A wheelchair securement pull durability test device

Abstract

The utility model discloses a kind of stretcher durability testing devices for wheelchair fixing device, including support frame, fixed seat is provided on the support frame, the fixed seat one end is formed with the installation site for fixing the stretcher of wheelchair, the other end is provided with stretching mechanism, the stretching mechanism front end can be stretched test to safety belt after being connected with the safety belt of the stretcher of wheelchair belongs to;Still including a control system, the length, rate and cycle number of safety belt stretching can be set by the control system.The utility model realizes the automatic stretching durability test to be the stretcher of wheelchair, greatly shorten test time, reduce cost while, ensure that test result is accurate and reliable.

Description

Technical Field

[0001] This utility model belongs to the field of tensile testing technology, and more specifically, relates to a tensile durability testing device for wheelchair fixation. Background Technology

[0002] To ensure the safety, durability, and compliance with industry standards and regulations in the production of wheelchairs, tensile durability tests are required on the fixation devices. This allows for the timely identification and resolution of problems in the design and manufacturing process of the wheelchair fixation retraction mechanism, thereby improving the overall quality and reliability of the wheelchair fixation devices.

[0003] Traditional methods for testing the tensile durability of wheelchair restraints often rely on prolonged actual use or specialized equipment to complete the test. The former is time-consuming, labor-intensive, and difficult to guarantee the accuracy of the test, while the latter is expensive and the tensile stroke is limited by the size of the equipment. Therefore, it is necessary to design a tensile durability testing device for wheelchair restraints to effectively solve the above-mentioned technical problems. Utility Model Content

[0004] In order to solve the problems existing in the prior art, this utility model aims to provide a tensile durability testing device for wheelchair fixation, so as to achieve rapid and accurate tensile durability testing of wheelchair fixation while reducing testing costs.

[0005] To achieve the above-mentioned technical objectives and effects, this utility model is implemented through the following technical solution:

[0006] A wheelchair restraint tensile durability testing device includes a support frame with a fixing seat on the support frame. One end of the fixing seat has a mounting position for fixing the wheelchair restraint, and the other end has a tensioning mechanism. The front end of the tensioning mechanism is connected to the seat belt of the wheelchair restraint to perform a tensile test on the seat belt. The device also includes a control system that can set the length, rate, and number of cycles of the seat belt tensioning.

[0007] Furthermore, the support frame is composed of multiple connecting rods spliced ​​together to form a box shape.

[0008] Furthermore, the fixing base includes at least two parallel support rods, one end of which is provided with a first mounting seat to form a mounting position for fixing the wheelchair fixation device, and the other end is provided with a second mounting seat for mounting the tensioning mechanism.

[0009] Furthermore, the tensioning mechanism includes a cylinder, a support for fixing the cylinder body at its front end, and a connecting plate at the front end of the cylinder piston rod, the connecting plate being provided with a connecting assembly for connecting with the seat belt.

[0010] Furthermore, the connecting plate is also provided with at least two sets of guide shafts, which slide through the support.

[0011] Furthermore, the connection assembly includes a connection frame mounted on the connection plate, and the connection frame is provided with a hook for connecting to the seat belt.

[0012] Furthermore, the control system includes a controller, two sets of magnetic switches and a solenoid valve, wherein the magnetic switches and the solenoid valve are respectively electrically connected to the controller.

[0013] The beneficial effects of this utility model are as follows: This utility model realizes automatic tensile durability testing of wheelchair fixation devices, which greatly shortens the testing time, reduces costs, and ensures accurate and reliable test results.

[0014] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2 This is a partial structural diagram of the device of this utility model;

[0018] Figure 3 This is a schematic diagram of the connecting component structure of this utility model.

[0019] The following are the labels in the diagram: 1. Support frame; 2. Fixed seat; 3. Tensioning mechanism; 4. Control system; 21. Support rod; 22. First mounting seat; 23. Second mounting seat; 31. Cylinder; 32. Support; 33. Connecting plate; 34. Connecting assembly; 35. Guide shaft; 341. Connecting bracket; 342. Hook; 3411. Lifting ring; 3412. Bolt; 3413. First nut; 3414. Second nut; 41. Controller; 42. Magnetic switch; 43. Solenoid valve. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, upper end, lower end, top, bottom, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0022] See Figure 1 As shown (A in the figure represents a wheelchair restraint), a tensile durability testing device for a wheelchair restraint includes a support frame 1, which is assembled from multiple connecting rods to form a box shape; a fixing seat 2 is provided on the support frame 1, one end of the fixing seat 2 forms an installation position for fixing the wheelchair restraint, and the other end is provided with a tensioning mechanism 3. The front end of the tensioning mechanism 3 is connected to the seat belt to which the wheelchair restraint belongs, so that the seat belt can be subjected to a tensile test; it also includes a control system 4, through which the length, rate and number of cycles of the seat belt tensioning can be set.

[0023] Further details can be found by referring to [link / reference]. Figure 1 As shown, the fixing base 2 includes two parallel support rods 21, but is not limited to two; more can be provided depending on the actual setup. One end of each support rod 21 is provided with a first mounting base 22, forming a mounting position for fixing the wheelchair fixation device, and the other end is provided with a second mounting base 23, for mounting the tensioning mechanism 3. During testing, after the safety belt of the wheelchair fixation device is connected to the tensioning mechanism 3, the tensioning mechanism 3 automatically stretches the safety belt back and forth, thereby achieving a tensile durability test on the safety belt.

[0024] Among them, see Figure 2 As shown, in this embodiment, the tensioning mechanism 3 includes a cylinder 31, a support 32 for fixing the cylinder 31 body at its front end, and a connecting plate 33 at the front end of the piston rod of the cylinder 31. The connecting plate 33 is provided with a connecting component 34 for connecting with the seat belt. During testing, after the seat belt is connected to the connecting component 34, the piston rod of the cylinder 31 extends and retracts to drive the connecting plate 33 to move back and forth, thereby driving the connecting component 34 to move back and forth, and thus realizing the tensile durability test of the seat belt.

[0025] In this embodiment, to ensure the motion stability of the connecting plate 33 and the axial transmission accuracy of the test load during the test, two sets of guide shafts 35 are also provided on the connecting plate 33. The direction of the guide shafts 35 is parallel to the extension and retraction direction of the cylinder 31, and the guide shafts 35 can slide through the support 32. The sliding cooperation between the guide shafts 35 and the support 32 forms a double axial constraint, which effectively counteracts the radial off-center load of the cylinder piston rod, prevents the connecting plate 33 from twisting or shifting, and thus ensures that the tension direction of the seat belt always coincides with the axis of the cylinder 31, improving the repeatability and accuracy of the test results. It should be noted that the number of sets of guide shafts 35 is only one implementation method and is not intended to limit the scope of this application. In actual settings, more sets can be set, depending on the actual configuration.

[0026] In this embodiment, see Figure 3 As shown, the connecting assembly 34 includes a connecting frame 341 mounted on the connecting plate 33 and a hook 342; wherein, the connecting frame 341 includes a pair of spaced-apart rings 3411, and a bolt 3412 is provided between the rings 3411. The bolt 3412 is locked between the pair of rings 3411 by a first nut 3413. At this time, two sets of second nuts 3414 are screwed onto the bolt 3412 located between the pair of rings 3411; during installation, one end of the hook 342 is sleeved on the bolt 3412 and then locked on the bolt 3412 by the second nut 3414; and the installation strap is connected to the other end of the hook 342; in addition, it should be noted that, in order to facilitate the connection of the safety belt, in this embodiment, the hook 342 is a carabiner.

[0027] Further, see Figure 1 As shown, in this embodiment, the control system 4 includes a controller 41, two sets of magnetic switches 42, and a solenoid valve 43. The magnetic switches 42 and the solenoid valve 43 are electrically connected to the controller 41. During installation, the magnetic switches 42 are located at the front and rear ends of the outer surface of the cylinder 31, and the extension and retraction length of the piston rod of the cylinder 31 is controlled by the magnetic switches 42. The solenoid valve 43 is connected to the cylinder 31 through a corresponding air pipe, and then connected to an external air supply device through a corresponding air pipe. The controller 41 controls the on / off state, the number of on / off cycles, and the valve opening degree of the solenoid valve 43, thereby controlling the extension and retraction rate and the number of extension and retraction cycles of the cylinder 31. This enables precise control of the tension length, tension rate, and number of tension cycles of the seat belt, ensuring the accuracy of the tensile durability test.

[0028] The working principle of this utility model is as follows:

[0029] Before testing the wheelchair restraint, connect it to the external air supply device via the corresponding air tube; and after installing the wheelchair restraint on the first mounting base 22, connect the safety belt to the hook 342.

[0030] When testing wheelchair restraints, the device is activated after the tension length, speed and number of cycles are set by the controller 41. At this time, the cylinder 31 pulls the seat belt back and forth to automatically perform a tensile durability test on the seat belt.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A securement stretcher durability testing device for wheelchairs, characterized by: The device includes a support frame (1), on which a fixing seat (2) is provided. One end of the fixing seat (2) is formed with a mounting position for fixing a wheelchair restraint, and the other end is provided with a tensioning mechanism (3). The front end of the tensioning mechanism (3) is connected to the seat belt to which the wheelchair restraint belongs, so that the seat belt can be subjected to a tension test. The device also includes a control system (4), through which the length, speed and number of cycles of the seat belt tensioning can be set.

2. The securement stretcher durability testing device for a wheelchair according to claim 1, characterized by: The support frame (1) is composed of multiple connecting rods spliced ​​together to form a box shape.

3. The securement stretcher durability testing device for a wheelchair according to claim 1, characterized by: The fixing base (2) includes at least two parallel support rods (21). One end of the support rod (21) is provided with a first mounting base (22) to form a mounting position for fixing the wheelchair fixation device, and the other end is provided with a second mounting base (23) for mounting the tensioning mechanism (3).

4. The securement stretcher durability testing device for a wheelchair according to claim 1, characterized by: The tensioning mechanism (3) includes a cylinder (31), a support (32) for fixing the cylinder (31) body is provided at the front end, and a connecting plate (33) is provided at the front end of the piston rod of the cylinder (31), and a connecting assembly (34) for connecting with the seat belt is provided on the connecting plate (33).

5. The securement stretcher durability testing device for a wheelchair according to claim 4, characterized by: The connecting plate (33) is also provided with at least two sets of guide shafts (35), which slide through the support (32).

6. The securement stretcher durability testing device for a wheelchair according to claim 4, characterized by: The connecting assembly (34) includes a connecting bracket (341) mounted on the connecting plate (33), and the connecting bracket (341) is provided with a hook (342) for connecting with a seat belt.

7. The securement stretcher durability testing device for a wheelchair according to claim 1, characterized by: The control system (4) includes a controller (41), two sets of magnetic switches (42) and a solenoid valve (43), wherein the magnetic switches (42) and the solenoid valve (43) are electrically connected to the controller (41).

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