Life testing device for rocking handle system for sickbed

Abstract

The utility model belongs to the technical field of folding cranks, and particularly relates to a sickbed cranking handle system service life testing device, which comprises a cranking handle shell, two groups of pin holes are arranged on the outer surface of the cranking handle shell, a cranking handle hinged support is assembled between the two groups of pin holes through cylindrical pins, and a rotary cranking handle is mounted on the cranking handle hinged support. A first bowl-shaped elastic pad is installed between the rotating crank handle and the crank handle hinge seat, the outer surface of the cylindrical pin is sleeved with a second bowl-shaped elastic pad, a crank handle spring piece is installed on the crank handle shell through a first fixing screw, and the top of the crank handle spring piece abuts against the crank handle hinge seat. The folding handle is convenient to assemble, store and fold, and the service life detection device for the folding handle of the sickbed can realize batch service life detection of a plurality of groups of handles.

Description

Technical Field

[0001] The utility model relates to the technical field of foldable crank arms, in particular to a life test device for a crank arm system for a sickbed. Background Art

[0002] The folding crank handle of the hospital bed is a common accessory on the hospital bed, usually installed at the head of the bed. When the angle of the bed back panel needs to be adjusted, the medical staff can hold the folding crank handle to flip the bed back panel.

[0003] Foldable bed cranks with elastic reset are widely used as a standard configuration on hospital beds. The alloy spring sheet of the crank will be subjected to high-frequency bending during use. In order to develop a long-life crank, a special device must be used to quickly test the crank system of the hospital bed in batches. The existing folding cranks of the hospital beds are not easy to assemble. In order to solve the life test of the crank spring sheet, a professional testing device is designed and developed, which will provide technical guarantee for the rapid and standardized testing of long-life cranks and facilitate the assembly of folding cranks of the hospital beds. We propose a life test device for the crank system of the hospital bed. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the utility model provides a life test device for a crank system for a hospital bed. This technology solves the life test problem of a folding crank for a hospital bed and develops a special device. It realizes rapid standardized testing of the folding crank, and is for the development and testing of the long-life springs of the modified crank and subsequent sampling. The folding crank of the hospital bed is easy to assemble, solving the background problem.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A life test device for a crank arm system for a hospital bed comprises an crank arm body and a testing machine, wherein the crank arm body comprises an crank arm shell, the outer surface of the crank arm shell is provided with two groups of pin holes, a crank arm hinge seat is assembled between the two groups of pin holes via a cylindrical pin, a rotating crank handle is mounted on the crank arm hinge seat, a first bowl-shaped spring washer is mounted between the rotating crank handle and the crank arm hinge seat, a second bowl-shaped spring washer is sleeved on the outer surface of the cylindrical pin, a crank arm spring sheet is mounted on the crank arm shell via a first fixing screw, and the top of the crank arm spring sheet abuts against the crank arm hinge seat.

[0007] Preferably, a rotating shaft mounting hole is provided on the handle housing.

[0008] Preferably, the testing machine includes a shell component, a plurality of crank arm positioning blocks are installed on the shell component by a second fixing screw, adjacent crank arm positioning blocks are formed with crank arm positioning grooves, a crank arm body is clamped inside the crank arm positioning grooves, a fiber optic probe mounting plate is installed on the shell component by mounting screws, a plurality of fiber optic probes are fixedly installed on the fiber optic probe mounting plate, a fiber optic signal controller is installed on the shell component, a plurality of cylinder tail seats are fixedly installed on the shell component, a stainless steel cylinder is hingedly installed on the cylinder tail seat, an output end of the stainless steel cylinder is fixedly connected with a Y-shaped joint, an electrical box panel is installed on the shell component by connecting screws, a plurality of control knobs and a main controller are installed on the electrical box panel.

[0009] Preferably, the air inlet and outlet ends of the stainless steel cylinder are connected to a valve island, the air inlet end of the valve island is connected to a pneumatic triplet, and the air inlet end of the pneumatic triplet is connected to an air source.

[0010] Preferably, an electrical box cable duct is installed on the outer shell component.

[0011] Preferably, a plurality of universal casters are installed at the bottom of the shell component.

[0012] Preferably, the shell component is provided with a plurality of wire holes.

[0013] Preferably, the master controller is respectively connected to the signal end of the valve island, the signal end of the pneumatic triplet and the signal end of the optical fiber signal controller through wires, and the optical fiber signal controller is electrically connected to the optical fiber probe through wires.

[0014] Preferably, a position sensor and a throttle valve are installed on the stainless steel cylinder.

[0015] Preferably, the housing component is made of stainless steel.

[0016] Beneficial Effects

[0017] The utility model provides a life test device for a crank system of a hospital bed. Compared with the prior art, it has the following beneficial effects:

[0018] 1. The foldable crank arm of the hospital bed and the life test device thereof are assembled by a first bowl-shaped spring washer, a crank arm hinge seat, a rotating crank handle, a second bowl-shaped spring washer, a crank arm spring sheet, a first fixing screw, and a cylindrical pin, so that the foldable crank arm is easy to assemble and install and is convenient to retract and fold.

[0019] 2. The life test device of the arm system of the hospital bed. The life detection device of the folding arm of the hospital bed can realize batch life detection of multiple groups of arm. The optical fiber probe can monitor in real time whether the arm spring piece is seriously failed or broken. The detection is fast, which greatly shortens the product life detection cycle. The speed is increased by 10-20 times compared with manual detection. In addition, the sending and receiving force and speed of the stainless steel cylinder are almost the same during the detection, which ensures the accuracy of the detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the folding handle structure of the hospital bed of the utility model;

[0021] Figure 2 This is a schematic diagram of the disassembly structure of the folding handle of the hospital bed of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the folding handle of the hospital bed of the utility model in the use state;

[0023] Figure 4 This is a schematic diagram of the structure of a device for testing the life of a folding handle of a hospital bed according to the utility model;

[0024] Figure 5 It is a side view structural diagram of the folding handle life test device for hospital beds of the utility model;

[0025] Figure 6 It is a schematic diagram of the disassembled structure of the folding crank life test device for hospital bed of the utility model.

[0026] In the figure: 1. first bowl-shaped spring washer; 2. crank handle hinge seat; 3. rotating crank handle; 4. second bowl-shaped spring washer; 5. crank handle spring sheet; 6. first fixing screw; 7. cylindrical pin; 8. crank handle housing; 9. rotating shaft mounting hole; 10. main controller; 11. electrical box panel; 12. control knob; 13. housing member; 14. universal caster; 15. optical fiber signal controller; 16. optical fiber probe; 17. optical fiber probe mounting plate; 18. crank handle body; 19. Y-shaped connector; 20. cylinder tail seat; 21. pneumatic triplex; 22. valve island; 23. electrical box wire trough; 24. second fixing screw; 25. crank handle positioning block; 26. wire hole; 27. stainless steel cylinder. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1-6 The utility model provides a technical solution: a life test device for a crank system for a hospital bed, comprising a crank body and a test machine, the crank body consisting of a crank shell 8, the outer surface of the crank shell 8 is provided with two groups of pin holes, a crank hinge seat 2 is assembled between the two groups of pin holes through a cylindrical pin 7, a rotating crank handle 3 is installed on the crank hinge seat 2, a first bowl-shaped spring washer 1 is installed between the rotating crank handle 3 and the crank hinge seat 2, a second bowl-shaped spring washer 4 is sleeved on the outer surface of the cylindrical pin 7, a crank spring sheet 5 is installed on the crank shell 8 through a first fixing screw 6, the top of the crank spring sheet 5 is in contact with the crank hinge seat 2, and a rotating shaft mounting hole 9 is opened on the crank shell 8.

[0029] When in use, the foldable rocker arm can be conveniently installed on the armrest of the bed through the rotating shaft mounting hole 9. When assembled, the rotating rocker handle 3 is assembled on the rocker arm hinge seat 2, and the rod portion of the rotating rocker handle 3 is fixed by the first bowl-shaped spring pad 1, and then the rocker arm hinge seat 2 is assembled between the two groups of pin holes on the rocker arm shell 8, and then the cylindrical pin 7 is inserted between the rocker arm shell 8 and the rocker arm hinge seat 2, and then the second bowl-shaped spring pad 4 is sleeved on the outside of the cylindrical pin 7, and the second bowl-shaped spring sheet 4 fixes the cylindrical pin 7, and then the rocker arm spring sheet 5 is fixed by the first fixing screw 6. When the rotating crank handle 3 is folded, the top of the crank spring sheet 5 will contact the outer surface of the crank hinge seat 2, thereby realizing assembly. When the rotating crank handle 3 is folded, the rotating crank handle 3 will drive the crank hinge seat 2 to rotate. When the crank hinge seat 2 rotates, the crank spring sheet 5 will bend away from the crank hinge seat 2, and the crank spring sheet 5 will generate elastic force. When the crank hinge seat 2 is released, the crank spring sheet 5 will drive the crank hinge seat 2 to reset. When the rotating crank handle 3 is folded into a vertical state, the crank spring sheet 5 will not bend, and the crank spring sheet 5 can press the crank hinge seat 2 tightly. Figure 1-3 The folding handle of the hospital bed shown is convenient for assembly and installation and is easy to retract and fold.

[0030] The testing machine includes a shell member 13, on which a plurality of crank positioning blocks 25 are installed by second fixing screws 24, adjacent crank positioning blocks 25 are formed with crank positioning grooves, and a crank body 18 is clamped inside the crank positioning grooves, a fiber optic probe mounting plate 17 is installed on the shell member 13 by mounting screws, a plurality of fiber optic probes 16 are fixedly installed on the fiber optic probe mounting plate 17, a fiber optic signal controller 15 is installed on the shell member 13, a plurality of cylinder tail seats 20 are fixedly installed on the shell member 13, a stainless steel cylinder 27 is hingedly installed on the cylinder tail seat 20, and a Y-shaped joint 19 is fixedly connected to the output end of the stainless steel cylinder 27, an electrical box panel 11 is installed on the shell member 13 by connecting screws, a plurality of control knobs 12 and a main controller 10 are installed on the electrical box panel 11, the inlet and outlet ends of the stainless steel cylinder 27 are connected to a valve island 22, the inlet end of the valve island 22 is connected to a pneumatic triplet 21, and the inlet end of the pneumatic triplet 21 is connected to an air source.

[0031] When the folding crank of the hospital bed needs to be tested, the crank body 18 is inserted into the crank positioning groove formed between the adjacent crank positioning blocks 25, and the crank housing 8 is positioned in the crank positioning groove. Then, the rotating crank handle 3 on the crank body 18 is brought into contact with the Y-shaped joint 19. The Y-shaped joint 19 is provided with a plurality of fastening screws, and the fastening screws fix the rotating crank handle 3 and the Y-shaped joint 19. During the test, the stainless steel cylinder 27 is started, and the stainless steel cylinder 27 will drive the rotating crank handle 3 to rotate continuously. When the rotating crank handle 33 rotates continuously, it will continuously drive the crank spring sheet 5 to bend. The pneumatic triplet 21 is used to filter compressed air, adjust the gas supply pressure and add lubricating oil. The valve island 22 switches the stainless steel valve under the control of the master controller 10. The air supply direction of the cylinder 27, the air source is used for air supply, the optical fiber probe 16 is set to output the detection light source, irradiate the crank hand spring piece 5, after reflection, it is fed back to the optical fiber signal controller 15, the optical fiber signal controller 15 transmits the signal to the main controller 10, the optical fiber probe 16 is irradiated on the crank hand spring piece, and real-time monitoring is carried out on whether the crank hand spring piece 5 is seriously failed or broken. When a certain crank hand spring piece 5 fails, the optical fiber probe 16 detects it and feeds back the signal to the optical fiber signal controller 15, the optical fiber signal controller 15 sends the signal to the main controller 10, the main controller 10 will stop the corresponding air valve in the valve island 22, after the air valve stops moving, the corresponding stainless steel cylinder 27 will also stop moving, the failed folding crank will stop the retraction and extension action, and this group of tests will terminate.

[0032] An electric box wire duct 23 is installed on the outer shell member 13, and the electric box wire duct 23 can be used for laying control wires and air pipes.

[0033] A plurality of universal casters 14 are installed at the bottom of the housing member 13, and the universal casters 14 support the machine for easy movement.

[0034] The housing member 13 is provided with a plurality of thread holes 26 for convenient threading.

[0035] The master controller 10 is respectively connected to the signal end of the valve island 22 , the signal end of the pneumatic triplet 21 and the signal end of the optical fiber signal controller 15 via wires, and the optical fiber signal controller 15 is electrically connected to the optical fiber probe 16 via wires.

[0036] A position sensor and a throttle valve are installed on the stainless steel cylinder 27 .

[0037] The stainless steel cylinder 27 is equipped with a position sensor and a precision throttle valve. In conjunction with the monitoring of the main controller 10 and the stable air pressure provided by the pneumatic triplet 21, the throttle valves of each stainless steel cylinder 27 are slowly adjusted to achieve almost consistent folding speed control of multiple groups of cranks, ensure the consistency of the bending force and speed of the crank spring sheet 5 in the crank test, achieve standard testing of the crank life, and provide measurement technology guarantee for the development of long-life cranks.

[0038] The housing member 13 is made of stainless steel.

[0039] Working principle: When assembling the folding crank, the rotating crank handle 3 is assembled to the crank hinge seat 2, and the rod of the rotating crank handle 3 is fixed by the first bowl-shaped spring washer 1, and then the crank hinge seat 2 is assembled between the two groups of pin holes on the crank shell 8, and then the cylindrical pin 7 is inserted between the crank shell 8 and the crank hinge seat 2, and then the second bowl-shaped spring washer 4 is sleeved on the outside of the cylindrical pin 7, and the second bowl-shaped spring sheet 4 fixes the cylindrical pin 7, and then the crank spring sheet 5 is fixed to the rotating crank handle 3 by the first fixing screw 6, and the crank The top of the spring sheet 5 will contact the outer surface of the crank hinge seat 2, thereby realizing assembly. When the crank handle 3 is folded and rotated, the rotating crank handle 3 will drive the crank hinge seat 2 to rotate. When the crank hinge seat 2 rotates, the crank spring sheet 5 will bend away from the crank hinge seat 2, and the crank spring sheet 5 will generate elastic force. When the crank hinge seat 2 is released, the crank spring sheet 5 will drive the crank hinge seat 2 to reset. When the rotating crank handle 3 is folded into a vertical state, the crank spring sheet 5 will not bend, and the crank spring sheet 5 can press the crank hinge seat 2 tightly. Figure 1-3 The folding handle of the hospital bed is convenient for assembly and installation and easy to fold and unfold;

[0040] When the folding crank of the hospital bed needs to be tested, the crank body 18 is inserted into the crank positioning groove formed between the adjacent crank positioning blocks 25, and the crank housing 8 is positioned in the crank positioning groove. Then, the rotating crank handle 3 on the crank body 18 is brought into contact with the Y-shaped joint 19. The Y-shaped joint 19 is provided with a plurality of fastening screws, and the fastening screws fix the rotating crank handle 3 and the Y-shaped joint 19. During the test, the stainless steel cylinder 27 is started, and the stainless steel cylinder 27 will drive the rotating crank handle 3 to rotate continuously. When the rotating crank handle 33 rotates continuously, it will continuously drive the crank spring sheet 5 to bend. The pneumatic triplet 21 is used to filter compressed air, adjust the gas supply pressure and add lubricating oil. The valve island 22 switches the gas supply direction of the stainless steel cylinder 27 under the control of the main controller 10. The gas source is used for gas supply, and the fiber optic probe 16 is set to output a detection light source to illuminate the crank hand spring piece 5. After reflection, the light is fed back to the fiber optic signal controller 15. The fiber optic signal controller 15 transmits the signal to the main controller 10. The fiber optic probe 16 illuminates the crank hand spring piece to monitor in real time whether the crank hand spring piece 5 is seriously failed or broken. When a certain crank hand spring piece 5 fails, the fiber optic probe 16 detects it and feeds back the signal to the fiber optic signal controller 15. The fiber optic signal controller 15 sends a signal to the main controller 10. The main controller 10 stops the corresponding gas valve in the valve island 22. After the gas valve stops moving, the corresponding stainless steel cylinder 27 will also stop moving, and the failed folding crank will stop retracting and extending, and the test of this group will be terminated. This detection device can realize batch life detection of multiple groups of cranks.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A life test device for a crank system for a hospital bed, comprising a crank body and a test machine, characterized in that: The crank body is composed of a crank shell (8), the outer surface of the crank shell (8) is provided with two groups of pin holes, a crank hinge seat (2) is assembled between the two groups of pin holes through a cylindrical pin (7), a rotating crank handle (3) is installed on the crank hinge seat (2), a first bowl-shaped spring washer (1) is installed between the rotating crank handle (3) and the crank hinge seat (2), a second bowl-shaped spring washer (4) is sleeved on the outer surface of the cylindrical pin (7), a crank spring sheet (5) is installed on the crank shell (8) through a first fixing screw (6), and the top of the crank spring sheet (5) is in contact with the crank hinge seat (2).

2. The life test device for the crank system of a hospital bed according to claim 1, characterized in that: The crank housing (8) is provided with a rotating shaft mounting hole (9).

3. The life test device for the crank system of a hospital bed according to claim 2, characterized in that: The testing machine comprises a shell component (13), a plurality of crank positioning blocks (25) are mounted on the shell component (13) via second fixing screws (24), adjacent crank positioning blocks (25) are formed with crank positioning grooves, a crank body (18) is clamped inside the crank positioning grooves, a fiber optic probe mounting plate (17) is mounted on the shell component (13) via mounting screws, a plurality of fiber optic probes (16) are fixedly mounted on the fiber optic probe mounting plate (17), a fiber optic signal controller (15) is mounted on the shell component (13), a plurality of cylinder tail seats (20) are fixedly mounted on the shell component (13), a stainless steel cylinder (27) is hingedly mounted on the cylinder tail seat (20), an output end of the stainless steel cylinder (27) is fixedly connected to a Y-shaped joint (19), an electrical box panel (11) is mounted on the shell component (13) via connecting screws, a plurality of control knobs (12) and a master controller (10) are mounted on the electrical box panel (11).

4. The life test device for the crank system of a hospital bed according to claim 3, characterized in that: The air inlet and outlet ends of the stainless steel cylinder (27) are connected to a valve island (22), the air inlet end of the valve island (22) is connected to a pneumatic triplet (21), and the air inlet end of the pneumatic triplet (21) is connected to an air source.

5. The life test device for the crank system of a hospital bed according to claim 4, characterized in that: An electrical box wire duct (23) is installed on the housing component (13).

6. The life test device for the crank system of a hospital bed according to claim 5, characterized in that: A plurality of universal casters (14) are installed at the bottom of the shell component (13).

7. The life test device for the crank system of a hospital bed according to claim 6, characterized in that: The outer shell component (13) is provided with a plurality of wire holes (26).

8. The life test device for the crank system of a hospital bed according to claim 7, characterized in that: The master controller (10) is respectively connected to the signal end of the valve island (22), the signal end of the pneumatic triplet (21), and the signal end of the optical fiber signal controller (15) via wires, and the optical fiber signal controller (15) is electrically connected to the optical fiber probe (16) via wires.

9. The life test device for the crank system of a hospital bed according to claim 8, characterized in that: A position sensor and a throttle valve are installed on the stainless steel cylinder (27).

10. The life test device for the crank system of a hospital bed according to claim 9, characterized in that: The housing member (13) is made of stainless steel.

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