CN216955122U - Fatigue testing device - Google Patents

Abstract

This specification embodiment provides a fatigue test device for test piece to be measured, the fatigue test device includes: the device comprises a power output part, a driving part, a driven part, a load piece, a first measuring part and a second measuring part; the power output part is connected with the driving part, and the first measuring part is connected with the power output part or the driving part and is used for detecting the torque output to the driving part by the power output part; the driven part is connected with the load piece and can drive the load piece to swing around the axis of the driven part; the piece to be tested is wound on the driving part and the driven part during testing; at least part of the second measuring part can move along a direction perpendicular to a connecting line of the driving part and the driven part so as to detect the tension of the piece to be detected.

Description

Fatigue testing device

Technical Field

This specification relates to the fatigue test field, in particular to fatigue test device.

Background

The transmission belt or the transmission rope can be suitable for long-distance transmission, has the advantages of simple structure, low cost and the like, and can be applied to the transmission belt or the transmission rope in the fields of mechanical manufacture, military industry, aerospace, medical treatment, intelligent equipment and the like. In the field of intelligent robots, driving belts or driving ropes are generally applied to joints of robots, so that higher requirements are provided for the fatigue life and reliability of the driving belts or the driving ropes. It is necessary to provide a fatigue testing device with complete functions and high testing precision to test the fatigue life and reliability of the driving belt or the driving rope.

SUMMERY OF THE UTILITY MODEL

One of the embodiments of the present specification provides a fatigue test apparatus, for testing a device under test, the fatigue test apparatus includes: the device comprises a power output part, a driving part, a driven part, a load piece, a first measuring part and a second measuring part; the power output part is connected with the driving part, and the first measuring part is connected with the power output part or the driving part and used for detecting the torque output to the driving part by the power output part; the driven part is connected with the load part and can drive the load part to swing around the axis of the driven part; the piece to be tested is wound on the driving part and the driven part during testing; at least part of the second measuring part can move along a direction perpendicular to a connecting line of the driving part and the driven part so as to detect the tension of the piece to be detected.

In some embodiments, the fatigue testing device further includes a tensioning joint, the tensioning joint is disposed on the driving portion and/or the driven portion, one end of the to-be-tested object is connected with the tensioning joint, and the tensioning joint is used for adjusting the tensioning force of the to-be-tested object.

In some embodiments, the second measurement portion comprises a force measuring device and a distance measuring device; the force measuring device comprises a main body and a measuring head, wherein the measuring head is movably arranged on the main body, and the main body can collect acting force borne by the measuring head; the distance measuring device comprises a graduated scale and an indicating piece, wherein the graduated scale is fixed to the main body and is provided with scales arranged along the moving direction of the measuring head, one end of the indicating piece is connected with the measuring head, and the other end of the indicating piece points to the scales of the graduated scale.

In some embodiments, the second measuring portion further comprises a manipulating member cooperating with the measuring head for manipulating the measuring head to move; the measuring head with when the piece butt that awaits measuring, the main part is gathered the power that the measuring head received, the indicator instruction the measuring head for the displacement distance of main part.

In some embodiments, the driving portion includes a first driving wheel, a first rotating shaft coaxially fixed with the first driving wheel, and a first bearing, the first bearing is sleeved on the first rotating shaft, the driven portion includes a second driving wheel, a second rotating shaft coaxially fixed with the second driving wheel, and a second bearing is sleeved on the second rotating shaft; the piece to be detected is wound on the first transmission wheel and the second transmission wheel.

In some embodiments, the center of gravity of the load member is not coincident with the axis of rotation of the driven portion.

In some embodiments, the fatigue testing device further comprises a housing having a test space in which the driving part and the driven part are disposed; the second measuring portion is provided on the housing.

In some embodiments, the load member includes a stopper, and the stopper swings with the swing of the load member; the shell comprises a limiting blocking piece, the limiting blocking piece is provided with a first stopping end and a second stopping end, and the first stopping end and the second stopping end are positioned at two ends of the movement stroke of the limiting block;

the load member has a first test state and a second test state: in the first test state, the limiting block reciprocates between the first stop end and the second stop end; in the second test state, the limiting block is abutted against the first stop end or the second stop end.

In some embodiments, the fatigue testing device further comprises a support portion on which the housing is disposed.

In some embodiments, the fatigue testing device further comprises a protective cover, the power take-off being disposed within the protective cover.

According to the characteristics of the fatigue testing device, the load working condition of the to-be-tested piece is simulated by swinging the load piece around the axis of the driven part. The load torque of the piece to be tested is detected through the first measuring part, the tension and other data of the piece to be tested are detected through the second measuring part, the obtained data are comprehensive, the relation curve between the fatigue life and indexes such as the load torque and the tension is favorably established, and the accuracy of the test result is improved. The fatigue testing device has simple integral structure and complete functions.

Drawings

The present description will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings. These embodiments are not intended to be limiting, and in these embodiments like numerals are used to indicate like structures, wherein:

FIG. 1 is a schematic diagram of a fatigue testing device according to some embodiments herein;

FIG. 2 is a cross-sectional view taken along line A-A of a fatigue testing apparatus according to some embodiments of the present description;

FIG. 3 is a schematic diagram of a portion of a fatigue testing apparatus according to some embodiments herein;

FIG. 4 is a schematic diagram of a second measurement portion according to some embodiments herein;

FIG. 5 is a front isometric view of a fatigue testing device according to some embodiments herein;

FIG. 6 is a rear isometric view of a fatigue testing device according to some embodiments herein;

FIG. 7 is a partial cross-sectional view of a fatigue testing device according to some embodiments herein.

Reference numerals: 1. a fatigue testing device; 10. a power output section; 110. a protective cover; 20. an active part; 210. a first drive pulley; 220. a first rotating shaft; 230. a first bearing; 30. a driven part; 310. a second transmission wheel; 320. a second rotating shaft; 330. a second bearing; 40. a load member; 410. a swing rod; 420. a load-adjusting element; 430. a limiting block; 50. a first measuring section; 60. a second measuring section; 610. a force measuring device; 611. a main body; 612. a measuring head; 613. a result output part; 620. a distance measuring device; 621. a graduated scale; 622. an indicator; 630. a manipulation member; 710. tensioning the joint; 720. fixing the joint; 80. a housing; 810. a test space; 820. a limiting blocking piece; 821. a first stop end; 822. a second stop end; 830. avoiding the gap; 90. a support portion; 910. a base plate; 920. a vertical plate; 930. a side plate; 2. a piece to be tested; C. an axis.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only examples or embodiments of the present description, and that for a person skilled in the art, the present description can also be applied to other similar scenarios on the basis of these drawings without inventive effort. Unless otherwise apparent from the context, or stated otherwise, like reference numbers in the figures refer to the same structure or operation.

It should be understood that "system", "apparatus", "unit" and/or "module" as used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this specification and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

Flow charts are used in this description to illustrate operations performed by a system according to embodiments of the present description. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the various steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to the processes, or a certain step or several steps of operations may be removed from the processes.

The fatigue testing device in the embodiment of the specification can simulate various working conditions to test the fatigue performance of the piece to be tested (such as a conveyor belt and a conveyor rope), and the fatigue life of the piece to be tested is calculated according to the fatigue performance. Since the fatigue life is related to various factors, taking a conveyor belt as an example, the main factors affecting the fatigue life of the conveyor belt at least include the tension of the conveyor belt, the load torque of the conveyor belt, and the like, the influence of the various factors should be considered as much as possible when estimating the fatigue life of the conveyor belt, so that a more accurate test result can be obtained. Based on this, the fatigue test device in this specification embodiment can be through the load condition of the piece that awaits measuring such as load piece simulation drive belt, can also gather data such as the load moment of torsion, tensile force of the piece that awaits measuring, and is multiple functional. By collecting relatively comprehensive data such as load torque, tension force and the like, a relation curve between indexes such as the load torque, the tension force and the like and the fatigue life is established, and the accuracy of a test result is improved.

FIG. 1 is a schematic diagram of a fatigue testing device according to some embodiments herein; FIG. 2 is a cross-sectional view taken along line A-A of a fatigue testing apparatus according to some embodiments of the present description.

Embodiments of the present description provide a fatigue testing device 1, the fatigue testing device 1 may be used for testing a piece 2 to be tested, and the piece 2 to be tested may include, but is not limited to, a conveyor belt, a conveyor rope, and the like. In some embodiments, referring to fig. 1 and 2, the fatigue testing device 1 comprises at least: the power output portion 10, the driving portion 20, the driven portion 30, the load 40, the first measuring portion 50, and the second measuring portion 60.

The power output unit 10 is connected to the driving unit 20, the first measurement unit 50 is connected to the power output unit 10 or the driving unit 20, and the first measurement unit 50 detects a torque output from the power output unit 10 to the driving unit 20.

In some embodiments, the power output portion 10 may be an electric motor, a motor, or the like, and the power output portion 10 may be capable of outputting power to the driving portion 20. The first measurement portion 50 may be an instrument capable of measuring a torque change of the active portion 20, including but not limited to a strain type torque sensor, a magneto-strain type torque sensor, or a photo-electric type torque sensor, etc. In some embodiments, the first measurement portion 50 may be connected to an output shaft of the power output portion 10.

In some embodiments, the first measuring portion 50 may also be coupled to a rotating shaft of the driving portion 20, the first measuring portion 50 being capable of measuring a torque exerted thereon by the driving portion 20.

The driven part 30 is connected with the load member 40, and the driven part 30 can drive the load member 40 to swing around the axis C of the driven part 30. In some embodiments, the load member 40 may be a structural member that adds load to the driven portion 30. In some embodiments, the driving portion 20 drives the driven portion 30 to rotate, and the load member 40 swings around the axis C of the driven portion 30, having a property of resisting the rotation of the driven portion 30, thereby applying a torque to the driven portion 30.

In some embodiments, the power output portion 10 can output torque with alternating directions, and the driving portion 20 can rotate clockwise and counterclockwise periodically under the action of the power output portion 10, so that the load member 40 can swing around the axis C of the driven portion 30.

The test object 2 is wound around the driving portion 20 and the driven portion 30 during testing. In some embodiments, one end of the device under test 2 may be fixed to the driven portion 30, and the other end of the device under test 2 may be fixed to the driving portion 20. The driving part 20 drives the driven part 30 to rotate through the piece to be tested 2, and the driven part 30 drives the load piece 40 to swing, so that the fatigue life of the piece to be tested 2 under the load torque is detected.

At least a portion of the second measuring portion 60 is movable in a direction perpendicular to a line connecting the driving portion 20 and the driven portion 30 to detect a tension of the object 2. In some embodiments, when the device under test 2 is wrapped around the driving portion 20 and the driven portion 30, at least a portion of the device under test 2 is disposed along a line connecting the driving portion 20 and the driven portion 30, and when the second measuring portion 60 moves perpendicular to the line connecting the driving portion 20 and the driven portion 30, the second measuring portion can abut on the device under test 2 and push the device under test 2 to deform, and the tension of the device under test 2 can be calculated according to the force detected by the second measuring portion 60 and the distance moved by the abutting portion.

According to the above-described characteristics of the fatigue testing device 1, the load condition of the workpiece 2 is simulated by the swinging of the load member 40 about the axis C of the driven portion 30. The load torque of the piece to be tested 2 is detected through the first measuring part 50, the tension and other data of the piece to be tested 2 are detected through the second measuring part 60, the obtained data are comprehensive, the relationship curve between the fatigue life and indexes such as the load torque and the tension is favorably established, and the accuracy of the test result is improved. The fatigue testing device 1 has simple integral structure and complete functions.

Referring to fig. 2, in some embodiments, the driving portion 20 includes a first driving wheel 210, a first rotating shaft 220 coaxially fixed with the first driving wheel 210, and a first bearing 230, wherein the first bearing 230 is disposed on the first rotating shaft 220. In some embodiments, one end of the first rotating shaft 220, which is far away from the first driving wheel 210, is engaged with the power output portion 10 through the first measuring portion 50, the power output portion 10 can drive the first rotating shaft 220 to rotate, and the first rotating shaft 220 drives the first driving wheel 210 to rotate synchronously. In some embodiments, the diameter of the first drive wheel 210 may be greater than the diameter of the first spindle 220.

The driven part 30 includes a second driving wheel 310, a second rotating shaft 320 coaxially fixed with the second driving wheel 310, and a second bearing 330, wherein the second bearing 330 is sleeved on the second rotating shaft 320. In some embodiments, the object 2 is wound around the first driving wheel 210 and the second driving wheel 310, and an end of the second rotating shaft 320 far away from the second driving wheel 310 is engaged with the loading element 40. The first driving wheel 210 drives the object 2 to move, the object 2 drives the second driving wheel 310 to rotate, the second driving wheel 310 drives the second rotating shaft 320 to rotate synchronously, and the second rotating shaft 320 drives the load member 40 to rotate.

The first bearing 230 is arranged to support the first rotating shaft 220, and the second bearing 330 is arranged to support the second rotating shaft 320, so that the first bearing 230 and the second bearing 330 can bear radial force and interference torque of the first rotating shaft 220 and the second rotating shaft 320 in the rotating process, the torque detected by the first measuring part 50 is equal to the torque applied to the second transmission wheel 310 by the load part 40, and the accuracy of the measuring result is improved. The disturbance torque is other than the torque applied by the load member 40 to the second transmission wheel 310, for example, the disturbance torque may be a torque caused by a tension, vibration, inertia force or external force of the object to be measured.

In some embodiments, as shown in fig. 1 and 2, the center of gravity of the load member 40 is not coincident with the axis of rotation of the driven portion 30. In some embodiments, the load 40 includes a rocker 410 and a load adjustment member 420. One end of the swing link 410 is connected to the driven part 30, for example, one end of the swing link 410 may be fixed to an end surface of the second rotating shaft 320, and the other end of the swing link 410 is connected to the load adjusting member 420. The load adjusting element 420 can be configured with different weights for the other end of the swing link 410 according to the testing requirement, for example, the load adjusting element 420 can be a weight plate or a counterweight with known mass, and the load adjusting element 420 can adjust the gravity center and the overall weight of the load member 40, so as to adjust the torque applied by the load member 40 to the driven part 30 to meet the testing requirement.

In some embodiments, the torque output by the power output portion 10 to the driving portion 20 is equal to the torque loaded by the load 40 on the driven portion 30. The first measuring portion 50 is disposed between the power output portion 10 and the driving portion 20, and the torque loaded on the driven portion 30 by the load member 40 is obtained by measuring the torque output from the power output portion 10 to the driving portion 20. In some embodiments, the first measuring part 50 may be a torque sensor, and detects the torque output from the power output part 10 to the driving part 20 in real time, and records the variation curve of the torque with time during the load swing. In some embodiments, the first measurement portion 50 acquires a time-dependent change profile of the current of the power output portion 10, and calculates a time-dependent change profile of the torque of the corresponding output based on the time-dependent change profile of the current. In some embodiments, the first measuring part 50 may be a strain gauge attached to the output shaft of the power output part 10 or the rotation shaft of the driving part 20, and the strain gauge is capable of detecting the torsional deformation of the output shaft of the power output part 10 or the rotation shaft of the driving part 20, so as to obtain the torque output from the power output part 10 to the driving part 20, and record the torque as a time-varying curve.

Fig. 3 is a schematic view of a portion of the structure of a fatigue testing device 1 according to some embodiments of the present disclosure.

Referring to fig. 3, in some embodiments, the fatigue testing apparatus 1 further includes a tension joint 710, and the tension joint 710 is used for adjusting the tension of the object 2, i.e. the tension joint 710 can keep the object 2 having a proper tension during the transmission process, so as to avoid the object 2 from loosening or slipping.

In some embodiments, the tension joint 710 is one, the tension joint 710 is disposed on the driving portion 20, one end of the object 2 is connected to the tension joint 710, and the other end of the object 2 is disposed on the driven portion 30 through a fixing joint 720 or the like. In some embodiments, the tension joint 710 is one, the tension joint 710 is disposed on the driven portion 30, one end of the object 2 is connected to the tension joint 710, and the other end of the object 2 is disposed on the driving portion 20 through a fixing joint 720 and the like. In some embodiments, there are two tensioning joints 710, the two tensioning joints 710 are respectively disposed on the driving portion 20 and the driven portion 30, and two ends of the object 2 are respectively connected to the tensioning joints 710.

Fig. 4 is a schematic structural view of a second measurement portion 60 according to some embodiments herein.

Referring to fig. 4, in some embodiments, the second measurement portion 60 includes a force measuring device 610 and a distance measuring device 620; the force measuring device 610 can detect an external force acting thereon, and the distance measuring device 620 can detect a distance that the second measuring part 60 moves in a direction perpendicular to a line connecting the driving part 20 and the driven part 30.

In some embodiments, the force measuring device 610 includes a body 611 and a measuring head 612, the measuring head 612 is movably disposed on the body 611, and the body 611 is capable of collecting the force applied to the measuring head 612. In some embodiments, the main body 611 may be fixed between the line connecting the driving part 20 and the driven part 30, and the measuring head 612 is arranged to move in a direction perpendicular to the line connecting the driving part 20 and the driven part 30. In some embodiments, when the measuring head 612 abuts against the object 2, the measuring head 612 applies a pushing force to the object 2, and the object 2 generates a reaction force to the measuring head 612. The main body 611 collects the force applied to the measuring head 612, and the force collected by the main body 611 is equal to the reaction force of the object 2 to be measured on the measuring head 612, and the force is perpendicular to the direction of the connecting line of the driving part 20 and the driven part 30.

In some embodiments, the force measuring device 610 may be a spring load cell, a pressure sensor, or the like. In some embodiments, the force measuring device 610 may further include a result output element 613, and the result output element 613 may include, but is not limited to, a digital display, a pointer instrument panel, or a signal output structure connected to a cloud.

In some embodiments, the second measuring portion 60 further comprises a manipulating member 630, and the manipulating member 630 is coupled with the measuring head 612 for manipulating the movement of the measuring head 612. In some embodiments, the handle 630 may be a rotating handle that is coupled to the measuring head 612 via a gear mechanism, such as a gear. In operation, the rotating handle rotates to move the measuring head 612 linearly. In some embodiments, the handle 630 may be a push handle, which may be directly connected to the measurement head 612. In operation, linear movement of the push handle moves the measurement head 612 linearly.

In some embodiments, the distance measuring device 620 includes a graduated scale 621 and an indicator 622, the graduated scale 621 is fixed with the main body 611 and has a scale arranged along the moving direction of the measuring head 612, one end of the indicator 622 is connected with the measuring head 612, and the other end of the indicator 622 points to the scale of the graduated scale 621. In some embodiments, the indicator 622 indicates a distance of movement of the measurement head 612 relative to the body 611. In operation, the measuring head 612 moves relative to the body 611, the indicator 622 moves synchronously with the measuring head 612, a start scale and an end scale of one end of the indicator 622 pointing to the scales are recorded, and the moving distance of the measuring head 612 relative to the body 611 can be calculated through the start scale and the end scale.

In some embodiments, the second measuring part 60 detects, through the force measuring device 610, that the main body 611 can acquire the force F applied to the measuring head 612, and detects, through the distance measuring device 620, the moving distance e of the measuring head 612 relative to the main body 611, and acquires the length L of a straight line segment of the device under test 2 wound on the driving part 20 and the driven part 30, which may be equal to the distance between the rotation axis of the driving part 20 and the rotation axis of the driven part 30. Based on the force F applied to the measuring head 612, the moving distance e of the measuring head 612 relative to the main body 611, and the length L of the straight line segment of the to-be-measured object 2 wound on the driving portion 20 and the driven portion 30, the tension T of the to-be-measured object 2 can be calculated, and the specific calculation formula (1) is as follows:

T＝F×L/2e (1)

wherein T is the tension of the piece to be measured 2; f is the force F experienced by the measuring head 612; l is the length of a straight line segment of the piece 2 to be measured wound on the driving part 20 and the driven part 30; e is the distance of movement of the measuring head 612 relative to the body 611.

Fig. 5 is a front isometric view of the fatigue testing device 1 shown in accordance with some embodiments herein. Fig. 6 is a rear isometric view of the fatigue testing device 1 shown in accordance with some embodiments herein.

Referring to fig. 5 and 6, in some embodiments, the fatigue testing device 1 further includes a housing 80, the housing 80 having a test space 810, the driving part 20 and the driven part 30 being disposed in the test space 810. In some embodiments, the housing 80 may be configured as a semi-enclosed structure having a bottom wall and a side wall, and the front end of the housing 80 is opened for the components such as the driving portion 20, the driven portion 30 and the device under test 2 to enter and exit the housing 80. The shell 80 can protect the driving part 20, the driven part 30 and the piece to be tested 2, avoid external interference in the test process, and simultaneously prevent the piece to be tested 2 from being broken open and injuring other parts or workers when the piece to be tested 2 fails.

In some embodiments, the second measurement portion 60 is disposed on the housing 80. In some embodiments, the main body 611 of the second measuring portion 60 is disposed outside the housing 80, and an avoiding notch 830 may be formed on a side wall of the housing 80, and the avoiding notch 830 is used for avoiding the measuring head 612 of the second measuring portion 60, so that the measuring head 612 can extend from the outside of the housing 80 to the inside of the housing 80 and abut against the object 2 to be measured.

FIG. 7 is a partial cross-sectional view of a fatigue testing device 1 according to some embodiments herein.

Referring to fig. 5 and 7, in some embodiments, the load member 40 includes a limiting block 430, and the limiting block 430 swings along with the swinging of the load member 40. In some embodiments, the limiting block 430 is disposed to protrude from the surface of the load member 40, and the limiting block 430 may be a cylindrical protrusion, a prismatic protrusion, or the like disposed on the swing link 410 of the load member 40.

In some embodiments, the housing 80 includes a limit stop 820, the limit stop 820 having a first stop end 821 and a second stop end 822, the first stop end 821 and the second stop end 822 being located at two ends of the movement stroke of the limit stop 430. In some embodiments, the position limiting barrier 820 may be configured as a U-shaped structure, with the first and second stop ends 821, 822 being the two ends of the U-shaped structure, respectively. In some embodiments, the position limiting stopper 820 may be further configured as two protrusions spaced apart at two ends of the moving stroke of the position limiting stopper 430, and the two protrusions are respectively used as the first stopping end 821 and the second stopping end 822.

In some embodiments, the load member 40 has a first test state and a second test state: the first test state may be a state where power transmission exists between the driving part 20 and the driven part 30, for example, a state where the power output part 10 drives the driving part 20 to rotate the driven part 30; the second test state may be a state in which there is no power transmission between the driving portion 20 and the driven portion 30, for example, a state in which the power output portion 10 is stopped, or the second state may be a state in which the device under test 2 is failed. In the first test state, the stop block 430 may reciprocate between the first stop end 821 and the second stop end 822, or the stop block 430 may stay anywhere between the first stop end 821 and the second stop end 822. In the second testing state, the stop block 430 abuts the first stop end 821 or the second stop end 822.

Through the cooperation of stopper 430 and spacing piece 820, when the piece 2 that awaits measuring became invalid suddenly during the test, spacing piece 820 was spacing to stopper 430, just also formed spacingly to load member 40, prevented that load member 40 from striking other parts under the action of gravity, improved fatigue test device 1's security.

Referring to fig. 5 and 6, in some embodiments, the fatigue testing device 1 further includes a support 90, and the housing 80 is disposed on the support 90. In some embodiments, the supporting portion 90 may include a bottom plate 910, a vertical plate 920 and two side plates 930, the two side plates 930 are respectively configured as a triangular plate and are respectively connected to two sides of the bottom plate 910 and the vertical plate 920, and the housing 80 may be disposed above the vertical plate 920, so that the overall structure is simple. The supporting portion 90 can provide a mounting base for the casing 80 of the fatigue testing device 1, and stability of fixing of the casing 80 is improved.

In some embodiments, the fatigue testing device 1 further comprises a protective cover 110, the power take-off 10 being arranged within the protective cover 110. In some embodiments, the protective cover 110 may be configured in a cylindrical shape, and one end of the protective cover 110 is fixed to the housing 80 to provide a protective space for the power output portion 10. The protective cover 110 can provide support for the power output part 10, so as to prevent the power output part 10 from generating deflection torque on the driving part 20, and meanwhile, the protective cover 110 can also play a role in protecting the power output part 10 against dust, water or electromagnetic shielding.

The beneficial effects that may be brought by the embodiments of the present application include, but are not limited to: (1) the load working condition of the piece to be tested is simulated by swinging the load piece around the axis of the driven part. The load torque of the piece to be tested is detected through the first measuring part, the tension and other data of the piece to be tested are detected through the second measuring part, the obtained data are comprehensive, the relation curve between the fatigue life and indexes such as the load torque and the tension is favorably established, and the accuracy of the test result is improved. The fatigue testing device has simple integral structure and complete functions; (2) the first bearing and the second bearing are arranged to bear the radial force and the interference torque of the first rotating shaft and the second rotating shaft in the rotating process, so that the accuracy of the measuring result is improved; (3) through the cooperation of stopper and spacing holding piece, when the piece that awaits measuring became invalid suddenly during the test, prevent that the load piece from striking other parts under the action of gravity, improve fatigue test device's security. It is to be noted that different embodiments may produce different advantages, and in different embodiments, any one or combination of the above advantages may be produced, or any other advantages may be obtained.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing detailed disclosure is to be regarded as illustrative only and not as limiting the present specification. Various modifications, improvements and adaptations to the present description may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present specification and thus fall within the spirit and scope of the exemplary embodiments of the present specification.

Also, the description uses specific words to describe embodiments of the specification. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the specification is included. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the specification may be combined as appropriate.

Additionally, the order in which the elements and sequences of the process are recited in the specification, the use of alphanumeric characters, or other designations, is not intended to limit the order in which the processes and methods of the specification occur, unless otherwise specified in the claims. While various presently contemplated embodiments have been discussed in the foregoing disclosure by way of example, it should be understood that such detail is solely for that purpose and that the appended claims are not limited to the disclosed embodiments, but, on the contrary, are intended to cover all modifications and equivalent arrangements that are within the spirit and scope of the embodiments herein. For example, although the system components described above may be implemented by hardware devices, they may also be implemented by software-only solutions, such as installing the described system on an existing server or mobile device.

Similarly, it should be noted that in the foregoing description of embodiments of the specification, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to imply that more features than are expressly recited in a claim. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

For each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited in this specification, the entire contents of each are hereby incorporated by reference into this specification. Except where the application history document does not conform to or conflict with the contents of the present specification, it is to be understood that the application history document, as used herein in the present specification or appended claims, is intended to define the broadest scope of the present specification (whether presently or later in the specification) rather than the broadest scope of the present specification. It is to be understood that the descriptions, definitions and/or uses of terms in the accompanying materials of this specification shall control if they are inconsistent or contrary to the descriptions and/or uses of terms in this specification.

Finally, it should be understood that the embodiments described herein are merely illustrative of the principles of the embodiments of the present disclosure. Other variations are also possible within the scope of the present description. Thus, by way of example, and not limitation, alternative configurations of the embodiments of the present specification can be seen as consistent with the teachings of the present specification. Accordingly, the embodiments of the present description are not limited to only those embodiments explicitly described and depicted herein.

Claims (10)

1. A fatigue testing device for testing a piece under test (2), the fatigue testing device (1) comprising:

a power output part (10), a driving part (20), a driven part (30), a load member (40), a first measuring part (50) and a second measuring part (60);

the power output part (10) is connected with the driving part (20), and the first measuring part (50) is connected with the power output part (10) or the driving part (20) and is used for detecting the torque output from the power output part (10) to the driving part (20);

the driven part (30) is connected with the load piece (40), and the driven part (30) can drive the load piece (40) to swing around an axis (C) of the driven part (30);

the piece to be tested (2) is wound on the driving part (20) and the driven part (30) during testing;

at least part of the second measuring part (60) can move along a direction perpendicular to a connecting line of the driving part (20) and the driven part (30) so as to detect the tension of the piece to be measured (2).

2. A fatigue testing device according to claim 1, wherein the fatigue testing device (1) further comprises a tension joint (710), the tension joint (710) is provided on the driving part (20) and/or the driven part (30), one end of the piece under test (2) is connected with the tension joint (710), and the tension joint (710) is used for adjusting the tension of the piece under test (2).

3. A fatigue testing device according to claim 1, wherein the second measuring portion (60) comprises a force measuring device (610) and a distance measuring device (620); the force measuring device (610) comprises a main body (611) and a measuring head (612), wherein the measuring head (612) is movably arranged on the main body (611), and the main body (611) can collect acting force applied to the measuring head (612); the distance measuring device (620) comprises a graduated scale (621) and an indicating piece (622), the graduated scale (621) is fixed with the main body (611) and has scales arranged along the moving direction of the measuring head (612), one end of the indicating piece (622) is connected with the measuring head (612), and the other end of the indicating piece (622) points to the scales of the graduated scale (621).

4. A fatigue testing device according to claim 3, wherein the second measuring portion (60) further comprises a manipulating member (630), the manipulating member (630) cooperating with the measuring head (612) for manipulating the measuring head (612) to move; when the measuring head (612) is abutted to the piece to be measured (2), the main body (611) collects the force applied to the measuring head (612), and the indicating piece (622) indicates the moving distance of the measuring head (612) relative to the main body (611).

5. The fatigue testing device according to claim 1, wherein the driving portion (20) comprises a first driving wheel (210), a first rotating shaft (220) coaxially fixed with the first driving wheel (210), and a first bearing (230), the first bearing (230) is sleeved on the first rotating shaft (220), the driven portion (30) comprises a second driving wheel (310), a second rotating shaft (320) coaxially fixed with the second driving wheel (310), and a second bearing (330), and the second bearing (330) is sleeved on the second rotating shaft (320); the piece to be detected (2) is wound on the first transmission wheel (210) and the second transmission wheel (310).

6. A fatigue testing device according to claim 1, wherein a center of gravity of the load member (40) does not coincide with a rotation axis of the driven portion (30).

7. The fatigue testing device according to claim 1, wherein the fatigue testing device (1) further comprises a housing (80), the housing (80) having a test space (810), the driving part (20) and the driven part (30) being disposed in the test space (810); the second measuring section (60) is provided on the housing (80).

8. A fatigue testing device according to claim 7, wherein said load member (40) comprises a stopper (430), said stopper (430) being swung in accordance with the swinging of said load member (40); the housing (80) comprises a limit stop (820), the limit stop (820) has a first stop end (821) and a second stop end (822), and the first stop end (821) and the second stop end (822) are positioned at two ends of the movement stroke of the limit stop (430);

the load (40) has a first test state and a second test state: in the first test state, the stop block (430) reciprocates between the first stop end (821) and the second stop end (822); in the second test state, the stop block (430) abuts the first stop end (821) or the second stop end (822).

9. A fatigue testing device according to claim 7, wherein the fatigue testing device (1) further comprises a support (90), the housing (80) being arranged on the support (90).

10. A fatigue testing device according to claim 1, wherein the fatigue testing device (1) further comprises a protective cover (110), the power take-off (10) being arranged inside the protective cover (110).

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