Five-wheel linkage moving structure applied to bed

Abstract

The utility model discloses a five-wheel linkage moving structure applied to a bed, which comprises a bottom frame, four corners of the bottom frame are respectively provided with a trundle, a middle rotating shaft is arranged in the bottom frame, a middle trundle is arranged on the middle rotating shaft, a linkage assembly is arranged in the bottom frame, an adjusting handle is arranged on the outer side of the bottom frame, the linkage assembly is connected with the adjusting handle, and the adjusting handle is connected with the bottom frame. The middle trundle is connected with the linkage assembly, the linkage assembly drives the middle trundle to be attached to the ground or float through the adjusting handle, the middle trundle comprises a trundle support and a rolling wheel, the rolling wheel is rotationally connected with the trundle support, the trundle support is connected with a middle rotating shaft, a limiting frame is installed on the middle rotating shaft, and a connecting shaft is rotationally installed on the trundle support. The connecting shaft is connected with a connecting rod, a limiting wheel is sleeved on the connecting rod, a rotating shaft is movably arranged on the connecting rod, and the rotating shaft is fixedly connected with the limiting frame. The movable bed is easy and convenient to operate, movement of the bed can be better controlled, and the moving difficulty is lowered.

Description

Technical Field

[0001] The utility model relates to a bed, in particular to a five-wheel linkage moving structure applied to the bed. Background Art

[0002] For some beds in hospitals or health care facilities, casters are usually installed on the bottom of the bed to facilitate mobility, so that the bed can be easily pushed to move, saving manpower and reducing the difficulty of operation. At present, beds of this structure often have four casters. In order to facilitate braking and stopping, the casters will use wheels with built-in brake parts. In the process of moving the bed with this four-caster structure, each caster is often controlled separately, and it is often difficult to maintain straight-line movement, and it is not convenient to turn. Moreover, since the casters have built-in brake components, each caster needs to be operated to stop it, which is more troublesome. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a five-wheel linkage moving structure applied to a bed.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A five-wheel linkage mobile structure applied to a bed includes a base frame, a caster is arranged at each of the four corners of the base frame, an intermediate shaft is installed in the base frame, and an intermediate caster is installed on the intermediate shaft, a linkage component is arranged in the base frame, and an adjustment handle is arranged on the outer side of the base frame, the linkage component is connected to the adjustment handle, and the intermediate caster is connected to the linkage component, and the linkage component drives the intermediate caster to fit with the ground or float through the adjustment handle.

[0006] As a further improvement, the intermediate caster includes a caster bracket and a roller, the roller is rotatably connected to the caster bracket, and the caster bracket is connected to the intermediate rotating shaft.

[0007] As a further improvement, a limit frame is installed on the intermediate rotating shaft, a connecting shaft is rotatably installed on the caster bracket, the connecting shaft is connected to a connecting rod, a limiting wheel is mounted on the connecting rod, a rotating shaft is movably installed on the connecting rod, the rotating shaft is fixedly connected to the limit frame, the limit frame is provided with a travel groove, and the connecting shaft is movably installed in the travel groove.

[0008] As a further improvement, the base frame includes two longitudinal rods and two transverse rods, which are connected head to tail to form a frame structure. A transverse fixing rod is provided in the base frame, and both ends of the transverse fixing rod are fixed to the two longitudinal rods through connecting plates, the middle rotating shaft is rotatably connected to the connecting plate, and the limit frame is clamped and installed with the transverse fixing rod.

[0009] As a further improvement, the linkage assembly includes a linkage rod and a connecting rod, the linkage rod is arranged parallel to the longitudinal rod, the linkage rod is connected to the adjustment handle, one end of the connecting rod is connected to the linkage rod, and the other end of the connecting rod is connected to the intermediate rotating shaft.

[0010] As a further improvement, an adjustment shaft is installed in each of the two transverse rods, and both ends of one of the adjustment shafts are connected to an adjustment handle respectively, and both ends of the linkage rod are connected to the two adjustment shafts through a rocker rod.

[0011] As a further improvement, the connecting rod includes a first connecting rod, a second connecting rod and a third connecting rod. The first connecting rod is fixedly mounted on the linkage rod, one end of the second connecting rod is movably connected to the first connecting rod, the other end of the second connecting rod is movably connected to the third connecting rod, and the third connecting rod is fixedly connected to the intermediate rotating shaft.

[0012] As a further improvement, a slide groove is provided in the third connecting rod, a slide shaft is movably inserted in the slide groove, and the slide shaft is fixedly connected to the other end of the second connecting rod.

[0013] As a further improvement, a slot is provided at one end of the second connecting rod, and the slot is movably mounted on the side wall of the first connecting rod and installed through a pin shaft. A spring is installed on the second connecting rod, and the spring is connected to the first connecting rod.

[0014] As a further improvement, a pin is installed on the second connecting rod, and the spring is sleeved on the pin.

[0015] Compared with the prior art, the utility model has the following beneficial technical effects:

[0016] 1. By setting a caster in the middle of the bed bottom, the stability and accuracy of the overall movement are improved;

[0017] 2. The operation is simple. By adjusting the handle, the middle caster can be driven to achieve the purpose of auxiliary braking or floating for normal passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the structure of the utility model with a partial cutaway;

[0020] Figure 3 for Figure 1 A is an enlarged schematic diagram;

[0021] Figure 4 for Figure 1 The enlarged schematic diagram of point B in FIG.

[0022] Reference numerals:

[0023] Caster 1, base frame 2, longitudinal rod 21, transverse rod 22, intermediate shaft 3, intermediate caster 4, caster bracket 41, roller 42, adjustment handle 5, limit frame 6, connecting shaft 7, connecting rod 8, limiting wheel 9, rotating shaft 10, travel groove 11, transverse fixing rod 12, linkage rod 13, adjustment shaft 14, first connecting rod 15, second connecting rod 16, third connecting rod 17, slide groove 18, slide shaft 19, spring 20. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0025] In the description of the present utility model, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like are involved, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] like Figure 1-4As shown, a five-wheel linkage moving structure applied to a bed includes a base frame 2, each of the four corners of the base frame 2 is provided with a caster 1, an intermediate shaft 3 is installed in the base frame 2, and an intermediate caster 4 is installed on the intermediate shaft 3, a linkage component is provided in the base frame 2, an adjustment handle 5 is provided on the outer side of the base frame 2, the linkage component is connected to the adjustment handle 5, and the intermediate caster 4 is connected to the linkage component, and the linkage component drives the intermediate caster to fit with the ground or float by adjusting the handle. The intermediate caster can be used to assist movement and positioning, and can also make the caster float. At this time, the casters at the four corners of the base frame are relied on for movement.

[0028] The intermediate caster 4 includes a caster bracket 41 and a roller 42. The roller 42 is rotatably connected to the caster bracket 41. The caster bracket 41 is connected to the intermediate shaft 3. The intermediate shaft 3 is driven to rotate by the linkage assembly and then drives the caster bracket 41 and the caster 42 to rotate synchronously.

[0029] The intermediate rotating shaft 3 is provided with a limit frame 6, and a connecting shaft 7 is rotatably provided on the caster bracket 41. The connecting shaft 7 is provided with a connecting rod 8, and a limiting wheel 9 is mounted on the connecting rod 8. A rotating shaft 10 is movably provided on the connecting rod 8. The rotating shaft 10 is fixedly connected to the limit frame 6, and a travel groove 11 is provided on the limit frame 6, and the connecting shaft 7 is movably installed in the travel groove 11. The connecting shaft 7 can move up and down along the travel groove 11, and the connecting rod 8 and the connecting shaft 7 are vertically distributed. A sleeve can be provided on the connecting rod 7, and the rotating shaft can movably pass through the sleeve. The limit frame is relatively fixed, and the intermediate caster rotates synchronously with the rotation of the intermediate rotating shaft. When moving upward, it can contact with the limiting wheel to form a limit, and when it is pressed against the ground downward, it is separated from the limiting wheel. In the process of the intermediate caster moving up and down, the directional movement is achieved by the up and down movement of the connecting shaft in the travel groove in the limit frame.

[0030] The base frame 2 includes two longitudinal rods 21 and two transverse rods 22, which are connected head to tail to form a frame structure. A transverse fixing rod 12 is arranged inside the base frame 2, and the two ends of the transverse fixing rod 12 are fixedly installed with the two longitudinal rods 21 through a connecting plate, the middle rotating shaft is rotatably connected with the connecting plate, and the limit frame 6 is engaged with the transverse fixing rod 12.

[0031] The linkage assembly includes a linkage rod 13 and a connecting rod. The linkage rod 13 is arranged parallel to the longitudinal rod 21. The linkage rod is connected to the adjustment handle. One end of the connecting rod is connected to the linkage rod, and the other end of the connecting rod is connected to the intermediate shaft.

[0032] An adjustment shaft 14 is installed in each of the two transverse rods 22, and an adjustment handle is connected to each of the two ends of one of the adjustment shafts, and the two ends of the linkage rod are connected to the two adjustment shafts through a swing rod. When the adjustment handle is turned, the connected adjustment shaft is driven to rotate, and then the linkage rod is pulled to move, and the swing of the middle caster is realized through the connecting rod.

[0033] The connecting rod comprises a first connecting rod 15, a second connecting rod 16 and a third connecting rod 17. The first connecting rod 15 is fixedly mounted on the linkage rod 13. One end of the second connecting rod 16 is movably connected to the first connecting rod 15. The other end of the second connecting rod 16 is movably connected to the third connecting rod 17. The third connecting rod 17 is fixedly connected to the intermediate rotating shaft 3. A sliding groove 18 is provided in the third connecting rod 17. A sliding shaft 19 is movably inserted in the sliding groove 18. The sliding shaft 19 is fixedly connected to the other end of the second connecting rod 16. One end of the second connecting rod 16 is provided with a slot, which is movably clamped on the side wall of the first connecting rod and installed through a pin. The second connecting rod 16 can rotate within a small range relative to the first connecting rod 15. The second connecting rod 16 pulls the sliding shaft 19 to move up and down in the sliding groove 18, and pulls the third connecting rod 17 to swing at the same time. The swinging of the third connecting rod 17 drives the intermediate rotating shaft 3 to rotate.

[0034] A spring 20 is installed on the second connecting rod 16, and the spring 20 is connected to the first connecting rod 15. When the first connecting rod is pressed down, it will press against the spring to form a buffer.

[0035] The second connecting rod 16 is provided with a pin, and the spring is sleeved on the pin, so as to facilitate the stability of the spring assembly.

[0036] In this utility model, reference Figure 1 and 2 When the adjustment handle is turned clockwise, the linkage rod will swing to the right, which will drive the middle shaft to rotate counterclockwise, and the middle caster will rise. When the adjustment handle is turned counterclockwise, the linkage rod will swing to the left, which will drive the middle shaft to rotate clockwise, and the middle caster will sink.

[0037] When the middle caster is in contact with the ground, it cooperates with the casters at the four corners of the chassis to support the movement. If braking is required, you can step on or manually turn the adjustment handle counterclockwise, and the adjustment rotation drives the linkage rod to swing toward the left side of the chassis. The first link pulls the second link, and the second link pulls the slide shaft to move upward in the slide slot. At the same time, the third link is pulled to swing toward the left side of the chassis, driving the middle shaft to rotate clockwise. At this time, the middle caster sinks to form a tightening force.

[0038] When the middle caster is not needed, the adjustment handle can be stepped on or manually turned in the clockwise direction. The first connecting rod pushes the second connecting rod, and the second connecting rod pushes the sliding shaft to move from top to bottom in the sliding groove. At the same time, the third connecting rod is pushed toward the right side of the chassis, driving the middle rotating shaft to rotate counterclockwise, so that the middle caster floats up, and the connecting shaft moves upward in the travel groove until the middle caster touches the limiting wheel.

[0039] It should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A five-wheel linkage mobile structure applied to a bed, comprising a base frame, characterized in that: A caster is respectively arranged at the four corners of the base frame, an intermediate rotating shaft is installed in the base frame, and the intermediate caster is installed on the intermediate rotating shaft, a linkage assembly is arranged in the base frame, an adjusting handle is arranged on the outer side of the base frame, the linkage assembly is connected with the adjusting handle, and the intermediate caster is connected with the linkage assembly, and the linkage assembly drives the intermediate caster to fit or float to the ground through the adjusting handle; the base frame comprises two longitudinal rods and two transverse rods, and the two longitudinal rods and the two transverse rods are connected head to tail to enclose a frame structure, a transverse fixing rod is arranged in the base frame, and the two ends of the transverse fixing rod are fixedly installed with the two longitudinal rods through a connecting plate, the intermediate rotating shaft is rotatably connected with the connecting plate, and the limit frame is clamped and installed with the transverse fixing rod; the linkage assembly comprises a linkage rod and a connecting rod, the linkage rod is arranged parallel to the longitudinal rod, the linkage rod is connected with the adjusting handle, one end of the connecting rod is connected to the linkage rod, and the other end of the connecting rod is connected to the intermediate rotating shaft.

2. The five-wheel linkage moving structure applied to a bed according to claim 1, characterized in that: The intermediate caster comprises a caster bracket and a roller, the roller is rotatably connected to the caster bracket, and the caster bracket is connected to the intermediate rotating shaft.

3. The five-wheel linkage moving structure applied to a bed according to claim 2, characterized in that: A limit frame is installed on the intermediate rotating shaft, a connecting shaft is rotatably installed on the caster bracket, the connecting shaft is connected to a connecting rod, a limiting wheel is sleeved on the connecting rod, a rotating shaft is movably installed on the connecting rod, the rotating shaft is fixedly connected to the limit frame, a travel groove is provided on the limit frame, and the connecting shaft is movably installed in the travel groove.

4. The five-wheel linkage moving structure applied to a bed according to claim 1, characterized in that: An adjusting shaft is installed in each of the two transverse rods, wherein both ends of one adjusting shaft are respectively connected to an adjusting handle, and both ends of the linkage rod are respectively connected to the two adjusting shafts through a rocker rod.

5. The five-wheel linkage moving structure applied to a bed according to claim 1, characterized in that: The connecting rod comprises a first connecting rod, a second connecting rod and a third connecting rod. The first connecting rod is fixedly mounted on the linkage rod, one end of the second connecting rod is movably connected to the first connecting rod, the other end of the second connecting rod is movably connected to the third connecting rod, and the third connecting rod is fixedly connected to the intermediate rotating shaft.

6. The five-wheel linkage moving structure applied to a bed according to claim 5, characterized in that: A sliding groove is arranged in the third connecting rod, a sliding shaft is movably inserted in the sliding groove, and the sliding shaft is fixedly connected to the other end of the second connecting rod.

7. The five-wheel linkage moving structure applied to a bed according to claim 5, characterized in that: One end of the second connecting rod is provided with a slot, which is movably mounted on the side wall of the first connecting rod and installed through a pin shaft. A spring is installed on the second connecting rod, and the spring is connected to the first connecting rod.

8. The five-wheel linkage moving structure applied to a bed according to claim 7, characterized in that: A pin is installed on the second connecting rod, and a spring is sleeved on the pin.

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