Power-assisted wheel system of medical transfer trolley

Abstract

The utility model relates to a power-assisted wheel system of a medical transfer trolley, and belongs to the field of medical equipment. According to the technical scheme, the power-assisted wheel system comprises a support, an air cylinder is fixedly arranged on the support, a cylinder body of the air cylinder is fixedly arranged on the support, the power-assisted wheel system is further fixedly provided with a hollow guide pipe, a piston rod of the air cylinder is sleeved with the guide pipe, a transmission piece is arranged at one end of the guide rod and can slide in the guide pipe, and a spring is further arranged in the guide pipe. The support is further provided with an installation frame, the middle of the installation frame is hinged to the support, one end of the installation frame is connected with the transmission piece, and the other end of the installation frame is provided with a power assisting wheel. The spring is guided through the arranged guide pipe, the direction of acting force of the piston rod and the transmission piece on the spring is always parallel to the axis direction of the spring, deformation of the spring in the non-axis direction is avoided, and then the risk that the buffering effect cannot be achieved and even the electric wheel cannot complete normal stretching and retracting actions is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a power-assisted wheel system for a medical transfer cart. Background Art

[0002] A medical transfer cart is a medical device specifically used for transferring patients. Usually, wheels, running wheels or crawlers are used as a moving platform to move bedridden patients. The main function of a medical transfer cart is to transport patients within medical facilities or between various locations to ensure the safety of patients and reduce the pain and discomfort of patients during the transfer process. A medical transfer cart usually includes adjustable supports, wheels, cushions, rollers, etc., which can be adjusted and adapted according to different patient conditions and is an essential device in the medical field.

[0003] The originally designed medical transfer cart was powered by manual pushing during use. However, some floors in the hospital have slopes. When pushing the transfer cart uphill, a large amount of force is required. Therefore, a medical transfer cart with a power-assisted wheel system was designed. As pointed out in the patent application document with the patent application number 202020961439.1: An electric wheel bracket is adjusted by a telescopic mechanism, and a buffer is arranged between the electric wheel bracket and the telescopic structure to reduce the impact of the electric wheel.

[0004] However, there are still certain problems in the above structure: The acting force of the telescopic structure on the buffer is in a different direction from the acting force of the buffer itself. When the buffer uses a spring, the spring is prone to deform in a non-axis direction, which may lead to the risk of failing to achieve the buffering effect or even the electric wheel being unable to complete normal extension and retraction actions. Summary of the Utility Model

[0005] The utility model aims at the problems in the prior art and provides a power-assisted wheel system for a medical transfer cart with the spring and the cylinder coaxial, which solves the problem that the acting force direction of the spring in the prior art has a large deviation from its own axis, resulting in the electric wheel being unable to complete normal extension and retraction actions.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A medical transport vehicle assist wheel system includes a bracket for mounting on the transport vehicle. A cylinder is fixedly installed on the bracket, with the cylinder block of the cylinder fixed on the bracket. The assist wheel system also fixedly installs a hollow guide tube. The piston rod of the cylinder is sleeved inside the guide tube. One end of the guide rod is provided with a transmission member that can slide inside the guide tube. A spring is also arranged inside the guide tube, with both ends of the spring connected to the transmission member and the piston rod respectively. An installation frame is also arranged on the bracket, with the middle part of the installation frame hinged on the bracket. One end of the installation frame is connected to the transmission member, and the other end of the installation frame is provided with an assist wheel. By arranging the guide tube to guide the spring, the acting force directions of the piston rod and the transmission member on the spring are always parallel to the spring axis direction, avoiding the deformation of the spring in a non-axis direction, and further avoiding the risk that the buffering function cannot be realized or even the electric wheel cannot complete the normal extension and retraction actions.

[0008] Preferably, one end of the guide tube is fixedly installed on the cylinder block of the cylinder. By fixing one end of the guide tube on the cylinder block, it is convenient for the guide tube, and in this way, the axis direction of the guide tube can be parallel to the axial direction of the cylinder piston rod, reducing the phenomenon of large manual errors when installing on other components.

[0009] Preferably, both ends of the spring are fixedly connected to the transmission member and the piston rod respectively. By fixedly connecting both ends of the spring to the transmission member and the piston rod respectively, the spring can always be connected to the transmission member and the piston rod during the telescopic process, avoiding the jamming phenomenon during the extension or retraction of the assist wheel.

[0010] Preferably, a connecting plate is arranged at the end of the transmission member away from the spring. A waist-shaped hole is opened on the connecting plate, and one end of the installation frame is hinged inside the waist-shaped hole. By arranging the waist-shaped hole, since the middle part of the installation frame is hinged on the bracket, one end of the installation frame connected to the transmission member will move in the vertical direction during the movement process. Through the arranged waist-shaped hole, the end of the installation frame connected to the transmission member can float up and down inside the waist-shaped hole during the movement process, avoiding the acting force of the installation frame on the transmission member in a direction other than the axial direction of the guide tube.

[0011] Preferably, two connecting plates are symmetrically arranged on the transmission member, and the end of the installation frame hinged with the waist-shaped hole is arranged between the two connecting plates. By arranging the symmetrical connecting plates, the two connecting plates and the installation frame between them are evenly stressed during the transmission process.

[0012] Preferably, the cylinder is a double-stroke cylinder. By arranging the double-stroke cylinder, in environments such as hospitals, there are plastic roads, marble roads, asphalt roads, etc. The friction coefficients of the assist wheels on different roads are different, which may cause the assist wheels to slip on marble roads with a smaller friction coefficient such as marble roads. At this time, the second stroke of the double-stroke cylinder is pushed out to increase the pressure between the assist wheel and the ground, and at this time, the slipping phenomenon of the assist wheel can be reduced.

[0013] As can be seen from the above technical solutions, the advantages of the present utility model are as follows: The spring is guided by the provided guide tube, and the acting force directions of the piston rod and the transmission member on the spring are always parallel to the spring axis direction, avoiding the deformation of the spring in the non-axis direction, and further avoiding the risk of being unable to achieve the buffering effect or even the electric wheel being unable to complete the normal extension and retraction actions. By fixedly arranging one end of the guide tube on the cylinder block, it is convenient for the guide tube, and in this way, the axis direction of the guide tube can be arranged parallel to the axial direction of the cylinder piston rod, reducing the phenomenon of large manual errors when installed on other components. By fixedly connecting the two ends of the spring to the transmission member and the piston rod respectively, the spring can always be connected to the transmission member and the piston rod during the telescopic process, avoiding the jamming phenomenon during the extension or retraction of the assisting wheel. By providing the waist-shaped hole, since the middle part of the mounting frame is hinged to the bracket, one end of the mounting frame connected to the transmission member will move in the vertical direction during the movement. By providing the waist-shaped hole, it can float up and down in the waist-shaped hole when one end of the mounting frame connected to the transmission member moves during the movement, avoiding the acting force of the mounting frame on the transmission member in the direction other than the axial direction of the guide tube. By providing the symmetric connecting plates, the two connecting plates and the mounting frame between them are evenly stressed during the transmission process. By providing the double-stroke cylinder, in environments such as hospitals, there are plastic roads, marble roads, asphalt roads, etc. The friction coefficients of the assisting wheel on different roads are different, which may cause the assisting wheel to slip on roads with a small friction coefficient such as marble roads. At this time, the second stroke of the double-stroke cylinder is pushed out to increase the pressure between the assisting wheel and the ground, and at this time, the slipping phenomenon of the assisting wheel can be reduced. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 Structural schematic diagram of the embodiment of the specific implementation manner of the present utility model Figure 1 。

[0016] Figure 2 Structural schematic diagram of the embodiment of the specific implementation manner of the present utility model Figure 2 。

[0017] Figure 3 Partial structural cross-sectional view of the embodiment of the specific implementation manner of the present utility model.

[0018] Main reference numeral description

[0019] In the figure: 1, bracket; 2, guide tube; 3, transmission part; 4, spring; 5, mounting bracket; 6, assisting wheel; 7, connecting plate; 8, kidney-shaped hole; 9, double-stroke cylinder. Specific implementation manner

[0020] In order to make the purpose, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in this specific embodiment. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of this patent.

[0021] Embodiment:

[0022] As Figures 1 - 3 shown, a medical transport vehicle assisting wheel system includes a bracket 1 for mounting on the transport vehicle. A cylinder is fixedly provided on the bracket 1, and the cylinder block of the cylinder is fixedly provided on the bracket 1. The assisting wheel system is also fixedly provided with a hollow guide tube 2. The piston rod of the cylinder is sleeved in the guide tube 2. One end of the guide rod is provided with a transmission part 3 which can slide in the guide tube 2. A spring 4 is also provided in the guide tube 2, and both ends of the spring 4 are connected to the transmission part 3 and the piston rod respectively. A mounting bracket 5 is also provided on the bracket 1. The middle part of the mounting bracket 5 is hinged to the bracket 1. One end of the mounting bracket 5 is connected to the transmission part 3, and the other end of the mounting bracket 5 is provided with an assisting wheel 6. In this embodiment, the cylinder is a double-stroke cylinder 9. With such a setting, the spring 4 is guided through the provided guide tube 2, and the acting force directions of the piston rod and the transmission part 3 on the spring 4 are always parallel to the axis direction of the spring 4, avoiding the deformation of the spring 4 in the non-axis direction, and further avoiding the risk of not being able to achieve the buffering effect or even the electric wheel not being able to complete the normal extension and retraction actions. By providing the double-stroke cylinder 9, in environments such as hospitals, there are plastic pavements, marble pavements, asphalt pavements, etc. The friction coefficients of the assisting wheel 6 on different pavements are different, which may cause the assisting wheel 6 to slip on pavements with a small friction coefficient such as marble pavements. At this time, the second stroke of the double-stroke cylinder 9 is pushed out to increase the pressure between the assisting wheel 6 and the ground, and the slipping phenomenon of the assisting wheel 6 can be reduced at this time.

[0023] In this embodiment, one end of the guide tube 2 is fixedly provided on the cylinder block of the cylinder. With such a setting, by fixedly setting one end of the guide tube 2 on the cylinder block, it is convenient for the guide tube 2, and with such a setting, the axis direction of the guide tube 2 and the axial direction of the cylinder piston rod can be set parallel, reducing the phenomenon of large manual errors when installing on other components.

[0024] In this embodiment, both ends of the spring 4 are fixedly connected to the transmission member 3 and the piston rod respectively. With such a setting, by fixedly connecting both ends of the spring 4 to the transmission member 3 and the piston rod respectively, the spring 4 can always be connected to the transmission member 3 and the piston rod during the telescopic process, avoiding the jamming phenomenon during the extension or retraction of the assist wheel 6.

[0025] In this embodiment, a connecting plate 7 is provided at one end of the transmission member 3 away from the spring 4. A kidney-shaped hole 8 is formed in the connecting plate 7. One end of the mounting bracket 5 is hinged in the kidney-shaped hole 8. With such a setting, due to the kidney-shaped hole 8 provided, since the middle part of the mounting bracket 5 is hinged to the bracket 1, one end of the mounting bracket 5 connected to the transmission member 3 will move in the vertical direction during the movement. Through the kidney-shaped hole 8 provided, the one end of the mounting bracket 5 connected to the transmission member 3 can float up and down in the kidney-shaped hole 8 during the movement, avoiding the force exerted by the mounting bracket 5 on the transmission member 3 in a direction other than the axial direction of the guide tube 2.

[0026] In this embodiment, two connecting plates 7 are symmetrically arranged on the transmission member 3. One end of the mounting bracket 5 hinged to the kidney-shaped hole 8 is arranged between the two connecting plates 7. With such a setting, through the symmetrically arranged connecting plates 7, the two connecting plates 7 and the mounting bracket 5 between the connecting plates 7 are evenly stressed during the transmission process.

[0027] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A medical transport vehicle power-assisted wheel system, comprising a bracket (1), the bracket (1) being used for being installed on the transport vehicle, characterized in that: A cylinder is fixedly arranged on the bracket (1), and a cylinder body of the cylinder is fixedly arranged on the bracket (1). A hollow guide tube (2) is also fixedly arranged on the power-assist wheel system. The piston rod of the cylinder is sleeved in the guide tube (2). A transmission member (3) is arranged at one end of the guide rod. The transmission member (3) can slide in the guide tube (2). A spring (4) is also arranged in the guide tube (2). Two ends of the spring (4) are respectively connected to the transmission member (3) and the piston rod. A mounting frame (5) is also arranged on the bracket (1). The middle part of the mounting frame (5) is hinged on the bracket (1). One end of the mounting frame (5) is connected to the transmission member (3). The other end of the mounting frame (5) is provided with a power-assist wheel (6).

2. The medical transport vehicle power-assisted wheel system according to claim 1, characterized in that: One end of the guide tube (2) is fixedly arranged on the cylinder body of the cylinder.

3. The power-assisted wheel system for a medical transport vehicle according to claim 1, characterized in that: The two ends of the spring (4) are fixedly connected to the transmission member (3) and the piston rod respectively.

4. The power-assisted wheel system for medical transport vehicle according to claim 3, characterized in that: A connecting plate (7) is arranged at one end of the transmission member (3) away from the spring (4), a waist-shaped hole (8) is opened on the connecting plate (7), and one end of the mounting frame (5) is hinged in the waist-shaped hole (8).

5. The medical transport vehicle power-assisted wheel system according to claim 4, characterized in that: Two connecting plates (7) are symmetrically arranged on the transmission member (3), and one end of the mounting frame (5) hinged to the waist-shaped hole (8) is arranged between the two connecting plates (7).

6. The power-assisted wheel system for a medical transport vehicle according to claim 5, characterized in that: The cylinder is a double-stroke cylinder (9).

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