CN220583741U

CN220583741U - Stretcher stress testing device

Info

Publication number: CN220583741U
Application number: CN202321804938.XU
Authority: CN
Inventors: 帅敏; 苏永红
Original assignee: Chengdu Jingchuang Aviation Technology Co ltd
Current assignee: Chengdu Jingchuang Aviation Technology Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2024-03-12
Anticipated expiration: 2033-07-10

Abstract

The application discloses stretcher stress testing arrangement, including the platform base, the platform base is used for fixed stretcher, be provided with the frame on the platform base, one side that the frame is close to the stretcher is provided with the fixed plate, be provided with the first fixed pulley of multiunit difference in height on the fixed plate, the height of the first fixed pulley of multiunit all is higher than the stretcher, the top sets up multiunit second fixed pulley in the frame, wind first stay cord between first fixed pulley and the second fixed pulley, the one end that first fixed pulley was walked around to first stay cord is used for connecting the stretcher, the other end that second fixed pulley was walked around to first stay cord is used for connecting the balancing weight, this application has improved the commonality, can carry out the advantage of various stress test mode.

Description

Stretcher stress testing device

Technical Field

The application relates to the technical field of mechanical testing devices, in particular to a stretcher stress testing device.

Background

The stretcher can be used as a logistics auxiliary device for temporarily loading and unloading cargos, and mechanical test is required to be carried out on the stretcher in the same batch after the stretcher is manufactured so as to acquire the mechanical property data of the stretcher in the batch. The existing mechanical testing device is used for carrying out stress test on the stretcher by carrying out a tensile test, but because the stretcher is complex in structure, the tensile tests of different sizes are needed to be carried out on different parts of the stretcher, the existing mechanical testing device is simple in structure, a test object can be connected through a single steel wire rope to carry out tensile loading, the testing mode is single, the stress data of the stretcher with such complex structure are difficult to be comprehensively tested, the universality is low, and more test requirements are difficult to be met.

Disclosure of Invention

The main aim of the application is to provide a stretcher stress testing device, which aims at solving the technical problems that the stress testing mode of the existing mechanical testing device on a stretcher is single and the universality is low.

In order to achieve the above-mentioned purpose, the application provides a stretcher stress testing arrangement, including the platform base, the platform base is used for fixed stretcher, be provided with the frame on the platform base, one side that the frame is close to the stretcher is provided with the fixed plate, be provided with the first fixed pulley of multiunit difference in height on the fixed plate, the height of the first fixed pulley of multiunit all is higher than the stretcher, the top sets up multiunit second fixed pulley in the frame, around having first stay cord between first fixed pulley and the second fixed pulley, the one end that first fixed pulley was walked around to first stay cord is used for connecting the stretcher, the other end that first stay cord walked around the second fixed pulley is used for connecting the balancing weight.

Optionally, the first fixed pulleys are all connected with pulley frames, the pulley frames are detachably connected to the fixed plate, and the height of the pulley frames on the fixed plate is adjustable.

Optionally, the platform base is further provided with a plurality of groups of third fixed pulleys, the third fixed pulleys are located between the stretcher and the fixed plate, a second pull rope is wound between the third fixed pulleys and the second fixed pulleys, one end of the second pull rope, which winds around the third fixed pulleys, is used for horizontally connecting the stretcher, and the other end, which winds around the second fixed pulleys, of the second pull rope is used for connecting the balancing weights.

Optionally, a binding band is arranged on the stretcher, and the binding band is used for binding the stretcher.

Optionally, the top is connected with the third stay cord in the frame, winds on the third stay cord and is equipped with the movable pulley, and the second fixed pulley is walked around to the third stay cord other end and is connected the balancing weight, and the movable pulley bottom is connected with the fourth stay cord, is provided with the fourth fixed pulley that is located between stretcher and the fixed plate on the platform base, and the fourth stay cord walks around the fourth fixed pulley and horizontally connected to the bandage.

Optionally, the device further comprises a fifth pull rope connected with the binding belt, wherein the fifth pull rope is connected with a tension meter, and the other end of the tension meter is connected with a sixth pull rope.

Optionally, the fifth stay cord is connected with the load bearing shaft, and the bandage cover is located on the load bearing shaft.

Optionally, a through hole is formed in the fixing plate, and the through hole is used for the passing of the tension meter and the sixth pull rope.

Optionally, two groups of fixing mechanisms are arranged on the platform base and used for fixing the front end and the rear end of the stretcher respectively.

Optionally, the fixing mechanism comprises a fixing seat connected to the platform base, and a plurality of groups of fastening bolts penetrating through the connecting stretcher are arranged on the fixing seat.

The beneficial effects that this application can realize are as follows:

according to the stretcher, the first fixed pulleys with different heights are arranged on the fixed plate, the first pull ropes on the first fixed pulleys with different heights can be selected to be pulled onto the stretcher according to test requirements, the other ends of the first pull ropes bypass the second fixed pulleys to be connected with the balancing weights, so that the first pull ropes form a certain angle of tension to the stretcher, the heights of the first fixed pulleys are different, the corresponding first pull ropes are different from each other, a certain angle tension test can be independently carried out, tension tests can also be carried out on the stretcher at different tension angles through the plurality of groups of first pull ropes, stress states of the stretcher can be observed in the test process respectively, and therefore stress tests of the stretcher are carried out.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a schematic structural view of a stress testing device for a stretcher according to an embodiment of the present application;

FIG. 2 is a schematic view of another view angle structure of a stress testing device for a stretcher according to an embodiment of the present application;

FIG. 3 is a schematic view of another view angle structure of a stress testing device for a stretcher according to an embodiment of the present application;

fig. 4 is a schematic view of a partially enlarged structure at a in fig. 1.

Reference numerals:

110-platform base, 120-stretcher, 130-frame, 140-fixed plate, 141-through port, 150-first fixed pulley, 160-second fixed pulley, 170-first pull rope, 180-pulley frame, 190-third fixed pulley, 210-second pull rope, 220-bandage, 230-third pull rope, 240-movable pulley, 250-fourth pull rope, 260-fourth fixed pulley, 270-fifth pull rope, 280-tensiometer, 290-sixth pull rope, 310-bearing shaft, 320-fixed mechanism, 321-fixed seat, 322-fastening bolt.

The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship between the components, the movement condition, and the like in a specific posture, and if the specific posture is changed, the directional indicator is correspondingly changed.

In the present application, unless explicitly specified and limited otherwise, the terms "coupled," "secured," and the like are to be construed broadly, and for example, "secured" may be either permanently attached or removably attached, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be regarded as not exist and not within the protection scope of the present application.

Examples

Referring to fig. 1-4, the embodiment provides a stress testing device for a stretcher, which comprises a platform base 110, wherein the platform base 110 is used for fixing the stretcher 120, a frame 130 is arranged on the platform base 110, a fixing plate 140 is arranged on one side, close to the stretcher 120, of the frame 130, a plurality of groups of first fixed pulleys 150 with different heights are arranged on the fixing plate 140, the heights of the plurality of groups of first fixed pulleys 150 are higher than those of the stretcher 120, a plurality of groups of second fixed pulleys 160 are arranged on the top in the frame 130, a first stay rope 170 is wound between the first fixed pulleys 150 and the second fixed pulleys 160, one end, which bypasses the first fixed pulleys 150, of the first stay rope 170 is used for connecting the stretcher 120, and the other end, which bypasses the second fixed pulleys 160, of the first stay rope 170 is used for connecting a balancing weight.

In this embodiment, by configuring multiple groups of first fixed pulleys 150 with different heights on the fixed plate 140, according to test requirements, a first pull rope 170 on the first fixed pulleys 150 with different heights can be selected to be pulled onto the stretcher 120, and the other end of the first pull rope 170 bypasses the second fixed pulley 160 to be connected with a balancing weight (not shown in the figure), so that the first pull rope 170 forms a certain angle of pull force on the stretcher 120, the heights of the first fixed pulleys 150 are selected to be different corresponding to the different pull angles of the first pull rope 170 on the stretcher 120, a certain angle pull test can be independently performed, and also a stress state of the stretcher 120 can be observed (the deformation condition of the stretcher 120 can be observed by matching with a machine vision technology) in the test process.

It should be noted that, the first pull rope 170 bypasses one end of the second fixed pulley 160 and can be connected with a hook (not shown in the figure), the first pull rope 170 is connected with a balancing weight through the hook, the balancing weight can be a weight, and weights with different numbers or different weights are loaded according to the requirement, so that tensile forces with different magnitudes are loaded to adapt to various test requirements. When the stress test is performed, the first pull rope 170 can be connected to different positions of the stretcher 120, so that stress analysis is performed on the positions, and the test mode is flexible.

As an alternative embodiment, the first fixed pulleys 150 are each connected with a pulley frame 180, the pulley frames 180 are detachably connected to the fixed plates 140, and the height of the pulley frames 180 on the fixed plates 140 is adjustable.

In this embodiment, the first fixed pulley 150 is detachably connected to the fixed plate 140 through the pulley frame 180, and meanwhile, the height of the pulley frame 180 on the fixed plate 140 is adjustable, so that the fixed height of the first fixed pulley 150 on the fixed plate 140 can be adjusted according to test requirements, and accordingly, the first pull rope 170 corresponding to the first fixed pulley 150 and the stretcher 120 form different connection included angles, and accordingly, different-angle tensile tests are performed, multi-angle stress analysis is facilitated, universality is further improved, and the application range is wide.

It should be noted that, a plurality of positioning holes with different heights are formed on the fixing plate 140, a plurality of mounting holes are correspondingly formed on the pulley frame 180, when the height of the first fixed pulley 150 is adjusted, the mounting holes on the corresponding pulley frame 180 are aligned to the positioning holes with corresponding heights, and then the mounting holes and the positioning holes are screwed in by fasteners such as screws, so that detachable connection and height adjustment are realized.

As an alternative embodiment, the platform base 110 is further provided with a plurality of groups of third fixed pulleys 190, the third fixed pulleys 190 are located between the stretcher 120 and the fixed plate 140, a second pull rope 210 is wound between the third fixed pulleys 190 and the second fixed pulleys 160, one end of the second pull rope 210, which bypasses the third fixed pulleys 190, is used for horizontally connecting the stretcher 120, and the other end, which bypasses the second fixed pulleys 160, of the second pull rope 210 is used for connecting the balancing weights.

In this embodiment, a third fixed pulley 190 fixed on the platform base 110 is further configured, the third fixed pulley 190 can pull the second pull rope 210, after one end of the second pull rope 210 bypasses the second fixed pulley 160 and is connected with a balancing weight, one end of the second pull rope 210 connected with the stretcher 120 can be straightened and horizontally arranged, so that horizontal pulling force is formed, the horizontal pulling force testing device is suitable for carrying out a horizontal pulling force test on the stretcher 120, the testing mode is further improved, and the universality is strong.

As an alternative embodiment, the stretcher 120 is provided with a binding band 220, and the binding band 220 is used to bind the stretcher 120, and the stretcher 120 can be bound by the binding band 220 for a tensile test.

As an alternative embodiment, the top of the frame 130 is connected with a third pull rope 230, a movable pulley 240 is wound on the third pull rope 230, the other end of the third pull rope 230 bypasses the second fixed pulley 160 and is connected with a balancing weight, the bottom of the movable pulley 240 is connected with a fourth pull rope 250, a fourth fixed pulley 260 positioned between the stretcher 120 and the fixed plate 140 is arranged on the platform base 110, and the fourth pull rope 250 bypasses the fourth fixed pulley 260 and is horizontally connected to the binding belt 220.

In this embodiment, the fourth fixed pulley 260 is configured to pull the fourth pull rope 250, and the fourth pull rope 250 is horizontally connected to the binding belt 220, so that a tensile test is performed on the whole frame 130, and because the binding belt 220 is stressed greatly, after the counterweight is configured at the other end of the third pull rope 230, a certain buffer effect can be formed through the movable pulley 240, so that the binding belt 220 is prevented from being broken by pulling by sudden loading force, and test safety is improved.

As an alternative embodiment, a fifth pull cord 270 is further included for connection to the strap 220, the fifth pull cord 270 being connected to a tension meter 280, the tension meter 280 being connected at the other end to a sixth pull cord 290.

In this embodiment, the other end of the sixth rope 290 is connected to a power mechanism (e.g., a hydraulic cylinder assembly), and the power mechanism is used to provide a pulling force to the sixth rope 290, so that the fifth rope 270 generates a pulling force to the whole of the binding band 220 and the stretcher 120, and the current pulling force data is read in real time through the pulling force meter 280 (which can be electrically connected to a computer) so as to record and analyze the stress change of the stretcher 120.

As an alternative embodiment, fifth rope 270 is connected to bearing shaft 310, and strap 220 is sleeved on bearing shaft 310.

In this embodiment, the binding belt 220 may be divided into several strands and sleeved on the bearing shaft 310, and then the tension of the fifth pull rope 270 is borne by the bearing shaft 310, so that the binding belt 220 is uniformly stressed, the risk of breaking the binding belt due to the concentrated tension acting on the single strand of binding belt 220 is avoided, and the safety is improved.

As an alternative embodiment, the fixing plate 140 is provided with a through hole 141, and the through hole 141 is used for the pull gauge 280 and the sixth pull gauge 290 to pass through, so that when real-time measurement data is performed through the sixth pull gauge 290 and the pull gauge 280, the sixth pull gauge 290 and the pull gauge 280 can gradually move through the through hole 141 to avoid interference.

It should be noted that, the first pull cord 170, the second pull cord 210, the third pull cord 230, the fourth pull cord 250, the fifth pull cord 270, and the sixth pull cord 290 may all be steel wire ropes, so as to meet the use requirement.

As an alternative embodiment, two sets of fixing mechanisms 320 are disposed on the platform base 110, the two sets of fixing mechanisms 320 are used for fixing the front end and the rear end of the stretcher 120 respectively, the fixing mechanisms 320 include a fixing seat 321 connected to the platform base 110, and multiple sets of fastening bolts 322 penetrating through and connecting the stretcher 120 are disposed on the fixing seat 321.

In this embodiment, when the stretcher 120 is fixed to the platform base 110, in order to improve the stability of the fixation, the front end and the rear end of the stretcher 120 are also fixed by the fixing mechanism 320, and when the stretcher 120 is fixed, the fastening bolt 322 penetrates through the skeleton of the stretcher 120 (the skeleton is provided with a through hole matched with the fastening bolt 322) to fix, so as to ensure the reliability and stability when the tensile test is performed.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims

1. The utility model provides a stretcher stress testing arrangement, its characterized in that, includes the platform base, the platform base is used for fixed stretcher, be provided with the frame on the platform base, the frame is close to one side of stretcher is provided with the fixed plate, be provided with multiunit high differential first fixed pulley on the fixed plate, multiunit the height of first fixed pulley is all higher than the stretcher, the top sets up multiunit second fixed pulley in the frame, first fixed pulley with wind first stay cord between the second fixed pulley, first stay cord is walked around the one end of first fixed pulley is used for connecting the stretcher, first stay cord is walked around the other end of second fixed pulley is used for connecting the balancing weight.

2. The stretcher stress testing device according to claim 1, wherein the first fixed pulleys are connected with pulley frames, the pulley frames are detachably connected to the fixed plate, and the height of the pulley frames on the fixed plate is adjustable.

3. The stretcher stress testing device according to claim 1, wherein a plurality of groups of third fixed pulleys are further arranged on the platform base, the third fixed pulleys are located between the stretcher and the fixed plate, a second pull rope is wound between the third fixed pulleys and the second fixed pulleys, one end of the second pull rope, which winds around the third fixed pulleys, is used for horizontally connecting the stretcher, and the other end, which winds around the second fixed pulleys, is used for connecting a balancing weight.

4. A stretcher stress testing device according to claim 1, characterised in that the stretcher is provided with a strap for binding the stretcher.

5. The stretcher stress testing device according to claim 4, wherein a third pull rope is connected to the top in the frame, a movable pulley is wound on the third pull rope, the other end of the third pull rope bypasses the second fixed pulley and is connected with a balancing weight, a fourth pull rope is connected to the bottom of the movable pulley, a fourth fixed pulley located between the stretcher and the fixed plate is arranged on the platform base, and the fourth pull rope bypasses the fourth fixed pulley and is horizontally connected to the binding belt.

6. The stretcher stress testing device according to claim 4 or 5, further comprising a fifth pulling rope for connection with the binding belt, the fifth pulling rope being connected with a tension meter, the tension meter being connected with a sixth pulling rope at the other end.

7. The stretcher stress testing device according to claim 6, wherein the fifth pull rope is connected with a bearing shaft, and the binding belt is sleeved on the bearing shaft.

8. The stretcher stress testing device according to claim 6, wherein the fixing plate is provided with a through hole, and the through hole is used for the passage of the tension meter and the sixth pull rope.

9. The stretcher stress testing device according to claim 1, wherein two groups of fixing mechanisms are arranged on the platform base, and the two groups of fixing mechanisms are used for fixing the front end and the rear end of the stretcher respectively.

10. The stretcher stress testing device according to claim 9, wherein said fixing means comprises a fixing base connected to said platform base, and a plurality of groups of fastening bolts penetrating through said stretcher are provided on said fixing base.