Medical stretcher trolley

Abstract

The present application relates to a medical stretcher having a body and a movable bed plate mechanism attached to the body, the movable bed plate mechanism including an upper bed plate, a driving roller, a conveyor belt and a mounting seat, the upper bed plate is detachably connected to the mounting seat, the driving roller is rotatably connected to the mounting seat, the conveyor belt is fitted to the outside of the driving roller and the upper bed plate and is tensioned by the driving roller and the upper bed plate, the driving roller is detachably connected to a second driving mechanism by a clutch mechanism at both ends and rotates under the driving of the second driving mechanism, the mounting seat is provided with a limiting member for limiting the driving roller in the radial direction, and when the limiting member and the driving roller are misaligned, the driving roller can be provided separately from the mounting seat. The present application relates to a medical stretcher having a body and a movable bed plate mechanism attached to the body, the movable bed plate mechanism including an upper bed plate and a driving roller that are easily removable, the conveyor belt can be easily removed, replaced and cleaned by providing a driving roller and an upper bed plate that are easily removable, and the clutch mechanism facilitates separation from the second driving mechanism, and the clutch mechanism facilitates separation from the second driving mechanism, and the clutch mechanism facilitates removal of the conveyor belt, replacement and cleaning.

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application claims priority from a Chinese patent application filed with the China Patent Office on June 18, 2021, with application number "202110679023.X" and titled "Medical Stretcher." This application relates to medical transport equipment, and more particularly to medical stretchers. [Background technology]

[0002] A medical stretcher is a specialized medical bed for transferring patients between beds, from the operating table to the hospital room, and from an ambulance to the hospital. The application of the stretcher solves the difficulty of transferring patients from the operating table to the hospital room after surgery, and reduces the pain and difficulty caused to patients by traditional manual lifting. Therefore, it is an essential medical equipment in hospitals.

[0003] Related art for medical stretchers mainly includes a moving body and a mobile bedplate mechanism for loading and unloading a patient by moving them laterally. The mobile bedplate mechanism mainly includes a bedplate that can move laterally under the drive of a first drive mechanism. To allow the patient to easily move from the original patient bed to the bedplate, the mobile bedplate mechanism is often provided with conveying rollers and a tensioned conveying belt fitted around the conveying rollers and the bedplate, which rotates cyclically around the conveying rollers and the bedplate as the conveying rollers rotate. When a patient needs to be transferred from the original patient bed to a stretcher, the first drive mechanism drives the bedplate to move laterally between the patient and the original patient bed. During this movement, the conveying rollers rotate the conveying belt, and the patient is moved onto the bedplate by the friction between the conveying belt and the patient's body. Finally, the first drive mechanism drives the bedplate in reverse, returning it to move laterally against the body, completing the patient's transfer.

[0004] However, because the conveyor belt comes into direct contact with the patient's body, its surface is prone to becoming soiled with blood, drugs, and other contaminants. With existing medical stretchers, it is inconvenient to remove the conveyor belt, and cleaning the surface of the belt is difficult. Summary of the Invention [Problem to be solved by the invention]

[0005] In view of this, the present disclosure provides a medical stretcher, the technical solutions of which are as follows:

[0006] A medical stretcher comprising a body and a movable bed plate mechanism attached to the body, the movable bed plate mechanism comprising an upper bed plate, drive rollers, a conveyor belt, and a mounting seat, the upper bed plate is detachably connected to the mounting seat, the drive roller is rotatably connected to the mounting seat, the conveyor belt is fitted to the outside of the drive roller and upper bed plate and is tensioned by the drive roller and upper bed plate, a second drive mechanism is detachably connected to both ends of the drive roller by a clutch mechanism and rotates under the drive of the second drive mechanism, a limiting member is provided on the mounting seat to limit the drive roller in the radial direction, and the drive roller can be separated from the mounting seat if the limiting member and the drive roller are misaligned. [Means for solving the problem]

[0007] In one possible embodiment, the movable bed plate mechanism further includes a lower bed plate, one side of which is connected to the mounting seat and supported on the lower end of the upper bed plate, and the upper bed plate is horizontally restricted relative to the lower bed plate by a synchronizing member.

[0008] In one possible embodiment, the synchronizing member is a T-shaped bolt, the bolt is connected to the upper bed plate, a T-shaped groove is opened in the mounting seat, the bolt is positioned in the T-shaped groove and is horizontally restricted by the T-shaped groove.

[0009] In one possible embodiment, a mating groove is opened at the bottom of the T-shaped groove, a positioning boss is provided on the limiting member, the positioning boss is positioned in the mating groove, and when the deformed bolt is positioned in the mating groove, the deformed bolt abuts against the upper end of the positioning boss.

[0010] In one possible embodiment, the limiting member is a locking plate, which is rotatably connected to the mounting seat, and the locking plate is disposed on the mounting seat so as to cover the drive roller and engage with the mounting groove to form a mounting cavity.

[0011] In one possible embodiment, the locking plate has a shielding portion and a limiting portion that are provided separately, one limiting portion is provided at each end of the drive roller, and the shielding portion is located between the two limiting portions.

[0012] In one possible embodiment, the clutch mechanism includes a first clutch shaft connected to an end of the drive roller and a second clutch shaft drilled in the axial direction of the first clutch shaft and slidably connected to a mounting seat, the body is provided with a third drive mechanism for sliding the second clutch shaft, the first clutch shaft and the second clutch shaft are coaxial, and a connection boss is provided on each of the opposing ends of the first clutch shaft and the second clutch shaft, and when the first clutch shaft and the second clutch shaft rotate synchronously, the connection boss of the first clutch shaft abuts on one side of the connection boss of the second clutch shaft, and the second drive mechanism rotates the second clutch shaft.

[0013] In one possible embodiment, the second drive mechanism includes a rack located above the second clutch shaft and extending in the sliding direction of the mounting seat, and a gear arranged circumferentially along the second clutch shaft, the rack being connected to a body, and when the second clutch shaft slides on the mounting seat, the second clutch shaft is always maintained in a meshed state by the gear and the rack.

[0014] In one possible embodiment, the third drive mechanism includes a rotating plate rotatably connected to the body, a drive member for rotating the rotating plate, and an elastic member for driving the second clutch shaft away from the first clutch shaft, the rotating plate extending in the sliding direction of the mounting seat, one end of the second clutch shaft being exposed to the mounting seat, and the elastic member being positioned between the second clutch shaft and the mounting seat.

[0015] In one possible embodiment, a mounting groove is provided in the mounting seat, the drive roller is disposed in the mounting groove and rotatably connected thereto, at least three limiting roll groups are rotatably connected to the inner wall of the mounting cavity, the limiting roll groups are all arranged circumferentially along the drive roller, and the limiting roll group includes a plurality of limiting rolls arranged axially along the drive roller, and the limiting rolls and drive rollers are respectively abutted against both surfaces of the conveying belt.

[0016] Compared with the prior art, the medical stretcher of the present invention has the following beneficial effects: 1. The drive roller can be separated from the second drive mechanism by a clutch mechanism, and a limiting member is provided so that the drive roller can be directly removed from the mounting seat. The upper bed plate and the mounting seat are detachably connected, so that the drive roller and the conveyor belt fitted on the outside of the upper bed plate can be removed as a whole, facilitating replacement and cleaning.

[0017] 2. The lower bed plate supports the upper bed plate, improving stability when installing the upper bed plate and transferring the patient.

[0018] 3. By providing the deformed bolts and T-shaped grooves, when installing the upper bed plate, the deformed bolts are placed in the T-shaped grooves, and the upper bed plate is simply placed on top of the lower bed plate, which allows for limited and synchronous sliding between the upper and lower bed plates, making it easier to install and remove the upper bed plate.

[0019] 4. When the upper bed plate is attached to the lower bed plate due to the engagement between the positioning boss and the deformed bolt, the deformed bolt can restrict the positioning boss, so that the restriction part cannot be released during use, and stable rotation of the drive roller in the mounting cavity is maintained.

[0020] 5. By providing a locking plate that is rotatably connected to the mounting seat, when attaching or detaching the drive roller, the drive roller can be separated from the mounting seat simply by rotating the locking plate.

[0021] 6. By providing the shielding part and the limiting part separately, the drive roller can be cleaned by opening the shielding part even while the upper bed plate is in use, making it easy to operate.

[0022] 7. By providing a group of limiting rolls, the rotation stability of the drive roller can be improved and the force deformation of the drive roller can be reduced.

[0023] 8. By providing a connecting boss between the first clutch shaft and the second clutch shaft, the drive roller and the second drive mechanism can be easily connected and disconnected, improving the convenience of removing the drive roller.

[0024] 9. By providing a second drive mechanism, it can be linked with the first drive mechanism. When the upper bed plate slides horizontally, the rotation of the drive roller can be controlled simply by pushing the second clutch shaft with the rotating plate, which makes it easier to control and saves the second drive source.

[0025] 10. By providing the third drive mechanism, drive control of the second clutch shaft becomes easier.

[0026] Therefore, the present invention has the advantage that the conveyor belt can be easily removed and cleaned. [Brief explanation of the drawings]

[0027] [Figure 1] FIG. 1 is a schematic diagram of the overall structure of a medical stretcher provided in the present application in an initial state. [Figure 2]FIG. 1 is a structural exploded schematic diagram of a mobile bed plate mechanism of a medical stretcher provided herein. [Figure 3] FIG. 1 is a structural schematic diagram of a clutch mechanism of a medical stretcher provided in the present application. [Figure 4] FIG. 1 is a schematic diagram of the overall structure of the medical stretcher provided in the present application, with the movable bed plate mechanism sliding outward. [Figure 5] FIG. 3 is an enlarged view of a portion A in FIG. 2. DETAILED DESCRIPTION OF THE INVENTION

[0028] In order to make the objectives, features and advantages of the present application clearer and easier to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, but it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. Based on the embodiments of the present application, all other embodiments that can be obtained by those skilled in the art without any creative efforts fall within the scope of protection of the present application. [Example]

[0029] 1 to 5 show an embodiment of a medical stretcher provided herein.

[0030] 1, a medical stretcher comprises a body and a movable bed plate mechanism 3 attached to the body, the body comprises a movable frame 1 and a bed base 2 for attaching the movable bed plate mechanism 3, casters 11 for moving the body are attached to the lower end of the movable frame 1, and an adjustment mechanism (not shown) is provided within the movable frame 1 for vertically adjusting the height of the bed base 2. The movable bed plate mechanism 3 can reciprocate relative to the bed base 2 and move horizontally across it.

[0031] When in use, the body is moved to one side of the original patient bed using the casters 11, and then the height of the bed base 2 is adjusted using the adjustment mechanism so that the mobile bed plate mechanism 3 is slightly higher than the top surface of the original patient bed. Next, the mobile bed plate mechanism 3 is moved horizontally between the patient's body and the original patient bed, and the patient is transferred onto the mobile bed plate mechanism 3. Finally, the mobile bed plate mechanism 3 is returned to the bed base 2 so that it moves horizontally, completing the transfer of the patient.

[0032] 2 and 3, the movable bed plate mechanism 3 includes a lower bed plate 31, an upper bed plate 32, a drive roller 33, a mounting seat 34, a conveyor belt 35, a first drive mechanism 4 for horizontally sliding the upper bed plate 32 and the lower bed plate 31, a second drive mechanism 5 for rotating the drive roller 33, and a clutch mechanism 6 for interlocking the drive roller 33 with the second drive mechanism 5. The conveyor belt 35 is fitted onto the outside of the drive roller 33 and the upper bed plate 32, and is tensioned by the drive roller 33 and the upper bed plate 32.

[0033] The driving roller 33 is a rubber roller having a surface made of rubber material, which can increase the frictional force with the conveyor belt 35 and provide stability in conveyance. The driving roller 33 may be made of other materials, and the present application is not limited thereto.

[0034] 4, the lower bed plate 31 is placed on the upper end surface of the bed base 2. The mounting base 34 is fixedly connected to the side of the lower bed plate 31 that faces away from the moving direction, which is the direction in which the movable bed plate mechanism 3 moves back to the patient bed.

[0035] Referring to Figure 4, a group of first drive mechanisms 4 is provided on each end of the mounting seat 34. The first drive mechanism 4 includes a chain 41, a sprocket 42 that meshes with the chain 41, and a motor (not shown) that drives the sprocket 42 to rotate, and the motor is mounted within the moving frame 1. A chain connecting plate 346 is fixed to the mounting seat 34, and both ends of the chain 41 are fixedly connected to both ends of the chain connecting plate 346 in the sliding direction. One support wheel 21 is rotatably connected to each end of the bed base 2 located in the sliding direction of the mounting seat 34, so that the portion of the chain 41 located on the mounting seat 34 is horizontal. When the motor drives the sprocket 42 to rotate, the chain 41 operates, thereby sliding the mounting seat 34 and lower bed plate 31 horizontally.

[0036] 2 and 5, the upper bed plate 32 is placed on the lower bed plate 31 and positioned on one side of the mounting seat 34, and the upper bed plate 32 and the lower bed plate 31 are horizontally restricted by the synchronizing member and maintained in a state of horizontal synchronous sliding.

[0037] A T-shaped groove 341 with a T-shaped horizontal cross section is formed at each end of the mounting seat 34. A connection block 321 is fixed to the bottom of one end of the upper bed plate 32 facing the mounting seat 34, and the synchronizing member is a T-shaped bolt 322 with a T-shaped horizontal cross section. The bolt 322 is drilled horizontally and screwed into the connection block 321 for easy connection. The screw-fit relationship between the bolt 322 and the connection block 321 can adjust the gap between the drive roller 33 and the upper bed plate 32, thereby adjusting the tension of the conveyor belt 35.

[0038] When the upper bed plate 32 rides up onto the lower bed plate 31, the deformed bolts 322 are positioned in the T-shaped grooves 341, which restricts the upper bed plate 32 horizontally relative to the lower bed plate 31 and maintains a synchronous sliding state.

[0039] When removing the upper bed plate 32, the upper bed plate 32 is lifted up in a horizontal position and the deformed bolts 322 are released from the T-shaped grooves 341, which makes it easy to remove the conveyor belt 35 from the upper bed plate 32.

[0040] Referring to FIG. 5, a mounting groove 342 having a semicircular cross section is formed in the mounting seat 34, and the drive roller 33 is disposed in the mounting groove 342 and can rotate along its own axis within the mounting groove 342.

[0041] 3 and 5, a limiting member is provided on the mounting seat 34 to limit the movement of the drive roller 33 in the radial direction. In this embodiment, the limiting member is a locking plate 343, which is rotatably connected to the mounting seat 34 and located above the mounting groove 342.

[0042] The locking plate 343 has a shielding portion 3431 and two limiting portions 3432. The shielding portion 3431 and the two limiting portions 3432 are provided separately and can rotate independently. When the locking plate 343 rotates to cover the drive roller 33, the locking plate 343 engages with the mounting groove 342 to form a mounting cavity. The two limiting portions 3432 are located on both ends of the drive roller 33 and are provided to cover the end positions of the drive roller 33. They limit the drive roller 33 within the mounting groove 342. When the drive roller 33 needs to be removed, the limiting portion 3432 can be rotated relative to the mounting seat 34 to open the mounting groove 342, making operation easy. The shielding portion 3431 is provided to cover the middle portion of the drive roller 33, preventing foreign matter such as dust from entering the mounting groove 342 and interfering with the rotation of the drive roller 33. The shielding portion 3431 can be opened independently, making it easy to clean the drive roller 33.

[0043] 5 , at least three limiting roll groups are rotatably connected to the inner wall of the mounting cavity, and the limiting roll groups are arranged at equal intervals around the drive roller 33, forming a three-point limit for the drive roller 33, thereby maintaining stable rotation of the drive roller 33 within the mounting cavity. In this embodiment, four limiting roll groups are provided, located above and below the drive roller 33 and on both the left and right horizontal sides. The limiting roll group located below the drive roller 33 simultaneously supports the drive roller 33 and prevents deformation of the drive roller 33. The limiting roll groups include a plurality of limiting rolls 345 arranged axially along the drive roller 33. When the conveyor belt 35 is fitted around the drive roller 33, the conveyor belt 35 passes between the drive roller 33 and the limiting rolls 345, and the limiting rolls 345 further increase the friction between the conveyor belt 35 and the drive roller 33.

[0044] 3, a fitting groove is opened at the bottom of the T-shaped groove 341, and a positioning boss 3433 is integrally connected to the side of the limiting part 3432 facing the T-shaped groove 341, and the positioning boss 3433 is located in the fitting groove. When the upper bed plate 32 is placed on the lower bed plate 31 and is horizontally limited to the lower bed plate 31, the deformed bolt 322 is located in the T-shaped groove 341 and abuts on the upper end surface of the positioning boss 3433, which prevents the limiting part 3432 from rotating and opening, and the drive roller 33 is stably positioned in the mounting groove 342 by the limiting part 3432.

[0045] When the conveying belt 35 needs to be replaced, the locking plate 343 is opened and the clutch mechanism 6 is used to release the connection with the second driving mechanism 5, allowing the driving roller 33 to be removed from the mounting groove 342, making it easy to replace the conveying belt 35.

[0046] 3 and 5, the clutch mechanism 6 comprises a first clutch shaft 61 integrally molded on the end of the drive roller 33 and a second clutch shaft 62 drilled in the axial direction of the first clutch shaft 61 and slidably connected to the mounting seat 34, the first clutch shaft 61 and the second clutch shaft 62 being coaxial, and a connection boss 63 being provided on each of the opposing ends of the first clutch shaft 61 and the second clutch shaft 62.

[0047] A third drive mechanism 7 is provided on the body for sliding the second clutch shaft 62. When the first clutch shaft 61 and the second clutch shaft 62 rotate synchronously, the third drive mechanism 7 pushes the first clutch shaft 61 to slide toward the second clutch shaft 62, causing the connecting boss 63 of the first clutch shaft 61 and the connecting boss 63 of the second clutch shaft 62 to engage with each other, thereby exerting a circumferential restriction effect and achieving power transmission. When there is no need to rotate the drive roller 33, the third drive mechanism 7 slides the first clutch shaft 61 in a direction away from the second clutch shaft 62, disengaging the connecting boss 63 of the first clutch shaft 61 from the connecting boss 63 of the second clutch shaft 62 and separating the first clutch shaft 61 and the second clutch shaft 62, thereby facilitating removal of the drive roller 33 from the mounting groove 342.

[0048] 3 and 5, the second drive mechanism 5 includes a rack 52 located above the second clutch shaft 62 and extending in the sliding direction of the mounting seat 34, and a gear 53 provided circumferentially along the second clutch shaft 62. Both ends of the rack 52 are fixedly connected to the bed base 2. The width of the gear 53 on the second clutch shaft 62 is set to be equal to or greater than the total length obtained by adding the width of the rack 52 and the sliding distance of the second clutch shaft 62, so that when the second clutch shaft 62 slides on the mounting seat 34, the second clutch shaft 62 can always be maintained in a meshed state by the gear 53 and the rack 52. When the first drive mechanism 4 slides the mounting seat 34 and the second clutch shaft 62 horizontally, the second clutch shaft 62 is always maintained in a rotating state by the engagement between the gear 53 and the rack 52.

[0049] Referring to Figure 3, the third drive mechanism 7 includes a rotating plate 71 rotatably connected to the body, a drive member (not shown) that rotates the rotating plate 71, and an elastic member 72 that drives the second clutch shaft 62 away from the first clutch shaft 61.

[0050] One end of the second clutch shaft 62 passes through the mounting seat 34 and is exposed therefrom, and a return convex ring 621 is integrally formed on the end of the second clutch shaft 62. An elastic member 72 is fixedly connected to the mounting seat 34, and the elastic member 72 may be a spring or an elastic layer made of an elastic material such as rubber, and in this embodiment a spring is used as an example for explanation, and when one end of the spring abuts against the return convex ring 621 and the first clutch shaft 61 and second clutch shaft 62 are engaged, the spring receives force and is put into a compressed state.

[0051] The rotating plate 71 is rotatably connected to the bed base 2 by a rotating shaft 711, which is located on the side of the rotating plate 71 that is away from the second clutch shaft 62. The rotating plate 71 extends in the sliding direction of the mounting seat 34 and covers all sliding positions of the mounting seat 34, so that no matter how far the mounting seat 34 slides, the rotating plate 71 can rotate and push the second clutch shaft 62 so that it slides in the direction of the first clutch shaft 61 and engages with it.

[0052] The driving member for rotating the rotating plate 71 belongs to the prior art and can be realized by a driving cylinder or a crank slider structure, but a detailed description thereof will be omitted here.

[0053] The adjustment mechanism belongs to the prior art and is used to adjust the distance between the bed base 2 and the moving frame 1. It can be driven by a screw slider structure or a hydraulic cylinder or other structure to realize the lifting and lowering of the bed base 2, so that the bed base 2 and the moving bed plate mechanism 3 can adapt to original patient beds of different heights to complete the transfer operation, but detailed description thereof will be omitted here.

[0054] The specific implementation principle of this embodiment is as follows.

[0055] When in use, the bed base 2 is moved to one side of the original patient bed by the moving frame 1, and the bed base 2 is adjusted to an appropriate height by the adjusting mechanism so that the lower surface of the lower bed board 31 is flush with the upper surface of the original patient bed.

[0056] Then, the motor drives the sprocket 42 to operate the chain 41, causing the mounting seat 34 to slide horizontally, and the mounting seat 34 causes the lower bed plate 31 to slide out horizontally, and the upper bed plate 32 achieves synchronous movement through the engagement of the deformed bolt 322 with the T-shaped groove 341 of the mounting seat 34, so that both the upper bed plate 32 and the lower bed plate 31 move between the patient's body and the top surface of the original patient bed. During the process of the upper bed plate 32 moving between the patient's body and the original patient bed, the second clutch shaft 62 continues to rotate along its own axis toward the mounting seat 34 due to the engagement between the gear 53 and the upper rack 52. In this case, the rotation of the rotating plate 71 pushes the second clutch shaft 62 until it engages with the first clutch shaft 61, which then rotates the drive roller 33, which then pulls the conveyor belt 35 in the direction opposite to the movement direction of the upper bed plate 32. As a result, the friction force between the conveyor belt 35 and the patient's body makes it easier to move the patient's body to the upper bed plate 32. When the patient's body has been completely transferred onto the upper bed plate 32, the first driving mechanism 4 drives the upper bed plate 32 and the lower bed plate 31 to return to the bed base 2 in a horizontal direction. During this process, the force of the rotating plate 71 on the second clutch shaft 62 is released, and the second clutch shaft 62 is separated from the first clutch shaft 61 by the elastic force of the elastic member 72. In this case, while the upper bed plate 32 is moving, the driving roller 33 and the conveying belt 35 remain stationary, making the patient's position on the upper bed plate 32 stable and completing the transfer of the patient.

[0057] When removing the conveyor belt 35 for replacement or cleaning, first lift the upper bed plate 32, remove the deformed bolt 322 from the T-shaped groove 341, and then open the locking plate 343. With the rotating plate 71 not biased, the first clutch shaft 61 and the second clutch shaft 62 are always kept separated by the elastic member 72, and the drive roller 33 can be directly removed from the mounting groove 342. As a result, the drive roller 33 and the conveyor belt 35 fitted on the outside of the upper bed plate 32 can be directly removed, facilitating replacement and cleaning.

[0058] In the description herein, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in the embodiment or example are included in at least one embodiment or example of the present application. The described specific features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, a person skilled in the art may combine or combine different embodiments or examples and features of different embodiments or examples described herein without inconsistency.

[0059] Additionally, the terms "first," "second," etc. are for descriptive purposes only and should not be understood to indicate or imply the relative importance or quantity of the indicated technical features. Thus, a feature qualified as "first" or "second" may expressly or imply the inclusion of at least one of the feature. In the description of this application, unless expressly and specifically limited, "plurality" means two or more than two.

[0060] The above are only specific embodiments of the present application, and the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope described in the present application shall be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be equivalent to the scope of protection of the claims. [Explanation of symbols]

[0061] 1: Moving frame 11: Caster 2: Bed base 21: Support wheel 3: Moving bed plate mechanism 31: Lower bed board 32: Upper bed board 321: Connection block 322: Deformed bolt 33: Drive roller 34: Mounting seat 341:T-shaped groove 342: Mounting groove 343: Locking plate 3431: Shield part 3432: Restriction section 3433: Positioning boss 345: Restricted Role 346: Chain connecting plate 35: Conveyor belt 4: First drive mechanism 41: Chain 42: Sprocket 5: Second drive mechanism 52: Rack 53: Gear 6: Clutch mechanism 61: First clutch shaft 62: Second clutch shaft 621: Convex ring for return 63: Connection Boss 7: Third drive mechanism 71: Rotating plate 711: Rotating axis 72: Elastic member

Claims

1. A medical stretcher comprising a body and a movable bed plate mechanism (3) attached to the body, the movable bed plate mechanism (3) comprising an upper bed plate (32), a drive roller (33), a conveyor belt (35), and a mounting seat (34); The upper bed plate (32) is removably connected to a mounting seat (34), The drive roller (33) is rotatably connected to a mounting seat (34), The conveyor belt (35) is fitted onto the outside of the driving roller (33) and the upper bed plate (32), and is tensioned by the driving roller (33) and the upper bed plate (32); The drive roller (33) is detachably connected to a second drive mechanism (5) by a clutch mechanism (6) at both ends, and rotates under the driving force of the second drive mechanism (5). The mounting seat (34) is provided with a limiting member for limiting the drive roller (33) in the radial direction, and if the limiting member and the drive roller (33) are misaligned, the drive roller (33) can be separated from the mounting seat (34) and installed. The limiting member is a locking plate (343), the locking plate (343) is rotatably connected to the mounting seat (34), the locking plate (343) is provided on the driving roller (33) so as to cover the driving roller (33) and engages with the mounting groove (342) to form a mounting cavity; The locking plate (343) has a shielding portion (3431) and a limiting portion (3432) that are provided separately, and the limiting portion (3432) is provided at each end of the driving roller (33), and the shielding portion (3431) is located between the two limiting portions (3432). Medical stretcher.

2. The moving bed plate mechanism (3) further comprises a lower bed plate (31), one side of which is connected to a mounting seat (34) and supports the lower end of the upper bed plate (32), and the upper bed plate (32) is horizontally restricted relative to the lower bed plate (31) by a synchronizing member.

2. The medical stretcher according to claim 1.

3. The synchronizing member is a T-shaped bolt (322) connected to the upper bed plate (32), a T-shaped groove (341) is formed in the mounting seat (34), and the bolt (322) is positioned in the T-shaped groove (341) and horizontally restricted by the T-shaped groove (341).

3. The medical stretcher according to claim 2.

4. A fitting groove is provided at the bottom of the T-shaped groove (341), a positioning boss (3433) is provided on the restricting member, the positioning boss (3433) is positioned in the fitting groove, and when the deformed bolt (322) is positioned in the fitting groove, the deformed bolt (322) abuts against the upper end of the positioning boss (3433).

4. The medical stretcher according to claim 3.

5. The clutch mechanism (6) comprises a first clutch shaft (61) connected to an end of the drive roller (33) and a second clutch shaft (62) drilled in its axial direction and slidably connected to a mounting seat (34), the body is provided with a third drive mechanism (7) for sliding the second clutch shaft (62), the first clutch shaft (61) and the second clutch shaft (62) are coaxial, and a connection boss (63) is provided on each of the opposing ends of the first clutch shaft (61) and the second clutch shaft (62), and when the first clutch shaft (61) and the second clutch shaft (62) rotate synchronously, the connection boss (63) of the first clutch shaft (61) abuts against one side of the connection boss (63) of the second clutch shaft (62), and the second drive mechanism (5) rotates the second clutch shaft (62).

2. The medical stretcher according to claim 1.

6. The second drive mechanism (5) includes a rack (52) located above the second clutch shaft (62) and extending in the sliding direction of the mounting seat (34), and a gear (53) provided in the circumferential direction along the second clutch shaft (62), and when the rack (52) is connected to the body and the second clutch shaft (62) slides on the mounting seat (34), the second clutch shaft (62) is always maintained in a meshed state by the gear (53) and the rack (52).

6. The medical stretcher according to claim 5.

7. The third drive mechanism (7) comprises a rotating plate (71) rotatably connected to the body, a drive member for rotating the rotating plate (71), and an elastic member (72) for driving the second clutch shaft (62) so as to move away from the first clutch shaft (61), wherein the rotating plate (71) extends in the sliding direction of the mounting seat (34), one end of the second clutch shaft (62) is exposed to the mounting seat (34), and the elastic member (72) is positioned between the second clutch shaft (62) and the mounting seat (34).

6. The medical stretcher according to claim 5.

8. The mounting seat (34) is provided with a mounting groove (342), the drive roller (33) is disposed in the mounting groove (342) and rotatably connected thereto, at least three limiting roll groups are rotatably connected to the inner wall of the mounting cavity, the limiting roll groups are all arranged in the circumferential direction along the drive roller (33), and the limiting roll group includes a plurality of limiting rolls (345) arranged in the axial direction along the drive roller (33), and the limiting rolls (345) and the drive roller (33) are respectively in contact with both surfaces of the conveyor belt (35).

2. The medical stretcher according to claim 1.

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