Sealing performance testing tool, testing device and testing method

Abstract

The invention is suitable for the technical field of waterproof sealing, and provides a sealing performance testing tool, a testing device and a testing method.The sealing performance testing tool comprises a first shell and a second shell, and the first shell is provided with a first face; the second shell is provided with a second surface, the second surface is opposite to the first surface, and a first gap is formed between the second surface and the first surface; the first shell and the second shell are detachably connected, a test cavity is defined between the first shell and the second shell, and the first gap is communicated with the test cavity. The sealing performance test tool provided by the invention can realize the detection of the sealing performance between the sliding plate chassis and the upper vehicle body of the vehicle.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waterproof sealing, more particularly to a sealing performance test tool, test device and test method. BACKGROUND

[0002] In the related art, most of the vehicle bodies and chassis are integrated structures. With the development of the vehicle field technology, a chassis, referred to as a slide plate chassis, has appeared, which is independent of the vehicle body, i.e., the chassis and the vehicle body are separate structures, realizing the up-down separation decoupling development of the chassis and the vehicle body.

[0003] The sealing between the chassis and the vehicle body is usually performed by using a sealing element, and the sealing performance between the chassis and the vehicle body has an influence on the safety, durability and comfort of the vehicle. In the actual production process, it is difficult to detect the sealing performance between the chassis and the vehicle body because the chassis and the vehicle body are large structures. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a sealing performance test tool, test device and test method, aiming to solve the technical problem that the sealing performance between the vehicle body and the chassis is difficult to detect in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present application is:

[0006] In a first aspect, a sealing performance test tool is provided, comprising:

[0007] A first shell, the first shell having a first surface, the first surface being used to simulate a connecting surface of a chassis for connecting with a vehicle body;

[0008] A second shell, the second shell having a second surface, the second surface being used to simulate a connecting surface of a vehicle body for connecting with a chassis, the second surface being oppositely arranged with the first surface, and a first gap being formed between the second surface and the first surface;

[0009] The first shell and the second shell are detachably connected, a test cavity is formed around the first shell and the second shell, and the first gap is in communication with the test cavity.

[0010] The sealing performance test tool can simulate at least part of the connecting surface of the chassis for connecting with the vehicle body through the first surface of the first shell, simulate at least part of the connecting surface of the vehicle body for connecting with the chassis through the second surface of the second shell, and simulate at least part of the gap between the chassis and the vehicle body through the first gap. The sealing performance test tool can be used for waterproof test. The sealing member for being installed between the sealing interface of the chassis and the vehicle body is installed in the first gap, so that the sealing performance test tool can simulate the state after the sealing member is installed between the chassis and the vehicle body, and the sealing performance test of the sealing performance test tool can be performed. In the waterproof test, whether the sealing member is well sealed in waterproof performance between the first shell and the second shell can be judged by whether there is water in the test cavity, and the test structure can be used for evaluating the sealing performance between the vehicle body and the chassis. The sealing performance test tool can simulate the vehicle body and the chassis, so that the waterproof test of the vehicle body and the chassis does not need to be directly performed, and the test process is more convenient and simple.

[0011] In a possible design, the first gap has a flat area, and the areas of the first surface and the second surface opposite to the flat area are flat surfaces.

[0012] In this arrangement, the flat surface of the vehicle body and the flat surface of the chassis form a flat area. The flat area of the sealing performance test tool can simulate the flat area between the vehicle body and the chassis, so that the sealing performance between the vehicle body and the chassis with the flat area can be evaluated.

[0013] In a possible design, the first gap has a first slope area, the areas of the first surface and the second surface opposite to the first slope are first slopes, and the first slopes are oppositely inclined to the flat surface.

[0014] In this arrangement, the first slope area of the sealing performance test tool can simulate the first slope area between the vehicle body and the chassis, so that the sealing performance between the vehicle body and the chassis with the first slope area can be evaluated.

[0015] In a possible design, the first gap has a second slope area, the areas of the first surface and the second surface opposite to the second slope area are second slopes, the second slopes are oppositely inclined to the flat surface, and the second slopes are oppositely inclined to the first slopes.

[0016] In this arrangement, the first slope area and the second slope area of the sealing performance test tool can simulate the first slope area and the second slope area between the vehicle body and the chassis with different inclination directions, so that the sealing performance between the vehicle body and the chassis with the first slope area and the second slope area with different inclination directions can be evaluated.

[0017] In a possible design, the first gap has a stepped region, and at least one of the first surface and the second surface opposite to the stepped region is a stepped surface.

[0018] In this arrangement, the stepped region can simulate the stepped region between the vehicle body and the chassis, so as to evaluate the sealing performance between the vehicle body and the chassis with the stepped region.

[0019] In a possible design, the first gap has a fillet region, and the regions of the first surface and the second surface opposite to the fillet region are both arc surfaces.

[0020] In this arrangement, the fillet region can simulate the fillet region between the vehicle body and the chassis, so as to evaluate the sealing performance between the vehicle body and the chassis with the fillet region.

[0021] In a possible design, the sealing performance test tool further includes a spacer block, the spacer block has a spacer portion, the spacer portion is located between the first surface and the second surface, and the spacer portion is located on the side of the first gap away from the test cavity, and the spacer portion is configured to define the height of the first gap.

[0022] In this arrangement, the spacer portion of the spacer block can keep the height of the first gap stable.

[0023] In a possible design, the sealing performance test tool includes a plurality of spacer block assemblies, one spacer block assembly includes at least one spacer block, the spacer portions of the spacer blocks in the same spacer block assembly have the same height, the spacer portions of the spacer blocks in different spacer block assemblies have different heights, and one of the spacer block assemblies is installed between the first surface and the second surface.

[0024] In this arrangement, the plurality of spacer block assemblies can simulate the state of the sealing member when the first gap is at different heights, so as to detect the waterproof performance of the sealing member in multiple different compression states.

[0025] In a possible design, the number of the spacer block assemblies is three, and the three spacer block assemblies are respectively a first spacer block assembly, a second spacer block assembly, and a third spacer block assembly, the height of the spacer portion in the first spacer block assembly is H1, the height of the spacer portion in the second spacer block assembly is H2, the height of the spacer portion in the third spacer block assembly is H3, the preset value of the height of the first gap is L, the tolerance fluctuation range of the height dimension of the first gap is ±S, and H1=L, H2=L-S, and H3=L+S.

[0026] In this arrangement, the first spacer block assembly simulates the compression state of the sealing member when the first gap is at the preset value, the second spacer block assembly simulates the state of the sealing member when the first gap is at the low value within the error range, and the third spacer block assembly simulates the state of the sealing member when the first gap is at the high value within the error range.

[0027] In a possible design, the spacer assembly includes a plurality of spacers, and the plurality of spacers are arranged in the first gap in a circumferential direction.

[0028] In this arrangement, the plurality of spacers arranged in the gap saves the manufacturing cost of the spacers, and the arrangement of the plurality of spacers facilitates the relative stable connection of the first shell and the second shell.

[0029] In a possible design, the spacer includes a connecting portion connected to the spacer portion, and the first shell is provided with a limiting groove, and the connecting portion is at least partially located in the limiting groove.

[0030] In this arrangement, the connecting portion cooperates with the limiting groove, facilitating the limiting installation of the spacer during the connection of the first shell, the second shell, and the spacer.

[0031] In a possible design, the first shell, the second shell, and the spacer are connected through a locking structure.

[0032] In this arrangement, the first shell, the second shell, and the spacer are connected through the locking structure, so that no structure for connection needs to be installed on the first shell or the second shell, simplifying the structure of the first shell and the second shell.

[0033] In a possible design, the first shell has a first flange, the second shell has a second flange, the first surface is located on a side of the first flange facing the second flange, and the second surface is located on a side of the second flange facing the first flange.

[0034] In this arrangement, the total height of the first flange, the second flange, and the spacer is relatively small, facilitating the connection of the locking structure.

[0035] In a possible design, the first flange is provided with a first assembly hole, the spacer is provided with a second assembly hole, the second flange is provided with a third assembly hole, the first assembly hole, the second assembly hole, and the third assembly hole are in communication with each other, and the locking structure is sequentially arranged in the first assembly hole, the second assembly hole, and the third assembly hole.

[0036] In this arrangement, the locking structure fixes and connects the first flange, the spacer, and the second flange by being arranged in the first assembly hole, the second assembly hole, and the third assembly hole, and the fixing method is simple and convenient.

[0037] In a possible design, the first assembly hole has a first opening, the second assembly hole has a second opening, the third assembly hole has a third opening, the first opening is located on a side edge region of the first flange away from the test cavity, the second opening and the third opening are in communication with the first opening, and the second opening and the third opening are on the same side as the first opening.

[0038] In the arrangement, the locking structure can be pushed into the first assembly hole, the second assembly hole and the third assembly hole from the first opening, the second opening and the third opening, so as to realize quick disassembly and installation of the locking structure.

[0039] In a possible design, the test cavity is provided with a water-color-changing test patch.

[0040] In the arrangement, since the test patch changes color when water enters, whether water enters the test cavity can be intuitively and quickly judged, thereby facilitating evaluation of waterproof performance.

[0041] In a possible design, the test cavity is provided with test patches at a first distance and a second distance from the first gap, and the first distance is less than the second distance.

[0042] In the arrangement, whether the test patch at the first distance changes color and whether the patch at the second distance changes color can be used to conveniently judge the water entry distance in the test cavity.

[0043] In a possible design, the sealing performance test tooling includes a counterweight structure, and the counterweight structure is arranged in the test cavity.

[0044] In the arrangement, the addition of the counterweight structure facilitates keeping the sealing performance test tooling at a set position in water, and the arrangement of the counterweight structure facilitates waterproof testing.

[0045] In a possible design, at least one of the first shell and the second shell is provided with a gas injection hole and a plugging structure, the gas injection hole communicates with the test cavity, and the plugging structure is detachably connected to the gas injection hole and can fit the gas injection hole.

[0046] In the arrangement, the gas injection hole can be used to inflate the test cavity, thereby being used to detect air tightness. After the plugging structure covers the gas injection hole, the sealing test sealing performance test tooling can be used to detect waterproof performance.

[0047] In a second aspect, a test device is provided, including a water tank and the sealing performance test tooling provided in any of the above technical solutions, and the water tank is used to accommodate the sealing performance test tooling.

[0048] In the test device, the water tank is used to accommodate water, and the sealing performance test tooling is used to simulate a vehicle body and a chassis. Waterproof testing of the sealing performance test tooling in the water tank can simulate waterproof testing of the vehicle body and the chassis, thereby realizing evaluation of waterproof performance between the vehicle body and the chassis.

[0049] In a possible design, the water tank and the sealing performance test tooling are detachably connected.

[0050] In this arrangement, the sealing performance test tool is detachably connected with the water tank, so as to facilitate the sealing performance test tool to be kept at a set position in the water tank, and facilitate the waterproof test.

[0051] In a third aspect, a test method is provided, which uses the sealing performance test tool according to any one of the preceding aspects. The method comprises tool installation and waterproof test, wherein,

[0052] The tool installation comprises: fixing the sealing element to the first gap of the sealing performance test tool, and blocking the test cavity into a sealed cavity by the sealing element.

[0053] The waterproof test comprises: placing the sealing performance test tool with the sealing element installed in water, so that the sealing performance test tool with the sealing element installed is located at a first depth in the water; after a first set time, the sealing performance test tool with the sealing element installed is taken out, and whether the test cavity is waterlogged is detected.

[0054] In this test method, the first shell in the sealing performance test tool simulates the chassis, the second shell simulates the vehicle body, the sealing element is installed between the first shell and the second shell, that is, the state of installing the sealing element between the vehicle body and the chassis is simulated, so that the state of installing the sealing element between the vehicle body and the chassis is simulated by the sealing performance test tool with the sealing element installed, and the waterproof test of the sealing performance test tool with the sealing element installed is performed, so as to simulate the waterproof test of the vehicle body, the chassis and the sealing element, and the waterproof performance evaluation of the sealing element between the vehicle body and the chassis can be realized.

[0055] In a possible design, the tool installation further comprises:

[0056] The spacer is installed between the first shell and the second shell, and the spacer, the first shell and the second shell are connected.

[0057] In this test method, the height of the first gap between the first shell and the second shell can be changed by the spacer, so that the waterproof performance of the sealing element in a certain set compression state can be evaluated.

[0058] In a possible design, the first spacer assembly, the second spacer assembly and the third spacer assembly are used for waterproof test respectively.

[0059] The spacer with different heights can simulate the state of the sealing element within the tolerance range, so that more comprehensive waterproof performance evaluation of the sealing element can be performed.

[0060] In a possible design, after the tool installation and before the waterproof test, the method further comprises: performing an environmental test.

[0061] In this test method, the sealing performance test tooling is subjected to environmental testing before the waterproof test, which can simulate the sealing performance between the chassis and the vehicle body after the vehicle is used for a certain period of time.

[0062] In one possible design, the environmental testing includes high-low temperature cycle testing, and the high-low temperature cycle testing includes:

[0063] The sealing performance test tooling with the seal installed is placed in an environment at a plurality of different temperatures for a set time.

[0064] In this test method, the sealing performance test tooling is subjected to environmental testing before the waterproof test, which can simulate the sealing performance between the chassis and the vehicle body after the vehicle is used for a certain period of time.

[0065] In one possible design, the high-low temperature cycle testing includes high-low temperature cycling, and the high-low temperature cycling includes:

[0066] The sealing performance test tooling with the seal installed is placed in a high-temperature environment for a high-temperature dwell time.

[0067] The sealing performance test tooling with the seal installed is placed in a low-temperature environment for a low-temperature dwell time.

[0068] The temperature of the high-temperature environment is greater than the temperature of the low-temperature environment.

[0069] In this test method, the sealing performance test tooling is subjected to environmental testing before the waterproof test, which can simulate the sealing performance between the chassis and the vehicle body after the vehicle is used for a certain period of time.

[0070] In one possible design, the high-low temperature cycle testing includes high-low temperature cycling, and the high-low temperature cycling includes:

[0071] The sealing performance test tooling with the seal installed is placed in a first environment for a first set time.

[0072] The sealing performance test tooling with the seal installed is placed in a second environment for a second set time.

[0073] The sealing performance test tooling with the seal installed is placed in a third environment for a third set time.

[0074] The sealing performance test tooling with the seal installed is placed in a fourth environment for a fourth set time.

[0075] The temperatures of the first environment, the second environment, the third environment, and the fourth environment are different.

[0076] In this test method, the sealing performance test tool is placed in four different temperature environments for a certain period of time before the waterproof test is performed, which can simulate the state of the seal after use at different temperatures, so as to evaluate the waterproof performance of the seal after use in four different temperature environments.

[0077] In a possible design, the high and low temperature cycles are performed sequentially for multiple times.

[0078] In this test method, the state of the seal after relatively longer use can be simulated, so as to evaluate the waterproof performance of the seal after relatively longer use.

[0079] In a possible design, the temperature of the second environment is greater than that of the first environment, the temperature of the third environment is less than that of the first environment, and the temperature of the fourth environment is greater than that of the first environment and less than that of the second environment.

[0080] In this test method, the temperature of the first environment is greater than that of the third environment and less than that of the second and fourth environments, so the first temperature can be set as a reference temperature; the temperature of the second environment is the highest, which can simulate the environment of a high-temperature area of the vehicle (for example, an area where a battery is installed); the temperature of the third environment is low, which can be used to simulate a winter environment; and the temperature of the fourth environment is relatively high, which can be used to simulate a summer environment. In this way, through the four different environments, various different conditions that the vehicle may experience during use can be simulated, so that the waterproof test can be used to evaluate the waterproof performance of the seal between the vehicle body and the chassis after the vehicle has been used for a period of time.

[0081] In a possible design, the temperature of the first environment is 20-28°C, the temperature of the second environment is 60-120°C, the temperature of the third environment is -50 to -10°C, and the temperature of the fourth environment is 45-55°C.

[0082] In this test method, the temperature of the first environment is room temperature, the temperature of the second environment is high temperature, the temperature of the third environment is low temperature, and the temperature of the fourth environment is medium-high temperature. Through the above four different temperature ranges, the temperature range that the vehicle may experience during use can be almost simulated, the matching degree of the environmental test and the actual situation is increased, and the simulation accuracy of the evaluation is improved.

[0083] In a possible design, the temperature of the first environment is 23°C, the temperature of the second environment is 90°C, the temperature of the third environment is -40°C, and the temperature of the fourth environment is 50°C.

[0084] In the test method, the temperature of the first environment is normal temperature, and thus the first environment is used to simulate a normal temperature environment (for example, a spring environment or an autumn environment); the temperature of the second environment is high temperature, and the second environment can be used to simulate an environment of a high heat area of the vehicle (for example, an area where a battery is installed); the temperature of the third environment is low temperature, and the third environment can be used to simulate a winter environment; and the temperature of the fourth environment is relatively high temperature, and the fourth environment can be used to simulate a summer environment. In this way, the four different environments can simulate various different conditions that the vehicle can experience during use, so that the waterproof test can be used to evaluate the waterproof performance of the seal between the vehicle body and the chassis after the vehicle is used for a period of time.

[0085] In a possible design, after the seal performance test tooling installed with the seal is placed in the second environment for a second set time, and before the seal performance test tooling installed with the seal is placed in the third environment, the seal performance test tooling installed with the seal is switched from the third environment to the first environment.

[0086] In the test method, the first environment is used as a reference environment, and after the simulation of the second environment is performed, the seal performance test tooling is switched from the second environment to the first environment, that is, the seal performance test tooling is restored to the reference environment, so as to facilitate subsequent switching of the environment.

[0087] In a possible design, after the seal performance test tooling installed with the seal is placed in the third environment for a third set time, and before the seal performance test tooling installed with the seal is placed in the fourth environment, the seal performance test tooling installed with the seal is switched from the third environment to the first environment.

[0088] In the test method, the first environment is used as a reference environment, and after the simulation of the third environment is performed, the seal performance test tooling is switched from the third environment to the first environment, that is, the seal performance test tooling is restored to the reference environment, so as to facilitate subsequent switching of the environment.

[0089] In a possible design, after the seal performance test tooling installed with the seal is placed in the fourth environment for a fourth set time, the seal performance test tooling installed with the seal is switched from the fourth environment to the first environment.

[0090] In the test method, after the test of the four environments is performed, the environment of the seal performance test tooling is switched to the first environment, so as to facilitate subsequent cyclic tests or subsequent waterproof tests.

[0091] In a possible design, the relative humidity of the first environment, the relative humidity of the second environment, and the relative humidity of the third environment are the same, and the relative humidity of the fourth environment is greater than the relative humidity of the first environment.

[0092] In this kind of test method, not only the environment is controlled from the temperature aspect, but also from the relative humidity aspect, so that the simulation is more close to the actual environment change state of the seal in use.

[0093] In a possible design, after the installation of the tooling, and before the waterproof test, the environmental test is further included, the environmental test includes a high temperature and high humidity test, the high temperature and high humidity test includes: placing the seal performance test tooling on which the seal is installed in a fifth environment for a fifth set time, the temperature of the fifth environment is 83-87℃, and the relative humidity of the fifth environment is 83-87%.

[0094] In this kind of test method, the high temperature and high humidity test is performed on the seal first, and then the waterproof test is performed, so that the waterproof performance of the seal after being in an extremely harsh environment can be detected and evaluated.

[0095] In a possible design, the temperature of the fifth environment is 85℃, and the relative humidity of the fifth environment is 85%.

[0096] In this kind of test method, by simulating the extreme conditions in the high temperature and high humidity test with relatively high temperature and relatively high humidity, the environmental impact that the seal may encounter in long-term use can be simulated, so that the sealing performance of the seal applied between the vehicle body and the chassis can be predicted.

[0097] In a possible design, the fifth set time is equal to or greater than 480h.

[0098] In this kind of test method, the time for the high temperature and high humidity test is relatively longer, so that the waterproof performance of the seal after being used in a harsh environment for a long time can be evaluated.

[0099] In a possible design, the fifth set time is 720h.

[0100] In this kind of test method, the time for the high temperature and high humidity test is longer, so that the environmental test is more severe, and thus the seal that passes the evaluation has better durability.

[0101] In a possible design, after the installation of the tooling, and before the waterproof test, the environmental test is further included, the environmental test includes a salt spray test, the salt spray test includes: placing the seal performance test tooling on which the seal is installed in a sixth environment for a sixth set time, the sixth environment is an environment with neutral salt spray.

[0102] In this kind of test method, the salt spray test is performed on the seal first, and then the waterproof test is performed, so that the waterproof performance of the seal after being in a salt spray environment can be detected and evaluated.

[0103] In a possible design, the sixth set time is equal to or greater than 480 hours.

[0104] In this test method, the time for the salt spray test is relatively long, and the waterproof performance of the seal after long-time use in the salt spray environment can be evaluated.

[0105] In a possible design, the sixth set time is 720 hours.

[0106] In this test method, the longer time makes the salt spray environment more severe, so that the seal that passes the evaluation has better durability.

[0107] In a possible design, after the tooling is installed, and before the waterproof test is performed, the method further includes performing an environmental test, the environmental test including a high-low temperature cycle test, a high temperature and high humidity test, and a salt spray test performed in sequence, or a high temperature and high humidity test, a high-low temperature cycle test, and a salt spray test performed in sequence.

[0108] The high-low temperature cycle test includes ten high-low temperature cycles, and each high-low temperature cycle includes:

[0109] The sealing performance test tooling installed with the seal is placed in the first environment for a first set time;

[0110] The sealing performance test tooling installed with the seal is switched to the second environment and kept in the second environment for a second set time;

[0111] The sealing performance test tooling installed with the seal is switched to the first environment and kept in the first environment for a seventh preset time;

[0112] The sealing performance test tooling installed with the seal is switched to the third environment and kept in the third environment for a third set time;

[0113] The sealing performance test tooling installed with the seal is switched to the first environment and kept in the first environment for a seventh set time;

[0114] The sealing performance test tooling installed with the seal is switched to the fourth environment and kept in the fourth environment for a fourth set time;

[0115] The sealing performance test tooling installed with the seal is switched to the first environment;

[0116] The high temperature and high humidity test includes: the sealing performance test tooling installed with the seal is placed in the fifth environment for a fifth set time, the temperature of the fifth environment is 85°C, and the relative humidity of the fifth environment is 85%;

[0117] The salt spray test comprises: placing the sealing performance test tooling with the seal installed in a sixth environment with a neutral salt spray for a sixth set time.

[0118] In the test method, the sealing performance test tooling is subjected to high-low temperature cycle test, high temperature and high humidity test and salt spray test respectively, and then subjected to waterproof test. The high-low temperature cycle test, high temperature and high humidity test and salt spray test simulate the state of the seal in different environmental conditions, including the state after being subjected to harsh environment, which is closer to the state of the seal in actual use, so that more actual application test results can be obtained, and the waterproof performance of the seal when actually applied between the vehicle body and the chassis can be verified.

[0119] In a possible design, a third gasket assembly is installed between the first shell and the second shell during tooling installation.

[0120] In the test method, since the third gasket assembly is installed between the first shell and the second shell, the height of the first gap is relatively large, and the seal is in an under-pressure state, that is, the seal is in a relatively mild compression state. Since the under-pressure state is more likely to have weaker waterproof performance than the positive pressure state and the over-pressure state, if the seal in the under-pressure state also meets the waterproof standard, the seals in the positive pressure state and the over-pressure state can also be inferred to be able to meet the same waterproof standard, thereby simplifying the test process and improving the test efficiency.

[0121] In a possible design, the temperature of the first environment is 23℃, the relative humidity of the first environment is 50%, and the first set time is 1h;

[0122] The temperature of the second environment is 90℃, the relative humidity of the second environment is 50%, and the second set time is 4h;

[0123] The temperature of the third environment is -40℃, the relative humidity of the third environment is 50%, and the third set time is 4h;

[0124] The temperature of the fourth environment is 50℃, the relative humidity of the fourth environment is 95%, and the fourth set time is 13h;

[0125] The temperature of the fifth environment is 85℃, the relative humidity of the fifth environment is 85%, and the fifth set time is 720h;

[0126] The sixth set time is 720h;

[0127] The seventh set time is 1h.

[0128] In the test method, the environmental test of the tooling is carried out in a relatively large temperature difference environment, the environment state in which the vehicle is more likely to be simulated, the seal between the chassis and the vehicle body can be simulated more close to the actual use state, and more close to the real evaluation data can be obtained. BRIEF DESCRIPTION OF DRAWINGS

[0129] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0130] Figure 1 is a perspective view of the sealing performance test tooling provided by an embodiment of the present application after the sealing element is installed;

[0131] Figure 2 is another perspective view of the sealing performance test tooling provided by an embodiment of the present application after the sealing element is installed;

[0132] Figure 3 is a sectional view along the line A-A in Figure 2

[0133] Figure 4 is an enlarged view of B in Figure 3

[0134] Figure 5 is a schematic view of the relative positions of the first shell and the second shell in the sealing performance test tooling provided by an embodiment of the present application;

[0135] Figure 6 is a perspective view of the first shell in the sealing performance test tooling provided by an embodiment of the present application;

[0136] Figure 7 is another perspective view of the first shell in the sealing performance test tooling provided by an embodiment of the present application;

[0137] Figure 8 is a perspective view of the second shell in the sealing performance test tooling provided by an embodiment of the present application;

[0138] Figure 9 is another perspective view of the second shell in the sealing performance test tooling provided by an embodiment of the present application;

[0139] Figure 10 ​​is a view of the sealing performance test tool provided by an embodiment of the present application from another angle after the sealing member is installed;

[0140] Figure 11 is Figure 10 is an enlarged view of C in FIG. 8;

[0141] Figure 12 is an exploded view of the sealing performance test tool provided by an embodiment of the present application;

[0142] Figure 13 is a view of the cushion block in the sealing performance test tool provided by an embodiment of the present application;

[0143] Figure 14 is another view of the sealing performance test tool provided by an embodiment of the present application from another angle after the sealing member is installed;

[0144] Figure 15 is Figure 14 is an enlarged view of F in FIG. 9;

[0145] Figure 16 is Figure 12 is an enlarged view of D in FIG. 8;

[0146] Figure 17 is Figure 12 is an enlarged view of E in FIG. 8;

[0147] Figure 18 is a view of the counterweight structure in the sealing performance test tool provided by an embodiment of the present application;

[0148] Figure 19 is another view of the second housing in the sealing performance test tool provided by an embodiment of the present application;

[0149] Figure 20 is a view of the assembly process of the sealing performance test tool and the sealing member provided by an embodiment of the present application;

[0150] Figure 21 is a view of the test device provided by an embodiment of the present application;

[0151] Figure 22 is a flowchart of the test method provided by an embodiment of the present application Figure 1 ;

[0152] Figure 23 is a flowchart of the test method provided by an embodiment of the present application Figure 2 ;

[0153] Figure 24 is a flowchart of the test method provided by an embodiment of the present applicationFigure 3 .

[0154] The label details involved in the above drawings are as follows:

[0155] 1-sealing performance test tool; 2-seal; 3-water tank; 4-water; 10-first shell; 11-first surface; 12-first flange; 13-first assembly hole; 14-limiting groove; 15-first recess structure; 16-first opening; 20-second shell; 21-second surface; 22-second flange; 23-third assembly hole; 24-third opening; 25-gas injection hole; 26-second recess structure; 30-pad; 31-separation pad; 32-connection part; 33-second assembly hole; 34-second opening; 40-locking structure; 41-bolt; 42-nut; 50-first gap; 51-flat area; 52-first slope area; 53-second slope area; 54-step area; 55-round corner area; 60-test cavity; 70-counterweight structure; 111-flat surface; 112-first slope; 113-second slope; 114-step surface; 115-curved surface. DETAILED DESCRIPTION

[0156] In order to make the technical problems to be solved by the present application, the technical solutions and the beneficial effects clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not intended to limit the present application.

[0157] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two).

[0158] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0159] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated structure or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0160] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0161] In the drawings of the present embodiment, a circle dot arrow points to a structure itself, a solid triangle arrow points to a structure surface, and a hollow triangle arrow points to a region, such as a hole, a groove, an opening, a cavity, etc.

[0162] In a vehicle, there is a chassis designed to be decoupled from a vehicle body. Since the chassis has a shape similar to a skateboard, it is also called a skateboard chassis. The chassis is independent of the vehicle body, that is, the chassis and the vehicle body are a split structure. The chassis and the vehicle body are sealingly connected, and a seal is usually used to seal the chassis and the vehicle body. In an electric vehicle, a battery is usually installed between the chassis and the vehicle body. Therefore, the sealing performance between the chassis and the vehicle body affects the safety, durability, and comfort of the vehicle. For example, the sealing performance includes at least waterproof performance and air tightness. If the waterproof performance between the chassis and the vehicle body is poor, the battery will be exposed to a relatively harsh environment for a long time, affecting the service life of the battery and the safety and durability of the vehicle. If the air tightness between the chassis and the vehicle body is poor, it will increase the noise and vibration in the vehicle, affecting the comfort of the vehicle.

[0163] However, since the chassis and the vehicle body are both large structures, and the assembly of the chassis, the seal, and the vehicle body is larger in size and heavier in weight, it is difficult to move. If the sealing performance between the chassis and the vehicle body is to be detected, a large test site and test equipment are required, and a more complex test operation process is required. In summary, the test of the sealing performance between the chassis and the vehicle body has the defects of large complexity, high difficulty, and large site requirement.

[0164] Based on this, this application provides a sealing performance testing fixture, including a first housing and a second housing. The first housing simulates a chassis, and the second housing simulates a vehicle body. A seal of the same type used for sealing the vehicle body and chassis is installed between the first and second housings, thus simulating the state of the seal being installed between the vehicle body and chassis. In this way, by performing sealing performance testing on the sealing performance testing fixture, the sealing performance of the vehicle body, chassis, and seal can be simulated. Since the first and second housings can be manufactured to relatively small sizes, the space required for sealing performance testing is reduced, and the process of moving the sealing performance testing fixture is simpler and more convenient, making sealing performance testing simpler and more convenient, reducing the difficulty of the test, and facilitating the evaluation of the sealing performance between the vehicle body and chassis.

[0165] The sealing performance testing fixture, testing device, and testing method provided in the embodiments of this application will be explained in detail below.

[0166] like Figures 1 to 9 As shown in the figure, this application embodiment provides a sealing performance testing fixture 1, such as Figures 1 to 4 As shown, the sealing performance testing fixture 1 includes a first housing 10 and a second housing 20. The first housing 10 has a first surface 11; the second housing 20 has a second surface 21, which is disposed opposite to the first surface 11, and a first gap 50 is formed between the second surface 21 and the first surface 11; the first housing 10 and the second housing 20 are detachably connected, and a test cavity 60 is formed between the first housing 10 and the second housing 20, and the first gap 50 communicates with the test cavity 60.

[0167] The first housing 10 has a first surface 11, which simulates at least a portion of the connection surface in the chassis used for sealing connection with the vehicle body. The first surface 11 has at least a portion of the features of the surface in the chassis used for sealing connection with the vehicle body. Since the first surface 11 contains the same structural features as the chassis, it can simulate at least a portion of the connection surface in the chassis used for connection with the vehicle body. This allows the first housing 10 to simulate at least a portion of the chassis, while other structures of the first housing 10, except for the first surface 11, do not need to have the same structure as the chassis, thus greatly simplifying the structure of the first housing 10 compared to the chassis structure. Because the first housing 10 does not need to have the same dimensions as the chassis, it can be manufactured as a relatively small structure, thereby reducing the space occupied by the first housing 10 and reducing its weight.

[0168] The second shell 20 has a second surface 21 which is used to simulate at least part of the connecting surface of the vehicle body for sealing connection with the chassis, and the second surface 21 has at least part of the features of the surface of the vehicle body for sealing connection with the chassis. Since the second shell 20 is provided with at least part of the structural features of the vehicle body in the second surface 21, so that the second shell 20 can simulate at least part of the vehicle body, the structures of the second shell 20 other than the second surface 21 do not need to be provided with the same structures as the vehicle body, so that the structure of the second shell 20 is greatly simplified compared with the vehicle body. Since the second shell 20 does not need to be provided with the same size as the vehicle body, the second shell 20 can be manufactured as a relatively small structure, thereby reducing the occupied space of the second shell 20 and reducing the weight of the second shell 20.

[0169] The first shell 10 and the second shell 20 are detachably connected, and the first shell 10 and the second shell 20 can be connected in any connection mode such as plug-in, clamping, pin connection, bolt 41 connection, clamp connection, etc. After the first shell 10 and the second shell 20 are detached and separated, the sealing element 2 can be installed between the first shell 10 and the second shell 20, the sealing element 2 is installed in the first gap 50, and the sealing element 2 seals the first gap 50, so that the test cavity 60 connected with the first gap 50 is called a closed chamber, so as to facilitate subsequent sealing performance detection. The sealing element 2 between the vehicle body and the chassis is made of the same material and has the same cross-sectional shape and size, and the fixing mode of the sealing element 2 on the first shell 10 and the second shell 20 can also be the same as the fixing mode of the sealing element between the vehicle body and the chassis and the vehicle body or the chassis. The sealing element 2 can be a sealing strip, sealing glue, mastic, etc. The sealing element between the vehicle body and the chassis is a sealing strip, and the sealing part between the vehicle body and the chassis is relatively large, so a sealing strip with a relatively long length is used. The sealing element 2 installed between the first shell 10 and the second shell 20 uses the same sealing strip, but the length of the sealing strip installed between the first shell 10 and the second shell 20 is relatively short. After the first shell 10 and the second shell 20 are connected, the first gap 50 is formed between the first shell 10 and the second shell 20, and the sealing element 2 is sealingly installed in the first gap 50. The opposite sides of the sealing element 2 are in contact with the first surface 11 and the second surface 21, respectively.

[0170] The first shell 10 and the second shell 20 form a test cavity 60. For example, the first shell 10 can be provided with a recessed structure on a side facing the second shell 20, and the second shell 20 is a cover plate structure, which is covered on the opening of the recessed structure, so that the first shell 10 and the second shell 20 form the test cavity 60. Alternatively, the second shell 20 can be provided with a recessed structure on a side facing the first shell 10, and the first shell 10 is a cover plate structure, which is covered on the opening of the recessed structure, so that the first shell 10 and the second shell 20 form the test cavity 60. In another embodiment, as shown in Figure 6 and Figure 8 the first shell 10 is provided with a first recessed structure 15 on a side facing the second shell 20, and the second shell 20 is provided with a second recessed structure 26 on a side facing the first shell 10. When the first shell 10 and the second shell 20 are connected, the first recessed structure 15 and the second recessed structure 26 are communicated, and together form the test cavity 60. The first gap 50 is communicated with the test cavity 60. After the sealing element 2 is installed in the first gap 50, the sealing element 2 seals the test cavity 60 into a sealed chamber.

[0171] In the sealing performance test tool 1, the first shell 10 simulates at least part of the area of the chassis, the second shell 20 simulates at least part of the area of the vehicle body, the first surface 11 simulates at least part of the area of the side of the chassis opposite to the vehicle body, the second surface 21 simulates at least part of the area of the side of the vehicle body opposite to the chassis, and the first gap 50 simulates at least part of the gap between the chassis and the vehicle body. The sealing performance test can be performed by the sealing performance test tool 1, so as to simulate the sealing performance test on at least part of the area between the chassis and the vehicle body. The sealing performance test can be a waterproof test or an air tightness test. For example, when performing the waterproof test, the sealing element 2 to be installed between the sealing interface of the chassis and the vehicle body is installed in the first gap 50, so that the state after the sealing element 2 is installed between the chassis and the vehicle body can be simulated by the sealing performance test tool 1. The sealing performance test is performed on the sealing performance test tool 1. When performing the waterproof test, whether the sealing element 2 has good waterproof performance between the first shell 10 and the second shell 20 can be judged by whether there is water in the test cavity 60, so as to evaluate the sealing performance between the vehicle body and the chassis. The sealing performance test tool 1 can simulate the vehicle body and the chassis, so that the waterproof test of the vehicle body and the chassis does not need to be directly performed, and the test process is more convenient and simple.

[0172] As shown in Figure 5 in some embodiments, the first gap 50 has a flat area 51, as shown in Figure 6 and Figure 7 the area of the first surface 11 opposite to the flat area 51 is a flat surface 111, as shown in Figure 8 andFigure 9 As shown, the region of the second surface 21 opposite to the flat region 51 is a flat surface 111.

[0173] The flat surface 111 refers to a surface parallel to the horizontal surface, and the flat surface 111 extends along a straight line in the horizontal surface.

[0174] The first gap 50 includes a flat region 51, in the flat region 51 of the first gap 50, the first surface 11 and the second surface 21 are both flat surfaces 111, or in other words, the flat surface 111 in the first surface 11 is arranged opposite to the flat surface 111 in the second surface 21, and the region between the flat surface 111 in the first surface 11 and the flat surface 111 in the second surface 21 is the flat region 51. When the sealing element 2 is located in the flat region 51, it can simulate the sealing state of the sealing element 2 located between the vehicle body and the chassis in the flat region 51.

[0175] Since about 50%-70% of the relative region between the vehicle body and the chassis is a flat region 51, by using the first surface 11 and the second surface 21 with flat surfaces 111, at least more than 50%-70% of the relative region between the vehicle body and the chassis can be simulated, so as to obtain an evaluation result closer to the actual sealing performance between the vehicle body and the chassis.

[0176] As shown in the possible design, Figures 5 to 9 The first gap 50 has a first slope region 52, the regions of the first surface 11 and the second surface 21 opposite to the first slope 112 are both first slopes 112, and the first slope 112 is arranged opposite to the flat surface 111.

[0177] The first slope 112 can be an upward slope or a downward slope, and the first slope 112 can extend along a curved path or a straight line. The shape of the first slope 112 in the first surface 11 is matched with the shape of the first slope 112 in the second surface 21, so that the distance between the first surface 11 and the second surface 21 is equal in the first slope region 52, that is, the first gap 50 is an equal-interval gap in the first slope region 52, and the height of the first gap 50 is equal at each position in the first slope region 52.

[0178] In this arrangement, the first slope region 52 can simulate the non-flat region between the vehicle body and the chassis, such as the relative region with a slope, so as to evaluate the sealing performance between the vehicle body and the chassis with the slope region.

[0179] As shown in the possible design, Figures 5 to 9As shown, in one possible design, the first gap 50 has a second slope area 53, and the regions of the first surface 11 and the second surface 21 opposite to the second slope area 53 are both second slope surfaces 113. The second slope surfaces 113 are oppositely inclined to the flat surfaces 111, and the inclination directions of the second slope surfaces 113 are opposite to those of the first slope surfaces 112.

[0180] The inclination directions of the second slope surfaces 113 are opposite to those of the first slope surfaces 112, that is, one of the first slope surfaces 112 and the second slope surfaces 113 is upwardly inclined, and the other is downwardly inclined. The inclination angles of the first slope surfaces 112 and the second slope surfaces 113 can be the same or different.

[0181] In this arrangement, the first slope area 52 and the second slope area 53 with different inclination directions can simulate the first slope area 52 and the second slope area 53 with different inclination directions between the vehicle body and the chassis, so as to evaluate the sealing performance between the vehicle body and the chassis with the first slope area 52 and the second slope area 53 with different inclination directions.

[0182] When the first gap 50 has the flat area, the first slope area 52 and the second slope area 53, the first slope area 52 and the second slope area 53 can be connected to each other, or can be arranged separately, for example, the first slope area 52 and the second slope area 53 are respectively located on the two sides of the flat area. The first gap 50 can be a closed ring, and the number of the first slope area 52, the second slope area 53 and the flat area can be one or more.

[0183] In one possible design, the first gap 50 has a stepped area 54, and the regions of the first surface 11 and the second surface 21 opposite to the stepped area 54 are stepped surfaces 114. The stepped surfaces 114 include at least two stepped surfaces with different heights, and a connecting surface connecting the adjacent two stepped surfaces. The two stepped surfaces can be parallel or not parallel, and the connecting surface is oppositely inclined to the stepped surfaces. For example, two flat areas 51 are connected by a first slope area 52 (or a second slope area 53), and the two flat areas 51 and the first slope area 52 (or the second slope area 53) located between the two flat areas 51 can jointly form a stepped area 54.

[0184] In this arrangement, the stepped area 54 can simulate the stepped area 54 between the vehicle body and the chassis, so as to evaluate the sealing performance between the vehicle body and the chassis with the stepped area 54.

[0185] As shown in Figure 6 and Figure 8 In one possible design, the first gap 50 has a rounded corner area 55, and the regions of the first surface 11 and the second surface 21 opposite to the rounded corner area 55 are both arc surfaces 115.

[0186] The extending path of the arc surface 115 is arc-shaped, which can be a circular arc or a non-circular arc. The arc surface 115 can be parallel to the horizontal plane or not parallel to the horizontal plane. The fillet region 55 can be used to connect any two adjacent regions among the planar region, the first slope region 52, the second slope region 53, and the step region 54.

[0187] In this arrangement, the fillet region 55 can simulate the fillet region 55 between the vehicle body and the chassis, so as to evaluate the sealing performance between the vehicle body and the chassis with the fillet region 55.

[0188] In an example, the first gap 50 includes two flat regions 51 and two step regions 54, the two flat regions 51 are oppositely arranged, the two step regions 54 are oppositely arranged, the two flat regions 51 and the two step regions 54 are alternately arranged in the horizontal projection circumferential direction, one of the first slope region 52 and the second slope region 53 is arranged between the adjacent flat region 51 and the step region 54, the two sides of each flat region 51 are respectively the first slope region 52 and the second slope region 53, the two sides of each step region 54 are respectively the first slope region 52 and the second slope region 53, the flat region 51 and the first slope region 52, the flat region 51 and the second slope region 53, the step region 54 and the first slope region 52, and the step region 54 and the second slope region 53 are connected by the fillet region 55. In this arrangement, the installation region of the sealing element 2 formed by the first gap 50 has both horizontal features (flat regions 51) and non-horizontal features (first slope regions 52, second slope regions 53, circular arc regions, and step regions 54), so that the sealing performance test tool 1 can be more close to the features that may appear in the installation region between the vehicle body and the chassis for installing the sealing element 2, so that the sealing performance test tool 1 is more close to the design features of the actual vehicle, and thus the sealing test result is more consistent with the sealing performance of the actual vehicle.

[0189] In a possible design, as shown in Figure 10 and Figure 11 The sealing performance test tool 1 further includes a spacer 30, the spacer 30 has a spacer portion 31, the spacer portion 31 is located between the first surface 11 and the second surface 21, the spacer portion 31 is located on the side of the sealing element 2 away from the first gap 50, and the spacer portion 31 is used to define the height of the first gap 50.

[0190] The cushion block 30 is in a block structure. When the sealing element 2 is installed in the first gap 50, the cushion block 30 is located on the side of the sealing element 2 away from the test cavity 60. When the sealing element 2 is in a closed ring structure, the sealing element 2 is arranged around the test cavity 60. The side close to the test cavity 60 is the inner side of the sealing element 2, and the side away from the test cavity 60 is the outer side of the sealing element 2. The cushion block 30 is located on the outer side of the sealing element 2. The spacer part 31 is at least a part of the structure of the cushion block 30. The spacer part 31 is located between the first face 11 and the second face 21. The spacer part 31 is in contact with the first face 11 and the second face 21 respectively. The spacer part 31 is supported between the first face 11 and the second face 21, so that the distance between the first face 11 and the second face 21 is the height of the spacer part 31, and the height of the first gap 50 is the height of the spacer part 31. By selecting the cushion block 30 with the spacer part 31 of the set height to be installed between the first shell 10 and the second shell 20, the height of the first gap 50 is kept at the set height. In this way, in actual application, different cushion blocks 30 can be manufactured by adapting to the height of the gap between the body and the chassis of different models of vehicles. By installing the corresponding cushion block 30 between the first shell 10 and the second shell 20, the first gap 50 of the sealing performance test tool 1 can be set to a distance, which is the set distance gap between the body and the chassis, so as to simulate a vehicle with the gap of the set distance by the sealing performance test tool 1. By testing the sealing performance of the sealing performance test tool 1, the sealing performance of the sealing interface between the body and the chassis of the vehicle can be evaluated.

[0191] In one possible design, as shown in Figure 12 The sealing performance test tool 1 includes a plurality of cushion block assemblies. One cushion block assembly includes at least one cushion block 30. The heights of the spacer parts 31 of the cushion blocks 30 in the same cushion block assembly are the same. The heights of the spacer parts 31 of the cushion blocks 30 in different cushion block assemblies are different. One of the cushion block assemblies is installed between the first face 11 and the second face 21.

[0192] In the design process of the vehicle, there is a set gap between the body and the chassis. In the production process of the vehicle, due to manufacturing and assembly errors, there is a gap between the body and the chassis, and the allowable error range of the gap is called the tolerance fluctuation range. Therefore, the gap between the body and the chassis is not a fixed value, but a value within the tolerance fluctuation range, and the gap of different vehicles may be different. Since the sealing performance test tool 1 includes a plurality of pad assemblies, the heights of the spacer portions 31 of the pads 30 in different pad assemblies are different, so that the height of the first gap 50 can be changed by installing pads 30 with different height spacer portions 31 in the sealing performance test tool 1, thereby performing sealing performance tests under different heights of the first gap 50 to simulate the sealing condition between the body and the chassis under different heights of the gap within the tolerance fluctuation range. That is, the sealing performance of the sealing member 2 under different compression states can be detected by simulating the state of the sealing member 2 under different heights of the first gap 50 through a plurality of pad assemblies.

[0193] In a specific embodiment, as shown in Figure 12 , the number of pads 30 shown in Figure 12 is eight, the heights of the spacer portions 31 of the eight pads 30 are the same, and the eight pads 30 belong to the same pad assembly.

[0194] In a possible design, the number of pad assemblies is three, which are a first pad assembly, a second pad assembly and a third pad assembly. The height of the spacer portion 31 in the first pad assembly is H1, the height of the spacer portion 31 in the second pad assembly is H2, the height of the spacer portion 31 in the third pad assembly is H3, the preset value of the height of the first gap 50 is L, the tolerance fluctuation range of the height dimension of the first gap 50 is ±S, and H1=L, H2=L-S, and H3=L+S.

[0195] In this configuration, the height of the shim portion 31 in the first shim assembly is equal to the design value of the gap between the vehicle body and the chassis. Therefore, the first gap 50 in the sealing performance testing fixture 1 with the first shim assembly is the design value (or nominal value), and this compression state of the seal 2 is called the positive pressure state. The height of the shim portion 31 in the second shim assembly is the smallest, and the first gap 50 in the sealing performance testing fixture 1 with the second shim assembly is at the minimum height within the allowable error range. Because the height of the first gap 50 is the smallest, the compression of the seal 2 within the first gap 50 is the largest, and the state when the seal 2 is in this state of maximum compression is called the overpressure state. The height of the shim portion 31 in the third shim assembly is the largest, and the first gap 50 in the sealing performance testing fixture 1 with the third shim assembly is at the maximum height within the allowable error range. Because the height of the first gap 50 is the largest, the compression of the seal 2 installed within the first gap 50 is the lowest, and the state when the seal 2 is in this state is called the underpressure state.

[0196] In this configuration, the sealing performance testing fixture 1 can simulate the sealing performance between the vehicle body and chassis when the first gap 50 is at its design value by installing the first pad assembly. The sealing performance testing fixture 1 can simulate the sealing performance between the vehicle body and chassis when the seal 2 is under-pressured by installing the second pad assembly. The sealing performance testing fixture 1 can simulate the sealing performance between the vehicle body and chassis when the seal 2 is under-pressured by installing the third pad assembly. Since the third pad assembly and the second pad assembly can respectively simulate the state when the first gap 50 is at the endpoint of the tolerance fluctuation range, if the seal 2 has good sealing performance in both over-pressured and under-pressured states, then the seal 2 can have good sealing performance within the tolerance fluctuation range.

[0197] In some possible designs, such as Figure 12 As shown, the pad assembly includes multiple pads 30, which are circumferentially spaced within the first gap 50. The multiple pads 30 can be block structures of different shapes. The opposite sides of each pad 30 are respectively shaped to mimic the first surface 11 and the second surface 21 corresponding to the mounting area of ​​that pad 30, so that the opposite sides of the pad 30 can have a larger contact area with the first surface 11 and the second surface 21, and a larger fitting area. For example, the opposite sides of the pad 30 installed in the flat area 51 are both flat surfaces 111, the opposite sides of the pad 30 installed in the first slope area 52 are both sloped surfaces, and the opposite sides of the pad 30 installed in the rounded corner area 55 are both curved surfaces 115.

[0198] In this arrangement, the plurality of spacers 30 arranged at intervals can save the total manufacturing cost of the spacers 30, and the plurality of spacers 30 arranged at intervals can support the first shell 10 and the second shell 20 in different regions, so as to stably connect the first shell 10 and the second shell 20.

[0199] In some other possible arrangements, one spacer assembly can also include one spacer 30, the spacer 30 has a ring structure, and opposite sides of the spacer 30 are respectively arranged in a shape of the first surface 11 and the second surface 21. The width of the spacer 30 is less than the width of the first surface 11 and the width of the second surface 21. The region between the first surface 11 and the second surface 21 without the spacer 30 is the first gap 50, and the spacer 30 is located in the peripheral region of the first gap 50.

[0200] In a possible design, as shown in Figure 13 , the spacer 30 includes a connecting portion 32 connected with the spacer portion 31, as shown in Figure 6 and Figure 7 , the first shell 10 is provided with a limiting groove 14, as shown in Figure 11 , the connecting portion 32 is at least partially located in the limiting groove 14.

[0201] In the spacer 30, the connecting portion 32 and the spacer portion 31 can be separately arranged and fixedly connected. The connecting portion 32 and the spacer portion 31 can be fixedly connected by any connection mode such as gluing, welding, and bolt connection. The connecting portion 32 and the spacer portion 31 can also be connected as an integral structure and manufactured by an integral molding process.

[0202] In the first shell 10, the number of the limiting grooves 14 can be one or more, for example, as shown in Figure 5 and Figure 6 , the number of the limiting grooves 14 is one, the limiting groove 14 is annular, and the limiting groove 14 is located in the peripheral region of the first gap 50. The spacer 30 can be provided with one or more. When the spacer 30 is provided with one, the connecting portion 32 of the spacer 30 extends into a part of the limiting groove 14. When the number of the spacers 30 is more than one, the plurality of spacers 30 respectively extend into different regions of the annular limiting groove 14. The limiting groove 14 can limit the spacer 30, on the one hand, to facilitate the installation of the spacer 30, and on the other hand, to reserve the space of the first gap 50.

[0203] In some possible embodiments, the spacer 30 can be installed on one of the first shell 10 or the second shell 20, and then the first shell 10 and the second shell 20 are connected to connect the spacer 30, the first shell 10 and the second shell 20.

[0204] AsFigure 12 and Figure 14 As shown in FIGS. 1 and 2, in one possible design, the first shell 10, the second shell 20 and the spacer 30 are connected by a locking structure 40. The locking structure 40 is used to connect the first shell 10, the second shell 20 and the spacer 30, and the locking structure 40 can be a clamping structure, a bolt structure, etc.

[0205] In this arrangement, the first shell 10, the second shell 20 and the spacer 30 are connected by the locking structure 40, so that no structure for connection needs to be installed on the first shell 10 or the second shell 20, and the structure of the first shell 10 and the second shell 20 is simplified.

[0206] As shown in FIGS. 1 and 2, in one possible design, the first shell 10 has a first flange 12, the second shell 20 has a second flange 22, the first face 11 is located on a side of the first flange 12 facing the second flange 22, and the second face 21 is located on a side of the second flange 22 facing the first flange 12. Figure 14 Figure 15 As shown in FIGS. 1 and 2, in one possible design, the first shell 10 has a first flange 12, the second shell 20 has a second flange 22, the first face 11 is located on a side of the first flange 12 facing the second flange 22, and the second face 21 is located on a side of the second flange 22 facing the first flange 12.

[0207] The first flange 12 is located at a peripheral edge region of the first shell 10 and extends away from the test cavity 60, the first flange 12 has a ring structure, and the first flange 12 is located at an end of the first shell 10 close to the second shell 20. The second flange 22 is located at a peripheral edge region of the second shell 20 and extends away from the test cavity 60, the second flange 22 has a ring structure, and the second flange 22 is located at an end of the second shell 20 close to the first shell 10.

[0208] In this arrangement, the first flange 12 and the second flange 22 do not need to form the test cavity 60, so that the height of the first flange 12 can be set to be smaller, and the height of the second flange 22 can be set to be smaller. The spacer 30 is arranged between the first flange 12 and the second flange 22, so that the first shell 10, the second shell 20 and the spacer 30 can be connected by connecting the first flange 12, the second flange 22 and the spacer 30. Since the total height of the first flange 12, the second flange 22 and the spacer 30 is relatively small, a relatively small locking structure 40 can be used to connect the first flange 12, the second flange 22 and the spacer 30, so that the connection of the locking structure 40 is facilitated.

[0209] ​When the locking structure 40 adopts the clamping structure, the clamping structure can be a C-shaped clamp (not shown in the figure), which has two clamping parts respectively located at the side of the first shell 10 away from the pad 30 and the side of the second shell 20 away from the pad 30, and clamps the first shell 10 and the second shell 20, and the pad 30 is located between the first shell 10 and the second shell 20, so that the first shell 10, the second shell 20 and the pad 30 can be clamped by the C-shaped clamp to be fixedly connected. When a plurality of pads 30 are arranged in the sealing performance test tool 1, a C-shaped clamp can be arranged corresponding to each pad 30.

[0210] When the locking structure 40 adopts the bolt structure, the bolt structure includes a bolt 41, and holes for the bolt 41 to pass through can be arranged on the first shell 10, the second shell 20 and the pad 30. A threaded hole can be arranged on the first shell 10 or the second shell 20, and the bolt 41 is connected by cooperating with the threaded hole. Alternatively, the bolt 41 structure can also include a nut 42, and the bolt 41 is locked with the nut 42 after passing through the holes on the first shell 10, the pad 30 and the second shell 20, so as to connect the first shell 10, the second shell 20 and the pad 30.

[0211] In some embodiments, as shown in Figure 15 The first flange 12 is provided with a first assembly hole 13, the pad 30 is provided with a second assembly hole 33, and the second flange 22 is provided with a third assembly hole 23. The first assembly hole 13, the second assembly hole 33 and the third assembly hole 23 are in communication with each other, and the locking structure 40 is sequentially arranged in the first assembly hole 13, the second assembly hole 33 and the third assembly hole 23.

[0212] The locking structure 40 can include a bolt 41 or a screw, and can further include a nut 42. In one possible arrangement, one of the first assembly hole 13 and the third assembly hole 23 is a threaded hole. For example, the first assembly hole 13 is a threaded hole, and the locking structure 40 includes the bolt 41. The head of the bolt 41 is located on the side of the third assembly hole 23 away from the first flange 12, the shank of the bolt 41 passes through the third assembly hole 23 and the second assembly hole 33 in sequence, and is screwed into the first assembly hole 13. The bolt 41 is locked in the first assembly hole 13, so that one end of the bolt 41 is connected with the first flange 12, and the other end is abutted on the second flange 22 through the head, so as to connect the second flange 22 and the first flange 12. Since the spacer 30 is located between the first flange 12 and the second flange 22, the first flange 12, the second flange 22 and the spacer 30 are connected through the cooperation of the bolt 41 and the threaded hole, that is, the first shell 10, the second shell 20 and the spacer 30 are connected. In another case, the first assembly hole 13, the second assembly hole 33 and the third assembly hole 23 are all light holes. When the locking structure 40 includes the bolt 41 and the nut 42, as shown in Figure 15 , one end of the bolt 41 can pass through the first assembly hole 13, the second assembly hole 33 and the third assembly hole 23 in sequence and extend out of and be locked with the nut 42. The head of the bolt 41 and the nut 42 clamp the first flange 12 and the second flange 22 from the outside of the first flange 12 and the second flange 22 respectively, so as to connect the first flange 12, the second flange 22 and the spacer 30. Alternatively, one end of the bolt 41 can pass through the third assembly hole 23, the second assembly hole 33 and the first assembly hole 13 in sequence and extend out of and be locked with the nut 42. The head of the bolt 41 and the nut 42 clamp the second flange 22 and the first flange 12 from the outside of the second flange 22 and the first flange 12 respectively, so as to connect the first flange 12, the second flange 22 and the spacer 30. When the locking structure 40 includes a screw and the nut 42, both ends of the screw are threaded, and two nuts 42 are provided correspondingly. The screw is arranged in the first assembly hole 13, the second assembly hole 33 and the third assembly hole 23, and both ends of the screw extend out of and are locked with the corresponding nuts 42 from the first assembly hole 13 and the third assembly hole 23 respectively. The two nuts 42 clamp the first flange 12 and the second flange 22 from the outside of the first flange 12 and the second flange 22 respectively, so as to connect the first flange 12, the second flange 22 and the spacer 30. In this arrangement, the locking structure 40 fixes and connects the first flange 12, the spacer 30 and the second flange 22 through the arrangement in the first assembly hole 13, the second assembly hole 33 and the third assembly hole 23, and the fixing method is simple and convenient.

[0213] In one possible design, as shown in Figure 13 , Figure 16 and Figure 17As shown, the first assembly hole 13 has a first opening 16, the second assembly hole 33 has a second opening 34, and the third assembly hole 23 has a third opening 24. The first opening 16 is located at a side edge region of the first flange 12 away from the test cavity 60. The second opening 34 and the third opening 24 are both in communication with the first opening 16, and the second opening 34 and the third opening 24 are both oriented in the same direction as the first opening 16.

[0214] The first assembly hole 13 penetrates the first shell 10 in the height direction of the sealing performance test tool 1. The first assembly hole 13 has a first opening 16 located at a side of the first assembly hole 13 away from the test cavity 60. The first opening 16 is configured to make the first assembly hole 13 a U-shaped hole. The first opening 16 is configured to make the side of the first assembly hole 13 in communication with the outside. The second assembly hole 33 penetrates the gasket 30 in the height direction of the sealing performance test tool 1. The second opening 34 is configured to make the second assembly hole 33 a U-shaped hole. The second opening 34 is configured to make the side of the second assembly hole 33 in communication with the outside. The third assembly hole 23 penetrates the second shell 20 in the height direction of the sealing performance test tool 1. The third opening 24 is configured to make the third assembly hole 23 a U-shaped hole. The third opening 24 is configured to make the side of the third assembly hole 23 in communication with the outside. The width of the first opening 16, the width of the second opening 34, and the width of the third opening 24 are all greater than or equal to the outer diameter of the region of the locking structure 40 used to extend into the first assembly hole 13, the second assembly hole 33, and the third assembly hole 23. For example, the width of the first opening 16, the width of the second opening 34, and the width of the third opening 24 are all greater than or equal to the outer diameter of the rod portion of the bolt 41. In this arrangement, the bolt 41 and the nut 42 do not need to be completely separated. The nut 42 can be screwed onto one end of the bolt 41, so that the distance between the nut 42 and the head of the bolt 41 is greater than the total height of the first flange 12, the second flange 22, and the gasket 30. The bolt 41 is pushed from the first opening 16, the second opening 34, and the third opening 24 toward the test cavity 60, so that the bolt 41 enters the first assembly hole 13, the second assembly hole 33, and the third assembly hole 23. Then the nut 42 is screwed, so that the distance between the nut 42 and the head of the bolt 41 is closer, to clamp the first flange 12, the second flange 22, and the gasket 30. During disassembly, the nut 42 is loosened, and the locking structure 40 can be removed from the first opening 16, the second opening 34, and the third opening 24 without completely separating the nut 42 from the bolt 41. In this arrangement, the locking structure 40 can be pushed into the first assembly hole 13, the second assembly hole 33, and the third assembly hole 23 from the first opening 16, the second opening 34, and the third opening 24, thereby achieving quick disassembly and installation of the locking structure 40.

[0215] In the process of using the sealing performance test tool 1 to perform the waterproof test, after the waterproof test, it is necessary to observe whether water enters the test cavity 60. In some possible embodiments, the test cavity 60 can be opened to manually observe whether water droplets are in the test cavity 60, and in other possible embodiments, the test patch can also be used to assist in determining whether water enters the test cavity 60.

[0216] In a possible design, the test cavity 60 is provided with a test patch that changes color when it comes into contact with water.

[0217] The test patch can be a test paper that changes color when it comes into contact with water, such as anhydrous copper sulfate test paper, anhydrous cobalt chloride test paper, etc. The anhydrous copper sulfate test paper is originally white and turns blue when it comes into contact with water, and the anhydrous cobalt chloride test paper is originally dark blue and turns pink when it comes into contact with water.

[0218] In this arrangement, since the test patch changes color when it comes into contact with water, it can be directly and quickly determined whether water enters the test cavity 60, thereby facilitating the evaluation of the waterproof performance.

[0219] The test patch can be attached to the inner wall of the test cavity 60. The test patch can be attached to the first housing 10 or the second housing 20. The test patch can be attached to the inner wall of the first housing 10 or the second housing 20, or a circle of test patches can be attached at a distance equal to the first gap 50.

[0220] In a possible design, the test cavity 60 is provided with test patches at a first distance from the first gap 50 and at a second distance from the first gap 50, and the first distance is less than the second distance.

[0221] In this arrangement, multiple test patches are arranged in the test cavity 60 from near to far from the first gap 50. This arrangement can be used to further analyze the amount of water that enters the test cavity 60. Since water is more likely to enter the test cavity 60 through the first gap 50, if the amount of water is small, the test patch at the first distance will change color, but the test patch at the second distance will not change color. If the amount of water is larger, the water will flow through the test patch at the first distance and then flow to the test patch at the second distance, so that both the test patch at the first distance and the test patch at the second distance will change color.

[0222] In this arrangement, the distance at which water enters the test cavity 60 can be conveniently determined by whether the test patch at the first distance changes color and whether the test patch at the second distance changes color.

[0223] During the waterproofing test using the sealing performance testing fixture 1, the fixture 1 needs to be placed at a certain depth underwater and maintained at that depth for a certain period of time. In some cases, the fixture 1 can be made relatively heavy, allowing it to sink to a predetermined underwater position. Alternatively, as... Figure 18 As shown, in one possible design, the sealing performance testing fixture 1 includes a counterweight structure 70, which is disposed within the test chamber 60. In this configuration, the addition of the counterweight structure 70 helps to maintain the sealing performance testing fixture 1 in a predetermined position underwater, and the counterweight structure 70 facilitates waterproof testing. Due to the separate design of the counterweight structure 70 from the first housing 10 and the second housing 20, the weight of the first housing 10 and the second housing 20 is relatively light, facilitating manufacturing, processing, and transportation. Furthermore, different weights of counterweight structures 70 can be placed within the test chamber 60 according to testing requirements, allowing the sealing performance testing fixture 1 to sink to different depths in the water to meet waterproof testing needs.

[0224] Sealing performance testing fixture 1 can also be used for airtightness testing, such as... Figure 19 As shown, in one possible design, at least one of the first housing 10 and the second housing 20 is provided with an injection port 25 and a sealing structure (not shown in the figure). The injection port 25 is connected to the test chamber 60, and the sealing structure is detachably connected to the injection port 25 and can be adapted to seal the injection port 25.

[0225] The sealing structure is detachably connected to the vent 25. Exemplarily, the sealing structure can be a plug made of a material with a certain elasticity, such as rubber or silicone. At least a portion of the plug extends into the vent 25 and is press-fitted to it. Alternatively, the sealing structure can be tape, which is adhered to the inner or outer side of the second housing 20, covering the vent 25 to seal it. In this configuration, the vent 25 can be used to inflate the test chamber 60, thereby testing the airtightness of the sealing interface between the vehicle body and the chassis. After covering the vent 25 with the sealing structure, the sealing performance testing fixture 1 can be used to test waterproof performance. That is, this sealing performance testing fixture 1 is convenient for both airtightness and waterproof testing, and has a wider range of applications. In one specific embodiment, such as... Figure 19 As shown, the second housing 20 is provided with an injection port 25 and a sealing structure, the sealing structure covering the injection port 25.

[0226] In one specific embodiment, the sealing performance test tool 1 comprises a first shell 10, a second shell 20, a cushion block 30 and a locking structure 40. The first shell 10 is used to simulate a chassis, and has a first flange 12 and a first recess structure 15. The first flange 12 is located at the periphery of the first recess structure 15, and has a first face 11. The edge of the first flange 12 is provided with a limiting groove 14 in the shape of a ring. The second shell 20 is used to simulate a vehicle body, and has a second flange 22 and a second recess structure 26. The second flange 22 is located at the periphery of the second recess structure 26, and has a second face 21. The first face 11 is opposite to the second face 21, and a first gap 50 is formed between the first face 11 and the second face 21. The first gap 50 is used to install a sealing element 2. The first recess structure 15 and the second recess structure 26 are in communication to form a test cavity 60. The first gap 50 surrounds the periphery of the test cavity 60. After the sealing element 2 is installed in the first gap 50, the sealing element 2 can block the first gap 50, so that the test cavity 60 becomes a sealed cavity. The second shell 20 can be provided with a gas injection hole 25, and the gas injection hole 25 is provided with a blocking structure. The first gap 50 comprises two flat areas 51 and two stepped areas 54. The two flat areas 51 are oppositely arranged, and the two stepped areas 54 are oppositely arranged. The two flat areas 51 and the two stepped areas 54 are alternately arranged in the horizontal projection circumferential direction. One of a first slope area 52 and a second slope area 53 is arranged between adjacent flat areas 51 and stepped areas 54. The two sides of each flat area 51 are respectively the first slope area 52 and the second slope area 53. The two sides of each stepped area 54 are respectively the first slope area 52 and the second slope area 53. The flat area 51 and the first slope area 52, the flat area 51 and the second slope area 53, the stepped area 54 and the first slope area 52, and the stepped area 54 and the second slope area 53 are connected through a rounded area 55. The first face 11 has two flat faces 111 and two stepped faces 114. The two flat faces 111 are oppositely arranged, and the two stepped faces 114 are oppositely arranged. The two flat faces 111 and the two stepped faces 114 are alternately arranged in the horizontal projection circumferential direction. One of a first slope face 112 and a second slope face 113 is arranged between adjacent flat faces 111 and stepped faces 114. The two sides of each flat face 111 are respectively the first slope face 112 and the second slope face 113. The two sides of each stepped face 114 are respectively the first slope face 112 and the second slope face 113. The flat face 111 and the first slope face 112, the flat face 111 and the second slope face 113, the stepped face 114 and the first slope face 112, and the stepped face 114 and the second slope face 113 are connected through an arc face 115.In the second face 21, a flat face 111 is arranged corresponding to the flat face 111 of the first face 11 and the step face 114, a first slope face 112 is arranged corresponding to the first slope face 112 of the first face 11, a second slope face 113 is arranged corresponding to the second slope face 113 of the first face 11, and an arc face 115 is arranged corresponding to the arc face 115 of the first face 11. The sealing performance test tool 1 comprises a plurality of pads 30, which are divided into three groups according to thickness, and each group of pads 30 is referred to as a pad assembly. The three pad assemblies are referred to as a first pad assembly, a second pad assembly, and a third pad assembly. The height of the spacer pad 31 in the first pad assembly is H1, the height of the spacer pad 31 in the second pad assembly is H2, and the height of the spacer pad 31 in the third pad assembly is H3. The first gap 50 has a preset value L, and the tolerance fluctuation range of the first gap 50 is ±S. Therefore, H1=L, H2=L-S, and H3=L+S. The pad 30 comprises an integral connecting portion 32 and a spacer pad 31. The spacer pad 31 is located in the first gap 50, and the connecting portion 32 extends into the limiting groove 14. The first flange 12 is provided with a first assembly hole 13, the pad 30 is provided with a second assembly hole 33, and the second flange 22 is provided with a third assembly hole 23. The first assembly hole 13, the second assembly hole 33, and the third assembly hole 23 are in communication with each other. The locking structure 40 comprises a bolt 41 and a nut 42. The bolt 41 is sequentially arranged in the first assembly hole 13, the second assembly hole 33, and the third assembly hole 23, and is locked and connected with the nut 42. The counterweight structure 70 can also be installed in the test cavity 60.

[0227] As shown in Figure 20 , the assembly process of the sealing performance test tool 1 and the sealing element 2 can be: preparing the first shell 10, installing the sealing element 2 on the first face 11 of the first shell 10, placing the pad 30 on the first shell 10, and extending the connecting portion 32 of the pad 30 into the limiting groove 14 of the first shell 10. The counterweight structure 70 is placed in the first shell 10, the second shell 20 is buckled onto the first shell 10, and the second shell 20, the first shell 10, and the pad 30 are connected through the locking structure 40.

[0228] As shown in Figure 21 , the application also provides a test device, which comprises a water tank 3 and the sealing performance test tool 1 provided by any of the embodiments. The water tank 3 is used to accommodate the sealing performance test tool 1.

[0229] The test device is used for waterproof test. The water tank 3 is a container for containing liquid. For example, the water tank 3 can be used to contain water 4. The sealing performance test tool 1 is used to simulate the vehicle body and chassis. The waterproof test of the sealing performance test tool 1 in the water tank 3 can simulate the waterproof test of the vehicle body and chassis, so as to realize the evaluation of the waterproof performance between the vehicle body and the chassis.

[0230] In a possible design, the water tank 3 is detachably connected with the sealing performance test tool 1.

[0231] Exemplarily, a lock chain is installed in the water tank 3, a clasp is installed in any one of the first shell 10 and the second shell 20, and the lock chain is connected with the clasp, so that the water tank 3 is connected with the sealing performance test tool 1. Alternatively, in another example, a clasp is installed in any one of the first shell 10 and the second shell 20, and a clamping groove is arranged on the side wall of the water tank 3, so that the clasp is clamped in the clamping groove, to connect the sealing performance test tool 1 with the water tank 3.

[0232] In this arrangement, the sealing performance test tool 1 is detachably connected with the water tank 3, so as to facilitate the sealing performance test tool 1 to be kept at a set position in the water tank 3, and facilitate the waterproof test to be performed.

[0233] As shown in Figure 20 , Figure 21 and Figure 22 , the embodiment of the present application further provides a test method, which adopts the sealing performance test tool 1 provided by any one of the technical solutions, and the method comprises tool installation and waterproof test, wherein:

[0234] The tool installation comprises: fixing the sealing element 2 to the first gap 50 of the sealing performance test tool 1, and blocking the test cavity 60 into a sealed cavity by the sealing element 2.

[0235] The waterproof test comprises: placing the sealing performance test tool 1 provided with the sealing element 2 in water, so that the sealing performance test tool 1 provided with the sealing element 2 is located at a first depth in the water; after a first set time, the sealing performance test tool 1 is taken out, and whether the test cavity 60 is waterlogged is detected.

[0236] In the process of tool installation, the sealing element 2 can be fixed on the first shell 10 or the second shell 20 by means of pasting or buckling connection, and then the first shell 10 and the second shell 20 are connected, so that the sealing element 2 is fixed in the first gap 50. When the sealing element 2 is a structure with certain elastic deformation characteristics such as a sealing strip, the sealing element 2 can be in a compressed state between the first face 11 and the second face 21, so that the sealing element 2 is blocked in the first gap 50, and the test cavity 60 is blocked into a sealed cavity by the sealing element 2.

[0237] Exemplarily, the sealing element 2 is pasted on the first shell 10, and then the second shell 20 is buckled on the first shell 10, so that the second shell 20 is connected with the first shell 10, and a test cavity 60 is formed between the second shell 20 and the first shell 10. The sealing element 2 is blocked in the first gap 50, so that the test cavity 60 becomes a sealed cavity.

[0238] The sealing performance test tool 1 installed with the sealing member 2 is placed in water at a first depth, at least so that the water covers the first gap 50, to test the waterproof performance of the sealing member 2. Exemplarily, the first depth is greater than the height of the sealing performance test tool 1 installed with the sealing member 2. In an implementable embodiment, the height of the sealing performance test tool 1 installed with the sealing member 2 is less than 1 meter, the first depth is greater than or equal to 1 meter, and the first set time is greater than or equal to 30 minutes. In a specific example, an IPX7 waterproof test can be performed, IPX being a waterproof level standard, IPX7 being level 7 in the waterproof level standard, being an immersion type, representing that under the specified conditions, even if immersed in water, water will not enter the interior. The IPX7 waterproof test requires that the sample be placed underwater at a depth of at least 1 meter for testing, the top of the sample being at least 0.15 meters from the water surface, and the test being maintained for 30 minutes. In the waterproof test provided in the embodiments of the present application, the sealing performance test tool 1 installed with the sealing member 2 can be placed underwater so that the first depth is greater than or equal to 1 meter, the distance between the top surface of the sealing performance test tool 1 installed with the sealing member 2 and the water surface is greater than or equal to 0.15 meters, and the first set time is greater than or equal to 30 minutes, to verify whether the sealing member 2 meets the IPX7 standard.

[0239] After the sealing performance test tool 1 is taken out of the water, the water on the surface of the sealing performance test tool 1 installed with the sealing member 2 can be wiped off first, especially the water stains on the first gap 50 and the outer surface of the sealing member 2 exposed at the first gap 50, to prevent water from flowing into the test cavity 60 after the first housing 10 and the second housing 20 are opened, from the first housing 10, the second housing 20, or the sealing member 2. After wiping off the water, the first housing 10 and the second housing 20 are separated to observe whether water has entered the test cavity 60.

[0240] To facilitate observation of whether water has entered the test cavity 60, a water-color-changing test patch can be provided on the inner wall of the test cavity 60 (which can be the inner wall of the first housing 10 or the second housing 20) during installation of the tool. Since the normal use state of the vehicle is that the chassis is below the vehicle body, when the sealing performance test tool 1 installed with the sealing member 2 is placed in water, the first housing 10 can be located below the second housing 20. Since water flows downward in the case of water ingress, the test patch can be attached to the inner wall of the first housing 10 and located below the first gap 50.

[0241] After the waterproof test is performed, whether water has entered the test cavity 60 is determined by observing whether the test patch has changed color. In the case that no water has entered the test cavity 60, the sealing member 2 meets the waterproof standard corresponding to the waterproof test, which means that the sealing member 2 between the vehicle body and the chassis simulated by the sealing performance test tool 1 meets the waterproof standard.

[0242] The test method simulates the state of the sealing member 2 installed between the vehicle body and the chassis by installing the sealing member 2 between the first shell 10 and the second shell 20 of the sealing performance test tool 1, i.e., simulates the state of the sealing member 2 installed between the vehicle body and the chassis, and can simulate the waterproof test on the vehicle body, the chassis and the sealing member 2 by performing the waterproof test on the sealing performance test tool 1 installed with the sealing member 2, so as to realize the waterproof performance evaluation of the sealing member 2 between the vehicle body and the chassis.

[0243] In some embodiments, as shown in FIG. 1, the tool installation further includes: Figure 20

[0244] The gasket 30 is installed between the first shell 10 and the second shell 20, and the gasket 30, the first shell 10 and the second shell 20 are connected.

[0245] The tool installation process can include: installing the sealing member 2 on the first shell 10, installing the gasket 30 on the first shell 10, buckling the second shell 20 on the first shell 10, and connecting the gasket 30, the first shell 10 and the second shell 20.

[0246] In the test method, the height of the first gap 50 between the first shell 10 and the second shell 20 can be changed by the gasket 30, so as to evaluate the waterproof performance of the sealing member 2 in a certain set compression state.

[0247] In order to enable the sealing performance test tool 1 installed with the sealing member 2 to sink to a set depth in the water 4, a counterweight structure 70 can be installed inside the sealing performance test tool 1 installed with the sealing member 2. The counterweight structure 70 can be placed in the first shell 10 before the second shell 20 is buckled on the first shell 10, and the counterweight structure 70 can be located in the test cavity 60 after the second shell 20 is buckled on the first shell 10.

[0248] In other embodiments, the sealing performance test tool 1 is installed with a snap ring, and a lock chain is installed in the water tank 3. After the sealing performance test tool 1 installed with the sealing member 2 is placed in the water tank 3, the lock chain is connected to the snap ring, so as to fix the sealing performance test tool 1 installed with the sealing member 2 in the water tank 3. In this way, the sealing performance test tool 1 installed with the sealing member 2 can be fixed at a set position in the water tank 3, so as to sink to a set depth in the water 4.

[0249] The sealing performance test tool 1 can be installed with both the counterweight structure 70 and the snap ring, or the sealing performance test tool 1 can be provided with one of the counterweight structure 70 and the snap ring.

[0250] ​In one possible design, waterproofing tests are conducted using a first pad assembly, a second pad assembly, and a third pad assembly, respectively. The height of the spacer portion 31 in the first pad assembly is H1, the height of the spacer portion 31 in the second pad assembly is H2, and the height of the spacer portion 31 in the third pad assembly is H3. The preset value of the first gap 50 is L, and the tolerance fluctuation range of the first gap 50 is ±S. Then, H1 = L, H2 = LS, and H3 = L + S. Waterproofing tests were conducted using a first, second, and third pad assembly. This means three sets of tests were performed to assess the sealing performance of a vehicle body and chassis. In the first set of tests, during tooling installation and waterproofing testing, the first pad assembly was installed in the sealing performance testing fixture 1. The height of the spacer portion 31 in the first pad assembly was equal to the design value of the gap between the vehicle body and chassis. Therefore, by conducting waterproofing tests using the sealing performance testing fixture 1 with the first pad assembly, the waterproofing performance of the sealing interface between the vehicle body and chassis under positive pressure could be determined. In the second set of tests, during tooling installation and waterproofing testing, the second pad assembly was installed in the sealing performance testing fixture 1. The first gap 50 in the sealing performance testing fixture 1 with the second pad assembly was within the minimum height allowed by error. Therefore, by conducting waterproofing tests using the sealing performance testing fixture 1 with the second pad assembly, the waterproofing performance of the sealing interface between the vehicle body and chassis under overpressure could be determined. During the tooling installation and waterproofing test in the third group of tests, a third pad assembly was installed in the sealing performance test fixture 1 during tooling installation. The first gap 50 in the sealing performance test fixture 1 with the third pad assembly was at the maximum height within the allowable error range. Therefore, by conducting the waterproofing test through the sealing performance test fixture 1 with the third pad assembly, it is possible to detect whether the waterproofing performance of the sealing interface between the vehicle body and the chassis meets the standard when the seal 2 is in a low-pressure state.

[0251] In this setup, three sets of tests are conducted by replacing different pad components to simulate different states of the seal 2 within the tolerance range, thereby enabling a more comprehensive evaluation of the waterproof performance of the seal 2.

[0252] like Figure 23 and Figure 24 As shown, in one possible design, after the tooling is installed and before the waterproofing test is conducted, the testing method also includes: conducting environmental testing.

[0253] The environmental test is to place the tooling in a certain set environment, thereby simulating the state of the vehicle body and chassis after being used in the set environment for a certain period of time. The environment can include one or more characteristics such as temperature, relative humidity, air quality, wind speed, etc. The set environment can be a high-temperature and high-humidity environment (simulating a summer environment), a low-temperature and low-humidity environment (simulating a winter environment), a high-salt and high-humidity environment (simulating a seaside area environment), an environment with more wind and sand, etc. After the environmental test, the waterproof test is performed, thereby simulating the state of the vehicle body and chassis after being used in the set environment for a certain period of time, and evaluating the sealing performance of the vehicle body and chassis after being used.

[0254] In a possible design, the environmental test includes a high-low temperature cycle test, and the high-low temperature cycle test includes:

[0255] The sealing performance test tooling 1 is placed in a plurality of different temperature environments for a set time respectively.

[0256] Since the vehicle will be used throughout the four seasons, the temperature usually differs throughout the four seasons, that is, the vehicle will experience a plurality of different temperatures during use. Placing the sealing performance test tooling 1 in a plurality of different temperature environments for a set time respectively can simulate the use state of the vehicle body and chassis and the seal 2 therebetween after being used in a plurality of different temperatures, thereby evaluating the waterproof performance of the vehicle after being used for a period of time through the subsequent waterproof test.

[0257] In a possible design, the high-low temperature cycle test includes a high-low temperature cycle, and the high-low temperature cycle includes:

[0258] The sealing performance test tooling installed with the seal 2 is placed in a high-temperature environment for a high-temperature residence time;

[0259] The sealing performance test tooling installed with the seal 2 is placed in a low-temperature environment for a low-temperature residence time;

[0260] The temperature of the high-temperature environment is greater than the temperature of the low-temperature environment.

[0261] There is a certain temperature difference between the temperature of the high-temperature environment and the temperature of the low-temperature environment, which can make the temperature difference relatively large, so as to increase the environmental difference between the high-temperature environment and the low-temperature environment. Exemplarily, the temperature of the high-temperature environment can be higher than 40℃, and the temperature of the low-temperature environment can be lower than -10℃, the high-temperature environment can be used as a simulation of the environment state with a relatively high temperature in summer, and the low-temperature environment can be used as a simulation of the environment state with a relatively low temperature in winter. Alternatively, the temperature of the high-temperature environment can be higher than 90℃, and the temperature of the low-temperature environment can be lower than -40℃. In this way, the high-temperature environment can be used as a simulation of the relatively highest temperature state that the highest temperature in the vehicle can reach, for example, a simulation of the highest environmental temperature simulation of the area where the battery is contained in the vehicle, and the low-temperature environment can be used as a simulation of the lowest temperature state of the lowest temperature in the vehicle in the winter extreme environment.

[0262] In this test method, the test tooling is placed in the high-temperature environment and the low-temperature environment for a certain time, so as to simulate the state of the seal after being in a relatively harsh environment for a period of time, so as to evaluate the waterproof performance of the seal after being used in a relatively harsh environment for a period of time.

[0263] In one possible design, the high-low temperature cycle test includes a high-low temperature cycle, and the high-low temperature cycle includes:

[0264] The sealing performance test tooling 1 installed with the seal 2 is placed in the first environment for a first set time;

[0265] The sealing performance test tooling 1 installed with the seal 2 is placed in the second environment for a second set time;

[0266] The sealing performance test tooling 1 installed with the seal 2 is placed in the third environment for a third set time;

[0267] The sealing performance test tooling 1 installed with the seal 2 is placed in the fourth environment for a fourth set time;

[0268] The temperature of the first environment, the temperature of the second environment, the temperature of the third environment and the temperature of the fourth environment are different.

[0269] During the test, the sealing performance test tool 1 is placed in four different environments for a set time, and the temperatures of the four environments are different, that is, the sealing performance test tool 1 is tested at least at four different temperatures. The four temperatures can be set according to the seasonal temperatures of the geographical location where the maximum user group of the vehicle or the vehicle market is located. For example, the temperature of the first environment is set to the average temperature of spring in a certain geographical location (for example, referred to as W city), the temperature of the second environment is set to the average temperature of summer in W city, the temperature of the third environment is set to the average temperature of autumn in W city, and the temperature of the fourth environment is set to the average temperature of winter in W city. Alternatively, other settings can also be used, for example, the temperature of the first environment is set to the normal temperature of W city (for example, the normal temperature can be the temperature that appears most frequently in W city in a year), the temperature of the second environment is set to the maximum temperature that the chassis and the vehicle body will experience during operation, the temperature of the third environment is set to the minimum temperature of W city, and the temperature of the fourth environment is set to the maximum temperature of W city.

[0270] In the above test method, the sealing performance test tool 1 is placed in four different temperature environments for a certain time before the waterproof test is performed. This can simulate the state of the seal 2 after use at different temperatures, and evaluate the waterproof performance of the seal 2 after use in four different temperature environments.

[0271] For example, in some embodiments, the temperature of the second environment is greater than that of the first environment, the temperature of the third environment is less than that of the first environment, and the temperature of the fourth environment is greater than that of the first environment and less than that of the second environment.

[0272] In this test method, the temperature of the first environment is greater than that of the third environment and less than that of the second environment and the fourth environment, so the first temperature can be set as a reference temperature; the temperature of the second environment is the highest, which can simulate the environment of the high-temperature area of the vehicle (such as the area where the battery is installed); the temperature of the third environment is low, which can be used to simulate winter environment; and the temperature of the fourth environment is relatively high, which can be used to simulate summer environment. In this way, by using four different environments, various different conditions that the vehicle may experience during use can be simulated, so that the waterproof test can be used to evaluate the waterproof performance of the seal 2 between the vehicle body and the chassis after the vehicle is used for a period of time.

[0273] In some embodiments, the temperature of the first environment is 20-28°C, the temperature of the second environment is 60-120°C, the temperature of the third environment is -50 to -10°C, and the temperature of the fourth environment is 45-55°C.

[0274] In the test method, the temperature of the first environment is normal temperature, the temperature of the second environment is high temperature, the temperature of the third environment is low temperature, and the temperature of the fourth environment is medium high temperature. The above-mentioned four different temperature ranges can simulate the temperature range that the vehicle may experience during use, increase the matching degree of the environmental test and the actual situation, and improve the evaluation simulation accuracy.

[0275] In a possible design, the temperature of the first environment is 23°C, the temperature of the second environment is 90°C, the temperature of the third environment is -40°C, and the temperature of the fourth environment is 50°C.

[0276] In the test method, the temperature of the first environment is normal temperature, so the first environment is used to simulate a normal temperature environment (for example, a spring environment or an autumn environment).

[0277] The temperature of the second environment is high temperature, and the second environment can be used to simulate the environment of a high heat area of the vehicle (for example, an area where a battery is installed). It should be noted that the temperature of the second environment can be higher than the maximum temperature of the high heat area of the vehicle, so that the vehicle corresponding to the sealing member 2 that passes the waterproof test can also have good waterproof performance in the high heat area.

[0278] The temperature of the third environment is low temperature, and can be used to simulate a winter environment. It should be noted that the temperature of the third environment can be lower than the minimum value of the winter temperature of the region where the user group of the vehicle or the market of the vehicle is located, so that the vehicle corresponding to the sealing member 2 that passes the waterproof test can also have good waterproof performance in the region even if the minimum temperature is encountered.

[0279] The temperature of the fourth environment is relatively high temperature, and can be used to simulate a summer environment. It should be noted that the temperature of the third environment can be higher than the maximum value of the summer temperature of the region where the user group of the vehicle or the market of the vehicle is located, so that the vehicle corresponding to the sealing member 2 that passes the waterproof test can also have good waterproof performance in the region even if the maximum summer temperature is encountered.

[0280] In a possible design, the high-low temperature cycle is performed multiple times in sequence. After the sealing performance test tool 1 provided with the sealing member 2 is kept in the fourth environment for the fourth set time, the high-low temperature cycle is recorded as being completed once, and the step of keeping the sealing performance test tool 1 provided with the sealing member 2 in the first environment for the first set time is continued, that is, the high-low temperature cycle enters the second time. By performing one round of high-low temperature cycle, the environmental change of the vehicle within a period of time (for example, within one year) can be simulated. By performing multiple high-low temperature cycles, the state of the sealing member 2 after relatively longer use can be simulated, so as to evaluate the waterproof performance of the sealing member 2 after relatively longer use.

[0281] Exemplarily, the high-low temperature cycle is sequentially performed at least ten times. Through the change of temperature and the extension of time in one high-low temperature cycle, the environmental change of the vehicle in one year can be simulated by one high-low temperature cycle, and the high-low temperature cycle is performed at least ten times, which can be used to simulate the environmental change of the vehicle driving for at least ten years (the vehicle driving more than 240,000 kilometers). After the multiple high-low temperature cycles are performed, the waterproof test is performed again, which can simulate the waterproof performance of the sealing interface between the vehicle body and the chassis after the vehicle is used for ten years or more, so as to evaluate the waterproof performance of the sealing element 2 after a long time of use.

[0282] In a possible design, after the sealing performance test tool 1 provided with the sealing element 2 is placed in the second environment for the second set time, and before the sealing performance test tool 1 provided with the sealing element 2 is placed in the third environment, the sealing performance test tool 1 provided with the sealing element 2 is switched from the third environment to the first environment. Since the temperature of the first environment is lower than that of the second environment, and the temperature of the third environment is lower than that of the first environment, the temperature difference between the second environment and the third environment is greater than the temperature difference between the second environment and the first environment, so that in the process of switching the second environment to the third environment, the second environment is switched to the first environment first, the first environment is used as a transition state, the temperature is prevented from dropping sharply, and the actual use state of the vehicle can be approached.

[0283] In the test method, the first environment is used as a reference environment, the sealing performance test tool 1 is switched from the second environment to the first environment after the simulation of the second environment, that is, the sealing performance test tool 1 provided with the sealing element 2 is restored to the reference environment, so as to facilitate the subsequent switching of the environment. In addition, the environmental change rule is more close to the environmental change rule in the actual use process of the vehicle, and is more close to the actual use of the vehicle.

[0284] In a possible design, after the sealing performance test tool 1 provided with the sealing element 2 is placed in the third environment for the third set time, and before the sealing performance test tool 1 provided with the sealing element 2 is placed in the fourth environment, the sealing performance test tool 1 provided with the sealing element 2 is switched from the third environment to the first environment.

[0285] Since the temperature of the first environment is lower than that of the fourth environment, and the temperature of the third environment is lower than that of the first environment, the temperature difference between the fourth environment and the third environment is greater than the temperature difference between the fourth environment and the first environment, so that in the process of switching the third environment to the fourth environment, the third environment is switched to the first environment first, the first environment is used as a transition state, the temperature is prevented from rising sharply, and the actual use state of the vehicle can be approached.

[0286] In the test method, the first environment is taken as a reference environment, after the simulation of the third environment, the sealing performance test tooling 1 is switched from the third environment to the first environment, that is, the sealing performance test tooling 1 installed with the sealing element 2 is restored to the reference environment, so as to facilitate the subsequent switching of the environment. In addition, the environment change rule is more close to the environment change rule in the actual use process of the vehicle, and is more close to the actual use of the vehicle.

[0287] In a possible design, after the sealing performance test tooling 1 installed with the sealing element 2 is placed in the fourth environment for the fourth set time, the sealing performance test tooling 1 installed with the sealing element 2 is switched from the fourth environment to the first environment.

[0288] After the test in the fourth environment, the sealing performance test tooling 1 installed with the sealing element 2 can be subjected to the next high-low temperature cycle or the subsequent waterproof test. Whether the next high-low temperature cycle or the subsequent waterproof test is performed, it is performed in the first environment. Therefore, after the test in the four environments, the sealing performance test tooling 1 installed with the sealing element 2 is switched to the first environment, so as to facilitate the subsequent cycle test or the subsequent waterproof test.

[0289] The environment can include not only temperature information but also relative humidity information. The relative humidity (RH) refers to the ratio of the actual water vapor pressure in the air to the saturated water vapor pressure at the time. It is usually expressed in percentage. The relative humidity of different environments can be the same or different. The relative humidity of the environment can be set according to the specific meaning of the different environment. For example, if the four environments are set to correspond to the four seasons, the relative humidity in the four environments can also be set according to the relative humidity in the four seasons in the same geographical location as the temperature setting.

[0290] In some embodiments, the relative humidity of the first environment, the relative humidity of the second environment and the relative humidity of the third environment are the same, and the relative humidity of the fourth environment is greater than the relative humidity of the first environment. When the above-mentioned embodiments are set for the fourth environment, the fourth environment simulates the summer state, and the relative humidity of the summer environment is usually higher than that of other seasons. Therefore, in this embodiment, the relative humidity of the fourth environment is greater than the relative humidity of the other environments.

[0291] In the test method, the environment is not only controlled from the temperature point of view, but also controlled from the relative humidity point of view, so that the actual environment change state of the sealing element 2 in use can be simulated more closely.

[0292] In some embodiments, the environmental test further comprises a high temperature and high humidity test, the high temperature and high humidity test comprising: placing the sealing performance test tool 1 installed with the sealing member 2 in a fifth environment for a fifth set time, the fifth environment having a temperature of 83-87℃ and a relative humidity of 83-87%.

[0293] The temperature of the fifth environment is in a range of 83-87℃, for example, 83℃, 84℃, 85℃, 86℃ or 87℃, which is in a high temperature range and higher than the natural environment temperature. The relative humidity of the fifth environment is in a range of 83-87%, for example, 83%, 84%, 85%, 86% or 83%, which is in a high humidity range and higher than the natural environment humidity. The high temperature and high humidity environment can accelerate the aging of materials, and thus the sealing member 1 can be tested in the high temperature and high humidity environment to evaluate the sealing performance of the sealing member 1 in the high temperature and high humidity environment.

[0294] In some embodiments, the temperature of the fifth environment is 85℃ and the relative humidity of the fifth environment is 85%. The test in the environment with a temperature of 85℃ and a relative humidity of 85% is also referred to as a high temperature and high humidity double 85 test. The high temperature and high humidity double 85 test can test the limit of the sealing member 2 in the sealing performance test tool 1 installed with the sealing member 2 in the high temperature and high humidity environment by aging test of the sealing performance test tool 1 in extreme conditions, and can evaluate the durability of the sealing member 2 in the sealing performance test tool 1 installed with the sealing member 2 in the high temperature and high humidity environment to simulate the durability of the vehicle body and chassis in extreme harsh conditions, and to evaluate whether the waterproof performance of the vehicle body and chassis after the extreme harsh conditions meets the standard through the subsequent waterproof test.

[0295] In the test method, the high temperature and high humidity test is performed on the sealing member 2 first, and then the waterproof test is performed, which can evaluate the waterproof performance of the sealing member 2 after the sealing member 2 is used in the extreme harsh environment.

[0296] In some embodiments, the fifth set time is equal to or greater than 480 hours.

[0297] In the test method, the high temperature and high humidity test is performed for a relatively longer time, which can evaluate the waterproof performance of the sealing member 2 after the sealing member 2 is used in the harsh environment for a long time.

[0298] In a possible design, the fifth set time is 720 hours. In the test method, the high temperature and high humidity test is performed for a longer time, which makes the environmental test more severe, so that the sealing member 1 that passes the evaluation has better durability, and the sealing performance between the vehicle body and the chassis can be maintained in a good state for a long time.

[0299] In some embodiments, after the installation of the tooling, and before the waterproof test, the method further comprises performing an environmental test, the environmental test comprising a salt spray test, the salt spray test comprising: placing the sealing performance test tooling 1 installed with the seal 2 in a sixth environment for a sixth set time, the sixth environment being an environment with neutral salt spray.

[0300] The salt spray test can be used to evaluate the corrosion resistance of the seal 2 in the sealing performance test tooling 1 installed with the seal 2 by creating an environment with a certain concentration of salt spray to simulate the corrosion conditions in a salt-containing environment. The waterproof test after the salt spray test can simulate the waterproof performance of the seal 2 after the chassis and the vehicle body are subjected to a certain time in a corrosive salt-containing environment through the sealing performance test tooling 1 installed with the seal 2. The neutral salt spray can be achieved by filling the test space with salt water containing about 5% sodium chloride and having a pH value of 6.5 to 7.2.

[0301] In this test method, the salt spray test is performed on the seal 2 first, and then the waterproof test is performed, which can detect and evaluate the waterproof performance of the seal 2 after being in a corrosive environment.

[0302] In a possible design, the sixth set time is equal to or greater than 480h. In this test method, the salt spray test is performed for a relatively longer time, which can evaluate the waterproof performance of the seal 2 after being used in a salt spray environment for a long time.

[0303] In a possible design, the sixth set time is 720h. In this test method, the longer time makes the salt spray environment more severe, so that the seal 1 that passes the evaluation has better durability.

[0304] In a possible design, after the installation of the tooling, and before the waterproof test, the method further comprises performing an environmental test, the environmental test comprising a high-low temperature cycle test, a high-temperature high-humidity test, and a salt spray test performed in sequence, or a high-temperature high-humidity test, a high-low temperature cycle test, and a salt spray test performed in sequence;

[0305] The high-low temperature cycle test comprises ten high-low temperature cycles, and each high-low temperature cycle comprises:

[0306] Placing the sealing performance test tooling installed with the seal in a first environment for a first set time;

[0307] Switching the sealing performance test tooling installed with the seal to a second environment and keeping it in the second environment for a second set time;

[0308] Switching the sealing performance test tooling installed with the seal to the first environment and keeping it in the first environment for a seventh preset time;

[0309] Switch the sealing performance test tooling with the sealing element installed to the third environment, and keep the sealing performance test tooling in the third environment for a third set time;

[0310] Switch the sealing performance test tooling with the sealing element installed to the first environment, and keep the sealing performance test tooling in the first environment for a seventh set time;

[0311] Switch the sealing performance test tooling with the sealing element installed to the fourth environment, and keep the sealing performance test tooling in the fourth environment for a fourth set time;

[0312] Switch the sealing performance test tooling with the sealing element installed to the first environment;

[0313] The high temperature and high humidity test comprises: placing the sealing performance test tooling with the sealing element installed in a fifth environment for a fifth set time, the temperature of the fifth environment being 85℃, and the relative humidity of the fifth environment being 85%;

[0314] The salt spray test comprises: placing the sealing performance test tooling with the sealing element installed in a sixth environment for a sixth set time, the sixth environment being an environment with neutral salt spray.

[0315] In the test method, the sealing performance test tooling 1 is first subjected to the high and low temperature cycle test, the high temperature and high humidity test, and the salt spray test, and then subjected to the waterproof test. The high and low temperature cycle test, the high temperature and high humidity test, and the salt spray test simulate the state of the sealing element 2 in different environmental conditions, including the state after being subjected to harsh environments, which is closer to the state of the sealing element 2 in actual use, so that a test result closer to actual application can be obtained, and the waterproof performance of the sealing element 2 when actually applied between the vehicle body and the chassis can be verified.

[0316] In a possible design, in the test method, a third gasket assembly is installed between the first shell 10 and the second shell 20 during installation of the tooling.

[0317] In the test method, since the third gasket assembly is installed in the sealing performance test tooling 1, the sealing element 2 is in an underpressure state. Compared with the positive pressure state and the overpressure state, the underpressure state is relatively more likely to have weaker waterproof performance, so if the sealing element 2 in the underpressure state also meets the waterproof standard, the sealing elements 2 in the positive pressure state and the overpressure state can also be inferred to be able to meet the same waterproof standard, so that there is no need to do another two sets of tests, the test process is simplified, and the test efficiency is improved.

[0318] In a possible design, the temperature of the first environment is 23℃, the relative humidity of the first environment is 50%, and the first set time is 1h;

[0319] The temperature of the second environment is 90℃, the relative humidity of the second environment is 50%, and the second setting time is 4h;

[0320] The temperature of the third environment is -40℃, the relative humidity of the third environment is 50%, and the third setting time is 4h;

[0321] The temperature of the fourth environment is 50℃, the relative humidity of the fourth environment is 95%, and the fourth setting time is 13h;

[0322] The temperature of the fifth environment is 85℃, the relative humidity of the fifth environment is 85%, and the fifth setting time is 720h;

[0323] The sixth setting time is 720h;

[0324] The seventh setting time is 1h.

[0325] In the test method, the first environment is a normal temperature environment, and the stability of the sealing member 1 in this environment is generally strong, so that the time (first setting time) of the tooling in the first environment is relatively short. The second environment, the third environment and the fourth environment are different relatively harsh environments, which are possible extreme environments, for example, the second environment is a high temperature environment, the third environment is a low temperature environment, and the fourth environment is a high humidity environment, which all test the waterproof performance of the sealing member 2 to a certain extent, so that the second setting time, the third setting time and the fourth setting time are all greater than the first setting time. The seventh setting time is in the process of switching between two environments with relatively large temperature difference, the tooling is first switched to the first environment, i.e. the reference environment, and the holding time of the tooling after switching to the reference environment is the seventh setting time. The seventh setting time is set to convert the tooling from a temperature change state to a temperature stable state, so as to continue to change the environmental temperature, thereby reducing the time of the tooling in the environment state of sudden temperature drop or rise, and more closely simulating the actual temperature change state.

[0326] As can be seen from the above, the test method simulates the environment state in which the vehicle is more likely to be in by performing environmental testing of the tooling in multiple environments with relatively large temperature differences, and more closely simulates the sealing member between the chassis and the vehicle body of the vehicle in the actual use state, thereby obtaining more realistic evaluation data.

[0327] In a specific embodiment of the present application, a third gasket assembly is installed between the first shell 10 and the second shell 20 during installation of the tooling; after installation of the tooling, and before the waterproof test, an environmental test is further performed, which includes high-low temperature cycle test, high temperature and high humidity test, and salt spray test performed in sequence, or high temperature and high humidity test, high-low temperature cycle test, and salt spray test performed in sequence;

[0328] The high-low temperature cycle test includes ten high-low temperature cycles, and each high-low temperature cycle includes:

[0329] The sealing performance test tool 1 installed with the sealing element 2 is placed in the first environment for a first set time, the first environment includes a temperature of the first environment and a relative humidity of the first environment, the temperature of the first environment is 23℃, the relative humidity of the first environment is 50%, and the first set time is 1h;

[0330] The sealing performance test tool 1 installed with the sealing element 2 is switched to the second environment for 1h, the second environment includes a temperature of the second environment and a relative humidity of the second environment, the temperature of the second environment is 90℃, and the relative humidity of the second environment is 50%;

[0331] The sealing performance test tool 1 installed with the sealing element 2 is placed in the second environment for a second set time, and the second set time is 4h;

[0332] The sealing performance test tool 1 installed with the sealing element 2 is switched to the first environment for 1h, and the sealing performance test tool 1 is kept in the first environment for 1h;

[0333] The sealing performance test tool 1 installed with the sealing element 2 is switched to the third environment for 1h, the third environment includes a temperature of the third environment and a relative humidity of the third environment, the temperature of the third environment is -40℃, and the relative humidity of the third environment is 50%;

[0334] The sealing performance test tool 1 installed with the sealing element 2 is placed in the third environment for a third set time, and the third set time is 4h;

[0335] The sealing performance test tool 1 installed with the sealing element 2 is switched to the first environment for 1h, and the sealing performance test tool 1 is kept in the first environment for 1h;

[0336] The sealing performance test tool 1 installed with the sealing element 2 is switched to the fourth environment for 1h, the fourth environment includes a temperature of the fourth environment and a relative humidity of the fourth environment, the temperature of the fourth environment is 50℃, and the relative humidity of the fourth environment is 95%;

[0337] The sealing performance test tool 1 installed with the sealing element 2 is placed in the fourth environment for a fourth set time, and the fourth set time is 13h;

[0338] The sealing performance test tool 1 installed with the sealing element 2 is switched to the first environment for 1h;

[0339] The high temperature and high humidity test comprises: placing the sealing performance test tooling 1 installed with the sealing element 2 in a fifth environment for a fifth set time, the fifth environment comprising a temperature of the fifth environment and a relative humidity of the fifth environment, the temperature of the fifth environment being 85℃, the relative humidity of the fifth environment being 85%, and the fifth set time being 720h;

[0340] The salt spray test comprises: placing the sealing performance test tooling 1 installed with the sealing element 2, which has completed the high and low temperature cycle test and the high temperature and high humidity test, in a sixth environment for a sixth set time, the sixth environment being an environment with neutral salt spray, and the sixth set time being 720h.

[0341] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A sealability test tool, characterized by, The application relates to a sealing performance test tool. The sealing performance test tool comprises a first shell, a second shell, and a first gap between the first shell and the second shell. The first gap has a flat area, and the first surface and the second surface opposite to the flat area are flat surfaces. The first gap has a first slope area, and the first surface and the second surface opposite to the first slope area are first slope surfaces.

2. The seal performance test fixture of claim 1, wherein, The first gap has a second slope area, and the first surface and the second surface opposite to the second slope area are second slope surfaces.

3. The seal performance test fixture of claim 2, wherein, The first gap has a step area, and at least one of the first surface and the second surface opposite to the step area is a step surface.

4. The seal performance test fixture of claim 3, wherein, The first gap has a rounded area, and the first surface and the second surface opposite to the rounded area are arc surfaces.

5. The seal performance test fixture of any one of claims 1 to 4, wherein, The sealing performance test tool further comprises a spacer, which is arranged between the first surface and the second surface and is located on a side of the first gap away from the test cavity, and is used for limiting the height of the first gap.

6. The seal performance test fixture of any one of claims 1 to 5, wherein, The sealing performance test tool comprises a plurality of spacer assemblies, one spacer assembly comprises at least one spacer, the spacers in the same spacer assembly have the same height, the spacers in different spacer assemblies have different heights, and one of the spacer assemblies is arranged between the first surface and the second surface.

7. The seal performance test fixture of any one of claims 1 to 6, wherein, The number of the spacer assemblies is three, namely a first spacer assembly, a second spacer assembly, and a third spacer assembly, the height of the spacer in the first spacer assembly is H1, the height of the spacer in the second spacer assembly is H2, the height of the spacer in the third spacer assembly is H3, the preset value of the height of the first gap is L, the tolerance fluctuation range of the height of the first gap is + / -S, and H1=L, H2=L-S, and H3=L+S.

8. The seal performance test fixture of claim 7, wherein, The spacer assembly comprises a plurality of spacers, and the spacers are arranged in the first gap in a circumferential direction.

9. The seal performance test fixture of claim 8, wherein, The spacer further comprises a connecting portion connected to the spacer portion, the first shell is provided with a limiting groove, and the connecting portion is at least partially arranged in the limiting groove.

10. The seal performance test fixture of claim 8, wherein, The first shell, the second shell, and the spacer are connected through a locking structure.

11. The seal performance test fixture of any one of claims 7 to 10, wherein, The first shell has a first flange, the second shell has a second flange, the first surface is located on a side of the first flange facing the second flange, and the second surface is located on a side of the second flange facing the first flange.

12. The seal performance test fixture of any one of claims 7 to 11, wherein, ​ 13. The seal performance test fixture of claim 12, wherein, ​ 14. The seal performance test fixture of claim 13, wherein, The first flange is provided with a first assembly hole, the spacer is provided with a second assembly hole, and the second flange is provided with a third assembly hole. The first assembly hole, the second assembly hole and the third assembly hole are in communication with each other, and the locking structure is sequentially arranged in the first assembly hole, the second assembly hole and the third assembly hole.

15. The seal performance test fixture of claim 14, wherein, The first assembly hole has a first opening, the second assembly hole has a second opening, and the third assembly hole has a third opening. The first opening is located at a side edge region of the first flange away from the test cavity. The second opening and the third opening are in communication with the first opening, and the second opening and the third opening are in the same direction as the first opening.

16. The seal performance test fixture of any one of claims 1 to 15, wherein, The test cavity is provided with a water color changing test patch.

17. The seal performance test fixture of claim 16, wherein, The test cavity is provided with the test patch at a first distance and a second distance from the first gap. The first distance is less than the second distance.

18. The seal performance test fixture of any one of claims 1 to 17, wherein, The sealing performance test tool includes a counterweight structure arranged in the test cavity.

19. The seal performance test fixture of any one of claims 1 to 18, wherein, At least one of the first shell and the second shell is provided with a gas injection hole and a plugging structure. The gas injection hole communicates with the test cavity, and the plugging structure is detachably connected to the gas injection hole and can adapt to plug the gas injection hole.

20. A test device, characterized by The water tank is used to accommodate the sealing performance test tool.

21. The test device of claim 20, wherein, The water tank is detachably connected with the sealing performance test tool.

22. A test method characterized by, The method uses the sealing performance test tool according to any one of claims 1-19, and the method includes tool installation and waterproof test, wherein, The tool installation includes fixing the sealing element to the first gap of the sealing performance test tool, and sealing the test cavity into a sealed cavity through the sealing element; The waterproof test includes placing the sealing performance test tool with the sealing element in water, so that the sealing performance test tool with the sealing element is located at a first depth in water; after a first set time, the sealing performance test tool with the sealing element is taken out, and whether water enters the test cavity is detected.

23. The test method of claim 22, wherein, The tool installation further includes: The spacer is arranged between the first shell and the second shell, and the spacer, the first shell and the second shell are connected.

24. The test method of claim 23, wherein, The first spacer assembly, the second spacer assembly and the third spacer assembly are respectively used to perform the waterproof test.

25. The test method of claim 22, wherein, After the tool installation and before the waterproof test, the method further includes performing an environmental test.

26. The test method of claim 25, wherein, The environmental test includes a high-low temperature cycle test, and the high-low temperature cycle test includes: The sealing performance test tool with the sealing element is placed in an environment with multiple different temperatures for a set time.

27. The test method of claim 26, wherein, The high-low temperature cycle test includes a high-low temperature cycle, and the high-low temperature cycle includes: The sealing performance test tool with the sealing element is placed in a high-temperature environment for a high-temperature residence time; The sealing performance test tool with the sealing element is placed in a low-temperature environment for a low-temperature residence time; The temperature of the high-temperature environment is higher than that of the low-temperature environment.

28. The test method of claim 26, wherein, The high-low temperature cycle test comprises high-low temperature cycles, and the high-low temperature cycles comprise: placing the sealing performance test tooling with the seal installed in a first environment for a first set time; placing the sealing performance test tooling with the seal installed in a second environment for a second set time; placing the sealing performance test tooling with the seal installed in a third environment for a third set time; placing the sealing performance test tooling with the seal installed in a fourth environment for a fourth set time; wherein the temperatures of the first, second, third and fourth environments are different.

29. The test method of claim 28, wherein, The high-low temperature cycles are sequentially performed multiple times.

30. The test method of claim 28, wherein, The temperature of the second environment is greater than that of the first environment, the temperature of the third environment is less than that of the first environment, and the temperature of the fourth environment is greater than that of the first environment and less than that of the second environment.

31. The test method of claim 30, wherein, The temperature of the first environment is 20-28°C, the temperature of the second environment is 60-120°C, the temperature of the third environment is -50- -10°C, and the temperature of the fourth environment is 45-55°C.

32. The test method of claim 31, wherein, The temperature of the first environment is 23°C, the temperature of the second environment is 90°C, the temperature of the third environment is -40°C, and the temperature of the fourth environment is 50°C.

33. The test method of claim 28, wherein, After the sealing performance test tooling with the seal installed is placed in the second environment for the second set time and before the sealing performance test tooling is placed in the third environment, the method further comprises switching the sealing performance test tooling with the seal installed from the third environment to the first environment.

34. The test method of claim 28, wherein, After the sealing performance test tooling with the seal installed is placed in the third environment for the third set time and before the sealing performance test tooling with the seal installed is placed in the fourth environment, the method further comprises switching the sealing performance test tooling with the seal installed from the third environment to the first environment.

35. The test method of claim 28, wherein, After the sealing performance test tooling with the seal installed is placed in the fourth environment for the fourth set time, the method further comprises switching the sealing performance test tooling with the seal installed from the fourth environment to the first environment.

36. A test method as claimed in any one of claims 28 to 35, characterised in that, The relative humidity of the first environment, the relative humidity of the second environment and the relative humidity of the third environment are the same, and the relative humidity of the fourth environment is greater than that of the first environment.

37. The test method of claim 22, wherein, After the tooling is installed and before the waterproof test is performed, the method further comprises performing an environmental test, and the environmental test comprises a high-temperature high-humidity test, and the high-temperature high-humidity test comprises: placing the sealing performance test tooling with the seal installed in a fifth environment for a fifth set time, wherein the temperature of the fifth environment is 83-87°C, and the relative humidity of the fifth environment is 83-87%.

38. The test method of claim 37, wherein, The temperature of the fifth environment is 85°C, and the relative humidity of the fifth environment is 85%.

39. The test method of claim 37, wherein, The fifth set time is equal to or greater than 480h.

40. The test method of claim 39, wherein, The fifth set time is 720h.

41. The test method of claim 22, wherein, After the installation of the tooling, and before the waterproof test is performed, an environmental test is also performed, the environmental test comprising a salt spray test, the salt spray test comprising: placing the sealing performance test tooling installed with the sealing member in a sixth environment for a sixth set time, the sixth environment being an environment with neutral salt spray.

42. The test method of claim 41, wherein, The sixth set time is equal to or greater than 480 h.

43. The test method of claim 42, wherein, The sixth set time is 720 h.

44. The test method of claim 22, wherein, After the installation of the tooling, and before the waterproof test is performed, the method further comprises performing an environmental test, the environmental test comprising a high-low temperature cycle test, a high temperature and high humidity test, and a salt spray test performed in sequence, or the high temperature and high humidity test, the high-low temperature cycle test, and the salt spray test performed in sequence; The high-low temperature cycle test comprises ten high-low temperature cycles, the high-low temperature cycle comprising: placing the sealing performance test tooling installed with the sealing member in a first environment for a first set time; switching the sealing performance test tooling installed with the sealing member to a second environment, and keeping in the second environment for a second set time; switching the sealing performance test tooling installed with the sealing member to the first environment, and keeping in the first environment for a seventh preset time; switching the sealing performance test tooling installed with the sealing member to a third environment, and keeping in the third environment for a third set time; switching the sealing performance test tooling installed with the sealing member to the first environment, and keeping in the first environment for a seventh set time; switching the sealing performance test tooling installed with the sealing member to a fourth environment, and keeping in the fourth environment for a fourth set time; switching the sealing performance test tooling installed with the sealing member to the first environment; The high temperature and high humidity test comprises: placing the sealing performance test tooling installed with the sealing member in a fifth environment for a fifth set time, the temperature of the fifth environment being 85°C, and the relative humidity of the fifth environment being 85%; The salt spray test comprises: placing the sealing performance test tooling installed with the sealing member in a sixth environment for a sixth set time, the sixth environment being an environment with neutral salt spray.

45. The test method of claim 44, wherein, During the installation of the tooling, a third gasket assembly is installed between the first shell and the second shell.

46. The test method of claim 44 or 45, wherein, The temperature of the first environment is 23°C, the relative humidity of the first environment is 50%, and the first set time is 1 h; The temperature of the second environment is 90°C, the relative humidity of the second environment is 50%, and the second set time is 4 h; The temperature of the third environment is -40°C, the relative humidity of the third environment is 50%, and the third set time is 4 h; The temperature of the fourth environment is 50°C, the relative humidity of the fourth environment is 95%, and the fourth set time is 13 h; The temperature of the fifth environment is 85°C, the relative humidity of the fifth environment is 85%, and the fifth set time is 720 h; The sixth set time is 720 h; The seventh set time is 1 h.

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