Multi-functional push bed

Abstract

The present invention relates to a multifunctional stretcher, which includes a bed frame, a power device, a main control circuit and a battery. The bed frame includes an upper bed frame and a lower bed frame, and the upper bed frame and the lower bed frame are connected by a lifting device. The power device, the main control circuit and the battery are arranged on the lower bed frame, and casters are arranged at the bottom of the lower bed frame. The power device includes two sets of walking drive mechanisms, and the walking drive mechanisms include driving wheels and walking drive motors. The driving wheels of the two sets of walking drive mechanisms are located at the bottom of the bed frame and distributed left and right. The driving wheels are connected to the walking drive motors by transmission, and the walking drive motors are electrically connected to the main control circuit. This multifunctional stretcher has the functions of electric power assistance and upper bed frame lifting control at the same time, and the two driving wheels of the electric power assistance are respectively controlled by a walking drive motor, so the two driving wheels can be independently controlled. When the two driving wheels are synchronized, the stretcher can be driven linearly; when the two driving wheels are running at differential speeds, the stretcher can be turned and walked.

Description

Technical Field

[0001] The present invention relates to a vehicle, in particular to a multifunctional stretcher bed. Background Art

[0002] Currently, medical care transfer beds mainly include a lower bed frame, an upper bed frame and universal casters. The universal casters are arranged at the bottom of the lower bed frame, and the upper bed frame is arranged above the lower bed frame. The upper bed frame is mainly used for placing a mattress and allowing a patient to lie on it, and the lower bed frame can be used for placing medical instruments and equipment. Therefore, when the medical care transfer bed is carrying a person, it is rather strenuous to push the medical care transfer bed, and moreover, when operated by one person, it is difficult to control the walking direction. In addition, since patients with limited mobility often need to undergo relatively many examinations during hospitalization, and different examination items are located in different areas, generally two nursing workers (or one nursing worker and the patient's family members are required to accompany) are needed in existing hospitals to transfer the patient to different examination areas for examination through the medical care transfer bed, which consumes a lot of manpower and also increases the hospitalization cost.

[0003] Moreover, the main function of the current medical care transfer bed is to be used when transferring a patient with limited mobility on a ward bed to other departments. Since the medical care transfer bed and the ward bed may not be of similar height, it is difficult for the patient to transfer to the transfer bed. Moreover, due to the relatively high upper bed frame, it is also not conducive to the patient getting onto the bed. Summary of the Invention

[0004] The purpose of the present invention is to provide a multifunctional stretcher bed with a reasonable structure, electric power assistance and an electric lifting function.

[0005] The purpose of the present invention is achieved as follows:

[0006] A multifunctional stretcher bed includes a bed frame, a power device, a main control circuit and a battery. The bed frame includes an upper bed frame and a lower bed frame, and the upper bed frame and the lower bed frame are connected by a lifting device. The power device, the main control circuit and the battery are arranged on the lower bed frame. Casters are arranged at the bottom of the lower bed frame. It is characterized in that: the power device includes two sets of walking drive mechanisms. The walking drive mechanism includes a drive wheel and a walking drive motor. The drive wheels of the two sets of walking drive mechanisms are located at the bottom of the bed frame and are distributed one on the left and one on the right. The drive wheel is in transmission connection with the walking drive motor, and the walking drive motor is electrically connected to the main control circuit; an armrest is arranged on the upper bed frame, and a controller for sending a control signal to the main control circuit is arranged on the armrest. The controller is electrically connected to the main control circuit; a remote controller for sending a control signal to the main control circuit is further included, and the remote controller is electrically connected to the main control circuit.

[0007] The purpose of the present invention can also be solved by adopting the following technical measures:

[0008] As a more specific solution, the power device further includes a wheel frame, and the two sets of traveling drive mechanisms are arranged at the bottom of the wheel frame; the wheel frame is horizontally rotatably arranged on the bed frame, and a steering drive mechanism for controlling the rotation of the wheel frame is provided on the bed frame. The steering drive mechanism includes a steering drive motor, and the steering drive motor is electrically connected to the main control circuit.

[0009] As a further solution, the traveling drive mechanism further includes a motor base and a shaft seat. The motor base and the shaft seat are arranged at the bottom of the wheel frame. The traveling drive motor is arranged on the motor base. A rotating shaft is rotatably arranged on the shaft seat. One end of the rotating shaft is in transmission connection with the driving wheel, and the other end of the rotating shaft is in transmission connection with the traveling drive motor through a first pulley transmission pair.

[0010] As a further solution, the steering drive mechanism includes a steering drive motor, a gear pair and a gear frame. The gear frame is arranged on the bed frame. The steering drive motor and the gear pair are in transmission connection and arranged on the gear frame; a steering wheel is provided on the bed frame corresponding to the upper part of the wheel frame. A steering drive tooth groove is provided on the outer periphery of the steering wheel, and the steering drive tooth groove is engaged with the gear pair.

[0011] As a further solution, a speed reducer is further provided on the gear frame. The gear pair includes a small gear and a large gear. The steering drive motor is in transmission connection with the small gear through the speed reducer. The small gear is engaged with the large gear, and the large gear is engaged with the steering drive tooth groove of the wheel frame.

[0012] As a further solution, the lifting device includes two sets of strut mechanisms and a lifting drive mechanism. The two sets of strut mechanisms are respectively arranged at the front and rear ends of the bed frame. The strut mechanism includes an inclined strut and a transverse sliding seat. The upper end of the inclined strut is hinged to the upper bed frame, and the lower end of the inclined strut is hinged to the transverse sliding seat. The transverse sliding seat is slidably arranged back and forth on the lower bed frame; the lifting drive mechanism includes a lifting drive motor and a sliding seat transmission pair for pushing the transverse sliding seat to move. The lifting drive motor is arranged on the lower bed frame and is in transmission connection with the sliding seat transmission pair. The lifting drive motor is electrically connected to the main control circuit. Or, the lifting device includes an upper foot tube, a lower foot tube, a screw rod and a screw sleeve. The screw rod is rotatably arranged in the lower foot tube. The screw sleeve is arranged in the upper foot tube and is in threaded connection with the screw rod. The cross sections of the upper foot tube and the lower foot tube are rectangular. The upper foot tube and the lower foot tube are sleeved and in linear sliding fit. The upper end of the upper foot tube is connected to the upper bed frame, and the lower end of the lower foot tube is connected to the lower bed frame. At least two sets of front and rear lifting devices are provided, and the screw rods of each set of lifting devices are linked with the lifting drive motor.

[0013] As a further solution, the carriage transmission pair includes a synchronous shaft and two sets of lead screw transmission pairs. The synchronous shaft is rotatably arranged on the lower bed frame and points forward and backward. The synchronous shaft passes between the wheel frame and the steering wheel. Each lead screw transmission pair includes a lead screw and a nut connected by a thread. The lead screw is rotatably arranged on the lower bed frame and points forward and backward, and the nut is connected to the transverse carriage; both ends of the synchronous shaft are respectively drivingly connected to the lead screws of the two sets of lead screw transmission pairs, and the synchronous shaft is also drivingly connected to the lifting drive motor.

[0014] As a further solution, a vertical guiding telescopic rod is also provided between the upper bed frame and the lower bed frame. The vertical guiding telescopic rod includes a fixed rod and a movable sleeve. Both the fixed rod and the movable sleeve are vertically arranged. The lower end of the fixed rod is connected to the lower bed frame, the upper end of the fixed rod is sleeved with the movable sleeve and is in perpendicular sliding fit with each other, and the upper end of the fixed rod is connected to the upper bed frame.

[0015] As a further solution, two sets of linear guiding devices are provided between the steering wheel and the wheel frame. The two sets of linear guiding devices are evenly distributed around the rotation center of the steering wheel and are located on the left and right sides of the synchronous shaft; each linear guiding device includes a longitudinal guiding rod and a longitudinal guiding sleeve. The upper end of the longitudinal guiding rod is fixedly connected to the steering wheel, the lower end of the longitudinal guiding rod passes through the longitudinal guiding sleeve, and the longitudinal guiding sleeve is arranged on the wheel frame and is in perpendicular sliding fit with the longitudinal guiding rod.

[0016] As a further solution, more than two adjusting bolts are provided beside the linear guiding device. The adjusting bolts pass through the wheel frame from bottom to top and are threadedly connected to the wheel frame. The upper ends of the adjusting bolts are fixedly abutted or rotationally fitted with the steering wheel; a compression spring is also sleeved outside the adjusting bolts, and the compression spring is press-fitted between the steering wheel and the wheel frame.

[0017] The beneficial effects of the present invention are as follows:

[0018] (1) This multifunctional push bed simultaneously has the functions of electric power assistance and lifting control of the upper bed frame. Moreover, the two driving wheels for electric power assistance are respectively controlled by a walking drive motor. Therefore, the two driving wheels can be independently controlled. When the two driving wheels are synchronized, linear driving of the push bed can be achieved; when the two driving wheels run differentially, steering walking of the push bed can be achieved.

[0019] (2) This multifunctional push bed can directly control the steering of the power device through the steering drive mechanism, that is, realize the steering of the bed frame. Its operation is convenient, and even when the bed frame is in a loaded state, a single person can easily control it.

[0020] (3) The steering drive mechanism of this multifunctional push bed is driven by electricity, and the operation is more convenient.

[0021] (4) The steering drive mechanism of this multifunctional stretcher is in transmission connection with the steering wheel above the power device through a tooth groove, enabling the power device to rotate 90 degrees. At this time, when the power device is started, the lateral movement of the stretcher frame can be achieved.

[0022] (5) The upper stretcher frame of this multifunctional stretcher is supported by two sets of strut mechanisms at the front and rear. Moreover, the support of the two sets of strut mechanisms is controlled by a set of lifting drive mechanism. Therefore, the two sets of strut mechanisms move synchronously and support both ends of the upper stretcher frame, making the lifting more stable and reliable.

[0023] (6) A vertical guiding telescopic rod is also provided between the upper stretcher frame and the lower stretcher frame of this multifunctional stretcher, preventing the upper stretcher frame from shaking due to the clearance in the fit.

[0024] (7) An elastic member is provided between the wheel frame and the stretcher frame of this multifunctional stretcher. The elastic member gives the wheel frame a tendency to move downward, improving the contact between the driving wheels and the ground. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0026] Figure 2 It is Figure 1 a schematic structural diagram of another angle of

[0027] Figure 3 It is a schematic front view structural diagram of the present invention.

[0028] Figure 4 It is Figure 3 a schematic A-A sectional view structural diagram of

[0029] Figure 5 It is a schematic left view structural diagram of the present invention.

[0030] Figure 6 It is Figure 5 a schematic B-B sectional view structural diagram of

[0031] Figure 7 It is Figure 5 a schematic C-C sectional view structural diagram of

[0032] Figure 8 It is Figure 5 a schematic D-D sectional view structural diagram of

[0033] Figure 9 It is Figure 5 a schematic E-E sectional view structural diagram of

[0034] Figure 10 It is a schematic connection structural diagram of the lower stretcher frame of the present invention and the power device after turning 90 degrees.

[0035] Figure 11It is a schematic diagram of the structure of the steering drive mechanism in the present invention.

[0036] Figure 12 for Figure 11 Another angle diagram of the structure.

[0037] Figure 13 It is a schematic diagram of the top view of the structure after the power device, steering wheel and gantry are connected in the present invention.

[0038] Figure 14 for Figure 13 Schematic diagram of the GG cross-sectional structure.

[0039] Figure 15 for Figure 13 Schematic diagram of the HH cross-sectional structure.

[0040] Figure 16 It is a schematic diagram of the connection structure between the power unit and the steering wheel in the present invention.

[0041] Figure 17 for Figure 16 Another angle diagram of the structure.

[0042] Figure 18 It is a schematic diagram of the main structure of the upper bed frame after it is lowered.

[0043] Figure 19 It is a schematic structural diagram of another embodiment of the present invention.

[0044] Figure 20 for Figure 19 Schematic diagram of the structure after the upper bed frame is lowered. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0046] See also Figures 1 to 17 As shown, a multifunctional push bed includes a bed frame 100, a power device 200, a main control circuit and a battery. The bed frame 100 includes an upper bed frame 22 and a lower bed frame 10. The upper bed frame 22 and the lower bed frame 10 are connected by a lifting device. The power device 200, the main control circuit and the battery are arranged on the lower bed frame 10. A caster 11 is provided at the bottom of the lower bed frame 10. The power device 200 includes two sets of walking drive mechanisms. The walking drive mechanism includes a driving wheel 1 and a walking drive motor 2. The driving wheels 1 of the two sets of walking drive mechanisms are located at the bottom of the bed frame 100 and are distributed on the left and the right. The driving wheel 1 is connected to the walking drive motor 2 in a transmission manner. The walking drive motor 2 is electrically connected to the main control circuit. The upper bed frame 22 is provided with an armrest, and a controller for giving a control signal to the main control circuit is provided on the armrest. The controller is electrically connected to the main control circuit, which is not shown in the figure.

[0047] The power device 200 also includes a wheel frame 3, and the two sets of walking drive mechanisms are arranged at the bottom of the wheel frame 3; the wheel frame 3 is horizontally rotated and arranged on the bed frame 100, and a steering drive mechanism 300 for controlling the rotation of the wheel frame 3 is provided on the bed frame 100, and the steering drive mechanism 300 includes a steering drive motor 24, and the steering drive motor 24 is electrically connected to the main control circuit.

[0048] The travel drive mechanism further includes a motor seat 21 and an axle seat 17, which are arranged at the bottom of the wheel frame 3, the travel drive motor 2 is arranged on the motor seat 21, and a rotating shaft 16 is rotatably arranged on the axle seat 17, one end of the rotating shaft 16 is connected to the driving wheel 1, and the other end of the rotating shaft 16 is connected to the travel drive motor 2 through a first pulley transmission pair. The first pulley transmission pair includes a first travel drive gear 20, a first synchronous pulley 18 and a first synchronous belt 19, the first travel drive gear 20 is arranged on the motor shaft of the travel drive motor 2, the first synchronous pulley 18 is arranged on the other end of the rotating shaft 16, and the first synchronous belt 19 is wound around the first travel drive gear 20 and the first synchronous pulley 18.

[0049] The steering drive mechanism 300 includes a steering drive motor 24, a gear pair and a gear frame 26. The gear frame 26 is arranged on the bed frame 100. The steering drive motor 24 and the gear pair are transmission-connected and arranged on the gear frame 26. A steering wheel 4 is provided above the wheel frame 3 corresponding to the bed frame 100. A steering drive tooth groove is provided on the outer periphery of the steering wheel 4, and the steering drive tooth groove is meshed with the gear pair.

[0050] The gear frame 26 is also provided with a reduction box 25, and the gear pair includes a pinion 27 and a gear 28. The steering drive motor 24 is connected to the pinion 27 through the reduction box 25, the pinion 27 is meshed with the gear 28, and the gear 28 is meshed with the steering drive tooth groove of the wheel frame 3.

[0051] Two sets of linear guide devices are provided between the steering wheel 4 and the wheel frame 3. The two sets of linear guide devices are evenly distributed around the rotation center of the steering wheel 4 and are located on the left and right sides of the synchronization shaft 29; the linear guide device includes a longitudinal guide rod 5 and a longitudinal guide sleeve 6. The upper end of the longitudinal guide rod 5 is fixedly connected to the steering wheel 4, and the lower end of the longitudinal guide rod 5 passes through the longitudinal guide sleeve 6. The longitudinal guide sleeve 6 is arranged on the wheel frame 3 and vertically slides with the longitudinal guide rod 5.

[0052] There are more than two adjusting bolts 8 beside the linear guide device. The adjusting bolts 8 pass through the wheel frame 3 from bottom to top and are threadedly connected to the wheel frame 3. The upper end of the adjusting bolt 8 is fixedly abutted against or rotationally matched with the steering wheel 4; the adjusting bolt 8 is also sleeved with a compression spring 7, which is crimped between the steering wheel 4 and the wheel frame 3. The distance between the wheel frame and the steering wheel is changed by adjusting the bolts, so as to adjust the elastic force of the elastic member. The bottom of the bed frame 100 is rectangular and has four casters 11 distributed thereon; the bed frame 100 is rectangular, and the four casters 11 are respectively arranged at the four corners of the bottom of the bed frame 100, and the power device 200 is located in the middle of the bottom of the bed frame. The power device is located at the center of the bottom of the bed frame 100, so that the center of the carrying equipment is more centered, and the center of gravity is lower, which is more stable when used. The bed frame is supported by four casters, and the power device is located in the middle. When there is an angle difference between the positions where the front and rear casters contact the ground, the distance between the middle of the bed frame and the ground changes. At this time, the compression spring 7 makes the wheel frame tend to move downward, ensuring that the driving wheel is in good contact with the ground.

[0053] The bed frame 100 is provided with a gantry 9, a vertical shaft 13 is provided on the inner top surface of the gantry 9, and a steering wheel 4 is connected to the vertical shaft 13 through a bearing 15. The steering wheel 4 is provided with a center hole, a fixed sleeve 14 is provided on the center hole, and the bearing 15 includes an outer ring and an inner ring that are rotatably matched with each other, the outer ring is connected to the fixed sleeve 14, and the inner ring is connected to the outer periphery of the vertical shaft 13.

[0054] The travel drive mechanism further includes a motor seat 21 and an axle seat 17, which are arranged at the bottom of the wheel frame 3, the travel drive motor 2 is arranged on the motor seat 21, and a rotating shaft 16 is rotatably arranged on the axle seat 17, one end of the rotating shaft 16 is connected to the driving wheel 1, and the other end of the rotating shaft 16 is connected to the travel drive motor 2 through a first pulley transmission pair. The first pulley transmission pair includes a first travel drive gear 20, a first synchronous pulley 18 and a first synchronous belt 19, the first travel drive gear 20 is arranged on the motor shaft of the travel drive motor 2, the first synchronous pulley 18 is arranged on the other end of the rotating shaft 16, and the first synchronous belt 19 is wound around the first travel drive gear 20 and the first synchronous pulley 18.

[0055] The wheel frame 3 is plate-shaped, and the motor seats 21 are arranged on the left and right bisectors of the wheel frame 3 , and the two motor seats 21 are distributed front and back.

[0056] The lifting device includes two sets of strut mechanisms and a lifting drive mechanism 400. The two sets of strut mechanisms are respectively arranged at the front and rear ends of the bed frame 100. The strut mechanism includes an inclined strut 23 and a transverse sliding seat 41. The upper end of the inclined strut 23 is hinged to the upper bed frame 22, the lower end of the inclined strut 23 is hinged to the transverse sliding seat 41, and the transverse sliding seat 41 is slidably arranged back and forth on the lower bed frame 10; the lifting drive mechanism 400 includes a lifting drive motor 36 and a sliding seat transmission pair for pushing the transverse sliding seat 41 to move. The lifting drive motor 36 is arranged on the lower bed frame 10 and is in transmission connection with the sliding seat transmission pair, and the lifting drive motor 36 is electrically connected to the main control circuit.

[0057] The sliding seat transmission pair includes a synchronous shaft 29 and two sets of lead screw transmission pairs. The synchronous shaft 29 is rotatably arranged on the lower bed frame 10 and points back and forth. The synchronous shaft 29 passes between the wheel frame 3 and the steering wheel 4. The lead screw transmission pair includes a lead screw 40 and a nut 42 connected by a thread. The lead screw 40 is rotatably arranged on the lower bed frame 10 and points back and forth, and the nut 42 is connected to the transverse sliding seat 41; both ends of the synchronous shaft 29 are respectively in transmission connection with the lead screws 40 of the two sets of lead screw transmission pairs, and the synchronous shaft 29 is also in transmission connection with the lifting drive motor 36.

[0058] The lifting drive motor 36 is located at one end of the synchronous shaft 29. The lifting drive motor 36 is in transmission connection with the synchronous shaft 29 through a driving pulley transmission pair. Both ends of the synchronous shaft 29 are respectively in transmission connection with the lead screw 40 through a driven pulley transmission pair.

[0059] The driving pulley transmission pair includes a driving belt 35, a first driving pulley 34 and a second driving pulley 30; there are two sets of driven pulley transmission pairs, namely a first driven pulley transmission pair and a second driven pulley transmission pair. The first driven pulley transmission pair includes a first driven belt 31, a first upper driven pulley 33 and a first lower driven pulley 32; the second driven pulley transmission pair includes a second driven belt 44, a second upper driven pulley 45 and a second lower driven pulley 43. The first driven pulley transmission pair and the second driven pulley transmission pair are respectively located at both ends of the synchronous shaft 29. The first driving pulley 34 is in transmission connection with the lifting drive motor 36. The second driving pulley 30 and the first upper driven pulley 33 are coaxially arranged and are jointly arranged at one end of the synchronous shaft 29. The driving belt 35 is wound around the first driving pulley 34 and the second driving pulley 30; the first lower driven pulley 32 is arranged on the lead screw 40 of a set of lead screw transmission pairs below the first upper driven pulley 33, and the first driven belt 31 is wound around the first upper driven pulley 33 and the first lower driven pulley 32. The second upper driven pulley 45 is arranged at the other end of the synchronous shaft 29. The second lower driven pulley 43 is arranged on the lead screw 40 of the other set of lead screw transmission pairs below the second upper driven pulley 45, and the second driven belt 44 is wound around the second upper driven pulley 45 and the second lower driven pulley 43.

[0060] At the front and rear ends of the corresponding lead screw 40 of the lower bed frame 10, there are a front limit detection frame 37 and a rear limit detection frame 39. A rising detection switch and a falling detection switch are respectively arranged on the front limit detection frame 37 and the rear limit detection frame 39, which are not shown in the figure. When the nut 42 moves to the positions of the rising detection switch and the falling detection switch, the signals of the rising detection switch and the falling detection switch change to judge whether the upper bed frame 22 is in place for lifting and lowering.

[0061] Each set of strut mechanisms includes two diagonal struts 23, and the two diagonal struts 23 are distributed in parallel, one on the left and the other on the right.

[0062] At the left and right ends of the lower bed frame 10 corresponding to the transverse sliding seat 41, there are transverse guide rods 47. The transverse guide rods 47 point forward and backward. There are sliders 46 on the transverse guide rods 47, and the transverse sliding seat 41 is connected to the sliders 46.

[0063] The transverse guide rods 47 are arranged at the bottom of the lower bed frame 10, and the transverse sliding seat 41 is arranged at the bottom of the sliders 46.

[0064] Between the upper bed frame 22 and the lower bed frame 10, there is also a vertical guide telescopic rod. The vertical guide telescopic rod includes a fixed rod 49 and a movable sleeve 48. The fixed rod 49 and the movable sleeve 48 are both vertically arranged. The lower end of the fixed rod 49 is connected to the lower bed frame 10. The upper end of the fixed rod 49 is sleeved with the movable sleeve 48 and is in perpendicular sliding fit with each other. The upper end of the fixed rod 49 is connected to the upper bed frame 22.

[0065] The above-mentioned upper bed frame 22 and lower bed frame 10 are made of steel. The total weight of the whole stretcher is more than 250 KG. It can be used in combination with a transfer bed. When the patient on the transfer bed is extended towards the stretcher side together, it will not easily cause the stretcher to tip over.

[0066] Its working principle is: When the power device 200 is in Figure 1 the following state: When the two driving wheels 1 rotate in the same direction synchronously, the straight-line walking of the bed frame can be realized; when the two driving wheels 1 rotate with differential speed in the same direction, the bed frame can be steered towards the outer side of the driving wheel 1 with slower walking. When one driving wheel 1 is locked and immobile and the other driving wheel 1 rotates, the bed frame 100 rotates with the locked driving wheel 1 as the center. When the two driving wheels 1 walk in a forward and reverse rotation mode, the bed frame 100 rotates approximately with the center between the two driving wheels 1 as the axis.

[0067] When the power device 200 is in Figure 10 the following state: The main control circuit only allows the two sets of walking drive mechanisms to be jogged, and the two driving wheels 1 move synchronously to realize the lateral movement of the bed frame 100, which is especially suitable when the bed frame needs to be parked on the side.

[0068] When the above-mentioned steering drive mechanism 300 controls the steering of the power device 200, the two sets of traveling drive mechanisms of the power device 200 are in a stopped state, and the power device 200 steers relative to the bed frame 100 (the bed frame 100 is stationary relative to the ground).

[0069] When the lifting drive mechanism 400 controls the front and rear transverse slides 41 to move away from each other, the upper bed frame 22 rises; when the lifting drive mechanism 400 controls the front and rear transverse slides 41 to move relative to each other, the upper bed frame 22 descends, as shown in Figure 18 the figure, which is a schematic structural diagram after the upper bed frame 22 descends.

[0070] Embodiment 2 is different from Embodiment 1 in that: Refer to Figure 19 and Figure 20 shown in the figure, the lifting device includes an upper foot tube 51, a lower foot tube 50, a screw rod and a screw sleeve. The screw rod is rotatably arranged in the lower foot tube 50, and the screw sleeve is arranged in the upper foot tube 51 and is threadedly connected to the screw rod. The cross-sections of the upper foot tube 51 and the lower foot tube 50 are rectangular. The upper foot tube 51 is sleeved with the lower foot tube 50 and is in linear sliding fit. The upper end of the upper foot tube 51 is connected to the upper bed frame 22, and the lower end of the lower foot tube 50 is connected to the lower bed frame 10. At least two sets of front and rear lifting devices are provided, and the screw rods of each set of lifting devices are linked with the lifting drive motor 36. In this embodiment, four sets of lifting devices are provided, and the four sets of lifting devices are distributed in a rectangle. The lifting device of this embodiment looks more concise on the surface.

Claims

1. A multifunctional push bed, comprising a bed frame (100), a power device (200), a main control circuit and a battery, wherein the bed frame (100) comprises an upper bed frame (22) and a lower bed frame (10), the upper bed frame (22) and the lower bed frame (10) are connected via a lifting device, the power device (200), the main control circuit and the battery are arranged on the lower bed frame (10), and casters (11) are arranged at the bottom of the lower bed frame (10). Features: The power device (200) comprises two sets of travel drive mechanisms, the travel drive mechanisms comprising drive wheels (1) and travel drive motors (2), the drive wheels (1) of the two sets of travel drive mechanisms being located at the bottom of the bed frame (100) and distributed on the left and right sides, the drive wheels (1) being transmission-connected to the travel drive motors (2), and the travel drive motors (2) being electrically connected to the main control circuit; The upper bed frame (22) is provided with an armrest, and the armrest is provided with a controller for sending control signals to the main control circuit, and the controller is electrically connected to the main control circuit; and also includes a remote controller for sending control signals to the main control circuit, and the remote controller is electrically connected to the main control circuit; The power device (200) further comprises a wheel frame (3), the two sets of travel drive mechanisms being arranged at the bottom of the wheel frame (3); the wheel frame (3) being arranged on the bed frame (100) for horizontal rotation, the bed frame (100) being provided with a steering drive mechanism (300) for controlling the rotation of the wheel frame (3), the steering drive mechanism (300) comprising a steering drive motor (24), the steering drive motor (24) being electrically connected to a main control circuit; The steering drive mechanism (300) comprises a steering drive motor (24), a gear pair and a gear frame (26); the gear frame (26) is arranged on the bed frame (100); the steering drive motor (24) and the gear pair are transmission-connected and arranged on the gear frame (26); a steering wheel (4) is arranged above the wheel frame (3) corresponding to the bed frame (100); a steering drive tooth groove is arranged on the outer periphery of the steering wheel (4); the steering drive tooth groove is meshed with the gear pair; The lifting device comprises two groups of support rod mechanisms and a lifting drive mechanism (400), the two groups of support rod mechanisms are respectively arranged at the front and rear ends of the bed frame (100), the support rod mechanism comprises an oblique support rod (23) and a transverse slide (41), the upper end of the oblique support rod (23) is hinged to the upper bed frame (22), the lower end of the oblique support rod (23) is hinged to the transverse slide (41), and the transverse slide (41) is slidably arranged on the lower bed frame (10) forward and backward; the lifting drive mechanism (400) comprises a lifting drive motor (36) and a slide transmission pair for driving the transverse slide (41) to move, the lifting drive motor (36) is arranged on the lower bed frame (10) and is transmission-connected to the slide transmission pair, and the lifting drive motor (36) is electrically connected to the main control circuit; A vertical guiding telescopic rod is further provided between the upper bed frame (22) and the lower bed frame (10). The vertical guiding telescopic rod includes a fixed rod (49) and a movable sleeve (48). The fixed rod (49) and the movable sleeve (48) are both vertically arranged. The lower end of the fixed rod (49) is connected to the lower bed frame (10), the upper end of the fixed rod (49) is sleeved with the movable sleeve (48) and is in perpendicular sliding fit therewith, and the upper end of the fixed rod (49) is connected to the upper bed frame (22).

2. The multifunctional push bed according to claim 1, characterized in that: The walking driving mechanism further includes a motor base (21) and a shaft seat (17). The motor base (21) and the shaft seat (17) are arranged at the bottom of the wheel frame (3). The walking driving motor (2) is arranged on the motor base (21). A rotating shaft (16) is rotatably arranged on the shaft seat (17). One end of the rotating shaft (16) is in transmission connection with the driving wheel (1), and the other end of the rotating shaft (16) is in transmission connection with the walking driving motor (2) through a first pulley transmission pair.

3. The multifunctional push bed according to claim 1, characterized in that: A speed reducer (25) is further provided on the gear frame (26). The gear pair includes a small gear (27) and a large gear (28). The steering driving motor (24) is in transmission connection with the small gear (27) through the speed reducer (25). The small gear (27) meshes with the large gear (28), and the large gear (28) meshes with the steering driving tooth groove of the wheel frame (3).

4. The multifunctional push bed according to claim 1, characterized in that: The sliding seat transmission pair includes a synchronous shaft (29) and two sets of lead screw transmission pairs. The synchronous shaft (29) is rotatably arranged on the lower bed frame (10) and points forward and backward. The synchronous shaft (29) passes between the wheel frame (3) and the steering wheel (4). The lead screw transmission pair includes a lead screw (40) and a nut (42) connected by threads. The lead screw (40) is rotatably arranged on the lower bed frame (10) and points forward and backward. The nut (42) is connected to the transverse sliding seat (41). Both ends of the synchronous shaft (29) are in transmission connection with the lead screws (40) of the two sets of lead screw transmission pairs respectively, and the synchronous shaft (29) is also in transmission connection with the lifting driving motor (36).

5. The multifunctional push bed according to claim 4, characterized in that: Two sets of linear guiding devices are provided between the steering wheel (4) and the wheel frame (3). The two sets of linear guiding devices are evenly distributed around the rotation center of the steering wheel (4) and are located on the left and right sides of the synchronous shaft (29). The linear guiding device includes a longitudinal guiding rod (5) and a longitudinal guiding sleeve (6). The upper end of the longitudinal guiding rod (5) is fixedly connected to the steering wheel (4), the lower end of the longitudinal guiding rod (5) passes through the longitudinal guiding sleeve (6), and the longitudinal guiding sleeve (6) is arranged on the wheel frame (3) and is in perpendicular sliding fit with the longitudinal guiding rod (5).

6. The multifunctional push bed according to claim 5, characterized in that: There are more than two adjusting bolts (8) provided beside the linear guiding device. The adjusting bolts (8) pass through the wheel carrier (3) from bottom to top and are threadedly connected to the wheel carrier (3). The upper end of the adjusting bolt (8) is fixedly abutted or rotationally engaged with the steering wheel (4); a compression spring (7) is also sleeved outside the adjusting bolt (8), and the compression spring (7) is press-fitted between the steering wheel (4) and the wheel carrier (3).

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