CN113697720A - Vehicle-mounted loading and unloading equipment, vehicle-mounted loading and unloading equipment for mobile CT machine and mobile CT stroke ambulance - Google Patents

Abstract

The invention provides a vehicle-mounted loading and unloading device, a vehicle-mounted loading and unloading device for a mobile CT machine and a mobile CT stroke ambulance. The vehicle-mounted loading and unloading equipment comprises a bearing platform, a support frame, a telescopic device and a lifting device. The bearing platform is used for bearing the object to be loaded and unloaded. The support frame includes first and second support members extending in parallel and defining a first plane. The telescopic device comprises a first guide rail and a second guide rail which are arranged on the vehicle bottom plate in parallel, and a first support piece and a second support piece are respectively connected to the first guide rail and the second guide rail in a relatively sliding way. The lifting device comprises a first driving long arm, a second driving mechanism and a balance mechanism, wherein the second driving mechanism is used for driving the first driving long arm and the second driving long arm to rotate so as to enable the bearing platform to rotate to at least a first position and a second position, and the balance mechanism guides the bearing platform to rotate in parallel with the first plane all the time. The vehicle-mounted loading and unloading equipment with the structure can stably and safely load and unload objects into or from the vehicle, and is compact in structure and small in occupied space.

Description

Vehicle-mounted loading and unloading equipment, vehicle-mounted loading and unloading equipment for mobile CT machine and mobile CT stroke ambulance

Technical Field

The invention relates to a loading and unloading device and an ambulance, in particular to a vehicle-mounted loading and unloading device, a vehicle-mounted loading and unloading device for a mobile CT machine and a mobile CT stroke ambulance.

Background

The stroke is the first cause of death and disability of adult people in China, and has the characteristics of high morbidity, high mortality and high disability rate. Clinical studies have shown that the key to stroke first aid is to first determine the stroke type using a CT machine (computer tomography), so bringing the CT machine as soon as possible to the patient will win the gold time for the rescue of the patient. There are mobile CT machines in the prior art that have casters to facilitate pushing, and that can be carried by an ambulance to complete a patient's diagnosis prior to admission. However, in practice, the mobile CT machine is pushed into the hospital department for use when needed, in addition to being placed in an ambulance, and thus loading and unloading the CT machine on the ambulance constitutes a problem. The size of the movable CT machine is large, the weight of the movable CT machine is generally larger than 250 kilograms, manual carrying is time-consuming and labor-consuming, and the safety of the instrument in the carrying process cannot be guaranteed.

Disclosure of Invention

In order to overcome the problems, the invention provides a vehicle-mounted handling device, a vehicle-mounted handling device for a mobile CT machine comprising the vehicle-mounted handling device and a mobile CT stroke ambulance comprising the vehicle-mounted handling device for the mobile CT machine.

The invention provides vehicle-mounted loading and unloading equipment which comprises a bearing platform, a support frame, a telescopic device and a lifting device. The bearing platform is used for bearing an object to be loaded and unloaded and comprises a first side face and a second side face which are opposite. The support frame includes a first support and a second support extending parallel to each other, wherein the first support and the second support define a first plane. The telescopic device comprises a first guide rail and a second guide rail which are arranged on a vehicle floor in parallel, a first supporting piece and a second supporting piece are respectively connected to the first guide rail and the second guide rail in a relatively sliding manner, and the telescopic device further comprises a first driving mechanism which is designed to drive the first supporting piece and the second supporting piece to respectively slide along the first guide rail and the second guide rail synchronously. The lifting device comprises a first driving long arm and a second driving long arm, one end of the first driving long arm is relatively rotatably connected to the first side surface, the other end of the first driving long arm is relatively rotatably connected to the first supporting piece, one end of the second driving long arm is relatively rotatably connected to the second side surface, the other end of the second driving long arm is relatively rotatably connected to the second supporting piece, a connecting line between the connecting position of the first driving long arm and the first supporting piece and the connecting position of the second supporting piece and the second supporting piece defines a first axis extending perpendicular to the first supporting piece, the lifting device further comprises a second driving mechanism and a balancing mechanism, the second driving mechanism is designed to drive the first driving long arm and the second driving long arm to synchronously rotate around the first axis so as to enable the bearing platform to rotate to at least a first position and a second position relative to the supporting frame, wherein in the first position the load-bearing platform rests against the ground and in the second position the load-bearing platform is located in the first plane, the balancing mechanism being designed to guide the load-bearing platform to rotate relative to the support frame always parallel to the first plane. The vehicle-mounted loading and unloading equipment with the structure can stably and safely load and unload objects into or from the vehicle, and has compact structure and small occupied space.

Preferably, the lifting device further includes a first short arm and a second short arm, one end of the first short arm and one end of the second short arm are respectively connected to the other end of the first driving long arm and the other end of the second driving long arm to respectively form an L-shaped component with the first driving long arm and the second driving long arm, the second driving mechanism includes a first hydraulic cylinder and a second hydraulic cylinder, one end of the first hydraulic cylinder and one end of the second hydraulic cylinder are respectively connected to the other end of the first short arm and the other end of the second short arm in a relatively rotatable manner, and the other end of the first hydraulic cylinder and the other end of the second hydraulic cylinder are respectively connected to the first supporting member and the second supporting member in a relatively rotatable manner.

Preferably, the balancing mechanism includes a first balancing arm and a second balancing arm, and accommodating sliding grooves respectively opened on the first side surface and the second side surface and on the side surfaces of the first supporting member and the second supporting member facing each other, the first balancing arm and the second balancing arm are respectively and correspondingly bisected and relatively rotatably connected with the first supporting member and the second supporting member, two ends of the first balancing arm are respectively and relatively slidably accommodated in the accommodating sliding grooves 211 of the first side surface and the first supporting member, and two ends of the second balancing arm are respectively and relatively slidably accommodated in the accommodating sliding grooves of the second side surface and the second supporting member. The first driving long arm and the first balance arm having the above-mentioned features ensure that the first side and the second side of the load-bearing platform will always be parallel to the first support and the second support, respectively, whereby the load-bearing platform will always move parallel to the first plane.

Preferably, the first and second balance arms each include a first movable arm and a second movable arm having equal lengths, the first and second movable arms of the first balance arm are connected to the first driving long arm from opposite sides of the first driving long arm, respectively, and the first and second movable arms of the second balance arm are connected to the second driving long arm from opposite sides of the second driving long arm, respectively.

Preferably, the other ends of the first driving long arm and the second driving long arm are connected to the support frame by means of a first rotating shaft, the other ends of the first hydraulic cylinder and the second hydraulic cylinder are connected to the support frame by means of a second rotating shaft, and both the first rotating shaft and the second rotating shaft are arranged between the first support and the second support and extend parallel to the first axis, wherein the axis of the first rotating shaft coincides with the first axis.

Preferably, the vehicle-mounted loading and unloading device further comprises a fixed platform fixedly mounted to a vehicle floor or to the first and second rails from vertically above the first and second rails, the fixed platform and the first and second rails enclosing an accommodating space, and the accommodating space is sized to sufficiently accommodate the carrying platform, the support frame, the first driving mechanism, and the lifting device. Whole elevating gear can both be when the retraction car in the below of fixed platform in the on-vehicle handling equipment that has above-mentioned structure, therefore compact structure, and occupation space is little, has reserved bigger space for the operation in the car, and fixed platform also provides the protection to elevating gear, load-bearing platform and support frame simultaneously.

The second drive mechanism is preferably designed to also be able to rotate the load-bearing platform relative to the support frame to a third position in which the load-bearing platform is flush with or higher than the fixed platform. In the third position, the object can be easily moved or pushed from the load-bearing platform onto the stationary platform.

Preferably, a turnable baffle is arranged on the side surface of the bearing platform, which is close to the second rotating shaft, the turnable baffle is connected with the bearing platform in a relatively rotatable manner by means of a third rotating shaft, at least one torsion spring is sleeved on the third rotating shaft, two supporting legs of the torsion spring are respectively pressed against the bearing platform and the turnable baffle, and the turnable baffle is further connected to the bearing platform by means of a limiting pull rope. The turnable baffle with the characteristics forms a bridge between the bearing platform and the fixed platform in the unfolded state.

Preferably, the first drive mechanism is configured to include a chain cover, a transmission chain, a hydraulic motor, and a sprocket fitted over a drive shaft of the hydraulic motor to mesh with the transmission chain, wherein the hydraulic motor is fixedly connected to the support frame, the chain cover extends parallel to the first guide rail and is fixedly connected to the first guide rail and/or the second guide rail from vertically above the hydraulic motor, and the transmission chain is fixedly connected to a side of the chain cover facing a vehicle floor.

The invention also provides vehicle-mounted handling equipment for the mobile CT machine, wherein the mobile CT machine is provided with trundles and comprises the vehicle-mounted handling equipment, the fixed platform and the bearing platform are respectively provided with limiting pieces, and the trundles of the CT machine can be respectively connected to the fixed platform and the bearing platform in a detachable and relatively immovable manner by means of the limiting pieces. The vehicle-mounted loading and unloading device for the mobile CT machine can easily load and unload the mobile CT machine relative to the vehicle.

The invention also provides a movable CT stroke ambulance which is characterized by comprising a cab, a medical cabin and the vehicle-mounted loading and unloading equipment for the movable CT machine, wherein the medical cabin is provided with a left side door, and the first guide rail and the second guide rail are arranged on the edge position of a vehicle bottom plate and are vertical to the left side door so that the first supporting piece and the second supporting piece can extend and retract relative to the ambulance through the left side door. The movable CT stroke ambulance can fix the movable CT machine thereon to carry the movable CT machine, and can easily load and unload the movable CT machine to the vehicle through the vehicle-mounted loading and unloading equipment for the movable CT machine, so that the movable CT machine can be transferred and used between the ambulance and a hospital department as required.

Drawings

FIG. 1 is a schematic top view of a vehicle load handling apparatus according to the present invention with the fixed platform removed.

Fig. 2 and 3 are schematic views of two states of use of the lifting device.

Fig. 4 is a schematic view of the connection of the first driving long arm and the first balance arm.

Fig. 5 is a schematic view of a reversible flapper.

Fig. 6-11 are schematic views of a use of the vehicle loading and unloading device according to the present invention.

List of reference numerals

1. A load-bearing platform; 11. a first side surface; 12. a second side surface; 13. an accommodating chute of the first side surface; 14. the accommodating sliding chute is arranged on the second side surface; 2. a support frame; 21. a first support member; 211. the accommodating chute of the first supporting piece; 22. a second support member; 3. a telescoping device; 31. a first guide rail; 32. a second guide rail; 33. a first drive mechanism; 331. a chain cover plate; 332. a drive chain; 333. a hydraulic motor; 4. a lifting device; 41. a first driving long arm; 42. a first short arm; 43. a second driving long arm; 44. a second short arm; 45. a first hydraulic cylinder; 46. a second hydraulic cylinder; 47. a first movable support arm of the first balance arm; 48. a second movable support arm of the first balance arm; 49. a first movable support arm of the second balance arm; 410. a second movable support arm of the second balance arm; 411. a first rotating shaft; 412. a second rotating shaft; 413. a third rotating shaft; 5. a fixed platform; 6. the baffle can be turned over; 7. a limiting pull rope; 8. and a limiting member.

Detailed Description

Referring now to the drawings, illustrative aspects of the disclosed structure will be described in detail. Although the drawings are provided to present embodiments of the invention, the drawings are not necessarily to scale of particular embodiments, and certain features may be exaggerated, removed, or partially sectioned to better illustrate and explain the present disclosure.

Certain directional terms used hereinafter to describe the accompanying drawings will be understood to have their normal meanings. In particular, the directional terms "lateral" or "sideways" refer to the left and right hand sides of the rescue capsule as viewed from the rear forward (i.e., in the direction toward the cab) within the rescue capsule, where the left hand side is the left side. Unless otherwise indicated, other directional terms described herein generally refer to conventional directions as understood by those skilled in the art.

Fig. 1 shows a schematic top view of a truck-mounted loading and unloading device according to the invention, with the fixed platform 5 removed to better show the structure to be arranged below the fixed platform 5. The vehicle-mounted loading and unloading equipment mainly comprises a bearing platform 1, a support frame 2, a telescopic device 3 and a lifting device 4, wherein the support frame 2 can extend out of and retract into a vehicle under the action of the telescopic device 3. The load-bearing platform 1, which is used to carry the object to be handled, is connected to the support frame 2 so that it can also extend and retract the vehicle as the support frame 2 moves. When the load-bearing platform 1 extends out of the vehicle, it can be rotated to at least two positions, namely a first position and a second position, relative to the support frame 2 under the drive of the lifting device 4. In a first position (e.g. the position shown in fig. 7) the load carrying platform rests against the ground where the CT machine can be pushed onto the load carrying platform 1, and in a second position (e.g. the position shown in fig. 6) the load carrying platform 1 will be in the same plane as the support frame 2 where the object to be handled can enter or leave the vehicle as the support frame 2 is extended and retracted into the vehicle. The object to be loaded and unloaded is described hereinafter by way of example in a mobile CT machine.

Referring to fig. 1 and 2, the load-bearing platform 1 includes opposing first and second sides 11, 12. The support frame 2 comprises a first support 21 and a second support 22 extending parallel to each other, wherein the first support 21 and the second support 22 can define only one plane, which is also referred to herein as the first plane.

The telescopic device 3 comprises a first guide rail 31 and a second guide rail 32 mounted parallel to each other on the floor of the vehicle. The first and second supports 21 and 22 are relatively slidably connected to the first and second rails 31 and 32, respectively, to slide in and out of the first and second rails 31 and 32 on the sections. The first support 21 and the second support 22 can realize a sliding movement along the first guide rail 31 and the second guide rail 32 by means of a sliding member, such as a pulley or a slider. The sliding part can also be a two-stage sliding rail or a three-stage sliding rail in the prior art. The first rail 31 and the second rail 32 are generally arranged at edge positions of the floor of the vehicle, whereby the sliding of the first support 21 and the second support 22 in and out of the first rail 31 and the second rail 32 on the section can also be seen as the extending and retracting of the first and second supports 22 on the section of the vehicle.

The telescopic device 3 further comprises a first drive mechanism 33 for driving the first support 21 and the second support 22 to perform a sliding movement along the first guide 31 and the second guide 32, respectively. In a preferred example, the first driving mechanism 33 is a chain type lateral moving mechanism. Specifically, the chain-type lateral movement mechanism may include a chain cover 331, a drive chain 332, a hydraulic motor 333, and a sprocket (not shown). The hydraulic motor 333 is fixedly mounted on the support frame 2, for example with its housing connected to one or both of the first and second supports 21, 22 by means of a connecting rod. The chain cover 331 extends parallel to the first guide rail 31 and is fixedly connected to one or both of the first guide rail 31 and the second guide rail 32 from vertically above the hydraulic motor 333, for example, in fig. 1 both ends of the chain cover 331 are connected to the first guide rail 31 and the second guide rail 32 by means of two connecting rods, respectively. The chain cover 331 is also received in a receiving space described below. A drive chain 332 is fixedly attached to the side of the chain cover 331 facing the vehicle floor, and a sprocket is provided on a drive shaft of the hydraulic motor 333 to mesh with the drive chain 332 from the side of the chain cover 331 facing the vehicle floor. When the hydraulic motor 333 is activated, for example, when the driving shaft of the hydraulic motor 333 is turned clockwise, the chain wheel will move from B to a direction relative to the chain, that is, the whole support frame 2 will be driven from B to a, and the support frame 2 will be partially extended out of the vehicle; when the drive shaft of the hydraulic motor 333 is rotated in a counterclockwise direction, the sprocket will move relative to the chain from a to B, i.e. drive the entire support frame 2 from a to B, thereby retracting the support frame 2 into the vehicle. Where A represents a location outside the vehicle and B represents a location inside the vehicle.

Although not shown, it should be understood by those skilled in the art that the first driving mechanism 33 may also adopt other structures known in the art, such as a gear-rack kinematic pair or a worm-gear transmission structure, so as to realize the sliding of the support frame 2 along the first guide rail 31 and the second guide rail 32, which will not be described in detail herein.

The lifting device 4 includes, as shown in fig. 2 and 3, a first driving long arm 41 and a second driving long arm 43, a balancing mechanism, and a second driving mechanism. The first driving long arm 41 and the second driving long arm 43 are used for connecting the first side 11 and the second side 12 of the load-bearing platform 1 to the first support 21 and the second support 22, respectively, so that the load-bearing platform 1 will be extended out of the vehicle as the first support 21 and the second support 22 slide out of the first rail 31 and the second rail 32.

Specifically, one end of the first driving long arm 41 is relatively rotatably connected to the first side surface 11 of the carrying platform 1, and the other end is relatively rotatably connected to the first support 21. Similarly, one end of the second driving long arm 43 is relatively rotatably connected to the second side 12 of the carrying platform 1, and the other end is relatively rotatably connected to the second supporting member 22. Herein, a line between the connection position of the first driving long arm 41 and the first support 21 and the connection position of the second driving long arm 43 and the second support 22 is referred to as a first axis. The first axis extends perpendicular to the first support. Preferably, the other ends of the first driving long arm 41 and the second driving long arm 43 are connected to the first support 21 and the second support 22, respectively, by means of a common first rotating shaft 411, wherein the first rotating shaft 411 is arranged between the first support 21 and the second support 22, the axis of which will coincide with the above-mentioned first axis.

The second driving mechanism is used for driving the first driving long arm 41 and the second driving long arm 43 to synchronously rotate around the first axis, so that the first driving long arm 41 and the second driving long arm 43 can drive the bearing platform 1 to rotate around the first axis. Ideally, the second driving mechanism is capable of driving the first driving long arm 41 and the second driving long arm 43 to rotate 360 degrees around the first axis. In order to complete the loading and unloading function, the second driving mechanism is required to be capable of driving the first and second driving long arms to rotate the carrying platform 1 to at least the first position and the second position.

In order to prevent the CT machine from falling off obliquely during the rotation of the carrying platform 1, no matter the first driving long arm 41 and the second driving long arm 43 drive the carrying platform 1 to rotate to any position relative to the first supporting member 21 and the second supporting member 22, the carrying platform 1 should be kept parallel to the first plane, so that the first side edge and the second side edge of the carrying platform 1 corresponding to the first side surface 11 and the second side surface 12 should be kept parallel to the first supporting member 21 and the second supporting member 22, respectively. In this regard, the first side edge and the second side edge may be considered as two lines extending parallel to the longitudinal direction of the first side surface and the second side surface, respectively, within the first side surface and the second side surface.

The guiding of the rotation of the load-bearing platform 1 relative to the support frame 2 always parallel to the first plane is achieved here by means of a balancing mechanism. In a preferred example, the balancing mechanism comprises a first balancing arm arranged crosswise to the first driving long arm 41 in halves and able to rotate with respect to each other, for example by means of a pin, and a second balancing arm arranged crosswise to the second driving long arm 43 in halves and able to rotate with respect to each other by means of a pin.

The first and second balance arms slide with respect to the load-bearing platform 1 and the first and second supports 21 and 22 as the first and second driving long arms 41 and 43 rotate with respect to the first and second supports 21 and 22, respectively. In particular, receiving chutes are respectively provided on the first side 11 and the second side 12 of the load-bearing platform 1 and on the sides of the first support 21 and the second support 22 facing each other. One end of the first balance arm is relatively slidably received in the receiving chute 13 of the first side surface 11, and the other end is relatively slidably received in the corresponding receiving chute 211 of the first support 21. Similarly, one end of the second balance arm is relatively slidably received in the receiving chute 14 of the second side 12, and the other end is relatively slidably received in the corresponding receiving chute of the second support 22. The ends of the first and second balance arms may be received in corresponding receiving runners, for example by means of sliders.

The first balance arm and the first driving long arm 41 are described as an example. According to the determination principle of the parallelogram, that is, the parallelogram whose diagonal lines are bisected by each other is known as a parallelogram, when the first balance arm and the first driving long arm 41 are regarded as two diagonal lines of a parallelogram, the first side edge and the first support 21 can be regarded as a set of opposite edges of the parallelogram, and both will always remain parallel. Similarly, the second side edge and the second support member 22 can also be regarded as a set of opposite sides of a parallelogram and remain parallel, whereby the plane defined by the first side edge and the second side edge (i.e. the plane in which the load-bearing platform 1 is located) will always remain parallel to the first plane regardless of the change in the angle between the driving long arm and the balance arm.

More preferably, as shown in fig. 2 to 4, each of the first and second balance arms includes first and second movable arms of equal length. Taking the first balance arm as an example, one end of the first movable arm 47 of the first balance arm slides in the accommodating slide groove 211 of the first support 21 by means of a slide block, and one end of the second movable arm 48 of the first balance arm slides in the accommodating slide groove 13 of the first side surface by means of a slide block. The other end of the first movable arm 47 and the other end of the second movable arm 48 are connected to the first long driving arm 41 from both sides of the first long driving arm 41 by means of a common shaft pin, which is positioned particularly at the middle position of the long driving arm in the length direction, as seen in fig. 4, H1 ═ H2, H3 ═ H4, where H3 and H4 are the lengths of the first movable arm 47 and the second movable arm 48, respectively, and H1 and H2 are the lengths of the two sections of the first long driving arm 41 divided by the first balance arm. Similarly, the first movable arm 49 and the second movable arm 410 of the second balance arm are also connected to the second long driving arm 43 from both sides of the second long driving arm 43 facing each other, respectively.

In addition, although not shown, the balancing mechanism may also take other configurations known in the art. For example, an additional motor and a sensor are provided at the position where the first driving long arm 41 is connected with the first side 11, a motor shaft of the motor is inserted into the carrying platform 1 to drive the carrying platform 1 to rotate, and when the sensor senses that the carrying platform 1 is inclined with respect to the first plane, the motor operates to rotate the carrying platform 1 with respect to the first driving long arm 41 and the second driving long arm. In addition, the first balance arm and the first driving long arm 41 can also form a four-bar linkage mechanism, and the operation principle of the four-bar linkage mechanism is known in the prior art and is not described in detail herein.

The second drive mechanism may employ two hydraulic cylinders, i.e., a first hydraulic cylinder 45 and a second hydraulic cylinder 46. The two hydraulic cylinders will act mainly on the other ends of the first driving long arm 41 and the second driving long arm 43, which are connected to the first support 21 and the second support 22, respectively. In order to achieve the rotation of the first driving long arm 41 and the second driving long arm 43 with respect to the first support 21 and the second support 22, the lifting device 4 further includes a first short arm 42 and a second short arm 44. One end of the first short arm 42 is connected to the other end of the first driving long arm 41 to form an L-shape with the first driving long arm 41. Similarly, one end of the second short arm 44 is connected to the other end of the second driving long arm 43 to form an L-shape with the second driving long arm 43. The "L-shape" herein covers an arrangement in which the respective long and short arms are not arranged in a line but are not necessarily at 90 ° to each other. Preferably, the first short arm 42 and the first long driving arm 41 are made in a single piece, and the second short arm 44 and the second long driving arm 43 are made in a single piece.

One end of the first hydraulic cylinder 45 (herein, one end of the piston of the hydraulic cylinder which extends and retracts) is relatively rotatably connected to the other end of the first short arm 42, and the other end of the first hydraulic cylinder 45 is relatively rotatably connected to the first support 21. One end of the second hydraulic cylinder 46 (herein, one end of the piston of the hydraulic cylinder) is relatively rotatably connected to the other end of the second short arm 44, and the other end of the second hydraulic cylinder 46 is relatively rotatably connected to the second support 22. The other ends of the first and second hydraulic cylinders 45, 46 are preferably connected to the support frame 2 by means of a common second shaft 412. Wherein the second rotation axis 412 is arranged between the first support 21 and the second support 22 and also extends parallel to the first axis.

When it is desired to rotate the load carrying platform 1 down, for example from the position of fig. 2 to the position of fig. 3, the pressure relief function of the hydraulic cylinders is activated, the pistons of the first and second hydraulic rams slowly extend outwards under the influence of the weight of the load carrying platform 1 (in which case the hydraulic cylinders act as damping), and the load carrying platform 1 will rotate in a counter-clockwise direction, for example about the first axis in fig. 2. When it is desired to rotate the load carrying platform 1 up, for example from the position of figure 3 to the position of figure 2, the hydraulic pumps are used to inject high pressure oil into the first and second cylinders to push the pistons of the cylinders back, at which point the load carrying platform 1 will rotate clockwise about the first axis.

The first and second hydraulic cylinders are preferably electrically driven, but may also be provided with a manual back-up pump and solenoid operated manual switch, by means of which the operation of the hydraulic cylinders can be controlled in the event of a failure of the electrical control system.

Of course, the second driving mechanism is not limited to the use of the hydraulic cylinder, and an alternative is to use two motors respectively disposed at the connecting positions of the two driving long arms and the first and second supports 21 and 22. The motor housings are accommodated in the first support member 21 and the second support member 22 so as to be relatively non-rotatable, the motor shafts of the motors protrude out of the first support member 21 and the second support member 22, the two driving long arms are respectively coupled to the motor shafts of the motors so as to be relatively non-rotatable, and the two motors operate synchronously. It is also possible to use only one electric motor or hydraulic cylinder to drive the second shaft in rotation. The first driving long arm 41 and the second driving long arm 43 can also be connected to the first rotating shaft 411 in a non-rotatable manner, and the second driving mechanism directly drives the first rotating shaft 411 to rotate relative to the supporting frame 2.

When the bearing platform 1 is located at the second position, the bearing platform can drive the CT machine placed on the bearing platform at the first position to enter the vehicle, and at the moment, the loading task of the CT machine is completed. However, referring to fig. 1, when the platform 1 is retracted into the vehicle, i.e. completely slid between the first rail 31 and the second rail 32, the two rails and the first support 21 and the second support 22 may interfere with the operation of the instruments by the medical staff, and the hydraulic cylinder, the hydraulic motor, etc. are exposed to the outside and are very vulnerable to human damage. In order to solve the above problem, the truck-mounted loading and unloading device of the present invention further comprises a fixed platform 5, see fig. 6.

The fixed platform 5 is herein mounted to the floor of the vehicle vertically above the first and second rails 31, 32, or may also be mounted directly to one or both of the rails, whereby the fixed platform 5 will enclose an accommodation space together with the first and second rails 31, 32. The CT machine is pushed onto the fixed platform 5, and the carrying platform 1, the supporting frame 2, the first driving mechanism 33 and the lifting device 4 are accommodated in the accommodating space. In the prior art, a structure that a secondary lifting mechanism is adopted to enable the bearing platform 1 to vertically slide up and down after extending out of a vehicle exists, but the structure has the defects that the secondary lifting mechanism extends perpendicular to a vehicle bottom plate all the time and is close to and positioned at the central position of the vehicle after being retracted into the vehicle, the occupied space is large, the passage of workers is interfered, and the structure is not suitable for compact vehicles such as ambulances. The lifting device 4, the bearing platform 1, the support frame 2, the first driving mechanism 33 and the like can be hidden in the accommodating space, when no instrument needs to be installed in the vehicle, other objects can be placed on the fixed platform 5, the use space in the vehicle is enlarged, and the bearing platform 1, the support frame 2, the first driving mechanism 33, the lifting device 4 and the like are protected.

As can be seen from the above, the height of the fixed platform 5 should be higher than the second position, so the second driving mechanism should also drive the first driving long arm and the second driving long arm to make the bearing platform 1 rotate to the third position higher than or flush with the fixed platform 5, so that the object on the bearing platform 1 can be pushed onto the fixed platform 5.

When the load-bearing platform 1 is in a third position, for example the position shown in fig. 9, there is inevitably a certain clearance between the load-bearing platform 1 and the fixed platform 5. If the gap is much smaller than the diameter of the caster of the mobile CT machine, the gap will not affect the rolling of the CT machine from the carrying platform 1 to the fixed platform 5, and can be ignored. However, if the gap is not negligible with respect to the diameter of the caster of the mobile CT machine, a transition plate is required to be disposed at the gap.

Here a turnable flap 6 is arranged on the side of the load-bearing platform 1 facing the second rotation axis 412 to serve as a transition plate, as shown in fig. 5. The pivotable flap 6 is coupled to the support platform 1 by means of a third pivot 413 in a snap-fit manner. At least one torsion spring is sleeved on the third rotating shaft 413, preferably a plurality of torsion springs are arranged at intervals, and two legs of the torsion springs are pressed against the bearing platform 1 and the turnable baffle 6 respectively to provide a torque for the turnable baffle 6 to rotate towards the fixed platform 5. In addition, a limit pull rope 7 can be arranged, one end of the limit pull rope 7 is connected to the bearing platform 1, the other end of the limit pull rope 7 is connected to the turnover baffle 6, and when the limit pull rope 7 is manually or automatically pulled, the included angle between the turnover baffle 6 and the bearing platform 1 can be adjusted. In addition, it is preferable that a limiting roller is disposed on the fixed platform 5 at a third position, which faces the side of the turnable flap 6, and the turnable flap 6 abuts against the limiting roller when passing through the fixed platform 5, so as to fold the turnable flap into the accommodating space.

When the turnable baffle 6 needs to be used, the limiting pull rope 7 does not apply force, and the turnable baffle 6 rotates towards the fixed baffle (which can also be expressed as that the turnable baffle is unfolded) under the action of the torsion spring so as to be lapped on the fixed platform 5. When the roll-over flipper 6 is not needed, i.e. the roll-over of the roll-over flipper 6 may hinder the movement of the load carrying platform 1, the position limiting rope 7 is manually or automatically tightened so that the roll-over flipper 6 rotates towards the load carrying platform 1 to stand up with respect to the load carrying platform 1.

It is also preferred to provide a flap on the side of the support platform 1 facing away from the vehicle when the latter is extended, which flap allows the CT machine to be pushed smoothly from the ground onto the support platform 1.

Although the above-mentioned objects to be loaded and unloaded are described by taking a mobile CT machine as an example, the vehicle-mounted loading and unloading device herein is not limited to loading and unloading the CT machine, and other objects with the size and weight conforming to the loading capacity of the loading platform 1 and the fixed platform 5 can be loaded and unloaded by using the vehicle-mounted loading and unloading device herein. When the target object to be attached or detached does not have an auxiliary traveling structure such as a caster or a ball wheel, the stopper 8 may be omitted.

In addition, a vehicle-mounted handling device for moving a CT machine is also provided, which includes a stopper in addition to the vehicle-mounted handling device. Specifically, when the mobile CT machine is placed on the carrying platform 1 or the fixed platform 5, the casters of the mobile CT machine roll relative to the carrying platform 1 or the fixed platform 5 under slight vibration, and in order to prevent the CT machine from rolling out of the carrying platform 1 and the fixed platform 5, it is preferable to provide a limiting member 8 on each of the fixed platform 5 and the carrying platform 1, so as to detachably and immovably fix the casters of the CT machine to the carrying platform 1 or the fixed platform 5, thereby preventing the CT machine from shifting relative to the carrying platform 1 or the fixed platform 5. The limiting member 8 may be, for example, a fixed bolt or a plastic buckle, and a fixed bolt may be correspondingly disposed on each caster of the CT machine.

In addition, the invention also provides an ambulance, in particular a mobile CT stroke ambulance, which is fixedly provided with the vehicle-mounted loading and unloading equipment for the mobile CT machine. Specifically, the ambulance comprises a cab and a medical cabin, wherein the medical cabin is additionally provided with a left side door for loading and unloading a CT machine or other medical equipment besides a back door and a right side door which are arranged on the existing ambulance. Wherein the first guide rail 31 and said second guide rail 32 are provided at the floor of the vehicle perpendicularly to said left side door and are arranged at the edge positions of the floor of the vehicle so that the first support 21 and said second support 22 will be extended and retracted into said ambulance through said left side door.

The loading of a CT machine into an ambulance using the truck-mounted handling equipment according to the present invention will be briefly described with reference to fig. 6-10. In a first step, the left door of the ambulance is opened and the hydraulic motor 333 is started to extend the load-bearing platform 1 completely out of the vehicle from the accommodation space, as shown in fig. 6. Next, as shown in fig. 7, the pressure relief function of the first and second hydraulic cylinders is turned on, so that the supporting platform 1 rotates and descends to the first position, the bolt shafts of the fixed bolts on the supporting platform 1 are opened, the CT machine is pushed onto the supporting platform 1, the four casters of the CT machine correspondingly enter the four fixed bolts respectively, and then the bolt shafts are fixed. Next, the first and second cylinders are pressurized so that the pistons retract, causing the platform 1 to rotate clockwise up to the second position and further up to a third position, as shown in fig. 8 and 9, where the flipper 6 overlaps the stationary platform 5. Next, the shaft pin for fixing the latch is released, the CT machine is pushed onto the fixing platform 5 as shown in fig. 10, and then the shaft pin for fixing the latch on the fixing platform 5 is used to fix the CT machine. Next, the first and second opening hydraulic cylinder relief functions again, so that the load-bearing platform 1 rotates counterclockwise and descends to the second position, i.e. returns to the state shown in fig. 6. Finally, the hydraulic motor 333 is turned on again, so that the supporting frame 2 and the carrying platform 1 slide into the accommodating space, as shown in fig. 11. Similarly, the procedure for unloading the CT machine from the ambulance is the reverse of the above-described procedure.

The vehicle loading and unloading apparatus is preferably provided with a handlebar in which a controller is provided to control the operation of the first drive mechanism 33 and the second drive mechanism. A position sensor is preferably provided on the support frame 2 which can communicate with a controller in the operating handle to control the operation of the hydraulic motor 333 of the first drive mechanism 33. A travel control assembly may also be provided for the vehicle loading and unloading apparatus which sends a signal to the controller to stop operation of the hydraulic cylinder of the second drive mechanism when the load carrying platform 1 is rotated to a set height, so that the load carrying platform 1 is locked at the current height.

It is also preferred that the vehicle loading/unloading apparatus is provided with an audible and visual alarm system to alert the operator and surrounding pedestrians during operation of the apparatus.

The vehicle-mounted loading and unloading equipment has the advantages of stable lifting, large load capacity, convenience in use and the like, has a pull-out structure which occupies small space and is compact in structure, and is suitable for various vehicle types, particularly small vehicles such as ambulances.

Claims (11)

1. An on-board loading and unloading device, comprising:

the bearing platform (1) is used for bearing an object to be loaded and unloaded and comprises a first side surface (11) and a second side surface (12) which are opposite;

a support frame (2) comprising a first support (21) and a second support (22) extending parallel to each other, wherein the first support (21) and the second support (22) define a first plane;

-a telescopic device (3) comprising a first guide rail (31) and a second guide rail (32) mounted parallel to each other on a vehicle floor, the first support (21) and the second support (22) being relatively slidably connected to the first guide rail (31) or the second guide rail (32), respectively, -the telescopic device (3) further comprising a first drive mechanism (33), the first drive mechanism (33) being designed to drive the first support (21) and the second support (22) to slide synchronously along the first guide rail (31) or the second guide rail (32), respectively;

lifting device (4) comprising a first driving long arm (41) and a second driving long arm (43), said first driving long arm (41) being connected relatively rotatably at one end to said first side (11) and at the other end to said first support (21), said second driving long arm (43) being connected relatively rotatably at one end to said second side (12) and at the other end to said second support (22), wherein a line between a connection position of said first driving long arm (41) and said first support (21) and a connection position of said second driving long arm (43) and said second support (22) defines a first axis extending perpendicularly to said first support (21), said lifting device (4) further comprising a second driving mechanism and a balancing mechanism, said second driving mechanism being designed to drive said first driving long arm (41) and said second driving long arm (43) Synchronously about the first axis so that the load-bearing platform (1) is rotatable with respect to the support frame (2) at least into a first position in which the load-bearing platform (1) rests against the ground and into a second position in which the load-bearing platform (1) lies in the first plane, the balancing mechanism being designed to guide the load-bearing platform (1) to rotate with respect to the support frame always parallel to the first plane.

2. The vehicle-mounted loading and unloading apparatus according to claim 1, wherein the lifting device further includes a first short arm and a second short arm, one ends of the first short arm and the second short arm are connected to the other ends of the first long driving arm and the second long driving arm, respectively, to form an L-shaped member with the first long driving arm and the second long driving arm, respectively, and the second driving mechanism includes a first hydraulic cylinder and a second hydraulic cylinder, one ends of the first hydraulic cylinder and the second hydraulic cylinder are relatively rotatably connected to the other ends of the first short arm and the second short arm, respectively, and the other ends of the first hydraulic cylinder and the second hydraulic cylinder are relatively rotatably connected to the first support member and the second support member, respectively.

3. The vehicle-mounted loading and unloading device according to claim 2, wherein the balancing mechanism comprises a first balancing arm and a second balancing arm and accommodating sliding grooves respectively formed in the first side surface and the second side surface and the side surfaces of the first supporting member and the second supporting member facing each other, the first balancing arm and the second balancing arm are respectively and correspondingly halved with the first supporting member and the second supporting member and are relatively rotatably connected with each other, two ends of the first balancing arm are respectively and relatively slidably accommodated in the accommodating sliding grooves of the first side surface and the first supporting member, and two ends of the second balancing arm are respectively and relatively slidably accommodated in the accommodating sliding grooves of the second side surface and the second supporting member.

4. A vehicle load-and-unload apparatus according to claim 3, wherein said first and second balance arms each comprise first and second movable arms of equal length, said first and second movable arms of said first balance arm being connected to said first driving long arm from respective opposite sides of said first driving long arm, and said first and second movable arms of said second balance arm being connected to said second driving long arm from respective opposite sides of said second driving long arm.

5. The vehicle-mounted loading and unloading device according to claim 4, wherein the other ends of the first and second driving long arms are connected to the support frame by means of a first rotating shaft, the other ends of the first and second hydraulic cylinders are connected to the support frame by means of a second rotating shaft, and both the first and second rotating shafts are arranged between the first and second support members and extend parallel to the first axis, wherein the axis of the first rotating shaft coincides with the first axis.

6. The vehicle loading and unloading apparatus of claim 5, further comprising a fixed platform fixedly mounted to a floor of the vehicle or to the first and second rails vertically above the first and second rails, the fixed platform and the first and second rails defining a receiving space sized to receive the load-bearing platform, the support frame, the first drive mechanism, and the lifting device.

7. A vehicle load handling apparatus according to claim 6 wherein said second drive means is arranged to also rotate said load carrying platform relative to said support frame to a third position in which said load carrying platform is flush with or above said fixed platform.

8. The vehicle-mounted loading and unloading device according to claim 7, wherein a turnable baffle is arranged on the side of the bearing platform close to the second rotating shaft, the turnable baffle is relatively rotatably connected with the bearing platform through a third rotating shaft, at least one torsion spring is sleeved on the third rotating shaft, two legs of the torsion spring are respectively pressed against the bearing platform and the turnable baffle, and the turnable baffle is further connected to the bearing platform through a limiting pull rope.

9. The vehicle loading and unloading device according to claim 1, wherein the first drive mechanism is configured to include a chain cover, a drive chain, a hydraulic motor, and a sprocket fitted over a drive shaft of the hydraulic motor to engage with the drive chain, wherein the hydraulic motor is fixedly connected to the support frame, the chain cover extends parallel to the first guide rail and is fixedly connected to the first guide rail and/or the second guide rail from vertically above the hydraulic motor, and the drive chain is fixedly connected to a side of the chain cover facing a vehicle floor.

10. A vehicle-mounted handling device for a mobile CT machine, said mobile CT machine having casters, characterized by comprising a vehicle-mounted handling device according to any of claims 6 to 9, wherein limit stops are provided on said fixed platform and said load-bearing platform, respectively, and the casters of the CT machine are detachably and non-relatively movably connected to said fixed platform and said load-bearing platform, respectively, by means of said limit stops.

11. A mobile CT stroke ambulance comprising a cab, a medical cabin and the mobile CT machine vehicle loading and unloading device of claim 10, wherein said medical cabin is provided with a left door, and said first and second rails are disposed at the edge of the floor of the vehicle perpendicular to said left door so that said first and second supports extend and retract through said left door with respect to said ambulance.

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