Workpiece life testing apparatus

Abstract

The utility model discloses a workpiece service life test equipment, including the shell, the shell is separately provided with two and opposite independent equipment cabin and test cabin that distribute upside down in the inside, the equipment cabin one side inner wall is fixedly installed with hydraulic cylinder, the hydraulic cylinder piston rod one end extends to test cabin through the through -hole and is connected fixedly with the lifting plate, the lifting plate bottom surface and test cabin bottom inner wall all are provided with the multidirectional adjustment connecting assembly, and every multidirectional adjustment connecting assembly includes horizontal position adjusting mechanism and adjustable connecting mechanism, through setting multidirectional adjustment connecting assembly, can realize the flexible adjustment of the relative position of spring etc. two ends of cylindrical elastic workpiece, thereby simulating the compression extension fatigue test when the torsion of spring two ends misplacement occurs. This makes the test process closer to the stress state in the actual work of spring, effectively improves the accuracy of test result, and provides more reliable data support for workpiece design and quality evaluation.

Description

TECHNICAL FIELD

[0001] The utility model relates to work piece test field, specifically, relate to a work piece service life test equipment. BACKGROUND

[0002] In the modern industrial field, spring as the key part widely used in various mechanical devices, its fatigue performance is directly related to the running stability and service life of equipment. Precise fatigue test of spring and other cylindrical elastic workpieces is of great significance to ensure product quality and prevent potential safety hazards.

[0003] At present, when testing the fatigue of spring and other workpieces, the existing test methods have significant limitations. Most of the existing test equipment can only realize the fatigue test of spring and other cylindrical elastic workpieces in the vertical direction by repeated compression. This test method is too single and cannot fully simulate the complex working conditions that springs may face in actual use. In many practical application scenarios, the ends of the spring often appear to be misaligned and twisted, for example, in the suspension system of a car, a mechanical transmission device and some precision instruments, the spring may be subjected to torsional force while bearing axial compression. However, the existing test equipment cannot simulate this complex stress condition, making it difficult to accurately reflect the fatigue performance of the spring in the real working environment.

[0004] How to invent a workpiece service life test equipment to improve these problems has become a problem that needs to be solved by the technical personnel in the field. UTILITY MODEL CONTENT

[0005] In order to make up for the above shortcomings, the utility model provides a workpiece service life test equipment, which aims to improve the problem that the existing spring and other cylindrical elastic workpieces cannot simulate the state of the workpiece under the condition of twisting when performing fatigue test, resulting in the test data obtained being difficult to accurately reflect the fatigue performance of the workpiece in the real working environment.

[0006] This utility model is implemented as follows: A workpiece service life testing device includes a housing. Inside the housing, two equipment compartments and a test compartment are respectively arranged vertically and relatively independently. A hydraulic cylinder is fixedly installed on the inner wall of one side of the equipment compartment. One end of the piston rod of the hydraulic cylinder extends through a through hole into the test compartment and is fixedly connected to a lifting plate. Multi-directional adjustment connection components are provided on the bottom surface of the lifting plate and the bottom inner wall of the test compartment. Each multi-directional adjustment connection component includes a lateral position adjustment mechanism and an adjustable connection mechanism. The lateral position adjustment mechanism has four rectangularly distributed mounting plates and two displacement blocks. Each of the mounting plates is fixedly connected to the bottom surface of the corresponding lifting plate or the inner wall of the bottom of the test chamber. A sliding rod is fixedly connected between the opposite surfaces of two mounting plates on the same side, and a screw is rotatably connected between the opposite surfaces of the other two mounting plates. One of the displacement blocks is slidably mounted on the sliding rod, and the other displacement block is threadedly connected to the screw through a screw hole on its surface. A drive motor is fixedly mounted on one side surface of one of the mounting plates connected to the screw. One end of the output shaft of the drive motor is fixedly connected to the corresponding end of the screw through a through hole. The adjustable connection mechanism is fixedly connected to the two displacement blocks.

[0007] In a preferred embodiment of this utility model, one end of a first connecting plate is fixedly connected to one side of each of the two displacement blocks. A cylinder is fixedly installed between the other ends of the two first connecting plates. An annular plate is coaxially arranged below the cylinder. The upper surface of the annular plate is fixedly connected to the two first connecting plates on both sides by a second connecting plate. The annular plate is provided with a plurality of evenly distributed annular receiving grooves. An inner support plate is slidably connected in each receiving groove. A connecting frustum is fixedly connected to one end of the cylinder piston rod. A connecting rod is hinged between the connecting frustum and each inner support plate.

[0008] In a preferred embodiment of this utility model, each of the inner support plates has two corresponding hinge seats integrally provided on the side surface facing the connecting frustum and on the outer wall of the connecting frustum. The two ends of each connecting rod are rotatably connected to the two corresponding hinge seats.

[0009] In a preferred embodiment of this utility model, guide grooves are provided on the inner walls of both sides of each of the receiving grooves, and sliders are integrally provided on both sides of each inner support plate located at one end of the receiving groove, and each slider is slidably connected in the corresponding guide groove.

[0010] In a preferred embodiment of this utility model, the other end of each inner support plate is provided with a hook structure.

[0011] In a preferred embodiment of this utility model, the surface of the hook structure facing the outer side of the annular plate is all set as an arc surface.

[0012] In a preferred technical scheme of the utility model, the inner wall and the outer wall of each hook structure are provided with anti-skid protective rubber pads.

[0013] The utility model discloses the beneficial effect is: the utility model discloses the life test equipment of workpiece through above -mentioned design, when using, through setting multidirectional adjustment connecting assembly, can realize the flexible adjustment of the relative position of the two ends of spring etc. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to make the technical schemes of the embodiments of the utility model clearer, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the utility model, and therefore should not be regarded as the limitation to the scope, and for the ordinary skilled in the art, other related drawings can also be obtained according to these drawings without the creative labor.

[0015] Figure 1 It is the whole structure schematic perspective drawing provided by the embodiment of the utility model;

[0016] Figure 2 It is the whole structure schematic perspective drawing provided by the embodiment of the utility model;

[0017] Figure 3 It is the whole structure schematic perspective drawing provided by the embodiment of the utility model;

[0018] Figure 4 It is the whole structure schematic perspective drawing provided by the embodiment of the utility model;

[0019] Figure 5 It is the whole structure schematic perspective drawing provided by the embodiment of the utility model.

[0020] In the figure: 1 - shell; 2 - hydraulic cylinder; 3 - lifting plate; 4 - multidirectional adjusting connecting assembly; 401 - mounting plate; 402 - sliding rod; 403 - screw rod; 404 - driving motor; 405 - displacement block; 406 - first connecting plate; 407 - air cylinder; 408 - annular plate; 409 - second connecting plate; 410 - containing groove; 411 - inner support plate; 412 - connecting circular table; 413 - hinged seat; 414 - connecting rod; 415 - guide chute; 416 - sliding block; 417 - hook structure; 418 - circular arc surface. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figures 1 to 5 The present application provides a technical scheme: a workpiece service life test equipment, which comprises a shell 1, two equipment cabins and a test cabin which are arranged in the shell 1 and are distributed in an up-down manner and are independent of each other, a hydraulic cylinder 2 is fixedly installed on the inner wall of one side of the equipment cabin, the piston rod of the hydraulic cylinder 2 extends to the test cabin through a through hole and is fixedly connected with a lifting plate 3, a multidirectional adjusting connecting assembly 4 is arranged on the bottom surface of the lifting plate 3 and the inner wall of the bottom of the test cabin, each multidirectional adjusting connecting assembly 4 comprises a horizontal position adjusting mechanism and an adjustable connecting mechanism, the horizontal position adjusting mechanism comprises four mounting plates 401 which are distributed in a rectangular manner and two displacement blocks 405, each mounting plate 401 is fixedly connected to the bottom surface of the corresponding lifting plate 3 or the inner wall of the bottom of the test cabin, a sliding rod 402 is fixedly connected between the opposite side surfaces of the two mounting plates 401 which are located on the same side, and a screw rod 403 is rotatably connected between the opposite side surfaces of the other two mounting plates 401, one of the displacement blocks 405 is slidingly installed on the sliding rod 402, and the other displacement block 405 is threadedly connected to the screw rod 403 through a screw hole formed in the surface, a driving motor 404 is fixedly installed on the side surface of one of the mounting plates 401 which is connected with the screw rod 403, and the output shaft of the driving motor 404 is fixedly connected with the corresponding end of the screw rod 403 through a through hole, and the adjustable connecting mechanism is fixedly connected with the two displacement blocks 405.

[0023] It should be noted that the driving motor 404 has a positive and negative rotation function, so that the adjustable connecting mechanism can be driven to move linearly by changing the rotation direction of the screw rod 403, and by connecting the workpiece to the upper and lower two groups of adjustable connecting mechanisms and changing the relative position of the two groups of adjustable connecting mechanisms, the lifting movement of the lifting plate 3 can be simulated to simulate the fatigue test of the workpiece under the condition of compression and expansion and expansion and contraction movement.

[0024] Please refer to Figures 3 to 5 , two displacement blocks 405 are fixedly connected with one end of the first connecting plate 406 on the opposite side surface, and the other end of the two first connecting plates 406 is fixedly connected with the cylinder 407, and the cylinder 407 is coaxially arranged below the annular plate 408. The annular plate 408 is fixedly connected with the two first connecting plates 406 on the upper surface of the two sides through the second connecting plate 409, and a plurality of evenly distributed accommodating grooves 410 are formed on the upper surface of the annular plate 408. Each accommodating groove 410 is slidably connected with an inner support plate 411, and the piston rod of the cylinder 407 is fixedly connected with a connecting circular table 412. The connecting circular table 412 is hingedly connected with the connecting rod 414 between each inner support plate 411.

[0025] When the height of the connecting circular table 412 is adjusted by the cylinder 407, the distance between the plurality of inner support plates 411 can be synchronously driven by the pulling and pushing of the connecting rod 414, so that the inner support limiting can be realized according to the inner diameter of the annular or cylindrical workpiece, and the fast clamping can be realized. The radial expansion and contraction of the inner support plate 411 can adapt to annular workpieces (such as O-rings and springs) of different inner diameters. By adjusting the stroke of the cylinder 407, a wider range of workpiece sizes can be covered, and the frequency of replacing the clamp can be reduced. The multi-point contact of the inner support plate 411 with the workpiece simulates the uneven stress in the actual working condition, and the test result is closer to the real failure mode.

[0026] Further, two corresponding hinge seats 413 are integrally arranged on the side surface of each inner support plate 411 facing the connecting circular table 412 and on the outer wall of the connecting circular table 412, and the two ends of each connecting rod 414 are rotatably connected with the corresponding two hinge seats 413.

[0027] The two ends of the connecting rod 414 are connected with the hinge seat 413 by a pin shaft to ensure the freedom of movement. When the cylinder 407 is driven, the connecting rod 414 converts linear motion into radial displacement of the inner support plate. The hinge design avoids jamming and improves the smoothness of the action. The hinge structure can withstand high-frequency reciprocating motion and is suitable for long-term fatigue testing, reducing wear parts and reducing equipment maintenance requirements.

[0028] Further, a guide sliding groove 415 is formed on the inner wall of each accommodating groove 410, and a sliding block 416 is integrally arranged on the two side surfaces of one end of each inner support plate 411 in the accommodating groove 410, and each sliding block 416 is slidably connected in the corresponding guide sliding groove 415.

[0029] The slider 416 is embedded in the guide slot 415 to limit the inner support plate 411 to move only in the radial direction. This ensures the accurate movement track of the inner support plate 411 and avoids clamping failure caused by deviation. The influence of the deviation of the inner support plate 411 on the test results is eliminated, and the data repeatability is improved. The inner wall of the guide slot 415 is coated with a lubricating coating to reduce frictional resistance. The guide slot 415 disperses stress and avoids local wear.

[0030] Further, the other end of each inner support plate 411 is provided as a hook structure 417.

[0031] The end of each inner support plate 411 is provided as a hook structure 417 to facilitate hooking of annular elastic workpieces such as O-rings for fatigue testing in expansion and contraction. When the annular elastic workpieces are respectively hooked on a plurality of inner support plates 411 in the upper and lower groups of multidirectional adjustment connecting assemblies 4, and the driving motors 404 in the two groups of multidirectional adjustment connecting assemblies 4 are started to drive the two groups of adjustable connecting mechanisms to move relatively, the pulling and zooming fatigue test of the workpiece under the condition of distortion can also be simulated.

[0032] Further, the side surface of the hook structure 417 towards the outside of the annular plate 408 is provided as a circular arc surface 418.

[0033] By providing a circular arc surface 418 on the outer side surface of each hook structure 417, the inner wall of the workpiece of a spring or other cylindrical structure can be adapted, the connection stability is improved, and the situation that the workpiece is detached during the test to affect the test accuracy and efficiency is avoided.

[0034] Further, the inner wall of each hook structure 417 and the outer wall of the circular arc surface 418 are provided with anti-slip protective rubber pads.

[0035] Providing anti-slip protective rubber pads on the inner wall of the hook structure 417 and the outer wall of the annular plate 408 can not only protect the surface and inner wall of the workpiece from wear, but also increase the friction between the inner support plate 411 and the workpiece to improve the stability under the connected state.

[0036] Working principle: The hydraulic cylinder 2 of the equipment cabin can drive the lifting plate 3 to lift in the test cabin. The transverse position adjusting mechanism drives the screw rod 403 to rotate through the driving motor 404, so that the displacement block 405 moves along the slide rod 402 and the screw rod 403 to realize transverse position adjustment; the adjustable connecting mechanism adjusts the height of the connecting circular table 412 through the air cylinder 407, and uses the connecting rod 414 to pull and push the inner support plate to realize the clamping of the annular or cylindrical workpiece. The radial expansion and contraction of the inner support plate 411, the multi-point contact simulate the actual working condition, the end hook structure 417 of the inner support plate 411 facilitates hooking of annular elastic workpieces, and the expansion and contraction and the distortion pulling and zooming fatigue test are carried out. The design of each structure ensures efficient and accurate testing of different workpieces by the equipment.

[0037] It should be noted that the specific model of the hydraulic cylinder 2, the driving motor 404 and the air cylinder 407 needs to be determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0038] The power supply of the hydraulic cylinder 2, the driving motor 404 and the air cylinder 407 and its principle are clear to those skilled in the art, and will not be described in detail here.

[0039] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A workpiece service life testing apparatus characterized by comprising: The utility model provides a kind of test device, including shell, the shell is separately provided with two equipment cabin and test cabin in upper and lower distribution and opposite independence, hydraulic cylinder is fixedly installed on the inside wall of one side of equipment cabin, the piston rod one end of hydraulic cylinder extends to test cabin by through-hole and is fixedly connected with lifting plate, the bottom surface of lifting plate and the bottom inner wall of test cabin are all provided with multidirectional adjustment connecting assembly, each multidirectional adjustment connecting assembly includes transverse position adjusting mechanism and adjustable connecting mechanism, the four rectangular distribution mounting plates of transverse position adjusting mechanism and two displacement blocks, each mounting plate is fixedly connected on the bottom surface of corresponding lifting plate or the bottom inner wall of test cabin, two mounting plates located on the same side are fixedly connected with slide bar between opposite side surfaces, another two mounting plates are rotatably connected with screw on opposite side surfaces, one of displacement blocks is slidably installed on slide bar, another displacement block is threadedly connected on screw by the screw hole of surface, one side surface of one of mounting plate connected with screw is fixedly installed with drive motor, the output shaft one end of drive motor is fixedly connected with corresponding end of screw by through-hole, and adjustable connecting mechanism is fixedly connected with two displacement blocks.

2. The workpiece service life testing apparatus of claim 1, wherein: The opposite side surface of two displacement blocks is fixedly connected with the one end of first connecting plate respectively, the other end between two first connecting plates is fixedly installed with air cylinder, air cylinder coaxially is provided with annular plate below, the upper surface of annular plate is fixedly connected with two first connecting plates by second connecting plate respectively, a plurality of evenly distributed containing grooves in ring are formed in the annular plate, and inner support plate is slidably connected in each containing groove, and the one end of piston rod of air cylinder is fixedly connected with connecting circular table, and connecting link is hinged between connecting circular table and each inner support plate.

3. The workpiece service life testing apparatus of claim 2, wherein: The opposite side surface of two displacement blocks is fixedly connected with the one end of first connecting plate respectively, the other end between two first connecting plates is fixedly installed with air cylinder, air cylinder coaxially is provided with annular plate below, the upper surface of annular plate is fixedly connected with two first connecting plates by second connecting plate respectively, a plurality of evenly distributed containing grooves in ring are formed in the annular plate, and inner support plate is slidably connected in each containing groove, and the one end of piston rod of air cylinder is fixedly connected with connecting circular table, and connecting link is hinged between connecting circular table and each inner support plate.

4. The workpiece life testing apparatus of claim 2, wherein: The opposite side surface of two displacement blocks is fixedly connected with the one end of first connecting plate respectively, the other end between two first connecting plates is fixedly installed with air cylinder, air cylinder coaxially is provided with annular plate below, the upper surface of annular plate is fixedly connected with two first connecting plates by second connecting plate respectively, a plurality of evenly distributed containing grooves in ring are formed in the annular plate, and inner support plate is slidably connected in each containing groove, and the one end of piston rod of air cylinder is fixedly connected with connecting circular table, and connecting link is hinged between connecting circular table and each inner support plate.

5. The workpiece life testing apparatus of claim 2, wherein: The opposite side surface of two displacement blocks is fixedly connected with the one end of first connecting plate respectively, the other end between two first connecting plates is fixedly installed with air cylinder, air cylinder coaxially is provided with annular plate below, the upper surface of annular plate is fixedly connected with two first connecting plates by second connecting plate respectively, a plurality of evenly distributed containing grooves in ring are formed in the annular plate, and inner support plate is slidably connected in each containing groove, and the one end of piston rod of air cylinder is fixedly connected with connecting circular table, and connecting link is hinged between connecting circular table and each inner support plate.

6. The workpiece service life testing apparatus of claim 5, wherein: The opposite side surface of two displacement blocks is fixedly connected with the one end of first connecting plate respectively, the other end between two first connecting plates is fixedly installed with air cylinder, air cylinder coaxially is provided with annular plate below, the upper surface of annular plate is fixedly connected with two first connecting plates by second connecting plate respectively, a plurality of evenly distributed containing grooves in ring are formed in the annular plate, and inner support plate is slidably connected in each containing groove, and the one end of piston rod of air cylinder is fixedly connected with connecting circular table, and connecting link is hinged between connecting circular table and each inner support plate.

7. The workpiece service life testing apparatus of claim 6, wherein: ​

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