Armrest box hinge fatigue testing device

Abstract

The utility model relates to hinge performance test technical field, and disclose a handrail box hinge fatigue testing device, including bottom plate, the top of bottom plate is provided with handrail box and testing mechanism, the testing mechanism includes the first U -shaped frame and second U -shaped frame that welds in the top of bottom plate and is located handrail box both sides, the inboard slide of second U -shaped frame is installed with first square plate. The utility model rotates knob to drive screw rod rotation, drive first square plate along second U -shaped frame sliding, synchronous adaptation second square plate's position, and further adjust the spacing of both sides round block, long board, this structure need not to dismantle replacement fixture, can flexible adaptation different width, size's handrail box sample, greatly reduced the adjustment difficulty when sample replacement, shortened preparation time, effectively promoted the compatibility and test efficiency of device to multiple specifications handrail box.

Description

Technical Field

[0001] This utility model relates to the field of hinge performance testing technology, and more specifically, to a fatigue testing device for armrest box hinges. Background Technology

[0002] In the automotive parts manufacturing industry, the armrest box, as an important storage and comfort component inside the vehicle, has its hinge fatigue life directly affecting product quality and user experience. To ensure that the armrest box hinge does not experience failures such as breakage or jamming during long-term use, it is necessary to conduct open-close cycle tests using a specialized fatigue testing device to verify its durability.

[0003] Existing armrest box hinge fatigue testing devices typically include a fixed base, a positioning mechanism for clamping the armrest box, and an actuator for driving the hinge movement. The general operating procedure is as follows: the armrest box is fixed to the base; the relative position of the clamping component and the armrest box hinge is adjusted manually or mechanically to connect the actuator to the armrest box lid; then the device is started, using a motor or cylinder to drive the armrest box lid to repeatedly open and close until a preset number of cycles is reached or the hinge fails, thereby evaluating the hinge's fatigue performance.

[0004] However, the existing device has significant shortcomings in practical use: due to the large differences in armrest box dimensions among different car models (different widths, hinge installation spacing), testing different specifications of armrest boxes requires frequent disassembly or replacement of the positioning mechanism's fixtures, and even adjustment of the overall installation position of the actuator. For example, when switching from a narrow armrest box to a wide armrest box, the fixture fixing bolts must be loosened, the positioning block adapted to the narrow version removed, and then the positioning component adapted to the wide version installed and recalibrated. The entire process often takes more than 30 minutes, and repeated disassembly can easily lead to a decrease in positioning accuracy. This adjustment method is not only cumbersome and time-consuming, but also affects the consistency of test data due to the cumulative error during fixture replacement, reducing testing efficiency and reliability. Therefore, improvements are needed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, this utility model provides a fatigue testing device for armrest box hinges, which has the advantage of improving testing efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fatigue testing device for armrest box hinges, comprising a base plate, an armrest box and a testing mechanism disposed above the base plate, the testing mechanism comprising a first U-shaped frame and a second U-shaped frame welded above the base plate and located on both sides of the armrest box, a first square plate slidably mounted on the inner side of the second U-shaped frame, a second square plate slidably mounted on the inner side of the first U-shaped frame, a knob rotatably mounted above the second U-shaped frame, a lead screw extending to the surface of the base plate welded below the knob, the first square plate threadedly sleeved on the outer side of the lead screw, round blocks rotatably mounted on the outer sides of both the second and first square plates, a long plate fixedly sleeved on the outer side of the round blocks, a first cylinder bolted to the front end of the long plate, a third U-shaped plate welded above the two long plates, a mounting plate disposed at the front end of the first cylinder, a second cylinder bolted to the inner side of the mounting plate, and a clamping plate bolted to the front end of the second cylinder.

[0007] As a preferred embodiment of this utility model, two short plates are welded to the inner side of the mounting plate, and a circular plate is welded to the outer side of the short plates. A connecting shaft is welded between the inner sides of the two circular plates, and the output end of the first cylinder is movably sleeved on the outer side of the connecting shaft.

[0008] As a preferred embodiment of this utility model, a detector is provided above the base plate, and a signal receiving plate is provided on the outer side of the mounting plate.

[0009] As a preferred embodiment of this utility model, a side plate is welded to the outer side of the second square plate, and a driving mechanism is provided on the outer side of the side plate. The driving mechanism includes an L-shaped plate welded to the outer side of the side plate, a servo motor is bolted between the inner sides of the L-shaped plate, a second gear is rotatably mounted on the outer side of the side plate, the output end of the servo motor is bolted to the outer side of the second gear, and a first gear is bolted to the front end of the circular block on the right side. The first gear meshes with the second gear.

[0010] As a preferred embodiment of this utility model, the two short plates are symmetrically distributed on the inner side of the mounting plate, and the central axes of the two short plates are parallel to the vertical center line of the mounting plate. The end of each short plate away from the mounting plate is welded and fixed to the center position of one side of the corresponding circular plate.

[0011] As a preferred embodiment of this utility model, the two ends of the third U-shaped plate are welded and fixed to the top center of the two long plates respectively, and the length direction of the third U-shaped plate is perpendicular to the length direction of the long plates.

[0012] As a preferred embodiment of this utility model, the centerlines of the first gear and the second gear are on the same horizontal plane, and the meshing gap between them is no greater than 0.mm.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model features a first U-shaped frame and a second U-shaped frame welded and fixed to the top of the base plate and located on both sides of the armrest box. These are complemented by a knob rotatably mounted on the top of the second U-shaped frame, a lead screw welded below the knob and extending to the surface of the base plate, a first square plate threaded onto the outside of the lead screw, and a second square plate slidably mounted on the inside of the first U-shaped frame. Simply rotating the knob drives the lead screw to rotate, causing the first square plate to slide along the second U-shaped frame, simultaneously adapting to the position of the second square plate, thereby adjusting the spacing between the round blocks and long plates on both sides. This structure eliminates the need to disassemble and replace the fixtures, flexibly adapting to armrest box samples of different widths and sizes. This significantly reduces the difficulty of adjustment during sample replacement, shortens preparation time, and effectively improves the compatibility and testing efficiency of the device for armrest boxes of various specifications.

[0015] 2. This utility model welds two short plates to the inside of the mounting plate, and a circular plate to the outside of the short plates. A connecting shaft is welded between the inner sides of the two circular plates. The output end of the first cylinder is movably sleeved on the outside of the connecting shaft. When the first cylinder drives the mounting plate to move, the connecting shaft can rotate flexibly along the output end of the first cylinder. In conjunction with the second cylinder bolted to the inside of the mounting plate and the clamping plate bolted to the front end of the second cylinder, the clamping plate can be pushed by the second cylinder to firmly clamp the cover of the armrest box. At the same time, the rotation of the connecting shaft can compensate for the angular displacement of the armrest box cover during opening / closing, avoiding force jamming or separation between the clamping plate and the cover. This ensures that the armrest box hinge is always in the preset stress state during the test, significantly improving the stability and data accuracy of fatigue testing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the testing mechanism of this utility model;

[0018] Figure 3 This is a schematic diagram of the drive mechanism of this utility model;

[0019] Figure 4 for Figure 3 A magnified schematic diagram of the local structure at point A;

[0020] Figure 5 This is a schematic diagram of the exploded structure of the drive mechanism of this utility model.

[0021] In the diagram: 1. Base plate; 2. Armrest box; 3. Detector; 4. Testing mechanism; 401. First U-shaped frame; 402. Second U-shaped frame; 403. Knob; 404. Lead screw; 405. First square plate; 406. Second square plate; 407. Side plate; 408. Round block; 409. Long plate; 410. Third U-shaped plate; 411. First cylinder; 412. Mounting plate; 413. Signal receiving plate; 414. Short plate; 415. Round plate; 416. Connecting shaft; 417. Second cylinder; 418. Clamping plate; 5. Drive mechanism; 51. First gear; 52. L-shaped plate; 53. Servo motor; 54. Second gear. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 5 As shown, this utility model provides a fatigue testing device for armrest box hinges, including a base plate 1, an armrest box 2 and a testing mechanism 4 disposed above the base plate 1. The testing mechanism 4 includes a first U-shaped frame 401 and a second U-shaped frame 402 welded above the base plate 1 and located on both sides of the armrest box 2. A first square plate 405 is slidably installed on the inner side of the second U-shaped frame 402, and a second square plate 406 is slidably installed on the inner side of the first U-shaped frame 401. A knob 403 is rotatably installed above the second U-shaped frame 402, and an extension extending to the surface of the base plate 1 is welded below the knob 403. The lead screw 404 has a first square plate 405 threadedly sleeved on the outside of the lead screw 404. A round block 408 is rotatably mounted on the outside of both the second square plate 406 and the first square plate 405. A long plate 409 is fixedly sleeved on the outside of the round block 408. A first cylinder 411 is bolted to the front end of the long plate 409. A third U-shaped plate 410 is welded above the two long plates 409. A mounting plate 412 is provided at the front end of the first cylinder 411. A second cylinder 417 is bolted to the inner side of the mounting plate 412. A clamping plate 418 is bolted to the front end of the second cylinder 417.

[0024] The output end of the first cylinder 411 transmits the driving force to the mounting plate 412, which is connected by the short plate 414 and the round plate 415, through a structure that is movably sleeved on the outside of the connecting shaft 416. When the cover of the armrest box 2 moves, the connecting shaft 416 can rotate relative to the output end of the first cylinder 411 to compensate for the angle deviation and avoid rigid pulling between the clamping plate 418 and the cover.

[0025] By setting a first U-shaped frame 401 and a second U-shaped frame 402 welded and fixed above the base plate 1 and located on both sides of the armrest box 2, and cooperating with a knob 403 rotatably installed above the second U-shaped frame 402, a lead screw 404 welded below the knob 403 and extending to the surface of the base plate 1, and a first square plate 405 threadedly sleeved on the outside of the lead screw 404, and a second square plate 406 slidably installed on the inside of the first U-shaped frame 401, simply rotating the knob 403 can drive the lead screw 404 to rotate, causing the first square plate 405 to slide along the second U-shaped frame 402, synchronously adapting to the position of the second square plate 406, thereby adjusting the spacing between the two round blocks 408 and the long plate 409; this structure can flexibly adapt to armrest box 2 samples of different widths and sizes without disassembling and replacing the fixtures, greatly reducing the adjustment difficulty when changing samples, shortening the preparation time, and effectively improving the compatibility and testing efficiency of the device for armrest boxes of multiple specifications.

[0026] Two short plates 414 are welded to the inner side of the mounting plate 412, and a round plate 415 is welded to the outer side of the short plates 414. A connecting shaft 416 is welded between the inner sides of the two round plates 415, and the output end of the first cylinder 411 is movably sleeved on the outer side of the connecting shaft 416.

[0027] The output end of the first cylinder 411 transmits the driving force to the mounting plate 412, which is connected by the short plate 414 and the round plate 415, through a structure that is movably sleeved on the outside of the connecting shaft 416. When the cover of the armrest box 2 moves, the connecting shaft 416 can rotate relative to the output end of the first cylinder 411 to compensate for the angle deviation and avoid rigid pulling between the clamping plate 418 and the cover.

[0028] By welding two short plates 414 to the inside of the mounting plate 412, welding a circular plate 415 to the outside of the short plates 414, and welding a connecting shaft 416 between the inner sides of the two circular plates 415, and movably connecting the output end of the first cylinder 411 to the outside of the connecting shaft 416, the connecting shaft 416 can rotate flexibly along the output end of the first cylinder 411 when the first cylinder 411 drives the mounting plate 412 to move. This, together with the second cylinder 417 bolted to the inside of the mounting plate 412 and the clamping plate 418 bolted to the front end of the second cylinder 417, can both push the clamping plate 418 to firmly clamp the cover of the armrest box 2 through the second cylinder 417, and compensate for the angular displacement during the opening / closing process of the armrest box cover through the rotation of the connecting shaft 416, avoiding force jamming or separation between the clamping plate 418 and the cover, ensuring that the armrest box hinge is always in the preset stress state during the test, and significantly improving the stability and data accuracy of the fatigue test.

[0029] The detector 3 is installed on the top of the base plate 1, and the signal receiving plate 413 is installed on the outside of the mounting plate 412.

[0030] During the test, the signal receiving board 413 collects the motion parameters of the mounting board 412 in real time and transmits them to the detector 3; the detector 3 processes and analyzes the data, monitors the test status, and can trigger a shutdown or alarm when an abnormality is detected.

[0031] Among them, a side plate 407 is welded to the outer side of the second square plate 406, and a drive mechanism 5 is provided on the outer side of the side plate 407. The drive mechanism 5 includes an L-shaped plate 52 welded to the outer side of the side plate 407. A servo motor 53 is bolted between the inner sides of the L-shaped plate 52. A second gear 54 is rotatably mounted on the outer side of the side plate 407. The output end of the servo motor 53 is bolted to the outer side of the second gear 54. A first gear 51 is bolted to the front end of the right circular block 408. The first gear 51 meshes with the second gear 54.

[0032] The servo motor 53 is fixed to the side plate 407 via the L-shaped plate 52. Its output end drives the second gear 54 to rotate. The second gear 54 meshes with the first gear 51 on the right circular block 408, transmitting power to the circular block 408. The circular block 408 drives the long plate 409 to rotate, driving the clamping plate 418 to drive the armrest box 2 to complete the action. The number of cycles and the rotation angle are precisely controlled by the servo motor 53.

[0033] The two short plates 414 are symmetrically distributed on the inner side of the mounting plate 412, and the central axis of the two short plates 414 is parallel to the vertical center line of the mounting plate 412. The end of each short plate 414 away from the mounting plate 412 is welded and fixed to the center position of one side of the corresponding circular plate 415.

[0034] The symmetrical distribution of the two short plates 414 on the inner side of the mounting plate 412 and their central connection with the circular plate 415 ensure that the connecting shaft 416 is subjected to balanced force. When the first cylinder 411 is driven, the symmetrical structure makes the forces on both sides of the mounting plate 412 consistent, preventing the mounting plate 412 from tilting or the clamping plate 418 from shifting.

[0035] The two ends of the third U-shaped plate 410 are welded and fixed to the top center of the two long plates 409 respectively, and the length direction of the third U-shaped plate 410 is perpendicular to the length direction of the long plates 409.

[0036] The third U-shaped plate 410 is vertically welded to the center of the top of the two long plates 409 to form a rigid connection, ensuring that the two long plates 409 rotate synchronously under the drive of the round block 408; when adjusting the distance between the first square plate 405 and the second square plate 406, the third U-shaped plate 410 moves synchronously with the long plates 409 to maintain the symmetry of the two sides of the mechanism.

[0037] The axis of the first gear 51 and the second gear 54 are on the same horizontal plane, and the meshing gap between them is no more than 0.2 mm.

[0038] The first gear 51 and the second gear 54 have coplanar axes and a meshing clearance of ≤0.2mm, ensuring that the power of the servo motor 53 is transmitted to the circular block 408 without any off-center load; the small clearance reduces the transmission backlash error, making the rotation angle of the circular block 408 consistent with the control command of the servo motor 53, thus ensuring the accuracy of the test angle.

[0039] Working principle and usage process of this utility model:

[0040] Place the base plate 1 on a horizontal workbench and check the connection status of the testing mechanism 4 and the drive mechanism 5. Place the armrest box 2 to be tested above the base plate 1, positioning it between the two testing mechanisms. Rotate the knob 403 to drive the lead screw 404 to rotate, causing the first square plate 405 and the second square plate 406 to slide along the inner side of the U-shaped frame until the two circular blocks 408 are aligned with the armrest box hinge position, completing the initial positioning of the sample. Activate the second cylinder 417 to push the clamping plate 418 towards the lid of the armrest box 2 until the clamping plate 418 is tightly attached to the lid surface, achieving a stable clamping of the lid. Through the linkage structure of the long plate 409 and the third U-shaped plate 410, ensure that the clamping mechanisms on both sides move synchronously, avoiding the lid from shifting under force. Test parameter settings and detection preparation: Check the signal connection between the detector 3 and the signal receiving board 413 to ensure that parameters such as displacement and torque can be monitored in real time during the test process. The test cycle count and rotation angle are set by the control system of servo motor 53; angle control and movement speed are achieved through the meshing transmission of the first gear 51 and the second gear 54; and the thrust parameters for opening / closing the cover are set by the first cylinder 411. During fatigue testing, the drive mechanism 5 is activated. Servo motor 53 drives the circular block 408 to rotate via gear transmission, which in turn drives the clamping plate 418 via the long plate 409 to complete the opening-closing cycle of the armrest cover. The first cylinder 411 provides stable thrust during the cycle through the cooperation of the connecting shaft 416 and the circular plate 415, simulating the force state during actual use. The signal receiving board 413 collects motion parameters in real time and feeds them back to the detector 3. When the device completes the preset number of cycles, or when the detector 3 detects abnormal signals such as hinge breakage or jamming, the device automatically stops operating. The number of cycles stored in the detector 3 and the angle / torque parameters at the time of failure are recorded. The second cylinder 417 is released to remove the armrest box 2, completing the test process.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fatigue testing device for armrest box hinges, comprising a base plate (1), characterized in that: A handrail box (2) and a testing mechanism (4) are provided above the base plate (1). The testing mechanism (4) includes a first U-shaped frame (401) and a second U-shaped frame (402) welded above the base plate (1) and located on both sides of the handrail box (2). A first square plate (405) is slidably installed on the inner side of the second U-shaped frame (402), and a second square plate (406) is slidably installed on the inner side of the first U-shaped frame (401). A knob (403) is rotatably installed above the second U-shaped frame (402), and a lead screw (404) extending to the surface of the base plate (1) is welded below the knob (403). The first square plate (405) A threaded sleeve is attached to the outside of the lead screw (404). A round block (408) is rotatably mounted on the outside of both the second square plate (406) and the first square plate (405). A long plate (409) is fixedly sleeved on the outside of the round block (408). A first cylinder (411) is bolted to the front end of the long plate (409). A third U-shaped plate (410) is welded above the two long plates (409). A mounting plate (412) is provided at the front end of the first cylinder (411). A second cylinder (417) is bolted to the inside of the mounting plate (412). A clamping plate (418) is bolted to the front end of the second cylinder (417).

2. The armrest box hinge fatigue testing device according to claim 1, characterized in that: Two short plates (414) are welded to the inner side of the mounting plate (412), and a round plate (415) is welded to the outer side of the short plates (414). A connecting shaft (416) is welded between the inner sides of the two round plates (415), and the output end of the first cylinder (411) is movably sleeved on the outer side of the connecting shaft (416).

3. The armrest box hinge fatigue testing device according to claim 1, characterized in that: A detector (3) is provided above the base plate (1), and a signal receiving plate (413) is provided on the outside of the mounting plate (412).

4. The armrest box hinge fatigue testing device according to claim 1, characterized in that: A side plate (407) is welded to the outside of the second square plate (406). A drive mechanism (5) is provided on the outside of the side plate (407). The drive mechanism (5) includes an L-shaped plate (52) welded to the outside of the side plate (407). A servo motor (53) is bolted between the inner sides of the L-shaped plate (52). A second gear (54) is rotatably mounted on the outside of the side plate (407). The output end of the servo motor (53) is bolted to the outside of the second gear (54). A first gear (51) is bolted to the front end of the right circular block (408). The first gear (51) meshes with the second gear (54).

5. The armrest box hinge fatigue testing device according to claim 2, characterized in that: The two short plates (414) are symmetrically distributed on the inner side of the mounting plate (412), and the central axis of the two short plates (414) is parallel to the vertical center line of the mounting plate (412). The end of each short plate (414) away from the mounting plate (412) is welded and fixed to the center position of one side of the corresponding circular plate (415).

6. The armrest box hinge fatigue testing device according to claim 1, characterized in that: The two ends of the third U-shaped plate (410) are welded and fixed to the top center of the two long plates (409), and the length direction of the third U-shaped plate (410) is perpendicular to the length direction of the long plates (409).

7. The armrest box hinge fatigue testing device according to claim 4, characterized in that: The axis of the first gear (51) and the second gear (54) are on the same horizontal plane, and the meshing gap between them is no more than 0.2 mm.

Images