CN211658540U - Ratchet mechanism applied to shifting vehicle and shifting vehicle - Google Patents

Abstract

The utility model discloses a ratchet mechanism applied to a shift vehicle and the shift vehicle, wherein the ratchet mechanism comprises a ratchet wheel, a pawl, a spring, a cam block, a ratchet motor, a limit trigger and a microswitch, and the ratchet wheel is sleeved on a first connecting rod shaft of the shift vehicle; the two pawls are respectively and symmetrically arranged at the left side and the right side of the cam block; the connecting end of the pawl is hinged to the periphery of the ratchet wheel, and the clamping end of the pawl is matched with the ratchet wheel teeth of the ratchet wheel; the spring is arranged on the outer side of the pawl; the cam block is fixed on a power output shaft of the ratchet motor and is positioned on the inner side of the pawl; the two limiting 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 at the outer sides of the two pawls. The core of the utility model lies in that the braking structure of the moving cloth is greatly simplified by arranging the ratchet mechanism, so that the structure of the shifting vehicle is more compact and the transmission is more smooth.

Description

Ratchet mechanism applied to shifting vehicle and shifting vehicle

Technical Field

The utility model relates to a transport means technique for loading and unloading patients, in particular to a medical patient shift vehicle which is suitable for hospitals to carry patients after operations or patients who are easy to be damaged again in the carrying process.

Background

At present, a medical shift trolley is used for moving and transferring patients with inconvenient actions before and after a surgery, the patients are moved to the shift trolley from a sickbed, and then the patients are moved to an operating table or equipment needing examination/treatment by the shift trolley, or the patients are reversely transferred. Especially for patients with wounds or patients after severe spine, cervical vertebra and thoracic vertebra operations, the birth of the medical shift cart reduces the labor intensity of medical staff, avoids secondary injuries possibly caused by moving the patient for a plurality of times during the transferring period before and after the operation, and if the wound or the focus is possibly moved, the medical shift cart not only causes great pain to the patient, but also is not beneficial to the healing of the wound after the operation.

The medical shift trolley sold or used in the market at present mainly comprises two parts, wherein one part is a trolley body used for moving, and the other part is a moving bed plate mechanism used for transversely moving to receive and send patients; for example, the "medical patient transfer cart" disclosed in chinese patent 200610052776.3, the moving bed plate mechanism adopts a double-layer combination structure of an upper moving bed/upper moving cloth and a lower moving bed/lower moving cloth, and specifically includes a cloth winding shaft frame, a cloth winding shaft, an end joint seat body, a clutch gear, an upper moving bed/upper moving cloth, a lower moving bed/lower moving cloth, and the like. However, the medical transfer bed has the following defects:

the mode of realizing the autorotation or stopping the autorotation of the cloth roller adopts the joint matching of a clutch gear, a long rack, a clutch and a clutch driving mechanism, as shown in the attached figures 16-17 of the patent specification, the defects of complex design structure, complex control mode and easy failure are caused; the transmission mode that an original clutch gear, a long rack, a clutch and a clutch driving mechanism are matched together is replaced by a first chain wheel assembly, the first chain wheel assembly comprises a first connecting rod shaft longitudinally arranged at the bottom of a frame of a vehicle body, a first outer side main chain wheel sleeved on the first connecting rod shaft, first driven chain wheels arranged at the front end and the rear end of the frame and a first transmission roller chain sleeved on the first outer side main chain wheel and the first driven chain wheel; the rotation or the stop of the rotation of the first connecting rod shaft is controlled to control the stop of the rotation or the rotation of the upper moving cloth (or the cloth rolling shaft) on the moving bed plate mechanism, so that the problem that the braking structure of the moving cloth is complex is fundamentally solved.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide an use ratchet mechanism on the aversion car and contain this ratchet mechanism's aversion car.

The utility model discloses an one of the purpose adopts following technical scheme to realize: a ratchet mechanism applied to a shifting vehicle, the shifting vehicle comprises a vehicle body with a lifting mechanism and universal castors, and a moving bed plate mechanism used for transversely moving to receive and deliver patients; the moving bed plate mechanism is arranged on a frame of the vehicle body; the moving bed plate mechanism is provided with a first connecting rod shaft, and the first connecting rod shaft rotates or stops rotating to control the upper moving cloth on the moving bed plate mechanism to stop rotating or rotating; the ratchet mechanism is used for controlling the rotation or stopping the rotation of the first connecting rod shaft on the transfer trolley; the ratchet mechanism comprises a ratchet wheel, a pawl, a spring, a cam block, a ratchet wheel motor, a limiting trigger and a microswitch, and the ratchet wheel is sleeved on a first connecting rod shaft of the displacement vehicle; the two pawls are respectively and symmetrically arranged at the left side and the right side of the cam block; one end of each pawl is a connecting end, the other end of each pawl is a clamping end, the connecting ends of the pawls are hinged to the periphery of the ratchet wheel, and the clamping ends of the pawls are matched with ratchet wheel teeth of the ratchet wheel to lock and release the ratchet wheel; the spring is arranged on the outer side of the pawl; the cam block is fixed on a power output shaft of the ratchet motor and is positioned on the inner side of the pawl; the two limiting 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.

Use ratchet on aversion car, wherein, ratchet still includes the mount pad, this mount pad passes through the bearing and installs on first connecting rod axle.

The utility model discloses an use ratchet mechanism on aversion car, wherein, the mount pad includes first installation piece and the perpendicular second installation piece that connects in first installation piece bottom; the first mounting piece is provided with a notch, the first connecting rod shaft penetrates through the notch, and the ratchet wheel is fixed on the first connecting rod shaft; the pawl is hinged to one side of the first mounting piece, the ratchet motor is fixed to the other side of the first mounting piece, and a power output shaft of the ratchet extends out of the notch and is located on the inner side of the pawl; the micro switch is installed on the second installation sheet.

Use ratchet on aversion car, wherein, this ratchet still includes the spring mount pad that is used for installing the spring, and the spring mount pad is installed on first mount pad, spring one end butt is on the spring mount pad, and other end butt is in the pawl outside.

Use ratchet on aversion car, wherein, micro-gap switch installs on the second mounting plate through L type mounting plate respectively.

The second purpose of the utility model is realized by adopting the following technical scheme: a shifting trolley comprises the ratchet mechanism.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the core of the utility model lies in that the ratchet mechanism is arranged, the transmission mode of common cooperation of the original clutch gear, the long rack, the clutch and the clutch driving mechanism is replaced by the cooperation of the ratchet mechanism and the chain wheel component, the brake structure of the moving cloth is greatly simplified, the structure of the shift trolley is more compact, the transmission is smoother, the operation of the transfer trolley is more humanized, and the position of a patient is corrected when necessary; particularly, the position relation between the limiting trigger and the microswitch and the cam block is designed according to the two forward or backward moving states of the moving bed plate mechanism, and the two moving states of the moving bed plate mechanism are controlled through two contacts by utilizing the linkage action of the cam block and the limiting trigger, so that the transmission effect of the moving bed plate mechanism is further ensured.

Drawings

Fig. 1 is a schematic perspective view of a ratchet mechanism applied to a shift cart according to a preferred embodiment of the present invention;

FIG. 2 is a schematic view of another angle structure of the ratchet mechanism applied to the shift cart according to the preferred embodiment of the present invention;

fig. 3 is a schematic perspective view of the shift cart according to the preferred embodiment of the present invention (the moving bed plate mechanism is extended forward);

FIG. 4 is a partial perspective view of the vehicle according to another preferred embodiment of the present invention;

FIG. 5 is an enlarged view of area A of FIG. 4;

FIG. 6 is an enlarged view of area B of FIG. 4;

FIG. 7 is a top view of the connection structure of the moving bed plate mechanism to the bed frame;

FIG. 8 is an enlarged view of area C of FIG. 7;

FIG. 9 is an enlarged view of area D of FIG. 7;

FIG. 10 is a schematic view of the cloth beam and the end fitting housing;

FIG. 11 is a schematic structural view of the end fitting housing and the up-down moving plate;

FIG. 12 is an enlarged view of area E of FIG. 11;

FIG. 13 is a bottom view of the coupling structure of the moving bed plate mechanism to the bed frame;

fig. 14 is a schematic view of the working process of the medical shift cart according to the preferred embodiment of the present invention;

fig. 15 is a schematic structural view of the medical shift cart in the initial state of the present invention;

in the figure: 100. a moving bed plate mechanism; 1. a cloth rolling shaft frame; 2. a cloth rolling shaft; 3. an end fitting housing; 4. moving the plate upwards; 5. moving the cloth upwards; 6. a lower moving plate; 7. lower moving cloth; 8. a first sprocket assembly; 81. a first link shaft; 82. a first outboard main sprocket; 83. a first slave sprocket; 84. a first drive roller chain; 85. A connecting assembly; 851. a cloth roller transmission chain wheel; 852. an idler pulley; 853. a fixing sheet; 86. a first sprocket motor; 9. a ratchet mechanism; 91. a ratchet wheel; 92. a pawl; 93. a spring; 94. a cam block; 95. a ratchet motor; 96. a limiting trigger; 97. a microswitch; 98. a bearing; 99. a mounting seat; 991. a first mounting piece; 992. a second mounting piece; 910. a spring mount; 911. an L-shaped mounting tab; 10. a connection tongue; 11. a moving plate driving mechanism; 111. a second link 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 outboard main sprocket; 1152. A second slave sprocket; 1153. a second drive roller chain; 200. a vehicle body; 21. a base; 22. a frame; 23. a lifting support; 24. a universal caster; 25. braking and pedaling; 26. a lifting motor; 27. a telescopic rod; 28. A guardrail; 300. an electronic controller; a. a transverse direction; b. a longitudinal direction.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.

The ratchet mechanism of this embodiment is one of the preferred embodiments of the present invention, as shown in fig. 1-2, the ratchet mechanism 9 includes a ratchet 91, a pawl 92, a spring 93, a cam block 94, a ratchet motor 95, a limit trigger 96 and a microswitch 97, and the ratchet is sleeved on the first connecting rod shaft 81 of the shift cart; the two pawls are respectively and symmetrically arranged at the left side and the right side of the cam block; one end of each pawl is a connecting end, the other end of each pawl is a clamping end, the connecting ends of the pawls are hinged to the periphery of the ratchet wheel, and the clamping ends of the pawls are matched with ratchet wheel teeth of the ratchet wheel to lock and release the ratchet wheel; the spring is arranged on the outer side of the pawl; the cam block is fixed on a power output shaft of the ratchet motor and is positioned on the inner side of the pawl; the two limiting 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 shifting vehicle, a limit trigger and a microswitch are arranged, so that the ratchet mechanism can timely control the first connecting rod shaft to rotate or stop rotating, namely, the cam block rotates under the driving of a ratchet motor, and the limit trigger rotating synchronously with the cam block is made to touch or be far away from the microswitch, so that a pawl is clamped into or loosened from a ratchet; when the pawl is clamped into the ratchet wheel, the first connecting rod shaft stops rotating, and when the pawl releases the ratchet wheel, the first connecting rod shaft rotates.

The core of the application lies in that the ratchet mechanism is arranged, and the original transmission mode that the clutch gear, the long rack, the clutch and the clutch driving mechanism are matched together is replaced by the matching of the ratchet mechanism and the chain wheel assembly, so that the brake structure of the moving cloth of the moving bed plate mechanism is greatly simplified, and the structure of the shifting vehicle is more compact and the transmission is smoother; particularly, the position relation between the limiting trigger and the microswitch and the cam block is designed according to the two forward or backward moving states of the moving bed plate mechanism, and the two moving states of the moving bed plate mechanism are controlled through two contacts by utilizing the linkage action of the cam block and the limiting trigger, so that the transmission effect of the moving bed plate mechanism is further ensured.

As a further preferred option, the ratchet mechanism further comprises a mounting block 99, which is mounted on the first link shaft by means of a bearing 98.

As a further preferable scheme, the mounting seat 99 comprises a first mounting piece 991 and a second mounting piece 992 vertically connected to the bottom of the first mounting piece; the first mounting piece is provided with a notch, the first connecting rod shaft penetrates through the notch, and the ratchet wheel is fixed on the first connecting rod shaft; the pawl is hinged to one side of the first mounting piece, the ratchet motor is fixed to the other side of the first mounting piece, and a power output shaft of the ratchet extends out of the notch and is located on the inner side of the pawl; the micro switch is installed on the second installation sheet.

As a further preferable scheme, the ratchet mechanism further comprises a spring mounting seat 910 for mounting a spring, the spring mounting seat is mounted on the first mounting plate, one end of the spring abuts against the spring mounting seat, and the other end abuts against the outer side of the pawl.

More preferably, the micro switches are mounted on the second mounting pieces by means of L-shaped mounting pieces 911, respectively.

The actual operation of the ratchet mechanism will be explained in detail below by taking the shift cart as an example.

As shown in fig. 3-15 and fig. 1-2, a medical cart for moving comprises a cart body 200 with a lifting mechanism and equipped with universal casters, a moving bed plate mechanism 100 for laterally moving a patient; the moving bed plate mechanism is arranged on a frame 22 of the vehicle body; in this embodiment, the moving direction of the patient to be transported is the transverse direction, which is the direction a shown in fig. 3, by extending and retracting the moving bed plate mechanism back and forth; on the same horizontal plane, the direction perpendicular to the transverse moving direction is taken as the longitudinal direction, such as the direction b shown in fig. 3; FIG. 3 is a state that the moving bed plate mechanism is installed on the cart body and extends outwards, and is used in the receiving and delivering process of the medical shift cart; the moving bed plate mechanism extends forwards to be the front, and the moving bed plate mechanism retracts backwards to be the rear.

The vehicle body 200 includes a base 21, a frame 22, and a lifting bracket 23 connected between the base and the frame. The universal caster 24 is arranged below the base, and the brake pedal 25 is arranged on the guide caster and the universal caster 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 mounted at the bottom of the frame and a telescopic rod 27 connected between the lifting motor and the lifting bracket to complete the lifting action. The left and right ends of the frame are end frames, and the front and rear sides of the frame are provided with turnover guardrails 28. The rear side of the frame is also led with a lead, the tail end of the lead is connected with a handheld controller (not shown in the figure) and an electronic controller 300, the handheld controller is provided with a plurality of control buttons, and the electronic controller is internally provided with a relay, a single chip microcomputer and a relay control unit which are used for receiving detection signals of all the hardware such as motors, microswitches and electric push rods of lifting mechanisms on the shift car and controlling the operation of the hardware.

As shown in fig. 5 to 14, the moving bed plate mechanism 100 includes a cloth winding shaft frame 1, a cloth winding shaft 2, an end joint base body 3, an upper moving plate 4, an upper moving plate 5, a lower moving plate 6, a lower moving plate 7, a first sprocket assembly 8, and a ratchet mechanism 9;

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

the end joint seat 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 joint seat bodies through bearings, and the end parts of the cloth rolling shaft respectively extend out of the end joint seat bodies;

one side of the upper moving plate is hinged on the end joint base body, and the upper moving cloth is wound on the peripheries of the upper moving plate and the cloth rolling 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 10, 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 chain wheel assembly 8 comprises a first connecting rod shaft 81 longitudinally arranged at the bottom of the frame of the vehicle body, a first outer side main chain wheel 82 sleeved on the first connecting rod shaft, first driven chain wheels 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 side main chain wheel and the first driven chain wheels; the end of the cloth beam 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 rolling shaft transmission chain wheel 851, an idler wheel 852 and a fixing plate 853; the end part of the cloth rolling shaft is inserted into the cloth rolling shaft transmission chain wheel and is driven by the cloth rolling shaft transmission chain wheel to rotate; the first transmission roller chain is wound between the cloth rolling shaft transmission chain wheel and the idler wheel in an S shape; the cloth rolling shaft transmission chain wheel and the idler wheel are arranged on a fixing sheet, and the fixing sheet is fixed on the end joint base body;

the structure of the ratchet mechanism is described with reference to the corresponding description above and to figures 1-2.

In addition, the first chain wheel component and the ratchet wheel component are further matched with the first chain wheel motor, so that the upper moving cloth can rotate independently, the position of a patient on the moving vehicle can be corrected when necessary, and even the periphery of the upper moving cloth can be coated with the disposable sanitary cloth.

The patient receiving and sending functions of the shift trolley are two, namely the patient receiving function and the patient sending function, and the patient receiving refers to the fact that the patient is transferred into the medical shift trolley from a sickbed; the step of sending the patient refers to transferring the patient from the medical shift cart to a sickbed; whether the patient is received or sent, the patient needs to go through two actions, namely transversely extending the upper moving plate and the lower moving plate and transversely retracting the upper moving plate and the lower moving plate.

As a further preferred solution, as shown in fig. 13, the first chain wheel assembly further comprises a first chain wheel motor 86 for driving the first link shaft to rotate. The first chain wheel motor is designed to pull the patient to the middle part of the medical shift trolley without deviating to one side after the patient is transferred to the shift trolley.

In this embodiment, the upper moving plate and the lower moving plate are driven by a moving plate driving mechanism 11 to synchronously move forwards or backwards and transversely, and the moving plate driving mechanism includes a second connecting rod shaft 111 longitudinally arranged at the bottom of the vehicle frame of the vehicle body, a second main chain wheel 112 arranged in the middle of the second connecting rod 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; the two ends of the second connecting shaft are both provided with a second chain wheel assembly 115; each set of second sprocket assemblies includes a second outboard master sprocket 1151, a second slave sprocket 1152, a second drive roller chain 1153; the second outside main chain wheel is sleeved on the second connecting shaft, the second driven chain wheel is respectively installed at the front end and the rear end of the frame, second transmission roller chains are matched on the second outside main chain wheel and the second driven chain wheel, and two ends of the upper moving plate and the lower moving plate are respectively and correspondingly fixed on the second transmission roller chains through end connector base bodies.

The utility model discloses the working process of medical aversion car of preferred embodiment:

as shown in fig. 14-15, the initial state of the medical shift cart before patient delivery is that the moving bed plate mechanism is parked on the frame of the cart body, and the right side of the medical shift cart is an operating bed or a hospital bed;

(1) the process that the upper and lower moving plates extend out when a patient is connected is as follows: the ratchet mechanism is started through the handheld controller, so that the pawl clamps the ratchet wheel, namely the pawl and the ratchet wheel are in a meshed state, the first connecting rod shaft stops rotating, and the first outer side main chain wheel does not rotate; then, a moving plate motor of the moving plate driving mechanism is started to rotate in the forward direction through a handheld controller, the moving plate motor drives an end connector base body to move forward through a second power output chain wheel, a second main chain wheel, a second connecting rod shaft, a second outer side main chain wheel, a second driven chain wheel and a second transmission roller chain in sequence, the end connector base body drives the whole moving plate mechanism to move forward, meanwhile, the connecting component fixedly connected with the end connector base body moves forwards simultaneously, the first driven chain wheel, the cloth rolling shaft transmission chain wheel and the idler wheel on the first chain wheel component passively and synchronously rotate, at the moment, the cloth rolling shaft transmission chain wheel drives the cloth rolling shaft to synchronously rotate, the cloth rolling shaft drives the upper moving cloth to rotate, and the moving speed of the surface, in contact with the body of the patient, of the upper moving cloth is just the same as the moving speed of the upper moving plate moving forwards but opposite in direction, so that the part, in contact with the patient, of the upper moving cloth is kept relatively still with the body of the patient actually. Meanwhile, the lower moving plate moves forward, and the lower moving cloth moves forward by 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 strip device 27" disclosed in patent No. 200610052776.3, although the fixing device is not limited to various structures and modes capable of realizing fixing in the prior art), the "X" in fig. 14-15 is represented as "cloth pressing strip device 27", and thus the surface contacting with the bed surface of the hospital bed is always kept relatively static with the bed surface. In addition, in the process, the contact surfaces of the upper moving cloth and the lower moving cloth are kept still relatively. At this point, the moving plate motor can be stopped through the handheld controller, so that the moving plate mechanism stops moving forwards.

(2) The process of retracting the upper and lower movable plates after receiving the patient: after the patient is loaded on the upper moving plate, a moving plate motor of the moving plate driving mechanism is started to rotate reversely through the handheld controller, the moving plate motor drives the end connector base to move backwards through a second power output chain wheel, a second main chain wheel, a second connecting rod shaft, a second outer side main chain wheel, a second driven chain wheel and a second transmission roller chain in sequence, and the end connector base drives the whole moving plate mechanism to move backwards; the ratchet mechanism is started through the hand-held controller, so that the pawl is separated from the ratchet wheel, namely the pawl and the ratchet wheel are in a non-meshed state, the first chain wheel motor drives the first connecting rod shaft to rotate, the first outer side main chain wheel rotates, the first driven chain wheel and the first transmission roller chain rotate in sequence, at the moment, the cloth winding shaft transmission chain wheel on the first chain wheel assembly does not rotate, the cloth winding shaft does not rotate, the upper moving cloth on the cloth winding shaft does not rotate, and therefore the upper moving cloth still keeps relative rest relative to the body of a patient and simultaneously relative to the upper moving plate. The lower moving cloth is recovered under the action of the lower moving plate, so that the contact surfaces of the upper moving cloth and the lower moving cloth move relatively, but the surface of the lower moving cloth, which is in contact with the sickbed surface, is still kept relatively still with the sickbed surface. Eventually, the patient is completely transferred to the cart.

(3) The process of extending the upper and lower movable plates when a patient is sent out is as follows: the patient is transferred to the medical shift trolley, namely the upper moving plate still loads the patient, and the moving bed driving mechanism drives the upper and lower moving plates to move forwards and transversely extend; at the moment, a pawl of the ratchet mechanism and the ratchet wheel are in a non-meshed state, the first chain wheel motor drives the first connecting rod shaft to rotate, the first outer side main chain wheel rotates, the first driven chain wheel and the first transmission roller chain rotate in sequence, at the moment, the cloth rolling shaft transmission chain wheel on the first chain wheel assembly does not rotate, the cloth rolling shaft does not rotate, and the upper moving cloth on the cloth rolling shaft does not rotate; at the moment, the upper moving cloth, the upper moving plate, the lower moving plate and the patient are all relatively static, the lower moving cloth relatively moves relative to the lower moving plate and the upper moving cloth, but the part of the lower moving cloth, which is in contact with the sickbed/operating bed, is still relatively static with the sickbed/operating bed;

(4) when a patient is sent, the process of retracting the upper and lower moving plates is as follows: the ratchet mechanism is started through the handheld controller, so that the pawl clamps the ratchet wheel, namely the pawl and the ratchet wheel are in a meshed state, the first connecting rod shaft stops rotating, and the first outer side main chain wheel does not rotate; then, a moving plate motor of the moving plate driving mechanism is started to rotate reversely through the handheld controller, the moving plate motor drives an end connector base to move backwards through a second power output chain wheel, a second main chain wheel, a second connecting rod shaft, a second outer side main chain wheel, a second driven chain wheel and a second transmission roller chain in sequence, the end connector base drives the whole moving plate mechanism to move backwards, meanwhile, the connecting component fixedly connected with the end connector base body moves backwards at the same time, the first driven chain wheel, the cloth rolling shaft transmission chain wheel and the idler wheel on the first chain wheel component passively and synchronously rotate, at the moment, the cloth rolling shaft transmission chain wheel drives the cloth rolling shaft to synchronously rotate, the cloth rolling shaft drives the upper moving cloth to rotate, and the moving speed of the surface, contacted with the body of the patient, of the upper moving cloth is exactly the same as the moving speed of the upper moving plate moving forwards but in the opposite direction, so that the upper moving cloth is actually kept relatively still with the body of the patient. The part of the upper moving cloth contacted with the patient is actually kept relatively still with the body of the patient; the lower moving plate moves relative to the lower moving plate, the part of the lower moving plate, which is in contact with the sickbed/operating bed, is kept relatively still with the bed surface, the binding surfaces of the upper moving plate and the lower moving plate are also kept relatively still, and the part of the upper moving plate, which is in contact with the patient, is also kept relatively still with the patient.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims (6)

1. A ratchet mechanism applied to a shifting vehicle, the shifting vehicle comprises a vehicle body with a lifting mechanism and universal castors, and a moving bed plate mechanism used for transversely moving to receive and deliver patients; the moving bed plate mechanism is arranged on a frame of the vehicle body; the moving bed plate mechanism is provided with a first connecting rod shaft, and the first connecting rod shaft rotates or stops rotating to control the upper moving cloth on the moving bed plate mechanism to stop rotating or rotating; the ratchet mechanism is used for controlling the rotation or stopping the rotation of the first connecting rod shaft on the transfer trolley; the ratchet mechanism comprises a ratchet wheel, a pawl, a spring, a cam block, a ratchet wheel motor, a limit trigger and a microswitch, wherein the ratchet wheel is sleeved on a first connecting rod shaft of the shifting vehicle; the two pawls are respectively and symmetrically arranged at the left side and the right side of the cam block; one end of each pawl is a connecting end, the other end of each pawl is a clamping end, the connecting ends of the pawls are hinged to the periphery of the ratchet wheel, and the clamping ends of the pawls are matched with ratchet wheel teeth of the ratchet wheel to lock and release the ratchet wheel; the spring is arranged on the outer side of the pawl; the cam block is fixed on a power output shaft of the ratchet motor and is positioned on the inner side of the pawl; the two limiting 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.

2. The ratchet mechanism for use on a cart according to claim 1, further comprising a mounting block, wherein the mounting block is mounted on the first link shaft via a bearing.

3. The ratchet mechanism applied to the shift trolley according to claim 2, wherein the mounting seat comprises a first mounting piece and a second mounting piece vertically connected to the bottom of the first mounting piece; the first mounting piece is provided with a notch, the first connecting rod shaft penetrates through the notch, and the ratchet wheel is fixed on the first connecting rod shaft; the pawl is hinged to one side of the first mounting piece, the ratchet motor is fixed to the other side of the first mounting piece, and a power output shaft of the ratchet extends out of the notch and is located on the inner side of the pawl; the micro switch is installed on the second installation sheet.

4. The ratchet mechanism for the shift cart as claimed in claim 3, further comprising a spring mount for mounting a spring, the spring mount being mounted on the first mounting plate, the spring having one end abutting the spring mount and the other end abutting an outer side of the pawl.

5. The ratchet mechanism for the shift cart as claimed in claim 3, wherein the micro switches are respectively mounted on the second mounting plate by means of L-shaped mounting plates.

6. A vehicle according to any of claims 1 to 5, comprising a ratchet mechanism according to any of claims 1 to 5.

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