Automatic lifting limiting device for ambulance stretcher

Abstract

The utility model discloses an ambulance stretcher automatic lifting limiting device which comprises a bottom frame, a ball wheel assembly with a universal ball is arranged on the bottom face of the bottom frame, driving blocks in front-section electric rails of two side beams of the bottom frame are hinged to the bottom ends of outer supporting arms, the top ends of the outer supporting arms are hinged to the tail ends of corresponding side beams of a top frame, and the rear ends of the two side beams of the bottom frame are hinged to the bottom ends of inner supporting arms. The centers of the inner support arm and the outer support arm on the same side are hinged, a convex block assembly is arranged on the outer side face of the front section, exceeding the bottom frame, of the top frame, the convex block assembly is matched with a groove in the side wall of an ambulance carriage, and a bed body assembly is arranged on the top face of the top frame; the top frame of the device can be fixed in the carriage through the convex block assembly, the inner supporting arm and the outer supporting arm are driven to deform through the electric rail, the bottom frame is driven to move upwards to be attached to the top frame, and therefore the universal ball ascends to the height of the bottom face of the carriage from the ground, automatic lifting and rapid getting-on of the stretcher are achieved, and the advantages of being convenient and efficient are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of stretcher equipment, in particular to an automatic lifting and limiting device for an ambulance stretcher. Background Art

[0002] A stretcher is a tool used to transport the wounded and sick in ambulances, hospitals, battlefields, and gymnasiums. It is mostly composed of a high-quality aluminum alloy frame and a foam cushion, which is convenient for the wounded and sick to lie on it. It can be divided into two types: manual lifting and roller pushing. Since the stretcher with rollers is more labor-saving to transport the wounded and sick and can be pushed by one person, it is widely used in medical rescue to save labor costs. However, this type of stretcher is usually bulky due to the influence of the roller base. It is very difficult to lift it and the stretcher flat onto the ambulance. During this process, the wounded and sick are prone to rolling off the stretcher due to the tilt of the lifting angle, which aggravates the injury; in addition, the universal wheels used in the traditional roller base are prone to rust, uncoordinated four-wheel steering, etc., which makes it difficult to push the stretcher during use. A new type of stretcher device is needed to solve the above problems. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes an automatic lifting and limiting device for an ambulance stretcher, comprising a bottom frame, a ball wheel assembly with a universal ball is arranged on the bottom surface of the bottom frame, a driving block in an electric track in the front section of the beams on both sides of the bottom frame is hinged to the bottom end of the outer support arm, the top end of the outer support arm is hinged to the tail end of the corresponding side beam of the top frame, the rear end of the beams on both sides of the bottom frame is hinged to the bottom end of the inner support arm, the top end of the inner support arm is hinged to a slider in a sliding track in the middle section of the side beam of the top frame, the inner and outer support arms on the same side are centrally hinged, a convex block assembly is arranged on the outer side surface of the front section of the top frame beyond the bottom frame, the convex block assembly cooperates with the groove of the side wall of the ambulance compartment, and a bed assembly is arranged on the top surface of the top frame.

[0004] Furthermore, the electric track includes a driving motor, which is installed on the crossbeam at the front end of the bottom frame. The inner cavity of the crossbeam is rotatably connected to the transmission shaft, the gear on the transmission shaft body is meshed with the gear at the output end of the driving motor, the gears at both ends of the transmission shaft are meshed with the gears at the end of the threaded shaft on both sides, the threaded shaft is rotatably connected to the track groove opened on the inner side surface of the front section of the side beam of the bottom frame, the threaded shaft is threadedly connected to the threaded through hole of the driving block, and the driving block is slidably connected to the track groove.

[0005] Furthermore, the bump assembly includes a bump, which is slidably connected in a block groove opened on the outer side surface of the front section of the top frame side beam, a positioning sensor is embedded in the front end of the bump, the center of the back side of the bump is rotatably connected to an adjusting screw, the front end of the adjusting screw is screwed out from a threaded seat on the inner side surface of the front section of the top frame side beam, a handwheel is provided at the front end of the adjusting screw, and the slots on both sides of the back side of the bump are slidably connected to the positioning rod in the block groove.

[0006] Furthermore, the ball wheel assembly includes a movable block, which is connected to a mounting block on the bottom surface of the bottom frame by bolts, and grooves at the mating surfaces of the mounting block and the movable block are assembled to form a ball groove with an opening facing downward, and the universal ball is embedded in the ball groove.

[0007] Furthermore, the bed assembly includes a bed body, the bottom surface of which is laid on the support beam of the top frame through elastic pads, and a plurality of support columns are provided on the bottom surfaces of both sides of the bed body. The connecting rod at the center of the bottom surface of the support column is inserted into the sleeve column provided on the top surface of the side beam of the top frame, and the outer walls of the two columns are covered with elastic sleeves.

[0008] Furthermore, the sliding track includes a sliding groove opened on the inner side of the middle section of the top frame side beam, the sliding groove has a built-in sliding rod, the sliding rod is slidably connected to the sliding block through hole, and the sliding track is located directly above the corresponding electric track.

[0009] The beneficial effects of the utility model are as follows: the top frame of the utility model can be fixed in the carriage by a retractable convex block assembly, and then the inner and outer support arms are driven to deform by an electric track, driving the bottom frame to move upward and fit with the top frame, so that the universal ball rises from the ground to the height of the bottom surface of the carriage, realizing the automatic lifting and rapid loading of the stretcher. The universal ball in the device replaces the universal wheel of the traditional roller base, making the stretcher smoother when turning, and has the characteristics of convenience, efficiency and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a front view structural schematic diagram of the utility model;

[0011] Figure 2 It is a side view structural schematic diagram of the utility model when it is expanded;

[0012] Figure 3 for Figure 2 A partial enlarged view of the middle A area;

[0013] Figure 4 It is a side view structural schematic diagram of the utility model when folded;

[0014] Figure 5 It is a schematic diagram of the top structure of the utility model.

[0015] The accompanying drawings are marked as follows: 1. bottom frame; 101. track groove; 102. mounting block; 2. universal ball; 3. drive block; 4. outer support arm; 5. top frame; 501. block groove; 502. positioning rod; 503. support beam; 504. sleeve column; 505. sliding groove; 6. inner support arm; 7. slider; 8. drive motor; 9. transmission shaft; 10. threaded shaft; 11. bump; 12. positioning sensor; 13. adjusting screw; 1301. hand wheel; 14. movable block; 15. bed; 1501. support column; 16. elastic sleeve; 17. slide rod; 18. spring pad. DETAILED DESCRIPTION

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] The utility model is further described below in conjunction with the accompanying drawings:

[0019] like Figures 1 to 5 As shown, an automatic lifting and limiting device for an ambulance stretcher comprises a bottom frame 1, a ball wheel assembly with a universal ball 2 is provided on the bottom surface of the bottom frame 1, and the ball wheel assembly comprises a movable block 14, the movable block 14 is connected to a mounting block 102 on the bottom surface of the bottom frame 1 by bolts, and the mounting block 102 and the grooves at the contact surface of the movable block 14 are spliced ​​to form a ball groove with an opening facing downward, and the universal ball 2 is embedded in the ball groove. The driving block 3 in the electric track of the front section of the two side beams of the bottom frame 1 is hinged to the bottom end of the outer support arm 4, and the top end of the outer support arm 4 is hinged to the top frame 5 corresponding to the rear end of the side beam, and the rear end of the two side beams of the bottom frame 1 is hinged to the bottom end of the inner support arm 6, and the top end of the inner support arm 6 is hinged to the slider 7 in the middle section sliding track of the top frame 5 corresponding to the side beam, and the inner and outer support arms on the same side are centrally hinged, and a reinforcing connecting rod is provided between the corresponding end hinge points and the central hinge points of the inner and outer support arms on both sides.

[0020] In this embodiment, the electric track includes a drive motor 8, which is installed on the crossbeam at the front end of the bottom frame 1. The inner cavity of the crossbeam is rotatably connected to the transmission shaft 9. The gear on the transmission shaft 9 is meshed with the gear at the output end of the drive motor 8. The gears at both ends of the transmission shaft 9 are meshed with the gears at the ends of the threaded shafts 10 on both sides. The threaded shafts 10 are rotatably connected in a track groove 101 opened on the inner side surface of the front section of the side beam of the bottom frame 1. The threaded shaft 10 is threadedly connected to the threaded through hole of the drive block 3, and the drive block 3 is slidably connected to the track groove 101; the sliding track includes a sliding groove 505 opened on the inner side surface of the middle section of the side beam of the top frame 5, and the sliding groove 505 has a built-in sliding rod 17. The sliding rod 17 is slidably connected to the through hole of the slider 7, and the sliding track is located directly above the corresponding electric track.

[0021] In this embodiment, the top frame 5 is provided with a protrusion assembly on the outer side of the front section beyond the bottom frame 1, and the protrusion assembly includes a protrusion 11, which is slidably connected to a block groove 501 provided on the outer side of the front section of the side beam of the top frame 5, and a positioning sensor 12 is embedded in the front end of the protrusion 11. The center of the back of the protrusion 11 is rotatably connected to an adjusting screw 13, and the head end of the adjusting screw 13 is screwed out from the threaded seat on the inner side of the front section of the side beam of the top frame 5. A hand wheel 1301 is provided at the head end of the adjusting screw 13, and the slots on both sides of the back of the protrusion 11 are slidably connected to the positioning rod 502 in the block groove 501. The positioning sensor 12 can sense the groove of the side wall of the ambulance compartment, and the protrusion 11 can be stuck in the groove to fix the top frame 5 on the compartment, so as to facilitate the upward movement of the bottom frame 1. A bed assembly is provided on the top surface of the top frame 5, and the bed assembly includes a bed 15. The bottom surface of the bed 15 is laid on the support beam 503 of the top frame 5 through a spring pad 18. A plurality of support columns 1501 are provided on the bottom surfaces of both sides of the bed 15. The connecting rod at the center of the bottom surface of the support column 1501 is inserted into the sleeve column 504 provided on the top surface of the side beam of the top frame 5, and the outer walls of the two columns are sleeved with elastic sleeves 16.

[0022] The working principle of the utility model is as follows:

[0023] Push the stretcher carrying the patient to the door of the ambulance, start the drive motor 8 to drive the outer support arm 4 to move along the track groove 101, so as to adjust the height of the top frame 5, so that the positioning sensor 12 can identify the position of the groove on the side wall of the carriage, and then push the front section of the top frame 5 into the carriage. At this time, the protrusion 11 is inserted into the groove to fix the top frame 5 in the vertical direction, and start the drive motor 8 again. The inner and outer support arms are folded to drive the bottom frame 1 to move upward, so that the bottom height of the universal ball 2 rises to be flush with the bottom surface of the carriage, and then the stretcher is completely pushed into the carriage to complete the loading. When it is necessary to adjust the height of the stretcher in the carriage, turn the hand wheel 1301 to make the protrusion 11 disengage from the groove and shrink into the block groove 501, start the drive motor 8, and adjust the top frame 5 to the appropriate height.

[0024] The top frame 5 of the utility model can be fixed in the carriage by means of a convex block assembly, and then the inner and outer supporting arms are driven to deform by an electric track, thereby driving the bottom frame 1 to move upward and fit with the top frame 5, so that the universal ball 2 rises from the ground to the height of the bottom surface of the carriage, realizing automatic lifting and rapid loading of the stretcher, which is convenient and efficient.

[0025] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. An automatic lifting and limiting device for an ambulance stretcher, comprising a bottom frame (1), characterized in that: The bottom surface of the bottom frame (1) is provided with a ball wheel assembly with a universal ball (2); a driving block (3) in the electric track of the front section of the two side beams of the bottom frame (1) is hinged to the bottom end of the outer support arm (4); the top end of the outer support arm (4) is hinged to the rear end of the corresponding side beam of the top frame (5); the rear end of the two side beams of the bottom frame (1) is hinged to the bottom end of the inner support arm (6); the top end of the inner support arm (6) is hinged to the slider (7) in the sliding track of the middle section of the corresponding side beam of the top frame (5); the inner and outer support arms on the same side are hinged at the center; a convex block assembly is provided on the outer side surface of the front section of the top frame (5) beyond the bottom frame (1); the convex block assembly cooperates with a groove of the side wall of the ambulance compartment; and a bed assembly is provided on the top surface of the top frame (5).

2. The automatic lifting and limiting device for an ambulance stretcher according to claim 1, characterized in that: The electric track comprises a driving motor (8), which is mounted on a crossbeam at the front end of a bottom frame (1). The inner cavity of the crossbeam is rotatably connected to a transmission shaft (9), a gear on the shaft body of the transmission shaft (9) meshes with a gear on the output end of the driving motor (8), gears at both ends of the transmission shaft (9) mesh with gears at the ends of a threaded shaft (10) on both sides, the threaded shaft (10) is rotatably connected to a track groove (101) provided on the inner side surface of the front section of the side beam of the bottom frame (1), the threaded shaft (10) is threadedly connected to a threaded through hole of a driving block (3), and the driving block (3) is slidably connected to the track groove (101).

3. The automatic lifting and limiting device for an ambulance stretcher according to claim 1, characterized in that: The convex block assembly comprises a convex block (11), the convex block (11) is slidably connected in a block groove (501) provided on the outer side surface of the front section of the side beam of the top frame (5), a positioning sensor (12) is embedded in the front end of the convex block (11), the back center of the convex block (11) is rotatably connected to an adjusting screw rod (13), the front end of the adjusting screw rod (13) is screwed through a threaded seat on the inner side surface of the front section of the side beam of the top frame (5), a hand wheel (1301) is provided at the front end of the adjusting screw rod (13), and slot holes on both sides of the back of the convex block (11) are slidably connected to the positioning rod (502) in the block groove (501).

4. The automatic lifting and limiting device for an ambulance stretcher according to claim 1, characterized in that: The ball wheel assembly comprises a movable block (14), the movable block (14) being connected to a mounting block (102) on the bottom surface of the bottom frame (1) via bolts, the mounting block (102) and the grooves at the mating surfaces of the movable block (14) being assembled to form a ball groove with an opening facing downward, and the universal ball (2) being embedded in the ball groove.

5. The automatic lifting and limiting device for an ambulance stretcher according to claim 1, characterized in that: The bed assembly comprises a bed (15), the bottom surface of the bed (15) being laid on a support beam (503) of a top frame (5) via a spring pad (18), a plurality of support columns (1501) being provided on the bottom surfaces of both sides of the bed (15), a connecting rod at the center of the bottom surface of the support column (1501) being inserted into a sleeve column (504) provided on the top surface of the side beam of the top frame (5), and the outer side walls of the two columns being sleeved with elastic sleeves (16).

6. The automatic lifting and limiting device for an ambulance stretcher according to claim 1, characterized in that: The sliding track comprises a sliding groove (505) formed on the inner side surface of the middle section of the side beam of the top frame (5), the sliding groove (505) having a built-in sliding rod (17), the sliding rod (17) being slidably connected to a through hole of a sliding block (7), and the sliding track is located directly above the corresponding electric track.

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