CN111938931A - Up-down stair type stretcher - Google Patents
Up-down stair type stretcher Download PDFInfo
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- CN111938931A CN111938931A CN202010859448.4A CN202010859448A CN111938931A CN 111938931 A CN111938931 A CN 111938931A CN 202010859448 A CN202010859448 A CN 202010859448A CN 111938931 A CN111938931 A CN 111938931A
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- stretcher
- frame
- hinged
- wheel
- rotary joint
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G1/00—Stretchers
- A61G1/02—Stretchers with wheels
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G1/00—Stretchers
- A61G1/013—Stretchers foldable or collapsible
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G1/00—Stretchers
- A61G1/04—Parts, details or accessories, e.g. head-, foot-, or like rests specially adapted for stretchers
Abstract
The invention discloses an upstairs and downstairs stretcher, which comprises a stretcher structure, a calf stretcher plate, a thigh stretcher plate, a waist stretcher plate and a back stretcher plate which are sequentially fixed on the stretcher structure, wherein folding guardrails are arranged on two sides of the stretcher structure, a sliding platform is arranged below the stretcher structure in a sliding manner, an L-shaped support frame is fixedly arranged below the sliding platform, one end of the support frame is hinged with a cylinder body end of a first servo electric cylinder, the other end of the support frame is hinged with a motor end of a second servo electric cylinder, a motor end of the first servo electric cylinder is hinged with a rotary joint, a cylinder body end of the second servo electric cylinder is fixed with the rotary joint, the lower end of the rotary joint is fixedly connected with a crawler mechanism, two wheel-track conversion structures are symmetrically arranged on the inner side of the crawler mechanism and the bottom of the rotary joint, and the two wheel-track conversion structures are hinged, the invention has simple structure, is applied to more occasions, is convenient to disassemble, assemble and maintain and has low manufacturing cost.
Description
Technical Field
The invention relates to the field of medical equipment, in particular to an upstairs and downstairs stretcher.
Background
In recent years, high-rise buildings have been increased. Due to the incomplete early supporting facilities, a considerable number of buildings in the existing high-rise buildings are not provided with elevators capable of accommodating the stretcher to work normally, and the condition that the wounded are not timely transferred due to overhigh floors so as to miss the optimal treatment time often occurs. The labor intensity of medical staff is too high when the patient is manually transferred in the staircase. Therefore, the stretcher with the ambulance has higher requirements for the phenomenon. The medical rescue device can meet rescue requirements, ensure stability and safety, shorten rescue time, and reduce physical labor of medical staff, and is simple and convenient to operate.
The building climbing mechanism has a long history, the theoretical research result is rich, and a certain amount of actual products are provided. However, there are many situations that the structure and the control system are complicated, the manufacturing cost is high, the working efficiency is low, and the like, so that the wide-range application cannot be realized. The research of the downstairs stretcher mechanism is lagged, and no relatively mature product exists.
Disclosure of Invention
The invention provides an upstairs and downstairs stretcher, which is a downstairs and downstairs stretcher convenient for medical staff to transfer patients in a staircase.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a go up stair formula stretcher, includes the stretcher structure, is fixed in the structural shank stretcher board of stretcher, thigh stretcher board, waist stretcher board and back stretcher board in proper order, the both sides of stretcher structure are provided with folding guardrail, the below slip of stretcher structure is provided with sliding platform, sliding platform's the fixed support frame that is provided with the L shape in below, the one end of support frame is articulated with the cylinder body end of first servo electric jar, the other end is articulated with the motor end of second servo electric jar, the motor end of first servo electric jar is articulated with rotary joint, the cylinder body end of second servo electric jar is fixed with rotary joint, rotary joint's lower extreme fixedly connected with crawler, crawler's inboard, rotary joint's bottom symmetry is provided with two wheel-track conversion structures and two wheel-track conversion structures are articulated.
The technical scheme of the invention is further improved as follows: the stretcher structure comprises a stretcher frame support, a waist stretcher frame is fixedly mounted on the stretcher frame support, two ends of the waist stretcher frame are respectively hinged with a thigh stretcher frame and a back stretcher frame which are movably arranged on the stretcher frame support through first rotating hinges, the thigh stretcher frame is hinged with a shank stretcher frame through first rotating hinges, the front edge of the shank stretcher frame is fixedly connected with a second shaft end mounting platform through second rotating hinges, a rotating handle is arranged on the second shaft end mounting platform, a first shaft end mounting platform is fixedly arranged on the stretcher frame support corresponding to the hinged position of the waist stretcher frame and the back stretcher frame, a back supporting rod is hinged between the first shaft end mounting platform and the back stretcher frame, and two optical axes are fixedly arranged between the first shaft end mounting platform and the second shaft end mounting platform, the stretcher is characterized in that a lead screw and one end of the lead screw are fixedly connected with a rotating handle and the other end of the lead screw is movably connected with a first shaft end mounting platform, and a lead screw sliding block fixed on a stretcher frame support and the lead screw sliding block move relatively are arranged on the lead screw.
The technical scheme of the invention is further improved as follows: the stretcher frame support is fixedly provided with a plurality of linear bearings with seats, and the optical axis penetrates through the linear bearings with seats and then is respectively and fixedly connected with a first shaft end mounting platform and a second shaft end mounting platform.
The technical scheme of the invention is further improved as follows: the bottom that the stretcher frame supported is provided with two linear guide in parallel, slide platform slides along two linear guide.
The technical scheme of the invention is further improved as follows: sliding platform includes supporting platform, supporting platform's four corners is provided with four slip tables and slip table and linear guide sliding fit, supporting platform's top is provided with ball and passes the fixed slider that sets up in the supporting platform top, the fixed two ball supports that are provided with in bottom that the stretcher frame supported, ball's one end is fixed set up on a ball support, the other end passes behind another ball support with the coupling joint, a first servo motor of coupling joint.
The technical scheme of the invention is further improved as follows: the rotary joint comprises a joint upper box body, the upper portion of the joint upper box body is hinged to a motor end of a first servo electric cylinder, large gears are fixedly arranged inside two sides of the joint upper box body, the outer portion of the joint upper box body is movably connected with a rotary joint lower box body, the rotary joint lower box body rotates relative to the joint upper box body, a second servo motor is fixedly arranged on the rotary joint lower box body and is connected with a first worm gear reducer, the two extending ends of an output shaft of the first worm gear reducer, which are stepped shafts, are provided with small gears, and the small gears are meshed with the large gears to transmit power.
The technical scheme of the invention is further improved as follows: the crawler mechanism comprises two walking part supports, a crawler combination board is arranged between the two walking part supports, the lower box body of the rotating joint is fixedly arranged on the crawler combination board, the walking part supports are provided with a driving wheel shaft and a driving wheel shaft, one end of the driving wheel shaft is connected with a second worm gear reducer, one end of the second worm gear reducer is connected with a third servo motor, the other end of the second worm gear reducer is connected with a driving wheel, the driving wheel transmits power to a driving wheel arranged on the driving wheel shaft through a chain, and the driving wheel is meshed with a crawler.
The technical scheme of the invention is further improved as follows: the wheel-track conversion structure comprises a wheel-foot support frame, a wheel foot, a first connecting rod, a rocker, a second connecting rod, a crank and a clutch, wherein the clutch is fixedly connected with a second worm gear reducer, one end of the crank is rotatably connected with the clutch, the rocker is rotatably connected with a walking part support, two ends of the second connecting rod are respectively hinged with the rocker and the crank, the wheel-foot support frame is hinged with the hinged point of the rocker through the first connecting rod and the second connecting rod, and the wheel foot is arranged at the bottom of the wheel-foot support frame.
The two sides of the wheel foot support frame are hinged to the walking part support through first connecting rods, and wheel feet are arranged at the bottom of the wheel foot support frame.
Due to the adoption of the technical scheme, the invention has the technical progress that:
1. the multifunctional folding device has a simple structure, has five motion modes, has the functions of going upstairs, going downstairs, wheel-track switching, lifting folding and stretcher folding, has powerful functions, can be applied to more occasions, is convenient to disassemble, assemble and maintain, and has low manufacturing cost;
2. the stretcher mechanism designed by the invention can automatically transfer patients in the stairwell, and the stretcher can provide different supports for different body poses for the patients in the transferring process. The horizontal posture of the patient can be kept in the process of going upstairs and downstairs, so that the aim of stability and safety is fulfilled;
3. the wheel-track switching structure can complete the switching of the stretcher track and the wheel feet up and down stairs, and can also solve the problem of transient gravity center of the stretcher when the steps of the last step and the first step are carried out;
4. the stretcher can keep horizontal when going upstairs and downstairs and avoid the overturning caused by the inclination of the gravity center through the matching of the support frame and the rotating joint.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic view of a portion of the stretcher of the present invention;
FIG. 3 is a schematic view of a portion of the structure of FIG. 2 according to the present invention;
FIG. 4 is a schematic view of a portion of a revolute joint according to the present invention;
FIG. 5 is a schematic view of a track transfer device according to the present invention;
FIG. 6 is a schematic view of the track mechanism of the present invention;
FIG. 7 is a schematic view of the stair climbing process of the present invention;
FIG. 8 is a schematic view of the last step of the present invention;
FIG. 9 is a schematic view of the wheel foot of the present invention;
FIG. 10 is a schematic view of the present invention showing the lifting and folding;
FIG. 11 is a schematic view of the inside construction of the track mechanism of the present invention;
the stretcher comprises a stretcher structure, 1, a calf stretcher plate, 2, a thigh stretcher plate, 3, a stretcher structure, 301, a calf stretcher frame, 302, a thigh stretcher frame, 303, a waist stretcher frame, 304, a back stretcher frame, 305, a back lifting support rod, 306, a first rotating hinge, 307, a first shaft end mounting platform, 308, a lead screw, 309, an optical axis, 310, a seated linear bearing, 311, a lead screw slider, 312, a second rotating hinge, 313, a rotating handle, 314, a second shaft end mounting platform, 315 and a stretcher frame support; 4. waist stretcher board, 5, folding guardrail, 6, back stretcher board, 7, sliding platform, 701, sliding platform, 702, supporting platform, 8, supporting frame, 9, supporting hinge, 10, first servo electric cylinder, 11, rotary joint, 1101, joint upper box body, 1102, rotary joint lower box body, 1103, stepped shaft, 1104, pinion, 1105, gearwheel, 12, crawler mechanism, 1201, walking part support, 1202, crawler, 1203, driving wheel, 1204, driving wheel transmission shaft, 1205, chain, 1206, driving wheel, 1207, driving wheel shaft, 1208, crawler combination board, 13, wheel-track conversion structure, 1301, wheel-foot support frame, 1302, wheel foot, 1303, first connecting rod, 1304, rocker, 1305, second connecting rod, 1306, crank, 14, second servo electric cylinder, 15, linear guide rail, 16, ball screw, 17, coupling, 18, first servo motor, 19, linear guide rail, 17, and second connecting rod, The device comprises a sliding block 20, a ball screw support 21, a second servo motor 22, a first worm gear reducer 23, a second worm gear reducer 24, a third servo motor 25 and a clutch.
Detailed Description
In order to make the technical content and the structural features of the present invention more comprehensible, embodiments accompanied with figures are described in detail below, without limiting the scope of the present invention. In the description of the present invention, the terms "front", "rear", "left", "right", "up", "down", and the like indicate positional relationships of orientations and are merely used to simplify the description, but do not indicate specific orientations that are necessary. The terms "first," "second," and the like are used merely to simplify the written description for distinguishing between similar features and not to imply a particular order.
The present invention will be described in further detail with reference to the following examples:
as shown in figure 1, the up-and-down stair stretcher comprises a stretcher structure 3, a calf stretcher plate 1, a thigh stretcher plate 2, a waist stretcher plate 4 and a back stretcher plate 6 which are sequentially fixed on the stretcher structure 3, folding guardrails 5 are arranged on two sides of the stretcher structure 3, a sliding platform 7 is arranged below the stretcher structure 3 in a sliding manner, an L-shaped support frame 8 is fixedly arranged below the sliding platform 7, one end of the support frame 8 is hinged with the cylinder body end of a first servo electric cylinder 10, the other end of the support frame 8 is hinged with the motor end of a second servo electric cylinder 14, the motor end of the first servo electric cylinder 10 is hinged with the rotary joint 11, the cylinder end of the second servo electric cylinder 14 is fixed with the rotary joint 11, the lower end of the rotary joint 11 is fixedly connected with a crawler 12, two wheel-track conversion structures 13 are symmetrically arranged on the inner side of the crawler 12 and the bottom of the rotary joint 11, and the two wheel-track conversion structures 13 are hinged.
As shown in fig. 2 to 3, the stretcher structure 3 includes a stretcher frame support 315, a waist stretcher frame 303 is fixedly mounted on the stretcher frame support 315, two ends of the waist stretcher frame 303 are respectively hinged and movably disposed on a thigh stretcher frame 302 and a back stretcher frame 304 on the stretcher frame support 315 through a first rotating hinge 306, the thigh stretcher frame 302 is hinged with a lower leg stretcher frame 301 through a first rotating hinge 306, a front edge of the lower leg stretcher frame 301 is fixedly connected with a second shaft end mounting platform 314 through a second rotating hinge 312, a rotating handle 313 is disposed on the second shaft end mounting platform 314, a first shaft end mounting platform 307 is fixedly disposed on the stretcher frame support 315 corresponding to a hinged position of the waist stretcher frame 303 and the back stretcher frame 304, a back lifting support rod 305 is hinged between the first shaft end mounting platform 307 and the back stretcher frame 304, two optical axes 309 are fixedly arranged between the first shaft end mounting platform 307 and the second shaft end mounting platform 314, a plurality of linear bearings with seats 310 are fixedly arranged on the stretcher frame support 315, and the optical axes 309 are respectively and fixedly connected with the first shaft end mounting platform 307 and the second shaft end mounting platform 314 after penetrating through the linear bearings with seats 310. A lead screw 308 is arranged between the two optical axes 309, one end of the lead screw 308 is fixedly connected with a rotating handle 313, the other end of the lead screw 308 is movably connected with the first axial end mounting platform 307, a lead screw sliding block 311 fixed on the stretcher frame support 315 is arranged on the lead screw 308, and the lead screw 308 and the lead screw sliding block 311 move relatively. The bottom of the stretcher frame support 315 is provided with two linear guide rails 15 in parallel, and the sliding platform 7 slides along the two linear guide rails 15.
As shown in fig. 4 to 5, the rotary joint 11 includes a joint upper case 1101, the upper portion of the joint upper case 1101 is hinged to a motor end of the first servo electric cylinder 10, large gears 1105 are fixedly disposed inside two sides of the joint upper case 1101, a rotary joint lower case 1102 is movably connected to the outside of the joint upper case 1101, the rotary joint lower case 1102 and the joint upper case 1101 rotate relatively, a second servo motor 21 is fixedly disposed on the rotary joint lower case 1102, the second servo motor 21 is connected to a first worm gear reducer 22, an output shaft of the first worm gear reducer 22 is a stepped shaft 1103, and both overhanging ends of the stepped shaft 1103 are provided with small gears 1104, and the small gears 1104 are engaged with the large gears 1105 to transmit power.
As shown in fig. 5, the track mechanism 12 includes two traveling part supports 1201, a track assembly plate 1208 is disposed between the two traveling part supports 1201, the lower box 1102 of the revolute joint is fixedly disposed on the track assembly plate 1208, the traveling part supports 1201 are provided with a driving wheel shaft 1204 and a driving wheel shaft 1207, one end of the driving wheel shaft 1204 is connected to the second worm gear reducer 23, one end of the second worm gear reducer 23 is connected to the third servo motor 24, the other end of the second worm gear reducer 23 is connected to the driving wheel 1203, the driving wheel 1203 transmits power to a driving wheel 1206 disposed on the driving wheel shaft 1207 through a chain 1205, and the driving wheel 1206 is engaged with the track 1202.
As shown in fig. 6, the wheel-track switching structure 13 includes a wheel-foot support frame 1301, a wheel foot 1302, a first link 1303, a rocker 1304, a second link 1305, a crank 1306, and a clutch 25, where the clutch 25 is fixedly connected to the second worm gear reducer 23, one end of the crank 1306 is rotatably connected to the clutch 25, the rocker 1304 is rotatably connected to the walking part support 1201, two ends of the second link 1305 are respectively hinged to the rocker 1304 and the crank 1306, the wheel-foot support frame 1301 is hinged to the hinge point of the rocker 1304 through the first link 1303 and the second link 1305, and the wheel foot 1302 is disposed at the bottom of the wheel-foot support frame 1301.
The present invention will be further described with reference to the following examples:
the invention has five movement modes, namely upstairs going, downstairs going, wheel-track switching, lifting folding and stretcher folding functions, and the concrete movement is as follows:
the first mode is as follows:
as shown in fig. 7 and 11, in preparation for operation, first, the two crawler mechanisms 12 are driven by two independent third servo motor drives 24 to drive the second worm gear reducer 23, the second worm gear reducer 23 drives the driving wheel 1203 via the driving wheel shaft 1204, the driving wheel 1203 transmits power to the driving wheel 1206 provided on the driving wheel shaft 1207 via the chain 1205, and the driving wheel 1206 is engaged with the crawler 1202 to move the crawler. Before going upstairs, the up-and-down stair type stretcher is driven by the crawler mechanism 12 to be opposite to the stairs.
The ascending mode is firstly driven by the crawler mechanism 12, certain climbing capacity is achieved due to the fact that a certain inclination angle exists in the front section of the crawler mechanism 12, the crawler mechanism 12 drives the ascending and descending stretcher to gradually climb up stairs, the stretcher can follow the ascending process due to the inclination angle of the stairs in the advancing process, the gravity center inclines backwards, the stretcher is not horizontal, in order to overcome the problem, in the ascending process, the second servo motor 21 can be used for driving the first worm gear reducer 22 to further drive the stepped shaft 1103 to drive the pinion 1104, the joint ascending box 1101 and the rotary joint descending box 1102 are driven to rotate relatively through meshing of the pinion 1104 and the bull gear 1105, and therefore the stretcher part is kept in a horizontal state.
The gravity center is adjusted, in the process of going upstairs, because the change of the angle of the vehicle body, for safe operation, the gravity center is kept in the range of the horizontal plane projection of the crawler belt at any time, the ball screw 16 is connected with the first servo motor 18 through the coupler 17, the first servo motor 18 drives the ball screw 16 to enable the sliding block 19 to move, the sliding block 19 is fixed on the supporting platform 702, the sliding table 701 and the linear guide rail 15 are arranged on the supporting platform 702 in a sliding connection mode, therefore, the stretcher slides relative to the sliding platform 7, and the gravity center position is adjusted.
As shown in fig. 8 and fig. 11, when the last step is taken, the third servo motor 24 drives the second worm gear reducer 23 to drive the crank-link mechanism composed of the crank 1306, the first link 1303 and the rocker 1304 to move, the crank-link mechanism converts the rotation motion of the crank 1306 into the swinging motion of the rocker 1304, the first link 1303 drives the second link 1305 to support the wheel-foot support 1301 to move downwards to contact with the platform of the staircase, so as to play a supporting role, prevent the center of gravity of the whole mechanism from changing when the last step is taken, as follows, the crawler 12 continues to drive the whole mechanism to move upwards, when a part of the crawler is suspended, the crawler 12 stops working, when the support-wheel-foot support 1301 senses the support force, the crawler 12 starts working again, and when the support force of the support-wheel-foot support 1301 disappears, the crawler stops after a certain time of the movement, the support-wheel-foot support 1301 moves downwards, until the support wheel foot support frame 1301 receives continuous support force along with the movement of the crawler 12, the crawler 12 stops working, the support wheel foot support frame 1301 supports the whole device, and at the moment, the whole mechanism stably runs to the middle platform of the stair.
Second, mode downstairs:
the downstairs mode differs from the upstairs mode in that: the process of going downstairs: should prevent the focus transient when first step down, track 12 continues to drive whole mechanism and gos forward when first step down, track 12 stops track work when partial track unsettled back, the holding power that the sufficient support frame 1301 of supporting wheel visited down, the probe stops down, track 12 begins to move a section distance, the sufficient support frame 1301 of supporting wheel visits the holding power down once more, the probe stops down, until track 12 moves, the sufficient support frame 1301 of supporting wheel feels continuous pressure, track 12 stop work, the sufficient support frame 1301 of supporting wheel supports whole device, whole mechanism smooth operation to stair inclined plane this moment.
Thirdly, a wheel-track switching mode:
as shown in fig. 9 and 11, in the staircase, for solving the turning problem by the transverse movement of the stretcher, the crawler 12 capable of driving the stretcher to move back and forth can be switched into the wheel foot 1302 capable of moving transversely through the wheel-track switching mode, when the stretcher runs to the middle platform of the staircase, the corresponding crank 1306 is synchronously driven to rotate by the two third servo motors 24, the crank-link mechanism converts the rotation motion of the crank 1306 into the swinging motion of the rocker 1304, the first link 1303 drives the second link 1305 to support the wheel foot support frame 1301 to move downwards, so that the wheel foot 1302 contacts the ground, and when the wheel foot support frame 1301 is at an angle of 30 degrees with the ground, the wheel-track switching is finished.
Fourthly, lifting and folding functions:
as shown in fig. 10, the ascending and descending stretcher can adjust its height and reduce its size by lifting and folding function, and is implemented by driving the first worm gear reducer 22 by the second servo motor 21 to drive the stepped shaft 1103 to drive the pinion 1104, driving the joint upper box 1101 and the rotary joint lower box 1102 to rotate relatively by the engagement of the pinion 1104 and the bull gear 1105, the first servo electric cylinder 10 working to extend the cylinder, the second servo electric cylinder 14 working to retract the cylinder, keeping the stretcher horizontal by the cooperation of the rotary joint 11, the first servo electric cylinder 10 and the second servo electric cylinder 14, the first servo motor 18 driving the ball screw 16 to move the slider 19, the slider 19 being fixed on the support platform 702, the support platform 702 being provided with a sliding table 701 slidably connected with the linear guide 15, thereby making the stretcher slide relative to the sliding platform 7, thereby adjusting the position of the gravity center, and keeping the gravity center of the stretcher and the patient in the track supporting surface all the time.
Fifthly, folding kinetic energy of the stretcher:
as shown in fig. 2, a waist stretcher frame 303 is fixedly mounted on the stretcher frame support 315, two ends of the waist stretcher frame 303 are respectively hinged and movably disposed on a thigh stretcher frame 302 and a back stretcher frame 304 on the stretcher frame support 315 through a first rotating hinge 306, the thigh stretcher frame 302 is hinged with a shank stretcher frame 301 through a first rotating hinge 306, a front edge of the shank stretcher frame 301 is fixedly connected with a second shaft end mounting platform 314 through a second rotating hinge 312, a rotating handle 313 is disposed on the second shaft end mounting platform 314, a first shaft end mounting platform 307 is fixedly disposed on the stretcher frame support 315 corresponding to a hinged position of the waist stretcher frame 303 and the back stretcher frame 304, a back supporting rod 305 is hinged between the first shaft end mounting platform 307 and the back stretcher frame 304, two optical axes 309 are fixedly disposed between the first shaft end mounting platform 307 and the second shaft end mounting platform 314, a plurality of linear bearings 310 with seats are fixedly arranged on the stretcher frame support 315, and the optical axis 309 penetrates through the linear bearings 310 with seats and then is respectively and fixedly connected with the first shaft end mounting platform 307 and the second shaft end mounting platform 314. A lead screw 308 is arranged between the two optical axes 309, one end of the lead screw 308 is fixedly connected with a rotating handle 313, the other end of the lead screw 308 is movably connected with a first axial end mounting platform 307, a lead screw sliding block 311 fixed on a stretcher frame support 315 is arranged on the lead screw 308, the lead screw 308 and the lead screw sliding block 311 move relatively, and the lead screw 308 pushes the first axial end mounting platform 307 and a back supporting rod 305 to move, so that the folding function of the stretcher for bending legs and lifting the back is realized.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and those skilled in the art should make various changes and modifications to the technical solution of the present invention without departing from the spirit of the present invention, and all such changes and modifications should fall within the protection scope defined by the claims of the present invention.
Claims (8)
1. The utility model provides an upstairs or downstairs formula stretcher which characterized in that: comprises a stretcher structure (3), a calf stretcher plate (1), a thigh stretcher plate (2), a waist stretcher plate (4) and a back stretcher plate (6) which are sequentially fixed on the stretcher structure (3), wherein folding guardrails (5) are arranged on two sides of the stretcher structure (3), a sliding platform (7) is arranged below the stretcher structure (3) in a sliding manner, an L-shaped supporting frame (8) is fixedly arranged below the sliding platform (7), one end of the supporting frame (8) is hinged with a supporting hinge (9), the other end of the supporting frame is hinged with a motor end of a second servo electric cylinder (14), the supporting hinge (9) is fixed with a cylinder body end of a first servo electric cylinder (10), the motor end of the first servo electric cylinder (10) is hinged with a rotary joint (11), the cylinder body end of the second servo electric cylinder (14) is fixed with the rotary joint (11), the lower end of the rotary joint (11) is fixedly connected with a crawler mechanism (12), two wheel-track conversion structures (13) are symmetrically arranged on the inner side of the crawler mechanism (12) and the bottom of the rotary joint (11), and the two wheel-track conversion structures (13) are hinged.
2. The upstairs and downstairs stretcher of claim 1, wherein: the stretcher structure (3) comprises a stretcher frame support (315), a waist stretcher frame (303) is fixedly mounted on the stretcher frame support (315), the two ends of the waist stretcher frame (303) are respectively hinged and movably arranged on a thigh stretcher frame (302) and a back stretcher frame (304) on the stretcher frame support (315) through first rotating hinges (306), the thigh stretcher frame (302) is hinged with a shank stretcher frame (301) through the first rotating hinges (306), the front edge of the shank stretcher frame (301) is fixedly connected with a second shaft end mounting platform (314) through a second rotating hinge (312), a rotating handle (313) is arranged on the second shaft end mounting platform (314), a first shaft end mounting platform (307) is fixedly arranged at the hinged position of the corresponding waist stretcher frame (303) and the back stretcher frame (304) on the stretcher frame support (315), articulated between first axle end mounting platform (307) and back stretcher frame (304) is provided with back bracing piece (305), fixed two optical axis (309) that are provided with between first axle end mounting platform (307) and second axle end mounting platform (314), be provided with one end fixed connection twist grip (313), the first axle end mounting platform of other end swing joint (307) of lead screw (308) and lead screw (308) in the middle of two optical axis (309), be provided with lead screw slider (311) and lead screw (308) and lead screw slider (311) relative motion on being fixed in stretcher frame support (315) on lead screw (308).
3. The upstairs and downstairs stretcher of claim 2, wherein: the stretcher frame support (315) is fixedly provided with a plurality of linear bearings with seats (310), and the optical axis (309) penetrates through the linear bearings with seats (310) and then is respectively fixedly connected with a first axial end mounting platform (307) and a second axial end mounting platform (314).
4. The upstairs and downstairs stretcher of claim 2, wherein: the bottom parallel arrangement of stretcher frame support (315) has two linear guide (15), sliding platform (7) slide along two linear guide (15).
5. The upstairs and downstairs stretcher of claim 4, wherein: sliding platform (7) are including supporting platform (702), the four corners of supporting platform (702) is provided with four slip tables (701) and slip table (701) and linear guide (15) sliding fit, the top of supporting platform (702) is provided with ball (16) and passes fixed slider (19) that set up in supporting platform (702) top, the fixed two ball support (20) that are provided with in bottom that stretcher frame supported (315), the one end of ball (16) is fixed to be set up on one ball support (20), the other end passes behind another ball support (20) and is connected with shaft coupling (17), first servo motor (18) is connected in shaft coupling (17).
6. The upstairs and downstairs stretcher of claim 1, wherein: the rotary joint (11) comprises a joint upper box body (1101), a large gear (1105) is fixedly arranged on the inner portions of two sides of the joint upper box body (1101) and is hinged to a motor end of a first servo electric cylinder (10), a rotary joint lower box body (1102) is movably connected to the outer portion of the joint upper box body (1101), the rotary joint lower box body (1102) and the rotary joint lower box body (1102) rotate relative to the joint upper box body (1101), a second servo motor (21) is fixedly arranged on the rotary joint lower box body (1102), the second servo motor (21) is connected with a first worm gear reducer (22), an output shaft of the first worm gear reducer (22) is provided with a small gear (1104) at two extending ends of a stepped shaft (1103) and two extending ends of the stepped shaft (1103), and the small gear (1104) is meshed with the large gear (1105) to transmit power.
7. The upstairs and downstairs stretcher of claim 6, wherein: the crawler mechanism (12) comprises two walking part supports (1201), a crawler combination plate (1208) is arranged between the two walking part supports (1201), a lower box body (1102) of the rotary joint is fixedly arranged on the crawler combination plate (1208), the walking part supports (1201) are provided with a driving wheel shaft (1204) and a driving wheel shaft (1207), one end of the driving wheel shaft (1204) is connected with a second worm and gear reducer (23), one end of the second worm and gear reducer (23) is connected with a third servo motor (24), the other end of the second worm and gear reducer is connected with a driving wheel (1203), the driving wheel (1203) transmits power to a driving wheel (1206) arranged on the driving wheel shaft (1207) through a chain (1205), and the driving wheel (1206) is meshed with the crawler (1202).
8. The upstairs and downstairs stretcher of claim 7, wherein: the wheel-track switching structure (13) comprises a wheel-foot supporting frame (1301), wheel feet (1302), a first connecting rod (1303), a rocker (1304), a second connecting rod (1305), a crank (1306) and a clutch (25), wherein the clutch (25) is fixedly connected with a second worm gear reducer (23), one end of the crank (1306) is rotatably connected with the clutch (25), the rocker (1304) is rotatably connected with a walking part support (1201), two ends of the second connecting rod (1305) are respectively hinged with the rocker (1304) and the crank (1306), the wheel-foot supporting frame (1301) is hinged with the hinged point of the rocker (1304) through the first connecting rod (1303) and the second connecting rod (1305), and the bottom of the wheel-foot supporting frame (1301) is provided with the wheel feet (1302).
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| CN202010859448.4A CN111938931B (en) | 2020-08-24 | 2020-08-24 | Up-down stair type stretcher |
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| CN111938931B CN111938931B (en) | 2022-04-01 |
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| CN113558880A (en) * | 2021-07-28 | 2021-10-29 | 江苏仁和医疗器械有限公司 | Electronic manned stair stretcher convenient to adjust wheel base |
| CN113696945A (en) * | 2021-08-11 | 2021-11-26 | 中船澄西船舶修造有限公司 | Marine threshold transfer car (buggy) of crossing |
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| CN111938931B (en) | 2022-04-01 |
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