Bullet test fixture

Abstract

The embodiment of the application provides a shell test tool, which comprises a seat body, a first connecting piece, a second connecting piece and a driving assembly. The seat body comprises a base and a mounting seat, and the mounting seat is arranged on the base. The first connecting piece is arranged on the base and is configured to be connected with a fixed end of the shell. The second connecting piece is movably arranged on the mounting seat along the height direction of the mounting seat and is configured to be connected with a movable end of the shell. The driving assembly is arranged on the mounting seat and is configured to drive the second connecting piece to move. In this way, the shell test tool provided by the application simulates the elastic deformation state of the shell in the actual use process, realizes automatic testing of the fatigue life of the shell, effectively reduces the labor intensity, improves the testing frequency and continuity, can more accurately reflect the actual service life of the shell, is convenient for realizing a standardized testing process, and is suitable for large-batch detection requirements in an industrial field.

Description

Technical Field

[0001] This application relates to the field of shrapnel testing technology, and in particular to a shrapnel testing fixture. Background Technology

[0002] In the electronics, electrical, and machinery industries, springs, as a common elastic contact element, are widely used in products such as switches, connectors, and relays. The performance of springs directly affects the stability and service life of equipment, especially in environments with frequent switching or vibration, where fatigue life becomes one of the key indicators.

[0003] However, the spring life testing methods in related technologies usually adopt manual operation or simple fixtures with manual pressing. The testing method relies on repeated manual pressing, which is not only labor-intensive, but also difficult to achieve continuous and high-frequency testing. Utility Model Content

[0004] This application provides a shrapnel testing fixture to improve at least one of the above-mentioned technical problems.

[0005] This application provides a spring fragment testing fixture, including:

[0006] A base body, the base body including a base and a mounting base, the mounting base being disposed on the base;

[0007] A first connector is disposed on the base and configured to connect to the fixed end of the spring piece;

[0008] A second connector, movably disposed on the mounting base along the height direction of the mounting base, and configured to connect with the movable end of the spring; and

[0009] A drive component is disposed on the mounting base and configured to drive the second connector to move.

[0010] In some embodiments, the driving component includes:

[0011] An eccentric shaft having a first shaft and a second shaft connected to each other, the axis of the first shaft being parallel to and not coincident with the axis of the second shaft, the first shaft being rotatably connected to the mounting base;

[0012] A connecting rod, one end of which is rotatably connected to the second shaft, and the other end of which is rotatably connected to the second connecting member;

[0013] A drive motor is mounted on the mounting base and has an output shaft connected to the first shaft to drive the eccentric shaft to rotate.

[0014] In some embodiments, the drive assembly further includes a first deep groove ball bearing, the inner ring of which is fixedly connected to the first shaft, and the outer ring of which is fixedly connected to the mounting base.

[0015] In some embodiments, the drive assembly further includes a second deep groove ball bearing, the inner ring of which is fixedly connected to the second shaft, and the outer ring of which is fixedly connected to the connecting rod.

[0016] In some implementations, the driving component further includes:

[0017] A first limiting member and a second shaft passing through the connecting rod, wherein the first limiting member cooperates with the connecting rod to clamp the second deep groove ball bearing.

[0018] In some embodiments, the drive assembly further includes a third deep groove ball bearing, the inner ring of which is fixedly connected to the second connector, and the outer ring of which is fixedly connected to the connecting rod.

[0019] In some implementations, the driving component further includes:

[0020] A connecting shaft, one end of which passes through the connecting rod and is connected to the inner ring of the third deep groove ball bearing, and the other end of which is connected to the second connecting member; and

[0021] The second limiting member is connected to the connecting rod and cooperates with the connecting rod to clamp the third deep groove ball bearing.

[0022] In some embodiments, the connecting rod is provided with weight reduction holes that extend through both opposite sides of the connecting rod and extend along the length of the connecting rod.

[0023] In some embodiments, the mounting base has a first side and a second side facing away from each other, the first side facing the drive motor and the second side facing the connecting rod, the first connector and the second connector.

[0024] In some embodiments, the spring test fixture further includes a slider and a slide rail, the slider and the slide rail being slidably engaged, and both the slider and the slide rail extending along the height direction of the mounting base;

[0025] One of the mounting base and the second connector is provided with the slider, and the other of the mounting base and the second connector is provided with the slide rail.

[0026] The spring clip testing fixture provided in this application includes a base, a first connector, a second connector, and a drive assembly. The base includes a base and a mounting base, with the mounting base disposed on the base. The first connector is disposed on the base and configured to connect to the fixed end of the spring clip. The second connector is movably disposed on the mounting base along the height direction and configured to connect to the movable end of the spring clip. The drive assembly is disposed on the mounting base and configured to drive the second connector to move. Thus, compared to traditional manual operation or simple fixture testing methods, this application uses a base as an overall support structure, combined with the first and second connectors used to fix the fixed and movable ends of the spring clip respectively. The drive assembly then drives the second connector to reciprocate, simulating the elastic deformation state of the spring clip during actual use. This achieves automatic testing of the spring clip's fatigue life, effectively reducing labor intensity, increasing testing frequency and continuity, more accurately reflecting the actual service life of the spring clip, facilitating standardized testing processes, and is suitable for large-scale testing needs in industrial settings. In addition, the spring test fixture has good adaptability and adjustability, and the driving parameters and connection positions can be adjusted according to the needs of springs of different specifications, which improves the versatility and practicality of the spring test fixture. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0028] Figure 1 This is a schematic diagram of the structure of the spring test fixture provided in the embodiments of this application.

[0029] Figure 2 for Figure 1 A schematic diagram of part of the structure of the shrapnel testing fixture.

[0030] Figure 3 for Figure 2 An exploded structural diagram of some parts of the shrapnel testing fixture.

[0031] Explanation of icon numbers:

[0032] 10. Spring testing fixture; 100. Base; 110. Base; 120. Mounting seat; 200. First connecting piece; 300. Second connecting piece; 400. Drive assembly; 410. Eccentric shaft; 411. First shaft; 412. Second shaft; 420. Connecting rod; 421. Weight reduction hole; 430. Drive motor; 431. Output shaft; 440. First deep groove ball bearing; 450. Second deep groove ball bearing; 460. First limiting piece; 470. Third deep groove ball bearing; 480. Connecting shaft; 490. Second limiting piece; 510. Slider; 520. Slide rail; 600. Housing. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0035] In the electronics, electrical, and machinery industries, spring contacts, as a common elastic contact element, are widely used in products such as switches, connectors, and relays. The performance of spring contacts directly affects the stability and service life of equipment, especially in environments with frequent switching or vibration, where fatigue life becomes one of the key indicators. However, the applicant has found that spring contact life testing methods in related technologies typically employ manual operation or simple fixtures with manual pressing. These methods rely on repeated manual pressing, which is not only labor-intensive but also makes it difficult to achieve continuous, high-frequency testing.

[0036] In view of this, please refer to Figure 1 This application provides a spring test fixture 10, which includes a base 100, a first connector 200, a second connector 300, and a drive assembly 400.

[0037] The base 100 includes a base 110 and a mounting base 120. The mounting base 120 is disposed on the base 110 and constitutes the basic support structure of the entire device. The base 110 is used to maintain the stability of the entire testing device, while the mounting base 120 provides a mounting platform for other functional components.

[0038] The first connector 200 is disposed on the base 110 and configured to connect with the fixed end of the spring piece. The first connector 200 may adopt a clamping structure, a screw fastening structure, or other adaptable form to ensure that the fixed end of the spring piece remains firmly stationary during testing. The first connector 200 may be a plate-like structure or a frame structure.

[0039] The second connector 300 is movably disposed on the mounting base 120 along the height direction of the mounting base 120 and configured to connect with the movable end of the spring. The second connector 300 can slide up and down within the mounting base 120 to cause the movable end of the spring to produce periodic displacement changes, simulating the elastic deformation process of the spring in the working state. The second connector 300 can be a plate structure or a frame structure.

[0040] The drive assembly 400 is disposed on one side or top of the mounting base 120. The drive assembly 400 is disposed on the mounting base 120 and configured to drive the second connecting member 300 to move. The drive assembly 400 can be powered by a pneumatic cylinder, an electric push rod, a servo motor with a cam mechanism, etc., allowing for flexible selection of the drive method according to testing requirements. This drive assembly 400 can precisely control the motion frequency, stroke length, and force magnitude, thereby meeting the testing requirements of different types of springs.

[0041] Compared to traditional manual operation or simple fixture testing methods, the spring sheet testing fixture 10 provided in this application has advantages such as reasonable structure, convenient operation, and high testing efficiency. By setting the base 100 as the overall support structure, and combining the first connector 200 and the second connector 300 to fix the fixed end and movable end of the spring sheet respectively, the drive assembly 400 drives the second connector 300 to reciprocate, thereby simulating the elastic deformation state of the spring sheet during actual use, realizing automatic testing of the fatigue life of the spring sheet, effectively reducing labor intensity, improving testing frequency and continuity, more accurately reflecting the actual service life of the spring sheet, facilitating standardized testing procedures, and suitable for the large-scale testing needs of industrial sites.

[0042] In addition, the spring test fixture 10 has good adaptability and adjustability, and can adjust the driving parameters and connection positions according to the needs of springs of different specifications, which improves the versatility and practicality of the spring test fixture 10.

[0043] Please see Figure 1 , Figure 2 and Figure 3In some embodiments, the drive assembly 400 includes an eccentric shaft 410, a connecting rod 420, and a drive motor 430. The eccentric shaft 410 is composed of a first shaft 411 and a second shaft 412 connected to each other. The axes of the first shaft 411 and the second shaft 412 are parallel but not coincident, forming an eccentric structure. The first shaft 411 is rotatably mounted on the mounting base 120 via bearings, ensuring its stability and accuracy during operation.

[0044] One end of the connecting rod 420 is rotatably connected to the second shaft 412 of the eccentric shaft 410 via a hinge structure, while the other end is rotatably connected to the second connecting member 300. When the eccentric shaft 410 rotates, due to its eccentric structure, it causes the connecting rod 420 to swing, pushing the second connecting member 300 to reciprocate up and down along the height direction of the mounting base 120. This motion effectively simulates the pressing and releasing action of the spring in actual applications, thereby enabling continuous testing of its fatigue life.

[0045] The drive motor 430 is fixedly mounted on one side or top of the mounting base 120. Its output shaft 431 is connected to the first shaft 411 of the eccentric shaft 410, and is used to drive the eccentric shaft 410 to rotate. The drive motor 430 can be a servo motor, a stepper motor, or a general-purpose AC motor. A corresponding controller is configured according to the test requirements to achieve precise control of speed, direction, and start / stop. By adjusting the motor speed, the test frequency can be flexibly set to adapt to the test parameter requirements of different spring products.

[0046] Furthermore, a coupling or reduction mechanism can be installed between the drive motor 430 and the eccentric shaft 410 to achieve smooth power transmission and enhance torque output capability. A rotating support or spherical bearing is provided at the connection between the connecting rod 420 and the second connecting member 300 to reduce frictional resistance during movement and improve the smoothness and durability of the structure's operation.

[0047] Furthermore, limit switches or stroke sensors can be installed on the movement path of the second connector 300 to detect its movement limit position or displacement change, thereby realizing automatic monitoring and feedback control of the test stroke and improving the safety and reliability of the test process.

[0048] In some embodiments, the drive assembly 400 further includes a first deep groove ball bearing 440, the inner ring of which is fixedly connected to the first shaft 411, and the outer ring of which is fixedly connected to the mounting base 120. Thus, the first shaft 411 of the eccentric shaft 410 is rotatably connected to the mounting base 120 via the deep groove ball bearing. Deep groove ball bearings have good radial load-carrying capacity and low frictional resistance, effectively improving the stability and operating accuracy of the eccentric shaft 410 during rotation and reducing vibration and wear caused by eccentric motion.

[0049] Specifically, the inner ring of the first deep groove ball bearing 440 is fixedly sleeved on the first shaft 411 of the eccentric shaft 410 and rotates synchronously with the first shaft 411; its outer ring is fixedly installed in the bearing hole of the mounting base 120 and remains stationary, thereby limiting the rotational movement of the eccentric shaft 410 within a predetermined range.

[0050] The first deep groove ball bearing 440 not only provides a reliable rotational support for the eccentric shaft 410, but also effectively shares the radial load transmitted from the connecting rod 420 to the eccentric shaft 410, preventing the eccentric shaft 410 from tilting or jamming during operation, and improving the overall smoothness and responsiveness of the transmission system.

[0051] Preferably, the first deep groove ball bearing 440 is a standard part, which is convenient for procurement and replacement, and has high interchangeability, which helps to reduce manufacturing costs and maintenance difficulty. In the actual assembly process, a positioning end cover or lock nut can be set between the outer ring of the bearing and the mounting seat 120 to prevent axial displacement of the bearing during operation and ensure that the eccentric shaft 410 is always in the correct working position.

[0052] In some embodiments, the drive assembly 400 further includes a second deep groove ball bearing 450, the inner ring of which is fixedly connected to the second shaft 412, and the outer ring of which is fixedly connected to the connecting rod 420. That is, the second deep groove ball bearing 450 is mounted on the second shaft 412, and its outer ring is fixed to the connecting rod 420. Through this structural design, a stable and flexible rotational connection is formed between the eccentric shaft 410 and the connecting rod 420, allowing the connecting rod 420 to swing smoothly with the rotation of the eccentric shaft 410, thereby driving the second connecting member 300 to achieve stable up-and-down reciprocating motion.

[0053] When the eccentric shaft 410 rotates under the drive of the drive motor 430, the second deep groove ball bearing 450 rotates together with the second shaft 412 and maintains a relatively stationary contact with the connecting rod 420, allowing the connecting rod 420 to oscillate periodically around the bearing. This rotating connection method is not only compact and reliable in operation, but also significantly reduces frictional resistance during movement, ensuring that the connecting rod 420 moves smoothly and responds quickly during oscillation.

[0054] Preferably, the second deep groove ball bearing 450 is a standard size product, which facilitates procurement and replacement, and also improves the versatility and interchangeability of parts. In practical applications, a fastening structure, such as a gland, lock nut, or elastic retaining ring, can be installed between the connecting rod 420 and the bearing outer ring to prevent axial displacement of the bearing during operation and ensure that it is always in the correct working position.

[0055] In some embodiments, the drive assembly 400 further includes a first limiting member 460, with the second shaft 412 passing through the connecting rod 420. The first limiting member 460 and the connecting rod 420 cooperate to clamp the second deep groove ball bearing 450. Specifically, the first limiting member 460 and the connecting rod 420 clamp the outer ring of the second deep groove ball bearing 450. This structure effectively prevents the second deep groove ball bearing 450 from axially moving during operation, ensuring it remains in a set position, thereby maintaining the stability of the rotational connection between the eccentric shaft 410 and the connecting rod 420. This method of using the first limiting member 460 and the connecting rod 420 to jointly clamp the bearing not only improves the structural strength and operational accuracy of the overall transmission system but also enhances the reliability and durability of the drive assembly 400 under high-frequency reciprocating motion.

[0056] The first limiting component 460 is typically a limiting screw, limiting ring, pressure cap, or snap ring. When the second deep groove ball bearing 450 is subjected to periodic loads generated by the rotation of the eccentric shaft 410, it will not experience axial movement, ensuring that the rotational connection between the connecting rod 420 and the eccentric shaft 410 maintains good contact and motion accuracy. This structure not only improves the overall rigidity and operational smoothness of the drive assembly 400 but also helps extend the service life of the bearings and the entire transmission system.

[0057] Preferably, the first limiting member 460 adopts an adjustable structure, such as a limiting screw with a locking nut, so as to make fine adjustments according to the actual assembly situation, ensuring that the bearing can still rotate flexibly and not loosen under stress. In addition, a dust cover or sealing ring can also be provided between the connecting rod 420 and the bearing to prevent dust or impurities from entering the bearing and affecting its normal operation.

[0058] In some embodiments, the drive assembly 400 further includes a third deep groove ball bearing 470, the inner ring of which is fixedly connected to the second connecting member 300, and the outer ring of which is fixedly connected to the connecting rod 420. This arrangement of the third deep groove ball bearing 470 achieves a rotational connection between the two components. This structural design creates a low-friction, high-stability hinge relationship between the connecting rod 420 and the second connecting member 300, thereby ensuring that the drive assembly 400 can smoothly convert rotational motion into linear reciprocating motion of the second connecting member 300.

[0059] Specifically, the inner ring of the third deep groove ball bearing 470 is fixedly sleeved on the rotating shaft of the second connecting member 300 and moves synchronously with it; while the outer ring of the bearing is embedded and fixed inside one end of the connecting rod 420, forming a stable rotating support structure.

[0060] When the connecting rod 420 oscillates periodically under the drive of the eccentric shaft 410, the third deep groove ball bearing 470 effectively absorbs the lateral force generated by the motion, ensuring a flexible and stable rotational fit between the connecting rod 420 and the second connecting member 300. This guarantees that the second connecting member 300 makes smooth up-and-down reciprocating motion along the height direction of the mounting base 120. This structure not only improves the motion accuracy of the drive assembly 400 but also reduces jamming or abnormal vibration caused by uncoordinated motion.

[0061] Preferably, the third deep groove ball bearing 470 is a standard-sized product, which facilitates procurement and replacement, and also improves the versatility and interchangeability of parts. In practical applications, a keyway or set screw structure can be provided between the second connecting member 300 and the bearing inner ring to prevent relative sliding of the bearing; while a pressure cap, lock nut or elastic retaining ring or other limiting structure can be provided between the connecting rod 420 and the bearing outer ring to prevent axial displacement of the bearing during operation and ensure that it is always in the correct working position.

[0062] Furthermore, a dust cover or sealing structure can be provided at the connection between the connecting rod 420 and the second connecting member 300 to prevent external impurities from entering the bearing and affecting its normal operation, thereby further improving the durability and reliability of the overall structure.

[0063] In some embodiments, the drive assembly 400 further includes a connecting shaft 480 and a second limiting member 490. One end of the connecting shaft 480 passes through the connecting rod 420 and is connected to the inner ring of the third deep groove ball bearing 470, and the other end of the connecting shaft 480 is connected to the second connecting member 300. The second limiting member 490 is connected to the connecting rod 420 and cooperates with the connecting rod 420 to clamp the third deep groove ball bearing 470.

[0064] Specifically, one end of the connecting shaft 480 passes through the connecting rod 420 and is fixedly connected to the inner ring of the third deep groove ball bearing 470. The other end of the connecting shaft 480 extends to the outside and connects to the second connecting member 300, thereby converting the swinging motion of the connecting rod 420 into the linear reciprocating motion of the second connecting member 300 along the height direction of the mounting base 120. The connecting shaft 480 and the third deep groove ball bearing 470 can be securely connected by means of keyway fit, interference fit, or set screw to prevent relative rotation or slippage.

[0065] To prevent the third deep groove ball bearing 470 from shifting axially during operation, a second limiting member 490 is provided on one side of the connecting rod 420. This second limiting member 490 is typically a limiting screw, limiting ring, pressure cap, or snap ring, etc. One end of it is fixedly connected to the connecting rod 420, and the other end abuts against or clamps the outer ring end face of the third deep groove ball bearing 470, thereby firmly limiting the bearing in a set position.

[0066] Thus, the third deep groove ball bearing 470 will not experience axial movement when subjected to periodic loads transmitted from the connecting rod 420, ensuring that the rotational connection between the connecting rod 420 and the second connecting member 300 always maintains good contact and motion accuracy. This structure not only improves the overall rigidity and operational smoothness of the drive assembly 400, but also helps to extend the service life of the bearings and connecting components.

[0067] Preferably, the second limiting member 490 adopts an adjustable structure, such as a limiting screw with a locking nut, so as to make fine adjustments according to the actual assembly situation, ensuring that the bearing can still rotate flexibly and not loosen under stress. In addition, a sealing structure or dust cover can also be provided between the connecting shaft 480 and the connecting rod 420 to prevent dust or impurities from entering the bearing and affecting its normal operation.

[0068] In some embodiments, the connecting rod 420 is provided with a weight reduction hole 421, which extends through both opposite sides of the connecting rod 420 and extends along the length of the connecting rod 420.

[0069] The weight reduction hole 421 can significantly reduce the mass of the connecting rod 420 without sacrificing mechanical performance, thereby reducing its inertial force during the oscillation process. This not only helps to improve the action response speed of the drive assembly 400, but also reduces the dynamic load on the eccentric shaft 410, bearings and connecting parts, improving the smoothness of operation and service life of the entire drive system.

[0070] Furthermore, the edges of the weight-reducing holes 421 are chamfered or rounded to avoid stress concentration and thus prevent the risk of fracture due to insufficient local strength. At the same time, this design also helps improve the heat dissipation performance of the connecting rod 420, reducing material fatigue caused by temperature increases.

[0071] Preferably, the number of weight-reducing holes 421 can be set to one or more according to actual application requirements, and they are evenly distributed along the length of the connecting rod 420 to achieve better weight balance and mechanical performance matching. In addition, the position, size and number of weight-reducing holes 421 can be optimized by combining simulation methods such as finite element analysis to ensure that the connecting rod 420 has sufficient load-bearing capacity and fatigue resistance while meeting the lightweight target.

[0072] In some embodiments, the mounting base 120 has a first side and a second side facing away from each other, the first side facing the drive motor 430 and the second side facing the connecting rod 420, the first connector 200 and the second connector 300.

[0073] Specifically, the drive motor 430 is fixedly mounted on the first side of the mounting base 120 and transmits power to one end of the eccentric shaft 410 via the output shaft 431, thereby driving the entire drive assembly 400 to rotate. The other end of the eccentric shaft 410 extends into the interior of the mounting base 120 or to the other side, and forms a stable support with the mounting base 120 via a bearing structure. One end of the connecting rod 420 is connected to the second shaft 412 of the eccentric shaft 410, and the other end is connected to the second connecting member 300. This part of the structure is located on the second side of the mounting base 120 to facilitate cooperation with the first connecting member 200 to clamp the test piece and perform reciprocating pressing tests on it.

[0074] By placing the drive motor 430 and the test execution components (drive motor 430, second-side connecting rod 420, first connector 200, and second connector 300) on opposite sides of the mounting base 120, the power input and test output are spatially separated. This avoids mutual interference between components and improves the overall structure's neatness and safety. Furthermore, this layout facilitates heat dissipation, wiring, and the installation of protective covers, further enhancing the equipment's reliability and ease of maintenance.

[0075] In some embodiments, the spring test fixture 10 further includes a slider 510 and a slide rail 520, with the slider 510 and the slide rail 520 slidably engaged. Both the slider 510 and the slide rail 520 extend along the height direction of the mounting base 120. One of the mounting base 120 and the second connector 300 is provided with the slider 510, and the other of the mounting base 120 and the second connector 300 is provided with the slide rail 520.

[0076] Specifically, one of the slider 510 and the slide rail 520 is disposed on the second connector 300, and the other is disposed on the mounting base 120. For example, the slider 510 can be fixedly mounted on the side of the second connector 300, while the slide rail 520 is machined or mounted at the corresponding position on the mounting base 120; or conversely, the slider 510 can be disposed on the mounting base 120, while the slide rail 520 can be disposed on the second connector 300. Regardless of the arrangement, effective guidance of the second connector 300 can be achieved.

[0077] The mating structure between slider 510 and slide rail 520 can be selected from linear guide pairs, dovetail groove structures, ball bearing guides, or other forms of sliding guide structures according to actual needs. Preferably, a standard linear guide pair is used, which has advantages such as high rigidity, low friction, and long service life, and is suitable for applications with frequent starts and stops and high-speed reciprocating motion.

[0078] Furthermore, the installation position of the slide rail 520 should match the movement path of the second connector 300 and ensure that it is consistent with the transmission direction of the drive assembly 400 to avoid additional stress caused by installation errors. The slider 510 and the second connector 300 can be firmly connected by screws, welding, or an embedded structure to ensure that they do not loosen or fall off during operation.

[0079] In addition, a wear-resistant coating can be applied to the surface of the slide rail 520 as needed, or a lubrication structure can be integrated inside the slider 510 to reduce the coefficient of friction, reduce wear, and extend the service life of the guide system. At the same time, a dust cover or sealing strip can be added to the outside of the slide rail 520 to prevent dust, oil, and other impurities from entering the sliding contact surface and affecting the guiding performance.

[0080] In some embodiments, the spring test fixture 10 also includes a housing 600, the housing 600, the mounting base 120 and the base 110 cooperate to form a receiving space, and the drive motor 430 is located in the receiving space.

[0081] The housing 600 is typically made of a metal plate, engineering plastic, or other materials with sufficient strength and durability, and its shape and dimensions are adapted to the layout of the mounting base 120 and the base 110. One or more sides of the housing 600 may be provided with access doors or observation windows to facilitate routine maintenance, adjustment, or condition monitoring of internal components. In some embodiments, the housing 600 may also integrate heat dissipation holes, fans, or ventilation channels to ensure good heat dissipation for the drive motor 430 during long-term operation.

[0082] The drive motor 430 is housed within the housing space and extends through the housing 600 or mounting base 120 via an output shaft 431, connecting to the eccentric shaft 410 to transmit power. This layout not only helps protect the drive motor 430 from external dust, oil, or vibration, but also reduces noise generated during equipment operation, improving overall user comfort.

[0083] Furthermore, a sealing strip or elastic buffer pad is provided at the connection between the housing 600 and the mounting base 120 and the base 110 to enhance the sealing performance and vibration resistance of the structure, prevent external impurities from entering the interior of the housing space, and reduce vibration transmission during equipment operation.

[0084] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0085] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “” used herein may also mean including the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof.

[0086] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A spring fragment testing fixture, used for testing the lifespan of spring fragments, characterized in that, include: A base body, the base body including a base and a mounting base, the mounting base being disposed on the base; A first connector is disposed on the base and configured to connect to the fixed end of the spring piece; A second connector, movably disposed on the mounting base along the height direction of the mounting base, and configured to connect with the movable end of the spring; and A drive component is disposed on the mounting base and configured to drive the second connector to move.

2. The spring fragment testing fixture according to claim 1, characterized in that, The driving component includes: An eccentric shaft having a first shaft and a second shaft connected to each other, the axis of the first shaft being parallel to and not coincident with the axis of the second shaft, the first shaft being rotatably connected to the mounting base; A connecting rod, one end of which is rotatably connected to the second shaft, and the other end of which is rotatably connected to the second connecting member; A drive motor is mounted on the mounting base and has an output shaft connected to the first shaft to drive the eccentric shaft to rotate.

3. The spring fragment testing fixture according to claim 2, characterized in that, The drive assembly further includes a first deep groove ball bearing, the inner ring of which is fixedly connected to the first shaft, and the outer ring of which is fixedly connected to the mounting base.

4. The spring fragment testing fixture according to claim 2, characterized in that, The drive assembly also includes a second deep groove ball bearing, the inner ring of which is fixedly connected to the second shaft, and the outer ring of which is fixedly connected to the connecting rod.

5. The spring fragment testing fixture according to claim 4, characterized in that, The driving component also includes: A first limiting member and a second shaft passing through the connecting rod, wherein the first limiting member cooperates with the connecting rod to clamp the second deep groove ball bearing.

6. The spring fragment testing fixture according to claim 2, characterized in that, The drive assembly also includes a third deep groove ball bearing, the inner ring of which is fixedly connected to the second connecting member, and the outer ring of which is fixedly connected to the connecting rod.

7. The spring fragment testing fixture according to claim 6, characterized in that, The driving component also includes: A connecting shaft, one end of which passes through the connecting rod and is connected to the inner ring of the third deep groove ball bearing, and the other end of which is connected to the second connecting member; and The second limiting member is connected to the connecting rod and cooperates with the connecting rod to clamp the third deep groove ball bearing.

8. The spring fragment testing fixture according to claim 2, characterized in that, The connecting rod is provided with weight reduction holes, which penetrate through the opposite sides of the connecting rod and extend along the length of the connecting rod.

9. The spring fragment testing fixture according to claim 2, characterized in that, The mounting base has a first side and a second side facing away from each other, the first side facing the drive motor, and the second side facing the connecting rod, the first connector and the second connector.

10. The spring fragment testing fixture according to any one of claims 1 to 9, characterized in that, The spring test fixture also includes a slider and a slide rail, the slider and the slide rail are slidably engaged, and both the slider and the slide rail extend along the height direction of the mounting base; One of the mounting base and the second connector is provided with the slider, and the other of the mounting base and the second connector is provided with the slide rail.

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