CN111166568B

CN111166568B - Shifting vehicle

Info

Publication number: CN111166568B
Application number: CN202010037878.8A
Authority: CN
Inventors: 李淼; 邓伟民
Original assignee: Peilin Medical Technology Guangzhou Co ltd
Current assignee: Peilin Medical Technology Guangzhou Co ltd
Priority date: 2020-01-14
Filing date: 2020-01-14
Publication date: 2024-10-11
Anticipated expiration: 2040-01-14
Also published as: CN111166568A

Abstract

The invention discloses a shifting vehicle, which comprises a vehicle body with a lifting mechanism and universal casters, and a movable bed board mechanism for transversely moving and taking over patients; the movable bed board mechanism is arranged on a frame of the vehicle body; the movable bed board mechanism comprises a cloth rolling shaft frame, a cloth rolling shaft, a terminal head seat body, an upper movable board, upper movable cloth, a lower movable board, lower movable cloth, a first sprocket assembly and a ratchet assembly. The invention has the core that the first sprocket assembly, the ratchet assembly and the first sprocket motor are arranged to replace the prior transmission mode of the common cooperation of the clutch gear, the long rack, the clutch and the clutch driving mechanism, so that the transmission structure of the movable bed plate mechanism is greatly simplified, the structure of the shifting vehicle is more compact, the transmission is smoother, the operation of the shifting vehicle is more humanized, and the position of a patient is corrected when necessary.

Description

Shifting vehicle

Technical Field

The present invention relates to a transport vehicle technology for loading and unloading patients, and more particularly, to a medical patient transfer cart suitable for use in hospitals to handle post-operative patients or to handle patients that are susceptible to re-injury during handling.

Background

Currently, a shift cart is used for moving and transferring a patient with inconvenient postoperative movement before and after operation, the patient is moved to the shift cart from a sickbed, and then the patient is moved to an operating table or equipment requiring examination/treatment by the shift cart, or is reversely transferred. Especially, when aiming at a patient with a wound or a patient after serious vertebra, cervical vertebra and thoracic vertebra operations, the birth of the shifting cart reduces the labor intensity of medical staff, avoids secondary injuries possibly caused by a plurality of times of movement of the patient during the transportation period before and after the operation, and can lead to the traction of the wound or focus, thereby causing great pain to the patient and being unfavorable for the healing of the wound after the operation.

The shifting vehicle sold or used in the market mainly comprises two parts, wherein one part is a vehicle body for moving, and the other part is a movable bed board mechanism for transversely moving and taking in patients; the medical patient transfer cart disclosed in chinese patent 200610052776.3 adopts a double-layer combined structure of an upper moving frame/upper moving cloth and a lower moving frame/lower moving cloth, and specifically comprises a cloth rolling shaft frame, a cloth rolling shaft, a terminal head seat body, a clutch gear, an upper moving frame/upper moving cloth, a lower moving frame/lower moving cloth, and the like. However, this displacement truck has the following drawbacks:

The mode of realizing the rotation or stopping the rotation of the cloth rolling shaft adopts the common cooperation of a clutch gear, a long rack, a clutch and a clutch driving mechanism, as shown in the accompanying drawings 16-17 of the patent specification, the defects are that the design structure is complex, the control mode is complex and the failure is easy to occur; if the clutch adopts a jaw clutch, namely, through a mechanical control structure of attaching and detaching two clutch gears, namely a fixed clutch gear and a movable clutch gear, when the two clutch gears are needed to be combined, when two teeth of the two clutch gears are not coordinated, the combination is not smooth, and when the two clutch gears are needed to be detached, under the condition that the two clutch gears are meshed, detachment resistance exists, so that the movement positioning difference is larger, and the transfer work of a patient cannot be completed completely.

As shown in the accompanying drawings 11-12 of the patent specification, as shown in fig. 17, the clutch driving mechanism adopts multiple transmission modes such as a small rack, a small gear, a tension rod, a rocker arm, a push rod and the like, the structure and the transmission modes are complex, and the failure rate is increased.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide a shifting vehicle.

The invention adopts the following technical scheme: a shifting vehicle comprises a vehicle body with a lifting mechanism and universal casters, and a movable bed board mechanism for transversely moving and taking over patients; the moving bed plate mechanism is arranged on a frame of the vehicle body; the movable bed board mechanism comprises a cloth rolling shaft frame, a cloth rolling shaft, a terminal connector base body, an upper movable board, upper movable cloth, a lower movable board, lower movable cloth, a first sprocket assembly and a ratchet assembly;

The cloth rolling shaft frame is longitudinally arranged, and the cloth rolling shaft is arranged in the cloth rolling shaft frame;

the end connector bodies are respectively and fixedly arranged at two ends of the cloth rolling shaft frame, two ends of the cloth rolling shaft are rotatably supported in the end connector bodies through bearings, and the end parts of the cloth rolling shaft extend out of the end connector bodies respectively;

one side of the upper moving plate is hinged on the end joint seat body, and the upper moving cloth is wound around the peripheries of the upper moving plate and the cloth winding shaft;

The lower moving plate is arranged below the upper moving plate, the cloth rolling shaft frame is provided with a longitudinal opening, the lower edge of the longitudinal opening extends forwards to form a connecting tongue piece, and the lower moving plate is fixedly connected to the connecting tongue piece;

The lower moving cloth is wound on the periphery of the lower moving plate; and the lower moving cloth positioned below the receiving and delivering side of the lower moving plate is fixed on the frame of the vehicle body.

The first sprocket assembly comprises a first connecting shaft longitudinally arranged at the bottom of a frame of the vehicle body, a first outer main sprocket sleeved on the first connecting shaft, first slave sprockets arranged at the front end and the rear end of the frame, and a first transmission roller chain sleeved on the first outer main sprocket and the first slave sprocket; the end part of the cloth rolling shaft extending out of the end joint seat is fixed on the first transmission roller chain through a connecting component; the connecting component comprises a cloth rolling shaft driving chain wheel, an idler wheel and a fixing sheet; the end part of the cloth rolling shaft is inserted into the cloth rolling shaft driving sprocket and is driven to rotate by the cloth rolling shaft driving sprocket; the first transmission roller chain is wound between the cloth winding shaft transmission chain wheel and the idler pulley in an S shape; the cloth winding shaft driving sprocket and the idler wheel are arranged on a fixing piece, and the fixing piece is fixed on the end joint seat body;

The ratchet assembly comprises a ratchet, a pawl, a spring, a cam block and a ratchet motor, wherein the ratchet is sleeved on the first connecting shaft, the connecting end of the pawl is hinged to one side of the ratchet, and the clamping end of the pawl is matched with ratchet teeth of the ratchet; the spring is arranged on the outer side of the pawl; the cam block is fixed on the power output shaft of the ratchet motor and is positioned on the inner side of the pawl.

The invention relates to a shifting vehicle, wherein the ratchet wheel assembly further comprises a limit trigger and a micro switch; the two pawls are symmetrically arranged on the left side and the right side of the cam block respectively; the two limit triggers are sleeved on a power output shaft of the ratchet motor and synchronously rotate with the cam block; the two microswitches are respectively and correspondingly arranged on the outer sides of the two pawls.

The shifting vehicle disclosed by the invention is characterized in that the ratchet wheel assembly is arranged on the mounting seat through a bearing; the mounting seat comprises a first mounting sheet and a second mounting sheet vertically connected to the bottom of the first mounting sheet; a notch for the first connecting shaft to pass through is formed in the first mounting piece; the pawl is hinged on the first mounting piece; the ratchet wheel assembly further comprises a spring mounting seat for mounting a spring, wherein the spring mounting seat is mounted on the first mounting plate, one end of the spring is abutted against the spring mounting seat, and the other end of the spring is abutted against the outer side of the pawl; the micro switch is arranged on the second mounting piece.

The shift car of the invention, wherein the first sprocket assembly further comprises a first sprocket motor for driving the first connecting shaft to rotate.

The invention relates to a shifting vehicle, wherein an upper shifting plate and a lower shifting plate are driven by a shifting plate driving mechanism to synchronously move forwards or backwards transversely, and the shifting plate driving mechanism comprises a second connecting shaft longitudinally arranged at the bottom of a vehicle frame of a vehicle body, a second main chain wheel arranged in the middle of the second connecting shaft, a second power output chain wheel in transmission connection with the second main chain wheel through a second roller chain and a shifting plate motor sleeved on the second power output chain wheel; a second chain wheel assembly is arranged at both ends of the second connecting shaft; each set of second sprocket assemblies includes a second outboard master sprocket, a second slave sprocket, a second drive roller chain; the second outside main sprocket is sleeved on the second connecting shaft, the second auxiliary sprocket is respectively arranged at the front end and the rear end of the frame, a second transmission roller chain is adapted to the second outside main sprocket and the second auxiliary sprocket, and two ends of the upper moving plate and the lower moving plate are respectively and correspondingly fixed on the second transmission roller chain through end joint bases.

The invention discloses a shifting vehicle, which further comprises a micro switch for detecting the position of an end connector base body, wherein the micro switch is arranged between a first transmission roller chain and a second transmission roller chain and is positioned at one side of a movable bed plate mechanism far away from a receiving and sending side.

The invention discloses a shifting vehicle, which further comprises a micro switch for detecting the position of a guardrail, wherein the micro switch is arranged at the bottom of a vehicle frame and is positioned at the receiving and sending side of a movable bed plate mechanism.

The invention relates to a shifting vehicle, wherein a rubber tube is tightly sleeved outside a cloth rolling shaft, and upper shifting cloth is wrapped on the peripheries of an upper shifting plate and the rubber tube.

The shifting vehicle disclosed by the invention is characterized in that the edges of two longitudinal edges of a longitudinal opening of the cloth rolling shaft frame are provided with longitudinal guide roll shafts, and small rollers are arranged on the guide roll shafts.

The invention relates to a shifting vehicle, wherein the front and rear longitudinal edges of an upper moving plate and the front and rear longitudinal edges of a lower moving plate are respectively provided with a longitudinal guide roll shaft, and small rollers are arranged on the guide roll shafts.

Compared with the prior art, the invention has the beneficial effects that:

The invention has the core that the first chain wheel component and the ratchet wheel component are arranged to replace the prior transmission mode of the common cooperation of the clutch gear, the long rack, the clutch and the clutch driving mechanism, so that the transmission structure of the movable bed plate mechanism is greatly simplified, the structure of the movable bed plate mechanism is more compact, the transmission is smoother, the operation of the movable bed plate is more humanized, and the position of a patient is corrected when necessary.

In addition, the first sprocket assembly and the ratchet wheel assembly are further matched with the first sprocket motor, so that independent rotation of the upper moving cloth can be realized, the position of a patient on the shifting vehicle can be corrected when necessary, and even disposable sanitary cloth can be coated on the periphery of the upper moving cloth.

Drawings

FIG. 1 is a schematic perspective view of a shift cart (with a movable bed plate mechanism extended forward) according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of a shifting cart according to another embodiment of the present invention;

FIG. 3 is an enlarged schematic view of area A of FIG. 2;

FIG. 4 is an enlarged schematic view of region B of FIG. 2;

FIG. 5 is a top view of the connection of the moving bed frame mechanism to the bed frame;

FIG. 6 is an enlarged schematic view of region C of FIG. 5;

FIG. 7 is an enlarged schematic view of region D of FIG. 5;

FIG. 8 is a schematic view of the structure of the cloth roller and the termination header body;

FIG. 9 is a schematic view of the structure of the termination header body and the up and down moving plate;

FIG. 10 is an enlarged schematic view of area E of FIG. 9;

FIG. 11 is a bottom view of the connection of the moving bed frame mechanism to the bed frame;

FIG. 12 is a schematic view of a ratchet assembly;

FIG. 13 is a schematic diagram showing the operation of the shift cart according to the preferred embodiment of the invention;

FIG. 14 is a schematic view of the initial state shift cart of the present invention;

In the figure: 100. a movable bed board mechanism; 1. a cloth rolling shaft frame; 2. a cloth rolling shaft; 3. the end joint head seat body; 4. an upper moving plate; 5. moving the cloth upwards; 6. a lower moving plate; 7. a lower moving cloth; 8. a first sprocket assembly; 81. a first connecting shaft; 82. a first outer main sprocket; 83. a first slave sprocket; 84. a first drive roller chain; 85. a connection assembly; 851. a cloth roller driving sprocket; 852. an idler; 853. a fixing piece; 86. a first sprocket motor; 9. a ratchet assembly; 91. a ratchet wheel; 92. a pawl; 93. a spring; 94. a cam block; 95. a ratchet motor; 96. a limit trigger; 97. a micro-switch; 98. a mounting base; 981. a first mounting tab; 982. a second mounting plate; 99. a spring mounting base; 10. a connecting tongue piece; 11. a moving plate driving mechanism; 111. a second connecting shaft; 112. a second main sprocket; 113. a second power take-off sprocket; 114. a moving plate motor; 115. a second sprocket assembly; 1151. a second outer main sprocket; 1152. a second slave sprocket; 1153. a second drive roller chain; 12. a rubber tube; 13. a guide roll shaft; 14. a small roller; 15. a guide roll shaft; 200. a vehicle body; 21. a base; 22. a frame; 23. a lifting bracket; 24. universal castor; 25. brake pedal; 26. a lifting motor; 27. a telescopic rod; 28. guard bars; 300. an electronic controller; a. a transverse direction; b. in the longitudinal direction.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.

This embodiment is one of the preferred embodiments of the present invention, as shown in fig. 1-14, a displacement cart comprising a cart body 200 having a lifting mechanism and being provided with casters, a moving bed plate mechanism 100 for laterally moving and taking in a patient; the moving bed plate mechanism is arranged on a frame 22 of the vehicle body; in the embodiment, the moving direction of the patient is taken as a transverse direction by extending and retracting the movable bed board mechanism back and forth, as shown in a direction a in fig. 1; on the same horizontal plane, the directions perpendicular to each other in the transverse moving direction are taken as longitudinal directions, such as the direction b shown in fig. 1; FIG. 1 shows a moving bed plate mechanism mounted on a vehicle body and extending outwards to be in a use state in the receiving and delivering process of a moving vehicle; the movable bed board mechanism extends forwards and retracts backwards to the front.

The vehicle body 200 is composed of a base 21, a frame 22, a lifting bracket 23 connected between the base and the frame, and the like. The universal castor 24 is arranged below the base, and the brake pedal 25 is also arranged on the guide castor and the universal castor at the rear side of the vehicle body, so that an operator can conveniently brake the transfer vehicle. The lifting bracket 23 is driven by a lifting motor 26 arranged at the bottom of the frame and a telescopic rod 27 connected between the lifting motor and the lifting bracket to complete lifting action. The left and right ends of the frame are end frames, and the front and back sides of the frame are provided with turnover guardrails 28. The rear side of the frame is also led out with a wire, the tail end of the wire is connected with a hand-held controller (not shown in the figure) and an electronic controller 300, a plurality of control buttons are arranged on the hand-held controller, and a relay, a singlechip and a relay control unit are arranged in the electronic controller and are commonly used for receiving detection signals of all the motors, microswitches, electric push rods of lifting mechanisms and other hardware on the shifting vehicle and controlling the operation of the detection signals.

As shown in fig. 3-12, the movable bed board mechanism 100 comprises a cloth rolling shaft frame 1, a cloth rolling shaft 2, a terminal connector base body 3, an upper movable board 4, an upper movable cloth 5, a lower movable board 6, a lower movable cloth 7, a first sprocket assembly 8 and a ratchet wheel assembly 9;

the lower moving plate is arranged below the upper moving plate, the cloth rolling shaft frame is provided with a longitudinal opening, the lower edge of the longitudinal opening extends forwards to form a connecting tongue piece 10, and the lower moving plate is fixedly connected to the connecting tongue piece;

The first sprocket assembly 8 comprises a first connecting shaft 81 longitudinally arranged at the bottom of a frame of the vehicle body, a first outer main sprocket 82 sleeved on the first connecting shaft, first slave sprockets 83 arranged at the front end and the rear end of the frame, and a first transmission roller chain 84 sleeved on the first outer main sprocket and the first slave sprockets; the end part of the cloth rolling shaft extending out of the end joint seat body is fixed on the first transmission roller chain through a connecting component 85; the connecting component 85 comprises a cloth roller driving chain wheel 851, an idler 852 and a fixing piece 853; the end part of the cloth rolling shaft is inserted into the cloth rolling shaft driving sprocket and is driven to rotate by the cloth rolling shaft driving sprocket; the first transmission roller chain is wound between the cloth winding shaft transmission chain wheel and the idler pulley in an S shape; the cloth winding shaft driving sprocket and the idler wheel are arranged on a fixing piece, and the fixing piece is fixed on the end joint seat body;

As shown in fig. 12, the ratchet assembly 9 includes a ratchet 91, a pawl 92, a spring 93, a cam block 94, and a ratchet motor 95, the ratchet is sleeved on the first connecting shaft, the connecting end of the pawl is hinged on a mounting seat 98 on one side of the ratchet, and the holding end of the pawl is matched with the ratchet teeth of the ratchet; the spring is arranged on the outer side of the pawl; the cam block is fixed on the power output shaft of the ratchet motor and positioned at the inner side of the pawl; the ratchet wheel assembly is used for driving the first connecting shaft to rotate or stop rotating.

The shifting cart has two functions of taking in and taking out patients, namely, the patient taking in and taking out refers to the shifting cart for shifting the patient from the sickbed; patient transfer refers to transferring a patient from a cart to a patient bed; whether receiving or delivering a patient, two actions are required, one is to extend the upper and lower moving plates laterally and the other is to retract the upper and lower moving plates laterally.

As a preferred embodiment, as shown in fig. 12, the ratchet assembly further includes a limit trigger 96 and a microswitch 97; the two pawls are symmetrically arranged on the left side and the right side of the cam block respectively; the two limit triggers are sleeved on a power output shaft of the ratchet motor and synchronously rotate with the cam block; the two microswitches are respectively and correspondingly arranged on the outer sides of the two pawls. According to the actual transfer requirement of the shift vehicle, a limit trigger and a micro switch are arranged, so that the ratchet wheel assembly can timely control the first connecting shaft to rotate or stop rotating, namely, the cam block rotates under the drive of the ratchet motor, and the limit trigger synchronously rotating with the cam block touches or is far away from the micro switch, so that the pawl is clamped into or released from the ratchet wheel; when the pawl is clamped into the ratchet wheel, the first connecting shaft stops rotating, and when the pawl is unclamped from the ratchet wheel, the first connecting shaft rotates.

In this embodiment, as shown in FIG. 12, the ratchet assembly is mounted on a mount 98 by bearings; the mounting seat comprises a first mounting plate 981 and a second mounting plate 982 vertically connected to the bottom of the first mounting plate; a notch for the first connecting shaft to pass through is formed in the first mounting piece; the pawl is hinged on the first mounting piece; the ratchet assembly further comprises a spring mounting seat 99 for mounting a spring, wherein the spring mounting seat is mounted on the first mounting plate, one end of the spring is abutted against the spring mounting seat, and the other end of the spring is abutted against the outer side of the pawl; the micro switch is arranged on the second mounting piece.

As further preferred, the first sprocket assembly further includes a first sprocket motor 86 for driving the first connecting shaft in rotation, as shown in fig. 11. The first sprocket motor is designed to pull the patient toward the middle of the shift cart without being biased to one side when the patient is transferred to the shift cart.

In this embodiment, the upper moving plate and the lower moving plate are driven by a moving plate driving mechanism 11 to move transversely forwards or backwards synchronously, the moving plate driving mechanism comprises a second connecting shaft 111 longitudinally arranged at the bottom of a frame of the vehicle body, a second main chain wheel 112 arranged in the middle of the second connecting shaft, a second power output chain wheel 113 in transmission connection with the second main chain wheel through a second roller chain (not shown), and a moving plate motor 114 sleeved on the second power output chain wheel; a second sprocket assembly 115 is mounted to both ends of the second connecting shaft; each set of second sprocket assemblies includes a second outer main sprocket 1151, a second secondary sprocket 1152, a second drive roller chain 1153; the second outside main sprocket is sleeved on the second connecting shaft, the second auxiliary sprocket is respectively arranged at the front end and the rear end of the frame, a second transmission roller chain is adapted to the second outside main sprocket and the second auxiliary sprocket, and two ends of the upper moving plate and the lower moving plate are respectively and correspondingly fixed on the second transmission roller chain through end joint bases.

As a further preferred aspect, the shift cart of the present invention further includes a micro switch 97 for detecting the position of the terminal connector body, the micro switch being disposed between the first transmission roller chain and the second transmission roller chain and being located at a side of the moving bed plate mechanism away from the receiving side. Before the movable bed board mechanism is transversely retracted to the original state from the use state, the end connector base body moves to one side of the bed frame far away from the receiving side and touches the micro switch, so that the movable bed board mechanism is transversely retracted to the original state without continuous movement, and the movable board motor is controlled to stop operating.

As a further preferred aspect, the displacement cart of the present invention further includes a micro switch 97 for detecting the position of the guardrail, the micro switch being disposed at the bottom of the cart frame and located at the pick-up side of the moving bed plate mechanism.

As a further preferable scheme, the fixing piece comprises a front piece and a rear piece, and the cloth rolling shaft driving sprocket and the idler wheel are arranged between the front piece and the rear piece; the rear piece is fixed on the terminal head seat body.

As a further preferable scheme, a rubber tube 12 is tightly sleeved outside the cloth rolling shaft, and the upper moving cloth is wrapped on the periphery of the upper moving plate and the rubber tube.

The shifting vehicle of the invention, wherein, the two longitudinal edges of the longitudinal opening of the cloth rolling shaft frame are provided with longitudinal guiding roll shafts 13, and the guiding roll shafts are provided with small rollers 14, as shown in fig. 10. The design of the guide roll shaft and the small roller can reduce the resistance of the cloth rolling shaft frame under the condition of relative movement on the bedstead, so that the transverse movement of the whole flat movable bed board is smoother.

In the displacement cart of the present invention, the front and rear longitudinal edges of the upper moving plate and the front and rear longitudinal edges of the lower moving plate are respectively provided with a longitudinal guiding roll shaft 15, and small rollers 14 are mounted on the guiding roll shafts, as shown in fig. 7. The design of the guide roll shaft and the small roller can reduce the resistance under the condition that the movable cloth and the movable plate do relative movement, so that the transverse movement of the whole flat movable bed plate is smoother.

The working process of the shift vehicle in the preferred embodiment of the invention comprises the following steps:

as shown in fig. 13-14, the initial state of the shifting cart before receiving a patient is that the shifting bed board mechanism is stopped on the frame of the cart body, and the right side of the shifting cart is an operating bed or a sickbed;

(1) The process of extending the upper and lower moving plates when receiving a patient: starting the ratchet wheel assembly through the handheld controller, so that the pawl is clamped with the ratchet wheel, namely, the pawl is in a meshed state with the ratchet wheel, the first connecting shaft stops rotating, and the first outer main chain wheel does not rotate; then, the movable plate motor of the movable plate driving mechanism is started to rotate in the forward direction through the handheld controller, and the movable plate motor sequentially passes through the second power output chain wheel, the second main chain wheel, the second connecting shaft, the second outside main chain wheel, the second auxiliary chain wheel and the second transmission roller chain belt to drive the end joint seat body to move forward, the end joint seat body drives the whole movable bed plate mechanism to move forward, meanwhile, the connecting assembly fixedly connected with the end joint seat body moves forward simultaneously, the first auxiliary chain wheel on the first chain wheel assembly, the cloth winding shaft driving chain wheel and the idler wheel synchronously rotate, at the moment, the cloth winding shaft drives the cloth winding shaft to synchronously rotate, and the moving speed of the side, which is in contact with the patient body, of the upper moving cloth is exactly the same as the moving speed of the upper moving plate but opposite to the moving direction of the upper moving plate, so that the contact part of the upper moving cloth and the patient body is kept relatively static in reality. At the same time, the lower moving plate moves forward, and the lower moving cloth moves forward under the driving of the lower moving plate, but since the lower moving cloth is fixed on the panel 11 of the frame 2 (the fixing mode of the lower moving cloth can refer to the "cloth pressing device 27" disclosed in the patent number 200610052776.3, and the fixing device is not limited to various structures and modes capable of realizing fixing in the prior art), the "X" in fig. 13-14 is denoted as the "cloth pressing device 27", and therefore, the surface of the lower moving cloth, which is contacted with the bed surface of the sickbed, is always kept relatively stationary with the bed surface. In this process, the contact surface between the upper moving cloth and the lower moving cloth is kept relatively still. Thus, the motor of the movable plate can be stopped by the handheld controller, so that the movable bed plate mechanism stops moving forwards.

(2) And (3) the process of retracting the upper and lower moving plates when the patient is received: after the upper moving plate loads a patient, a moving plate motor of a moving plate driving mechanism is started by a handheld controller to rotate in the reverse direction, and the moving plate motor sequentially passes through a second power output chain wheel, a second main chain wheel, a second connecting shaft, a second outer main chain wheel, a second auxiliary chain wheel and a second transmission roller chain to drive an end joint seat body to move backwards, and the end joint seat body drives the whole moving bed plate mechanism to move backwards; the ratchet wheel assembly is started through the handheld controller, so that the pawl and the ratchet wheel are separated, namely, the pawl and the ratchet wheel are in a non-meshing state, the first sprocket motor drives the first connecting shaft to rotate, the first outer main sprocket wheel rotates, the first auxiliary sprocket wheel and the first transmission roller chain rotate in sequence, at the moment, the cloth rolling shaft on the first sprocket wheel assembly does not rotate to drive the sprocket wheel, the cloth rolling shaft does not rotate, and the upper moving cloth on the cloth rolling shaft does not rotate, so that the upper moving cloth still keeps relative static relative to a patient body, and meanwhile, the upper moving cloth still relatively static relative to the upper moving plate. The lower moving cloth is recovered under the action of the lower moving plate, so that the contact surface of the upper moving cloth and the lower moving cloth relatively moves, but the surface of the lower moving cloth, which is in contact with the surface of the sickbed, still keeps relatively static with the surface. Eventually, the patient is completely transferred to the cart. And can be after the movable plate is retrieved and is accomplished, the patient position is adjusted alone in order to guarantee that the side guardrail of delivering is normally closed.

(3) The process of extending the upper and lower moving plates when delivering the patient: the patient is transferred to the shifting vehicle, namely the upper shifting plate still loads the patient, and the moving bed driving mechanism drives the upper shifting plate and the lower shifting plate to transversely extend forwards; at the moment, the pawl of the ratchet wheel assembly and the ratchet wheel are in a non-meshing state, the first sprocket motor drives the first connecting shaft to rotate, the first outer main sprocket rotates, the first auxiliary sprocket and the first transmission roller chain rotate in sequence, at the moment, the cloth winding shaft on the first sprocket assembly does not drive the sprocket to rotate, the cloth winding shaft does not rotate, and the upper moving cloth on the cloth winding shaft does not rotate; at this time, the upper moving cloth, the upper moving plate, the lower moving plate and the patient are all relatively static, the lower moving cloth moves relatively to the lower moving plate and the upper moving cloth, but the part of the lower moving cloth contacted with the sickbed/operating table is still relatively static with the sickbed/operating table;

(4) The process of retracting the upper and lower moving plates when the patient is sent: starting the ratchet wheel assembly through the handheld controller, so that the pawl is clamped with the ratchet wheel, namely, the pawl is in a meshed state with the ratchet wheel, the first connecting shaft stops rotating, and the first outer main chain wheel does not rotate; then, the movable plate motor of the movable plate driving mechanism is started to rotate in the reverse direction through the handheld controller, the movable plate motor sequentially passes through the second power output chain wheel, the second main chain wheel, the second connecting shaft, the second outside main chain wheel, the second auxiliary chain wheel and the second transmission roller chain belt to drive the end joint seat body to move backwards, the end joint seat body drives the whole movable bed plate mechanism to move backwards, meanwhile, the connecting assembly fixedly connected with the end joint seat body moves backwards at the same time, the first auxiliary chain wheel on the first chain wheel assembly, the cloth winding shaft driving chain wheel and the idler pulley are synchronously rotated, at the moment, the cloth winding shaft driving chain wheel drives the cloth winding shaft to synchronously rotate, and the moving speed of the side of the upper moving cloth, which is contacted with the body of the patient, is exactly the same as the moving speed of the upper moving plate forwards but in the opposite direction, so that the upper moving cloth is kept relatively static with the body of the patient in fact. The upper moving cloth and patient contacting portion remains substantially stationary relative to the patient's body; the lower moving cloth moves relative to the lower moving plate, the contact part between the lower moving cloth and the sickbed/operating bed and the bed surface are kept relatively static, and the joint surface between the upper moving cloth and the lower moving cloth is also kept relatively static, so that in the whole moving process of the upper moving plate and the lower moving plate, no other relative movement exists except the relative movement exists between the moving cloth and the corresponding moving plate, and one-time transfer is completed.

The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.

Claims

1. A shifting vehicle comprises a vehicle body with a lifting mechanism and universal casters, and a movable bed board mechanism for transversely moving and taking over patients; the moving bed plate mechanism is arranged on a frame of the vehicle body; the movable bed board mechanism is characterized by comprising a cloth rolling shaft frame, a cloth rolling shaft, a terminal head seat body, an upper moving board, upper moving cloth, a lower moving board, lower moving cloth, a first sprocket assembly and a ratchet wheel assembly;

The cloth rolling shaft frame is provided with a longitudinal opening, a connecting tongue piece extends forwards from the lower edge of the longitudinal opening, and the lower moving plate is fixedly connected to the connecting tongue piece;

The lower moving cloth is wound on the periphery of the lower moving plate, and the lower moving cloth positioned below the receiving and delivering side of the lower moving plate is fixed on the frame of the vehicle body;

2. The displacement cart of claim 1, wherein the ratchet assembly further comprises a limit trigger and a micro switch; the two pawls are symmetrically arranged on the left side and the right side of the cam block respectively; the two limit triggers are sleeved on a power output shaft of the ratchet motor and synchronously rotate with the cam block; the two microswitches are respectively and correspondingly arranged on the outer sides of the two pawls.

3. The displacement cart of claim 2, wherein the ratchet assembly is mounted on the mounting base by bearings; the mounting seat comprises a first mounting sheet and a second mounting sheet vertically connected to the bottom of the first mounting sheet; a notch for the first connecting shaft to pass through is formed in the first mounting piece; the pawl is hinged on the first mounting piece; the ratchet wheel assembly further comprises a spring mounting seat for mounting a spring, wherein the spring mounting seat is mounted on the first mounting plate, one end of the spring is abutted against the spring mounting seat, and the other end of the spring is abutted against the outer side of the pawl; the micro switch is arranged on the second mounting piece.

4. The shift cart of claim 1, wherein the first sprocket assembly further comprises a first sprocket motor for driving rotation of the first connecting shaft.

5. The shift cart of claim 1, wherein the upper and lower moving plates are driven by a moving plate driving mechanism to synchronously move forward or backward and transversely, the moving plate driving mechanism comprises a second connecting shaft longitudinally arranged at the bottom of a cart frame of the cart body, a second main chain wheel arranged at the middle part of the second connecting shaft, a second power output chain wheel in transmission connection with the second main chain wheel through a second roller chain, and a moving plate motor sleeved on the second power output chain wheel; a second chain wheel assembly is arranged at both ends of the second connecting shaft; each set of second sprocket assemblies includes a second outboard master sprocket, a second slave sprocket, a second drive roller chain; the second outside main sprocket is sleeved on the second connecting shaft, the second auxiliary sprocket is respectively arranged at the front end and the rear end of the frame, a second transmission roller chain is adapted to the second outside main sprocket and the second auxiliary sprocket, and two ends of the upper moving plate and the lower moving plate are respectively and correspondingly fixed on the second transmission roller chain through end joint bases.

6. The shift cart of claim 5, further comprising a microswitch for detecting the position of the termination header body, the microswitch being disposed between the first drive roller chain and the second drive roller chain and on a side of the moving bed plate mechanism remote from the pick-up side.

7. The displacement cart of claim 1, further comprising a microswitch for detecting the position of the guard rail, the microswitch being disposed at the bottom of the frame and on the pick-up side of the moving bed mechanism.

8. The shift cart of any one of claims 1-7, wherein a rubber tube is tightly sleeved outside the cloth roller, and the upper moving cloth is wrapped around the upper moving plate and the rubber tube.

9. The shift cart of any one of claims 1-7, wherein longitudinal guide rollers are mounted to both longitudinal edges of the longitudinal opening of the cloth roller frame, and small rollers are mounted to the guide rollers.

10. The shift cart of any one of claims 1-7, wherein the front and rear longitudinal edges of the upper moving plate and the front and rear longitudinal edges of the lower moving plate are provided with longitudinal guide rollers on which small rollers are mounted.