CN110742739B

CN110742739B - Multifunctional trolley

Info

Publication number: CN110742739B
Application number: CN201911243597.1A
Authority: CN
Inventors: 吕鸿钧; 林尚雷; 黄乐军; 吕鸿雁; 黄勇军
Original assignee: Guangzhou Wolin Medical Equipment Co ltd
Current assignee: Guangzhou Wolin Medical Equipment Co ltd
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2025-05-27
Anticipated expiration: 2039-12-06
Also published as: CN110742739A

Abstract

The invention relates to a multifunctional pushing bed which comprises a bed frame, a power device, a main control circuit and a battery, wherein the bed frame comprises an upper bed frame and a lower bed frame, the upper bed frame and the lower bed frame are connected through 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, the power device comprises two sets of walking driving mechanisms, each walking driving mechanism comprises driving wheels and a walking driving motor, the driving wheels of the two sets of walking driving mechanisms are positioned at the bottom of the bed frame and distributed left and right, the driving wheels are in transmission connection with the walking driving motor, and the walking driving motor is electrically connected with the main control circuit. The multifunctional pushing bed has the functions of electric power assisting and upper bed frame lifting control, and the two driving wheels of the electric power assisting are controlled by one walking driving motor respectively, so that the two driving wheels can be controlled independently, when the two driving wheels are synchronous, the pushing bed can be driven in a straight line, and when the two driving wheels run in a differential mode, the pushing bed can steer and walk.

Description

Multifunctional pushing bed

Technical Field

The invention relates to a carrier, in particular to a multifunctional pushing bed.

Background

The current medical care transfer bed mainly comprises a lower bed frame, an upper bed frame and universal casters, wherein 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 bedstead is mainly used for placing a mattress and lying down a patient, and the lower bedstead can be used for placing medical equipment. Therefore, when the medical care transfer bed carries people, the medical care transfer bed needs to be pushed to be hard, and one person operates the medical care transfer bed, so that the walking direction of the medical care transfer bed is not easy to control. In addition, because patients with inconvenient actions often need to be checked more during hospitalization, and different detection projects are located in different areas, the existing hospitals generally need to arrange two carers (or arrange one carer and require the family members of the patients to accompany) to transport the patients to different detection areas through the medical care transfer bed for detection, so that more manpower is consumed, and the hospitalization cost is increased.

In addition, the current medical care transfer bed is mainly used for transferring patients with inconvenient actions on sickbeds in wards to other departments, and the medical care transfer bed is not necessarily similar to the sickbeds in wards in height, so that the patients are difficult to pass through the bed. Moreover, the upper bed frame is higher, which is not beneficial to the patient to get on bed.

Disclosure of Invention

The invention aims to provide a multifunctional pushing bed which is reasonable in structure, electrically assisted and electrically provided with a lifting function.

The purpose of the invention is realized in the following way:

The multifunctional pushing bed is characterized in that the power device comprises two sets of traveling driving mechanisms, each traveling driving mechanism comprises driving wheels and a traveling driving motor, the driving wheels of the two sets of traveling driving mechanisms are located at the bottom of the bed frame and distributed left and right, the driving wheels are in transmission connection with the traveling driving motors, the traveling driving motors are in electric connection with the main control circuit, an armrest is arranged on the upper bed frame, a controller for controlling signals of the main control circuit is arranged on the armrest, the controller is in electric connection with the main control circuit, and a remote controller for sending control signals to the main control circuit is further included.

The aim of the invention can be also solved by adopting the following technical measures:

The power device further comprises a wheel frame, the two sets of walking driving mechanisms are arranged at the bottom of the wheel frame, the wheel frame is horizontally and rotatably arranged on the bedstead, the bedstead is provided with a steering driving mechanism for controlling the wheel frame to rotate, and the steering driving mechanism comprises a steering driving motor which is electrically connected with the main control circuit.

As a further scheme, the walking driving mechanism further comprises a motor base and a shaft seat, wherein the motor base and the shaft seat are arranged at the bottom of the wheel frame, the walking driving motor is arranged on the motor base, a rotating shaft is rotationally 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 walking driving motor through a first belt pulley transmission pair.

As a further scheme, the steering driving mechanism comprises a steering driving motor, a gear pair and a gear frame, wherein the gear frame is arranged on a bedstead, the steering driving motor is in transmission connection with the gear pair and is arranged on the gear frame, a steering wheel is arranged above the bedstead corresponding to the gear frame, steering driving tooth grooves are formed in the periphery of the steering wheel, and the steering driving tooth grooves are meshed with the gear pair.

As a further scheme, a reduction gearbox is further arranged on the gear frame, the gear pair comprises a pinion and a large gear, the steering driving motor is in transmission connection with the pinion through the reduction gearbox, the pinion is meshed with the large gear, and the large gear is meshed with the steering driving tooth socket of the gear frame.

As a further scheme, the lifting device comprises two groups of stay bar mechanisms and a lifting driving mechanism, wherein the two groups of stay bar mechanisms are respectively arranged at the front end and the rear end of the bedstead, the stay bar mechanisms comprise inclined stay bars and transverse sliding seats, the upper ends of the inclined stay bars are hinged with the upper bedstead, the lower ends of the inclined stay bars are hinged with the transverse sliding seats, the transverse sliding seats are arranged on the lower bedstead in a front-rear sliding manner, the lifting driving mechanism comprises a lifting driving motor and a sliding seat transmission pair for pushing the transverse sliding seats to move, the lifting driving motor is arranged on the lower bedstead and is in transmission connection with the sliding seat transmission pair, and the lifting driving motor is electrically connected with a main control circuit. Or the lifting device comprises an upper foot tube, a lower foot tube, a screw rod and a screw sleeve, wherein the screw rod is rotationally 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 is sleeved with the lower foot tube and is in linear sliding fit, the upper end of the upper foot tube is connected with an upper bedstead, the lower end of the lower foot tube is connected with a lower bedstead, the lifting device is at least provided with a front set and a rear set, and the screw rods of the lifting devices of each set are linked with a lifting driving motor.

As a further scheme, the slide seat transmission pair comprises a synchronizing shaft and two sets of screw rod transmission pairs, wherein the synchronizing shaft is rotatably arranged on the lower bed frame and points forwards and backwards, the synchronizing shaft penetrates through the space between the wheel frame and the steering wheel, the screw rod transmission pair comprises a screw rod and a nut which are in threaded connection, the screw rod is rotatably arranged on the lower bed frame and points forwards and backwards, the nut is connected with the transverse slide seat, two ends of the synchronizing shaft are respectively connected with the screw rods of the two sets of screw rod transmission pairs in a transmission manner, and the synchronizing shaft is also in transmission connection with the lifting driving motor.

As a further scheme, still be equipped with perpendicular direction telescopic link between upper bedstead and the lower bedstead, perpendicular direction telescopic link includes dead lever and movable sleeve, and dead lever and movable sleeve all set up perpendicularly, and the dead lever lower extreme is connected with the lower bedstead, and the dead lever upper end cup joints with movable sleeve and mutually perpendicular sliding fit, and the upper end and the upper bedstead of dead lever are connected.

The steering wheel is characterized in that two sets of linear guide devices are arranged between the steering wheel and the wheel frame, the two sets of linear guide devices are uniformly distributed around the rotation center of the steering wheel and are positioned at the left side and the right side of the synchronous shaft, the linear guide devices comprise longitudinal guide rods and longitudinal guide sleeves, the upper ends of the longitudinal guide rods are fixedly connected with the steering wheel, the lower ends of the longitudinal guide rods penetrate through the longitudinal guide sleeves, and the longitudinal guide sleeves are arranged on the wheel frame and vertically and slidably matched with the longitudinal guide rods.

As a further scheme, more than two adjusting bolts are arranged beside the linear guide device, pass through the wheel frame from bottom to top and are in threaded connection with the wheel frame, the upper ends of the adjusting bolts are fixedly abutted or in running fit with the steering wheel, a compression spring is sleeved outside the adjusting bolts, and the compression spring is in compression joint between the steering wheel and the wheel frame.

The beneficial effects of the invention are as follows:

(1) The multifunctional pushing bed has the functions of electric power assisting and upper bed frame lifting control, and the two driving wheels of the electric power assisting are controlled by one walking driving motor respectively, so that the two driving wheels can be controlled independently, when the two driving wheels are synchronous, the pushing bed can be driven in a straight line, and when the two driving wheels run in a differential mode, the pushing bed can steer and walk.

(2) The multifunctional pushing bed can directly control the power device to steer through the steering driving mechanism, namely, the steering of the bed frame is realized, the operation is convenient, and even if the bed frame is in a loading state, a single person can easily drive.

(3) The steering driving mechanism of the multifunctional pushing bed is driven by electric power, and the operation is lighter.

(4) The steering driving mechanism of the multifunctional pushing bed is in transmission with the steering wheel above the power device through the tooth socket, so that the power device can rotate 90 degrees, and the power device is started at the moment, so that the bed frame can move transversely.

(5) The upper bed frame of the multifunctional pushing bed is supported by the front supporting rod mechanism and the rear supporting rod mechanism, and the supporting of the two supporting rod mechanisms is controlled by the lifting driving mechanism, so that the two supporting rod mechanisms synchronously move, and the two ends of the upper bed frame are supported, so that the lifting is stable and reliable.

(6) The vertical guiding telescopic rod is further arranged between the upper bed frame and the lower bed frame of the multifunctional pushing bed, so that the upper bed frame cannot shake due to the matched virtual position.

(7) According to the multifunctional pushing bed, the elastic piece is arranged between the wheel frame and the bed frame, the elastic piece enables the wheel frame to have a downward movement trend, and the driving wheel is better in contact with the ground.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic view of another angle structure of fig. 1.

Fig. 3 is a schematic diagram of a front view structure of the present invention.

Fig. 4 is a schematic view of the cross-sectional A-A structure of fig. 3.

Fig. 5 is a schematic left-view structure of the present invention.

Fig. 6 is a schematic view of the cross-sectional B-B structure of fig. 5.

FIG. 7 is a schematic view of the C-C cross-sectional structure of FIG. 5.

Fig. 8 is a schematic view of the D-D cross-sectional structure of fig. 5.

Fig. 9 is a schematic view of the E-E cross-sectional structure of fig. 5.

Fig. 10 is a schematic view of the connection structure of the power device of the present invention after the lower frame is turned 90 degrees.

Fig. 11 is a schematic structural view of a steering driving mechanism according to the present invention.

Fig. 12 is another angular structure diagram of fig. 11.

Fig. 13 is a schematic top view of the power unit, steering wheel and portal frame of the present invention after connection.

Fig. 14 is a schematic diagram of the sectional structure of G-G of fig. 13.

Fig. 15 is a schematic view of the H-H cross-sectional structure of fig. 13.

Fig. 16 is a schematic view showing a connection structure of a power unit and a steering wheel in the present invention.

Fig. 17 is another angular structure diagram of fig. 16.

Fig. 18 is a schematic view showing a front view of the upper frame of the present invention after it is lowered.

Fig. 19 is a schematic structural view of another embodiment of the present invention.

Fig. 20 is a schematic view showing a structure of the upper frame of fig. 19 after being lowered.

Detailed Description

The invention is further described below with reference to the drawings and examples.

Referring to fig. 1 to 17, a multifunctional pushing bed comprises 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 through a lifting device, the power device 200, the main control circuit and the battery are arranged on the lower bed frame 10, casters 11 are arranged at the bottom of the lower bed frame 10, the power device 200 comprises two sets of traveling driving mechanisms, each traveling driving mechanism comprises a driving wheel 1 and a traveling driving motor 2, the driving wheels 1 of the two sets of traveling driving mechanisms are positioned at the bottom of the bed frame 100 and distributed left and right, the driving wheels 1 are in transmission connection with the traveling driving motor 2, the traveling driving motor 2 is electrically connected with the main control circuit, a handrail is arranged on the upper bed frame 22, and a controller for controlling signals to the main control circuit is electrically connected with the main control circuit, and is not shown in the figure.

The power device 200 further comprises a wheel frame 3, the two sets of traveling driving mechanisms are arranged at the bottom of the wheel frame 3, the wheel frame 3 is horizontally and rotatably arranged on the bed frame 100, a steering driving mechanism 300 for controlling the wheel frame 3 to rotate is arranged on the bed frame 100, the steering driving mechanism 300 comprises a steering driving motor 24, and the steering driving motor 24 is electrically connected with a main control circuit.

The walking driving mechanism further comprises a motor seat 21 and a shaft seat 17, the motor seat 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 seat 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 belt pulley transmission pair. The first pulley transmission pair comprises a first walking driving gear 20, a first synchronous pulley 18 and a first synchronous belt 19, wherein the first walking driving gear 20 is arranged on a motor shaft of the walking driving 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 outside the first walking driving gear 20 and the first synchronous pulley 18.

The steering driving mechanism 300 comprises a steering driving motor 24, a gear pair and a gear frame 26, the gear frame 26 is arranged on a bed frame 100, the steering driving motor 24 and the gear pair are in transmission connection and are arranged on the gear frame 26, a steering wheel 4 is arranged above the bed frame 100 corresponding to the wheel frame 3, steering driving tooth grooves are formed in the periphery of the steering wheel 4, and the steering driving tooth grooves are meshed with the gear pair.

The gear rack 26 is also provided with a reduction gearbox 25, the gear pair comprises a pinion 27 and a large gear 28, the steering driving motor 24 is in transmission connection with the pinion 27 through the reduction gearbox 25, the pinion 27 is meshed with the large gear 28, and the large gear 28 is meshed with the steering driving tooth socket of the wheel rack 3.

Two sets of linear guide devices are arranged between the steering wheel 4 and the wheel frame 3, the two sets of linear guide devices are uniformly distributed around the rotation center of the steering wheel 4 and are positioned at the left side and the right side of the synchronous shaft 29, the linear guide devices comprise a longitudinal guide rod 5 and a longitudinal guide sleeve 6, the upper end of the longitudinal guide rod 5 is fixedly connected with the steering wheel 4, the lower end of the longitudinal guide rod 5 penetrates through the longitudinal guide sleeve 6, and the longitudinal guide sleeve 6 is arranged on the wheel frame 3 and is vertically and slidably matched with the longitudinal guide rod 5.

The linear guide device is provided with more than two adjusting bolts 8 beside the linear guide device, the adjusting bolts 8 penetrate through the wheel frame 3 from bottom to top and are in threaded connection with the wheel frame 3, the upper ends of the adjusting bolts 8 are fixedly abutted against or in running fit with the steering wheel 4, the compressing springs 7 are sleeved outside the adjusting bolts 8, and the compressing springs 7 are in compression joint between the steering wheel 4 and the wheel frame 3. The distance between the wheel frame and the steering wheel is changed through the adjusting bolt, so that the elastic force of the elastic piece is adjusted. Four casters 11 are distributed on the bottom of the bedstead 100 in a rectangular shape, the bedstead 100 is in a rectangular shape, the four casters 11 are respectively arranged at four corners of the bottom of the bedstead 100, and the power device 200 is positioned in the middle of the bottom of the bedstead. The power device is positioned at the center of the bottom of the bed frame 100, so that the center of the carrying device is more centered, the center of gravity is lower, and the use is more stable. The bedstead is supported by four truckles, and power device is located the middle part, and when there is the angle difference in the position of front and back both ends truckle and ground contact, the distance between bedstead middle part and the ground changes, and at this moment, compression spring 7 makes the wheel carrier have the trend of downward movement, ensures that the drive wheel and ground contact well.

The bed frame 100 is provided with a portal frame 9, the inner top surface of the portal frame 9 is provided with a vertical shaft 13, and the steering wheel 4 is connected with the vertical shaft 13 through a bearing 15. The steering wheel 4 is provided with a central hole, a fixed sleeve 14 is arranged on the central hole, a bearing 15 comprises an outer ring and an inner ring which are in mutual rotation fit, the outer ring is connected with the fixed sleeve 14, and the inner ring is connected with the periphery of the vertical shaft 13.

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

The lifting device comprises two groups of stay bar mechanisms and a lifting driving mechanism 400, wherein the two groups of stay bar mechanisms are respectively arranged at the front end and the rear end of the bedstead 100, each stay bar mechanism comprises an inclined stay bar 23 and a transverse sliding seat 41, the upper end of the inclined stay bar 23 is hinged with the upper bedstead 22, the lower end of the inclined stay bar 23 is hinged with the transverse sliding seat 41, the transverse sliding seat 41 is arranged on the lower bedstead 10 in a sliding manner, the lifting driving mechanism 400 comprises a lifting driving motor 36 and a sliding seat transmission pair for pushing the transverse sliding seat 41 to move, the lifting driving motor 36 is arranged on the lower bedstead 10 and is in transmission connection with the sliding seat transmission pair, and the lifting driving motor 36 is electrically connected with a main control circuit.

The slide seat transmission pair comprises a synchronizing shaft 29 and two sets of screw transmission pairs, the synchronizing shaft 29 is rotatably arranged on the lower bedstead 10 and points forwards and backwards, the synchronizing shaft 29 penetrates through the space between the wheel frame 3 and the steering wheel 4, the screw transmission pair comprises a screw 40 and a nut 42 which are in threaded connection, the screw 40 is rotatably arranged on the lower bedstead 10 and points forwards and backwards, the nut 42 is connected with the transverse slide seat 41, two ends of the synchronizing shaft 29 are respectively connected with the screw 40 of the two sets of screw transmission pairs in a transmission manner, and the synchronizing shaft 29 is also connected with the lifting driving motor 36 in a transmission manner.

The lifting driving motor 36 is positioned at one end of the synchronizing shaft 29, the lifting driving motor 36 is in transmission connection with the synchronizing shaft 29 through a driving pulley transmission pair, and two ends of the synchronizing shaft 29 are respectively in transmission connection with the screw rod 40 through a driven pulley transmission pair.

The driving pulley transmission pair comprises a driving belt 35, a first driving pulley 34 and a second driving pulley 30, two driven pulley transmission pairs are respectively arranged, the first driven pulley transmission pair comprises a first driven belt 31, a first upper driven pulley 33 and a first lower driven pulley 32, and the second driven pulley transmission pair comprises 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 positioned at two ends of the synchronous shaft 29, the first driven pulley 34 is in transmission connection with the lifting driving motor 36, the second driven pulley 30 and the first upper driven pulley 33 are coaxially arranged and jointly arranged at one end of the synchronous shaft 29, the driving belt 35 is wound outside the first driven pulley 34 and the second driven pulley 30, the first lower driven pulley 32 is arranged on a screw rod 40 of a set of screw transmission pair below the first upper driven pulley 33, and the first driven belt 31 is wound outside the first upper driven pulley 33 and the first lower driven pulley 32. The second upper driven pulley 45 is disposed at the other end of the synchronizing shaft 29, the second lower driven pulley 43 is disposed on the screw 40 of the other set of screw transmission pair 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.

Front limit detection frames 37 and rear limit detection frames 39 are arranged at the front end and the rear end of the lower bedstead 10 corresponding to the screw rods 40. The front limit detecting frame 37 and the rear limit detecting frame 39 are respectively provided with a lifting detecting switch and a lowering detecting switch, which are not shown in the figure. When the nut 42 moves to the lift detection switch and the descent detection switch, the signals of the lift detection switch and the descent detection switch are changed to determine whether the upper frame 22 is lifted in place.

Each group of stay bar mechanism comprises two diagonal stay bars 23, and the two diagonal stay bars 23 are distributed in parallel left and right.

The lower bed frame 10 is provided with transverse guide rods 47 at the left and right ends corresponding to the transverse sliding seat 41, the transverse guide rods 47 are directed forwards and backwards, the transverse guide rods 47 are provided with sliding blocks 46, and the transverse sliding seat 41 is connected with the sliding blocks 46.

The transverse guide rod 47 is arranged at the bottom of the lower bed frame 10, and the transverse sliding seat 41 is arranged at the bottom of the sliding block 46.

A vertical guiding telescopic rod is further arranged between the upper bed frame 22 and the lower bed frame 10, the vertical guiding telescopic rod comprises a fixed rod 49 and a movable sleeve 48, the fixed rod 49 and the movable sleeve 48 are vertically arranged, the lower end of the fixed rod 49 is connected with the lower bed frame 10, the upper end of the fixed rod 49 is sleeved with the movable sleeve 48 and is in vertical sliding fit with the movable sleeve 48, and the upper end of the fixed rod 49 is connected with the upper bed frame 22.

The upper bed frame 22 and the lower bed frame 10 are made of steel, the total weight of the whole pushing bed is more than 250KG, the whole pushing bed can be matched with a transfer bed, the transfer bed stretches out to one side of the pushing bed together with a patient, and the side turning of the pushing bed cannot be easily caused.

The working principle of the device is that when the power device 200 is in the state of fig. 1, the device can realize straight line walking of the bed frame when the two driving wheels 1 are synchronous in the same direction, and can realize steering of the bed frame to the outer side direction of the driving wheel 1 with slow walking when the two driving wheels 1 run in the same direction and differential speed. When one driving wheel 1 is locked and the other driving wheel 1 rotates, the bed frame 100 turns around the locked driving wheel 1 as a center of a circle. When the two driving wheels 1 travel in a forward and reverse manner, the bed frame 100 rotates about the center between the two driving wheels 1 as the axis.

When the power device 200 is in the state of fig. 10, the main control circuit only allows the two sets of walking driving mechanisms to click, and the two driving wheels 1 synchronously move, so that the lateral movement of the bed frame 100 is realized, and the power device is particularly suitable for being used when the bed frame is required to be berthed by leaning on the side.

When the steering driving mechanism 300 controls the power unit 200 to steer, the two sets of traveling driving mechanisms of the power unit 200 are stopped, and the power unit 200 steers relative to the frame 100 (the frame 100 is not moving relative to the ground).

When the lifting driving mechanism 400 controls the front and rear horizontal sliding seats 41 to move back, the upper bed frame 22 rises, and when the lifting driving mechanism 400 controls the front and rear horizontal sliding seats 41 to move relatively, the upper bed frame 22 descends, as shown in fig. 18, and the upper bed frame 22 is structurally schematic after descending.

The difference between the second embodiment and the first embodiment is that, as shown in fig. 19 and fig. 20, the lifting device includes an upper leg tube 51, a lower leg tube 50, a screw rod and a screw sleeve, the screw rod is rotatably disposed in the lower leg tube 50, the screw sleeve is disposed in the upper leg tube 51 and is in threaded connection with the screw rod, the cross sections of the upper leg tube 51 and the lower leg tube 50 are rectangular, the upper leg tube 51 is sleeved with the lower leg tube 50 and is in linear sliding fit, the upper end of the upper leg tube 51 is connected with the upper bed frame 22, the lower end of the lower leg tube 50 is connected with the lower bed frame 10, the lifting device is at least provided with a front set and a rear set, and the screw rod of each set of lifting device is linked with the lifting driving motor 36. In the embodiment, four sets of lifting devices are arranged, and the four sets of lifting devices are distributed in a rectangular shape. The surface of the lifting device of this embodiment appears more compact.

Claims

1. The multifunctional pushing bed comprises 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 through 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), the multifunctional pushing bed is characterized in that the power device (200) comprises two sets of walking driving mechanisms, each walking driving mechanism comprises driving wheels (1) and a walking driving motor (2), the driving wheels (1) of the two sets of walking driving mechanisms are positioned at the bottom of the bed frame (100) and distributed left and right, the driving wheels (1) are in transmission connection with the walking driving motors (2), and the walking driving motors (2) are electrically connected with the main control circuit;

The upper bed frame (22) is provided with an armrest, a controller for controlling signals of the main control circuit is arranged on the armrest, and the controller is electrically connected with the main control circuit;

The power device (200) further comprises a wheel frame (3), wherein the two sets of traveling driving mechanisms are arranged at the bottom of the wheel frame (3), the wheel frame (3) is horizontally and rotatably arranged on the bed frame (100), a steering driving mechanism (300) for controlling the wheel frame (3) to rotate is arranged on the bed frame (100), the steering driving mechanism (300) comprises a steering driving motor (24), and the steering driving motor (24) is electrically connected with a main control circuit;

The steering driving mechanism (300) comprises a steering driving motor (24), a gear pair and a gear rack (26), wherein the gear rack (26) is arranged on a bed frame (100), the steering driving motor (24) is in transmission connection with the gear pair and is arranged on the gear rack (26), a steering wheel (4) is arranged above the bed frame (100) corresponding to the wheel rack (3), steering driving tooth grooves are formed in the periphery of the steering wheel (4), and the steering driving tooth grooves are meshed with the gear pair;

The lifting device comprises two groups of stay bar mechanisms and a lifting driving mechanism (400), wherein the two groups of stay bar mechanisms are respectively arranged at the front end and the rear end of the bed frame (100), each stay bar mechanism comprises an inclined stay bar (23) and a transverse sliding seat (41), the upper end of each inclined stay bar (23) is hinged with the upper bed frame (22), the lower end of each inclined stay bar (23) is hinged with the transverse sliding seat (41), the transverse sliding seat (41) is arranged on the lower bed frame (10) in a front-back sliding manner, the lifting driving mechanism (400) comprises a lifting driving motor (36) and a sliding seat transmission pair for pushing the transverse sliding seat (41) to move, and the lifting driving motor (36) is arranged on the lower bed frame (10) and is in transmission connection with the sliding seat transmission pair;

The utility model discloses a bed frame, including upper bedstead (22), lower bedstead (10), upper bedstead (22), lower bedstead (10) are equipped with the perpendicular direction telescopic link, and the perpendicular direction telescopic link includes dead lever (49) and movable sleeve (48), and dead lever (49) and movable sleeve (48) all set up perpendicularly, and dead lever (49) lower extreme is connected with lower bedstead (10), and dead lever (49) upper end cup joints and mutually perpendicular sliding fit with movable sleeve (48), and the upper end of dead lever (49) is connected with upper bedstead (22).

2. The multifunctional pushing bed of claim 1, wherein the walking driving mechanism further comprises 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 belt pulley transmission pair.

3. The multifunctional pushing bed according to claim 1, wherein the gear rack (26) is further provided with a reduction gearbox (25), the gear pair comprises a pinion (27) and a large gear (28), the steering driving motor (24) is in transmission connection with the pinion (27) through the reduction gearbox (25), the pinion (27) is meshed with the large gear (28), and the large gear (28) is meshed with the steering driving tooth socket of the wheel rack (3).

4. The multifunctional pushing bed according to claim 1, wherein the sliding seat transmission pair comprises a synchronizing shaft (29) and two sets of screw transmission pairs, the synchronizing shaft (29) is rotatably arranged on the lower bed frame (10) and points forwards and backwards, the synchronizing shaft (29) penetrates through the space between the wheel frame (3) and the steering wheel (4), the screw transmission pair comprises a screw rod (40) and a nut (42) which are in threaded connection, the screw rod (40) is rotatably arranged on the lower bed frame (10) and points forwards and backwards, the nut (42) is connected with the transverse sliding seat (41), two ends of the synchronizing shaft (29) are respectively in transmission connection with the screw rods (40) of the two sets of screw transmission pairs, and the synchronizing shaft (29) is also in transmission connection with the lifting driving motor (36).

5. The multifunctional pushing bed according to claim 4, wherein two sets of linear guide devices are arranged between the steering wheel (4) and the wheel frame (3), the two sets of linear guide devices are uniformly distributed around the rotation center of the steering wheel (4) and are positioned at the left side and the right side of the synchronous shaft (29), the linear guide devices comprise longitudinal guide rods (5) and longitudinal guide sleeves (6), the upper ends of the longitudinal guide rods (5) are fixedly connected with the steering wheel (4), the lower ends of the longitudinal guide rods (5) penetrate through the longitudinal guide sleeves (6), and the longitudinal guide sleeves (6) are arranged on the wheel frame (3) and are vertically and slidably matched with the longitudinal guide rods (5).

6. The multifunctional pushing bed according to claim 5, wherein more than two adjusting bolts (8) are arranged beside the linear guide device, the adjusting bolts (8) penetrate through the wheel frame (3) from bottom to top and are in threaded connection with the wheel frame (3), the upper ends of the adjusting bolts (8) are fixedly abutted against or in running fit with the steering wheel (4), compression springs (7) are sleeved outside the adjusting bolts (8), and the compression springs (7) are in pressure connection between the steering wheel (4) and the wheel frame (3).