Front suspension system deformation measuring device

Abstract

The present application relates to a kind of front suspension system deformation measuring device. Front suspension system deformation measuring device includes test bench, first direction load applicator, brake load applicator, leaf spring deformation measuring mechanism and front axle deformation measuring mechanism, test bench is used to support and fix front suspension system with leaf spring and front axle, the output of first direction load applicator is connected with front axle, and is used to apply first direction load to front axle, the output of brake load applicator is connected with front axle, and is used to apply brake load to front axle, the measuring end of leaf spring deformation measuring mechanism is in abutment with leaf spring, for measuring the deformation of leaf spring, the measuring end of front axle deformation measuring mechanism is in abutment with front axle, for measuring the deformation of front axle. It can be measured on test bench by leaf spring deformation measuring mechanism and front axle deformation measuring mechanism to measure the complex deformation state of important components such as large deformation nonlinear leaf spring and the deformation of front axle is very small.

Description

Technical Field

[0001] This invention relates to the field of deformation measurement technology, and in particular to a deformation measurement device for a front suspension system. Background Technology

[0002] In the front suspension system of commercial vehicles, leaf springs and the front axle are crucial components, and their deformation significantly impacts system performance. When the vehicle is subjected to vertical loads and braking (acceleration) loads, the leaf springs undergo a complex deformation state resulting from the superposition of vertical and "S"-shaped deformations, while the front axle also experiences complex and difficult-to-calculate deformations. For complex components like leaf springs with nonlinear and large deformations, current methods allow for theoretical research using simplified models and mathematical calculations, or simulation analysis using finite element method (FEM). However, for highly irregular and complex components like the front axle with minute deformations, although the deformation is small, its impact on the motion interference of the suspension and steering system is substantial. Currently, the front axle can only be simulated and calculated using FEM.

[0003] Traditional technologies for leaf springs and front axles cannot measure the actual deformation at key measuring points through bench tests, making it impossible to evaluate the accuracy of theoretical calculations and simulation analyses, or assess the degree of difference between these results and actual test measurements. Inaccurate deformation analysis significantly hinders the optimization of component design and affects the rationality of the overall vehicle layout.

[0004] Therefore, there is an urgent need to design a measuring device that can be used in bench tests and can measure the deformation of important components such as leaf springs and front axles in the front suspension system to solve the above problems. Summary of the Invention

[0005] Based on this, a front suspension system deformation measurement device is provided, which can be used in bench tests to measure the deformation of important components such as leaf springs and front axles in the front suspension system.

[0006] A front suspension system deformation measuring device, comprising:

[0007] A test bench is used to support and secure a front suspension system with leaf springs and a front axle.

[0008] A first directional load applicator, the output of which is connected to the front axle and used to apply a first directional load to the front axle;

[0009] A brake load applicator, the output of which is connected to the front axle and used to apply a brake load to the front axle;

[0010] A leaf spring deformation measuring mechanism, wherein the measuring end of the leaf spring abuts against the leaf spring and is used to measure the deformation of the leaf spring;

[0011] A front axle deformation measuring mechanism, wherein the measuring end of the front axle abuts against the front axle and is used to measure the deformation of the front axle.

[0012] In one embodiment, the test bench includes a leaf spring measuring plate, and the leaf spring deformation measuring mechanism includes a plurality of leaf spring displacement sensors disposed on the leaf spring measuring plate, wherein the measuring end of the leaf spring displacement sensor abuts against the leaf spring.

[0013] In one embodiment, the measuring end of the leaf spring displacement sensor abuts against the leaf spring along the first direction to measure the deformation of the leaf spring along the first direction, which is parallel to the thickness direction of the leaf spring.

[0014] In one embodiment, a first adjustment mechanism is provided between the leaf spring measuring plate and the leaf spring displacement sensor to adjust the distance between the measuring end of the leaf spring displacement sensor and the leaf spring.

[0015] In one embodiment, the first adjusting mechanism includes a first sleeve, which is fixedly connected to the leaf spring measuring plate. The first sleeve is sleeved on the outside of the leaf spring displacement sensor, and the first sleeve is provided with a first clamping screw to fix the leaf spring displacement sensor inside the first sleeve.

[0016] In one embodiment, the test bench includes a front axle measuring plate, and the front axle deformation measuring mechanism includes a plurality of front axle displacement sensors disposed on the front axle measuring plate, wherein the measuring end of the front axle displacement sensor abuts against the front axle.

[0017] In one embodiment, the front axle deformation measuring mechanism includes:

[0018] A first direction measurement sensor group, comprising a plurality of first front axle displacement sensors, wherein the measuring end of the first front axle displacement sensor abuts against the front axle along the first direction, for measuring the deformation of the front axle along the first direction;

[0019] The second direction measurement sensor group includes several second front axle displacement sensors. The measuring end of the second front axle displacement sensor abuts against the front axle along a second direction and is used to measure the deformation of the front axle along the second direction, which is parallel to the length direction of the leaf spring.

[0020] In one embodiment, the second direction measurement sensor group includes:

[0021] The upper edge sensor group includes a plurality of second front axle displacement sensors that abut against the upper edge of the front axle;

[0022] The lower edge sensor group includes a plurality of second front axle displacement sensors that abut against the lower edge of the front axle.

[0023] In one embodiment, a second adjustment mechanism is provided between the first front axle displacement sensor and the front axle measuring plate to adjust the distance between the measuring end of the first front axle displacement sensor and the front axle;

[0024] A third adjustment mechanism is provided between the second front axle displacement sensor and the front axle measuring plate to adjust the distance between the measuring end of the second front axle displacement sensor and the front axle.

[0025] In one embodiment, the test bench is provided with a fixing hole, and the front suspension system is provided with a U-bolt. After the U-bolt fixes the leaf spring and the front axle, it passes through the fixing hole and is connected with a nut.

[0026] The aforementioned front suspension system deformation measurement device can measure the complex deformation states of important components such as leaf springs with large nonlinear deformation and front axles with extremely small deformation when the front suspension system is subjected to loads along the first direction from the first load applicator and the braking load applicator, as well as the combined braking load, on the test bench through the leaf spring deformation measurement mechanism and the front axle deformation measurement mechanism. It can provide bench test verification for theoretical calculations and simulation analysis, and provide a basis for the optimization of component design and the rationality of the overall vehicle layout. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the front suspension system deformation measuring device of some embodiments of this application, with the first direction load applicator and the braking load applicator omitted.

[0028] Figure 2 This is a schematic diagram of the structure of the first direction load applicator and the braking load applicator in the front suspension system deformation measuring device of some embodiments of this application;

[0029] Figure 3 This is a front view of a front suspension system deformation measuring device according to some embodiments of this application;

[0030] Figure 4 This is a schematic diagram of the structure of the first adjustment mechanism in the front suspension system deformation measuring device of some embodiments of this application;

[0031] Figure 5 This is a schematic diagram of the structure of the first direction measuring sensor group in the front suspension system deformation measuring device of some embodiments of this application;

[0032] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0033] Figure 7 This is a schematic diagram of the front axle deformation measuring mechanism in the front suspension system deformation measuring device of some embodiments of this application;

[0034] Figure 8 for Figure 7 A magnified view of a portion of point B in the middle;

[0035] Figure 9 This is a structural schematic diagram of the front suspension system deformation measuring device of some embodiments of this application, with the first direction load applicator and the braking load applicator hidden.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Front suspension system; 11. Leaf springs; 12. Front axle; 13. U-bolts;

[0038] 2. Test bench; 21. Leaf spring measuring plate; 211. First leaf spring measuring plate; 212. Second leaf spring measuring plate; 22. Front axle measuring plate; 221. First extension plate; 222. Second extension plate;

[0039] 3. First direction load applicator;

[0040] 4. Braking load applicator;

[0041] 5. Leaf spring deformation measuring mechanism; 51. Leaf spring displacement sensor;

[0042] 6. First adjusting mechanism; 61. First sleeve; 62. First clamping screw;

[0043] 7. Front axle deformation measuring mechanism; 71. First direction measuring sensor group; 711. First front axle displacement sensor; 72. Second direction measuring sensor group; 721. Second front axle upper edge displacement sensor; 722. Second front axle lower edge displacement sensor;

[0044] 8. Second adjusting mechanism; 81. Second sleeve; 82. Second clamping screw;

[0045] 9. Third adjustment mechanism {upper and lower edges}; 91. Third sleeve; 92. Third clamping screw. Detailed Implementation

[0046] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0047] In the description of this invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above" or "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below" or "below" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0052] Currently, with the increasing popularity of automobiles, they have become people's primary means of transportation. The development of commercial vehicle technology is also accelerating. Commercial vehicles refer to automobiles used for transporting people and goods, typically including buses and trucks.

[0053] The inventors have noted that leaf springs and the front axle are crucial components in the front suspension system of commercial vehicles, and their deformation significantly impacts system performance. When a vehicle is subjected to vertical loads and braking (acceleration) loads, the leaf springs undergo a complex deformation state resulting from the superposition of vertical and "S"-shaped deformations, while the front axle also experiences complex and difficult-to-calculate deformations. For complex components like leaf springs, which exhibit nonlinearity and large deformation, theoretical research can currently be conducted using simplified models and mathematical calculations, or simulation analysis can be performed using finite element analysis. However, for highly irregular and complex components like the front axle, which exhibit minute deformations, although the deformation is small, its impact on the motion interference of the suspension and steering system is substantial. Currently, the front axle can only be simulated and calculated using finite element analysis.

[0054] Traditional technologies for leaf springs and front axles cannot measure the actual deformation at key measuring points through bench tests, making it impossible to evaluate the accuracy of theoretical calculations and simulation analyses, or assess the degree of difference between these results and actual test measurements. Inaccurate deformation analysis significantly hinders the optimization of component design and affects the rationality of the overall vehicle layout.

[0055] Based on the above considerations, and to solve the aforementioned problems, the inventors, through in-depth research, designed a front suspension system deformation measurement device. This device is applicable in bench tests and can measure the deformation of important components in the front suspension system, such as leaf springs and the front axle. It includes a test bench, a first-direction load applicator, and a braking load applicator. The first-direction load applicator applies a first-direction load to the front axle, and the braking load applicator applies a braking load to the front axle. The front suspension system deformation measurement device also includes a leaf spring deformation measurement mechanism and a front axle deformation measurement mechanism mounted on the test bench. The leaf spring deformation measurement mechanism measures the deformation of the leaf spring, and the front axle deformation measurement mechanism measures the deformation of the front axle. This front suspension system deformation measurement device can be applied in bench tests to measure the deformation of important components in the front suspension system, such as leaf springs and the front axle.

[0056] See Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the front suspension system deformation measuring device of some embodiments of this application, with the first direction load applicator 3 and the brake load applicator 4 omitted. Figure 2 This is a schematic diagram of the structure of the first directional load applicator 3 and the brake load applicator 4 in the front suspension system deformation measuring device of some embodiments of this application. A front suspension system deformation measuring device includes a test bench 2, a first directional load applicator 3, a brake load applicator 4, a leaf spring deformation measuring mechanism 5, and a front axle deformation measuring mechanism 7. The test bench 2 is used to support and fix the front suspension system 1 with a leaf spring 11 and a front axle 12. The output end of the first directional load applicator 3 is connected to the front axle 12 and is used to apply a first directional load to the front axle 12. The output end of the brake load applicator 4 is connected to the front axle 12 and is used to apply a brake load to the front axle 12. The measuring end of the leaf spring deformation measuring mechanism 5 abuts against the leaf spring 11 and is used to measure the deformation of the leaf spring 11. The measuring end of the front axle deformation measuring mechanism 7 abuts against the front axle 12 and is used to measure the deformation of the front axle 12.

[0057] like Figure 1 As shown in the figure, the Z direction is the first direction, which is parallel to the thickness direction of the leaf spring 11; the X direction is the second direction, which is parallel to the width direction of the leaf spring 11; and the Y direction is the third direction, which is parallel to the length direction of the leaf spring 11. The first direction, the second direction, and the third direction are all perpendicular to each other.

[0058] The aforementioned front suspension system deformation measurement device, when the front suspension system 1 is subjected to a load along the first direction from the first direction load applicator 3 and the braking load applicator 4, as well as a combined braking load, can measure the complex deformation states of important components such as the large deformation nonlinear steel leaf spring 11 and the front axle 12 with extremely small deformation on the test bench 2 through the leaf spring deformation measurement mechanism 5 and the front axle deformation measurement mechanism 7. It can provide bench test verification for theoretical calculation and simulation analysis, and provide a basis for the optimization of component design and the rationality of the overall vehicle layout.

[0059] See Figure 1Specifically, the test bench 2 is used to support and fix the front suspension system 1, which includes a leaf spring 11 and a front axle 12. In some embodiments, the test bench 2 is provided with fixing holes, and the front suspension system 1 is provided with U-bolts 13. After fixing the leaf spring 11 and the front axle 12, the U-bolts 13 pass through the fixing holes and are connected with nuts. In some embodiments, two U-bolts 13 are provided, and the two U-bolts 13 are fixed at the middle position of the leaf spring 11 at intervals. The U-bolts 13 are the parts used to fix the leaf spring 11 and the front axle 12 in the conventional technology. In this application, when fixing the front suspension system 1, fixing holes are directly opened at the corresponding positions on the test bench 2, and the existing U-bolts 13 are used to fix the front suspension system 1 to the test bench 2. The front suspension system 1 can be fixedly connected without modifying the front suspension system 1, which well ensures the inherent structural characteristics of the front suspension system 1, solves the modification problem of the front suspension system 1, and improves the test accuracy.

[0060] See Figure 2 In some embodiments, the first directional load applicator 3 includes a vertical actuator disposed along a first direction, the output of which applies a load along the first direction, i.e., a vertical load, to the steering knuckle of the front axle 12. The brake load applicator 4 includes a horizontal actuator disposed along a third direction, the output of which applies a load along the third direction, i.e., a brake load, to the front axle 12.

[0061] The measuring end of the leaf spring deformation measuring mechanism 5 abuts against the leaf spring 11 and is used to measure the deformation of the leaf spring 11.

[0062] See Figure 1 and Figure 3 , Figure 3 This is a front view of a front suspension system deformation measuring device according to some embodiments of this application. Specifically, in some embodiments, the test bench 2 includes a leaf spring measuring plate 21, and the leaf spring deformation measuring mechanism 5 includes a plurality of leaf spring displacement sensors 51 disposed on the leaf spring measuring plate 21. The measuring end of the leaf spring displacement sensor 51 abuts against the leaf spring 11. The leaf spring measuring plate 21 includes a first leaf spring measuring plate 211 and a second leaf spring measuring plate 212, which are respectively disposed on both sides of the front axle 12. The first leaf spring measuring plate 211 is fixed to the front axle 12 by a U-bolt 13, and the second leaf spring measuring plate 212 is fixed to the front axle 12 by another U-bolt 13.

[0063] In some embodiments, the measuring end of the leaf spring displacement sensor 51 abuts against the leaf spring 11 along a first direction to measure the deformation of the leaf spring 11 along the first direction, which is parallel to the thickness direction of the leaf spring 11. Specifically, the contact points between the measuring end of the leaf spring displacement sensor 51 and the leaf spring 11 are all arranged on the center surface of the leaf spring 11, enabling more accurate measurement of the deformation of the leaf spring 11.

[0064] See Figure 3 Specifically, a plurality of leaf spring displacement sensors 51 are provided on the first measuring plate 211 of the leaf spring. In some embodiments, seven leaf spring displacement sensors 51 are provided on the first measuring plate 211 of the leaf spring, and the seven leaf spring displacement sensors 51 are equally spaced on the first measuring plate 211 of the leaf spring. Optionally, the spacing between adjacent leaf spring displacement sensors 51 on the first measuring plate 211 of the leaf spring can be set according to the length of the leaf spring 11, and a spacing of 50mm-100mm is more suitable. When the spacing is less than 50mm, with the length of the leaf spring 11 fixed, a correspondingly larger number of leaf spring displacement sensors 51 needs to be set, which increases the cost; when the spacing is greater than 100mm, the number of measuring points decreases, and it is not possible to obtain as much deformation data of the leaf spring 11 as possible. In some embodiments, the spacing between adjacent leaf spring displacement sensors 51 on the first measuring plate 211 of the leaf spring is set to 60mm.

[0065] Specifically, a plurality of leaf spring displacement sensors 51 are provided on the second measuring plate 212 of the leaf spring. In some embodiments, six leaf spring displacement sensors 51 are provided on the second measuring plate 212 of the leaf spring, and the six leaf spring displacement sensors 51 are equally spaced on the second measuring plate 212 of the leaf spring. Optionally, the spacing between adjacent leaf spring displacement sensors 51 on the second measuring plate 212 of the leaf spring can be set according to the length of the leaf spring 11, and a spacing of 50mm-100mm is more suitable.

[0066] See Figure 4 , Figure 4 This is a schematic diagram of the structure of the first adjustment mechanism 6 in the front suspension system deformation measuring device according to some embodiments of this application. In some embodiments, a first adjustment mechanism 6 is provided between the leaf spring measuring plate 21 and the leaf spring displacement sensor 51. The first adjustment mechanism 6 is used to adjust the distance between the measuring end of the leaf spring displacement sensor 51 and the leaf spring 11.

[0067] Specifically, the first adjustment mechanism 6 includes a first sleeve 61, which is fixedly connected to the leaf spring measuring plate 21. The first sleeve 61 is sleeved on the outside of the leaf spring displacement sensor 51, and the first sleeve 61 is provided with a first clamping screw 62 to fix the leaf spring displacement sensor 51 inside the first sleeve 61. Taking the first adjustment mechanism 6 on the leaf spring first measuring plate 211 as an example, the leaf spring displacement sensor 51 is inserted into the first sleeve 61 and fixed by the first clamping screw 62. The position of the leaf spring displacement sensor 51 in the first direction can be adjusted to change the position of the output pin of the leaf spring displacement sensor 51, so that the pin of the leaf spring displacement sensor 51 can better abut against the leaf spring 11. By setting the first adjustment mechanism 6, the front suspension system deformation measuring device is also more flexible in measuring the deformation of the leaf spring 11, and can measure front suspension systems 1 of various models and sizes, thus improving the applicability of the front suspension system deformation measuring device. In some embodiments, the first sleeve 61 is fixedly connected to the first measuring plate 211 of the leaf spring by bolts. Multiple connecting holes can be provided on the first measuring plate 211 of the leaf spring, allowing the first sleeve 61 to be installed at different positions on the first measuring plate 211 of the leaf spring. The first adjusting mechanism 6 on the second measuring plate 212 of the leaf spring has the same structure and will not be described again here.

[0068] See Figures 5 to 7 , Figure 5 This is a schematic diagram of the structure of the first direction measuring sensor group 71 in the front suspension system deformation measuring device of some embodiments of this application. Figure 6 for Figure 5 A magnified view of a portion of point A in the diagram. Figure 7 This is a schematic diagram of the front axle deformation measuring mechanism 7 in a front suspension system deformation measuring device according to some embodiments of this application. The measuring end of the front axle deformation measuring mechanism 7 abuts against the front axle 12 and is used to measure the deformation of the front axle 12. In some embodiments, the test bench 2 includes a front axle measuring plate 22, and the front axle deformation measuring mechanism 7 includes a plurality of front axle 12 displacement sensors disposed on the front axle measuring plate 22, the measuring ends of the front axle 12 displacement sensors abutting against the front axle 12.

[0069] See Figure 7 Specifically, in some embodiments, the front axle deformation measuring mechanism 7 includes a first direction measuring sensor group 71 and a second direction measuring sensor group 72.

[0070] See Figure 5 and Figure 6The first direction measurement sensor group 71 includes a plurality of first front axle displacement sensors 711. The measuring ends of the first front axle displacement sensors 711 abut against the front axle 12 along the first direction and are used to measure the deformation of the front axle 12 along the first direction. A first extension plate 221 is fixedly disposed on the front axle measuring plate 22, which is located below the front axle 12. The first direction measurement sensor group 71 is disposed on the first extension plate 221. In some embodiments, six first front axle displacement sensors 711 are disposed on the first direction measurement sensor group 71, and the six first front axle displacement sensors 711 are equally spaced on the first extension plate 221. Optionally, the spacing between adjacent first front axle displacement sensors 711 on the first extension plate 221 can be set according to the shape and size of the front axle 12, and a spacing of 20mm-30mm is more suitable. When the spacing is less than 20mm, with the front axle 12 dimensions fixed, a greater number of first front axle displacement sensors 711 are required, increasing costs. When the spacing is greater than 30mm, the number of measurement points decreases, making it impossible to obtain as much deformation data as possible from the front axle 12. In some embodiments, the spacing between adjacent first front axle displacement sensors 711 on the first extension plate 221 is set to 25mm.

[0071] Specifically, the measuring end of the first front axle displacement sensor 711 and the contact point with the front axle 12 are both arranged on the center surface of the bottom of the front axle 12, which enables more accurate measurement of the deformation of the front axle 12.

[0072] See Figure 6 In some embodiments, a second adjusting mechanism 8 is provided between the first front axle displacement sensor 711 and the front axle measuring plate 22 to adjust the distance between the measuring end of the first front axle displacement sensor 711 and the front axle 12. A third adjusting mechanism is provided between the second front axle displacement sensor and the front axle measuring plate 22 to adjust the distance between the measuring end of the second front axle displacement sensor and the front axle 12.

[0073] Specifically, in some embodiments, a second adjusting mechanism 8 is provided between the first extension plate 221 and the first front axle displacement sensor 711. The second adjusting mechanism 8 is used to adjust the distance between the measuring end of the first front axle displacement sensor 711 and the front axle 12.

[0074] Specifically, the second adjustment mechanism 8 includes a second sleeve 81, which is fixedly connected to the first extension plate 221. The second sleeve 81 is sleeved on the outside of the first front axle displacement sensor 711, and the second sleeve 81 is provided with a second clamping screw 82 to fix the first front axle displacement sensor 711 inside the second sleeve 81. The first front axle displacement sensor 711 is inserted into the second sleeve 81 and fixed by the second clamping screw 82. The position of the first front axle displacement sensor 711 in the first direction can be adjusted to change the position of the output pin of the first front axle displacement sensor 711, so that the pin of the first front axle displacement sensor 711 better abuts against the front axle 12. In some embodiments, the second sleeve 81 is fixedly connected to the first extension plate 221 by bolt connection. Multiple connection holes can be provided on the first extension plate 221 so that the second sleeve 81 can be installed at different positions on the first extension plate 221. The second adjustment mechanism 8 makes the front suspension system deformation measuring device more flexible in measuring the deformation of the front axle 12, enabling it to measure front suspension systems 1 of various sizes and models, thus improving the applicability of the front suspension system deformation measuring device.

[0075] See Figure 7 and Figure 8 , Figure 8 for Figure 7 A partially enlarged schematic diagram at point B. In some embodiments, the second direction measuring sensor group 72 includes several second front axle displacement sensors. The measuring ends of the second front axle displacement sensors abut against the front axle 12 along the second direction, and are used to measure the deformation of the front axle 12 along the second direction, which is parallel to the length direction of the leaf spring 11.

[0076] Specifically, in some embodiments, the second direction measurement sensor group 72 includes an upper edge sensor group and a lower edge sensor group. The front axle measuring plate 22 includes a second extension plate 222, which is located on the side of the front axle 12. The upper edge sensor group includes a plurality of second front axle displacement sensors that abut against the upper edge of the front axle 12. The second front axle displacement sensors in the upper edge sensor group are labeled as second front axle upper edge displacement sensors 721. The second front axle upper edge displacement sensors 721 are mounted on the second extension plate 222. Optionally, six second front axle upper edge displacement sensors 721 are provided. The six second front axle upper edge displacement sensors 721 are equally spaced on the second extension plate 222. Optionally, the spacing between adjacent second front axle upper edge displacement sensors 721 on the second extension plate 222 can be set according to the shape and size of the front axle 12. The spacing between adjacent second front axle upper edge displacement sensors 721 can be equal to the spacing between adjacent first front axle displacement sensors 711, or it can be flexibly set according to specific circumstances, which will not be elaborated here.

[0077] Specifically, in some embodiments, the lower edge sensor group includes a plurality of second front axle displacement sensors that abut against the lower edge of the front axle 12. The second front axle displacement sensors within the upper edge sensor group are designated as second front axle lower edge displacement sensors 722. The second front axle lower edge displacement sensors 722 are mounted on the second extension plate 222. Optionally, six second front axle lower edge displacement sensors 722 are provided. The six second front axle lower edge displacement sensors 722 are equally spaced on the second extension plate 222. Optionally, the spacing between adjacent second front axle lower edge displacement sensors 722 on the second extension plate 222 can be set according to the shape and size of the front axle 12. The spacing between adjacent second front axle lower edge displacement sensors 722 can be equal to the spacing between the second front axle upper edge displacement sensors 721, or can be flexibly set according to specific circumstances, which will not be elaborated here.

[0078] See Figure 8 A third adjusting mechanism is provided between the second front axle displacement sensor and the front axle measuring plate 22 to adjust the distance between the measuring end of the second front axle displacement sensor and the front axle 12. The third adjusting mechanism includes a third sleeve 91 and a third clamping screw 92. It can be understood that the structure of the third adjusting mechanism is similar to that of the first adjusting mechanism 6, or it may be different, as long as it has the function of adjusting the distance and clamping the corresponding second front axle displacement sensor.

[0079] See Figure 9 The front suspension system deformation measurement device in this application can measure the complex deformation state of important components such as the large deformation nonlinear steel leaf spring 11 and the front axle 12 with extremely small deformation when the front suspension system 1 is subjected to the vertical load of the first direction load applicator 3 and the braking load applicator 4, as well as the braking combined load, on the test bench 2 through the leaf spring deformation measurement mechanism 5 and the front axle deformation measurement mechanism 7. It can provide bench test verification for theoretical calculation and simulation analysis, and provide a basis for the optimization of component design and the rationality of the overall vehicle layout.

[0080] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0081] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A device for measuring the deformation of a front suspension system, characterized in that, include: A test bench is used to support and secure a front suspension system with leaf springs and a front axle. A first directional load applicator, the output of which is connected to the front axle and used to apply a first directional load to the front axle; A brake load applicator, the output of which is connected to the front axle and used to apply a brake load to the front axle; A leaf spring deformation measuring mechanism, wherein the measuring end of the leaf spring abuts against the leaf spring and is used to measure the deformation of the leaf spring; A front axle deformation measuring mechanism, wherein the measuring end of the front axle deformation measuring mechanism abuts against the front axle and is used to measure the deformation of the front axle; The front axle deformation measuring mechanism includes: A first direction measurement sensor group includes a plurality of first front axle displacement sensors. The measuring end of each first front axle displacement sensor abuts against the front axle along the first direction and is used to measure the deformation of the front axle along the first direction. The abutments of the measuring ends of the first front axle displacement sensors against the front axle are all arranged on the center surface of the bottom of the front axle. The second direction measurement sensor group includes several second front axle displacement sensors. The measuring end of the second front axle displacement sensor abuts against the front axle along the second direction and is used to measure the deformation of the front axle along the second direction, which is parallel to the length direction of the leaf spring. The test bench includes a front axle measuring plate, and the front axle deformation measuring mechanism includes a plurality of front axle displacement sensors disposed on the front axle measuring plate, wherein the measuring end of the front axle displacement sensor abuts against the front axle.

2. The front suspension system deformation measuring device according to claim 1, characterized in that, The test bench includes a leaf spring measuring plate, and the leaf spring deformation measuring mechanism includes a plurality of leaf spring displacement sensors disposed on the leaf spring measuring plate, wherein the measuring end of the leaf spring displacement sensor abuts against the leaf spring.

3. The front suspension system deformation measuring device according to claim 2, characterized in that, The measuring end of the leaf spring displacement sensor abuts against the leaf spring along the first direction to measure the deformation of the leaf spring along the first direction, which is parallel to the thickness direction of the leaf spring.

4. The front suspension system deformation measuring device according to claim 2, characterized in that, A first adjustment mechanism is provided between the leaf spring measuring plate and the leaf spring displacement sensor to adjust the distance between the measuring end of the leaf spring displacement sensor and the leaf spring.

5. The front suspension system deformation measuring device according to claim 4, characterized in that, The first adjustment mechanism includes a first sleeve, which is fixedly connected to the leaf spring measuring plate. The first sleeve is sleeved on the outside of the leaf spring displacement sensor, and the first sleeve is provided with a first clamping screw to fix the leaf spring displacement sensor inside the first sleeve.

6. The front suspension system deformation measuring device according to claim 1, characterized in that, The second direction measurement sensor group includes: The upper edge sensor group includes a plurality of second front axle displacement sensors that abut against the upper edge of the front axle.

7. The front suspension system deformation measuring device according to claim 6, characterized in that, The second direction measurement sensor group includes: The lower edge sensor group includes a plurality of second front axle displacement sensors that abut against the lower edge of the front axle.

8. The front suspension system deformation measuring device according to claim 1, characterized in that, A second distance adjustment mechanism is provided between the first front axle displacement sensor and the front axle measuring plate to adjust the distance between the measuring end of the first front axle displacement sensor and the front axle.

9. The front suspension system deformation measuring device according to claim 8, characterized in that, A third adjustment mechanism is provided between the second front axle displacement sensor and the front axle measuring plate to adjust the distance between the measuring end of the second front axle displacement sensor and the front axle.

10. The front suspension system deformation measuring device according to claim 1, characterized in that, The test bench is provided with fixing holes, and the front suspension system is provided with U-bolts. After the U-bolts fix the leaf spring and the front axle, they pass through the fixing holes and are connected with nuts.

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