A durability test device for testing new energy vehicle parts

Abstract

The present invention discloses a durability test device for testing new energy vehicle parts, belonging to the technical field of vehicle part testing, including: a sealed box, an inclined flow part is provided on the inner bottom wall of the sealed box; a bearing clamping structure is installed inside the sealed box, a placement opening is provided on one side of the sealed box, an inner connection frame is movably connected to the side wall of the placement opening, a first elastic connection film is fixedly connected inside the inner connection frame, an outer connection frame is movably connected to the outside of the inner connection frame, and the scattered debris is centrally collected through the storage space, reducing the test error phenomenon that occurs during the subsequent test judgment of the parts after the debris scatters. At the same time, the sealing of the sealed box by the first elastic connection film and the second elastic connection film in the normal state can also reduce the situation where external dirt or other objects enter the inside of the sealed box, avoiding the situation where dirt or other objects enter the test environment and affect the test effect.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive part testing, and particularly to a durability testing device for testing new energy vehicle parts. Background Art

[0002] With the rapid development of the automotive industry, market competition has become increasingly fierce, and the quality requirements for automotive parts have also been continuously improved. As a key safety component in automotive chassis parts, the performance of wheel hub bearings is directly related to the safety and reliability of vehicles. Therefore, the durability testing of wheel hub bearings has become an essential and important link in the product development process.

[0003] The durability testing of wheel hub bearings aims to evaluate the performance of bearings under long-term use conditions, mainly including aspects such as raceway contact fatigue life, sealing performance, and resistance to fretting wear. During the testing process, it is necessary to simulate various working conditions that a vehicle may encounter during real-road driving, such as operating conditions under different loads, speeds, temperatures, etc.

[0004] In the patent with the patent name of a durability testing device for a wheel hub bearing and the publication number of CN117129214B, it is proposed that for the existing bearing durability testing device, it is necessary to keep the bearing rotating at a specific speed for a long time, the testing cycle is long, and as the temperature of the bearing increases, the accuracy of the bearing durability test will also be affected. Moreover, since the bearing needs to rotate at a high speed, debris often occurs inside the bearing and is thrown out at high speed along with the rotation of the bearing, which is relatively dangerous. When it is fixed by the bearing and the protective cover is buckled on the right side of the bearing, the front baffle is flipped so that the card slot of the front baffle is clamped on the handle on the front side of the protective cover, and then the flip plate is rotated and the plug block is slid to the left so that the left end of the plug block is inserted into the gap between the handle and the card slot to complete the fixation of the protective cover, so as to protect against the splashing of bearing debris through the protective cover, thereby improving the safety during the testing process. However, during the testing process, its testing environment is not a sealed testing environment. During the high-speed rotation of the bearing, debris will still splash in all directions through the unsealed positions. At the same time, it also proposes to collect the debris during the bearing testing process to judge the working conditions of the bearing. However, during the rotation of the bearing, the scattered debris will sputter in different directions, and it is also unable to collect and detect the debris well, so there will still be a large error during the testing and judgment process. Therefore, a durability testing device for testing new energy vehicle parts is proposed. Summary of the Invention

[0005] The purpose of the present invention is to provide a durability testing device for testing new energy vehicle parts to solve the problems raised in the above background art.

[0006] To achieve the above object, the present invention provides the following technical solution: A durability test device for testing new energy vehicle parts, comprising: a sealed box, an inclined flow portion is provided on the inner bottom wall of the sealed box; a bearing clamping structure is installed inside the sealed box, an opening for placement is provided on one side of the sealed box, an inner connection frame is movably connected to the side wall of the placement opening, a first elastic connection membrane is fixedly connected inside the inner connection frame, an outer connection frame is movably connected to the outside of the inner connection frame, a second elastic connection membrane is movably connected inside the outer connection frame, diversion holes are provided on the outside of the first elastic connection membrane and the second elastic connection membrane, the diversion holes are in a closed state under normal conditions, a storage space is formed between the first elastic connection membrane and the second elastic connection membrane, the distance between the first elastic connection membrane and the second elastic connection membrane is 1 - 1.4 cm, a test motor is fixedly connected to the side of the sealed box away from the outer connection frame, an output shaft of the test motor penetrates the outer wall of the sealed box and is fixedly connected to a test rod, a threaded section is integrally formed at one end of the test rod away from the test motor, and a bearing fixing and limiting structure is threadedly connected to the outside of the threaded section. An air inlet groove is provided inside the sealed box, a two-way fan is fixedly connected to the outside of the sealed box, the two-way fan is communicated with the air inlet groove, and air outlet holes are provided outside the air inlet groove.

[0007] Preferably, the bearing fixing and limiting structure includes an internal thread ring, the internal thread ring is threadedly connected to the threaded section of the test rod, a plurality of internal thread sleeves are rotatably connected to the outside of the internal thread ring, an external threaded rod is threadedly connected to the inside of the internal thread sleeve, a connecting plate is rotatably connected to one end of the external threaded rod away from the internal thread sleeve, and a positioning structure is movably connected to the outside of the test rod.

[0008] Preferably, the aperture diameters of the diversion holes on the outside of the first elastic connection membrane and the diversion holes on the outside of the second elastic connection membrane are different. The aperture diameter of the diversion holes on the outside of the first elastic connection membrane gradually decreases from bottom to top, the aperture diameter of the diversion holes on the outside of the second elastic connection membrane gradually increases from bottom to top, and the diversion hole at the bottommost part on the outside of the first elastic connection membrane is square and is flush with the outlet side of the inclined flow portion of the sealed box when the first elastic connection membrane extends.

[0009] Preferably, a disposable adhesion membrane is attached to the side of the second elastic connection membrane close to the first elastic connection membrane, and the side of the disposable adhesion membrane close to the square diversion hole of the first elastic connection membrane is an inclined upward arc surface.

[0010] Preferably, an inner cavity is integrally formed inside the first elastic connection membrane, and low-temperature paraffin is filled inside the inner cavity.

[0011] Preferably, the bearing clamping structure includes a driving motor fixedly connected to the outer side wall of the sealing box. The output shaft of the driving motor penetrates through the outer wall of the sealing box and is fixedly connected with a bidirectional lead screw. An extrusion block is threadedly connected to the outside of the bidirectional lead screw. One end of the bidirectional lead screw away from the driving motor is rotatably connected to one side of the inner side wall of the extrusion block. A clamping groove is formed on one side of the extrusion block away from the inner side wall of the sealing box. Two guide rods are fixedly connected to the inner side wall of the sealing box, and the extrusion block is slidably connected to the outside of the guide rods.

[0012] Preferably, a rotating bolt is fixedly connected to the outside of the internal thread sleeve.

[0013] Preferably, the positioning structure includes a support plate hinged to the inclined flow part of the sealing box. An outer sleeve is rotatably connected to the outer wall surface of the support plate. A rubber limiting sleeve is fixedly connected to the outside of the outer sleeve. A baffle is fixedly connected to the outside of the test rod.

[0014] Preferably, a triangular guide block is integrally formed on one side of the support plate close to the test rod.

[0015] Preferably, a fan is fixedly connected to the outside of the test rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] In the present invention, through the setting of the sealing box, the phenomenon of parts and debris flying everywhere can be reduced, further ensuring the safety of the test environment. At the same time, during the test process, the flying debris will be centrally collected into the storage space through the gas blown into the sealing box. The storage space centrally collects the flying debris, reducing the test error phenomenon that occurs during the subsequent test judgment of the parts after the debris flies everywhere. At the same time, the sealing of the sealing box by the first elastic connection membrane and the second elastic connection membrane in the normal state can also reduce the situation of external dirt or other items entering the sealing box, avoiding the situation that dirt or other objects enter the test environment and affect the test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is one of the three-dimensional structural schematic diagrams of the present invention;

[0019] Figure 2 is the exploded state structural schematic diagram of the present invention;

[0020] Figure 3 is the second three-dimensional structural schematic diagram of the present invention;

[0021] Figure 4 is the third three-dimensional structural schematic diagram of the present invention;

[0022] Figure 5 Schematic cross-sectional structure diagram in the present invention;

[0023] Figure 6 Schematic structure diagram of the separated state of the test rod and the outer sleeve in the present invention;

[0024] Figure 7 In the present invention Figure 5 Enlarged structure diagram of area A;

[0025] Figure 8 Schematic structure diagram of low-temperature paraffin and the first elastic connection film in the present invention.

[0026] In the figure: 100, sealing box; 101, test motor; 102, test rod; 103, internal thread ring; 104, internal thread sleeve; 105, external threaded rod; 106, rotary bolt; 107, connecting plate; 108, two-way fan; 109, air inlet groove; 110, one-way air outlet hole; 111, internal connection frame; 112, first elastic connection film; 113, external connection frame; 114, second elastic connection film; 115, shunt hole; 200, guide rod; 201, drive motor; 202, clamping groove; 203, extrusion block; 204, two-way lead screw; 300, disposable adhesion film; 400, low-temperature paraffin; 500, support plate; 501, outer sleeve; 502, rubber limit sleeve; 600, baffle; 700, triangular guide block; 800, fan. Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] Embodiment 1

[0029] Please refer to Figures 1 - 6 as shown, the present invention provides a technical solution:

[0030] A durability testing device for testing new energy vehicle parts, comprising: a sealed box 100, characterized in that an inclined flow portion is provided on the inner bottom wall of the sealed box 100; a bearing clamping structure is installed inside the sealed box 100, a placement opening is provided on one side of the sealed box 100, an inner connection frame 111 is movably connected to the side wall of the placement opening, a first elastic connection membrane 112 is fixedly connected to the inside of the inner connection frame 111, an outer connection frame 113 is movably connected to the outside of the inner connection frame 111, a second elastic connection membrane 114 is movably connected to the inside of the outer connection frame 113, a diversion hole 115 is provided on the outside of the first elastic connection membrane 112 and the second elastic connection membrane 114, the diversion hole 115 is in a closed state under normal conditions, and the first elastic connection A storage space is formed between the membrane 112 and the second elastic connecting membrane 114. The distance between the first elastic connecting membrane 112 and the second elastic connecting membrane 114 is 1-1.4 cm. The test motor 101 is fixedly connected to the side of the sealing box 100 away from the external connection frame 113. The output shaft of the test motor 101 passes through the outer wall of the sealing box 100 and is fixedly connected to the test rod 102. The end of the test rod 102 away from the test motor 101 is integrally formed with a threaded section, and the external thread of the threaded section is connected to a bearing fixed limiting structure. An air inlet groove 109 is provided inside the sealing box 100, and a two-way fan 108 is fixedly connected to the outside of the sealing box 100. The two-way fan 108 is communicated with the air inlet groove 109, and an air outlet 110 is provided on the outside of the air inlet groove 109.

[0031] Specifically, during use, the bearing is placed on the bearing fixing and limiting structure located outside the test rod 102, and after the inner ring of the bearing is fixed, the outer ring of the bearing is clamped and fixed by the bearing clamping structure, and the test motor 101 is started to drive the test rod 102 to rotate. During the continuous rotation, the load of the bearing is tested to see what effect the bearing will produce under the condition of continuous high-load rotation, and to test whether it meets the qualified standards. During the rotation process, if the bearing is unqualified, the bearing will have parts separation and splashing debris. However, the interior of the sealing box 100 is in a sealed state as a whole, and the debris will not be scattered in the sealed state, thereby effectively blocking the splashing of bearing parts and debris.

[0032] Furthermore, after the debris impacts the inner wall of the sealed box 100, it will fall due to gravity and thus be concentrated and collected on the inclined flow portion. Due to the inclined surface of the inclined flow portion itself, the debris falling on its surface will roll downward along its inclined surface. And during the testing process, by starting the two-way fan 108, gas is continuously delivered into the intake slot 109, and the intake slot 109 blows the gas delivered by the two-way fan 108 into the test cavity of the sealed box 100 through the externally opened air outlet holes 110 to dissipate heat from the bearing. And the continuously incoming air will blow the first elastic connection membrane 112 and the second elastic connection membrane 114, causing the first elastic connection membrane 112 and the second elastic connection membrane 114 to extend and expand outward. During the process of the first elastic connection membrane 112 and the second elastic connection membrane 114 extending and expanding, the diversion holes 115 outside the first elastic connection membrane 112 and the second elastic connection membrane 114 will unfold due to their expansion and extension. When the unfolding phenomenon occurs, the gas continuously entering the test cavity of the sealed box 100 can be discharged along with the opening of the diversion holes 115. And during the opening of the diversion holes 115, the debris splashed by the bearing will gradually impact the inner wall of the first elastic connection membrane 112 along with the gas entering the test inner cavity, without splashing in random directions. And when impacting the outside of the first elastic connection membrane 112, part of the debris will enter the storage space formed by the first elastic connection membrane 112 and the second elastic connection membrane 114 along with the diversion holes 115 opened outside the first elastic connection membrane 112. When the debris enters the storage space, because a large amount of air flow is blocked by the first elastic connection membrane 112, when the debris enters the storage space, the debris cannot be continuously supported by the blowing force of the wind and thus will fall in the storage space due to gravity and be collected through the storage space.

[0033] As Figures 1 - 5 shown, the bearing fixing and limiting structure includes an internal thread ring 103, the internal thread ring 103 is threadedly connected to the threaded section of the test rod 102, a plurality of internal thread sleeves 104 are rotatably connected to the outside of the internal thread ring 103, an external threaded rod 105 is threadedly connected to the inside of the internal thread sleeve 104, one end of the external threaded rod 105 away from the internal thread sleeve 104 is rotatably connected to a connecting plate 107, and a positioning structure is movably connected to the outside of the test rod 102.

[0034] Specifically, during use, the user sleeved the bearing outside the connecting plate 107. When sleeving the bearing outside multiple connecting plates 107, the user pressed the connecting plate 107 and rotated the internally threaded sleeve 104, so that the externally threaded rod 105 rotated inside the internally threaded sleeve 104. When the externally threaded rod 105 rotated inside the internally threaded sleeve 104, the externally threaded rod 105 would gradually move inside the internally threaded sleeve 104. During the movement of the internally threaded sleeve 104, it could gradually press against the connecting plate 107, so that the connecting plate 107 fit more closely to the side wall of the inner ring of the bearing, further fixing and limiting the bearing. After fixing the bearing outside the connecting plate 107, the internally threaded ring 103 was threadedly connected to the threaded section of the test rod 102 and was secondarily limited by the positioning structure.

[0035] As Figure 6 shown, the positioning structure includes a support plate 500, the support plate 500 is hinged to the inclined flow part of the sealed box 100, the outer wall surface of the support plate 500 is rotatably connected with an outer sleeve 501, a rubber limiting sleeve 502 is fixedly connected to the outside of the outer sleeve 501, and a baffle 600 is fixedly connected to the outside of the test rod 102.

[0036] Specifically, in the positioning structure, the further movement of the internally threaded ring 103 is blocked by the baffle 600. During the process of blocking the further movement of the internally threaded ring 103, the user can also adjust the support plate 500 and the outer sleeve 501 to the port position of the test rod 102, and sleeve the test rod 102 into the inside of the outer sleeve 501. At the same time, the rubber limiting sleeve 502 can also be abutted against the side of the internally threaded ring 103 away from the baffle 600, which can ensure the overall rotation stability of the test rod 102 while also ensuring further limiting and fixing of the internally threaded ring 103. When testing larger or smaller models of bearings, the position of the connecting plate 107 can be adjusted or the entire disposable adhesive film 300 with different sizes of connecting plates 107 and internally threaded sleeves 104 can be directly replaced.

[0037] Furthermore, a rotating bolt 106 is fixedly connected to the outside of the internally threaded sleeve 104. When continuously rotating the internally threaded sleeve 104, the internally threaded sleeve 104 can be further rotated by clamping the rotating bolt 106 with a wrench tool.

[0038] Furthermore, a triangular guiding block 700 is integrally formed on one side of the support plate 500 close to the test rod 102. Through the setting of the triangular guiding block 700, debris can be prevented from accumulating on the side wall of the support plate 500 during the process of the support plate 500 supporting the test rod 102.

[0039] Furthermore, a fan 800 is fixedly connected to the outside of the test rod 102. The fan 800 can assist the airflow in dissipating heat for the test bearing and blow the gas toward the test bearing.

[0040] like Figure 4 As shown, the bearing clamping structure includes a drive motor 201, which is fixedly connected to the outer wall of the sealing box 100. The output shaft of the drive motor 201 passes through the outer wall of the sealing box 100 and is fixedly connected to a bidirectional screw rod 204. The external thread of the bidirectional screw rod 204 is connected to an extrusion block 203. The end of the bidirectional screw rod 204 away from the drive motor 201 is rotatably connected to the side of the inner wall of the extrusion block 203. A clamping groove 202 is provided on the side of the extrusion block 203 away from the inner wall of the sealing box 100. The inner wall of the sealing box 100 is fixedly connected to two guide rods 200, and the extrusion block 203 is slidably connected to the outside of the guide rod 200.

[0041] Specifically, in the bearing clamping structure, the bidirectional screw 204 is driven to rotate by starting the driving motor 201. During the rotation, the bidirectional screw 204 drives the two extrusion blocks 203 to gradually approach each other. During the gradual approach, the two extrusion blocks 203 clamp the bearing through the external clamping groove 202, and the extrusion block 203 has the same width as the test motor 101, so that when the bearing generates splashing debris during the test rotation, it will directly hit the side walls of the two clamping grooves 202, reducing the impact force generated by the swinging splash acceleration.

[0042] The working steps of this solution are summarized and sorted out according to the above technical solution: Compared with the existing technology, in this embodiment, the setting of the sealing box 100 can reduce the phenomenon of parts and debris flying around, further ensuring the safety of the test environment. At the same time, during the test process, the scattered debris will be collected into the storage space by blowing the gas into the inside of the sealing box 100. The scattered debris is collected in a centralized manner through the storage space, reducing the test errors that occur in the subsequent test judgment process of the parts after the debris is scattered. At the same time, the sealing of the sealing box 100 by the first elastic connecting membrane 112 and the second elastic connecting membrane 114 under normal conditions can also reduce the entry of external dirt or other items into the interior of the sealing box 100, and avoid the situation where dirt or other objects enter the test environment and affect the test effect.

[0043] Example 2

[0044] Considering that during the use process, the diversion holes 115 formed outside the first elastic connection membrane 112 and the second elastic connection membrane 114 can disperse the gas entering the interior of the sealed box 100 to the outside. However, with the splashing of debris, some debris may still disperse to the outside of the sealed box 100 along the channels of the diversion holes 115. To address the above technical problems, the present application proposes the following technical solutions to solve the above technical problems, specifically as follows:

[0045] As Figures 2 - 5 shown, the aperture diameters of the diversion holes 115 outside the first elastic connection membrane 112 and the diversion holes 115 outside the second elastic connection membrane 114 are different. The aperture diameter of the diversion holes 115 outside the first elastic connection membrane 112 gradually decreases from bottom to top, and the aperture diameter of the diversion holes 115 outside the second elastic connection membrane 114 gradually increases from bottom to top. The diversion holes 115 at the bottommost part outside the first elastic connection membrane 112 are square and are flush with the outlet side of the inclined flow part of the sealed box 100 when the first elastic connection membrane 112 extends.

[0046] Specifically, during the use process, when the gas blows the debris onto the surfaces of the first elastic connection membrane 112 and the second elastic connection membrane 114, the first elastic connection membrane 112 and the second elastic connection membrane 114 expand and extend due to the blowing of the gas and gradually convey the debris into the storage space. The aperture diameter of the diversion holes 115 outside the first elastic connection membrane 112 gradually decreases from bottom to top, which enables the diversion holes 115 outside the first elastic connection membrane 112 to open the diversion holes 115 in the extended state of the first elastic connection membrane 112. The diversion holes 115 with a larger aperture at the bottom can convey the debris into the storage space more quickly. And when the second elastic connection membrane 114 expands and extends, the aperture diameter of the diversion holes 115 outside the second elastic connection membrane 114 gradually increases from bottom to top. The second elastic connection membrane 114 with a smaller aperture at the bottom will not allow the debris to flow out. At the same time, the diversion holes 115 outside the second elastic connection membrane 114 and the diversion holes 115 outside the first elastic connection membrane 112 are arranged in a staggered manner, and the number of the diversion holes 115 outside the second elastic connection membrane 114 is less than that of the diversion holes 115 outside the first elastic connection membrane 112.

[0047] Furthermore, the diversion holes 115 at the bottommost part outside the first elastic connection membrane 112 are square and are flush with the outlet side of the inclined flow part of the sealed box 100 when the first elastic connection membrane 112 extends, which can enable the debris falling on the inclined flow part to enter the storage space more quickly through the diversion holes 115 at the bottom of the first elastic connection membrane 112 along with the blowing of the air flow, increasing the effect of debris collection.

[0048] Summarize and sort out the working steps of this solution according to the above technical solution: Compared with the first embodiment, in this embodiment, the aperture of the external diversion holes 115 of the first elastic connection membrane 112 gradually decreases from bottom to top, and the aperture of the external diversion holes 115 of the second elastic connection membrane 114 gradually increases from bottom to top. During the process of collecting debris, the debris can be quickly collected through the diversion holes 115 outside the first elastic connection membrane 112, and when the second elastic connection membrane 114 forms a storage space, the gas inside the sealed box 100 can be further discharged through the diversion holes 115, avoiding the phenomenon that the debris is scattered through the diversion holes 115 when blown by the gas.

[0049] Embodiment III

[0050] Considering that during the use process, some debris will accumulate at the bottom of the storage space, and during the debris collection process, some debris will be stuck in the diversion holes 115 outside the first elastic connection membrane 112, resulting in incomplete debris collection. To solve the above technical problems, the present application proposes the following technical solution:

[0051] As Figures 5 - 7 shown, a disposable adhesion film 300 is attached to the side of the second elastic connection membrane 114 close to the first elastic connection membrane 112, and the side of the disposable adhesion film 300 close to the square diversion holes 115 of the first elastic connection membrane 112 is an inclined upward arc surface.

[0052] Specifically, during the use process, after the bearing test is completed, the staff can reverse-start the two-way fan 108. During the reverse-start process of the two-way fan 108, the first elastic connection membrane 112 and the second elastic connection membrane 114 that were originally expanded and extended outward will expand and extend inward. And during the process of expanding and extending inward, the second elastic connection membrane 114 will gradually fit the first elastic connection membrane 112, so that the disposable adhesion film 300 outside the second elastic connection membrane 114 fits the first elastic connection membrane 112, thereby adhering the debris stuck in the diversion holes 115 outside the first elastic connection membrane 112. After using the disposable adhesion film 300 to adhere the debris, separate the second elastic connection membrane 114 between the outer connection frame 113 and the inner connection frame 111, and after separation, tear off the disposable adhesion film 300 with the adhered debris from the second elastic connection membrane 114, so as to collect the debris centrally.

[0053] Further, on one side of the disposable adhesion film 300 close to the square diversion holes 115 of the first elastic connection film 112, there is an inclined upward arc surface. The arc surface at the bottom of the disposable adhesion film 300 can, when gas is blown into the storage space, push the debris accumulated at the bottom of the storage space along with the arc surface to the outer wall of the disposable adhesion film 300, and the disposable adhesion film 300 can adhesively adsorb the debris flowing upward with the air current, reducing the phenomenon of debris accumulation and scattered separation affected by the air current.

[0054] Summarize and sort out the working steps of this solution according to the above technical solution: Compared with the second embodiment, in this embodiment, through the setting of the disposable adhesion film 300, after the bearing test is completed, the two-way fan 108 can be reversely started to extract the gas inside the sealed box 100. After the gas inside the sealed box 100 is extracted, a reverse suction environment will appear inside the sealed box 100. When a negative pressure environment appears, the first elastic connection film 112 and the second elastic connection film 114 will gradually expand and extend inward in the reverse direction. When the first elastic connection film 112 and the second elastic connection film 114 gradually expand and extend inward in the reverse direction, the disposable adhesion film 300 can adhesively connect the debris stuck in the diversion holes 115 outside the first elastic connection film 112, reducing the phenomenon of debris being stuck in the diversion holes 115 outside the first elastic connection film 112.

[0055] Embodiment Four

[0056] Considering that during the use process, when the sealed box 100 is in the reverse suction process, the first elastic connection film 112 will expand and extend inward in the reverse direction inside the sealed box 100. When the first elastic connection film 112 expands and extends in the reverse direction and the sealed box 100 continues to be suctioned, the debris located inside the storage space will reversely pass through the diversion holes 115 outside the first elastic connection film 112 and thus re-enter the test inner cavity of the sealed box 100, resulting in the user being unable to comprehensively collect the debris at one time. To solve the above technical problems, the present application proposes the following technical solution, specifically:

[0057] As Figure 8 shown, an inner cavity is integrally formed inside the first elastic connection film 112, and low-temperature paraffin 400 is filled inside the inner cavity.

[0058] Specifically, during the use process, during the bearing test, heat is generated when the bearing rotates at high speed. When this heat blows towards the first elastic connection film 112 along with the air flow, the first elastic connection film 112 will transfer the heat to the low-temperature paraffin 400. After being heated, the low-temperature paraffin 400 will melt. The melted low-temperature paraffin 400 can no longer support the first elastic connection film 112. Therefore, when blowing out the air flow, the first elastic connection film 112 and the second elastic connection film 114 will extend and expand outwards together. After the test is completed, when the overall low-temperature paraffin 400 no longer continuously receives heat, the first elastic connection film 112 and the second elastic connection film 114 will return to their original states due to elasticity. After returning to the original state, the low-temperature paraffin 400 inside the first elastic connection film 112 will gradually harden because there is no continuous contact with heat. After gradually hardening, the staff reversely starts the two-way fan 108. When the two-way fan 108 is reversely started, the air inside the sealed box 100 will be pumped out. The hardened low-temperature paraffin 400 inside will support the first elastic connection film 112 to slightly deform inwards. In the case of slight deformation, the diversion holes 115 outside the first elastic connection film 112 will not fully open, but only slightly open to allow gas to enter. During the continuous entry of gas, the second elastic connection film 114 will gradually fit the hardened first elastic connection film 112, thereby adhesively collecting the debris clamped outside the first elastic connection film 112. Moreover, the elastic coefficient of the first elastic connection film 112 is less than that of the second elastic connection film 114. When slightly subjected to suction, the second elastic connection film 114 will deform inwards.

[0059] Summarize and sort out the working steps of this solution according to the above technical solution: Compared with Embodiment 3, in this embodiment, the first elastic connection film 112 with low-temperature paraffin 400 inside can not only form a storage space for storing debris with the second elastic connection film 114 during the bearing test, but also after the bearing test is completed, the low-temperature paraffin 400 inside the first elastic connection film 112 hardens. After hardening, in cooperation with the reversely suctioned two-way fan 108, the second elastic connection film 114 can drive the disposable adhesive film 300 to further fit the outer wall of the first elastic connection film 112, so as to adhesively collect the debris clamped by the storage space and the outer wall of the first elastic connection film 112 more closely. And it can also prevent the holes outside the first elastic connection film 112 from opening excessively during the reverse suction process by hardening the first elastic connection film 112 with the low-temperature paraffin 400, thereby reducing the phenomenon of debris being sucked out reversely.

[0060] Parts not involved in the present invention are the same as or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A durability test device for testing new energy vehicle parts, comprising: Sealed box (100), characterized in that an inclined flow portion is provided on the inner bottom wall of the sealed box (100); a bearing clamping structure is installed inside the sealed box (100), an access opening is provided on one side of the sealed box (100), an inner connection frame (111) is movably connected to the side wall of the access opening, a first elastic connection membrane (112) is fixedly connected inside the inner connection frame (111), an outer connection frame (113) is movably connected to the outside of the inner connection frame (111), a second elastic connection membrane (114) is movably connected inside the outer connection frame (113), diversion holes (115) are provided on the outside of the first elastic connection membrane (112) and the second elastic connection membrane (114), the diversion holes (115) are in a closed state under normal conditions, a storage space is formed between the first elastic connection membrane (112) and the second elastic connection membrane (114), the distance between the first elastic connection membrane (112) and the second elastic connection membrane (114) is 1 - 1.4 cm, a test motor (101) is fixedly connected to the side of the sealed box (100) away from the outer connection frame (113), the output shaft of the test motor (101) penetrates through the outer wall of the sealed box (100) and is fixedly connected to a test rod (102), a threaded section is integrally formed at the end of the test rod (102) away from the test motor (101), and a bearing fixing and limiting structure is threadedly connected to the outside of the threaded section. An air inlet groove (109) is provided inside the sealed box (100), a two-way fan (108) is fixedly connected to the outside of the sealed box (100), the two-way fan (108) is communicated with the air inlet groove (109), and air outlet holes (110) are provided outside the air inlet groove (109).

2. The durability test device for new energy vehicle parts testing according to claim 1, characterized in that: The bearing fixing and limiting structure includes an internal thread ring (103), the internal thread ring (103) is threadedly connected to the threaded section position of the test rod (102), a plurality of internal thread sleeves (104) are rotatably connected to the outside of the internal thread ring (103), an external threaded rod (105) is threadedly connected inside the internal thread sleeve (104), a connecting plate (107) is rotatably connected to the end of the external threaded rod (105) away from the internal thread sleeve (104), and a positioning structure is movably connected to the outside of the test rod (102).

3. The durability test device for new energy vehicle parts testing according to claim 1, characterized in that: The aperture diameters of the diversion holes (115) outside the first elastic connection membrane (112) and the diversion holes (115) outside the second elastic connection membrane (114) are different. The aperture diameter of the diversion holes (115) outside the first elastic connection membrane (112) gradually decreases from bottom to top, the aperture diameter of the diversion holes (115) outside the second elastic connection membrane (114) gradually increases from bottom to top, the diversion holes (115) at the bottommost part outside the first elastic connection membrane (112) are square and are flush with the outlet side of the inclined flow portion of the sealed box (100) when the first elastic connection membrane (112) extends.

4. The durability test device for new energy vehicle parts testing according to claim 1, characterized in that: A disposable adhesion film (300) is attached to the side of the second elastic connection film (114) close to the first elastic connection film (112). One side of the disposable adhesion film (300) close to the square diversion holes (115) of the first elastic connection film (112) is an arc surface inclined upward.

5. The durability test device for new energy vehicle parts testing according to claim 1, characterized in that: An inner cavity is integrally formed inside the first elastic connection film (112), and low-temperature paraffin (400) is filled inside the inner cavity.

6. The durability test device for new energy vehicle parts testing according to claim 1, characterized in that: The bearing clamping structure includes a driving motor (201). The driving motor (201) is fixedly connected to the outer side wall of the sealed box (100). The output shaft of the driving motor (201) penetrates through the outer wall of the sealed box (100) and is fixedly connected to a bidirectional lead screw (204). An extrusion block (203) is threadedly connected to the outside of the bidirectional lead screw (204). One end of the bidirectional lead screw (204) far from the driving motor (201) is rotatably connected to one side of the inner side wall of the extrusion block (203). A clamping groove (202) is formed on the side of the extrusion block (203) far from the inner side wall of the sealed box (100). Two guide rods (200) are fixedly connected to the inner side wall of the sealed box (100). The extrusion block (203) is slidably connected to the outside of the guide rod (200).

7. The durability test device for new energy vehicle parts testing according to claim 2, characterized in that: A rotary bolt (106) is fixedly connected to the outside of the internally threaded sleeve (104).

8. A durability test device for new energy vehicle parts testing according to claim 1, characterized in that: The positioning structure includes a support plate (500). The support plate (500) is hinged to the inclined flow part of the sealed box (100). An outer sleeve (501) is rotatably connected to the outer wall surface of the support plate (500). A rubber limiting sleeve (502) is fixedly connected to the outside of the outer sleeve (501). A baffle (600) is fixedly connected to the outside of the test rod (102).

9. The durability test device for new energy vehicle parts testing according to claim 8, characterized in that: A triangular guide block (700) is integrally formed on the side of the support plate (500) close to the test rod (102).

10. A durability test device for new energy vehicle parts testing according to claim 1, characterized in that: A fan (800) is fixedly connected to the outside of the test rod (102).

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