Obstacle assembly and device for scraping the bottom of a power battery

Abstract

The present application relates to the technical field of power battery bottom scraping test, and particularly relates to an obstacle assembly and a power battery bottom scraping test device. The obstacle assembly comprises an obstacle body, a support seat, a support shaft and a buffer structure. The support seat is provided with a clamping groove, the buffer structure is arranged in the clamping groove, the end of the support shaft is arranged in the clamping groove and is clamped between the support seat and the buffer structure, and the obstacle body is rotationally connected to the support shaft and used for impacting the power battery. The present application sets the buffer structure, so that for some scenes such as obstacles or road surfaces that are prone to deformation, the obstacle assembly is more consistent with the actual obstacles, the effectiveness of the obstacles is improved, and thus the accuracy and effectiveness of the related collision monitoring system are improved.

Description

Technical Field

[0001] This invention relates to the field of power battery bottom scratch testing technology, specifically to obstacle components and a power battery bottom scratch testing device. Background Technology

[0002] Vehicle batteries are typically located under the chassis, making them susceptible to impacts and scrapes from bumps, stones, and other road obstacles during driving. Therefore, batteries usually need to meet certain collision resistance requirements. To test the collision resistance performance of batteries, a scraping test device is used during vehicle production to perform a scraping test.

[0003] In existing technologies, the underbody scraping test device includes a support member and an obstacle movably connected to the support member. After the obstacle collides with the power battery, the obstacle slides relative to the power battery simultaneously along the length and width directions of the vehicle, and then tilts up after sliding a predetermined distance to impact the power battery. However, the effectiveness of the obstacle simulated by the existing underbody scraping test device is insufficient, and in some scenarios, the deviation from actual collision conditions is significant, thus affecting the accuracy of testing the collision avoidance performance of the power battery. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this application is to provide a scraping test device for obstacle components and power batteries, which aims to solve the technical problem of how to improve the effectiveness of obstacles.

[0005] In a first aspect, embodiments of this application provide an obstacle assembly, including an obstacle body, a support base, a support shaft, and a buffer structure. The support base is provided with a snap-fit ​​groove, the buffer structure is disposed in the snap-fit ​​groove, the end of the support shaft is disposed in the snap-fit ​​groove, and snapped between the support base and the buffer structure. The obstacle body is rotatably connected to the support shaft for impacting the power battery.

[0006] According to the above technical means, by setting a snap-fit ​​groove on the support base and placing the end of the support shaft in the snap-fit ​​groove, a stable connection between the support shaft and the support base can be achieved, and the obstacle body is rotatably connected to the support shaft. Therefore, this also realizes the connection between the obstacle body and the support base, which facilitates the support of the obstacle body through the support base.

[0007] Furthermore, the buffer structure is also set in the snap-fit ​​groove, so that the end of the support shaft snaps between the support seat and the buffer structure. In this way, when the scraping test device including this obstacle component is used to conduct a collision test on the power battery, after the obstacle body collides with the power battery, the pressure between the two can be transmitted to the buffer structure through the support shaft, and the buffer structure will produce adaptive deformation.

[0008] Therefore, by setting up a buffer structure, the obstacle components are made to better match the actual obstacles in scenarios containing easily deformable obstacles or road surfaces, thus improving the effectiveness of the obstacles and helping to improve the accuracy and effectiveness of the relevant collision monitoring system.

[0009] The obstacle body is rotatably connected to the support shaft to impact the power battery. In this way, during the collision and relative movement between the power battery and the obstacle body, the obstacle body can rotate around the support shaft, thereby continuously and repeatedly impacting the power battery. This further expands the simulation scenario of the scraping test device that includes this obstacle component and enhances the test capability of the scraping test device.

[0010] In some embodiments, the snap-fit ​​groove is recessed along the axial direction of the support shaft and extends through to the upper surface of the support base. The snap-fit ​​groove has a bottom wall surface and a first side wall surface and a second side wall surface arranged along a first direction. The first direction is perpendicular to the axial direction of the support shaft and parallel to the upper surface. The bottom wall surface is disposed opposite to the upper surface.

[0011] The buffer structure includes a first buffer and a second buffer. The first buffer is disposed on the first side wall, and the second buffer is disposed on the bottom wall. The end of the support shaft is engaged between the first buffer and the second side wall and is disposed on the upper side of the second buffer.

[0012] According to the above technical means, the end of the support shaft is set on the upper side of the second buffer. In this way, when the power battery collides with the obstacle body, the second buffer can undergo adaptive deformation along the end of the support shaft and the arrangement direction of the second buffer under the action of the support shaft, so that the obstacle component is more consistent with the obstacle in the actual collision scenario, thereby improving the effectiveness of the obstacle component.

[0013] For example, during a crash test, the first buffer is located between the second sidewall and the support shaft along the direction of movement of the power battery. By engaging the end of the support shaft between the first buffer and the second sidewall, when the power battery collides with the obstacle body, the support shaft will transfer the component force between them along the direction of movement of the power battery to the first buffer. The first buffer can undergo adaptive deformation, making the obstacle assembly more consistent with the obstacle in the actual collision scenario, thereby improving the effectiveness of the obstacle assembly.

[0014] It should be noted that in actual collisions between power batteries and obstacles, the impact force generated by the power battery on the obstacle is usually tilted downwards, thus generating forward (i.e., forward in the direction of vehicle travel) and downward components. Therefore, by setting up a first buffer and a second buffer, the two components of the impact force act on the first buffer and the second buffer respectively, thereby achieving better buffering and simulating collision scenarios with flexible obstacles and unpaved road surfaces, improving the effectiveness and accuracy of the simulation.

[0015] In some embodiments, the support base is further provided with a first limiting groove, which is recessed from the first side wall surface away from the second side wall surface.

[0016] The first buffer includes a first body portion and a first limiting portion connected to the first body portion. The first body portion is located in the snap-fit ​​groove and contacts the first side wall surface. The first limiting portion is disposed in the first limiting groove to cooperate with the first limiting groove for limiting.

[0017] According to the above technical means, by setting a first limiting groove on the support base, the first limiting part of the first buffer can be set in the first limiting groove, thus limiting the first buffer and preventing it from falling out of the locking groove during the test, thereby improving the reliability of the obstacle assembly.

[0018] In some embodiments, the dimension of the end of the first limiting groove near the second sidewall in the axial direction of the support shaft is smaller than the dimension of the end of the first limiting groove away from the second sidewall in the axial direction of the support shaft, and the shape of the first limiting portion matches the first limiting groove.

[0019] According to the above-mentioned technical means, after the first limiting part is assembled into the first limiting groove, the first limiting part cannot be dislodged from the first limiting groove along the concave direction of the first limiting groove, thus achieving the cooperative limiting of the first limiting groove and the first limiting part. Furthermore, by setting the shape of the first limiting part to match the first limiting groove, the cooperative limiting effect of the two can be improved.

[0020] In some embodiments, the support base is further provided with a second limiting groove, which is recessed from the second side wall surface away from the first side wall surface.

[0021] The second buffer includes a second body portion and a second limiting portion connected to the second body portion. The second body portion is located in the snap-fit ​​groove and contacts the bottom wall surface. The second limiting portion is disposed in the second limiting groove to cooperate with the second limiting groove for limiting.

[0022] According to the above technical means, by setting a second limiting groove on the support base, the second limiting part of the second buffer can be set in the second limiting groove, which can limit the second buffer and prevent the second buffer from falling out of the locking groove during the test, thereby improving the reliability of the obstacle assembly.

[0023] In some embodiments, the snap-fit ​​slot includes a first snap-fit ​​slot and a second snap-fit ​​slot, and the buffer structure includes a first buffer structure and a second buffer structure, wherein the first buffer structure is disposed in the first snap-fit ​​slot and the second buffer structure is disposed in the second snap-fit ​​slot.

[0024] The support base includes a connecting portion and a first support portion and a second support portion connected to the connecting portion. The first support portion and the second support portion are spaced apart along the axial direction of the support shaft. The first snap-fit ​​groove is provided in the first support portion, and the second snap-fit ​​groove is provided in the second support portion.

[0025] One end of the support shaft is located in the first snap-fit ​​groove and snaps between the first support part and the first buffer structure. The other end of the support shaft is located in the second snap-fit ​​groove and snaps between the second support part and the second buffer structure.

[0026] According to the aforementioned technical means, the first support part and the second support part are connected by a connecting part, which facilitates ensuring the relative position of the first support part and the second support part. Furthermore, since the first locking groove is located on the first support part and the second locking groove is located on the second support part, with one end of the support shaft located in the first locking groove and the other end in the second locking groove, this also helps to ensure the accuracy of the support shaft's position. Simultaneously, this provides support for the support shaft through two support points, thus providing a relatively stable and reliable support for the support shaft.

[0027] In some embodiments, the obstacle body includes a roller and an impactor, both of which are used to impact the power battery. The roller is rotatably connected to the support shaft, and the impactor is connected to the outer peripheral surface of the roller.

[0028] Based on the aforementioned technical means, this obstacle body can be used to simulate obstacles in scenarios such as obstacles with protrusions, where the protrusions repeatedly impact the power battery during the collision and relative movement between the obstacle and the battery. This expands the application scenarios of the obstacle component and helps improve the testing capabilities of the corresponding test equipment.

[0029] In some embodiments, the roller is provided with a third limiting groove, which is recessed radially from the outer circumferential surface of the roller, and a portion of the impact member is engaged within the third limiting groove.

[0030] Based on the above technical means, a detachable connection can be achieved between the roller and the impact component, which facilitates the assembly of the obstacle body and the replacement of the impact component, so as to allow for the use of impact components of different shapes to conduct lifting impact tests and improve the applicability of the test.

[0031] In some embodiments, the support shaft includes a shaft body and a pawl structure connected to the shaft body. The obstacle body includes a roller and a ratchet structure. The roller has a through hole, through which the support shaft passes. The ratchet structure is located on the inner circumferential surface of the roller and cooperates with the pawl structure to restrict the obstacle body from rotating in a first rotational direction, and to compress the buffer structure when the obstacle body rotates in the first rotational direction.

[0032] Based on the aforementioned technical means, by setting a ratchet structure and a pawl structure between the shaft body and the roller, the roller can only rotate in the first rotation direction relative to the support shaft. This allows the position of the roller relative to the support shaft to be preset before the collision test by using the ratchet and pawl structures to limit the movement, so that the impacting component is located in different positions relative to the support shaft. This facilitates the setting of the initial position of the impacting component, improves the convenience of the obstacle assembly, and makes it easier to study the influence of the initial position of the impacting component in the collision test.

[0033] Secondly, embodiments of this application provide a scraping test device for a power battery, including any of the aforementioned obstacle components. The obstacle component is slidably connected to the mounting base along a first direction, the first direction being perpendicular to the axial direction of the support shaft in the obstacle component.

[0034] Based on the aforementioned technical means, the obstacle component can impact the power battery during its journey, meaning that this scraping test device can be used to simulate the impact between the obstacle and the power battery during its journey.

[0035] In some embodiments, the scraping test apparatus further includes a support member slidably connected to the mounting base along the first direction. The support member has a plurality of mounting structures spaced apart along the first direction, and at least one of the mounting structures is on which the obstacle assembly is mounted.

[0036] According to the above technical means, by setting up a carrier and setting one or more obstacle components on the carrier, it is convenient to install the obstacle components in the bottom scraping test device. On the other hand, it is also possible to set up multiple obstacle components in the bottom scraping test device. In this way, the bottom scraping test device can carry out a follow-up impact test containing multiple obstacles, which expands the test scenario of the bottom scraping test device and improves its test capability.

[0037] In some embodiments, the mounting structure includes a fourth limiting groove recessed from the surface of the carrier facing away from the mounting base toward the mounting base and extending axially along the support shaft. The obstacle assembly is engaged within the fourth limiting groove and is axially along the support shaft. The mounting position of the obstacle assembly within the fourth limiting groove is adjustable.

[0038] According to the aforementioned technical means, the obstacle component is snapped into the fourth limiting groove to achieve connection between the obstacle component and the mounting structure, thus facilitating the installation and disassembly of both. Furthermore, the installation position of the obstacle component within the fourth limiting groove is adjustable. This allows for convenient adjustment of the obstacle component's position, enabling collision tests to be conducted on different locations of the power battery by adjusting the axial position of the obstacle component on the support shaft, thereby improving the comprehensiveness of the collision test.

[0039] In some embodiments, the mounting base is provided with a first guide groove extending along the first direction, the carrier includes a carrier plate and a first guide protrusion disposed on the carrier plate, the first guide protrusion is disposed in the first guide groove and can slide in the first guide groove, and the obstacle assembly is connected to the carrier plate.

[0040] According to the above technical means, by setting a first guide groove on the mounting base and a first guide protrusion on the bearing plate, and placing the first guide protrusion in the first guide groove, since the obstacle component is connected to the bearing plate, this can provide guidance for the movement of the obstacle component relative to the mounting base, prevent the obstacle component from moving along a non-preset path, and ensure the smooth progress of the collision test.

[0041] In some embodiments, the scraping test apparatus further includes a damping agent disposed in the first guide groove.

[0042] According to the above technical means, by setting a damping agent in the first guide groove, the resistance of the bearing plate relative to the mounting base when moving can be adjusted. In this way, by using damping agents with different damping effects, on the one hand, it can be used to simulate the frictional resistance between the obstacle and the road surface when the power battery collides, so as to improve the effectiveness of the scraping test device; on the other hand, it can also be used to study the influence of the frictional resistance between the bearing plate and the mounting base in the collision test.

[0043] In some embodiments, the carrier is provided with an overflow hole communicating with the first guide groove.

[0044] According to the above technical means, by setting an overflow hole connected to the first guide groove, the excessively accumulated damping agent can overflow outward along the overflow hole, thereby avoiding the above situation and causing the collision test to fail, thus improving the reliability of the bottom scraping test device.

[0045] In some embodiments, the first guide groove includes a first groove portion and a second groove portion, the first groove portion being located on the side of the second groove portion near the carrier and along the axial direction of the support shaft, the size of the first groove portion being larger than the size of the second groove portion, the first guide protrusion being disposed in the first groove portion, and the damping agent being disposed in the second groove portion and the first groove portion.

[0046] According to the above-mentioned technical means, by setting the first guide protrusion in the first groove, the connection between the carrier and the mounting base can be realized. A second groove is set on the side of the first groove away from the carrier, and damping agent is set in both the first and second grooves. This facilitates the provision of resistance to the relative movement between the carrier and the mounting base. On the other hand, since the first guide protrusion will squeeze the damping agent in the first groove to one end of the first groove when it moves, the damping agent in the second groove can be prevented from being squeezed to one end of the second groove. This allows the scraping test device to maintain the movement resistance between the carrier and the mounting base well after multiple tests, thereby improving the reliability of the scraping test device. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of this application or the background art, the accompanying drawings used in the embodiments of this application will be described below.

[0048] Figure 1 A schematic diagram of an obstacle assembly provided for some embodiments of this application; Figure 2 for Figure 1 Side view of the obstacle component shown; Figure 3 for Figure 1 Top view of the obstacle component shown; Figure 4 for Figure 1 Rear view of the obstacle component shown; Figure 5 for Figure 1 An exploded view of the obstacle assembly shown. Figure 6 The inclusion provided for some embodiments of this application Figure 1 A schematic diagram of the scraping test device for the power battery of the obstacle assembly shown. Figure 7 for Figure 6 A schematic diagram of the mounting base in the bottom scraping test device shown; Figure 8 for Figure 7 A magnified view of a portion of point A in the mounting base shown; Figure 9 for Figure 7 Side view of the mounting base shown; Figure 10 for Figure 6 A schematic diagram of the support component in the bottom scraping test device shown.

[0049] Explanation of reference numerals in the attached figures: 10-Scraping test device; 1-Obstacle assembly; 11-Obstacle body; 111-Roller; 1111-Third limiting groove; 112-Impact component; 12-Support base; 121-Snap-fit ​​groove; 1211-Bottom wall surface; 1212-First side wall surface; 1213-Second side wall surface; 1214-First snap-fit ​​groove; 1215-Second snap-fit ​​groove; 122-First limiting groove; 123-Second limiting groove; 124-Connecting part; 125-First support part; 126-Second support part; 13-Support shaft; 14-Buffer structure; 141-First buffer component; 1411-First body part; 1412-First limiting part; 142-Second buffer component; 1421-Second body part; 1422-Second limiting part; 143-First buffer structure; 144-Second buffer structure; 2-Mounting base; 21-First guide groove; 211-First groove portion; 212-Second groove portion; 3-Bearing component; 31-Mounting structure; 311-Fourth limiting groove; 32-Bearing plate; 33-First guide protrusion; 34-Overflow hole; F1-First direction. Detailed Implementation

[0050] The terms “first,” “second,” etc., are used for descriptive purposes only and have no sequential or technical meaning, nor should they be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0051] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the two parts can rotate relative to each other after connection. "Sliding connection" refers to a connection where the two parts can slide relative to each other after connection.

[0052] The terms "parallel" and "perpendicular" are relative to the current technological level, not absolute mathematical definitions. Slight deviations are permissible; approximations of parallelism or perpendicularity are acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, with the angle between them ranging from 0 to 5 degrees. Similarly, "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, with the angle between them ranging from 85 to 95 degrees.

[0053] The embodiments of this application will now be described with reference to the accompanying drawings.

[0054] See Figures 1 to 5 Some embodiments of this application provide an obstacle assembly 1 for a scraping test device 10 for a power battery. The obstacle assembly 1 includes an obstacle body 11, a support base 12, a support shaft 13, and a buffer structure 14. The support base 12 is provided with a snap-fit ​​groove 121, the buffer structure 14 is disposed in the snap-fit ​​groove 121, the end of the support shaft 13 is disposed in the snap-fit ​​groove 121, and snap-fitted between the support base 12 and the buffer structure 14. The obstacle body 11 is rotatably connected to the support shaft 13 for impacting the power battery.

[0055] For example, the obstacle component 1 described above can be used to simulate obstacles such as road bumps, stones, and plastic parts that collide with the power battery located on the vehicle chassis on the road surface. It is understood that the more similar the obstacle component 1 is to the actual obstacle, the higher the accuracy and effectiveness of the collision monitoring system for the power battery developed based on this obstacle component 1.

[0056] For example, when the obstacle is made of plastic or the road surface is unpaved, the road surface protrusions or the plastic obstacle have low hardness. During vehicle operation, when an obstacle on the road collides with the power battery in the vehicle chassis, due to the characteristics of the obstacle itself, the obstacle or road surface will undergo adaptive deformation, making the collision between the obstacle and the power battery a non-rigid collision.

[0057] By providing a snap-fit ​​groove 121 on the support base 12 and placing the end of the support shaft 13 in the snap-fit ​​groove 121, a stable connection between the support shaft 13 and the support base 12 can be achieved, and the obstacle body 11 is rotatably connected to the support shaft 13. Therefore, the connection between the obstacle body 11 and the support base 12 is also achieved, which facilitates the support of the obstacle body 11 by the support base 12.

[0058] Furthermore, the buffer structure 14 is also disposed in the snap-fit ​​groove 121, so that the end of the support shaft 13 is snapped between the support base 12 and the buffer structure 14. Thus, when the scraping test device 10 including this obstacle assembly 1 is used to conduct a collision test on the power battery, after the obstacle body 11 collides with the power battery, the pressure between the two can be transmitted to the buffer structure 14 through the support shaft 13, and the buffer structure 14 will undergo adaptive deformation.

[0059] Therefore, by setting the buffer structure 14, the obstacle component 1 is more consistent with the actual obstacle in some scenarios, such as those containing obstacles or road surfaces that are prone to deformation, thus improving the effectiveness of the obstacle and helping to improve the accuracy and effectiveness of the relevant collision monitoring system.

[0060] The obstacle body 11 is rotatably connected to the support shaft 13 for impacting the power battery. During the collision and relative movement between the power battery and the obstacle body 11, the obstacle body 11 can rotate around the support shaft 13, thereby continuously and repeatedly impacting the power battery. This further expands the simulation scenario of the scraping test device 10 including this obstacle component 1 and enhances the test capability of the scraping test device 10.

[0061] In some examples, the end of the support shaft 13 can be a square structure or a regular hexagonal structure, etc., which makes it easy to snap into the snap-fit ​​groove 121 and can prevent the support shaft 13 from rotating in the snap-fit ​​groove 121, thereby improving the stability of the support shaft 13.

[0062] In some embodiments, see Figure 1 and Figure 5 The snap-fit ​​groove 121 is recessed along the axial direction of the support shaft 13 and extends to the upper surface of the support base 12. Thus, when the support shaft 13 is snapped into the snap-fit ​​groove 121, it is only necessary to put the end of the support shaft 13 into the snap-fit ​​groove 121 from top to bottom, thereby facilitating the connection between the support shaft 13 and the support base 12.

[0063] The snap-fit ​​groove 121 has a bottom wall surface 1211 and a first side wall surface 1212 and a second side wall surface 1213 arranged along a first direction F1. The first direction F1 is perpendicular to the axial direction of the support shaft 13 and parallel to the upper surface. The bottom wall surface 1211 is arranged opposite to the upper surface.

[0064] The buffer structure 14 includes a first buffer 141 and a second buffer 142. The first buffer 141 is disposed on the first side wall 1212, and the second buffer 142 is disposed on the bottom wall 1211. The end of the support shaft 13 is engaged between the first buffer 141 and the second side wall 1213, and is disposed on the upper side of the second buffer 142.

[0065] For example, when a collision test is conducted using a test apparatus including this obstacle component 1, the test apparatus is set on the ground, and the power battery is set to pass over the obstacle component 1 in a first direction F1, during which the obstacle body 11 collides with the power battery.

[0066] Therefore, the end of the support shaft 13 is positioned on the upper side of the second buffer 142. When the power battery collides with the obstacle body 11, the second buffer 142 can undergo adaptive deformation along the end of the support shaft 13 and the arrangement direction of the second buffer 142 under the action of the support shaft 13, so that the obstacle assembly 1 is more consistent with the obstacle in the actual collision scenario, thereby improving the effectiveness of the obstacle assembly 1.

[0067] For example, during a collision test, the first buffer 141 is located between the second side wall 1213 and the support shaft 13 along the direction of movement of the power battery. By engaging the end of the support shaft 13 between the first buffer 141 and the second side wall 1213, when the power battery collides with the obstacle body 11, the support shaft 13 will transfer the component force between the two along the direction of movement of the power battery to the first buffer 141. The first buffer 141 can undergo adaptive deformation, making the obstacle assembly 1 more consistent with the obstacle in the actual collision scenario, thereby improving the effectiveness of the obstacle assembly 1.

[0068] It should be noted that in actual collisions between power batteries and obstacles, the collision force generated by the power battery is usually tilted downwards, thus generating forward (i.e., forward in the direction of vehicle travel) and downward components. Therefore, by setting the first buffer 141 and the second buffer 142, the two components of the collision force act on the first buffer 141 and the second buffer 142 respectively, thereby achieving better buffering and better simulating collision scenarios with flexible obstacles and unpaved road surfaces, improving the effectiveness and accuracy of the simulation.

[0069] In some examples, the materials of the first buffer 141 and the second buffer 142 may be rubber or silicone, etc., and this application does not make specific limitations on this.

[0070] In some other embodiments, only one of the first buffer 141 and the second buffer 142 may be provided. It is understood that when only the first buffer 141 is provided, it can be considered that only the deformation of the actual obstacle along the direction of movement of the power battery during a collision is considered in the obstacle assembly 1. When only the second buffer 142 is provided, it can be considered that only the deformation of the actual obstacle along the end of the support shaft 13 and the arrangement direction of the second buffer 142 (perpendicular to the road surface) is considered in the obstacle assembly 1. Thus, the obstacle assembly 1 can also be used to simulate obstacles in some scenarios.

[0071] In some embodiments, see Figure 1 and Figure 5 The support base 12 is also provided with a first limiting groove 122, which is recessed from the first side wall 1212 away from the second side wall 1213. The first buffer member 141 includes a first body part 1411 and a first limiting part 1412 connected to the first body part 1411. The first body part 1411 is located in the snap-fit ​​groove 121 and contacts the first side wall 1212. The first limiting part 1412 is provided in the first limiting groove 122 to cooperate with the first limiting groove 122 for limiting.

[0072] By providing a first limiting groove 122 on the support base 12, the first limiting part 1412 of the first buffer member 141 is placed in the first limiting groove 122, which can limit the first buffer member 141 and prevent the first buffer member 141 from falling out of the snap-fit ​​groove 121 during the test, thereby improving the reliability of the obstacle assembly 1.

[0073] In some examples, the first limiting groove 122 also extends through to the upper surface of the support base 12. In this way, the first limiting groove 122 can not only limit the first buffer member 141, but also allow the first limiting part 1412 of the first buffer member 141 to be installed from top to bottom into the first limiting groove 122, thereby facilitating the installation of the first buffer member 141 in the first limiting groove 122.

[0074] In some examples, the first body part 1411 can be a block structure, a plate structure, an arc structure, an irregular structure, etc.

[0075] In some embodiments, see Figure 1 and Figure 5 The dimension of the end of the first limiting groove 122 near the second side wall 1213 in the axial direction of the support shaft 13 is smaller than the dimension of the end of the first limiting groove 122 away from the second side wall 1213 in the axial direction of the support shaft 13. The shape of the first limiting part 1412 matches the shape of the first limiting groove 122. For example, the first limiting groove 122 can be a dovetail groove, a convex groove, etc., and the first limiting part 1412 can correspondingly be a dovetail structure, a convex structure, etc.

[0076] In this way, after the first limiting part 1412 is assembled into the first limiting groove 122, the first limiting part 1412 cannot be dislodged from the first limiting groove 122 along the concave direction of the first limiting groove 122, thus achieving the cooperative limiting of the first limiting groove 122 and the first limiting part 1412. Furthermore, by setting the shape of the first limiting part 1412 to match the first limiting groove 122, the cooperative limiting effect of the two can be improved.

[0077] In some other embodiments, the dimension of the end of the first limiting groove 122 near the second side wall 1213 along the axial direction of the support shaft 13 may also be greater than or equal to the dimension of the end of the first limiting groove 122 away from the second side wall 1213 along the axial direction of the support shaft 13. It is understood that after the end of the support shaft 13 is positioned between the first buffer 141 and the second side wall 1213, the support shaft 13 can press against the first body portion 1411, thereby pressing against the first limiting portion 1412, thus preventing the first limiting portion 1412 from disengaging from the first limiting groove 122 along the axial direction of the support shaft 13. This also prevents the first buffer 141 from falling out of the snap-fit ​​groove 121 during testing, thereby improving the reliability of the obstacle assembly 1.

[0078] In some embodiments, see Figure 1 and Figure 5 The support base 12 is also provided with a second limiting groove 123, which is recessed from the second side wall 1213 away from the first side wall 1212. The second buffer member 142 includes a second body part 1421 and a second limiting part 1422 connected to the second body part 1421. The second body part 1421 is located in the snap-fit ​​groove 121 and contacts the bottom wall 1211. The second limiting part 1422 is provided in the second limiting groove 123 to cooperate with the second limiting groove 123 for limiting.

[0079] By providing a second limiting groove 123 on the support base 12, the second limiting part 1422 of the second buffer member 142 is placed in the second limiting groove 123, which can limit the second buffer member 142 and prevent the second buffer member 142 from falling out of the snap-fit ​​groove 121 during the test, thereby improving the reliability of the obstacle assembly 1.

[0080] In some examples, the second limiting groove 123 also extends through to the upper surface of the support base 12. In this way, the second limiting groove 123 can not only limit the second buffer member 142, but also allow the second limiting part 1422 of the second buffer member 142 to be installed from top to bottom into the second limiting groove 123, thereby facilitating the installation of the second buffer member 142 in the second limiting groove 123.

[0081] In some examples, the shape of the second limiting groove 123 may be the same as the shape of the first limiting groove 122 in any of the above embodiments. In other examples, the shape of the second limiting groove 123 may also be different from the shape of the first limiting groove 122, for example, it may be a semi-circle, a rectangle, etc.

[0082] In some embodiments, see Figure 1 and Figure 5The snap-fit ​​slot 121 includes a first snap-fit ​​slot 1214 and a second snap-fit ​​slot 1215. The buffer structure 14 includes a first buffer structure 143 and a second buffer structure 144. The first buffer structure 143 is disposed in the first snap-fit ​​slot 1214, and the second buffer structure 144 is disposed in the second snap-fit ​​slot 1215.

[0083] The support base 12 includes a connecting portion 124 and a first support portion 125 and a second support portion 126 connected to the connecting portion 124. The first support portion 125 and the second support portion 126 are spaced apart along the axial direction of the support shaft 13. A first snap-fit ​​groove 1214 is provided in the first support portion 125 and a second snap-fit ​​groove 1215 is provided in the second support portion 126.

[0084] One end of the support shaft 13 is located in the first snap-fit ​​groove 1214 and snaps between the first support part 125 and the first buffer structure 143. The other end of the support shaft 13 is located in the second snap-fit ​​groove 1215 and snaps between the second support part 126 and the second buffer structure 144.

[0085] The first support portion 125 and the second support portion 126 are connected by the connecting portion 124, which facilitates ensuring the relative positions of the first support portion 125 and the second support portion 126. Since the first locking groove 1214 is located in the first support portion 125 and the second locking groove 1215 is located in the second support portion 126, with one end of the support shaft 13 located in the first locking groove 1214 and the other end in the second locking groove 1215, this also helps ensure the accuracy of the support shaft 13's position. Simultaneously, this provides support for the support shaft 13 through two support points, thus providing a relatively stable and reliable support.

[0086] The first buffer structure 143 and the second buffer structure 144 both include the first buffer 141 and the second buffer 142 described above. The arrangement of the first buffer 141 and the second buffer 142 in the first buffer structure 143 and the second buffer structure 144 can refer to the arrangement of the first buffer 141 and the second buffer 142 described above, and will not be elaborated here.

[0087] In some embodiments, see Figure 1 and Figure 5 The obstacle body 11 includes a roller 111 and an impactor 112, both of which are used to impact the power battery. The roller 111 is rotatably connected to the support shaft 13, and the impactor 112 is connected to the outer peripheral surface of the roller 111.

[0088] For example, when a collision test is conducted using a test apparatus including this obstacle component 1, the test apparatus is set on the ground, and the power battery is set to pass over the obstacle component 1 in a first direction F1, during which the obstacle body 11 collides with the power battery.

[0089] Specifically, the power battery first collides with the roller 111, bringing them into contact. Friction arises between them due to mutual compression. Therefore, as the power battery moves along the first direction F1, it drives the roller 111 to rotate. Since the impact member 112 is connected to the outer circumferential surface of the roller 111, it collides with the power battery after the roller 111 rotates a certain angle. Because the impact member 112 is located on the outer circumferential surface of the roller 111, the collision between the impact member 112 and the power battery is a tilting impact, recorded as one tilting impact. It can be understood that by adjusting the size of the roller 111 according to the size of the power battery along the first direction F1, the impact member 112 can perform multiple tilting impacts on the power battery during the process of the power battery passing over the obstacle assembly 1 once.

[0090] Thus, the obstacle body 11 can be used to simulate obstacles in scenarios such as obstacles with protrusions, where the protrusions repeatedly impact the power battery during the collision and relative movement between the obstacle and the power battery. This expands the application scenarios of the obstacle component 1 and helps improve the testing capabilities of the corresponding test device.

[0091] In some examples, the impactor 112 may be a block structure, a spherical structure, a plate structure, an irregular structure, etc., and this application does not make specific limitations on it.

[0092] In some embodiments, see Figure 1 and Figure 5 The roller 111 is provided with a third limiting groove 1111, which is recessed radially from the outer circumference of the roller 111. Part of the impact member 112 is engaged in the third limiting groove 1111. This allows for a detachable connection between the roller 111 and the impact member 112, facilitating the assembly of the obstacle body 11 and the replacement of the impact member 112. This also allows for the use of impact members 112 of different shapes to conduct lifting impact tests, improving the applicability of the test.

[0093] In some examples, the third limiting groove 1111 can be a dovetail groove or a convex groove, etc. The shape of the part of the impact member 112 connected to the third limiting groove 1111 matches the third limiting groove 1111, so that the impact member 112 can be better limited to prevent the impact member 112 from falling off the roller 111.

[0094] In some examples, the outer circumferential surface of the roller 111 includes an arcuate portion and a flat portion, with the flat portion connecting the two ends of the arcuate portion. A third limiting groove 1111 is provided on the flat portion, which facilitates the setting of the third limiting groove 1111 and the installation of the impact member 112. The distance between the surface of the impact member 112 away from the axis of the roller 111 and the axis of the roller 111 is greater than the radius of the arcuate portion of the roller 111, so as to facilitate the tilting impact test between the impact member 112 and the power battery.

[0095] In some other embodiments, the impact member 112 may also be connected to the roller 111 by means of bonding or welding. In this application, the impact member 112 and the roller 111 are connected by a snap-fit ​​connection for illustrative purposes.

[0096] In some embodiments, the support shaft 13 includes a shaft body and a pawl structure connected to the shaft body. The obstacle body 11 includes a roller 111 and a ratchet structure. The roller 111 has a through hole through which the support shaft 13 passes. The ratchet structure is located on the inner circumferential surface of the roller 111 and cooperates with the pawl structure to restrict the obstacle body 11 from rotating in a first rotation direction, and to compress the buffer structure 14 when the obstacle body 11 rotates in the first rotation direction. For example, along the first rotation direction, the first side wall 1212 is located in front of the second side wall 1213, so that when the roller 111 rotates in the first rotation direction, the force applied by the support shaft 13 acts on the first buffer member 141 and the second buffer member 142, so as to facilitate accurate testing.

[0097] By setting a ratchet structure and a pawl structure between the shaft body and the roller 111, the roller 111 can only rotate in the first rotation direction relative to the support shaft 13. This allows the position of the roller 111 relative to the support shaft 13 to be preset before the collision test by using the ratchet structure and the pawl structure to limit its movement. This ensures that the impact member 112 is in different positions relative to the support shaft 13, which facilitates the setting of the initial position of the impact member 112 and improves the convenience of the obstacle assembly 1. This also makes it easier to study the influence of the initial position of the impact member 112 in the collision test.

[0098] In some other embodiments, the support shaft 13 includes a shaft body and a bearing connected to the shaft body. The roller 111 has a through hole, and the outer peripheral surface of the bearing is engaged with the inner peripheral surface of the through hole to allow the roller 111 to be rotatably connected to the support shaft 13. In this case, grease is added to the bearing to increase the initial resistance to bearing rotation, which also facilitates setting the initial position of the impact member 112.

[0099] In some embodiments, see Figures 6 to 9This application also provides a scraping test device 10 for a power battery, including a mounting base 2 and the aforementioned obstacle assembly 1, wherein the obstacle assembly 1 is slidably connected to the mounting base 2 along a first direction F1.

[0100] As described above, during the collision test, the scraping test device 10 is set on the ground, and the power battery is positioned to pass over the obstacle assembly 1 along the first direction F1. Specifically, the power battery first collides with the roller 111, and the two come into contact. Then, friction exists between them due to mutual compression. This friction can drive the roller 111 to rotate and also drive the obstacle assembly 1 to move relative to the mounting base 2 along the first direction F1. In this way, the obstacle assembly 1 can impact the power battery while traveling alongside it. That is, the scraping test device 10 can be used to simulate the traveling impact between the obstacle and the power battery.

[0101] In some examples, the power battery to be tested is mounted on a trolley, and the trolley is moved toward the scraping test device 10 by a traction mechanism so that the power battery passes over the obstacle assembly 1.

[0102] In some examples, before conducting a crash test, the overlap between the impact surface of the roller 111 and the lowest point of the power battery can be pre-checked to ensure that the overlap meets the predetermined requirements. If it does not meet the requirements, the thickness of the second buffer 142 can be adjusted to match the predetermined overlap requirements. Alternatively, the overlap between the impact surface of the impact member 112 and the lowest point of the power battery can be pre-checked to ensure that the overlap meets the predetermined requirements. If it does not meet the requirements, the size of the impact member 112 itself can be adjusted to match the predetermined overlap requirements.

[0103] In some embodiments, see Figure 6 and Figure 10 The bottom scraping test device 10 also includes a support member 3, which is slidably connected to the mounting base 2 along the first direction F1. The support member 3 is provided with a plurality of mounting structures 31 spaced apart along the first direction F1, and at least one mounting structure 31 is equipped with an obstacle assembly 1.

[0104] By setting a carrier 3 and setting one or more obstacle components 1 on the carrier 3, it is convenient to install the obstacle components 1 in the scraping test device 10. On the other hand, it is also possible to set up multiple obstacle components 1 in the scraping test device 10. In this way, the scraping test device 10 can carry out a follow-up impact test containing multiple obstacles, which expands the test scenario of the scraping test device 10 and improves its test capability.

[0105] In some examples, the support member 3 can be a plate-like structure, a block-like structure, etc., and this application does not make specific limitations on it.

[0106] In some embodiments, see Figure 6 and Figure 10 The mounting structure 31 includes a fourth limiting groove 311. The fourth limiting groove 311 is recessed from the surface of the bearing member 3 facing away from the mounting base 2 toward the mounting base 2 and extends along the axial direction of the support shaft 13. The obstacle assembly 1 is engaged in the fourth limiting groove 311 and along the axial direction of the support shaft 13. The mounting position of the obstacle assembly 1 in the fourth limiting groove 311 is adjustable.

[0107] By engaging the obstacle component 1 within the fourth limiting groove 311, the obstacle component 1 and the mounting structure 31 are connected, facilitating their installation and disassembly. Furthermore, the mounting position of the obstacle component 1 within the fourth limiting groove 311 is adjustable. This allows for convenient adjustment of the obstacle component 1's position, enabling collision tests to be conducted on different locations of the power battery by adjusting the axial position of the obstacle component 1 on the support shaft 13, thereby improving the comprehensiveness of the collision tests.

[0108] In some examples, the shape of the fourth limiting groove 311 may be the same as the shape of the first limiting groove 122. In other examples, the shape of the fourth limiting groove 311 may be different from the shape of the first limiting groove 122. For example, the shape of the fourth limiting groove 311 may be rectangular or the like. The shape of the portion of the obstacle component 1 located within the fourth limiting groove 311 matches the shape of the fourth limiting groove 311.

[0109] In some other embodiments, the mounting structure 31 may include a connecting hole, and the support base 12 may be provided with a connecting post, which passes through the connecting hole, thus enabling the connection between the obstacle component 1 and the mounting structure 31.

[0110] In some embodiments, see Figure 6 and Figure 10 The mounting base 2 is provided with a first guide groove 21 extending along a first direction F1. The support member 3 includes a support plate 32 and a first guide protrusion 33 disposed on the support plate 32. The first guide protrusion 33 is disposed within the first guide groove 21 and can slide within the first guide groove 21. The obstacle assembly 1 is connected to the support plate 32. For example, the shape of the first guide protrusion 33 matches the shape of the first guide groove 21.

[0111] In some examples, a fourth limiting groove 311 is provided on the side of the support plate 32 opposite to the first guide protrusion 33 to form the above-mentioned mounting structure 31 on the support plate 32.

[0112] By setting a first guide groove 21 on the mounting base 2 and a first guide protrusion 33 on the support plate 32, and placing the first guide protrusion 33 in the first guide groove 21, since the obstacle component 1 is connected to the support plate 32, this can provide guidance for the movement of the obstacle component 1 relative to the mounting base 2, prevent the obstacle component 1 from moving along a non-preset path, and ensure the smooth progress of the collision test.

[0113] In some embodiments, the scraping test device 10 further includes a damping agent disposed within the first guide groove 21. By providing a damping agent within the first guide groove 21, the resistance magnitude of the support plate 32 during movement relative to the mounting base 2 can be adjusted. Thus, by using damping agents with different damping effects, on the one hand, it can be used to simulate the frictional resistance between the obstacle and the road surface when the power battery collides, thereby improving the effectiveness of the scraping test device 10; on the other hand, it can also be used to study the influence of the frictional resistance between the support plate 32 and the mounting base in collision tests.

[0114] In some examples, the damping agent may be lithium-based grease, polyurea-based grease, or calcium-based grease, etc., and this application does not specifically limit it.

[0115] In some embodiments, see Figure 6 and Figure 10 The carrier 3 is provided with an overflow hole 34 communicating with the first guide groove 21. During the movement of the carrier 3 relative to the mounting base 2, the damping agent in the first guide groove 21 may become excessively accumulated and block the movement of the carrier 3. By providing an overflow hole 34 communicating with the first guide groove 21, the excessively accumulated damping agent can overflow outward along the overflow hole 34, thereby avoiding the above situation and causing the collision test to fail, thus improving the reliability of the bottom scraping test device 10.

[0116] In some examples, overflow holes 34 are provided at both the first and second ends of the carrier 3 along the first direction F1, which can more effectively prevent the damping agent from blocking the movement of the carrier 3 due to excessive accumulation.

[0117] In some embodiments, see Figures 6 to 9 The first guide groove 21 includes a first groove portion 211 and a second groove portion 212. The first groove portion 211 is located on the side of the second groove portion 212 close to the support member 3 and along the axial direction of the support shaft 13. The size of the first groove portion 211 is larger than the size of the second groove portion 212. The first guide protrusion 33 is provided in the first groove portion 211, and the damping agent is provided in the second groove portion 212 and the first groove portion 211.

[0118] By setting the first guide protrusion 33 in the first groove 211, the connection between the carrier 3 and the mounting base 2 can be realized. A second groove 212 is set on the side of the first groove 211 away from the carrier 3, and damping agent is set in both the first groove 211 and the second groove 212. This facilitates the provision of resistance to the relative movement between the carrier 3 and the mounting base 2. On the other hand, since the first guide protrusion 33 will squeeze the damping agent in the first groove 211 to one end of the first groove 211 when it moves, the damping agent in the second groove 212 can be prevented from being squeezed to one end of the second groove 212. This allows the scraping test device 10 to maintain the movement resistance between the carrier 3 and the mounting base 2 well after multiple tests, thereby improving the reliability of the scraping test device 10.

[0119] In some examples, the first groove 211 can be a dovetail groove, a convex groove, etc., and the second groove 212 can be a rectangular groove, a triangular groove, or a semi-circular groove, etc.

[0120] In some examples, there may be multiple second grooves 212, such as two or three, and the multiple second grooves 212 are arranged along the axial direction of the support shaft 13. In this application, two second grooves 212 are used as an example for illustration.

[0121] In some examples, the mounting base 2 is also provided with a second guide groove extending along the first direction F1, and the carrier 3 is also provided with a second guide protrusion on the carrier plate 32. The second guide protrusion is disposed in the second guide groove and can slide in the second guide groove.

[0122] In some examples, there can be multiple first guide grooves 21 and second guide grooves, and the first guide grooves 21 and second guide grooves can be alternately arranged along the circumference of the support shaft 13. For example, there can be 2, 3, or 4, etc. In this application, the example is illustrated by having 3 first guide grooves 21 and 4 second guide grooves.

[0123] It should be understood that the application of this application is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims. Those skilled in the art can understand that implementing all or part of the processes of the above embodiments and making equivalent changes according to the claims of this application still fall within the scope of this application.

Claims

1. An obstacle component, characterized in that, The scraping test device (10) for power batteries includes an obstacle assembly (1) comprising an obstacle body (11), a support base (12), a support shaft (13), and a buffer structure (14). The support base (12) is provided with a snap-fit ​​groove (121). The buffer structure (14) is located in the snap-fit ​​groove (121). The end of the support shaft (13) is located in the snap-fit ​​groove (121) and snapped between the support base (12) and the buffer structure (14). The obstacle body (11) is rotatably connected to the support shaft (13) for impacting the power battery.

2. The obstacle assembly according to claim 1, characterized in that, The snap-fit ​​groove (121) is recessed along the axial direction of the support shaft (13) and extends through to the upper surface of the support base (12). The snap-fit ​​groove (121) has a bottom wall surface (1211) and a first side wall surface (1212) and a second side wall surface (1213) arranged along a first direction (F1). The first direction (F1) is perpendicular to the axial direction of the support shaft (13) and parallel to the upper surface. The bottom wall surface (1211) is disposed opposite to the upper surface. The buffer structure (14) includes a first buffer (141) and a second buffer (142). The first buffer (141) is disposed on the first side wall (1212), and the second buffer (142) is disposed on the bottom wall (1211). The end of the support shaft (13) is engaged between the first buffer (141) and the second side wall (1213) and is disposed on the upper side of the second buffer (142).

3. The obstacle assembly according to claim 2, characterized in that, The support base (12) is also provided with a first limiting groove (122), which is recessed from the first side wall (1212) away from the second side wall (1213); The first buffer (141) includes a first body part (1411) and a first limiting part (1412) connected to the first body part (1411). The first body part (1411) is located in the snap-fit ​​groove (121) and contacts the first side wall surface (1212). The first limiting part (1412) is provided in the first limiting groove (122) to cooperate with the first limiting groove (122) for limiting.

4. The obstacle assembly according to claim 3, characterized in that, The dimension of the end of the first limiting groove (122) near the second side wall (1213) in the axial direction of the support shaft (13) is smaller than the dimension of the end of the first limiting groove (122) away from the second side wall (1213) in the axial direction of the support shaft (13), and the shape of the first limiting part (1412) matches the first limiting groove (122).

5. The obstacle assembly according to claim 2, characterized in that, The support base (12) is also provided with a second limiting groove (123), which is recessed from the second side wall (1213) away from the first side wall (1212); The second buffer (142) includes a second body part (1421) and a second limiting part (1422) connected to the second body part (1421). The second body part (1421) is located in the snap-fit ​​groove (121) and contacts the bottom wall surface (1211). The second limiting part (1422) is provided in the second limiting groove (123) to cooperate with the second limiting groove (123) for limiting.

6. The obstacle assembly according to any one of claims 1-5, characterized in that, The card slot (121) includes a first card slot (1214) and a second card slot (1215), and the buffer structure (14) includes a first buffer structure (143) and a second buffer structure (144). The first buffer structure (143) is disposed in the first card slot (1214), and the second buffer structure (144) is disposed in the second card slot (1215). The support base (12) includes a connecting part (124) and a first support part (125) and a second support part (126) connected to the connecting part (124). The first support part (125) and the second support part (126) are spaced apart along the axial direction of the support shaft (13). The first snap-fit ​​groove (1214) is provided on the first support part (125), and the second snap-fit ​​groove (1215) is provided on the second support part (126). One end of the support shaft (13) is located in the first snap-fit ​​groove (1214) and snaps between the first support part (125) and the first buffer structure (143). The other end of the support shaft (13) is located in the second snap-fit ​​groove (1215) and snaps between the second support part (126) and the second buffer structure (144).

7. The obstacle assembly according to any one of claims 1-5, characterized in that, The obstacle body (11) includes a roller (111) and an impactor (112), both of which are used to impact the power battery; The roller (111) is rotatably connected to the support shaft (13), and the impact member (112) is connected to the outer peripheral surface of the roller (111).

8. The obstacle assembly according to claim 7, characterized in that, The roller (111) is provided with a third limiting groove (1111), which is recessed radially from the outer circumferential surface of the roller (111), and part of the impact member (112) is engaged in the third limiting groove (1111).

9. The obstacle assembly according to any one of claims 1-5, characterized in that, The support shaft (13) includes a shaft body and a pawl structure connected to the shaft body; The obstacle body (11) includes a roller (111) and a ratchet structure. The roller (111) has a through hole, and the support shaft (13) passes through the through hole. The ratchet structure is located on the inner circumferential surface of the roller (111) and cooperates with the pawl structure to restrict the obstacle body (11) from rotating in the first rotation direction, and can squeeze the buffer structure (14) when the obstacle body (11) rotates in the first rotation direction.

10. A scraping test device for a power battery, characterized in that, Includes a mounting base (2) and an obstacle assembly (1) according to any one of claims 1-9, the obstacle assembly (1) being slidably connected to the mounting base (2) along a first direction (F1) perpendicular to the axial direction of the support shaft (13) in the obstacle assembly (1).

11. The scraping test apparatus according to claim 10, characterized in that, It also includes a support member (3), which is slidably connected to the mounting base (2) along the first direction (F1); The carrier (3) is provided with a plurality of mounting structures (31) spaced apart along a first direction (F1), and at least one of the mounting structures (31) is equipped with the obstacle assembly (1).

12. The scraping test apparatus according to claim 11, characterized in that, The mounting structure (31) includes a fourth limiting groove (311), which is recessed from the surface of the bearing member (3) facing away from the mounting base (2) toward the mounting base (2) and extends along the axial direction of the support shaft (13). The obstacle assembly (1) is engaged in the fourth limiting groove (311) and extends along the axial direction of the support shaft (13). The mounting position of the obstacle assembly (1) in the fourth limiting groove (311) is adjustable.

13. The scraping test apparatus according to claim 11, characterized in that, The mounting base (2) is provided with a first guide groove (21) extending along the first direction (F1). The carrier (3) includes a carrier plate (32) and a first guide protrusion (33) provided on the carrier plate (32). The first guide protrusion (33) is provided in the first guide groove (21) and can slide in the first guide groove (21). The obstacle assembly (1) is connected to the carrier plate (32).

14. The scraping test apparatus according to claim 13, characterized in that, It also includes a damping agent, which is disposed in the first guide groove (21).

15. The scraping test apparatus according to claim 14, characterized in that, The support member (3) is provided with an overflow hole (34) that communicates with the first guide groove (21). And / or, the first guide groove (21) includes a first groove (211) and a second groove (212), the first groove (211) is located on the side of the second groove (212) near the support member (3) and along the axial direction of the support shaft (13), the size of the first groove (211) is larger than the size of the second groove (212), the first guide protrusion (33) is provided in the first groove (211), and the damping agent is provided in the second groove (212) and the first groove (211).

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