Multifunctional fatigue test equipment

Abstract

A multifunctional fatigue test device disclosed by the present invention comprises a test bench, a detection device, a pressurization device and a translation device, the detection device is used for supporting a product to be tested, the pressurization device is arranged above the detection device and is used for applying a downward pressure to the product to be tested, and the translation device is arranged at one side of the detection device. The translation device is used for clamping a to-be-detected product and driving the to-be-detected product to translate on the detection device; the detection device comprises a detection box, a sliding block, a supporting plate, two first pressure sensors and two first pressurization springs, the sliding block is arranged in the detection box in a sliding mode, the supporting plate is connected with the sliding block and used for supporting a to-be-detected product, and the two first pressure sensors are arranged on the two opposite sides of the detection box in the driving direction of the translation device correspondingly; the two first pressurizing springs abut against the two first pressure sensors in a one-to-one correspondence mode and are arranged on the two opposite sides of the sliding block respectively. The multifunctional fatigue test equipment provided by the invention not only can realize the fatigue life test of a product, but also can test the friction coefficient of the product.

Description

Technical Field

[0001] The invention relates to the technical field of material fatigue testing, in particular to a multifunctional fatigue testing device. Background Art

[0002] With the progress of society, product material standards in various industries are gradually improved. Plastic films, sheets, rubber, paper, cardboard, woven bags, fabrics, metal composite belts for communication cables and optical cables, conveyor belts, wood, coatings, wipers, shoe materials, tires and other materials all need to test the static friction coefficient and / or dynamic friction coefficient during sliding, as well as the impact of multiple reciprocating sliding friction on service life.

[0003] In this regard, the existing technology generally uses friction coefficient testing equipment to perform friction coefficient testing operations, and then uses fatigue testing equipment to perform multiple reciprocating sliding fatigue life tests. Not only is the testing efficiency low, but it also requires providing multiple groups of products to be tested for different testing processes, which is easy to cause waste, high testing costs and long time consumption. In addition, the testing conditions of the existing testing equipment are single and cannot accurately simulate the actual use conditions of the product, resulting in reduced accuracy of the test data. Summary of the invention

[0004] The invention provides a multifunctional fatigue test device to solve the technical problems that the existing test device cannot simultaneously perform fatigue test and detect the friction coefficient of the product and cannot simulate the actual use conditions.

[0005] According to one aspect of the present invention, there is provided a multifunctional fatigue testing device, comprising a test bench, and a detection device, a pressure device and a translation device respectively arranged on the test bench, wherein the detection device is used to support a product to be tested, the pressure device is arranged above the detection device and is used to apply downward pressure to the product to be tested, the translation device is arranged on one side of the detection device, and is used to clamp the product to be tested and drive the product to be tested to translate on the detection device;

[0006] The detection device includes a detection box, a slider, a support plate, two first pressure sensors and two first pressurizing springs. The slider is slidably arranged in the detection box along the driving direction of the translation device. The support plate is connected to the slider and is used to support the product to be tested. The two first pressure sensors are arranged on opposite sides of the detection box along the driving direction of the translation device. The two first pressurizing springs are respectively abutted against the two first pressure sensors and are respectively arranged on opposite sides of the slider. The support plate is used to drive the movement through the friction force of the product to be tested when the product to be tested is translated, thereby driving the slider to squeeze the first pressurizing spring and detect the pressure applied to the first pressurizing spring in real time through the corresponding first pressure sensor.

[0007] Preferably, the detection device also includes a guide rod extending along the driving direction of the translation device, the slider is passed through the guide rod and is used to guide and slide along the guide rod, and two first pressure springs are respectively mounted on the opposite ends of the guide rod and are limited and fixed by the guide rod.

[0008] Preferably, the pressurizing device comprises a bracket and a lifting mechanism, and a pressurizing rod, a second pressurizing spring, a second pressure sensor and a pressurizing plate connected in sequence from top to bottom;

[0009] The bracket is arranged on the test bench, the lifting mechanism is installed on the bracket and is erected above the detection device through the bracket, the lifting mechanism is connected to the pressure rod and is used to drive the pressure rod to move up and down, thereby squeezing the second pressure spring and detecting the pressure applied to the second pressure spring in real time through the second pressure sensor, and the pressure plate is used to abut against the top surface of the product to be tested and apply downward pressure to the product to be tested.

[0010] Preferably, the pressurizing device further comprises a movable cylinder connected to the pressurizing plate, the movable cylinder is sleeved on the outer circumference of the pressurizing rod and is used for guiding and sliding along the pressurizing rod, and the second pressurizing spring is arranged in the movable cylinder.

[0011] Preferably, the pressurizing device also includes two guide rails which are arranged on opposite sides of the detection device and extend along the driving direction of the translation device. The bracket includes two legs which are connected to the two guide rails in a one-to-one manner, and a crossbeam which connects the two legs into a whole and straddles the top of the detection device. The lifting mechanism is installed on the crossbeam. The legs are used to guide the movement along the guide rails and adjust the horizontal position of the lifting mechanism. The legs are provided with locking components for locking and fixing relative to the guide rails.

[0012] Preferably, the pressurizing device further comprises two limit assemblies which are both arranged on the bottom surface of the pressurizing plate and are respectively used to abut against opposite sides of the product to be tested;

[0013] The limit assembly includes a fixed plate, a movable pin, a limit plate and a limit spring, the fixed plate is connected to the bottom surface of the pressure plate, the movable pin is movably arranged on the fixed plate in the direction toward the product to be tested, the limit plate is arranged on the first end of the movable pin and is used to abut the product to be tested, the second end of the movable pin passes through the side of the fixed plate away from the limit plate and is provided with a driving handle, the limit spring is pressed between the fixed plate and the limit plate and is sleeved on the movable pin.

[0014] Preferably, the lifting mechanism comprises a lifting seat, a lifting motor disposed on the lifting seat, a screw connected to the output shaft of the lifting motor, and a lifting block sleeved on the screw and threadedly connected to the screw, the lifting seat is provided with a guide slot adapted to the lifting block, the lifting block is embedded in the guide slot and is used to move up and down along the guide slot under the drive of the lifting motor;

[0015] The lifting mechanisms are provided with two at intervals, and the pressurizing device further comprises a connecting piece which is provided between the two lifting mechanisms and connects the lifting blocks on the two lifting mechanisms into a whole, and the pressurizing rod is connected to the connecting piece.

[0016] Preferably, the translation device comprises a translation driving mechanism disposed on the test bench, a clamping mechanism connected to the translation driving mechanism, and a tension detection mechanism disposed between the translation driving mechanism and the clamping mechanism;

[0017] The tension detection mechanism includes a force transmission member, a movable member, a movable plate, a third pressure sensor and a third pressure spring. The force transmission member is connected to the translation drive mechanism, and the movable member is connected to the clamping mechanism. The force transmission member is provided with a movable groove extending along the driving direction of the translation drive mechanism. The movable plate can be movably arranged in the movable groove and connected to the movable member. The third pressure sensor is arranged on a side of the movable plate facing the clamping mechanism. The first end of the third pressure spring abuts against the third pressure sensor, and the second end of the third pressure spring abuts against the inner wall of the movable groove facing the translation drive mechanism.

[0018] Preferably, the translation drive mechanism includes a vertical pole erected on the test bench, and a first linear drive component and a telescopic scissors frame vertically spaced apart on the vertical pole, the first end of the telescopic scissors frame being connected to the vertical pole, the second end of the telescopic scissors frame being horizontally extended in a direction toward the detection device and connected to the force transmission member, the first linear drive component being connected to one of the hinge nodes at the middle section of the telescopic scissors frame and being used to drive the telescopic movement of the telescopic scissors frame.

[0019] Preferably, the clamping mechanism includes a connecting plate connected to the movable part and two clamping jaws hinged to opposite sides of the connecting plate, as well as a second linear drive component arranged on the middle part of the connecting plate and two connecting rods hinged to the second linear drive component, one end of the two connecting rods away from the second linear drive component is hinged to the two clamping jaws one by one, and the second linear drive component is used to synchronously drive the two connecting rods to move and drive the two clamping jaws to approach or move away from each other.

[0020] The present invention has the following beneficial effects:

[0021] The multifunctional fatigue testing equipment provided by the present invention supports the product to be tested through the detection device, and applies downward pressure to the product to be tested through the pressure device, which can accurately simulate the pressure size that the product to be tested is subjected to during actual use, and simulate actual use conditions. At this time, the product to be tested is clamped by the translation device and driven to move back and forth in the horizontal direction in the space between the detection device and the pressure device, which can not only realize fatigue life tests of multiple reciprocating sliding, but also can utilize the support plate, slider and first pressure spring on the detection device to convert the friction force of the product to be tested into an extrusion force in the horizontal direction and apply it to the first pressure sensor, so that the size of the friction force can be recorded in real time, and the friction coefficient can be calculated by the relevant formula. The detection structure is simple, efficient and accurate, and the friction coefficient of the product to be tested along different sliding directions is detected by two first pressure sensors respectively, which can meet more detection needs and detect multiple indicators at one time. It can also calibrate each other through the detection results of the two first pressure sensors to further improve the detection accuracy.

[0022] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of a multifunctional fatigue testing device provided by an embodiment of the present invention;

[0025] Figure 2 for Figure 1 An exploded view of the detection device in the multifunctional fatigue testing equipment shown;

[0026] Figure 3 for Figure 1 A partial cross-sectional view of a pressurizing device in the multifunctional fatigue testing equipment shown;

[0027] Figure 4 for Figure 3 A perspective view of a lifting mechanism in the pressurizing device shown;

[0028] Figure 5 for Figure 1 A perspective view of a translation drive mechanism in the translation device shown;

[0029] Figure 6 for Figure 1 A partial cross-sectional view of a tension detection mechanism in the translation device shown;

[0030] Figure 7 for Figure 1 A three-dimensional view of the clamping mechanism in the translation device shown.

[0031] Legend:

[0032] 1000. Multifunctional fatigue testing equipment;

[0033] 1. Test bench;

[0034] 2. Detection device; 21. Detection box; 211. Accommodation chamber; 22. Slider; 23. Support plate; 24. First pressure sensor; 25. First pressure spring; 26. Guide rod; 27. Display screen; 28. Adjustment button;

[0035] 3. Pressurizing device; 31. Bracket; 311. Leg; 312. Crossbeam; 32. Lifting mechanism; 321. Lifting seat; 3211. Guide slide; 322. Lifting motor; 323. Screw rod; 324. Lifting block; 325. Second mounting plate; 320. Connector; 33. Pressurizing rod; 34. Second pressurizing spring; 35. Second pressure sensor; 351. Pressure display panel; 36. Pressurizing plate; 37. Movable cylinder; 38. Guide rail; 381. First mounting plate; 39. Limiting assembly; 391. Fixed plate; 392. Movable pin; 393. Limiting plate; 394. Limiting spring;

[0036] 4. Translation device; 41. Translation drive mechanism; 411. Vertical pole; 412. First linear drive assembly; 413. Telescopic scissors frame; 42. Tension detection mechanism; 421. Force transmission member; 4211. Movable groove; 422. Movable member; 4221. Pushing part; 423. Movable plate; 424. Third pressure sensor; 425. Third pressure spring; 426. Tension display panel; 43. Clamping mechanism; 431. Connecting plate; 432. Clamping claw; 433. Second linear drive assembly; 434. Connecting rod; 435. Flexible rubber pad. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0038] Those skilled in the art will understand that, unless expressly stated, the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, parts and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, parts, components and / or combinations thereof. It should be understood that when we refer to a component as being "connected" to another component, it can be directly connected to the other component or connected through an intermediate component. The term "and / or" used here includes all or any unit and all combinations of one or more associated listed items. The terms "first" and "second" and the like in the specification and claims of the present invention are used to distinguish different objects, rather than to describe a specific order.

[0039] Figures 1 to 7 The multifunctional fatigue testing equipment provided by an embodiment of the present invention is collectively shown, which is used to perform fatigue life tests of the product to be tested with multiple reciprocating sliding movements, and detect the friction coefficient of the product to be tested in real time while performing the fatigue life test, and can accurately simulate the actual use conditions of the product to be tested, thereby improving the detection efficiency and detection accuracy.

[0040] like Figure 1 As shown, the multifunctional fatigue testing equipment 1000 includes a test bench 1, a detection device 2, a pressurizing device 3 and a translation device 4. The detection device 2, the pressurizing device 3 and the translation device 4 are respectively arranged on the test bench 1, the detection device 2 is used to support the bottom surface of the product to be tested, the pressurizing device 3 is mounted above the detection device 2, the pressurizing device 3 is used to abut against the top surface of the product to be tested and apply downward pressure to the product to be tested from top to bottom, the translation device 4 is arranged on one side of the detection device 2, and the translation device 4 is used to clamp the product to be tested and drive the product to be tested to translate on the detection device 2.

[0041] Please combine Figure 2 Preferably, the detection device 2 includes a detection box 21, a slider 22, a support plate 23, two first pressure sensors 24 and two first pressurizing springs 25. A receiving cavity 211 is provided in the detection box 21. The slider 22 is slidably arranged in the receiving cavity 211 along the driving direction of the translation device 4. The support plate 23 is connected to the top surface of the slider 22 and is used to support the product to be tested. The two first pressure sensors 24 are arranged on opposite sides of the detection box 21 along the driving direction of the translation device 4. The two first pressurizing springs 25 are respectively in contact with the two first pressure sensors 24 and are arranged on opposite sides of the slider 22.

[0042] Specifically, two first pressure sensors 24 are arranged opposite to each other, and the first pressure sensors 24 are installed on the inner wall of the accommodating cavity 211. The first pressure spring 25 is horizontally pressed between the first pressure sensor 24 and the slider 22, and the two first pressure springs 25 respectively abut against the opposite sides of the slider 22. The support plate 23 is used to drive the movement through the friction force of the product to be tested during the translation of the product to be tested, so that the slider 22 is driven by the support plate 23 to squeeze the first pressure spring 25 and the corresponding first pressure sensor 24 is used to detect the pressure applied to the first pressure spring 25 in real time.

[0043] The multifunctional fatigue testing equipment 1000 supports the product to be tested through the detection device 2, and applies downward pressure to the product to be tested through the pressurizing device 3, which can accurately simulate the pressure magnitude of the product to be tested in actual use and simulate actual use conditions. At this time, the product to be tested is clamped by the translation device 4 and driven to move back and forth in the horizontal direction in the space between the detection device 2 and the pressurizing device 3, which can not only realize fatigue life tests of multiple reciprocating sliding, but also can use the support plate 23, the slider 22 and the first pressurizing spring 25 on the detection device 2 to convert the friction force of the product to be tested into an extrusion force in the horizontal direction and apply it to the first pressure sensor 24, so that the magnitude of the friction force can be recorded in real time, and the friction coefficient can be calculated by the relevant formula. The detection structure is simple, efficient and accurate, and the friction coefficient of the product to be tested along different sliding directions is detected by two first pressure sensors 24 respectively, which can meet more detection needs and detect multiple indicators at one time. It can also calibrate each other through the detection results of the two first pressure sensors 24 to further improve the detection accuracy.

[0044] Secondly, when the slider 22 is driven to slide, different extrusion pressures are adapted by different compression amounts of the first pressure spring 25, effectively preventing the extrusion force of the slider 22 from being directly and rigidly transmitted to the first pressure sensor 24, causing the first pressure sensor 24 to be squeezed and deformed, thereby ensuring the stable use of the first pressure sensor 24, and the elastic force of the first pressure spring 25 can also drive the slider 22 to automatically reset, thereby facilitating the next round of detection operations.

[0045] Preferably, the detection device 2 also includes a guide rod 26, which is arranged in the accommodating cavity 211 and extends along the driving direction of the translation device 4. The slider 22 is provided with a guide through hole that is compatible with the guide rod 26. The slider 22 is passed through the guide through hole on the guide rod 26 and is used to guide and slide along the guide rod 26. Two first pressure springs 25 are respectively mounted on the opposite ends of the guide rod 26 and are limited and fixed by the guide rod 26.

[0046] The detection device 2 limits the sliding direction of the slider 22 through the guide rod 26, ensuring that the sliding direction of the slider 22 is parallel to the driving direction of the translation device 4, and can accurately transmit the friction force to the corresponding first pressure sensor 24, avoiding the displacement of the slider 22 from being misplaced and causing the problem of jamming. Secondly, the two first pressure springs 25 can be radially limited by the guide rod 26 respectively, and multiple parts can be guided and limited by one guide rod 26 at the same time, that is, the guide rod 26 has multiple uses at the same time, with a simple and efficient structure, more reasonable and compact, and can ensure that the axial direction of the first pressure spring 25 is set along the sliding direction of the slider 22, so that the extrusion force effect is better and the detection data is more accurate.

[0047] Furthermore, a guide groove extending along the driving direction of the translation device 4 is provided in the detection box 21, and the slider 22 is embedded in the guide groove and is used to slide along the guide groove. The sliding direction of the slider 22 is limited by the guide groove, which can further improve the sliding accuracy and stability of the slider 22.

[0048] Furthermore, the slider 22, the first pressure sensor 24 and the first pressure spring 25 are all placed in the receiving chamber 211. The top of the receiving chamber 211 is provided with an opening, and the area of ​​the support plate 23 is larger than the area of ​​the opening and is covered on the opening. While the support plate 23 is connected to the slider 22 through the opening, the receiving chamber 211 can also be shielded and closed by the support plate 23, thereby shielding and protecting the components inside the receiving chamber 211, and preventing foreign matter from entering the relevant transmission structure to cause jamming and affect the detection accuracy.

[0049] Furthermore, a control circuit board is also provided in the detection box 21, and a display screen 27 and an adjustment button 28 are installed on the outer wall of the detection box 21. The first pressure sensor 24, the display screen 27 and the adjustment button 28 are all connected to the control circuit board. The control circuit board is used to convert the detection result of the first pressure sensor 24 into relevant data and transmit it to the display screen 27 for display, so as to facilitate the operator to observe and record the test data. The adjustment button 28 is used to adjust relevant parameters, for example, according to the material, size, friction type (static friction, sliding friction or rolling friction) of different products to be tested, the corresponding friction coefficient calculation formula is adjusted, so that the control circuit board can accurately convert the detection result of the first pressure sensor 24 into the corresponding friction coefficient.

[0050] like Figure 3 As shown, the pressurizing device 3 includes a bracket 31 and a lifting mechanism 32, as well as a pressurizing rod 33, a second pressurizing spring 34, a second pressure sensor 35 and a pressurizing plate 36 which are sequentially connected from top to bottom.

[0051] Specifically, the bracket 31 is straddled on the test bench 1, a first end of the bracket 31 is supported on one side of the detection device 2, a second end of the bracket 31 crosses over the detection device 2 and is supported on the other side of the detection device 2, the lifting mechanism 32 is installed on the bracket 31 and is erected above the detection device 2 through the bracket 31, the lifting mechanism 32 is connected to the pressure rod 33 and is used to drive the pressure rod 33 to move up and down, the second pressure spring 34, the second pressure sensor 35 and the pressure plate 36 are sequentially connected and arranged at the bottom end of the pressure rod 33 in a top-to-bottom direction, so that the pressure rod 33 can be driven to descend by the lifting mechanism 32 to squeeze the second pressure spring 34 and the pressure on the second pressure spring 34 can be detected in real time by the second pressure sensor 35, and the pressure plate 36 is used to abut against the top surface of the product to be tested and apply downward pressure to the product to be tested during the descent of the pressure rod 33.

[0052] The pressurizing device 3 drives the pressurizing rod 33 to move up and down through the lifting mechanism 32, and can use the cooperation of the pressurizing rod 33, the second pressurizing spring 34, the second pressure sensor 35 and the pressurizing plate 36 to sequentially transmit downward pressure. While the pressurizing plate 36 presses down the product to be tested, the second pressure sensor 35 between the second pressurizing spring 34 and the pressurizing plate 36 can also detect the size of the downward pressure in real time, so as to facilitate and flexibly adjust the downward pressure, accurately simulate the actual use conditions of the product to be tested, and make the test results more accurate and reliable. Secondly, different downward pressures are adapted by different compression amounts of the second pressurizing spring 34, so as to avoid the downward pressure of the pressurizing rod 33 being directly and rigidly transmitted to the second pressure sensor 35, which causes the second pressure sensor 35 to be squeezed and deformed, and ensure the stable use of the second pressure sensor 35. When the pressurizing plate 36 presses down the product to be tested, the second pressurizing spring 34 can also be used to play an elastic buffering role to protect the product to be tested.

[0053] Furthermore, the pressurizing device 3 also includes a pressure display panel 351 electrically connected to the second pressure sensor 35. The pressure display panel 351 can be specifically installed on the pressurizing plate 36, the bracket 31 or the lifting mechanism 32. The pressure display panel 351 is used to display the detection pressure of the second pressure sensor 35 in real time, so as to facilitate the observation of the magnitude of the downward pressure.

[0054] Preferably, the pressurizing device 3 further comprises a movable cylinder 37 disposed on a surface of the pressurizing plate 36 facing the pressurizing rod 33, the movable cylinder 37 being fixedly connected to the pressurizing plate 36 and / or the second pressure sensor 35, the movable cylinder 37 being sleeved on the outer periphery of the pressurizing rod 33 and used for guiding and sliding along the pressurizing rod 33, and the second pressurizing spring 34 being disposed in the movable cylinder 37. The pressurizing plate 36 is limited by the guiding cooperation between the movable cylinder 37 and the pressurizing rod 33, so as to ensure that the pressurizing plate 36 moves up and down in the vertical direction, and avoid the pressurizing plate 36 from tilting, thereby ensuring the accurate transmission of the downward pressure, and at the same time, the second pressurizing spring 34 can be radially limited by the movable cylinder 37, so as to ensure that the axial direction of the second pressurizing spring 34 is arranged in the vertical direction, so that the extrusion force effect is better and the detection data is more accurate, and the second pressurizing spring 34 and the second pressure sensor 35 can be shielded and protected by the movable cylinder 37.

[0055] Preferably, the pressurizing device 3 also includes two guide rails 38 which are arranged on opposite sides of the detection device 2 and extend along the driving direction of the translation device 4. The bracket 31 includes two legs 311 which are connected to the two guide rails 38 in a one-to-one correspondence, and a beam 312 which connects the two legs 311 into a whole and straddles the top of the detection device 2. The lifting mechanism 32 is installed on the beam 312. The legs 311 are used to guide the movement along the guide rails 38 and adjust the horizontal position of the lifting mechanism 32. The legs 311 are provided with a locking assembly (not shown in the figure, the same below) for locking and fixing relative to the guide rails 38.

[0056] The pressurizing device 3 can flexibly adjust the horizontal position of the lifting mechanism 32 through the sliding cooperation between the legs 311 and the guide rails 38, thereby adjusting the horizontal position of the pressurizing rod 33 and driving the pressurizing plate 36 to move to different pressurizing positions to adapt to the different pressurizing position requirements of different products to be tested. After the position of the pressurizing plate 36 is adjusted to the right position, the locking assembly can be used to lock and fix the legs 311 relative to the guide rails 38 to prevent the pressurizing plate 36 from being displaced during the test.

[0057] Furthermore, the locking assembly includes a clamp connected to the leg 311 and sleeved on the guide rail 38. The leg 311 can be locked and fixed by tightening the guide rail 38 with the clamp. The locking structure is simple and efficient, and is convenient for quick contact locking. In other embodiments, a limiting screw hole connected to the guide rail 38 can be opened on the leg 311. The locking assembly includes a top screw that is inserted into the limiting screw hole and threadedly connected to the limiting screw hole. The guide rail 38 is tightened by the top screw, and the locking and fixing of the leg 311 can also be achieved.

[0058] In this embodiment, the bracket 31 uses two legs 311 and the crossbeam 312 to form a gantry structure similar to a door frame, which can be arranged across the top of the detection device 2, and has good rigidity and strong stability, but this cannot be regarded as a limitation on the specific structure of the bracket 31. In other embodiments, the bracket 31 can also be provided with the legs 311 only on one side of the detection device 2, the legs 311 are arranged vertically, and the crossbeam 312 is arranged horizontally on the upper part of the legs 311, and the legs 311 and the crossbeam 312 form an inverted "L"-shaped structure, and the lifting mechanism 32 and related downward pressing components can also be installed on the crossbeam 312, and an unobstructed open structure can also be formed on the other side of the detection device 2, which is more convenient for test operations.

[0059] Furthermore, a first mounting plate 381 is provided on the guide rail 38, and the first mounting plate 381 is connected to the test bench 1 and sets the guide rail 38 on the test bench 1. The first mounting plate 381 is used to abut the support leg 311 when the support leg 311 moves to the maximum stroke along the guide rail 38, so as to limit the movement stroke of the support leg 311 along the guide rail 38, thereby limiting the bracket 31 within a preset range of movement and preventing the bracket 31 from detaching from the guide rail 38.

[0060] Preferably, the pressurizing device 3 also includes two limit assemblies 39, which are both arranged on the bottom surface of the pressurizing plate 36 and are respectively used to abut against the opposite sides of the product to be tested, so that the product to be tested is clamped by the two limit assemblies 39 and the product to be tested is limited on the central axis of the pressurizing plate 36.

[0061] Specifically, the limiting assembly 39 includes a fixed plate 391, a movable pin 392, a limiting plate 393 and a limiting spring 394, the fixed plate 391 is connected to the bottom surface of the pressure plate 36, the fixed plate 391 is provided with a through hole in the direction toward the product to be tested, the movable pin 392 can be movably penetrated through the through hole, the first end of the movable pin 392 is located on the side of the fixed plate 391 facing the product to be tested, the second end of the movable pin 392 is located on the side of the fixed plate 391 away from the product to be tested, and the limiting spring 394 is provided on the fixed plate 391. The plate 393 is arranged at the first end of the movable pin 392 and is used to abut against the product to be tested. The second end of the movable pin 392 is provided with a driving handle for pulling the movable pin 392 in a direction close to or away from the product to be tested. The limit spring 394 is pressed between the fixed plate 391 and the limit plate 393 and is sleeved on the movable pin 392. The limit spring 394 is used to apply an elastic force to the limit plate 393 in a direction toward the product to be tested, thereby driving the limit plate 393 to elastically press against the product to be tested.

[0062] The method of using the limit assembly 39 is as follows: before clamping the product to be tested, first pull the movable pin 392 outward and drive the limit plate 393 to move outward to expand the clamping space, and then put the product to be tested into the clamping space. At this time, release the movable pin 392 to drive the limit plate 393 to automatically press against the product to be tested under the elastic force of the limit spring 394, and the product to be tested is limited on the central axis of the pressure plate 36 by the two limit assemblies 39. The operation is convenient and quick, and the clamping effect is good.

[0063] Furthermore, a plurality of through holes are arranged at intervals along the driving direction of the translation device 4, and a plurality of the movable pins 392 and the limit springs 394 are arranged one by one corresponding to the through holes. The limit plate 393 is jointly pressed by the plurality of limit springs 394, so that the limit plate 393 can have a certain clamping force at different positions along the driving direction of the translation device 4, which can not only adapt to clamping a wider product to be tested, but also keep the product to be tested limited on the central axis of the pressure plate 36 during the translation of the product to be tested, thereby ensuring stable testing.

[0064] like Figure 4 As shown, the lifting mechanism 32 includes a lifting seat 321, a lifting motor 322, a screw rod 323 and a lifting block 324. The lifting seat 321 is installed on the bracket 31 and is provided with a guide slot 3211 extending vertically. The lifting motor 322 is installed on the lifting seat 321. The screw rod 323 is connected to the output shaft of the lifting motor 322 and is vertically penetrated in the guide slot 3211. The lifting block 324 is sleeved on the screw rod 323 and is threadedly connected to the screw rod 323. The shape of the lifting block 324 is adapted to the guide slot 3211 and is slidably embedded in the guide slot 3211. The lifting motor 322 is used to drive the screw rod 323 to rotate and drive the lifting block 324 to move up and down along the guide slot 3211 through threaded cooperation. The lifting block 324 is connected to the pressure rod 33, so that the pressure rod 33 is driven to move up and down through the lifting block 324. The lifting mechanism 32 forms a screw-nut transmission assembly through the screw 323 and the lifting block 324, which has high transmission accuracy, high efficiency, and strong stability. It can achieve high-torque micro-feed transmission through a large transmission ratio, which is convenient for accurate adjustment of the size of the downward force.

[0065] Preferably, two lifting mechanisms 32 are provided at intervals, and the pressurizing device 2 further includes a connecting piece 320 provided between the two lifting mechanisms 32, and the two ends of the connecting piece 320 are connected to the lifting blocks 324 on the two lifting mechanisms 32 in a one-to-one correspondence, so that the two upgrading blocks 324 are connected as a whole, and the pressurizing rod 33 is connected to the connecting piece 324. The pressurizing device 2 is enclosed by the two lifting mechanisms 32 and the connecting piece 320 to form a gantry structure similar to a door frame, which is not only more stable, but also can drive the pressurizing rod 33 to move up and down through the two lifting mechanisms 32, effectively improving the downward pressure strength and accuracy.

[0066] Furthermore, the lifting mechanism 32 further includes a second mounting plate 325, a mounting hole is provided at the top of the guide slot 3211, the screw rod 323 and the lifting block 324 are both inserted into the guide slot 3211 along the mounting hole, the second mounting plate 325 is detachably arranged on the mounting hole to block the mounting hole, the lifting motor 322 is mounted on the second mounting plate 325, and the output shaft of the lifting motor 322 is connected to the screw rod 323 after passing through the second mounting plate 325. While the lifting mechanism 32 fixes the lifting motor 322 through the second mounting plate 325, it can also block the mounting hole and realize the limit fixation of the screw rod 323 and the lifting block 324.

[0067] It should be understood that in other embodiments, the lifting mechanism 32 may be provided with only one, or with more than two, and the lifting blocks 324 on a single or multiple lifting mechanisms 32 may be connected to the pressure rod 33 through the connecting member 324, and the lifting and lowering movement of the lifting blocks 324 may drive the pressure rod 33 to move upward and downward, thereby pressing down the product to be tested. In addition, the lifting mechanism 32 may also directly adopt an electric telescopic rod, a hydraulic rod and / or a gas rod.

[0068] like Figure 1 As shown, the translation device 4 includes a translation drive mechanism 41, a tension detection mechanism 42 and a clamping mechanism 43 which are connected in sequence. The translation drive mechanism 41 is arranged on the test bench 1, and the clamping mechanism 43 is connected to the translation drive mechanism 41 and is used to clamp the product to be tested. The translation drive mechanism 41 is used to drive the clamping mechanism 43 to translate, thereby driving the product to be tested to translate through the clamping mechanism 43, to achieve multiple reciprocating sliding fatigue life tests and friction coefficient measurement operations, and the tension detection mechanism 42 is arranged between the translation drive mechanism 41 and the clamping mechanism 43 and is used to detect the horizontal tension applied by the translation drive mechanism 41 to the clamping structure 43, so as to understand the magnitude of the tension in real time and facilitate the testing of the friction threshold.

[0069] like Figure 5 As shown, the translation drive mechanism 41 includes a vertical pole 411 erected on the test bench 1, and a first linear drive component 412 and a telescopic scissors frame 413 vertically spaced on the vertical pole 411, the first end of the telescopic scissors frame 413 is connected to the vertical pole 411, the second end of the telescopic scissors frame 413 is horizontally extended in the direction toward the detection device 2 and connected to the tension detection mechanism 42, the first linear drive component 412 is connected to one of the hinge nodes at the middle section of the telescopic scissors frame 413 and is used to drive the telescopic scissors frame 413 to move telescopically.

[0070] Specifically, the telescopic scissors frame 413 includes a plurality of telescopic components connected in sequence along its length direction, and a single telescopic component includes two movable rods hinged to each other to form an "X"-shaped structure, and the movable rods on two adjacent telescopic components are hinged one by one to form a plurality of parallelogram structures, so as to realize the telescopic activity of the telescopic scissors frame 413 through the synchronous expansion or retraction of the plurality of parallelogram structures. The first linear drive component 412 may specifically include an electric telescopic rod, a hydraulic rod and / or a gas rod, and the output end of the first linear drive component 412 is connected to the hinge node of one of the telescopic components at the middle position of the telescopic scissors frame 413, and when the output end of the first linear drive component 412 moves in the direction toward the detection device 2, the telescopic scissors frame 413 can be driven to expand and extend as a whole; similarly, when the output end of the first linear drive component 412 moves in the direction away from the detection device 2, the telescopic scissors frame 413 can also be driven to retract as a whole. The translational drive of the clamping mechanism 43 is realized by the cooperation between the first linear drive component 412 and the telescopic scissors frame 413, which effectively improves the stability and accuracy of the translational action, and the first linear drive component 412 can also be installed on the end of the telescopic scissors frame 413 away from the clamping mechanism 43, and transmitted through the thin telescopic scissors frame 413, which can avoid the first linear drive component 412 from blocking and interfering with the test operation, for example, avoiding the pressurizing device 3 from pressing the first linear drive component 412.

[0071] like Figure 6 As shown, the tension detection mechanism 42 includes a force transmission member 421, a movable member 422, a movable plate 423, a third pressure sensor 424 and a third pressure spring 425, the force transmission member 421 is connected to the translation drive mechanism 41, the movable member 422 is connected to the clamping mechanism 43 and is provided with a movable groove 4211 extending along the driving direction of the translation drive mechanism 41, the movable plate 423 is movably arranged in the movable groove 4211 and is connected to the movable member 422, the third pressure sensor 424 is arranged on a side of the movable plate 423 facing the clamping mechanism 43, the first end of the third pressure spring 425 abuts the third pressure sensor 423, and the second end of the third pressure spring 425 abuts the inner wall of the movable groove 4211 facing the translation drive mechanism 41.

[0072] Specifically, the movable groove 4211 is arranged inside the force transmission member 421, and a movable hole communicating with the movable groove 4211 is opened on the side wall of the force transmission member 421. The movable member 422 can be movably sleeved on the outer periphery of the force transmission member 421. The movable member 422 is provided with a connecting portion that penetrates into the movable groove 4211 along the movable hole and is connected to the movable plate 423. The movable member 422 is guided and moved relative to the force transmission member 421 by the guiding cooperation between the movable plate 423 and the movable groove 4211. The third pressure sensor 424 is arranged on the side wall of the movable groove 4211 facing the clamping mechanism 43, and the third pressure spring 425 is pressed between the side wall on the other side of the movable groove 4211 and the third pressure sensor 424.

[0073] When the translation drive mechanism 41 drives the clamping mechanism 43 to pull back in the direction away from the detection device 2, the third pressure spring 425 squeezes the third pressure sensor 424 and drives the movable plate 423 to move, thereby pulling back the movable member 422 through the movable plate 423, and detecting the magnitude of the pulling force in real time through the third pressure sensor 424, which is convenient for testing the threshold of the friction force and simulating the actual use conditions of the product to be tested. Secondly, different pulling forces are adapted by different compression amounts of the third pressure spring 425 to avoid the pulling force of the force transmission member 421 being directly rigidly transmitted to the third pressure sensor 424, causing the third pressure sensor 424 to be squeezed and deformed, thereby ensuring the stable use of the third pressure sensor 424, and the third pressure spring 425 can also be used to play an elastic buffering role to avoid damage to the product to be tested.

[0074] Furthermore, the tension detection mechanism 42 also includes a tension display panel 426 electrically connected to the third pressure sensor 424. The tension display panel 426 can be specifically installed on the force transmission member 421 or the movable member 422. The tension display panel 426 is used to display the detection pressure of the third pressure sensor 424 in real time, so as to facilitate direct observation of the magnitude of the tension.

[0075] Furthermore, a pushing portion 4221 is also provided on the movable part 422, and the pushing portion 4221 is used to abut against the end face of the force transmission member 421 facing the detection device 2. When the translation drive mechanism 41 drives the clamping mechanism 43 to move in the direction toward the detection device 2, the movable part 422 can abut against the force transmission member 421 through the pushing portion 4221 and withstand the thrust of the force transmission member 421, thereby stably pushing the clamping mechanism 43 to move, thereby preventing the third pressure spring 425 from being subjected to excessive tensile force and undergoing plastic deformation.

[0076] It is worth noting that in this embodiment, the tension detection mechanism 42 only needs to detect the tension applied by the translation drive mechanism 41, so only the third pressure sensor 424 is provided to detect the tension. In other embodiments, the tension detection mechanism 42 may also include a fourth pressure sensor provided on the pushing portion 4221, and a fourth pressure spring pressed between the fourth pressure sensor and the force transmission member 421. When the translation drive mechanism 41 drives the force transmission member 421 to push the movable member 422 to move, the fourth pressure sensor can be squeezed by the fourth pressure spring and the thrust can be detected in real time by the fourth pressure sensor, so as to record more test data and meet more test requirements.

[0077] like Figure 7 As shown, the clamping mechanism 43 includes a connecting plate 431, a clamping jaw 432, a second linear drive component 433 and a connecting rod 434. The connecting plate 431 is connected to the movable part 422. Two clamping jaws 432 are provided. The two clamping jaws 432 are respectively arranged on opposite sides of the connecting plate 431 and are respectively hinged to the connecting plate 431. The second linear drive component 433 is arranged on the middle part of the connecting plate 431. Two connecting rods 434 are provided. The first ends of the two connecting rods 434 are respectively hinged to the second linear drive component 433, and the second ends of the two connecting rods 434 are hinged to the two clamping jaws 432 one by one, and the hinged position of the connecting rod 434 on the clamping jaw 432 has a spacing relative to the connecting plate 431. The second linear drive component 433 may specifically include an electric telescopic rod, a hydraulic rod and / or a gas rod. The output end of the second linear drive component 433 is used to synchronously drive the two connecting rods 434 to move and rotate through telescopic activities, thereby driving the two clamping jaws 432 to move closer to or away from each other through the two connecting rods 434, thereby realizing the clamping and releasing actions of the two clamping jaws 432.

[0078] Specifically, the clamping jaws 432, the second linear drive assembly 433 and the connecting rod 434 are all arranged on the side of the connecting plate 43 facing the detection device 2, so that the side of the connecting plate 43 away from the detection device 2 can be installed on the movable member 422 without interference, thereby realizing the stable transmission of the thrust force. Secondly, the two clamping jaws 432 are synchronously driven to approach or move away from each other through the cooperation of the second linear drive assembly 433 and the two connecting rods 434. The driving structure is simple and efficient, and the second linear drive assembly 433 and the connecting rod 434 can also be arranged on the clamping jaws 432 at a position away from the product to be tested, thereby avoiding interference with the clamping.

[0079] Furthermore, a flexible rubber pad 435 is provided at one end of the clamping jaw 432 away from the connecting plate 431. The flexible rubber pad 435 can be made of rubber, silicone or other materials and has anti-slip patterns on its surface. The clamping jaw 432 is used to clamp the product to be tested through the flexible rubber pad 435, so as to achieve buffering protection and anti-slip effect through the flexible rubber pad 435, thereby improving clamping stability and improving test accuracy.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional fatigue testing equipment, characterized in that: The test bench (1) comprises a testing bench (1), and a testing device (2), a pressure device (3) and a translation device (4) respectively arranged on the testing bench (1), wherein the testing device (2) is used to support the product to be tested, the pressure device (3) is arranged above the testing device (2) and is used to apply downward pressure to the product to be tested, and the translation device (4) is arranged on one side of the testing device (2), and is used to clamp the product to be tested and drive the product to be tested to translate on the testing device (2); The detection device (2) comprises a detection box (21), a slider (22), a support plate (23), two first pressure sensors (24) and two first pressure springs (25); the slider (22) is slidably arranged in the detection box (21) along the driving direction of the translation device (4); the support plate (23) is connected to the slider (22) and is used to support the product to be detected; the two first pressure sensors (24) are arranged on opposite sides of the detection box (21) along the driving direction of the translation device (4); the two first pressure springs (25) are respectively abutted against the two first pressure sensors (24) and are respectively arranged on opposite sides of the slider (22); the support plate (23) is used to drive the movement through the friction force of the product to be detected when the product to be detected is translated, thereby driving the slider (22) to squeeze the first pressure spring (25) and detect the pressure applied to the first pressure spring (25) in real time through the corresponding first pressure sensor (24).

2. The multifunctional fatigue testing equipment according to claim 1, characterized in that: The detection device (2) further comprises a guide rod (26) extending along the driving direction of the translation device (4); the slider (22) is inserted into the guide rod (26) and is used for guiding and sliding along the guide rod (26); and two first pressure springs (25) are respectively sleeved on opposite ends of the guide rod (26) and are fixed in position by the guide rod (26).

3. The multifunctional fatigue testing equipment according to claim 1, characterized in that: The pressurizing device (3) comprises a bracket (31) and a lifting mechanism (32), and a pressurizing rod (33), a second pressurizing spring (34), a second pressure sensor (35) and a pressurizing plate (36) which are sequentially connected from top to bottom; The bracket (31) is arranged on the test bench (1), the lifting mechanism (32) is installed on the bracket (31) and is erected above the detection device (2) through the bracket (31), the lifting mechanism (32) is connected to the pressure rod (33) and is used to drive the pressure rod (33) to move up and down, thereby squeezing the second pressure spring (34) and detecting the pressure applied to the second pressure spring (34) in real time through the second pressure sensor (35), and the pressure plate (36) is used to abut against the top surface of the product to be tested and apply downward pressure to the product to be tested.

4. The multifunctional fatigue testing equipment according to claim 3, characterized in that: The pressurizing device (3) further comprises a movable cylinder (37) connected to the pressurizing plate (36), wherein the movable cylinder (37) is sleeved on the outer periphery of the pressurizing rod (33) and is used for guiding and sliding along the pressurizing rod (33), and the second pressurizing spring (34) is arranged in the movable cylinder (37).

5. The multifunctional fatigue testing equipment according to claim 3, characterized in that: The pressurizing device (3) further comprises two guide rails (38) which are arranged on opposite sides of the detection device (2) and extend along the driving direction of the translation device (4); the bracket (31) comprises two legs (311) which are connected to the two guide rails (38) in a one-to-one correspondence, and a crossbeam (312) which connects the two legs (311) into a whole and straddles the top of the detection device (2); the lifting mechanism (32) is mounted on the crossbeam (312); the legs (311) are used to guide and move along the guide rails (38) and adjust the horizontal position of the lifting mechanism (32); and the legs (311) are provided with a locking assembly which is used to lock and fix relative to the guide rails (38).

6. The multifunctional fatigue testing equipment according to any one of claims 3 to 5, characterized in that: The pressurizing device (3) further comprises two stopper components (39) both arranged on the bottom surface of the pressurizing plate (36) and respectively used to abut against opposite sides of the product to be tested; The limiting assembly (39) comprises a fixed plate (391), a movable pin (392), a limiting plate (393) and a limiting spring (394); the fixed plate (391) is connected to the bottom surface of the pressure plate (36); the movable pin (392) is movably arranged on the fixed plate (391) in a direction toward the product to be tested; the limiting plate (393) is arranged at a first end of the movable pin (392) and is used to abut against the product to be tested; the second end of the movable pin (392) extends out to a side of the fixed plate (391) away from the limiting plate (393) and is provided with a driving handle; the limiting spring (394) is pressed between the fixed plate (391) and the limiting plate (393) and is sleeved on the movable pin (392).

7. The multifunctional fatigue testing equipment according to any one of claims 3 to 5, characterized in that: The lifting mechanism (32) comprises a lifting seat (321), a lifting motor (322) arranged on the lifting seat (321), a screw rod (323) connected to the output shaft of the lifting motor (322), and a lifting block (324) sleeved on the screw rod (323) and threadedly connected to the screw rod (323); a guide groove (3211) adapted to the lifting block (324) is arranged in the lifting seat (321); the lifting block (324) is embedded in the guide groove (3211) and is used to move up and down along the guide groove (3211) under the drive of the lifting motor (322); The lifting mechanisms (32) are provided with two at intervals, and the pressurizing device (3) further comprises a connecting piece (320) which is provided between the two lifting mechanisms (32) and connects the lifting blocks (324) on the two lifting mechanisms (32) into a whole, and the pressurizing rod (33) is connected to the connecting piece (320).

8. The multifunctional fatigue testing equipment according to claim 1, characterized in that: The translation device (4) comprises a translation drive mechanism (41) arranged on the test bench (1), a clamping mechanism (43) connected to the translation drive mechanism (41), and a tension detection mechanism (42) arranged between the translation drive mechanism (41) and the clamping mechanism (43); The tension detection mechanism (42) comprises a force transmission member (421), a movable member (422), a movable plate (423), a third pressure sensor (424) and a third pressure spring (425); the force transmission member (421) is connected to the translation drive mechanism (41); the movable member (422) is connected to the clamping mechanism (43); a movable groove (4211) is provided in the force transmission member (421) and extends along the driving direction of the translation drive mechanism (41); The movable plate (423) is movably arranged in the movable groove (4211) and connected to the movable member (422); the third pressure sensor (424) is arranged on a side of the movable plate (423) facing the clamping mechanism (43); the first end of the third pressure spring (425) abuts against the third pressure sensor (424); and the second end of the third pressure spring (425) abuts against an inner wall of the movable groove (4211) facing the translation drive mechanism (41).

9. The multifunctional fatigue testing equipment according to claim 8, characterized in that: The translation drive mechanism (41) comprises a vertical pole (411) erected on the test bench (1), and a first linear drive assembly (412) and a telescopic scissors frame (413) arranged on the vertical pole (411) at intervals in the vertical direction, wherein the first end of the telescopic scissors frame (413) is connected to the vertical pole (411), the second end of the telescopic scissors frame (413) is horizontally extended in a direction toward the detection device (2) and is connected to the force transmission member (421), and the first linear drive assembly (412) is connected to one of the hinge nodes at the middle section of the telescopic scissors frame (413) and is used to drive the telescopic scissors frame (413) to move telescopically.

10. The multifunctional fatigue testing equipment according to claim 8 or 9, characterized in that: The clamping mechanism (43) comprises a connecting plate (431) connected to the movable part (422) and two clamping jaws (432) respectively hinged to opposite sides of the connecting plate (431), and a second linear drive component (433) arranged on the middle part of the connecting plate (431) and two connecting rods (434) respectively hinged to the second linear drive component (433), and one end of the two connecting rods (434) away from the second linear drive component (433) is hinged to the two clamping jaws (432) in a one-to-one correspondence, and the second linear drive component (433) is used to synchronously drive the two connecting rods (434) to move and drive the two clamping jaws (432) to move closer to or away from each other.

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