only along the second direction, thereby ensuring the guiding nature of the extrusion head 51's sliding and thus ensuring the overall collision accuracy.

[0074] In some embodiments, one of the fixed part 62 and the movable part 63 is provided with a slide rail, and the other is provided with a slide groove, with the slide rail slidingly engaged within the slide groove. For example, the slide rail may be located on the left side of the fixed part 62 and may extend along a second direction, while the slide groove may be located on the right side of the movable part 63. The cross-sectional shape of the slide groove is adapted to the cross-sectional shape of the slide rail, allowing the slide rail to slidely engage within the slide groove, thereby fully ensuring the guiding nature of the sliding engagement between the movable part 63 and the fixed part 62.

[0075] In some embodiments, the second measuring fixture 7 includes a second plate 71 and a third bracket 72. The second plate 71 is detachably mounted on the base 8, and the third bracket 72 is disposed on the second plate 71. One end of the driver 52 is rotatably connected to the third bracket 72, and the other end of the driver 52 is connected to the second force sensor 4.

[0076] For example, such as Figure 1 As shown, the second plate 71 can be roughly rectangular and can be fixed to the top side of the base 8 with bolts. The third bracket 72 can be a corner plate structure and can be welded and fixed above the second plate 71. The front end of the aforementioned driver 52 can be connected and fixed to the third bracket 72, and the rear end of the driver 52 can be connected and fixed to the second force sensor 4, thereby facilitating the assembly and fixing of the end of the driver 52.

[0077] In some embodiments, the end of the extrusion head 51 is provided with a first ear plate 511, and the second force sensor 4 is rotatably assembled with the first ear plate 511. For example, as Figure 1 As shown, there may be two first ear plates 511, which can be arranged in parallel and spaced apart in the left and right directions. The rear end of the second force sensor 4 can be pivotally mounted between the two first ear plates 511.

[0078] In some embodiments, the third bracket 72 is provided with a second ear plate 721, and the driver 52 is rotatably assembled with the second ear plate 721. For example, as Figure 1 As shown, the rear side of the third bracket 72 may be provided with two second ear plates 721. The two second ear plates 721 may be arranged in parallel and spaced apart in the left and right directions. The front end of the driver 52 may be pivotally mounted between the two second ear plates 721, thereby facilitating the connection and assembly of the driver 52 and the third bracket 72.

[0079] In some embodiments, the third support 72 includes a base plate 722, an upright plate 723 and at least two inclined plates 724. The base plate 722 is connected to the second plate 71, the upright plate 723 is connected to the base plate 722, the driver 52 is connected to the upright plate 723, and the at least two inclined plates 724 are disposed in the angled area formed by the base plate 722 and the upright plate 723, and the at least two inclined plates 724 are located on the side of the upright plate 723 away from the driver 52.

[0080] For example, such as Figure 1 As shown, the base plate 722 can be flat and can be connected and fixed to the second plate 71 by welding or other means. A vertical plate 723 can be provided and can be fixed to the base plate 722 by casting, welding, or other means. The vertical plate 723 can be arranged vertically, and its bottom side can be connected to the rear edge of the base plate 722.

[0081] Two inclined plates 724 can be provided, each of which can be triangular in shape. Both inclined plates 724 can be welded and fixed within the angle formed by the base plate 722 and the upright plate 723, and the two inclined plates 724 can be arranged at intervals in the left and right directions. This ensures the overall structural strength of the third support 72 and fully meets the requirements for collision applications.

[0082] In some embodiments, the fixing fixture 1, the first measuring fixture 6, and the second measuring fixture 7 are disposed on the outer periphery of the integral formed by the driver 52 and the extrusion head 51 and are arranged at circumferential intervals along the integral.

[0083] For example, such as Figure 1 As shown, the fixed fixture 1, the first measuring fixture 6, and the second measuring fixture 7 can be arranged in a triangular pattern. The whole formed by the driver 52 and the extrusion head 51 can be arranged in the space area enclosed by the fixed fixture 1, the first measuring fixture 6, and the second measuring fixture 7, thereby enhancing the overall structural stability and fully meeting the needs of the collision test.

[0084] In some embodiments, the extending direction of the driver 52 is arranged at an angle to the relative direction of the fixing fixture 1 and the second measuring fixture 7. For example, as Figure 1 As shown, the extension direction of the driver 52 can be roughly from left front to right rear, and the relative direction of the fixed fixture 1 and the first measuring fixture 6 can be the front-back direction. That is, the driving direction of the driver 52 is not parallel to the front-back direction and has a certain angle, which can make the collision test conform to the actual working conditions and help to enhance the accuracy of the collision test results.

[0085] In some embodiments, the strength testing apparatus described above may specifically include the following steps during use:

[0086] 1. The direction of force on the subframe during a vehicle collision can be simulated first through a simulation system.

[0087] 2. Then, according to the test requirements, the strength test device should be set up first before the test. Then, the fixing fixture used to fix the subframe can be fixed in the base according to the coordinates. Then, the sample of the subframe can be assembled onto the fixing fixture to ensure that the posture of the sample of the subframe is consistent with that of the actual vehicle.

[0088] 3. Install the constraint fixtures (first measuring fixture and second measuring fixture) in place in all directions, and finally arrange the driver and adjust the attitude of the driver, and lock all devices.

[0089] 4. The subframe prototype can be loaded using a single-sided loading method. During loading, the driver can control the loading at a constant speed. When a significant decrease in the cylinder load is detected, indicating obvious fracture or damage to the subframe prototype, loading can be stopped immediately.

[0090] 5. Record the displacement and corresponding load values ​​during the test, and finally output the force-displacement curve.

[0091] The strength testing device of this utility model embodiment can realize simulated collision strength test verification of subframe strength. It can accurately obtain the structural path strength and weak points of the subframe before a full vehicle collision, thereby greatly improving the vehicle's collision pass rate after rectification and optimization. Simultaneously, it can calibrate simulation models, providing strong support for product development. This testing device can verify the subframe strength and collect the X and Y force components in a single test loading, thus achieving the test purpose of verifying its own crush strength.

[0092] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A strength testing device, characterized by, include: Fixtures are used to hold the test piece in place. A first force sensor is used to measure the load on the test piece in a first direction; The second force sensor, connected to the force application device, is used to measure the load on the test piece in the second direction; The first direction and the second direction intersect; The fixing fixture is located within the angle region between the first direction and the second direction.

2. The strength testing device of claim 1, wherein, The force-applying device includes: An extrusion head is used to apply a load to the test piece, and a first force sensor and a second force sensor are used to measure the load value applied by the extrusion head to the test piece. A driver, connected to the extrusion head and used to drive the extrusion head to apply a load to the test piece.

3. The strength testing apparatus of claim 2, wherein, include: A first measuring fixture, wherein the extrusion head is slidably assembled with the first measuring fixture in the second direction; A second measuring fixture, wherein the driver is connected between the second measuring fixture and the extrusion head.

4. The strength testing apparatus of claim 3, wherein Includes a base, the fixing fixture is disposed on the base, the first measuring fixture is disposed on the base or on the side of the base, and the second measuring fixture is disposed on the base.

5. The strength testing apparatus of claim 4, wherein, At least one of the fixed fixture, the first measuring fixture, and the second measuring fixture is adjustable relative to the base.

6. The strength testing apparatus of claim 5, wherein, The base is provided with multiple mounting holes, and the fixing fixture and the second measuring fixture are detachably assembled into the mounting holes of the base by fasteners.

7. The strength testing apparatus of claim 4, wherein The fixed fixture includes: The first plate is detachably mounted on the base; Multiple first supports are provided on the first plate and arranged at intervals along the circumference of the first plate. The first supports are used to fix the test piece.

8. The strength testing device of any one of claims 4-7, wherein, The first measuring fixture includes: The second support is disposed on the base or installed on the ground; The device includes a fixed part and a movable part. The fixed part is located on the second bracket, and the movable part is slidably assembled on the fixed part. The extrusion head is connected to the movable part.

9. The strength testing apparatus of claim 8, wherein, One of the fixed part and the movable part is provided with a slide rail, and the other part is provided with a slide groove, wherein the slide rail slides and engages within the slide groove.

10. The strength testing apparatus according to any one of claims 4-7, characterized in that, The second measuring fixture includes: The second plate is detachably mounted to the base; The third bracket is mounted on the second plate. One end of the driver is rotatably connected to the third bracket, and the other end of the driver is connected to the second force sensor.

11. The strength testing apparatus of claim 10, wherein, The end of the extrusion head is provided with a first ear plate, and the second force sensor is rotatably assembled with the first ear plate; And / or, the third bracket is provided with a second ear plate, and the driver is rotatably assembled with the second ear plate.

12. The strength testing apparatus of claim 10, wherein, The third support includes: A base plate, which is connected to the second plate; A vertical plate, which is connected to the base plate, and a driver connected to the vertical plate; At least two inclined plates are provided in the angled area formed by the base plate and the upright plate, and at least two of the inclined plates are located on the side of the upright plate away from the driver.

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