Platform for testing fatigue life of diaphragm cylinder

Abstract

The utility model relates to the technical field of diaphragm cylinder testing, and aims to solve the technical problems of too low frequency and long verification period. In order to solve the technical problem, the utility model provides the platform for testing the fatigue life of the diaphragm cylinder. A frame body comprises a connecting piece, a first plate and a second plate, wherein the first plate and the second plate are parallel to each other; the second plate is connected above the first plate through the connecting piece; the middle reciprocating plate is arranged between the first plate and the second plate in parallel; the lower surface of the middle reciprocating plate is provided with a mounting part for mounting a to-be-tested piece; the power assembly comprises a motor, an eccentric wheel and a reciprocating wheel, the motor is connected with the second plate, and the output end of the motor is connected with the eccentric wheel; the reciprocating wheel is matched with the eccentric wheel, is rotationally connected with the middle reciprocating plate and penetrates through the second plate to be connected with the middle reciprocating plate; and the middle reciprocating plate reciprocates up and down in the frame body along with the reciprocating wheel. The diaphragm testing device improves the frequency, shortens the verification period, and is suitable for diaphragm testing.

Description

TECHNICAL FIELD

[0001] The utility model relates to diaphragm cylinder test technical field, especially be used for diaphragm cylinder fatigue life test's platform. BACKGROUND

[0002] In industry, many parts work in the harsh working condition of repeated compression and rebound for a long time, such as spring, leaf spring, rubber diaphragm of cylinder and so on. In order to verify the fatigue life of these vulnerable parts, a special machine is usually needed to repeatedly compress and rebound these parts for a long time. These repeated actions usually have great force, short stroke and high frequency (the frequency usually needs to reach several million or even tens of millions of times, which may last for several months or even years) until the parts are damaged. Therefore, improving the compression and rebound frequency per unit time can greatly shorten the fatigue verification time and shorten the project delivery cycle.

[0003] The current fatigue life verification platform usually adopts cylinder drive, needs a special computer controller to control the repeated action of the cylinder, and the force is applied to the measured part to realize the fatigue life verification of the measured part. However, this way is limited by the cylinder itself, and the frequency is low, usually only about 100 times per minute, so it is not suitable for fatigue life verification of the cylinder diaphragm (the cylinder includes a bottom cover, a top cover, a diaphragm connected between the bottom cover and the top cover, and a piston extending in the top cover. Air is supplied from the bottom cover to the inside of the cylinder, thereby driving the diaphragm to push out the piston. Since the piston is pushed out repeatedly, the service life of the diaphragm determines the service life of the cylinder. Therefore, the fatigue life test of the diaphragm is needed, and the deformation stroke of the diaphragm is relatively small. CONTENT OF THE UTILITY MODEL

[0004] Therefore, the utility model solves the technical problems in the prior art.

[0005] To solve the above technical problems, the utility model provides a platform for diaphragm cylinder fatigue life test, which comprises:

[0006] The frame body comprises a connecting piece and first and second plates arranged in parallel with each other, and the second plate is connected above the first plate through the connecting piece;

[0007] The intermediate reciprocating plate is arranged in parallel between the first and second plates, and the lower surface of the intermediate reciprocating plate is provided with a mounting portion for mounting the measured part;

[0008] The power assembly comprises a motor, an eccentric wheel and a reciprocating wheel, the motor is connected with the second plate, and the output end of the motor is connected with the eccentric wheel; the reciprocating wheel is matched with the eccentric wheel, the reciprocating wheel is rotationally connected with the intermediate reciprocating plate, and the reciprocating wheel is connected with the intermediate reciprocating plate through the second plate; the intermediate reciprocating plate moves up and down in the frame body along with the reciprocating wheel.

[0009] In one embodiment of the utility model, the application further includes a proximity sensor for identifying the number of eccentric wheel rotation.

[0010] In one embodiment of the utility model, the application further includes a control assembly electrically connected with the proximity sensor and the motor.

[0011] In one embodiment of the utility model, the application further includes a guide assembly connected between the connecting piece and the intermediate reciprocating plate; the guide assembly includes a linear guide rail, a sliding block and an elastic piece, the linear guide rail is connected to the connecting piece; the sliding block is connected to the intermediate reciprocating plate, and the sliding block cooperates with the linear guide rail; and the elastic piece is connected between the intermediate reciprocating plate and the first plate.

[0012] In one embodiment of the utility model, the application further includes a buffer assembly arranged on the upper surface of the first plate, and the buffer assembly is located directly below the mounting portion; the buffer assembly includes a buffer layer and a mounting piece, and the buffer layer is connected to the first plate through the mounting piece.

[0013] In one embodiment of the utility model, the mounting piece includes a first mounting plate and a second mounting plate, the first mounting plate is fixedly connected to the first plate; the second mounting plate is connected above the first mounting plate through a bolt, the buffer layer is clamped between the first mounting plate and the second mounting plate, and a avoiding hole is formed in the second mounting plate.

[0014] In one embodiment of the utility model, the mounting portion includes a mounting fixed plate, two hanging pieces and two lock buckles; the mounting fixed plate is connected to the lower surface of the second plate; the two hanging pieces are connected to the two sides of the mounting fixed plate; and the lock buckles are hung on the hanging pieces and used for fixing the measured piece.

[0015] In one embodiment of the utility model, the bottom of the mounting fixed plate is provided with a plurality of positioning columns.

[0016] In one embodiment of the utility model, the bottom of the first plate is provided with a plurality of buffer footings.

[0017] In one embodiment of the utility model, at least one lightening hole is arranged on the first plate.

[0018] In one embodiment of the utility model, at least one lightening hole is arranged on the second plate.

[0019] In one embodiment of the utility model, at least one lightening hole is arranged on the first plate; and at least one lightening hole is arranged on the second plate.

[0020] The above technical solution of the utility model has the following advantages compared with the prior art:

[0021] The platform for diaphragm and cylinder fatigue life testing described in this utility model features an eccentric wheel driven by a motor. The reciprocating wheel rotates with the eccentric wheel, simultaneously driving an intermediate reciprocating plate in up and down linear motion. This converts rotational motion into linear motion acting on the test piece (cylinder), thereby verifying the fatigue life of the diaphragm in the test piece (cylinder). Because the motor can achieve high rotational speeds, the frequency can be increased to hundreds or even thousands of times. Therefore, the test frequency of this application is increased from 100 times per minute to hundreds or even thousands of times per minute, significantly increasing the frequency of fatigue life verification and shortening the project cycle. Furthermore, the eccentric wheel's eccentricity allows for adjustable output force and reciprocating stroke (the smaller the eccentricity, the greater the output force and the shorter the reciprocating stroke). This allows the diaphragm of the test piece (cylinder) to be compressed once per motor rotation. This enables short-stroke testing, making it suitable for cylinder diaphragm fatigue life verification. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model in conjunction with the accompanying drawings, wherein:

[0023] Figure 1 This is a structural schematic diagram of a platform for diaphragm cylinder fatigue life testing in a preferred embodiment of the present utility model;

[0024] Figure 2 yes Figure 1 The main view of the platform used for diaphragm cylinder fatigue life testing;

[0025] Figure 3 yes Figure 1 Schematic diagram of the first plate, buffer assembly and buffer foot connection in the platform for diaphragm cylinder fatigue life test;

[0026] Figure 4 yes Figure 1 Schematic diagram of the structure of the middle reciprocating plate in the platform used for diaphragm cylinder fatigue life test;

[0027] Description of the accompanying drawings: 100, frame; 110, connecting member; 120, first plate; 130, second plate;

[0028] 200, middle reciprocating plate; 210, mounting portion; 211, mounting fixing plate; 212, hanging member; 213, positioning column;

[0029] 300, power assembly; 310, motor; 320, eccentric wheel; 330, reciprocating wheel;

[0030] 400, proximity sensor;

[0031] 500, guide assembly; 510, linear guide rail; 520, slider; 530, elastic member;

[0032] 600, buffer assembly; 610, buffer layer; 620, mounting member; 621, first mounting plate; 622, second mounting plate; 623, avoiding hole;

[0033] 700, buffer footing;

[0034] 800, lightening hole. DETAILED DESCRIPTION

[0035] The utility model will be further explained in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0036] Referring to Figures 1-4 As shown in the figure, the utility model embodiment provides a kind of platform for diaphragm cylinder fatigue life test, comprising:

[0037] Frame body 100, including connecting piece 110 and the first plate 120 and the second plate 130 that are mutually parallel, second plate 130 is connected in the upper of first plate 120 by connecting piece 110;In some embodiments, connecting piece 110 is four, four connecting pieces 110 are arranged at four corners.

[0038] Intermediate reciprocating plate 200, it is parallelly arranged between first plate 120 and second plate 130;The lower surface of intermediate reciprocating plate 200 is equipped with the installation part 210 for installing the piece to be measured;

[0039] Power assembly 300, including motor 310, eccentric wheel 320 and reciprocating wheel 330, motor 310 is connected with second plate 130, and the output end of motor 310 is connected with eccentric wheel 320;Reciprocating wheel 330 is cooperated with eccentric wheel 320, reciprocating wheel 330 is rotatably connected with intermediate reciprocating plate 200, and it is connected with intermediate reciprocating plate 200 by passing through second plate 130;Intermediate reciprocating plate 200 reciprocates up and down in frame body 100 with reciprocating wheel 330.

[0040] When testing, the piece to be measured (cylinder) is hung upside down on installation part 210, and piston is towards first plate 120.In test, cylinder ventilation makes diaphragm push piston to extend, and intermediate reciprocating plate 200 moves downward to make piston contact with first plate 120 (buffer layer 610), then with the continuous downward movement of intermediate reciprocating plate 200, piston will be compressed back by buffer layer 610, and piston will compress diaphragm to overcome the gas pressure in cylinder, when piston is compressed to stroke end point, that is, a cycle is completed.

[0041] Specifically, the eccentric wheel 320 of the present application is driven by the motor 310, and the reciprocating wheel 330 drives the intermediate reciprocating plate 200 to move up and down linearly while rotating with the eccentric wheel 320, so as to convert the rotary motion into linear motion acting on the measured member (cylinder), thereby verifying the fatigue life of the diaphragm in the measured member (cylinder). Since the motor 310 can achieve a high speed, the frequency can be increased to hundreds or even thousands of times, so that the test frequency of the present application is increased from the previous 100 times per minute to hundreds or even thousands of times per minute, thereby greatly improving the frequency of fatigue life verification and shortening the project cycle. In addition, the present application can adjust the output force and reciprocating stroke (the smaller the eccentricity of the eccentric wheel 320, the greater the output force and the shorter the reciprocating stroke) through the eccentricity design of the eccentric wheel 320, so that the motor 310 can compress the diaphragm of the measured member (cylinder) once per revolution. The present application can realize short-stroke testing and is suitable for diaphragm fatigue life verification testing of the cylinder.

[0042] Further, the present application further comprises a proximity sensor 400 for identifying the number of rotations of the eccentric wheel 320. The proximity sensor 400 is arranged on the second plate 130 and located on one side of the eccentric wheel 320, for example, the upper side. Specifically, the proximity sensor 400 can sense the proximity of the eccentric wheel 320 once per revolution, that is, the fatigue life verification count is counted once, so as to monitor the number of fatigue life verifications in real time.

[0043] Further, the present application further comprises a control assembly electrically connected with the proximity sensor 400 and the motor 310. Specifically, the present embodiment can output the fatigue life verification number of the measured member monitored by the proximity sensor 400 to the control assembly in real time, and when the test requirement is reached, the control assembly can automatically control the motor 310 to stop working, thereby realizing fully automated testing.

[0044] Further, the present application further comprises a guide assembly 500 connected between the connecting piece 110 and the intermediate reciprocating plate 200; the guide assembly 500 comprises a linear guide rail 510, a sliding block 520 and an elastic member 530 (for example, a spring), the linear guide rail 510 is connected to the connecting piece 110; the sliding block 520 is connected to the intermediate reciprocating plate 200, and the sliding block 520 cooperates with the linear guide rail 510; the elastic member 530 is sleeved on the sliding block 520, and the elastic member 530 is connected between the intermediate reciprocating plate 200 and the first plate 120. Specifically, the present embodiment provides guidance for the up-and-down reciprocating movement of the intermediate reciprocating plate 200 through the guide assembly 500. In addition, the elastic member 530 can ensure that the eccentric wheel 320 and the reciprocating wheel 330 always maintain contact while reducing impact.

[0045] Further, the application further comprises a buffer assembly 600 arranged on the upper surface of the first plate 120, the buffer assembly 600 is located directly below the mounting portion 210; the buffer assembly 600 comprises a buffer layer 610 and a mounting piece 620, the buffer layer 610 is connected with the first plate 120 through the mounting piece 620. The buffer layer 610 is made of elastic material. Specifically, when the measured piece (cylinder) moves downward, the end of the piston will contact the buffer layer 610 instead of the first plate 120, thereby buffering and protecting the piston, avoiding damage to the piston.

[0046] Further, the mounting piece 620 comprises a first mounting plate 621 and a second mounting plate 622, the first mounting plate 621 is fixedly connected with the first plate 120 through bolts; the second mounting plate 622 is connected above the first mounting plate 621 through bolts, the buffer layer 610 is clamped between the first mounting plate 621 and the second mounting plate 622, and the second mounting plate 622 is provided with an avoiding hole 623. Specifically, the first mounting plate 621 and the second mounting plate 622 are used to realize the connection and fixation of the buffer layer 610 and the first plate 120 in the embodiment, which is simple in structure and stable and reliable.

[0047] Further, the mounting portion 210 comprises a mounting fixed plate 211, two suspension pieces 212 and two lock buckles (not shown in the figure); the mounting fixed plate 211 is connected to the lower surface of the second plate 130; the two suspension pieces 212 are connected to the two sides of the mounting fixed plate 211; the lock buckles are hung on the suspension pieces 212 and are used to fix the measured piece (cylinder). Specifically, the measured piece (cylinder) is hung upside down at the lower surface of the second plate 130 through the lock buckles in the embodiment. The embodiment realizes the quick installation of the measured piece.

[0048] Further, the bottom of the mounting fixed plate 211 is provided with a plurality of positioning columns 213. The measured piece is provided with a plurality of positioning holes, and the positioning holes are matched with the positioning columns 213. Specifically, the positioning columns 213 are matched with the positioning holes on the measured piece in the embodiment, so as to realize the limiting of the measured piece (cylinder) and the mounting portion 210, and avoid the installation deviation of the measured piece (cylinder) and affect the test effect.

[0049] Further, the bottom of the first plate 120 is provided with a plurality of buffer footings 700. In some embodiments, the buffer footings 700 are four, which are arranged at the four corners of the first plate 120. Specifically, the buffer footings 700 of the embodiment can provide damping function when the application is tested.

[0050] Further, at least one weight-reducing hole 800 is arranged on the first plate 120. At least one weight-reducing hole 800 is arranged on the second plate 130. At least one weight-reducing hole 800 is arranged on the first plate 120; at least one weight-reducing hole 800 is arranged on the second plate 130. Specifically, the weight-reducing holes 800 of the embodiment reduce the weight of the application, which is convenient for carrying and moving.

[0051] Obviously, the above embodiments are only examples for the purpose of clarity, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can also be made by those of ordinary skill in the art. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A platform for diaphragm cylinder fatigue life testing, characterized by: The utility model relates to a test device for testing the performance of a to-be-tested piece, comprising: a frame body comprising a connecting piece and a first plate and a second plate arranged in parallel with each other, the second plate being connected above the first plate through the connecting piece; an intermediate reciprocating plate arranged in parallel between the first plate and the second plate, the lower surface of the intermediate reciprocating plate being provided with a mounting portion for mounting the to-be-tested piece; a power assembly comprising a motor, an eccentric wheel and a reciprocating wheel, the motor being connected to the second plate, the output end of the motor being connected to the eccentric wheel; the reciprocating wheel being matched with the eccentric wheel, the reciprocating wheel being rotationally connected to the intermediate reciprocating plate and connected to the intermediate reciprocating plate through the second plate; the intermediate reciprocating plate reciprocatingly moving up and down in the frame body along with the reciprocating wheel.

2. The platform for diaphragm cylinder fatigue life testing of claim 1, wherein: The utility model further comprises a proximity sensor for identifying the number of rotations of the eccentric wheel.

3. The platform for diaphragm cylinder fatigue life testing of claim 2, wherein: The utility model further comprises a control assembly electrically connected to the proximity sensor and the motor, respectively.

4. The platform for diaphragm cylinder fatigue life testing of claim 1, wherein: The utility model further comprises a guide assembly connected between the connecting piece and the intermediate reciprocating plate; the guide assembly comprising a linear guide rail, a sliding block and an elastic member, the linear guide rail being connected to the connecting piece; the sliding block being connected to the intermediate reciprocating plate, the sliding block being matched with the linear guide rail; the elastic member being connected between the intermediate reciprocating plate and the first plate.

5. The platform for diaphragm cylinder fatigue life testing of claim 1, wherein: The utility model further comprises a buffer assembly provided on the upper surface of the first plate, the buffer assembly being located directly below the mounting portion; the buffer assembly comprising a buffer layer and a mounting member, the buffer layer being connected to the first plate through the mounting member.

6. The platform for diaphragm cylinder fatigue life testing of claim 5, wherein: The mounting member comprises a first mounting plate and a second mounting plate, the first mounting plate being fixedly connected to the first plate; the second mounting plate being connected above the first mounting plate through a bolt, the buffer layer being clamped between the first mounting plate and the second mounting plate, a avoiding hole being formed in the second mounting plate.

7. The platform for diaphragm cylinder fatigue life testing of claim 1, wherein: The mounting portion comprises a mounting fixed plate, two hanging members and two lock buckles; the mounting fixed plate being connected to the lower surface of the second plate; the two hanging members being connected to the two sides of the mounting fixed plate; the lock buckles being hung on the hanging members for fixing the to-be-tested piece.

8. The platform for diaphragm cylinder fatigue life testing of claim 7, wherein: The bottom of the mounting fixed plate is provided with a plurality of positioning columns.

9. The platform for diaphragm cylinder fatigue life testing of claim 1, wherein: The bottom of the first plate is provided with a plurality of buffer footings.

10. The platform for diaphragm cylinder fatigue life testing of claim 1, wherein: At least one lightening hole is formed in the first plate. At least one lightening hole is formed in the second plate.

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