Test tool and test equipment with same

Abstract

The utility model discloses a test tool and a test device having the same, the test tool comprises a first fixing member, the first fixing member is provided with a loading area and a plurality of first installation parts, the plurality of first installation parts are arranged in a rotational symmetry manner about the loading area, and the loading area is provided with a plurality of second installation parts; the plurality of first mounting parts are in one-to-one correspondence with the plurality of suspensions and are used for being connected with engine connecting parts of the corresponding suspensions; and the second fixing piece is arranged on the lower side of the first fixing piece, the second fixing piece is provided with a plurality of second mounting parts, and the multiple second mounting parts correspond to the multiple suspensions one to one and are used for being connected with the vehicle body connecting parts of the corresponding suspensions. According to the test tool provided by the utility model, the inherent frequency of the whole structure can be well improved after the suspension is clamped and fixed by the test tool, the high-frequency resonance phenomenon in the test process is well improved, more accurate data can be obtained in a higher frequency range in the suspension rigidity performance test, and the test efficiency is improved. Therefore, the development and NVH adjustment of a suspended product can be smoothly carried out.

Description

Technical Field

[0001] The utility model relates to the technical field of test equipment, in particular to a test tool and a test equipment having the same. Background Art

[0002] In a vehicle, the engine and the vehicle body are usually connected and fixed by a suspension. The suspension can provide support, limit and vibration isolation for the installation, fixation and operation of the engine. The stiffness of the suspension has a direct impact on the NVH (noise vibration harshness) performance of the vehicle. From the perspective of support and limit, considering the compactness and limited space, it is necessary to limit the movement of the engine, requiring the suspension system to have a high static stiffness; from the perspective of vibration isolation, it is necessary to transmit the vibration of the engine and the road to the vehicle body as little as possible, requiring the suspension system to have low stiffness at high frequencies. The dynamic and static stiffness parameters of the suspension system must take these two aspects into account. Therefore, during the design and manufacturing process of the suspension, the suspension needs to be tested to obtain accurate performance parameters, which is convenient for determining the adjustment direction of the suspension and can greatly shorten the development cycle of the suspension product.

[0003] When testing the suspension, it is necessary to examine the stiffness performance of the suspension at different frequencies. The frequency range that needs to be examined for the suspension is relatively large. In related technologies, the natural frequency of the test device is relatively low, which causes high-frequency resonance in the test device within the frequency range of the suspension test. This greatly reduces the accuracy of the dynamic stiffness data obtained from the suspension test within a higher frequency range, thereby affecting the development of suspension products and NVH tuning. 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 test fixture, which can well improve the natural frequency, greatly reduce the probability of high-frequency resonance during the suspension test, meet the needs of the suspension test, and enable the suspension to obtain more accurate dynamic stiffness data within a higher frequency range, so that the development of the suspension product and NVH adjustment can be carried out more smoothly and efficiently.

[0005] The utility model also provides a testing device having the above-mentioned testing tool.

[0006] According to the test jig of the first aspect of the utility model, the test jig is used to perform stiffness tests on multiple suspensions, the suspensions have a body connection part and an engine connection part, and the test jig includes: a first fixing member, the first fixing member is provided with a loading area and a plurality of first mounting parts, the plurality of first mounting parts are arranged rotationally symmetrically with respect to the loading area, the plurality of first mounting parts correspond one-to-one with the plurality of suspensions and are used to be connected to the engine connection parts of the corresponding suspensions; a second fixing member, the second fixing member is arranged on the lower side of the first fixing member, the second fixing member is provided with a plurality of second mounting parts, the plurality of second mounting parts correspond one-to-one with the plurality of suspensions and are used to be connected to the body connection parts of the corresponding suspensions.

[0007] According to the test fixture of the utility model, by providing a loading area and a plurality of first mounting parts rotationally symmetrically arranged about the loading area in a first fixing member, the plurality of first mounting parts are connected to a plurality of suspended engine connecting parts, and the plurality of second mounting parts of the second fixing member are connected to a plurality of suspended vehicle body connecting parts, the overall structure is made more stable after the test fixture is clamped and fixed to the suspension, the influence of the deflection torque of the first fixing member during the test is eliminated, the natural frequency of the overall structure is greatly improved after the test fixture is clamped and fixed to the suspension, the high-frequency resonance phenomenon during the test is greatly improved, and the suspension stiffness performance test can obtain more accurate data within a higher frequency range, so that the product development and NVH adjustment of the suspension can proceed smoothly.

[0008] In addition, the test tool according to the utility model may also have the following additional technical features:

[0009] In some embodiments of the present invention, the loading area is formed with a loading connection hole for connecting a loading device, the loading connection hole extends vertically, and the plurality of first mounting portions are rotationally symmetrical about a central axis of the loading connection hole.

[0010] In some embodiments of the present invention, the first fixing member is rotationally symmetric with respect to the loading area.

[0011] In some embodiments of the present invention, the first fixing member includes a horizontally arranged fixing plate portion, the first mounting portion is columnar and is connected to the lower surface of the fixing plate portion and extends downward, a plurality of first mounting holes are formed on the first mounting portion, the first mounting holes extend vertically and pass through the lower end surface of the first mounting portion, and the plurality of first mounting holes are arranged at intervals in a horizontal plane.

[0012] In one embodiment of the present invention, a avoidance groove is formed on a side surface of the first mounting portion facing the suspension, the avoidance groove extends vertically and passes through the lower end edge of the first mounting portion, and the avoidance groove is one or a plurality of avoidance grooves arranged at intervals.

[0013] In some embodiments of the present invention, the second fixing member is symmetrically arranged with respect to the loading area.

[0014] In some embodiments of the present invention, the second fixing member includes a support plate and a plurality of support columns, the support plate is horizontally arranged, the plurality of support columns are connected to the support plate and extend vertically upward, and the second mounting portion includes: a second mounting hole and a third mounting hole, the second mounting hole is formed at the upper end of the support column, and the third mounting hole is formed on the support plate.

[0015] In one embodiment of the present invention, a raised supporting boss is formed on the upper surface of the supporting plate, the supporting boss corresponds to the third mounting hole one by one, and the third mounting hole passes through the upper surface of the supporting boss upward.

[0016] In some embodiments of the present invention, the number of the first mounting parts and the number of the second mounting parts are both two.

[0017] According to the test equipment of the second aspect of the utility model, the test equipment is used to perform stiffness tests on multiple suspensions, and the test equipment includes: the test tooling according to the first aspect of the utility model; a loading device, which is connected to the loading area and is used to apply a load to the suspension through the first fixing member.

[0018] According to the test equipment of the utility model, by setting the test fixture of the first aspect mentioned above, a loading area and a plurality of first mounting parts rotationally symmetrically arranged about the loading area are set in the first fixing member, the plurality of first mounting parts are connected to a plurality of suspended engine connecting parts, and the plurality of second mounting parts of the second fixing member are connected to a plurality of suspended body connecting parts, so that the overall structure is more stable after the test fixture and the suspension are clamped and fixed, and the influence of the deflection torque of the first fixing member during the test is eliminated, so that the natural frequency of the overall structure after the test fixture is clamped and fixed to the suspension is greatly improved, and the high-frequency resonance phenomenon during the test process is greatly improved, so that the suspension stiffness performance test can obtain more accurate data within a higher frequency range, so that the product development and NVH adjustment of the suspension can be carried out smoothly.

[0019] 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

[0020] Figure 1 is a schematic diagram of the test equipment and the suspension assembly according to an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 Schematic diagram of the test equipment and suspension assembly at another angle shown in ;

[0022] Figure 3 is an exploded view of a test device and a suspension according to an embodiment of the utility model;

[0023] Figure 4 is a schematic diagram of a first fixing member according to an embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of a stiffness curve obtained by performing a stiffness performance test of a suspension using an existing scheme and a stiffness curve obtained by performing a stiffness performance test using this scheme.

[0025] Reference numerals:

[0026] 10. Test tooling;

[0027] 11. first fixing member; 111. fixing plate portion; 1111. loading connection hole; 112. first mounting portion; 1121. first mounting hole; 1122. avoidance groove;

[0028] 12, second fixing member; 121, support column; 1211, second mounting hole; 122, support plate; 1221, support boss; 1222, third mounting hole;

[0029] 20. Loading device; 30. Suspension; 31. Vehicle body connection; 32. Engine connection;

[0030] 100. Test equipment. DETAILED DESCRIPTION

[0031] 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 intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] First, refer to Figure 1-Figure 5 The test device 100 according to the second embodiment of the utility model is briefly described as follows: Figure 1 As shown, the test equipment 100 includes a test fixture 10 and a loading device 20 . The test equipment 100 is used to perform a stiffness test on a plurality of suspensions 30 . During the test, the loading device 20 applies a load to the suspension 30 .

[0033] Reference below Figure 1-Figure 5 A test fixture 10 according to an embodiment of the first aspect of the present invention is described.

[0034] like Figure 1-Figure 5As shown, the suspension 30 has a vehicle body connection portion 31 and an engine connection portion 32 , and the test fixture 10 includes: a first fixing member 11 and a second fixing member 12 .

[0035] Specifically, the first fixing member 11 is provided with a loading area and a plurality of first mounting portions 112, the plurality of first mounting portions 112 are rotationally symmetrically arranged about the loading area, the plurality of first mounting portions 112 correspond one-to-one to the plurality of suspensions 30 and are used to be connected to the engine connecting portions 32 of the corresponding suspensions 30; the second fixing member 12 is arranged on the lower side of the first fixing member 11, the second fixing member 12 is provided with a plurality of second mounting portions, the plurality of second mounting portions correspond one-to-one to the plurality of suspensions 30 and are used to be connected to the vehicle body connecting portions 31 of the corresponding suspensions 30.

[0036] In this embodiment, the first fixing member 11 is provided with a plurality of first mounting portions 112 which are arranged rotationally symmetrically about the loading area. The plurality of first mounting portions 112 correspond to the plurality of suspensions 30 one by one and are connected to the engine connection portions 32 on the corresponding suspensions 30. The first fixing member 11 has a simple structure and can be stably and reliably connected and fixed to the plurality of suspensions 30 through the plurality of first mounting portions 112, which facilitates the stiffness test of the suspensions 30. The second fixing member 12 is arranged at the lower side of the first fixing member 11, and can cooperate with the first fixing member 11 to move the plurality of suspensions 30 in the up and down directions (such as Figure 1 The plurality of suspensions 30 are well supported and clamped in the vertical direction (as shown), so that the plurality of suspensions 30 can be relatively stably and securely fixed on the test fixture 10 for testing.

[0037] The second fixing member 12 is provided with a plurality of second mounting portions, and the plurality of second mounting portions are used to be connected with the corresponding vehicle body connecting portions 31 of the suspension 30 , so that the vehicle body connecting portions 31 of the suspension 30 can be stably fixed on the second fixing member 12 .

[0038] It can be understood that the suspension 30 is connected to the vehicle body through the vehicle body connection part 31 in the vehicle, and the suspension 30 is connected to the engine through the engine connection part 32. In this embodiment, the first fixing part 11 of the test fixture 10 is connected and fixed to the engine connection part 32, and the second fixing part 12 is connected and fixed to the vehicle body connection part 31. This can better restore the connection and fixing state of the suspension 30 in the vehicle. By setting a loading area on the first fixing part 11, the first fixing part 11 reciprocates in the up and down directions under the action of the applied load, and then the dynamic stiffness performance of the suspension 30 is tested, so that the stiffness performance test of the suspension 30 can be carried out well and stably.

[0039] It is understandable that when the vehicle is actually running, the engine often has a variety of operating conditions, the vibration frequency generated by the engine is constantly changing, and the requirements for the dynamic stiffness performance of the suspension 30 at different frequencies are also different. Therefore, when testing the dynamic stiffness of the suspension 30, it is necessary to examine the dynamic stiffness of the suspension 30 at different frequencies, so as to optimize the suspension 30. When the frequency range of the investigation covers the natural frequency of the test fixture 10, resonance will occur during the dynamic stiffness test, causing the obtained dynamic stiffness curve to have obvious abnormal fluctuations, making the data obtained from the test abnormal, which in turn affects the evaluation of the performance of the suspension 30.

[0040] The natural frequency of the test fixture 10 refers to the natural frequency of the overall structure formed after the first fixing member 11, the second fixing member 12 and the suspension 30 are clamped and fixed. The natural frequency is often affected by the stiffness distribution and mass distribution of the structure. When the stiffness distribution and mass distribution of the structure are relatively uniform and the overall structure is relatively stable, its natural frequency is higher.

[0041] refer to Figure 1-Figure 3 As shown, in this embodiment, the multiple first mounting portions 112 of the first fixing member 11 are arranged rotationally symmetrically about the loading area. After the first fixing member 11 and the second fixing member 12 and the multiple suspensions 30 are clamped and fixed, the multiple engine connecting portions 32 of the suspension 30 are also arranged rotationally symmetrically about the loading area, that is, the multiple suspensions 30 can be arranged rotationally symmetrically about the loading area of ​​the first fixing member 11, so that the overall structure of the test fixture 10 and the multiple suspensions 30 is relatively stable after clamping and fixing, so that the test fixture 10 has a higher natural frequency after clamping and fixing the suspension 30.

[0042] During the test, the loading area on the first fixing member 11 moves up and down under the action of the load and applies load to the multiple engine connecting parts 32 of the suspension 30. Since the engine connecting parts 32 are rotationally symmetrical about the loading area, the loading axis of the load coincides with the symmetry center axis of the suspension 30, so that the flipping moments generated by the first fixing member 11 under the action of the load during the reciprocating movement cancel each other out, thereby eliminating the influence of the flipping moment, reducing or avoiding the possibility of flipping of the first fixing member 11, and thus improving the stability of the test fixture 10 during the test, so that the natural frequency of the test fixture 10 is greatly improved, and the test fixture 10 will not resonate within the frequency range of the test, so that the stiffness performance test of the suspension 30 can also obtain more accurate data within a higher frequency range.

[0043] According to the test fixture 10 of the embodiment of the utility model, a loading area and a plurality of first mounting portions 112 rotationally symmetrically arranged about the loading area are provided in the first fixing member 11, the plurality of first mounting portions 112 are connected to the engine connecting portions 32 of the plurality of suspensions 30, and the plurality of second mounting portions of the second fixing member 12 are connected to the vehicle body connecting portions 31 of the plurality of suspensions 30, so that the overall structure is more stable after the test fixture 10 is clamped and fixed to the suspension 30, and the influence of the deflection torque occurring during the test by the first fixing member 11 is eliminated, and the natural frequency of the overall structure is greatly improved after the test fixture 10 is clamped and fixed to the suspension 30, and the high-frequency resonance phenomenon during the test is greatly improved, so that the stiffness performance test of the suspension 30 can also obtain relatively accurate data within a higher frequency range.

[0044] In some embodiments of the present invention, Figure 3 As shown, the loading area may be formed with a loading connection hole 1111 for connecting the loading device 20 , the loading connection hole 1111 extends vertically, and the plurality of first mounting portions 112 are rotationally symmetric about the central axis of the loading connection hole 1111 .

[0045] A loading connection hole 1111 is provided in the loading area to facilitate the connection between the first fixing member 11 and the loading device 20, so that the test fixture 10 and the loading device 20 are assembled more conveniently and easily. The plurality of first mounting portions 112 are rotationally symmetrical about the central axis of the loading connection hole 1111. For example, two, four, or other first mounting portions 112 may be provided that are rotationally symmetrical about the central axis of the loading connection hole 1111. Optionally, the loading connection hole 1111 may be formed as a threaded hole, and the first fixing member 11 may be threadedly connected to the loading device 20.

[0046] In some embodiments of the present invention, Figure 3 As shown, the first fixing member 11 may be rotationally symmetric with respect to the loading area.

[0047] The first fixing member 11 is set to be rotationally symmetrical about the loading area, and the first fixing member 11 is formed as a rotationally symmetrical structure as a whole. When the loading device 20 applies a load to the first fixing member 11, the load is applied to the part of the first fixing member 11 that is on the rotation center axis, so that the rotationally symmetrical parts of the first fixing member 11 are subjected to the same force, and the first fixing member 11 is subjected to a more uniform force as a whole. After the first fixing member 11 is fixedly connected to the multiple suspensions 30, the first fixing member 11 can move stably and reliably during the process of reciprocating movement under the action of the load, so that the test device has a higher natural frequency, so that the dynamic stiffness test of the suspension 30 maintains good test accuracy within a higher frequency range.

[0048] In some embodiments of the present invention, reference Figure 3As shown, the number of the first mounting portions 112 and the number of the second mounting portions can both be two.

[0049] In this embodiment, the number of the first mounting parts 112 and the number of the second mounting parts are both set to two, and the test fixture 10 is tested using two suspensions 30. Figure 2 As shown in the figure, the straight line L is schematically represented as the rotational symmetry axis of the first fixing member 11, the straight line L1 is schematically represented as the center line of the first mounting portion 112, and the straight line L2 is schematically represented as the center line of another first mounting portion 112. Since the first mounting portion 112 is rotationally symmetrically arranged about the loading area, the spacing between the straight line L1 and the straight line L is the same as the spacing between the straight line L2 and the straight line L. During the test, the loading device 20 applies a load to the first fixing member 11 along the straight line L. In order to simplify the description, the loading device 20 is configured to apply a downward force to the first fixing member 11, and the force is recorded as F. The reaction force of the engine connecting portion 32 on the first mounting portion 112 at the straight line L1 is recorded as F1, and the reaction force of the engine connecting portion 32 on the first mounting portion 112 at the straight line L2 is recorded as F2, and F1 and F2 are of the same magnitude.

[0050] Under the action of the reaction force F1, the first mounting portion 112 at the straight line L1 deflects upward, and the first mounting portion 112 at the straight line L2 deflects downward. At this time, the reaction force F2 applied to the first mounting portion 112 at the straight line L2 suppresses and offsets the deflection of the first mounting portion 112. As a result, the first fixing member 11 can avoid deflection during the reciprocating motion, thereby avoiding the influence of the deflection torque on the natural frequency of the test fixture 10, and the natural frequency of the overall structure after the test fixture 10 is clamped and fixed to the suspension 30 is greatly improved.

[0051] In some embodiments of the present invention, Figure 3 and Figure 4 As shown, the first fixing member 11 may include a horizontally arranged fixing plate portion 111, the first mounting portion 112 is columnar and connected to the lower surface of the fixing plate portion 111 and extends downward, a plurality of first mounting holes 1121 are formed on the first mounting portion 112, the first mounting holes 1121 extend vertically and pass through the lower end surface of the first mounting portion 112, and the plurality of first mounting holes 1121 are arranged at intervals in a horizontal plane.

[0052] In this embodiment, a fixing plate portion 111 is provided on the first fixing member 11, and a first mounting portion 112 is connected to the lower side of the fixing plate portion 111 and extends downward, so that the connection and fixation of the multiple first mounting portions 112 on the first fixing member 11 are more compact and have better integrity, so that the first fixing member 11 can stably bear the load and reciprocate reliably for testing, which can improve the natural frequency of the first fixing member 11 to a certain extent, so that the natural frequency of the test fixture 10 can be improved to a certain extent, thereby allowing the test to be carried out more smoothly.

[0053] In this embodiment, the first mounting portion 112 is formed with a plurality of first mounting holes 1121, which can be conveniently matched and fixed with the engine connecting portion 32 on the suspension 30. The first mounting portion 112 can be connected and fixed with the engine connecting portion 32 on the suspension 30 through the plurality of first mounting holes 1121 by fasteners, and the connection and fixing are convenient, which is convenient for assembly and disassembly during testing. For example, the first mounting holes 1121 can be provided with two, three, four, etc., and the number of the first mounting holes 1121 can be set accordingly according to the number of holes on the engine connecting portion 32 on the suspension 30.

[0054] In one embodiment of the present invention, reference Figure 1 and Figure 4 As shown, a side surface of the first mounting portion 112 facing the suspension 30 may be formed with an avoidance groove 1122 , which extends vertically and passes through the lower edge of the first mounting portion 112 . The avoidance groove 1122 may be one or a plurality of avoidance grooves arranged at intervals.

[0055] An avoidance groove 1122 is formed on the surface of the first mounting portion 112 on one side facing the suspension 30, which can provide avoidance space for some structures on the suspension 30, such as the reinforcing ribs at the engine connection portion 32 on the suspension 30, so that when the test fixture 10 clamps and fixes the suspension 30, the first fixing member 11 can be connected and fixed to the suspension 30 more conveniently and reliably. For example, one avoidance groove 1122 can be provided, and two, three, four, etc. avoidance grooves 1122 can also be provided. The number of avoidance grooves 1122 can be reasonably set according to the specific structure of the suspension 30 and the avoidance needs, and the shape of the avoidance groove 1122 can also be adaptively adjusted according to the avoidance needs.

[0056] In some embodiments of the present invention, reference Figure 1 and Figure 3 As shown, the second fixing members 12 may be arranged symmetrically with respect to the loading area.

[0057] It can be understood that when the test fixture 10 and the suspension 30 are clamped and fixed, since the two first mounting portions 112 of the first fixing member 11 are arranged rotationally symmetrically with respect to the loading area, the first mounting portions 112 are connected and fixed to the engine connecting portion 32 of the suspension 30, so that the two suspensions 30 are also rotationally symmetrical with respect to the loading area when arranged, and thus the body connecting portion 31 of the suspension 30 is also rotationally symmetrical with respect to the loading area.

[0058] In this embodiment, the second fixing member 12 is arranged symmetrically about the loading area, so that the second fixing member 12 can be connected and fixed to the body connection parts 31 of the two suspensions 30 more conveniently, and the connection and fixation of the second fixing member 12 to the body connection parts 31 is more stable, and the support is more convenient and reliable. During the test, the second fixing member 12 can stably support and fix the suspension 30, and to a certain extent, it can improve the natural frequency of the overall structure after the test fixture 10 clamps and fixes the suspension 30, so that the stiffness performance test of the suspension 30 will not resonate in a higher frequency range, thereby ensuring the accuracy of the data within the test frequency range. Optionally, the second fixing member 12 can be arranged symmetrically about the loading area axis, and the second fixing member 12 can also be arranged symmetrically about the center of the loading area.

[0059] In some embodiments of the present invention, Figure 3 As shown, the second fixing member 12 may include a support plate 122 and a plurality of support columns 121, the support plate 122 is horizontally arranged, the plurality of support columns 121 are connected to the support plate 122 and extend vertically upward, and the second mounting portion may include: a second mounting hole 1211 and a third mounting hole 1222, the second mounting hole 1211 is formed at the upper end of the support column 121, and the third mounting hole 1222 is formed on the support plate 122.

[0060] In this embodiment, a support plate 122 and a support column 121 are provided. The support column 121 is connected to the support plate 122 and extends vertically upward. A second mounting hole 1211 is provided on the support column 121, so that the support column 121 can be well connected and fixed to the vehicle body connection part 31 at the upper end of the suspension 30. A third mounting hole 1222 is provided on the support plate 122, which can be well connected and fixed to the vehicle body connection part 31 at the bottom of the suspension 30, so that the second fixing member 12 can be reliably and stably connected and fixed to the vehicle body connection part 31 of the suspension 30. The support plate 122 cooperates with the support column 121 to provide a more stable supporting and fixing effect on the suspension 30, and the second fixing member 12 and the first fixing member 11 can cooperate to stably and reliably clamp and fix the suspension 30.

[0061] In one embodiment of the present invention, Figure 3As shown, a raised support boss 1221 may be formed on the upper surface of the support plate 122 , and the support boss 1221 corresponds to the third mounting hole 1222 one by one, and the third mounting hole 1222 passes through the upper surface of the support boss 1221 upward.

[0062] In this embodiment, the support boss 1221 can cooperate with the bottom end surface of the vehicle body mounting plate of the suspension 30, so that the suspension 30 can be stably and securely fixed on the support plate 122, thereby making the support and fixation of the suspension 30 by the second fixing member 12 more stable. The support boss 1221 has a simple structure and good use effect.

[0063] Reference below Figure 1-Figure 5 A test device 100 according to an embodiment of the second aspect of the present invention is described.

[0064] like Figure 1-Figure 5 As shown, the test equipment 100 is used to perform stiffness tests on multiple suspensions 30 , and the test equipment 100 includes: a test fixture 10 and a loading device 20 according to an embodiment of the first aspect of the utility model, and the loading device 20 is connected to the loading area and is used to apply a load to the suspension 30 through the first fixing member 11 .

[0065] According to the test equipment 100 of the embodiment of the utility model, by setting the test fixture 10 of the first aspect embodiment mentioned above, a loading area and a plurality of first mounting portions 112 rotationally symmetrically arranged about the loading area are set in the first fixing member 11, the plurality of first mounting portions 112 are connected to the engine connecting portions 32 of the plurality of suspensions 30, and the plurality of second mounting portions of the second fixing member 12 are connected to the vehicle body connecting portions 31 of the plurality of suspensions 30, so that the overall structure is more stable after the test fixture 10 is clamped and fixed to the suspension 30, and the influence of the deflection torque occurring during the test by the first fixing member 11 is eliminated, so that the natural frequency of the overall structure is greatly improved after the test fixture 10 is clamped and fixed to the suspension 30, and the high-frequency resonance phenomenon during the test is greatly improved, so that the stiffness performance test of the suspension 30 can obtain more accurate data within a higher frequency range.

[0066] The following will refer to Figure 1-Figure 5 A testing device 100 according to a specific embodiment of the present invention is described.

[0067] like Figure 1-Figure 5 As shown, the testing device 100 includes a loading device 20 and a testing fixture 10. The testing fixture 10 includes a first fixing member 11 and a second fixing member 12.

[0068] The first fixing member 11 is a rotationally symmetrical member, and the first fixing member 11 includes a fixing plate portion 111 and a first mounting portion 112. The fixing plate portion 111 is horizontally arranged and forms a loading area at the position of the rotation axis. The loading area is provided with a loading connection hole 1111. The axis of the loading connection hole 1111 is colinear with the rotation center axis of the first fixing member 11. Two first mounting portions 112 are provided. The first mounting portions 112 are connected to the lower side of the fixing plate portion 111 and extend downward. A side surface of the first mounting portion 112 facing the suspension 30 forms an avoidance groove 1122, and three first mounting holes 1121 are formed at the bottom end of the first mounting portion 112.

[0069] The second fixing member 12 includes a support plate 122 and a support column 121. The support plate 122 is horizontally arranged, and there are two support columns 121. The second fixing member 12 composed of the two support columns 121 and the support plate 122 is rotationally symmetrically arranged about the axis of the loading connection hole 1111. A second mounting hole 1211 is formed at the upper end of the support column 121, and a supporting boss 1221 is formed on the upper side surface of the support plate 122. A third mounting hole 1222 is provided on the support boss 1221.

[0070] The loading device 20 is screwed and fixed to the loading connection hole 1111 of the first fixing member 11, and the multiple first mounting holes 1121 of the first fixing member 11 correspond to the holes on the engine connection part 32 of the suspension 30 one by one and are fixedly connected by bolts, the second mounting hole 1211 on the support column 121 corresponds to the vehicle body connection part 31 at the upper end of the suspension 30 and is fixedly connected by bolts, and the third mounting hole 1222 on the support plate 122 corresponds to the vehicle body connection part 31 at the bottom of the suspension 30 and is fixedly connected by bolts. The support plate 122 is also provided with fixing holes for fixing on the test platform of the test equipment 100.

[0071] This embodiment utilizes a centrally symmetrical arrangement to eliminate the influence of the overturning torque that occurs when the test fixture 10 and the suspension 30 are clamped and fixed for testing, so that the natural frequency of the overall structure is greatly improved after the test fixture 10 and the suspension 30 are clamped and fixed, and thus the suspension 30 will not resonate when tested within a higher frequency range, thereby allowing the stiffness performance test of the suspension 30 to be well carried out.

[0072] like Figure 5As shown in the figure, curve la is a curve of the stiffness change of the suspension 30 with the frequency in the existing test. It can be seen from the figure that when the frequency is between 100Hz-160Hz, resonance occurs during the test process, and curve la shows relatively abnormal changes. At this time, the dynamic stiffness performance data of the suspension 30 obtained is inaccurate and cannot be used as a reference for product development and NVH adjustment of the suspension 30; curve lb in the figure is a curve obtained by using the test fixture 10 of the embodiment of the present scheme to perform a performance test on the suspension 30. It can be seen from the figure that within the frequency range where the original resonance occurs, no resonance occurs after using the test equipment 100 of the present embodiment, and the stiffness data of the suspension 30 obtained is relatively accurate, which can facilitate the smooth development of the suspension 30 product and NVH adjustment.

[0073] It is understandable that in this solution, two suspensions 30 are used for testing. Since no resonance occurs in a lower frequency range, the existing testing equipment 100 can be used to test the stiffness performance of a single suspension 30 in a lower frequency range, so that accurate stiffness data can be obtained. In a higher frequency range, this solution performs data processing in the following manner to obtain stiffness data of a single suspension 30:

[0074] First, the mounts A and B used for testing in this embodiment are subjected to stiffness performance tests using the existing scheme to obtain the static stiffness and dynamic stiffness data of the mounts A and B within a relatively low frequency range (within 50 Hz), wherein the dynamic stiffness of the mount A at a frequency of i Hz is recorded as a i , the dynamic stiffness of the mount B is denoted as b i , set a within the range of 1Hz-50Hz i / (a i +b i ) is recorded as c, and b is recorded as c in the range of 1Hz-50Hz. i / (a i +b i ) is recorded as d.

[0075] Secondly, the test equipment 100 of the present solution is used to test the suspension A and the suspension B, and the total stiffness performance parameters of the suspension 30 obtained in the higher frequency range are recorded, wherein the total dynamic stiffness of the suspension 30 at a frequency of i Hz is recorded as K i Then, the real dynamic stiffness of the mount A at frequency i is calculated as K i *c, the real dynamic stiffness of the mount B at frequency i is K i *d.

[0076] In the description of the present invention, it should be understood 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 orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0078] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0080] 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 test tool, characterized in that: The test fixture is used to perform stiffness tests on a plurality of suspensions, wherein the suspensions have a vehicle body connection portion and an engine connection portion, and the test fixture comprises: a first fixing member, the first fixing member being provided with a loading area and a plurality of first mounting portions, the plurality of first mounting portions being arranged rotationally symmetrically with respect to the loading area, the plurality of first mounting portions corresponding one-to-one to the plurality of suspensions and being used to be connected to the engine connecting portions of the corresponding suspensions; The second fixing member is arranged at the lower side of the first fixing member, and the second fixing member is provided with a plurality of second mounting portions, and the plurality of second mounting portions correspond one-to-one to the plurality of suspensions and are used to be connected to the vehicle body connecting portions of the corresponding suspensions.

2. The test tool according to claim 1, characterized in that: The loading area is formed with a loading connection hole for connecting a loading device, the loading connection hole extends vertically, and the plurality of first mounting portions are rotationally symmetrical about a central axis of the loading connection hole.

3. The test tool according to claim 1, characterized in that: The first fixing member is rotationally symmetric with respect to the loading area.

4. The test tool according to claim 1, characterized in that: The first fixing member includes a horizontally arranged fixing plate portion, the first mounting portion is columnar and is connected to the lower surface of the fixing plate portion and extends downward, a plurality of first mounting holes are formed on the first mounting portion, the first mounting holes extend vertically and pass through the lower end surface of the first mounting portion, and the plurality of first mounting holes are arranged at intervals in a horizontal plane.

5. The test tool according to claim 4, characterized in that: A evacuation groove is formed on a surface of one side of the first mounting portion facing the suspension. The evacuation groove extends vertically and passes through the lower edge of the first mounting portion. The evacuation groove is one or a plurality of evacuation grooves arranged at intervals.

6. The test tool according to claim 1, characterized in that: The second fixing member is arranged symmetrically with respect to the loading area.

7. The test tool according to claim 1, characterized in that: The second fixing member includes a support plate and a plurality of support columns, the support plate is arranged horizontally, and the plurality of support columns are connected to the support plate and extend vertically upward. The second mounting portion includes: a second mounting hole and a third mounting hole, the second mounting hole is formed at the upper end of the support column, and the third mounting hole is formed on the support plate.

8. The test tool according to claim 7, characterized in that: A raised supporting boss is formed on the upper surface of the supporting plate, and the supporting boss corresponds to the third mounting hole one by one, and the third mounting hole passes through the upper surface of the supporting boss upward.

9. The test tool according to claim 1, characterized in that: The number of the first mounting parts and the number of the second mounting parts are both two.

10. A testing device, characterized in that: The testing device is used to perform stiffness testing on a plurality of suspensions, and the testing device comprises: The test tool according to any one of claims 1 to 9; A loading device is connected to the loading area and is used to apply a load to the suspension through the first fixing member.

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