Movable sickbed convenient to go in and out of shelter hospital

Abstract

The movable sickbed comprises a bed frame used for supporting a bed board and a transverse connecting frame used for supporting multiple sets of universal wheels, the multiple sets of universal wheels comprise front wheels and rear wheels, and the bed frame is provided with a crossing structure for driving the front wheels and the rear wheels on the two horizontal sides of the bed frame to sequentially cross obstacles. The interval span structure comprises a guide column fixedly connected to the bed frame, a plurality of sets of auxiliary wheels used for temporarily supporting the bed frame and the universal wheels are arranged below the guide column, a weight stabilizing assembly driving the auxiliary wheels to freely move in the vertical direction in a rectangular track is arranged on the bed frame, and the two horizontal sides, corresponding to the auxiliary wheels, of the bed frame are each provided with a set of swing span assembly. By arranging the interval crossing structure, the front wheels and the rear wheels can be driven to sequentially cross the threshold, through cooperation of autonomous adjustment and the auxiliary wheels, stable transition of the sickbed when the sickbed passes through the threshold is achieved, the heavy operation that the sickbed needs to be lifted in a traditional method is avoided, and therefore the patient transferring efficiency and safety are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile beds, and in particular to a mobile bed that is convenient for entering and exiting a square cabin hospital. Background Art

[0002] A Fangcang shelter hospital is a temporary medical facility consisting of modular or mobile medical units. It is usually quickly built during public health emergencies or natural disasters to treat a large number of patients with mild symptoms. Fangcang shelter hospitals have the characteristics of flexible layout and rapid deployment, and can provide basic diagnosis, treatment and nursing services to patients in a short period of time.

[0003] Chinese patent (Announcement No.: CN115998540A), the solution specifically includes a bed body, a plurality of wheel groups at the bottom of the bed body, each wheel group includes a plurality of wheels, and a switching device is provided on the bed body, the switching device is used to change the position of each wheel group to switch the wheel group in contact with the ground. This mobile bed is provided with a plurality of wheel groups, and the wheel group in contact with the ground can be switched by the switching device. Therefore, when entering different areas during use, the corresponding wheel group can be switched to avoid bringing microorganisms and dust on the ground into other areas. Since cross-contamination of the ground, a larger pollution source, is avoided, this mobile bed can meet the disinfection requirements of most areas, so it can be used directly in most areas. There is no need to change beds during movement in these areas, which can effectively reduce the number of bed changes for patients, and correspondingly can effectively reduce the work intensity and burden of medical staff.

[0004] Since the structure of the square cabin hospitals is mostly container or tent-style design, the door of the square cabin needs to be installed with a door frame, and the bottom of the door frame has a certain height, so there is a certain height difference or threshold at the entrance. These factors make it easy for ordinary beds to encounter pushing resistance when entering and exiting the square cabin hospital, increasing the difficulty of medical care.

[0005] The above patent can switch the wheel group when in use to reduce the number of times of changing people and beds. However, when transferring patients by bed, due to the presence of thresholds in the square cabin hospital, the existence of the thresholds will hinder the transfer process of the bed, and the process of manually lifting one end of the bed to allow the front and rear wheels of the bed to pass through the threshold in turn is relatively time-consuming and laborious. Moreover, when patients need to be transferred frequently, their efficiency in entering and exiting the square cabin hospital is low. Therefore, a mobile bed that is convenient for entering and exiting the square cabin hospital is proposed. Summary of the invention

[0006] The purpose of the present invention is to provide a mobile bed that is convenient for entering and exiting a square cabin hospital, which has the advantages of improving the efficiency and safety of patient transfer and solving the problem of low efficiency in entering and exiting a square cabin hospital due to frequent transfer of patients.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solutions: a mobile bed that is convenient for entering and exiting a square cabin hospital, comprising a bed frame for supporting a bed board and a cross-joint frame for supporting a plurality of sets of universal wheels, the plurality of sets of universal wheels comprising front wheels and rear wheels, the bed frame being provided with a span structure for driving the front wheels and the rear wheels on both sides of the bed frame to sequentially cross obstacles; The span structure includes a guide column fixedly connected to the bed frame, a plurality of auxiliary wheels for temporarily supporting the bed frame and universal wheels are arranged below the guide column, and a stabilizing component for driving the auxiliary wheels to freely move in a rectangular track in a vertical direction is arranged on the bed frame; The bed frame is provided with a set of swing span components on both horizontal sides corresponding to the auxiliary wheels, and the two sets of swing span components operate alternately and drive the front wheels and the rear wheels to cross obstacles respectively; In the initial state, the horizontal position of the auxiliary wheel is biased toward the front wheel side, and the bed frame drives the two sets of swing span components and the stabilizing components to run in sequence.

[0008] Preferably, the two groups of swing span assemblies each include a base frame fixedly connected to the bed frame, a positioning seat is provided on the base frame, and a transverse slide groove is provided on the base frame for the positioning seat to slide and connect in the horizontal direction; The positioning seat is provided with a vertical rod which can freely move in a triangular track in the vertical direction, and the positioning seat is provided with a rectangular through groove for the vertical rod to slide and connect in the vertical direction.

[0009] Preferably, the swing span assembly further comprises a connecting rod freely rotating in the vertical direction, the connecting rod is fixedly rotated on the bed frame, a side gear is fixedly rotated on the connecting rod, the side gear is meshedly connected with an inner gear ring, and the inner gear ring is fixedly connected to the base frame; The vertical rod is fixedly rotated on the side gear, and one end of the vertical rod away from the side gear is fixedly connected to the horizontal bracket.

[0010] Preferably, a worm is provided on the bed frame for fixed axis rotation, the worm is meshingly connected with a worm wheel, one end of the connecting rod away from the side gear is coaxially fixed with the worm wheel, and the worm and the worm wheel both rotate on the bed frame for fixed axis rotation.

[0011] Preferably, the stabilizing component comprises a horizontal guide cylinder slidably sleeved on the guide column, the horizontal guide cylinder is fixedly connected to a limit column at one end facing the auxiliary wheel, a limit seat is slidably sleeved on the limit column, a longitudinal swing seat is provided on the limit seat and the longitudinal swing seat is fixedly rotated on the limit seat; The limit seat is fixedly connected with a lower extension frame, and multiple sets of auxiliary wheels are all fixedly rotated on the lower extension frame; The guide column comprises a plurality of groups of integrally formed protrusions, and one end of the limit column away from the horizontal guide cylinder is fixedly connected with a circular ring.

[0012] Preferably, the bed frame is provided with a hollow swing seat, and the hollow swing seat is fixedly rotated on the bed frame, the hollow swing seat is provided with a yielding column, and the yielding column is fixedly connected to the longitudinal swing seat, and a circular hole is opened on the hollow swing seat for the yielding column to slide and observe; The outer ring sleeve of the yielding column is provided with a pressure spring, and the two ends of the pressure spring are respectively fixedly connected to the longitudinal swing seat and the hollow swing seat.

[0013] Preferably, the self-adjusting component comprises a pointed-angle swing rod coaxially fixed with the hollow swing seat, a stop plate is provided on the side of the pointed-angle swing rod away from the hollow swing seat, and the stop plate is fixedly connected to the bed frame; The blocking disk is provided with a plurality of groups of trapezoidal clamping blocks arranged in a circular array, and the blocking disk is provided with a receiving groove for sliding connection of the trapezoidal clamping blocks, a reset spring is provided in the receiving groove, and two ends of the reset spring are respectively fixedly connected to the blocking disk and the trapezoidal clamping blocks; The bed frame is provided with a coaxial disc coaxial with the blocking disc, and the coaxial disc is provided with a group of clamping grooves corresponding to the positions of the trapezoidal clamping blocks; The pointed-angle swing rod is provided with a tension spring, and the two ends of the tension spring are respectively hung on the homonymous disk and the pointed-angle swing rod.

[0014] Preferably, a V-shaped support plate is fixedly connected to the bed frame, a co-ordination plate is fixedly rotated on the V-shaped support plate, and a sector gear is coaxially fixed on the co-ordination plate, and the sector gear is meshingly connected with two sets of driven gears; The two groups of driven gears are respectively connected to the worm gears in the two groups of swing span assemblies.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention can drive the front wheels and the rear wheels to cross the threshold in sequence by setting an inter-span structure. Through autonomous adjustment and the cooperation of auxiliary wheels, a smooth transition of the bed when passing through the threshold is achieved, avoiding the heavy operation of lifting the bed in the traditional method, thereby improving the efficiency and safety of patient transfer.

[0016] 2. The present invention provides a swing-over assembly. When the universal wheel contacts the threshold and successfully crosses over, the horizontal movement distance of the bed frame can be used as a visual prompt, which is convenient for medical staff to grasp the crossing state, thereby ensuring the accuracy and smoothness of the operation.

[0017] 3. The present invention provides a stabilizing component. When crossing the threshold, the stabilizing component drives the auxiliary wheels and the universal wheels to contact the ground synchronously, providing additional support for the bed frame, ensuring that the bed always remains in a relatively horizontal state when the front wheels or the rear wheels cross the threshold, avoiding the risk of the patient slipping due to the shaking of the bed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the components where the guide column of the present invention is located; Figure 3 This is a schematic diagram of the components where the horizontal bracket of the present invention is located; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the components where the limit seat of the present invention is located; Figure 6 This is a schematic diagram of the components where the co-location disk of the present invention is located; Figure 7 This is a schematic diagram of the parts where the pointed-angle swing rod of the present invention is located; Figure 8 For the present invention Figure 7 Enlarged view of point B in the middle; Fig. 9 It is a schematic diagram of the components where the sector gear of the present invention is located; Fig.10 The figure is a schematic diagram of the motion trajectory of the universal wheel of the present invention when crossing the threshold.

[0019] In the figure: 1. bed frame; 2. universal wheel; 3. guide column; 301. raised part; 4. horizontal guide cylinder; 5. limit column; 6. limit seat; 7. longitudinal swing seat; 8. yield column; 9. pressure spring; 10. hollow swing seat; 11. lower extension frame; 12. auxiliary wheel; 13. base frame; 14. worm; 15. worm wheel; 16. connecting rod; 17. side gear; 18. inner ring gear; 19. vertical rod; 20. positioning seat; 21. horizontal slide groove; 22. horizontal frame; 23. blocking plate; 24. same position plate; 25. pointed rocker; 26. trapezoidal clamping block; 27. clamping groove; 28. accommodating groove; 29. ​​reset spring; 30. tension spring; 31. sector gear; 32. driven gear; 33. V-shaped support plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 10 The present invention provides a technical solution: a mobile bed that is convenient for entering and exiting a square cabin hospital, comprising a bed frame 1 for supporting a bed board and a cross-joint frame 22 for supporting a plurality of sets of universal wheels 2, wherein the plurality of sets of universal wheels 2 include front wheels and rear wheels, and the bed frame 1 is provided with a span structure for driving the front wheels and the rear wheels on both sides of the bed frame 1 to sequentially cross obstacles; The inter-span structure includes a guide column 3 fixedly connected to the bed frame 1, and a plurality of auxiliary wheels 12 for temporarily supporting the bed frame 1 and the universal wheel 2 are arranged below the guide column 3. The bed frame 1 is provided with a stabilizing component for driving the auxiliary wheels 12 to freely move in a rectangular track in the vertical direction; The bed frame 1 is provided with a set of swing span components on both horizontal sides corresponding to the auxiliary wheels 12, and the two sets of swing span components operate alternately and drive the front wheels and the rear wheels to cross obstacles respectively; In the initial state, the auxiliary wheel 12 is horizontally positioned toward the front wheel side, and is a self-adjusting component on the bed frame 1 that drives two sets of swing span components and stabilizing components to operate in sequence.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, when the patient is transported by bed and is blocked by the threshold of the square cabin hospital, two sets of swing span components are used to drive the front wheels and the rear wheels on both sides of the bed frame 1 to cross the threshold in turn, so that the bed can pass the threshold position smoothly.

[0023] At the same time, in order to ensure the stability of the bed, in actual use, the stabilizing component drives the auxiliary wheel 12 and the universal wheel 2 to be at the same height and in contact with the ground, thereby ensuring the stability of the bed frame 1. The bed frame 1 is provided with two sets of swing span components that drive the front wheel and the rear wheel to cross the threshold. The one that drives the front wheel to run is called the front swing span component, and the one that drives the rear wheel to run is called the rear swing span component. Since the auxiliary wheel 12 is closer to the front wheel side relative to the rear wheel in the initial state, and under the drive of the self-adjusting component, the front swing span component runs, thereby enabling the front wheel to cross the threshold.

[0024] Furthermore, after the front wheels go over the threshold, the front wheels return to their initial height, that is, they are in contact with the ground again. After the front wheels go over the threshold, the auxiliary wheels 12 and the rear wheels can jointly support the bed frame 1 and the bed board, thereby ensuring the stability of the bed frame 1. Subsequently, driven by the self-adjusting component, the auxiliary wheels 12 can move in the horizontal direction and move upward after being at the end position of the travel close to the rear wheels.

[0025] After the auxiliary wheels 12 move upward, their own height is raised, and by pushing the hospital bed, multiple sets of auxiliary wheels 12 can pass through the threshold position smoothly, and the rear wheels can approach or abut the threshold. At the same time, the self-adjusting component drives the stabilizing component to operate, so that the auxiliary wheels 12 are in contact with the ground again. At this time, the auxiliary wheels 12 are at the end close to the rear wheels, and the rear swing span component is driven to operate so that the rear wheels can climb over the threshold, thereby ensuring that the hospital bed can realize the climbing process of the front wheels and the rear wheels over the threshold stone in sequence without manual lifting, thereby improving the patient's transfer efficiency.

[0026] It should be noted that, in the process of the front and rear wheels crossing the threshold stone in turn, the auxiliary wheel 12 contacts the ground and thus supports the bed frame 1, the bed board and the patient thereon, and the relative position between the auxiliary wheel 12 and the bed frame 1 can be adjusted through the stabilizing component when the front swing span component and the rear swing span component are in operation, so as to ensure that the bed board can be stably supported during the crossing of the front and rear wheels. At the same time, in the process of crossing the threshold stone, the universal wheel 2 and the front or rear wheel jointly support the bed frame 1, and the horizontal height of the auxiliary wheel 12 is flush with the multiple sets of universal wheels 2, thereby ensuring that the bed can be in a horizontal state when crossing the threshold stone, thereby preventing the patient from bumping or sliding.

[0027] In one of the more preferred embodiments, the two sets of swing span assemblies each include a base frame 13 fixedly connected to the bed frame 1, a positioning seat 20 is provided on the base frame 13, and a transverse slide groove 21 is provided on the base frame 13 for the positioning seat 20 to slide in the horizontal direction; The positioning seat 20 is provided with a vertical rod 19 that can freely move in a triangular track in the vertical direction, and the positioning seat 20 is provided with a rectangular through groove for the vertical rod 19 to slide and connect in the vertical direction.

[0028] The swing span assembly also includes a connecting rod 16 that rotates freely in the vertical direction. The connecting rod 16 rotates on the bed frame 1. A side gear 17 rotates on the connecting rod 16. The side gear 17 is meshed and connected with an inner gear ring 18. The inner gear ring 18 is fixedly connected to the base frame 13. The vertical rod 19 is fixedly rotated on the side gear 17 , and one end of the vertical rod 19 away from the side gear 17 is fixedly connected to the horizontal bracket 22 .

[0029] A worm 14 is fixedly rotatable on the bed frame 1 , and the worm 14 is meshedly connected with a worm wheel 15 . One end of a connecting rod 16 away from the side gear 17 is coaxially fixed with the worm wheel 15 . Both the worm 14 and the worm wheel 15 are fixedly rotatable on the bed frame 1 .

[0030] like Figure 2 , Figure 3 , Figure 4 and Fig.10 As shown, when the worm 14 rotates in the vertical direction, it can drive the worm wheel 15 meshing with it to rotate synchronously, wherein the connecting rod 16 and the worm wheel 15 are coaxially fixed, so the connecting rod 16 can rotate synchronously with the worm wheel 15, and the end of the connecting rod 16 away from the worm wheel 15 is provided with a side gear 17 for fixed-axis rotation, and the side gear 17 is meshed with an inner gear ring 18, and the inner gear ring 18 is fixedly connected to the bed frame 1 through the base frame 13, therefore, when the connecting rod 16 rotates in a circle, the side gear 17 can rotate while following the revolution of the connecting rod 16.

[0031] At the same time, the revolution process of the side gear 17 can change the horizontal position and height of the vertical rod 19 thereon, and the vertical rod 19 rotates on the side gear 17 with a fixed axis, and the self-rotation process of the side gear 17 can synchronously change the horizontal position and height of the vertical rod 19. Then, by controlling the meshing ratio of the side gear 17 and the inner gear ring 18, the side gear 17 can drive the vertical rod 19 to move in a triangular trajectory in the vertical direction (such as Fig.10 As shown), when the universal wheel 2 is driven to cross the threshold, it can first move upward, and then move downward and horizontally at the lowest position after crossing the threshold, as shown in FIG. Fig.10 As shown in the trajectory P in FIG. 1 , the trajectory P is the motion trajectory of the universal wheel 2 when crossing the threshold.

[0032] It should be noted that when the universal wheel 2 moves horizontally, the universal wheel 2 contacts the threshold. Therefore, the operation of the swing assembly will drive the bed frame 1 and the bed board to move a certain distance in the crossing direction. That is, after the universal wheel 2 contacts the threshold, the universal wheel 2 is hindered by the threshold and cannot continue to move horizontally. At this time, with the operation of the swing assembly, the bed frame 1 and the bed board can move a certain distance in the crossing direction of the universal wheel 2, so as to drive the base frame 13, the inner gear ring 18 and the components thereon to move synchronously, and then restore the universal wheel 2 to its initial position. Therefore, when the universal wheel 2 crosses the threshold, if the universal wheel 2 moves a certain distance in the horizontal direction, it means that the universal wheel 2 on this side has completed the crossing process.

[0033] Among them, since the universal wheel 2 is arranged below the bed frame 1 and the bed board, and the position of the universal wheel 2 is not convenient for medical staff to watch, the crossing process of the universal wheel 2 can drive the bed frame 1 and the bed board to move horizontally a certain distance under the restriction of the threshold, thereby prompting the medical staff that the universal wheel 2 on this side has crossed the threshold position.

[0034] On the basis of the embodiment of the span swing assembly, the stabilizing assembly comprises a horizontal guide cylinder 4 slidably sleeved on a guide column 3, one end of the horizontal guide cylinder 4 facing the auxiliary wheel 12 is fixedly connected to a limit column 5, a limit seat 6 is slidably sleeved on the limit column 5, a longitudinal swing seat 7 freely swinging in the vertical direction is provided on the limit seat 6, and the longitudinal swing seat 7 is fixedly rotated on the limit seat 6; The limit seat 6 is fixedly connected to a lower extension frame 11, and multiple sets of auxiliary wheels 12 are all fixedly rotated on the lower extension frame 11; The guide column 3 includes a plurality of groups of integrally formed protrusions 301 , and one end of the limit column 5 away from the horizontal guide cylinder 4 is fixedly connected with a circular ring.

[0035] The bed frame 1 is provided with a hollow swing seat 10, and the hollow swing seat 10 is fixedly rotated on the bed frame 1, and a yielding column 8 is provided on the hollow swing seat 10, and the yielding column 8 is fixedly connected to the longitudinal swing seat 7, and a circular hole is opened on the hollow swing seat 10 for the yielding column 8 to slide and observe; The outer ring of the yielding column 8 is provided with a pressure spring 9, and the two ends of the pressure spring 9 are respectively fixedly connected to the longitudinal swing seat 7 and the hollow swing seat 10.

[0036] like Figure 2 and Figure 5 As shown, the hollow swing seat 10 is driven to rotate in the vertical direction by a motor fixed on the bed frame 1, wherein the auxiliary wheel 12 is at the same height as the multiple sets of universal wheels 2 and are in contact with the ground, and when the front wheel has crossed the threshold, the hollow swing seat 10 rotates in the vertical direction and drives the yield column 8 and the longitudinal swing seat 7 to rotate synchronously. At this time, the limit seat 6 is already at the bottom of the limit column 5. Under the restriction of the circular ring, the limit seat 6 can only move in the horizontal direction through the limit column 5 and the guide column 3, thereby changing the relative position between the auxiliary wheel 12 and the bed frame 1.

[0037] At the same time, when the horizontal guide cylinder 4 collides with the raised portion 301 on one side, with the subsequent rotation of the hollow swing seat 10, the limit seat 6 cannot continue to move horizontally. At this time, the rotation of the hollow swing seat 10 can drive the limit seat 6 to move upward, thereby increasing the height of the lower extension frame 11 and the auxiliary wheel 12, so that by pushing the bed frame 1, the auxiliary wheel 12 can be unobstructed when crossing the threshold position.

[0038] Furthermore, when the auxiliary wheel 12 passes over the threshold, the hollow swing seat 10 is rotated in the opposite direction to drive the auxiliary wheel 12 to move downward, thereby making the auxiliary wheel 12 contact the ground again, and by pushing the bed frame 1, the rear wheel is close to the side of the threshold stone, and the rear swing span component is driven to drive the rear wheel to pass the threshold position, and after all the universal wheels 2 have crossed the threshold, the stabilizing component is driven to drive the universal wheel 2 to move to the initial position. It should be noted that the relative position between the auxiliary wheel 12 and the bed frame 1 changes with the crossing action of the front wheel or the rear wheel. When the front wheel crosses the threshold, the auxiliary wheel 12 is on the side close to the front wheel, and then the bed frame 1 and the bed board are supported together with the rear wheel. When the rear wheel crosses the threshold, the auxiliary wheel 12 is on the side close to the rear wheel, and then the bed frame 1 and the bed board are supported together with the front wheel. Therefore, the relative position of the auxiliary wheel 12 and the bed board is changed, so that the bed frame 1 and the patient thereon can maintain balance, and the bed can always remain level when crossing the threshold to prevent the patient from slipping.

[0039] On the basis of the embodiment of the stabilizing component, the self-adjusting component includes a pointed-angle swing rod 25 coaxially fixed with the hollow swing seat 10, and a blocking plate 23 is provided on the side of the pointed-angle swing rod 25 away from the hollow swing seat 10, and the blocking plate 23 is fixedly connected to the bed frame 1; The blocking disk 23 is provided with a plurality of groups of trapezoidal clamping blocks 26 arranged in a circular array, and the blocking disk 23 is provided with a receiving groove 28 for sliding connection of the trapezoidal clamping blocks 26, and a return spring 29 is provided in the receiving groove 28, and the two ends of the return spring 29 are respectively fixedly connected to the blocking disk 23 and the trapezoidal clamping blocks 26; The bed frame 1 is provided with a positioning plate 24 coaxial with the blocking plate 23, and the positioning plate 24 is provided with a group of clamping grooves 27 at positions corresponding to the trapezoidal clamping blocks 26; The pointed-angle swing rod 25 is provided with a tension spring 30 , and two ends of the tension spring 30 are respectively hung on the homonymous disk 24 and the pointed-angle swing rod 25 .

[0040] The bed frame 1 is fixedly connected with a V-shaped support plate 33, the same position plate 24 is fixedly rotated on the V-shaped support plate 33, and the same position plate 24 is coaxially fixed with a sector gear 31, and the sector gear 31 is meshedly connected with two sets of driven gears 32; The two groups of driven gears 32 are respectively connected to the worm gears 14 in the two groups of swing span assemblies.

[0041] like Figure 2 , Figure 6 , Figure 7 , Figure 8 and Fig. 9 As shown, in the initial state, the auxiliary wheel 12 is at the highest point of its travel level. When the bed needs to cross the threshold, the pointed-angle swing rod 25 is first driven by the motor to rotate forward. At this time, the rotation process of the pointed-angle swing rod 25 will gradually cause the tension spring 30 to stretch and deform, but one set of trapezoidal clamping blocks 26 are in the clamping groove 27, thereby limiting the rotation of the same position plate 24. When the trapezoidal clamping block 26 is squeezed and contacted with the trapezoidal clamping block 26 at the corresponding position of the clamping groove 27, the trapezoidal clamping block 26 is squeezed by the end of the pointed-angle swing rod 25 and retracts into the accommodating groove 28. At this time, the auxiliary wheel 12 moves to the bottom of the travel and is flush with the universal wheel 2 and jointly supports the bed frame 1.

[0042] At the same time, after the trapezoidal clamping block 26 retracts into the accommodating groove 28, the trapezoidal clamping block 26 disengages from the clamping groove 27. At this time, the elastic potential energy of the tension spring 30 can pull the isotropic disk 24 to rotate. The isotropic disk 24 is coaxially fixed with a fan gear 31, and at this time the fan gear 31 is meshed with a group of driven gears 32. Therefore, when the isotropic disk 24 rotates, it can drive a group of driven gears 32 to rotate, thereby driving a group of span swing components to operate, so as to drive the front wheels to cross the threshold first. In actual use, two groups of meshing bevel gears can be added between the driven gear 32 and the worm 14 to ensure that the two can be connected in transmission, so as to ensure that the worm 14 can be driven to rotate synchronously when the driven gear 32 rotates.

[0043] Furthermore, as the tension spring 30 recovers its elastic potential energy, the adjacent trapezoidal clamping block 26 contacts the clamping groove 27 and enters into the clamping groove 27. Subsequently, when the pointed-angle swing arm 25 rotates, the isotropic disk 24 still does not rotate with the extension of the tension spring 30 until the trapezoidal clamping block 26 disengages from the clamping groove 27 again. Therefore, after the front wheel crosses the threshold, the continued rotation of the pointed-angle swing arm 25 can change the horizontal position of the auxiliary wheel 12, making it close to the rear wheel side, and raise the height at the terminal position of the horizontal stroke so that it can pass the threshold position smoothly.

[0044] At the same time, by pushing the bed frame 1, the auxiliary wheel 12 is placed above the threshold. At this time, the pointed-angle swing arm 25 drives the corresponding position trapezoidal clamping block 26 to disengage from the clamping groove 27 after rotating a slight angle, and then drives the corresponding disk 24 to rotate again under the action of the elastic potential energy of the tension spring 30, thereby driving another set of driven gears 32 to rotate, so as to drive the rear wheels to complete the climbing process.

[0045] At the same time, after the two sets of swing span assemblies drive all the universal wheels 2 to cross the threshold, the sector gear 31 is no longer meshed with the two sets of driven gears 32, and the pointed swing rod 25 is continued to be driven to rotate to restore the auxiliary wheel 12 to its initial position, that is, the auxiliary wheel 12 is driven to be above the universal wheel 2 and on the side close to the front wheel, that is, on the side of the universal wheel 2 that first crosses the threshold, thereby completing the reset process of the auxiliary wheel 12.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile bed that is convenient for entering and exiting a shelter hospital, comprising a bed frame (1) for supporting a bed board and a transverse frame (22) for supporting a plurality of sets of universal wheels (2), wherein the plurality of sets of universal wheels (2) include front wheels and rear wheels, and characterized in that: The bed frame (1) is provided with an inter-span structure for driving the front wheels and the rear wheels on both sides of the bed frame (1) to sequentially cross obstacles; The inter-span structure comprises a guide column (3) fixedly connected to the bed frame (1); a plurality of sets of auxiliary wheels (12) for temporarily supporting the bed frame (1) and the universal wheels (2) are provided below the guide column (3); and a stabilizing component for driving the auxiliary wheels (12) to freely move in a rectangular track in a vertical direction is provided on the bed frame (1); The bed frame (1) is provided with a set of swing span components on both horizontal sides corresponding to the auxiliary wheels (12), and the two sets of swing span components operate alternately and respectively drive the front wheels and the rear wheels to cross obstacles; In an initial state, the auxiliary wheel (12) is horizontally positioned toward one side of the front wheel, and is a self-adjusting component on the bed frame (1) that drives two sets of swing span components and stabilizing components to operate in sequence.

2. A mobile bed that is convenient for entering and exiting a square cabin hospital according to claim 1, characterized in that: The two sets of swing span assemblies both comprise a base frame (13) fixedly connected to the bed frame (1), a positioning seat (20) being provided on the base frame (13), and a transverse slide groove (21) being provided on the base frame (13) for the positioning seat (20) to be slidably connected in a horizontal direction; The positioning seat (20) is provided with a vertical rod (19) that freely moves in a triangular track in the vertical direction, and the positioning seat (20) is provided with a rectangular through groove for the vertical rod (19) to be slidably connected in the vertical direction.

3. A mobile bed that is convenient for entering and exiting a square cabin hospital according to claim 2, characterized in that: The swing span assembly further comprises a connecting rod (16) which is freely rotatable in the vertical direction, the connecting rod (16) being fixedly rotatable on the bed frame (1), a side gear (17) being fixedly rotatable on the connecting rod (16), the side gear (17) being meshingly connected with an inner gear ring (18), and the inner gear ring (18) being fixedly connected to the base frame (13); The vertical rod (19) is fixedly axially rotated on the side gear (17), and one end of the vertical rod (19) away from the side gear (17) is fixedly connected to the horizontal bracket (22).

4. A mobile bed that is convenient for entering and exiting a square cabin hospital according to claim 3, characterized in that: A worm (14) is provided on the bed frame (1) to rotate on a fixed axis, the worm (14) is meshingly connected with a worm wheel (15), one end of a connecting rod (16) away from the edge gear (17) is coaxially fixed with the worm wheel (15), and the worm (14) and the worm wheel (15) are both fixedly rotated on the bed frame (1).

5. A mobile bed that is convenient for entering and exiting a square cabin hospital according to claim 4, characterized in that: The stabilizing component comprises a horizontal guide cylinder (4) slidably sleeved on a guide column (3); one end of the horizontal guide cylinder (4) facing the auxiliary wheel (12) is fixedly connected to a limit column (5); a limit seat (6) is slidably sleeved on the limit column (5); a longitudinal swing seat (7) that can swing freely in a vertical direction is provided on the limit seat (6); and the longitudinal swing seat (7) is fixedly rotated on the limit seat (6); The limit seat (6) is fixedly connected to a lower extension frame (11), and a plurality of sets of auxiliary wheels (12) are all fixedly axially rotated on the lower extension frame (11); The guide column (3) comprises a plurality of groups of integrally formed protrusions (301), and one end of the limit column (5) away from the horizontal guide cylinder (4) is fixedly connected to a circular ring.

6. A mobile bed that is convenient for entering and exiting a square cabin hospital according to claim 5, characterized in that: The bed frame (1) is provided with a hollow swing seat (10), and the hollow swing seat (10) is fixedly rotatable on the bed frame (1), and a clearance column (8) is provided on the hollow swing seat (10), and the clearance column (8) is fixedly connected to the longitudinal swing seat (7), and a circular hole is opened on the hollow swing seat (10) for sliding observation of the clearance column (8); The outer ring of the yielding column (8) is provided with a pressure spring (9), and the two ends of the pressure spring (9) are respectively fixedly connected to the longitudinal swing seat (7) and the hollow swing seat (10).

7. A mobile bed that is convenient for entering and exiting a square cabin hospital according to claim 6, characterized in that: The self-adjusting component comprises a pointed-angle swing rod (25) coaxially fixed to the hollow swing seat (10), a stop plate (23) being provided on a side of the pointed-angle swing rod (25) away from the hollow swing seat (10), and the stop plate (23) being fixedly connected to the bed frame (1); The blocking disk (23) is provided with a plurality of groups of trapezoidal clamping blocks (26) arranged in a ring array, and the blocking disk (23) is provided with a receiving groove (28) for sliding connection of the trapezoidal clamping blocks (26), a return spring (29) is provided in the receiving groove (28), and two ends of the return spring (29) are respectively fixedly connected to the blocking disk (23) and the trapezoidal clamping blocks (26); The bed frame (1) is provided with a coaxial disc (24) coaxial with the blocking disc (23), and the coaxial disc (24) is provided with a group of clamping grooves (27) at positions corresponding to the trapezoidal clamping blocks (26); The pointed-angle swing rod (25) is provided with a tension spring (30), and two ends of the tension spring (30) are respectively hung on the homonymous disk (24) and the pointed-angle swing rod (25).

8. A mobile bed that is convenient for entering and exiting a square cabin hospital according to claim 7, characterized in that: The bed frame (1) is fixedly connected to a V-shaped support plate (33), the aligning plate (24) is fixedly rotated on the V-shaped support plate (33), and a fan-shaped gear (31) is coaxially fixed on the aligning plate (24), and the fan-shaped gear (31) is meshingly connected to two sets of driven gears (32); The two sets of driven gears (32) are respectively connected in transmission with the worm gears (14) in the two sets of swing span assemblies.

Images