Travel mechanism and nursing bed having same

Abstract

Provided in the present application are a travel mechanism and a nursing bed having same. The travel mechanism comprises: a frame; and a rolling wheel group, which comprises a one-way wheel and a plurality of universal wheels, wherein the one-way wheel is arranged on the frame, and the plurality of universal wheels are arranged on the frame at intervals in the circumferential direction of the frame and around the periphery of the one-way wheel, the rolling axis of the one-way wheel extending in the direction of width of the frame. The technical solution provided in the present application can solve the problem of manpower waste due to nursing beds in the prior art.

Description

Walking mechanism and nursing bed having the same Technical Field

[0001] The present application relates to the technical field of nursing beds, and in particular to a walking mechanism and a nursing bed having the same.

[0002] This application claims priority to a patent application filed with the State Intellectual Property Office of China on September 19, 2023, with application number 2023225525342 and invention name “Walking mechanism and nursing bed with the same”. Background Art

[0003] A nursing bed is a medical device used for rest and recuperation for patients or elderly people with limited mobility. It has multiple positions to meet the user's various care needs. At the same time, the nursing bed is equipped with rollers to facilitate the transfer of the user by the caregiver.

[0004] In the related art, universal wheels are provided on the four corners of the nursing bed. By utilizing the feature that the universal wheels can be rotated at any angle, the nursing bed can be conveniently adjusted to any forward direction.

[0005] However, due to the arbitrarily swivel nature of the universal wheels, it is difficult to determine the direction during the push, and the pusher can easily go off course. Therefore, two people are often required to operate it: one person directs the pusher from the front, and the other pushes it from the back, which wastes manpower.

[0006] Summary of the Invention

[0007] The present application provides a walking mechanism and a nursing bed having the same, so as to solve the problem of waste of manpower in nursing beds in related technologies.

[0008] According to one aspect of the present application, a walking mechanism is provided, which includes: a frame; a roller group, including a one-way wheel and a plurality of universal wheels, the one-way wheel is arranged on the frame, and the plurality of universal wheels are arranged on the frame at intervals along the circumference of the frame and around the outer periphery of the one-way wheel, and the rolling axis of the one-way wheel extends along the width direction of the frame.

[0009] Furthermore, the multiple universal wheels all have a rolling state and a braking state, and the one-way wheel has a walking position in contact with the ground and a recovery position recovered to the frame and separated from the ground. When the multiple universal wheels are in the rolling state, the one-way wheel is in the walking position, and when the multiple universal wheels are in the braking state, the one-way wheel is in the recovery position.

[0010] Furthermore, the walking mechanism includes a drive assembly and a wheel seat, the one-way wheel is arranged at the first end of the wheel seat, the drive assembly is driven and connected to the second end of the wheel seat, the middle part of the wheel seat is hinged to the frame, and the drive assembly can drive the wheel seat to rotate relative to the frame so that the one-way wheel can switch between the walking position and the recovery position.

[0011] Furthermore, the drive assembly includes an upper lifting member and a lower lifting member, the upper end of the upper lifting member is hinged to the frame at a first position, the lower end of the upper lifting member is hinged to the upper end of the lower lifting member, the lower end of the lower lifting member is hinged to the second end of the wheel seat, the middle part of the wheel seat is hinged to the frame at a second position, and the first position is located above the second position.

[0012] Furthermore, the upper lifting member includes a rotating shaft and an upper lifting plate, the rotating shaft extends along the width direction of the frame, the rotating shaft is rotatably arranged on the frame around its own axis, and the upper end of the upper lifting plate is fixedly connected to the rotating shaft; and / or, the lower lifting member includes a lower lifting plate.

[0013] Furthermore, the walking mechanism also includes a brake assembly, which is respectively connected to the multiple universal wheels and the one-way wheels. The brake assembly can drive the multiple universal wheels to switch from a rolling state to a braking state, and drive the one-way wheels to switch from a walking position to a recovery position.

[0014] Furthermore, the brake assembly includes a front brake shaft, a rear brake shaft and a brake connecting rod. The front brake shaft and the rear brake shaft are arranged on the frame along the length direction of the frame and are rotatable. Some universal wheels are mounted on the front brake shaft, and the remaining universal wheels are mounted on the rear brake shaft. The brake connecting rod extends along the length direction of the frame and can move along the length direction of the frame. The two ends of the brake connecting rod are respectively hinged to the front brake shaft and the rear brake shaft. A brake pedal is provided on the front brake shaft and / or the rear brake shaft. The brake pedal can drive multiple universal wheels to switch between rolling state and braking state through the front brake shaft and / or the rear brake shaft. The brake connecting rod can drive the one-way wheel to switch between walking position and recovery position.

[0015] Furthermore, the drive assembly also includes a drive plate, the lower end of the drive plate is fixedly connected to the upper lifting member, the upper end of the drive plate is provided with a strip hole, and the brake connecting rod is provided with a protrusion extending along the width direction of the frame. The protrusion can be slidably passed through the strip hole to enable the upper lifting member to rotate relative to the frame.

[0016] Furthermore, the walking mechanism also includes a guide shaft and a lifting shaft. The upper end of the guide shaft is hinged to the frame. A guide hole extending in the vertical direction is provided on the guide shaft. The lifting shaft extends along the width direction of the frame and passes through the guide hole. One end of the lifting shaft is fixedly connected to the wheel seat.

[0017] Furthermore, the walking mechanism also includes a spring, which is sleeved on the outer circumference of the guide shaft. The upper end of the guide shaft is hinged to the frame through a hinge shaft, and both ends of the spring are respectively in contact with the hinge shaft and the lifting shaft.

[0018] According to another aspect of the present application, a nursing bed is provided, which includes: a bed body; a walking mechanism located below the bed body, the frame of the walking mechanism is connected to the bed body, and the walking mechanism is the walking mechanism provided above.

[0019] Using the technical solution of this application, the walking mechanism includes a frame and a roller assembly. When pushing the nursing bed, the rolling axis of the one-way wheels extends along the width of the frame, controlling the travel direction of the universal wheels and, in turn, the direction of the nursing bed. When the nursing bed needs to turn, the one-way wheels can form a fulcrum, allowing multiple universal wheels to rotate around the one-way wheels to smoothly complete the turn. Using this walking mechanism, only one caregiver is required to complete the walking and turning functions of the nursing bed, saving labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings that constitute part of this application are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0021] FIG1 shows a top view of a walking mechanism according to an embodiment of the present application;

[0022] FIG2 shows a cross-sectional view of a walking mechanism according to an embodiment of the present application;

[0023] FIG3 shows a schematic structural diagram of the one-way wheel and the drive assembly in FIG2 ;

[0024] FIG4 shows a cross-sectional view of the one-way wheel and drive assembly in FIG2 ;

[0025] FIG5 shows a side view of a walking mechanism according to an embodiment of the present application.

[0026] Among them, the above-mentioned drawings include the following figure marks: 10, frame; 20, roller group; 21, one-way wheel; 22, universal wheel; 30, drive assembly; 31, upper lifting member; 311, rotating shaft; 312, upper lifting plate; 32, lower lifting member; 33, drive plate; 331, strip hole; 40, wheel seat; 50, brake assembly; 51, front brake shaft; 52, rear brake shaft; 53, brake connecting rod; 531, protrusion; 54, brake pedal; 60, guide shaft; 70, lifting shaft; 80, spring. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0028] As shown in Figures 1 to 5, an embodiment of the present application provides a walking mechanism, which includes a frame 10 and a roller group 20. The roller group 20 includes a one-way wheel 21 and a plurality of universal wheels 22. The one-way wheel 21 is arranged on the frame 10, and the plurality of universal wheels 22 are arranged on the frame 10 at circumferential intervals and around the outer periphery of the one-way wheel 21. The rolling axis of the one-way wheel 21 extends along the width direction of the frame 10.

[0029] Applying the technical solution of the present application, the walking mechanism includes a frame 10 and a roller assembly 20. When the nursing bed is pushed to move in a straight line, the rolling axis of the one-way wheel 21 extends along the width direction of the frame 10, which can control the travel direction of the universal wheel 22, and thus the travel direction of the nursing bed. When the nursing bed needs to turn, the one-way wheel 21 can form a fulcrum, allowing multiple universal wheels 22 to rotate around the one-way wheel 21 to smoothly complete the turn. Using the above-mentioned walking mechanism, only one caregiver is required to complete the walking and turning functions of the nursing bed, which can save labor costs.

[0030] In this embodiment, there are four universal wheels 22, which are respectively arranged at the four corners of the frame 10. The one-way wheel 21 is arranged at the center of the frame 10. The frame 10 is a rectangular structure.

[0031] Specifically, the plurality of universal wheels 22 each have a rolling state and a braking state, and the one-way wheel 21 has a running position in contact with the ground and a recovery position in which it is retracted to the frame 10 and separated from the ground. When the plurality of universal wheels 22 are in the rolling state, the one-way wheel 21 is in the running position, and when the plurality of universal wheels 22 are in the braking state, the one-way wheel 21 is in the recovery position. With this arrangement, when the nursing bed is moving, the one-way wheel 21 can be moved to the running position to control the direction of travel of the nursing bed. When the nursing bed is turning, the one-way wheel 21 can be used as a fulcrum. When the nursing bed brakes, the one-way wheel 21 is retracted to the recovery position, which can make the braking state of the nursing bed more stable.

[0032] The driving member for driving the state switching of the plurality of universal wheels 22 and the driving member for driving the position switching of the unidirectional wheel 21 may be the same driving member or different driving members.

[0033] As shown in Figure 3, the walking mechanism includes a drive assembly 30 and a wheel seat 40. The one-way wheel 21 is arranged at the first end of the wheel seat 40. The drive assembly 30 is driven and connected to the second end of the wheel seat 40. The middle part of the wheel seat 40 is hinged to the frame 10. The drive assembly 30 can drive the wheel seat 40 to rotate relative to the frame 10 so that the one-way wheel 21 switches between the walking position and the recovery position, which has the advantage of simple structure.

[0034] As shown in FIG3 , the drive assembly 30 includes an upper lifting member 31 and a lower lifting member 32. The upper end of the upper lifting member 31 is hinged to the frame 10 at a first position, the lower end of the upper lifting member 31 is hinged to the upper end of the lower lifting member 32, the lower end of the lower lifting member 32 is hinged to the second end of the wheel seat 40, and the middle portion of the wheel seat 40 is hinged to the frame 10 at a second position, with the first position being above the second position. With the drive assembly 30 having the above structure, when the upper lifting member 31 rotates relative to the frame 10, the upper lifting member 31 can be used to drive the lower lifting member 32 to rotate, thereby changing the distance between the upper end of the upper lifting member 31 and the lower end of the lower lifting member 32, so that the lower lifting member 32 can be used to drive the wheel seat 40 to rotate relative to the frame 10, thereby switching the one-way wheel 21 between the traveling position and the recovery position.

[0035] It should be noted that since the first position is located above the second position, a height difference can be formed between the upper end of the upper lifting member 31 and the lower end of the lower lifting member 32, so that the position of the lower end of the lower lifting member 32 can be changed.

[0036] As shown in Figure 3, the upper lifting member 31 includes a rotating shaft 311 and an upper lifting plate 312. The rotating shaft 311 extends along the width direction of the frame 10. The rotating shaft 311 is rotatably arranged on the frame 10 around its own axis. The upper end of the upper lifting plate 312 is fixedly connected to the rotating shaft 311. The upper lifting member 31 with the above structure can rotate using the rotating shaft 311 to drive the upper lifting plate 312 to rotate around the rotating shaft 311, thereby driving the lower lifting member 32 to rotate.

[0037] In this embodiment, the lower lifting member 32 includes a lower lifting plate.

[0038] Specifically, the wheel seat 40 includes two wheel seat plates spaced apart along the width direction of the frame 10, the one-way wheel 21 is arranged between the two wheel seat plates, both of which are hinged to the frame 10, the upper lifting plate 312 and the lower lifting plate are both U-shaped plate structures, and the two side walls of the lower lifting plate are respectively hinged to the two wheel seat plates, and the two side walls of the upper lifting plate 312 are respectively hinged to the two side walls of the lower lifting plate.

[0039] As shown in Figures 1 and 2, the travel mechanism also includes a brake assembly 50, which is drivingly connected to the multiple universal wheels 22 and the one-way wheels 21. The brake assembly 50 can drive the multiple universal wheels 22 to switch from a rolling state to a braking state, and drive the one-way wheels 21 to switch from a running position to a retracted position. Using the brake assembly 50 to simultaneously drive the multiple universal wheels 22 and the one-way wheels 21 has the advantages of a simple drive structure and cost savings.

[0040] As shown in Figures 2 and 3, the brake assembly 50 includes a front brake shaft 51, a rear brake shaft 52 and a brake link 53. The front brake shaft 51 and the rear brake shaft 52 are rotatably arranged on the frame 10 along the length direction of the frame 10. Some universal wheels 22 are mounted on the front brake shaft 51, and the remaining universal wheels 22 are mounted on the rear brake shaft 52. The brake link 53 extends along the length direction of the frame 10 and can move along the length direction of the frame 10. The two ends of the brake link 53 are respectively hinged to the front brake shaft 51 and the rear brake shaft 52. A brake pedal 54 is provided on the front brake shaft 51 and / or the rear brake shaft 52. The brake pedal 54 can drive multiple universal wheels 22 to switch between a rolling state and a braking state through the front brake shaft 51 and / or the rear brake shaft 52. The brake link 53 can drive the one-way wheel 21 to switch between a walking position and a recovery position. With the brake assembly 50 of the above structure, when the caregiver steps on the brake pedal 54, the front brake shaft 51 can be used to switch the universal wheel 22 mounted thereon between a rolling state and a braking state, and the rear brake shaft 52 can be used to switch the universal wheel 22 mounted thereon between a rolling state and a braking state. At the same time, the brake pedal 54 can be used to rotate the front brake shaft 51 or the rear brake shaft 52 to drive the brake link 53 to move, thereby driving the one-way wheel 21 to switch between a walking position and a recovery position.

[0041] In this embodiment, the universal wheel 22 is rotatably mounted on the axle. The roller assembly 20 includes a rotatable cam structure. When the brake pedal 54 is stepped on, the brake pedal 54 drives the cam structure to rotate via the front brake shaft 51. The cam structure can contact the rim of the universal wheel 22, thereby braking the universal wheel 22. Similarly, when the rear brake shaft 52 rotates, it can drive the corresponding cam structure to rotate, thereby braking the rear universal wheel 22.

[0042] As shown in Figures 2 and 3, the drive assembly 30 further includes a drive plate 33, the lower end of which is fixedly connected to the upper lifting member 31. The upper end of the drive plate 33 is provided with a strip-shaped hole 331. The brake link 53 is provided with a protrusion 531 extending along the width direction of the frame 10. The protrusion 531 is slidably inserted into the strip-shaped hole 331 to enable the upper lifting member 31 to rotate relative to the frame 10. When the brake link 53 moves along the length direction of the frame 10, the protrusion 531 thereon can drive the drive plate 33 to rotate, which in turn drives the upper lifting member 31 to rotate. The upper lifting member 31 then drives the lower lifting member 32 to rotate, thereby switching the one-way wheel 21 between the running position and the recovery position.

[0043] In this embodiment, the driving plate 33 is fixedly connected to the rotating shaft 311 .

[0044] When the brake link 53 moves along the length direction of the frame 10 , the protrusion 531 can slide in the strip-shaped hole 331 , so that the driving plate 33 can rotate.

[0045] It should be noted that a bearing seat is further provided on the frame 10 , and the rotating shaft 311 rotatably passes through the bearing seat and is connected to the driving plate 33 .

[0046] Specifically, a connecting plate is connected to the brake link 53 , and the protrusion 531 is provided at the lower end of the connecting plate.

[0047] In this embodiment, a seat plate extending along its width direction is provided in the middle of the frame 10, and the one-way wheel 21 is movably provided on the seat plate. The seat plate has a vertically extending base plate, the wheel seat 40 is hinged to the base plate, and the rotating shaft 311 is rotatably provided in the base plate.

[0048] As shown in FIG4 , the travel mechanism further includes a guide shaft 60 and a lifting shaft 70. The upper end of the guide shaft 60 is hingedly connected to the frame 10. The guide shaft 60 is provided with a guide hole extending in the vertical direction. The lifting shaft 70 extends along the width of the frame 10 and passes through the guide hole. One end of the lifting shaft 70 is fixedly connected to the wheel seat 40. By providing the guide shaft 60, when the one-way wheel 21 switches between the retracted position and the travel position, the lifting shaft 70 can be driven by the wheel seat 40 to move along the extension direction of the guide hole, thereby guiding the movement of the wheel seat 40.

[0049] In this embodiment, the connection between the lifting shaft 70 and the wheel seat 40 is located between the hinge between the wheel seat 40 and the frame 10 and the one-way wheel 21 .

[0050] As shown in Figure 4, the travel mechanism further includes a spring 80, which is sleeved around the outer periphery of the guide shaft 60. The upper end of the guide shaft 60 is hinged to the frame 10 via a hinge axis, and the ends of the spring 80 respectively abut against the hinge axis and the lifting shaft 70. The spring 80 exerts an elastic force, causing the lifting shaft 70 to move rapidly from top to bottom in the guide hole, thereby quickly switching the one-way wheel 21 to the travel position.

[0051] In this embodiment, a spring seat is provided at the lower end of the spring 80 . The spring seat is sleeved on the outer periphery of the guide shaft 60 and abuts against the lifting shaft 70 .

[0052] The following is an explanation of the specific working process of the walking mechanism:

[0053] By stepping on the brake pedal 54, the caregiver can rotate the front brake shaft 51, which in turn rotates the rear brake shaft 52 via the brake link 53, causing the multiple universal wheels to switch from a rolling state to a braking state. Furthermore, when the brake link 53 moves, the protrusion 531 can drive the drive plate 33 to rotate, which in turn drives the rotation shaft 311, which in turn drives the upper lifting plate 312 to rotate, and the upper lifting plate 312 drives the lower lifting plate to rotate, causing the second end of the wheel seat 40 to descend, thereby moving the one-way wheel 21 from the running position to the retracted position.

[0054] Another embodiment of the present application provides a nursing bed, which includes a bed body and a walking mechanism. The walking mechanism is located below the bed body, and the frame 10 of the walking mechanism is connected to the bed body. The walking mechanism is the walking mechanism provided above. When the nursing bed is pushed to move in a straight line, the rolling axis of the one-way wheel 21 is extended along the width direction of the frame 10 to control the walking direction of the universal wheel 22, thereby controlling the walking direction of the nursing bed. When the nursing bed needs to turn, the one-way wheel 21 can form a fulcrum, so that multiple universal wheels 22 rotate around the one-way wheel 21 to smoothly complete the turn. With the above-mentioned walking mechanism, only one caregiver is needed to complete the walking and turning functions of the nursing bed, which can save labor costs.

Claims

1. A walking mechanism, characterized in that: The walking mechanism comprises: Frame (10); The roller group (20) comprises a one-way wheel (21) and a plurality of universal wheels (22), wherein the one-way wheel (21) is arranged on the frame (10), and the plurality of universal wheels (22) are arranged on the frame (10) at intervals along the circumference of the frame (10) and are arranged around the outer circumference of the one-way wheel (21), and the rolling axis of the one-way wheel (21) extends along the width direction of the frame (10).

2. The walking mechanism according to claim 1, characterized in that: The plurality of universal wheels (22) have a rolling state and a braking state, the one-way wheel (21) has a walking position in contact with the ground and a recovery position recovered to the frame (10) and separated from the ground, when the plurality of universal wheels (22) are in the rolling state, the one-way wheel (21) is located at the walking position, and when the plurality of universal wheels (22) are in the braking state, the one-way wheel (21) is located at the recovery position.

3. The walking mechanism according to claim 2, characterized in that: The walking mechanism comprises a driving assembly (30) and a wheel seat (40); the one-way wheel (21) is arranged at a first end of the wheel seat (40); the driving assembly (30) is drivingly connected to a second end of the wheel seat (40); a middle portion of the wheel seat (40) is hinged to the frame (10); the driving assembly (30) can drive the wheel seat (40) to rotate relative to the frame (10) so that the one-way wheel (21) switches between the walking position and the recovery position.

4. The walking mechanism according to claim 3, characterized in that: The driving assembly (30) includes an upper lifting member (31) and a lower lifting member (32), the upper end of the upper lifting member (31) is hinged to the frame (10) at a first position, the lower end of the upper lifting member (31) is hinged to the upper end of the lower lifting member (32), the lower end of the lower lifting member (32) is hinged to the second end of the wheel seat (40), the middle part of the wheel seat (40) is hinged to the frame (10) at a second position, and the first position is located above the second position.

5. The walking mechanism according to claim 4, characterized in that: The upper lifting member (31) comprises a rotating shaft (311) and an upper lifting plate (312), wherein the rotating shaft (311) extends along the width direction of the frame (10), the rotating shaft (311) is rotatably arranged on the frame (10) around its own axis, and the upper end of the upper lifting plate (312) is fixedly connected to the rotating shaft (311); and / or, The lower lifting member (32) comprises a lower lifting plate.

6. The walking mechanism according to claim 4, characterized in that: The walking mechanism further comprises a brake assembly (50), wherein the brake assembly (50) is respectively connected to the plurality of universal wheels (22) and the one-way wheel (21) for driving. The brake assembly (50) can drive the plurality of universal wheels (22) to switch from the rolling state to the braking state, and drive the one-way wheel (21) to switch from the walking position to the recovery position.

7. The walking mechanism according to claim 6, characterized in that: The brake assembly (50) comprises a front brake shaft (51), a rear brake shaft (52) and a brake connecting rod (53); the front brake shaft (51) and the rear brake shaft (52) are rotatably arranged on the frame (10) along the length direction of the frame (10); part of the universal wheel (22) is sleeved on the front brake shaft (51), and the rest of the universal wheel (22) is sleeved on the rear brake shaft (52); the brake connecting rod (53) extends along the length direction of the frame (10) and can be rotatably arranged on the frame (10) along the length direction of the frame (10). The two ends of the brake link (53) are respectively hinged to the front brake shaft (51) and the rear brake shaft (52); a brake pedal (54) is provided on the front brake shaft (51) and / or the rear brake shaft (52); the brake pedal (54) can drive the plurality of universal wheels (22) to switch between the rolling state and the braking state through the front brake shaft (51) and / or the rear brake shaft (52); the brake link (53) can drive the one-way wheel (21) to switch between the walking position and the recovery position.

8. The traveling mechanism according to claim 7, characterized in that: The driving assembly (30) further comprises a driving plate (33), the lower end of which is fixedly connected to the upper lifting member (31), the upper end of which is provided with a strip hole (331), the brake connecting rod (53) is provided with a protrusion (531) extending along the width direction of the frame (10), and the protrusion (531) can be slidably inserted into the strip hole (331) to enable the upper lifting member (31) to rotate relative to the frame (10).

9. The walking mechanism according to claim 3, characterized in that: The walking mechanism also includes a guide shaft (60) and a lifting shaft (70), the upper end of the guide shaft (60) is hinged to the frame (10), the guide shaft (60) is provided with a guide hole extending in the vertical direction, the lifting shaft (70) extends in the width direction of the frame (10) and is passed through the guide hole, and one end of the lifting shaft (70) is fixedly connected to the wheel seat (40).

10. The walking mechanism according to claim 9, characterized in that: The walking mechanism also includes a spring (80), which is sleeved on the outer circumference of the guide shaft (60). The upper end of the guide shaft (60) is hinged to the frame (10) through a hinge shaft, and the two ends of the spring (80) are respectively in contact with the hinge shaft and the lifting shaft (70).

11. A nursing bed, characterized in that: The nursing bed comprises: Bed; A walking mechanism is located below the bed body, a frame (10) of the walking mechanism is connected to the bed body, and the walking mechanism is the walking mechanism according to any one of claims 1 to 10.

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