Simple sickbed fatigue test device based on gravity loading mode

Abstract

The utility model discloses a simple sickbed fatigue test device based on a gravity loading mode, and relates to the technical field of load fatigue tests. Comprising a main body bracket, a vertical tension guide pulley block and a horizontal tension guide pulley block which are arranged on the main body bracket, a balancing weight, an electric lifting platform which supports the balancing weight and can control the balancing weight to lift, and a traction rope, one end of the traction rope is connected to the balancing weight, and the other end of the traction rope is connected to a sickbed to be tested, so that the traction rope generates traction force on the sickbed to be tested under the balance weight of the balancing weight; when the traction rope is carried on the vertical tension guide pulley block, the traction rope generates vertical upward tension on a sickbed to be tested under the counterweight of the counterweight block; when the pulling rope is carried on the horizontal pulling force guide pulley block, the pulling rope generates pulling force on the sickbed to be tested in the horizontal direction under the balance weight of the balancing weight.

Description

Technical Field

[0001] The utility model relates to the technical field of load fatigue test, in particular to a simple device for the fatigue test of a hospital bed based on the gravity loading method. Background Technique

[0002] According to the inspection requirements of YY 9706.252-2021 "Medical Electrical Equipment Part 2-52: Special Requirements for the Basic Safety and Basic Performance of Medical Hospital Beds", an external force of 1350 N needs to be applied to each position of the hospital bed.

[0003] The existing power loading device uses a push rod motor and a spring to apply an external force, and uses a dynamometer to control the magnitude of the applied force. During the process of applying the force, the overall frame of the device is subject to a reaction force, which is prone to wear, and the worn frame is not easy to replace. At the same time, the power device needs to straddle both sides of the hospital bed for loading, and its size is at least wider than the hospital bed, which has requirements for the installation space. In order to improve the above situation, a simple device for the fatigue test of a hospital bed based on the gravity loading method needs to be designed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a simple device for the fatigue test of a hospital bed based on the gravity loading method to solve the above problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] The simple device for the fatigue test of a hospital bed based on the gravity loading method of the utility model includes a main body bracket, a vertical tension guiding pulley set and a horizontal tension guiding pulley set arranged on the main body bracket, a counterweight, an electric lifting platform for supporting the counterweight and capable of controlling the lifting of the counterweight, and a traction rope;

[0007] One end of the traction rope is connected to the counterweight, and the other end is connected to the hospital bed to be tested, so that the traction rope generates a traction force on the hospital bed to be tested under the counterweight of the counterweight;

[0008] Wherein, when the traction rope is carried on the vertical tension guiding pulley set, the traction rope generates a vertically upward pulling force on the hospital bed to be tested under the counterweight of the counterweight; when the traction rope is carried on the horizontal tension guiding pulley set, the traction rope generates a horizontally directed pulling force on the hospital bed to be tested under the counterweight of the counterweight.

[0009] Further, the main body bracket includes a main support frame, a balance bracket is arranged at the lower end of the main support frame to support the main support frame to keep it in a vertical state, a cross beam at the upper end of the main support frame is used to carry the vertical tension guiding pulley set, and a support cross beam is arranged at the middle part of the main support frame to carry the horizontal tension guiding pulley set.

[0010] Further, the vertical tension guiding pulley set includes a triangular bracket, the lower end of the triangular bracket is a horizontal beam structure, and the middle part of the top end of the triangular bracket is mounted on the middle part of the cross beam at the upper end of the main support frame.

[0011] A first pulley is arranged below the horizontal beam structure at the lower end of the triangular bracket, and two groups of the first pulleys are arranged at both ends of the horizontal beam structure at the lower end of the triangular bracket.

[0012] Further, both ends of the towing rope are respectively mounted on the two groups of the first pulleys and extend vertically downward, and both ends of the towing rope bypassing the first pulley are respectively connected to the counterweight and the test bed.

[0013] Further, the horizontal tension guiding pulley set includes multiple groups of second pulleys arranged on the lower surface of the support cross beam, and the multiple groups of second pulleys are arranged along the horizontal extension direction of the support cross beam.

[0014] Further, the towing rope is mounted on any one of the second pulleys, and one end of the towing rope bypassing the second pulley extends vertically downward and is connected to the counterweight, and the other end extends horizontally and is connected to the test bed.

[0015] In the above technical solution, the simple device for the fatigue test of the hospital bed based on the gravity loading method provided by the present utility model has the following beneficial effects:

[0016] The simple fatigue test device designed by this device uses the gravity of the counterweight 1 to provide the pulling force for the test hospital bed, and applies the gravity to each position of the hospital bed through pulleys and towing ropes. The main worn parts are the pulleys and the towing ropes, which are easy to replace and have low cost. Moreover, the structure design of this device enables it to be moved to the side of the hospital bed without requirements for the installation space. This device replaces the common power-type device at present, and solves the disadvantages of large occupied space and serious mechanical wear. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the simple device for the fatigue test of the hospital bed based on the gravity loading method provided by the embodiment of the present utility model;

[0019] Figure 2Schematic diagram of the working state of the vertical tension guiding pulley group of the simple device for fatigue test of hospital beds based on gravity loading method provided by the embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the working state of the horizontal tension guiding pulley group of the simple device for fatigue test of hospital beds based on gravity loading method provided by the embodiment of the present invention.

[0021] Explanation of reference numerals:

[0022] 1. Counterweight; 2. Electric lifting table; 3. Towing rope; 4. Main support frame; 5. Balance bracket; 6. Support crossbeam; 7. Triangular bracket; 8. First pulley; 9. Second pulley. Specific implementation manners

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Please refer to Figures 1 - 3 , a simple device for fatigue test of hospital beds based on gravity loading method, including a main body bracket, a vertical tension guiding pulley group and a horizontal tension guiding pulley group arranged on the main body bracket, a counterweight 1, an electric lifting table 2 for supporting the counterweight 1 and capable of controlling the lifting of the counterweight 1, and a towing rope 3;

[0025] One end of the towing rope 3 is connected to the counterweight 1, and the other end is connected to the hospital bed to be tested, so that the towing rope 3 generates a traction force on the hospital bed to be tested under the counterweight of the counterweight 1. This traction force forms the tensile force for the fatigue test of each part of the hospital bed. This form uses the gravity of the counterweight 1 to provide the tensile force for the tested hospital bed, replacing the common power-driven devices at present, and solving the disadvantages of large occupied space and serious mechanical wear;

[0026] Among them, when the towing rope 3 is carried on the vertical tension guiding pulley group, the towing rope 3 generates a vertically upward tensile force on the hospital bed to be tested under the counterweight of the counterweight 1; when the towing rope 3 is carried on the horizontal tension guiding pulley group, the towing rope 3 generates a horizontally directed tensile force on the hospital bed to be tested under the counterweight of the counterweight 1.

[0027] Specifically, when in use, first connect the counterweight 1 and the test bed according to the requirement of the pulling force direction; then control the electric lifting platform 2 to rise to lift the counterweight 1. At this time, the counterweight 1 is supported and no pulling force acts on the test bed; then control the electric lifting platform 2 to lower and no longer support the counterweight 1. At this time, the counterweight 1 is suspended and the pulling force acts on the test bed; then raise and lower the electric lifting platform 2 repeatedly to achieve the effect of repeatedly pulling the test bed and complete the load fatigue test of the test bed. The electric lifting platform 2 can achieve timed repeated movement and counting of the number of repeated movements through conventional electrical control components (time relays, calculators) in the prior art, achieving semi-automatic working control. The electrical control means of the electric lifting platform 2 are common knowledge and will not be elaborated here.

[0028] Furthermore, the main body support includes a main support frame 4, which is the main support structure of this device and needs to be able to bear the weight of the counterweight 1. A balance support 5 is provided at the lower end of the main support frame 4 to support the main support frame 4 to keep it vertical. And in order to keep the main support frame 4 balanced when loading the counterweight 1, it can be further fixed by setting long nails that can be nailed into the ground on the balance support 5. The cross beam at the upper end of the main support frame 4 is used to carry the vertical pulling force guiding pulley set, and a support cross beam 6 is provided in the middle part of the main support frame 4 to carry the horizontal pulling force guiding pulley set. It should be explained that based on the height of the test bed, the height of the horizontal pulling force acting on the test bed is generally also determined based on the height of the test bed. Therefore, the horizontal pulling force guiding pulley set is set in the middle part of the main support frame 4 to be able to provide a horizontal pulling force for the test bed.

[0029] Furthermore, the vertical pulling force guiding pulley set includes a triangular support 7. The lower end of the triangular support 7 is a horizontal cross beam structure. The middle part of the top end of the triangular support 7 is mounted on the middle part of the cross beam at the upper end of the main support frame 4 to stably and balancedly support the triangular support 7;

[0030] Below the horizontal cross beam structure at the lower end of the triangular support 7, a first pulley 8 is provided. The first pulley 8 is provided in two groups at both ends of the horizontal cross beam structure at the lower end of the triangular support 7. Thus, when the two ends of the traction rope 3 are connected to the counterweight 1 and the test bed to be tested, the distance between the two groups of first pulleys 8 will also meet the design of the distance between the counterweight 1 and the test bed to be tested.

[0031] Furthermore, the two ends of the traction rope 3 are respectively mounted on the two groups of first pulleys 8 and extend vertically downward. And the two ends of the traction rope 3 bypassing the first pulley 8 are respectively connected to the counterweight 1 and the test bed to be tested. When the first pulley 8 mounts the traction rope 3, the traction rope 3 can move with the gravity of the counterweight 1 to be able to provide a vertically upward pulling force for the test bed.

[0032] Further, the horizontal tension guiding pulley set includes multiple groups of second pulleys 9 arranged on the lower surface of the support crossbeam 6, and the multiple groups of second pulleys 9 are arranged along the horizontal extension direction of the support crossbeam 6.

[0033] Further, the towing rope 3 is mounted on any one group of the second pulleys 9, and one end of the towing rope 3 that bypasses the second pulley 9 extends vertically downward and is connected to the counterweight 1, and the other end extends horizontally and is connected to the test hospital bed to be tested. When the second pulley 9 mounts the towing rope 3, the towing rope 3 can move with the gravity of the counterweight 1, so as to provide a horizontal pulling force for the hospital bed.

[0034] More specifically, when the horizontal tension guiding pulley set is in use, according to the requirement of the pulling force magnitude, if the hospital bed is on one side of the main support frame 4, then the counterweight 1 needs to be arranged on the side opposite to the hospital bed, and a group of the second pulleys 9 close to the counterweight 1 is selected to mount the towing rope 3, so that better conditions for balanced support can be provided for the main support, and the device is more stable when in use.

[0035] In summary, for the simple fatigue test device designed by the present device, the gravity of the counterweight 1 is used to provide the pulling force for the test hospital bed, and the gravity acts on each position of the hospital bed through pulleys and towing ropes. The main worn parts are the pulleys and the towing ropes, and these parts are easy to replace and have low costs. Moreover, the structure design of the present device enables it to be moved beside the hospital bed, and there is no requirement for the installation space. The present device replaces the common power-driven devices at present and solves the disadvantages of large occupied space and serious mechanical wear.

[0036] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. A simple device for the fatigue test of a hospital bed based on a gravity loading method, characterized in that It includes a main body bracket, a vertical tension guiding pulley set and a horizontal tension guiding pulley set arranged on the main body bracket, a counterweight block (1), an electric lifting platform (2) for supporting the counterweight block (1) and capable of controlling the lifting of the counterweight block (1), and a traction rope (3); One end of the traction rope (3) is connected to the counterweight block (1), and the other end is connected to the test bed to generate a traction force on the test bed under the weight of the counterweight block (1); Wherein, when the traction rope (3) is mounted on the vertical tension guiding pulley set, a vertically upward tension of the traction rope (3) on the test bed is generated under the weight of the counterweight block (1); when the traction rope (3) is mounted on the horizontal tension guiding pulley set, a horizontally directed tension of the traction rope (3) on the test bed is generated under the weight of the counterweight block (1).

2. The simple device for fatigue test of a hospital bed based on the gravity loading method according to claim 1, wherein, The main body bracket includes a main support frame (4). A balance bracket (5) is arranged at the lower end of the main support frame (4) to support the main support frame (4) to keep it in a vertical state. The upper cross beam of the main support frame (4) is used to mount the vertical tension guiding pulley set, and a support cross beam (6) is arranged at the middle part of the main support frame (4) to mount the horizontal tension guiding pulley set.

3. The simple device for fatigue test of a hospital bed based on the gravity loading method according to claim 2, characterized in that, The vertical tension guiding pulley set includes a triangular bracket (7). The lower end of the triangular bracket (7) is a horizontal cross beam structure, and the middle part of the top end of the triangular bracket (7) is hung and installed at the middle part of the upper cross beam of the main support frame (4); Two groups of first pulleys (8) are arranged at both ends of the horizontal cross beam structure at the lower end of the triangular bracket (7); 4. The simple device for fatigue test of a hospital bed based on the gravity loading method according to claim 3, characterized in that Both ends of the traction rope (3) are respectively mounted on the two groups of first pulleys (8) and extend vertically downward, and the two ends of the traction rope (3) bypassing the first pulleys (8) are respectively connected to the counterweight block (1) and the test bed.

5. The simple device for fatigue test of a hospital bed based on the gravity loading method according to claim 2, characterized in that, The horizontal tension guiding pulley set includes multiple groups of second pulleys (9) arranged on the lower surface of the support cross beam (6), and the multiple groups of second pulleys (9) are arranged along the horizontal extension direction of the support cross beam (6).

6. The simple device for fatigue test of a hospital bed based on the gravity loading method according to claim 5, characterized in that, The traction rope (3) is mounted on any one of the second pulleys (9), and one end of the traction rope (3) bypassing the second pulley (9) extends vertically downward and is connected to the counterweight block (1), and the other end extends horizontally and is connected to the test bed.

Images