A new energy vehicle coating limiter durability test device

Abstract

The application discloses a kind of new energy automobile coating limit stopper durability test device, it is related to new energy automobile production technical field, including workbench, the left side of the workbench upper end face is fixed with support plate, the support plate is fixed with air cylinder, the output end of the air cylinder is fixed with tension sensor, the tension sensor is mutually fixed with first detection mechanism.The new energy automobile coating limit stopper durability test device, through the cooperative matching of first detection mechanism and second detection mechanism, the limiting resistance detection of limit stopper assembly, rotation stability detection can be completed simultaneously, and through the cooperation of impact block and first spring, the vibration state generated when car door is opened to preset position can be simulated, the actual stress and working environment of limit stopper in new energy automobile coating process are perfectly copied, the problem that existing device can only detect single performance and is disconnected with actual scene is solved, and the comprehensive durability of limit stopper can be comprehensively evaluated.

Description

Technical Field

[0001] This invention relates to the field of new energy vehicle production technology, specifically to a durability testing device for limiters used in new energy vehicle painting. Background Technology

[0002] In the production and manufacturing process of new energy vehicles, the painting process is a key link to ensure the corrosion resistance of the vehicle body and improve its appearance. As a key component of the vehicle body, the door limiter's working stability and durability directly affect the smooth progress of the painting process and the safety of the vehicle in subsequent use. The core function of the door limiter is to limit the opening angle of the door, prevent the door from opening too much during the painting process and colliding with the painting equipment and tooling, and at the same time ensure that the door remains stable at the preset angle to prevent paint dripping and dripping, thus ensuring the quality of the painting.

[0003] Currently, durability testing of limiters used in new energy vehicle painting mostly relies on traditional manual testing or simple testing devices, which have many shortcomings: 1. Traditional testing methods mainly rely on manual repeated opening and closing of the car door to simulate the working state of the limiter. This is not only labor-intensive and inefficient, but also has poor consistency in manual operation, making it impossible to accurately control the testing force and frequency, resulting in large errors in the test data and making it difficult to truly reflect the actual durability performance of the limiter. 2. Most existing simple testing devices can only test a single performance of the limiter, such as limiting resistance or rotational smoothness. They cannot simultaneously achieve comprehensive durability testing of limiting resistance, rotational stability, and vibration environment. This is out of touch with the actual working scenario of the limiter during the painting process of new energy vehicles. During the painting process, the limiter not only needs to withstand the pulling force and rotational force of the door, but also the vibration generated by the operation of the painting equipment. Single performance testing cannot comprehensively evaluate the service life of the limiter. Summary of the Invention

[0004] The purpose of this invention is to provide a durability testing device for limiters used in the painting of new energy vehicles, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a durability testing device for limiters used in the painting of new energy vehicles, comprising a worktable, a support plate fixed to the left side of the upper surface of the worktable, a cylinder fixed to the support plate, a tension sensor fixed to the output end of the cylinder, the tension sensor being fixed to a first detection mechanism, and the first detection mechanism being used to detect the limiting resistance of the limiter assembly, the first detection mechanism being connected to a second detection mechanism, and the second detection mechanism being used to detect the rotational stability of the limiter assembly, and vertical plates symmetrically fixed to the right side of the upper surface of the worktable, on which limiter assemblies are mounted.

[0006] Preferably, the limiter assembly includes a cover plate that is fixed to a vertical plate by bolts, and a fixed frame is symmetrically fixed on the front side of the cover plate, and a rotatable movable frame is symmetrically connected on the rear side of the cover plate. Connecting rods are fixed on both the movable frame and the fixed frame, and the connecting rods are connected to each other by tension springs. The distance between the movable frame and the fixed frame can be adjusted by the rotation between the movable frame and the cover plate, thereby providing a basic guarantee for unlocking and fixing the locking shaft. The elasticity of the tension spring can ensure the stability of the locking shaft when it is locked, thereby ensuring the normal operation of the device.

[0007] Preferably, a retaining shaft is slidably connected between the fixed frame and the movable frame, and the retaining shaft cooperates with the groove on the movable frame to achieve positioning. The retaining shaft is rotatably connected to one end of the limiting arm, while the other end of the limiting arm is rotatably connected to the connecting bracket. Through the rotational action between the limiting arm, the connecting bracket, and the retaining shaft, the angle of the limiting arm can be adjusted, thereby ensuring the normal operation of the device. Furthermore, the locking mechanism achieved by the retaining shaft cooperating with the groove on the movable frame ensures the stability of the device.

[0008] Preferably, the first detection mechanism includes a mounting plate fixed to the tension sensor, and square rods are symmetrically fixed on the left side of the mounting plate. A fixing block is fixed on the square rod, and an impact block is slidably connected to the fixing block. A first spring is fixed between the impact block and the fixing block. Through the sliding action between the impact block and the fixing block, the impact block can move relative to the mounting plate. With the elastic action of the first spring, a basic force can be provided for the automatic reset of the impact block, so that the impact block impacts the mounting plate, thereby simulating the slight vibration generated when the car door is opened to a preset angle, and thus realizing the stability detection function of the limiter assembly.

[0009] Preferably, the impact block is positioned by contacting the positioning plate, and the positioning plate and the impact block are symmetrically distributed. The positioning plate is symmetrically fixed on the worktable. Positioning by the impact block and the positioning plate provides a basic guarantee for the movement of the impact block relative to the mounting plate, thereby ensuring the normal operation of the device.

[0010] Preferably, the impact block is also symmetrically fixed with locking blocks at the front and rear, and the locking blocks are engaged with the limiting rod, while the limiting rod is rotatably connected to the fixing block. At the same time, a torsion spring is connected between the limiting rod and the fixing block. Through the engagement between the locking blocks and the limiting rod, the position of the impact block can be locked, thereby providing a basic guarantee for the impact of the impact block on the mounting plate. Furthermore, through the rotational action between the limiting rod and the fixing block and the elastic action of the torsion spring, a basic guarantee is provided for the stability of the engagement between the limiting rod and the locking blocks, thereby ensuring the normal operation of the device.

[0011] Preferably, the limiting rod is also connected to a rotatable roller, and the roller and the inclined plate form a rolling connection. A slider is fixed to the lower end face of the inclined plate, and the slider and the guide rail are slidably connected. The slider and the guide rail are locked together by bolts, and the guide rail is fixed to the worktable. Through the sliding guiding action between the slider and the guide rail, the distance between the roller and the inclined plate can be adjusted to accommodate limiter components of different sizes for detection. The rolling action between the roller and the inclined plate provides a basic force for the rotation of the limiting rod, thereby providing a basic guarantee for unlocking the limiting rod and the locking block.

[0012] Preferably, the second detection mechanism includes a connecting plate fixed to the connecting bracket, and guide rods are symmetrically fixed on the front and rear of the connecting plate. The guide rods are slidably connected to the mounting plate. When the connecting plate moves relative to the mounting plate, the sliding guidance between the guide rods and the mounting plate can ensure the stability of the moving connecting plate, thereby providing a basic guarantee for the detection of the rotation stability of the limit arm.

[0013] Preferably, a sliding rod is slidably connected to the lower side of the connecting plate, and the sliding rod is fixed to the sliding groove plate. The sliding groove plate is in contact with one end of the second spring, while the other end of the second spring is fixed to the pressure sensor. The pressure sensor is fixed to the connecting plate. When the rotation of the limiting arm is obstructed, the sliding action between the sliding rod and the connecting plate can cause the sliding groove plate to move relative to the connecting plate, thereby causing the second spring to contract under force. This allows the pressure sensor to detect the pressure and determine whether the rotation of the limiting arm is obstructed, ensuring the normal operation of the detection.

[0014] Preferably, the slide plate and the convex shaft are slidably connected, and the convex shaft is fixed on the disc. The disc is rotatably connected to the fixed bracket via a rotating shaft. At the same time, the fixed bracket and the mounting plate are fixed to each other. A gear is also fixed on the rotating shaft of the disc, and the gear is meshed with the convex rack. The convex rack is fixed on the worktable. When the fixed bracket moves with the mounting plate, the meshing transmission between the gear and the convex rack can make the disc and the convex shaft rotate. Combined with the sliding action between the convex shaft and the slide plate, it can provide the basic force for the movement of the slide plate and the connecting plate, thereby realizing the rotation detection function of the limit arm.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This durability testing device for limiters used in new energy vehicle painting, through the coordinated operation of the first and second testing mechanisms, can simultaneously complete the limit resistance test and rotational stability test of the limiter components. Furthermore, through the cooperation of the impact block and the first spring, it can simulate the vibration state generated when the car door is opened to a preset position, perfectly replicating the actual force and working environment of the limiter during the painting process of new energy vehicles. This solves the problem that existing devices can only test a single performance and are out of touch with actual scenarios, and can comprehensively evaluate the overall durability performance of the limiter. 2. This durability testing device for limiters used in new energy vehicle painting can accurately detect the maximum resistance when the clamping shaft separates from the groove of the movable frame through a tension sensor. The change in resistance can be used to judge the elastic failure of the tension spring in real time, thus realizing the durability monitoring of the tension spring. The pressure sensor can accurately collect the force exerted by the slide plate on the second spring. The change in the force value can be used to judge the rotational smoothness and rotational durability of the limit arm, avoiding the error of manual inspection and providing accurate data support for the quality assessment of the limiter. 3. This durability testing device for limiters used in new energy vehicle painting uses cylinders to power various testing mechanisms to automatically complete the reciprocating testing process of the limiters, eliminating the need for repeated manual operation and effectively reducing the labor intensity of operators. Simultaneously, the device can perform continuous testing over extended periods, rapidly completing the durability test of the limiters and significantly improving testing efficiency. It meets the testing needs of large-scale production of new energy vehicles. Furthermore, the sliding cooperation between the slider and the guide rail allows for adjustment of the distance between the roller and the inclined panel. The limiter components are detachably connected to the vertical plate and connecting bracket via bolts, enabling flexible adjustment and installation according to different models and sizes of limiter components used in new energy vehicle painting. This eliminates the need for separate testing devices for different specifications of limiters, effectively reducing the investment cost of testing equipment. Attached Figure Description

[0016] Figure 1 This is a frontal three-dimensional structural diagram of the overall composition of the device of the present invention; Figure 2 This is a bottom-view three-dimensional structural diagram of the overall composition of the device of the present invention; Figure 3 This is a frontal three-dimensional structural diagram of the limiter assembly of the present invention; Figure 4 This is a side-view perspective three-dimensional structural diagram of the limiter assembly of the present invention; Figure 5 This is a frontal three-dimensional structural diagram of the first detection mechanism of the present invention; Figure 6 This is a side-view three-dimensional structural diagram of the second detection mechanism of the present invention; Figure 7 This is a bottom-view three-dimensional structural diagram of the second detection mechanism of the present invention.

[0017] In the diagram: 1. Workbench; 2. Support plate; 3. Cylinder; 4. Tension sensor; 5. Vertical plate; 6. Limiter assembly; 601. Cover plate; 602. Fixed frame; 603. Movable frame; 604. Connecting rod; 605. Tension spring; 606. Snap pin; 607. Limiting arm; 608. Connecting bracket; 7. First detection mechanism; 701. Mounting plate; 702. Square rod; 703. Fixed block; 704. Impact block; 705. First spring 706. Locking block; 707. Positioning plate; 708. Limiting rod; 709. Roller; 710. Slanted panel; 711. Slider; 712. Guide rail; 8. Second detection mechanism; 801. Connecting plate; 802. Guide rod; 803. Slide rod; 804. Slide groove plate; 805. Second spring; 806. Pressure sensor; 807. Convex shaft; 808. Disc; 809. Fixed bracket; 810. Gear; 811. Convex rack. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-7 This invention provides a technical solution: a durability testing device for limiters used in new energy vehicle painting, comprising a workbench 1, a support plate 2 fixed on the left side of the upper end face of the workbench 1, a cylinder 3 fixed on the support plate 2, a tension sensor 4 fixed at the output end of the cylinder 3, the tension sensor 4 being fixed to a first detection mechanism 7, and the first detection mechanism 7 being used to detect the limiting resistance of the limiter assembly 6, the first detection mechanism 7 being connected to a second detection mechanism 8, and the second detection mechanism 8 being used to detect the rotational stability of the limiter assembly 6, and vertical plates 5 being symmetrically fixed on the right side of the upper end face of the workbench 1, with the limiter assembly 6 installed on the vertical plates 5.

[0020] The limiter assembly 6 includes a cover plate 601 fixed to the vertical plate 5 by bolts. A fixed frame 602 is symmetrically fixed to the front side of the cover plate 601, and a rotatable movable frame 603 is symmetrically connected to the rear side of the cover plate 601. Connecting rods 604 are fixed to both the movable frame 603 and the fixed frame 602, and the connecting rods 604 are connected to each other by a tension spring 605. A retaining shaft 606 is slidably connected between the fixed frame 602 and the movable frame 603, and the retaining shaft 606 engages with a groove on the movable frame 603 for positioning. One end of the retaining shaft 606 is rotatably connected to the limiting arm 607, and the other end of the limiting arm 607 is rotatably connected to the connecting bracket 608. The first detection mechanism 7 includes a mounting plate 701 fixed to the tension sensor 4. A square rod 702 is symmetrically fixed to the left side of the mounting plate 701, and a fixing block 703 is fixed to the square rod 702. An impactor is slidably connected to the fixing block 703. A first spring 705 is fixed between the impact block 704 and the fixed block 703. The impact block 704 contacts the positioning plate 707 to achieve positioning, and the positioning plate 707 and the impact block 704 are symmetrically distributed. The positioning plate 707 is symmetrically fixed on the worktable 1. The impact block 704 is also symmetrically fixed with a locking block 706, and the locking block 706 is engaged with the limiting rod 708. The limiting rod 708 is rotatably connected to the fixed block 703. At the same time, a torsion spring is connected between the limiting rod 708 and the fixed block 703. A rotatable roller 709 is also connected to the limiting rod 708, and the roller 709 is rollingly connected to the inclined plate 710. A slider 711 is fixed to the lower end face of the inclined plate 710. The slider 711 is slidably connected to the guide rail 712. The slider 711 and the guide rail 712 are locked by bolts, and the guide rail 712 is fixed on the worktable 1. When using this durability testing device for limiters used in new energy vehicle painting, such as Figures 1-7 As shown, firstly, the cover plate 601 is fixed to the vertical plate 5 with bolts, and then the connecting bracket 608 is fixed to the connecting plate 801 with bolts, thereby realizing the installation and fixation of the limiter assembly 6. At this time, the retaining shaft 606 cooperates with the groove on the right side of the movable frame 603 to realize the positioning of the limit arm 607. Figure 1As shown, the first spring 705 is in a contracted state, the cylinder 3 is in an extended state, and the locking block 706 and the limiting rod 708 are engaged. During detection, the cylinder 3 contracts, which moves the tension sensor 4, the mounting plate 701, and the connecting plate 801, thereby moving the connecting bracket 608 and the limiting arm 607. The locking shaft 606 is positioned with the right-side groove on the movable frame 603, and the tension spring 605 ensures the stability of the engagement between the locking shaft 606 and the right-side groove on the movable frame 603. That is, when the connecting plate 801 moves the connecting bracket 608 and the limiting arm 607, it needs to overcome the resistance between the locking shaft 606 and the right-side groove on the movable frame 603. When the tension on the limiting arm 607 is greater than that on the locking shaft... When the resistance between 606 and the right groove on the movable frame 603 is encountered, the movable frame 603 is forced to swing, thereby causing the retaining shaft 606 to separate from the right groove on the movable frame 603 until the retaining shaft 606 engages with the left groove on the movable frame 603 to achieve positioning. Based on the above principle, by controlling the extension and retraction of the cylinder 3, the retaining shaft 606 can alternately engage with the left and right grooves on the movable frame 603, thereby simulating the installation and use state of the limiter assembly 6. In addition, with the tension sensor 4, the maximum resistance encountered when the retaining shaft 606 separates from the right groove on the movable frame 603 can be detected. During long-term testing, if the elasticity of the tension spring 605 fails, the resistance encountered when the retaining shaft 606 separates from the right groove on the movable frame 603 will be reduced, thereby achieving the durability testing function of the tension spring 605. When cylinder 3 retracts and moves mounting plate 701 to the left, it simultaneously moves impact block 704, limit rod 708, and roller 709 to the left. When roller 709 rolls in contact with inclined panel 710, it can cause limit rod 708 to deflect under force. When locking shaft 606 engages with the left groove on movable frame 603, limit rod 708 separates from locking block 706, thus engaging the limiting function of impact block 704. Consequently, impact block 704 moves towards mounting plate 701 under the elastic action of first spring 705 to impact, thereby causing the device to vibrate. This simulates the vibration state generated when the car door is opened to a preset position, thus better reflecting reality. In use, the limiter assembly 6 is used to perform its detection function. When the cylinder 3 extends and drives the mounting plate 701 and the impact block 704 to move to the right, when the impact block 704 contacts the positioning plate 707, the continued rightward movement of the mounting plate 701 can move the impact block 704 relative to the mounting plate 701 until the locking block 706 on the impact block 704 engages with the limit rod 708 again. At this time, the locking shaft 606 moves to engage with the right groove on the movable frame 603. According to the sliding action between the slider 711 and the guide rail 712, the distance between the roller 709 and the inclined plate 710 can be adjusted to accommodate limiter assemblies 6 of different sizes for detection. The second detection mechanism 8 includes a connecting plate 801 fixed to the connecting bracket 608, and guide rods 802 are symmetrically fixed on the connecting plate 801, with the guide rods 802 slidably connected to the mounting plate 701; a sliding rod 803 is slidably connected to the lower side of the connecting plate 801, and the sliding rod 803 is fixed to the sliding groove plate 804, with one end of the sliding groove plate 804 in contact with the second spring 805, while the other end of the second spring 805 is fixed to the pressure sensor 806. Pressure sensor 806 is fixed to connecting plate 801; slide plate 804 is slidably connected to convex shaft 807, and convex shaft 807 is fixed on disc 808, and disc 808 is rotatably connected to fixed bracket 809 through rotating shaft, while fixed bracket 809 is fixed to mounting plate 701. Gear 810 is also fixed on rotating shaft of disc 808, and gear 810 is meshed with convex rack 811, and convex rack 811 is fixed on worktable 1; During the testing of limiter assembly 6, such as Figures 1-7 As shown, when the cylinder 3 retracts, it drives the mounting plate 701 and the connecting plate 801 to move to the left, simultaneously driving the gear 810 to move. The meshing transmission between the gear 810 and the convex rack 811 allows the disc 808 and the convex shaft 807 to rotate. The sliding action between the convex shaft 807 and the sliding plate 804 allows the sliding plate 804 to move back and forth in an orderly manner. The flexible support provided by the second spring 805 between the sliding plate 804 and the connecting plate 801 allows the connecting plate 801 to move back and forth synchronously on the sliding plate 804, thereby driving the connecting bracket 608 to reciprocate. The rotational action between the limiting arm 607 and the locking shaft 606, and the moving action of the limiting arm 607, ensures the normal reciprocating motion of the connecting bracket 608. At this time, the limiting arm 607 is subjected to force relatively relative to the locking shaft 606. Rotation occurs between shaft 606 and connecting bracket 608, which allows detection of whether the limit arm 607 rotates smoothly. If the limit arm 607 rotates smoothly, the force exerted on the second spring 805 when the slide plate 804 and connecting plate 801 move back and forth is small, meaning the value detected by pressure sensor 806 is small. If the limit arm 607 cannot rotate smoothly, the inability of the limit arm 607 to rotate smoothly causes the connecting bracket 608 to resist the back and forth movement of the connecting plate 801. Consequently, the connecting plate 801 cannot move smoothly back and forth synchronously with the slide plate 804, resulting in a larger force exerted by the slide plate 804 on the second spring 805. This causes the second spring 805 to contract, increasing the value detected by pressure sensor 806, thus enabling the detection of the rotational durability of the limit arm 607.

[0021] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of the present invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A durability testing device for limiters used in the painting of new energy vehicles, comprising a workbench (1), characterized in that: A support plate (2) is fixed on the left side of the upper end face of the workbench (1). A cylinder (3) is fixed on the support plate (2). A tension sensor (4) is fixed at the output end of the cylinder (3). The tension sensor (4) is fixed to the first detection mechanism (7). The first detection mechanism (7) is used to realize the limiting resistance detection function of the limiter assembly (6). The first detection mechanism (7) is connected to the second detection mechanism (8). The second detection mechanism (8) is used to realize the rotational stability detection function of the limiter assembly (6). A vertical plate (5) is symmetrically fixed on the right side of the upper end face of the workbench (1). The limiter assembly (6) is installed on the vertical plate (5).

2. The durability testing device for limiters used in new energy vehicle painting according to claim 1, characterized in that: The limiter assembly (6) includes a cover plate (601) that is fixed to the vertical plate (5) by bolts. A fixed frame (602) is symmetrically fixed on the front side of the cover plate (601), and a rotatable movable frame (603) is symmetrically connected on the rear side of the cover plate (601). A connecting rod (604) is fixed on both the movable frame (603) and the fixed frame (602). The connecting rods (604) are connected to each other by a tension spring (605).

3. The durability testing device for limiters used in new energy vehicle painting according to claim 2, characterized in that: The fixed frame (602) and the movable frame (603) are slidably connected by a retaining shaft (606), and the retaining shaft (606) is positioned by engaging with the groove on the movable frame (603). The retaining shaft (606) is rotatably connected to one end of the limiting arm (607), while the other end of the limiting arm (607) is rotatably connected to the connecting bracket (608).

4. The durability testing device for limiters used in new energy vehicle painting according to claim 1, characterized in that: The first detection mechanism (7) includes a mounting plate (701) fixed to the tension sensor (4), and a square rod (702) is symmetrically fixed on the left side of the mounting plate (701). A fixing block (703) is fixed on the square rod (702), and an impact block (704) is slidably connected on the fixing block (703). A first spring (705) is fixed between the impact block (704) and the fixing block (703).

5. The durability testing device for limiters used in new energy vehicle painting according to claim 4, characterized in that: The impact block (704) contacts the positioning plate (707) to achieve positioning, and the positioning plate (707) and the impact block (704) are symmetrically distributed, and the positioning plate (707) is symmetrically fixed on the worktable (1) from front to back.

6. The durability testing device for limiters used in new energy vehicle painting according to claim 5, characterized in that: The impact block (704) is also symmetrically fixed with a locking block (706) at the front and back, and the locking block (706) and the limiting rod (708) are engaged, and the limiting rod (708) and the fixing block (703) are rotatably connected. At the same time, a torsion spring is connected between the limiting rod (708) and the fixing block (703).

7. The durability testing device for limiters used in new energy vehicle painting according to claim 6, characterized in that: The limiting rod (708) is also connected to a rotatable roller (709), and the roller (709) and the inclined plate (710) form a rolling connection. The lower end face of the inclined plate (710) is fixed with a slider (711), and the slider (711) and the guide rail (712) are slidably connected. The slider (711) and the guide rail (712) are locked together by bolts, and the guide rail (712) is fixed on the worktable (1).

8. The durability testing device for limiters used in new energy vehicle painting according to claim 7, characterized in that: The second detection mechanism (8) includes a connecting plate (801) fixed to the connecting bracket (608), and guide rods (802) are symmetrically fixed on the connecting plate (801) from front to back, and the guide rods (802) and the mounting plate (701) are slidably connected.

9. The durability testing device for limiters used in new energy vehicle painting according to claim 8, characterized in that: A slide rod (803) is slidably connected to the lower side of the connecting plate (801), and the slide rod (803) is fixed to the slide plate (804). The slide plate (804) is in contact with one end of the second spring (805), while the other end of the second spring (805) is fixed to the pressure sensor (806). The pressure sensor (806) is fixed to the connecting plate (801).

10. The durability testing device for limiters used in new energy vehicle painting according to claim 9, characterized in that: The slide plate (804) and the convex shaft (807) are slidably connected, and the convex shaft (807) is fixed on the disc (808). The disc (808) is rotatably connected to the fixed bracket (809) through the rotating shaft. At the same time, the fixed bracket (809) and the mounting plate (701) are fixed to each other. A gear (810) is also fixed on the rotating shaft of the disc (808). The gear (810) and the convex rack (811) are meshed. The convex rack (811) is fixed on the worktable (1).

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