Track structure embedded into long-side rectangular tube of bed bottom frame

Abstract

The utility model relates to the technical field of nursing beds, in particular to a track structure embedded into rectangular pipes on the long sides of a bed bottom frame, which comprises two rectangular pipes arranged in mirror symmetry, roller shafts are arranged on the two sides of the two rectangular pipes, and wheel sets are rotatably arranged at the two ends of the roller shafts. The inner walls of the two ends of the two rectangular pipes are each provided with a notch for the corresponding roller shaft to slide horizontally, and four filler strips are fixedly arranged on the lower end faces of the inner sides of the rectangular pipes and support the four wheel sets at the ends of the roller shafts. According to the scheme, the notch is cut through laser, and compared with metal plate cutting and bending shaping, the process is lower in difficulty. On one hand, the filler strip can reduce the noise of the wheel set during operation, and on the other hand, the self cost and the processing cost of the material are far lower than those of a thick metal plate, so that the cost can be saved. The forming difficulty of the holes of the filler strips and the auxiliary holes in the rectangular pipe is completely stable, the difficulty of horizontal sheet metal part welding is low, and the subsequent production and machining difficulty is further reduced.

Description

Technical Field

[0001] The present application relates to the technical field of nursing beds, and in particular to a track structure embedded in a long-side rectangular tube of a bed bottom frame. Background Art

[0002] With the continuous development of medical technology, electric lifting beds are increasingly used in the medical field. Figure 1 As shown, the bottom frame structure of an existing parallelogram lift electric hospital bed with slide rails is shown. The slide rails are generally U-shaped sheet metal parts with inward openings welded to the inner side of the long side rectangular tube of the bed bottom frame. This structure requires U-shaped sheet metal parts to be processed and welded, and has certain requirements on the thickness of the sheet metal parts.

[0003] After the sheet metal parts are selected, they need to be molded and bent, and then positioned and welded to the inner side of the rectangular tube. This results in large cumulative deviations, and the additional thicker sheet metal parts required increases material costs, making the overall processing process more complex. In addition, because the bottom of the U-shaped slide rail is suspended in the air, prolonged pressure from above can cause the slide rail to deform, ultimately leading to abnormal noise and obstruction when the bed is raised or lowered, affecting the use of the lift bed. Therefore, to solve the above problems, the present application provides a track structure embedded in the long rectangular tube of the bed frame. Utility Model Content

[0004] In order to solve the problem that the processing technology of the existing lifting bed slide rails is complicated and its suspended structure reduces the service life, the present application provides a track structure embedded in the long side rectangular tube of the bed bottom frame.

[0005] The present application provides a track structure embedded in a rectangular tube on the long side of a bed bottom frame, comprising two rectangular tubes arranged in mirror symmetry, with roller shafts provided on both sides of the two rectangular tubes, and wheel groups rotatably provided at both ends of the roller shafts. The inner walls at both ends of the two rectangular tubes are provided with slots for horizontal sliding of the roller shafts, and four pads are fixedly provided on the lower end surface of the inner side of the rectangular tubes, which support the four wheel groups at the ends of the roller shafts.

[0006] Preferably, the notch is processed by laser cutting.

[0007] Preferably, the rectangular tube is provided with a process hole penetrating the upper and lower end surfaces, and two process holes are provided at both ends of the same notch.

[0008] Preferably, bolts are provided through the process holes, and the bolts also pass through the gasket strips to limit their horizontal positions at both ends.

[0009] Preferably, the horizontal length of the notch is greater than the horizontal movable range of the crossbar.

[0010] Preferably, the horizontal length of the pad is greater than the length of the slot.

[0011] Preferably, the same side ends of the two rectangular tubes are welded under the same crossbar, and universal wheels are installed at both ends of the two crossbars.

[0012] In summary, this application has the following beneficial technical effects:

[0013] The slots are created by laser cutting, and the laser slotting process is less difficult than the sheet metal cutting, bending and shaping processes.

[0014] The spacer strips not only reduce wheel noise during operation, but also offer significant cost savings, as both the material cost and processing costs are significantly lower than those of thick sheet metal. The holes for the spacer strips and the process holes in the rectangular tubes are also much easier to create than welding completely stable and horizontal sheet metal parts, further simplifying subsequent production and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a prior art structure diagram;

[0016] Figure 2 It is an isometric drawing in Example 1 of the present application;

[0017] Figure 3 This is an exploded view of Example 1 of the present application;

[0018] Figure 4 It is a partial perspective view of Example 1 of the present application.

[0019] Explanation of the accompanying reference numerals: 1. rectangular tube; 11. notch; 12. process hole; 2. cross bar; 3. universal wheel; 4. roller shaft; 41. wheel set; 5. slide rail; 6. bolt; 7. gasket. DETAILED DESCRIPTION

[0020] Reference Figure 1 , which is a structural diagram of a lifting bed frame in the prior art. U-shaped slide rails 5 are welded at both ends of the inner side walls of the two rectangular tubes 1, and the wheel sets 41 at both ends of the roller shaft 4 are slidably embedded in the inner side of each slide rail 5 to ensure sliding in the horizontal direction.

[0021] The following is combined with Figure 2 - Figure 4 This application is described in further detail.

[0022] Example 1:

[0023] A track structure embedded in the long side rectangular tube 1 of the bed bottom frame, referring to Figure 2 - Figure 4The invention comprises two mirror-symmetrical rectangular tubes 1, each open at both ends and subsequently sealed with end plugs. The same-side ends of the two rectangular tubes 1 are welded to the bottom of the same crosspiece 2, and universal wheels 3 are installed at both ends of the crosspieces 2. Roller shafts 4 are provided on both sides of the two rectangular tubes 1, and wheel sets 41 are provided at both ends of the roller shafts 4 for rotation. Notches 11 are provided on the inner walls of both ends of the two rectangular tubes 1 for the horizontal sliding of the roller shafts 4. The notches 11 are laser-cut, and their horizontal length is greater than the horizontal range of motion of the crosspiece 2. The notches 11 restrict the direction of motion of the roller shafts 4, and the roller shafts 4 can move horizontally along the notches 11.

[0024] Laser grooving can be completed simultaneously during the production of rectangular tubes. The laser grooving process is less difficult than sheet metal cutting, bending and shaping.

[0025] Four gaskets 7 are fixedly provided on the lower end face of the inner side of the rectangular tube 1. The gaskets 7 support the four wheel assemblies 41 at the ends of the roller shaft 4. The width of the gaskets 7 is smaller than the rectangular tube 1, but larger than the width of the wheel assemblies 41, ensuring that the wheel assemblies 41 have a good support effect while being installed inside the rectangular tube 1. The horizontal length of the gaskets 7 is larger than the length of the slots 11, and the length of the gaskets 7 covers the range of motion of the wheel assemblies 41, ensuring that the wheel assemblies 41 can always be supported. A process hole 12 is provided on the rectangular tube 1 that passes through the upper and lower end faces. Two process holes 12 are provided at both ends of the same slot 11. Bolts 6 are provided through the process holes 12, and the bolts 6 also pass through the gaskets 7 to limit their horizontal positions at both ends. When installing, the gaskets 7 are fed into the interior of the rectangular tube 1 through the openings at both ends of the rectangular tube 1. After being delivered to the right position, the bolts 6 are passed through the lower process hole 12, through the holes on the gaskets 7, and out through the upper process hole 12. Tighten the nuts that match the bolts 6, and follow the above steps to complete the installation. The installation of the bolts 6 in all the process holes 12 completes the horizontal fixation of the gasket 7 in the rectangular tube 1. Under the action of gravity, the gasket 7 fits against the lower inner wall of the rectangular tube 1. The function of the gasket 7 is to support the wheel set 41 to prevent the roller shaft 4 from directly applying force on the notch 11, causing deformation of the notch 11. The gasket 7 transmits the downward pressure of the wheel set 41 to the lower end face of the rectangular tube 1. By utilizing the strength of the rectangular tube 1 itself, the probability of deformation can be effectively reduced, thereby avoiding abnormal noise and obstructed operation.

[0026] The backing strip 7 can be made of a hard rubber material, which not only reduces wheel noise during operation but also offers significant cost savings, as both the material's inherent cost and processing costs are significantly lower than those of thick sheet metal. The holes in the backing strip 7 and the process holes 12 in the rectangular tube 1 are also much easier to create than welding a completely stable and horizontal sheet metal, further reducing the complexity of subsequent production and processing.

[0027] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A track structure embedded in a long rectangular tube of a bed bottom frame, comprising two mirror-symmetrical rectangular tubes (1), with roller shafts (4) provided on both sides of the two rectangular tubes (1), and wheel sets (41) rotatably provided at both ends of the roller shafts (4), characterized in that: The inner walls of both ends of the two rectangular tubes (1) are provided with slots (11) for the horizontal sliding of the roller shaft (4), and four pads (7) are fixedly provided on the lower end surface of the inner side of the rectangular tube (1), and the pads (7) support the four wheel groups (41) at the ends of the roller shaft (4).

2. The track structure according to claim 1, characterized in that: The notch (11) is processed by laser cutting.

3. The track structure according to claim 2, characterized in that: The rectangular tube (1) is provided with a process hole (12) penetrating the upper and lower end surfaces, and two process holes (12) are respectively provided at both ends of the same notch (11).

4. The track structure according to claim 3, characterized in that: A bolt (6) is provided through the process hole (12), and the bolt (6) also passes through the gasket (7) to limit its horizontal position at both ends.

5. The track structure according to claim 1, characterized in that: The horizontal length of the notch (11) is greater than the horizontal range of movement of the crossbar (2).

6. The track structure according to claim 5, characterized in that: The horizontal length of the pad strip (7) is greater than the length of the notch (11).

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