Multi-wheelchair quick connection flexible traction device

Abstract

The invention provides a multi-wheelchair rapid connection flexible traction device. The multi-wheelchair rapid connection flexible traction device comprises a first connecting piece, a second connecting piece and a third connecting piece used for connecting the first connecting piece and the second connecting piece. Wherein the first connecting piece comprises two first connecting assemblies which are oppositely arranged, and each first connecting assembly comprises a first connecting rod and a clamping mechanism which is arranged at one end of the first connecting rod; the other ends of the two first connecting rods are hinged through a first screw rod which is longitudinally arranged, and the first screw rod is axially perpendicular to the first connecting rods; the second connecting piece comprises a wheel connecting assembly and a second connecting assembly connected to the wheel connecting assembly, the second connecting assembly comprises two second connecting rods which are oppositely arranged, and one end of each second connecting rod is hinged to the wheel connecting assembly; the other ends of the two second connecting rods are hinged through a second screw rod which is longitudinally arranged, and the second screw rod is axially perpendicular to the second connecting rods; the third connecting piece is hinged to the first screw rod and the second screw rod.

Description

Technical Field

[0001] The invention relates to the technical field of traction connection structures, and in particular to a flexible traction device for quick connection of multiple wheelchairs. Background Art

[0002] At present, there are a large number of patients or elderly people with mobility problems in hospitals or nursing centers who need to use wheelchairs to travel. However, when an emergency occurs, such as a sudden natural disaster such as an earthquake or flood, or an accident such as a fire or electrical failure, or a public health incident, due to the limited number of nursing staff, the nursing staff can only push one wheelchair at a time and cannot quickly complete the transfer of multiple people with mobility problems, which seriously affects the transfer speed of the nursing staff. Summary of the invention

[0003] The purpose of the present invention is to provide a multiple wheelchair quick-connect flexible traction device, which can quickly connect multiple wheelchairs in series in sequence, so that nursing staff can push multiple wheelchairs at a time, thereby significantly improving the transfer speed for people with mobility impairments.

[0004] In order to achieve the above object, the present invention provides a multiple wheelchair quick connection flexible traction device, comprising:

[0005] a first connecting member for connecting to a front wheelchair;

[0006] a second connecting member for connecting the rear wheelchair; and a third connecting member for connecting the first connecting member and the second connecting member; wherein the first connecting member comprises two first connecting assemblies arranged opposite to each other, the first connecting assembly comprises a first connecting rod and a clamping mechanism arranged at one end of the first connecting rod; the other ends of the two first connecting rods are hingedly connected by a first screw arranged longitudinally, and the first screw is arranged axially perpendicular to the first connecting rod;

[0007] The second connecting member includes a wheel connecting assembly and a second connecting assembly connected to the wheel connecting assembly, the second connecting assembly includes two second connecting rods arranged opposite to each other, one end of the second connecting rod is hinged to the wheel connecting assembly; the other ends of the two second connecting rods are hinged to each other through a second screw arranged longitudinally, and the second screw is arranged axially perpendicular to the second connecting rod;

[0008] The third connecting member is hinged to the first screw rod and the second screw rod respectively.

[0009] Furthermore, the clamping mechanism includes a gripper and a third screw, one end of the third screw is connected to the gripper, and the other end is radially movable and penetrated in the first connecting rod along the first connecting rod, and the third screw can rotate around the axial direction of the third screw in the first connecting rod.

[0010] Furthermore, the gripper comprises two clamping jaws hinged to each other at one end, and an adjusting screw for adjusting the opening size of the two clamping jaws is screwed between the two clamping jaws;

[0011] One end of the third screw is fixedly connected to one of the clamping jaws.

[0012] Further, the wheel connection assembly comprises two wheel connection modules arranged opposite to each other and a spacing adjustment module connected between the two wheel connection modules and used for adjusting the spacing between the two wheel connection modules; wherein the wheel connection module comprises a fixing rope for connecting with the wheelchair frame, a load-bearing plate and a plurality of universal wheels arranged at the bottom of the load-bearing plate, and a clamping hole for clamping the front wheelchair wheel is provided on the upper plate surface of the load-bearing plate;

[0013] The spacing adjustment module is connected between the two load-bearing plates;

[0014] The two second connecting rods are hinged to the two load-bearing plates respectively.

[0015] Furthermore, one end of the clamping hole has a guide groove, and the guide groove is openly arranged away from one end of the second screw rod.

[0016] Furthermore, the inlet end of the guide groove has a guide opening of a trapezoidal structure, and the width dimension of the guide opening at one end close to the clamping hole is smaller than the width dimension at one end away from the clamping hole;

[0017] The bottom surface of the guide opening is an inclined surface, and an end of the inclined surface close to the clamping hole is inclined higher than an end away from the clamping hole.

[0018] Furthermore, the spacing adjustment module includes two adjustable tensioners arranged side by side, and both ends of the adjustable tensioners are fixedly connected to the load-bearing plate respectively.

[0019] Furthermore, one end of the fixing rope is connected to the load-bearing plate through a hook, and the other end is connected to the middle part of one of the adjustable tensioners through a hook.

[0020] Furthermore, one end of the load-bearing plate away from the spacing adjustment module has a protrusion extending outward.

[0021] Furthermore, the third connecting member includes a third connecting rod and rod end joint bearings connected to both ends of the third connecting rod, and the third connecting rod is hinged to the first screw rod and the second screw rod respectively through the rod end joint bearings at both ends.

[0022] The beneficial effects of the present invention are embodied in:

[0023] The multiple wheelchair quick-connection flexible traction device provided by the present invention can quickly connect multiple wheelchairs in series in sequence, and only two caregivers are needed to push the connected multiple wheelchairs at the same time. When an emergency occurs, the transfer speed of people with mobility impairments can be significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic structural diagram of a multiple wheelchair quick connection flexible traction device provided by an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of a first connecting member provided in an embodiment of the present invention;

[0026] Figure 3 A schematic diagram of the structure of a clamping mechanism provided by an embodiment of the present invention;

[0027] Figure 4 A schematic diagram of the structure of the second connecting member provided in an embodiment of the present invention Figure 1 ;

[0028] Figure 5 A schematic diagram of the structure of the second connecting member provided in an embodiment of the present invention Figure 2 ;

[0029] Figure 6 A schematic diagram of the structure of a wheel connection assembly provided in an embodiment of the present invention Figure 1 ;

[0030] Figure 7 A schematic diagram of the structure of a wheel connection assembly provided in an embodiment of the present invention Figure 2 ;

[0031] Figure 8 A schematic diagram of the structure of a load-bearing plate provided in an embodiment of the present invention;

[0032] Fig. 9 A schematic diagram of the structure of a second connection component provided in an embodiment of the present invention;

[0033] Fig.10 A schematic structural diagram of a third connecting member provided in an embodiment of the present invention;

[0034] Fig.11 Schematic diagram of the use of the multi-wheelchair quick connection flexible traction device provided by the embodiment of the present invention Figure 1 ;

[0035] Fig.12 Schematic diagram of the use of the multi-wheelchair quick connection flexible traction device provided by the embodiment of the present invention Figure 2 .

[0036] Among them, the first connecting member 1, the second connecting member 2, the third connecting member 3, the fixing rope 4, the first connecting rod 5, the clamping mechanism 6, the first screw 7, the wheel connecting assembly 8, the second connecting rod 9, the second screw 10, the third screw 11, the clamping claw 12, the adjusting screw 13, the load-bearing plate 14, the universal wheel 15, the clamping hole 16, the guide groove 17, the guide port 18, the adjustable tensioner 19, the hook 20, the third connecting rod 21, the rod end joint bearing 22, the connecting shaft 23, the buffer block 24, the arc surface 25, the mounting hole 26, and the protrusion 27. DETAILED DESCRIPTION

[0037] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer based on the following description. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0038] like Figure 1 As shown, an embodiment of the present invention provides a multiple wheelchair quick connection flexible traction device, which is used to quickly connect multiple wheelchairs in series. After the multiple wheelchairs are connected in series, only one caregiver needs to pull the first wheelchair in front and another caregiver needs to push the last wheelchair at the rear end to move all the wheelchairs in series. When an emergency occurs, it can significantly improve the transfer speed of people with mobility problems. The structure of the device when connecting the front and rear wheelchairs is as follows Fig.11 and Fig.12 shown.

[0039] Specifically, Figure 1 As shown, the multi-wheelchair quick connection flexible traction device includes a first connection member 1 for connecting the front wheelchair, a second connection member 2 for connecting the rear wheelchair, and a third connection member 3 for connecting the first connection member 1 and the second connection member 2. It can be understood that the "front wheelchair" and "rear wheelchair" mentioned in this embodiment are based on the order relationship, and the "front wheelchair" and "rear wheelchair" refer to two wheelchairs adjacent to each other.

[0040] Among them, Figure 2 As shown, the first connecting member 1 includes two first connecting assemblies arranged opposite to each other, and the first connecting assembly includes a first connecting rod 5 and a clamping mechanism 6 arranged at one end of the first connecting rod 5. The other ends of the two first connecting rods 5 are hinged by a longitudinally arranged first screw rod 7, and the first screw rod 7 is arranged axially perpendicular to the first connecting rod 5.

[0041] The other ends of the two first connecting rods 5 are hinged by a longitudinally arranged first screw rod 7, so that the opening angle between the two first connecting rods 5 can be adjusted conveniently, thereby adapting to the connection requirements of wheelchairs of different widths.

[0042] The clamping mechanism 6 is used to clamp and fix the frame of the front wheelchair. Figure 3 As shown, the clamping mechanism 6 includes a gripping clamp and a third screw 11. One end of the third screw 11 is connected to the gripping clamp, and the other end is radially movable along the first connecting rod 5 and is inserted into the first connecting rod 5. The third screw 11 can rotate axially around the third screw 11 in the first connecting rod 5, so that the inclination angle of the first connecting rod 5 can be adjusted during actual installation.

[0043] The clamp includes two clamping jaws 12 hinged at one end, and an adjusting screw 13 is screwed between the two clamping jaws 12 for adjusting the opening size of the two clamping jaws 12. One end of the third screw 11 is fixedly connected to one of the clamping jaws 12.

[0044] In specific implementation, a connecting shaft 23 is rotatably mounted in the middle of the two clamping jaws 12, and an adjusting screw 13 is radially inserted into the two connecting shafts 23 and is threadedly connected to the two connecting shafts 23. By turning the adjusting screw 13, the size of the opening between the two clamping jaws 12 can be adjusted to achieve a firm grip on frames of different diameters.

[0045] like Figure 4 and Figure 5 As shown, the second connecting member 2 includes a wheel connecting assembly 8 and a second connecting assembly connected to the wheel connecting assembly 8, and the second connecting assembly includes two second connecting rods 9 arranged opposite to each other, and one end of the second connecting rod 9 is hinged to the wheel connecting assembly 8. The other ends of the two second connecting rods 9 are hinged by a longitudinally arranged second screw rod 10, and the second screw rod 10 is arranged axially perpendicular to the second connecting rod 9.

[0046] Specifically, Figure 6 and Figure 7 As shown, the wheel connection assembly 8 includes two wheel connection modules arranged opposite to each other and a spacing adjustment module connected between the two wheel connection modules for adjusting the spacing between the two wheel connection modules. The wheel connection module includes a fixing rope 4 for connecting to the wheelchair frame, a load-bearing plate 14 and a plurality of universal wheels 15 arranged at the bottom of the load-bearing plate 14, and a clamping hole 16 for clamping the front wheelchair wheel is provided on the upper plate surface of the load-bearing plate 14.

[0047] In this embodiment, Figure 8 As shown, the clamping hole 16 is a rectangular structure, the length of the clamping hole 16 is smaller than the diameter of the front wheel of the wheelchair, and the width of the clamping hole 16 is slightly larger than the width of the front wheel of the wheelchair, so that the front wheel of the wheelchair can be clamped in the clamping hole 16. In order to reduce the deformation of the front wheel of the wheelchair after being clamped in the clamping hole 16, both ends of the clamping hole 16 have arc surfaces 25, and the wheel surface of the front wheel of the wheelchair fits the arc surfaces 25.

[0048] When the front wheel of the rear wheelchair is stuck in the hole 16, the front wheel of the rear wheelchair is off the ground, and the universal wheel 15 at the bottom of the load-bearing plate 14 contacts the ground and moves through the universal wheel 15. In this embodiment, the universal wheel 15 is a ball-type universal wheel. The ball-type universal wheel replaces the front wheel of the rear wheelchair, and as the load-bearing plate 14 is pulled by the second connecting rod 9, the ball-type universal wheel can adapt to movements in different directions.

[0049] Furthermore, in order to facilitate the front wheel of the rear wheelchair to be quickly inserted into the locking hole 16, a guide groove 17 is provided at one end of the locking hole 16, and the end of the guide groove 17 away from the second screw 10 is open. In order to facilitate the front wheel to quickly enter the guide groove 17, a guide opening 18 with a trapezoidal structure is provided at the entrance end of the guide groove 17, and the width dimension of the guide opening 18 at the end close to the locking hole 16 is smaller than the width dimension of the end away from the locking hole 16, and the bottom surface of the guide opening 18 is an inclined surface, and the end of the inclined surface close to the locking hole 16 is higher than the end away from the locking hole 16.

[0050] The spacing adjustment module is connected between the two load-bearing plates 14, and can adapt to different wheelchair front wheel distances by adjusting the spacing between the two load-bearing plates 14. Figure 6 As shown, the spacing adjustment module includes two adjustable tensioners 19 arranged side by side, and the two ends of the adjustable tensioner 19 are fixedly connected to the bearing plate 14 by bolts. The bearing plate 14 has a mounting hole 26, and the profile of the mounting hole 26 roughly fits the profile of the end of the adjustable tensioner 19, which can limit the degree of freedom of the adjustable tensioner 19 when it cooperates with the bearing plate 14, so that the connection between the adjustable tensioner 19 and the bearing plate 14 is more stable.

[0051] In this embodiment, Figure 6 and Figure 7 As shown, one end of the fixing rope 4 is connected to the load-bearing plate 14 through a hook 20, and the other end is connected to the middle of one of the adjustable tensioners 19 through the hook 20. A hanging ear is connected to the side wall of the load-bearing plate 14, and the hook 20 is connected to the hanging ear. During installation, the fixing rope 4 is wound around the frame of the rear wheelchair, so that the front wheel of the rear wheelchair is tightly controlled in the clamping hole 16.

[0052] And, if Figure 8 As shown, one end of the load-bearing plate 14 away from the spacing adjustment module has a protrusion 27 that protrudes outward. The protrusion 27 is used to step on the load-bearing plate 14 that was originally tilted to facilitate the entry of the front wheel when installing the front wheel.

[0053] The two second connecting rods 9 are respectively hinged to the two load-bearing plates 14. Fig. 9As shown, the second connecting rod 9 is hinged to the load-bearing plate 14 through two series-connected rod end joint bearings 22, or can be hinged to the load-bearing plate 14 using a universal joint, so that the load-bearing plate 14 and the second connecting rod 9 can achieve a certain relative rotation and be flexibly connected.

[0054] The third connecting member 3 is hinged to the first screw rod 7 and the second screw rod 10 respectively. Fig.10 As shown, the third connecting member 3 includes a third connecting rod 21 and a rod end joint bearing 22 connected to both ends of the third connecting rod 21. The third connecting rod 21 is respectively hinged to the first screw 7 and the second screw 10 through the rod end joint bearings 22 at both ends, so that the first connecting member 1 and the second connecting member 2 can rotate relative to each other and can also swing up and down to adapt to different motion states.

[0055] At the same time, if Figure 1 , Figure 2 , Figure 4 and Fig. 9 As shown, a buffer block 24 can be provided between the rod end joint bearing 22 and the first connecting rod 5 and the second connecting rod 9, between the two first connecting rods 5, and between the two second connecting rods 9, which can effectively reduce the friction between the parts and extend the service life of the parts. The buffer block 24 is sleeved on the first screw rod 7 and the second screw rod 10, and the buffer block 24 can be a rubber block.

[0056] In summary, the multi-wheelchair quick-connect flexible traction device provided in this embodiment can quickly connect multiple wheelchairs in series, and only two caregivers are needed to push the connected multiple wheelchairs at the same time. When an emergency occurs, the transfer speed of people with mobility impairments can be significantly improved.

[0057] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A multi-wheelchair quick-connect flexible traction device, characterized in that: include: A first connecting member (1) for connecting to a front wheelchair; a second connecting member (2) for connecting to a rear wheelchair; and A third connecting member (3) for connecting the first connecting member (1) and the second connecting member (2); wherein: The first connecting member (1) comprises two first connecting assemblies arranged opposite to each other, the first connecting assembly comprising a first connecting rod (5) and a clamping mechanism (6) arranged at one end of the first connecting rod (5); the other ends of the two first connecting rods (5) are hingedly connected by a first screw rod (7) arranged longitudinally, and the first screw rod (7) is arranged axially perpendicular to the first connecting rod (5); The second connecting member (2) comprises a wheel connecting assembly (8) and a second connecting assembly connected to the wheel connecting assembly (8), the second connecting assembly comprising two second connecting rods (9) arranged opposite to each other, one end of the second connecting rod (9) being hinged to the wheel connecting assembly (8); the other ends of the two second connecting rods (9) being hinged to each other via a longitudinally arranged second screw rod (10), the second screw rod (10) being axially perpendicular to the second connecting rod (9); The third connecting member (3) is hingedly connected to the first screw rod (7) and the second screw rod (10) respectively.

2. A multiple wheelchair quick connection flexible traction device as claimed in claim 1, characterized in that: The clamping mechanism (6) comprises a gripping clamp and a third screw rod (11); one end of the third screw rod (11) is connected to the gripping clamp, and the other end of the third screw rod (11) is movably arranged in the first connecting rod (5) along the radial direction of the first connecting rod (5); the third screw rod (11) can rotate axially around the third screw rod (11) in the first connecting rod (5).

3. A multiple wheelchair quick connection flexible traction device as claimed in claim 2, characterized in that: The gripper comprises two clamping jaws (12) hinged to each other at one end, and an adjusting screw (13) is screwed between the two clamping jaws (12) for adjusting the opening size of the two clamping jaws (12); One end of the third screw rod (11) is fixedly connected to one of the clamping jaws (12).

4. A multiple wheelchair quick connection flexible traction device as claimed in claim 1, characterized in that: The wheel connection assembly (8) comprises two wheel connection modules arranged opposite to each other and a spacing adjustment module connected between the two wheel connection modules and used for adjusting the spacing between the two wheel connection modules; wherein: The wheel connection module comprises a fixing rope (4) for connecting to a wheelchair frame, a load-bearing plate (14), and a plurality of universal wheels (15) arranged at the bottom of the load-bearing plate (14); the upper plate surface of the load-bearing plate (14) is provided with a clamping hole (16) for clamping the front wheel of the wheelchair; The spacing adjustment module is connected between the two load-bearing plates (14); The two second connecting rods (9) are respectively hinged to the two load-bearing plates (14).

5. A multiple wheelchair quick connection flexible traction device as claimed in claim 4, characterized in that: One end of the clamping hole (16) is provided with a guide groove (17), and the guide groove (17) is openly arranged away from one end of the second screw rod (10).

6. A multiple wheelchair quick connection flexible traction device as claimed in claim 5, characterized in that: The inlet end of the guide groove (17) has a guide opening (18) in a trapezoidal structure, and the width of the guide opening (18) at one end close to the clamping hole (16) is smaller than the width at one end away from the clamping hole (16); The bottom surface of the guide opening (18) is an inclined surface, and the end of the inclined surface close to the clamping hole (16) is inclined higher than the end away from the clamping hole (16).

7. A multiple wheelchair quick connection flexible traction device as claimed in claim 4, characterized in that: The spacing adjustment module comprises two adjustable tensioners (19) arranged side by side, and the two ends of the adjustable tensioner (19) are respectively fixedly connected to the load-bearing plate (14).

8. A multiple wheelchair quick connection flexible traction device as claimed in claim 7, characterized in that: One end of the fixing rope (4) is connected to the load-bearing plate (14) through a hook (20), and the other end is connected to the middle part of one of the adjustable tensioners (19) through a hook (20).

9. The multiple wheelchair quick connection flexible traction device as claimed in claim 4, characterized in that: One end of the load-bearing plate (14) away from the spacing adjustment module has a protruding portion (27) extending outward.

10. The multiple wheelchair quick connection flexible traction device according to claim 1, characterized in that: The third connecting member (3) comprises a third connecting rod (21) and rod end joint bearings (22) connected to both ends of the third connecting rod (21); the third connecting rod (21) is respectively hinged to the first screw rod (7) and the second screw rod (10) via the rod end joint bearings (22) at both ends.

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