Rope tightening device for device installed on wheelchair accessible vehicle

Abstract

The invention relates to the technical field of wheelchair accessible vehicle wheelchair lifting and fixing devices, in particular to a rope tightening device for a wheelchair accessible vehicle loading device, which comprises a bottom plate and a housing which can be connected with each other to form a mounting cavity, and the housing is provided with a rope through groove for a rope to penetrate through; the tail end of the rope is connected with a wheelchair connecting piece; a push-pull rod is arranged in the mounting cavity, wire coil assemblies are symmetrically arranged on the two sides of the push-pull rod, and the rope is wound around the wire coil assemblies; the wire coil assembly is movably connected with the bottom plate, the wire coil assembly is connected with the push-pull rod through a wire coil loosening and driving assembly, and the wire coil loosening and driving assembly is movably connected with the push-pull rod; and the push-pull rod is driven by a push-pull rod driving module to do horizontal telescopic movement. The rope tightening device is compact in structure, the rope can be accurately controlled to be unwound and wound, the wheelchair is bound and tightened, and reliable safety guarantee is provided for getting on and getting off a wheelchair user.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting and fixing devices for wheelchairs in welfare vehicles, and in particular to a rope tightening device for a mounting device in a welfare vehicle. Background Art

[0002] A welfare vehicle attachment device refers to special equipment installed to facilitate the boarding and alighting of vehicles by people with limited mobility, such as the elderly and disabled. It primarily includes welfare seats, wheelchair lifts, and folding guides. Regarding wheelchair lifts, Chinese utility model patent publication number CN212220079U discloses a welfare vehicle attachment device comprising a fixed seat secured to the vehicle floor, located in a position corresponding to the rear cover. The fixed seat is equipped with a running board mechanism for supporting a wheelchair. This running board mechanism is driven by a translational drive mechanism for horizontal telescopic movement and by a swing arm mechanism for non-vertical lifting and lowering movement. The swing arm mechanism and translational drive mechanism are controlled by a central control system. This device is easy to operate and highly safe during use. It enables the simultaneous transport of people and wheelchairs, and is compatible with most wheelchairs on the market.

[0003] Regarding how to keep a wheelchair carrying a person firmly on the walking board mechanism, paragraph

[0034] of the specification of the disclosed scheme provides a wheelchair locking mechanism, specifically: a wheelchair locking mechanism is provided at the central position of the walking board, and the wheelchair locking mechanism includes a hook for hooking the wheelchair, and a steel wire rope is connected to the end of the hook. The steel wire rope is connected to a locking handle via a monorail pulley. By pulling the locking handle, the hook can be tightened, thereby achieving the purpose of fixing the wheelchair wheels.

[0004] This solution uses a locking handle connected to one end of a wire rope, and the other end of the wire rope is connected to a hook via a monorail pulley. The locking handle controls the retraction and extension of the wire rope. When the wire rope is in a relaxed state, it is easy to operate the hook to hook the wheelchair support frame at the bottom of the wheelchair. When tightened, the wire rope is kept taut, and the hook is firmly hooked to the wheelchair support frame at the bottom of the wheelchair, so that it stays firmly on the upper device. However, since the locking handle is directly connected to the wire rope, there are strict restrictions on the length of the wire rope. If the wire rope is too long, it cannot be effectively tightened, resulting in the wire rope being unable to be straightened and the hook being in a taut state. If the wire rope is too short, it is inconvenient for the operator to use the hook to hook the support frame at the bottom of wheelchairs of different specifications.

[0005] Therefore, a new technical solution is urgently needed to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to overcome the problems of the above-mentioned prior art and provide a rope tightening device for a welfare vehicle upper device to solve the current method of directly connecting the locking handle and the steel wire rope, which has strict restrictions on the length of the steel wire rope. If the steel wire rope is too long, it cannot be effectively tightened, resulting in the steel wire rope being unable to be straightened and the hook being in a taut state; if the steel wire rope is too short, it is inconvenient for the operator to use the hook to hook the support frame at the bottom of wheelchairs of different specifications. Technical problem.

[0007] The above objectives are achieved through the following technical solutions: A rope tightening device for a welfare vehicle upper device comprises a base plate and a cover shell which can be connected to each other to form an installation cavity, the cover shell being provided with a rope through-groove for a rope to pass through; the end of the rope is connected to a wheelchair connector; a push-pull rod is provided in the installation cavity, and a wire drum assembly is symmetrically provided on both sides of the push-pull rod, and the rope is wound on the wire drum assembly; the wire drum assembly is movably connected to the base plate, and the wire drum assembly is connected to the push-pull rod via a wire drum tensioning and driving assembly, and the wire drum tensioning and driving assembly is movably connected to the push-pull rod; the push-pull rod is driven by a push-pull rod driving module to perform horizontal telescopic movement.

[0008] Furthermore, the wire drum assemblies are four, including a first wire drum assembly and a second wire drum assembly arranged on the left side of the push-pull rod, and a third wire drum assembly and a fourth wire drum assembly arranged on the right side of the push-pull rod; under the drive of the wire drum tensioning and driving assembly, the first wire drum assembly and the second wire drum assembly rotate in the same direction, the third wire drum assembly and the fourth wire drum assembly rotate in the same direction, and the rotation direction of the first wire drum assembly and the second wire drum assembly is opposite to the rotation direction of the third wire drum assembly and the fourth wire drum assembly; the rope includes a first rope wound around the first wire drum assembly, a second rope wound around the second wire drum assembly, a third rope wound around the third wire drum assembly, and a fourth rope wound around the fourth wire drum assembly; the rope slot includes a first rope slot for the first rope to pass through, a second rope slot for the second rope to pass through, a third rope slot for the third rope to pass through, and a fourth rope slot for the fourth rope to pass through.

[0009] Furthermore, the bottom plate corresponding to the first rope slot, the bottom plate corresponding to the second rope slot, the bottom plate corresponding to the third rope slot, and the bottom plate corresponding to the fourth rope slot are respectively provided with a vertically arranged first rope guiding wheel, a second rope guiding wheel, a third rope guiding wheel and a fourth rope guiding wheel, and the first rope, the second rope, the third rope and the fourth rope extend outward through the bottom of the first rope guiding wheel, the second rope guiding wheel, the third rope guiding wheel and the fourth rope guiding wheel respectively.

[0010] Further, the first rope is wound clockwise around the first drum assembly, the second rope is wound clockwise around the second drum assembly, the third rope is wound counterclockwise around the third drum assembly, and the fourth rope is wound counterclockwise around the fourth drum assembly.

[0011] Furthermore, the wire reel tensioning and driving assembly includes a first wire reel tensioning and driving assembly capable of acting on the first wire reel assembly, a second wire reel tensioning and driving assembly capable of acting on the second wire reel assembly, a third wire reel tensioning and driving assembly capable of acting on the third wire reel assembly, and a fourth wire reel tensioning and driving assembly capable of acting on the fourth wire reel assembly; the push-pull rod is provided with a first pin shaft capable of hingedly connecting the first wire reel tensioning and driving assembly and the third wire reel tensioning and driving assembly, and a second pin shaft capable of hingedly connecting the second wire reel tensioning and driving assembly and the fourth wire reel tensioning and driving assembly, and the first pin shaft and the second pin shaft are horizontally arranged on the push-pull rod.

[0012] Furthermore, the first wire reel assembly, the second wire reel assembly, the third wire reel assembly, and the fourth wire reel assembly are respectively movably connected to the bottom plate through a wire reel fixing plate.

[0013] Furthermore, the first wire drum assembly, the second wire drum assembly, the third wire drum assembly, and the fourth wire drum assembly have the same specifications and all include a wire drum with a wire drum groove, the wire drum includes an upper wire drum and a lower wire drum that can be connected to each other, the upper surface of the upper wire drum and the lower surface of the lower wire drum are symmetrically provided with a toothed upper boss and a toothed lower boss; the lower surface of the upper wire drum and the upper surface of the lower wire drum are symmetrically provided with an upper annular boss and a lower annular boss, and the upper annular boss and the lower annular boss are connected to each other to form the winding groove; the first wire drum tensioning and driving assembly, the second wire drum The tensioning and driving assembly, the third wire drum tensioning and driving assembly, and the fourth wire drum tensioning and driving assembly have the same specifications, and all include an upper clamping rod and a lower clamping rod that can be connected to each other to form a wire drum movable clamping cavity, and the outer ends of the upper clamping rod and the lower clamping rod are connected to each other to form an H-shaped clamping claw; the wire drum is arranged in the wire drum movable clamping cavity, and is movably connected to the clamping claw through the wire drum shaft; the wire drum movable clamping cavity is also provided with an upper lock tongue and a lower lock tongue that can engage with the toothed upper boss and the toothed lower boss, and the upper lock tongue and the lower lock tongue are fixed to the clamping claw through the lock tongue shaft.

[0014] Furthermore, a bidirectional rope clamping groove is provided on the bottom wall of the winding groove, which is used to facilitate the rope to be wound clockwise or counterclockwise along the winding groove after one end of the rope is clamped.

[0015] Furthermore, the push-pull rod driving module is any one of electric drive, hydraulic drive, pneumatic drive or manual drive.

[0016] Furthermore, the cover shell and the base plate are connected to each other to form a handle hiding groove for hiding the handle, the handle is hinged to the handle support provided on the base plate, and the handle is also hinged to one end of the stretching hinge block, and the other end of the stretching hinge block is hinged to the end of the push-pull rod.

[0017] The present invention provides a rope tightening device for a welfare vehicle upper assembly. A push-pull rod drive module drives the push-pull rod to move horizontally, indirectly driving the cable drum tension and the drive assembly to disengage, engage, or rotate relative to the cable drum assembly in the direction of retraction, thereby tightening the rope and securely holding the wheelchair on the upper assembly's running board mechanism. This rope tightening device is not only compact but also precisely controls the release and retraction of the rope, achieving both wheelchair binding and tightening, providing reliable safety for wheelchair users boarding and exiting the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a handle of a rope tightening device for a welfare vehicle upper device according to the present invention being pressed down; Figure 2A schematic diagram of pulling up the handle of a tightening rope device for a welfare vehicle upper device according to the present invention; Figure 3 The explosion of the rope tightening device for the welfare vehicle upper device of the present invention; Figure 4 This is a schematic structural diagram from a first perspective of the connection between a push-pull rod, a wire drum assembly, and a wire drum tensioning and driving assembly of a rope tightening device for a welfare vehicle upper device according to the present invention; Figure 5 This is a schematic structural diagram from a second perspective of the connection between the push-pull rod, the wire drum assembly, and the wire drum tensioning and driving assembly of the adapter plate in the rope tightening device for the welfare vehicle upper device described in the present invention; Figure 6 This is a schematic diagram of a rope attached to an adapter plate in a rope tightening device for a welfare vehicle upper mounting device according to the present invention; Figure 7 This is a schematic diagram of the coil spring connection of the electrical board in the rope tightening device for the welfare vehicle upper device according to the present invention; Figure 8 This is a schematic structural diagram from a first perspective of the connection between the wire drum assembly and the wire drum tensioning and driving assembly in a rope tightening device for a welfare vehicle upper device according to the present invention; Figure 9 This is a schematic structural diagram from a second perspective of the connection between the wire drum assembly and the wire drum tensioning and driving assembly in the rope tightening device for the welfare vehicle upper device according to the present invention; Figure 10 This is a schematic diagram from a first perspective of the engagement between a locking tongue and a wire drum in a rope tightening device for a welfare vehicle upper device according to the present invention; Figure 11 This is a schematic diagram from a second perspective showing the engagement between the locking tongue and the wire drum in the rope tightening device for a welfare vehicle upper device according to the present invention; Figure 12 This is a schematic diagram of the connection between the rope and the reel in the rope tightening device for the welfare vehicle upper device according to the present invention; Figure 13 An exploded view of the connection between the rope and the reel and the reel in a rope tightening device for a welfare vehicle upper device according to the present invention; Figure 14 This is a schematic diagram of the structure of the center line drum of a rope tightening device for a welfare vehicle upper device according to the present invention; Figure 15 This is an exploded view of the center wire drum of a rope tightening device for a welfare vehicle upper device described in the present invention.

[0019] Graphic mark: 1- bottom plate; 2- cover; 3- rope, 301- first rope, 302- second rope, 303- third rope, 304- fourth rope; 4-push-pull rod, 401-first pin, 402-second pin; 5-cable drum assembly, 501-first cable drum assembly, 502-second cable drum assembly, 503-third cable drum assembly, 504-fourth cable drum assembly, 505-cable drum slot, 506-cable drum, 507-upper cable drum, 508-lower cable drum, 509-toothed upper boss, 510-upper annular boss, 511-toothed lower boss, 512-lower annular boss, 513-coil spring mounting cavity, 514-bidirectional rope clamping groove, 515-cable drum shaft, 516-spring clamping groove; 6-cable drum tensioning and driving assembly, 601-first cable drum tensioning and driving assembly, 602-second cable drum tensioning and driving assembly, 603-third cable drum tensioning and driving assembly, 604-fourth cable drum tensioning and driving assembly, 605-upper clamping rod, 606-lower clamping rod, 607-clamping claw, 608-cable drum movable clamping cavity, 609-toothed upper boss, 610-lower lock tongue, 611-lock tongue shaft, 612-coil spring; 7-Mounting cavity; 8- Wheelchair connector; 9-rope through slot, 901-first rope through slot, 902-second rope through slot, 903-third rope through slot, 904-fourth rope through slot; 10-first rope guide pressure wheel, 11-second rope guide pressure wheel, 12-third rope guide pressure wheel, 13-fourth rope guide pressure wheel, 14-handle, 15-handle hidden groove, 16-handle support, 17-stretching hinge block, 18-limiting cover, 19-reel fixing plate, 20-rope guide. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and examples. The described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort shall fall within the scope of protection of the present invention.

[0021] like Figures 1 to 5 As shown, a rope tightening device for a welfare vehicle upper device is used to be installed in the center of the walking board of the welfare vehicle upper device. When in operation, the wheelchair is located in the space above the rope tightening device. The device includes a base plate 1 and a cover 2 that can be connected to each other to form a mounting cavity 7. The cover 2 is provided with a rope groove 9 for a rope 3 to pass through; the end of the rope 3 is connected to a wheelchair connector 8. A push-pull rod 4 is provided in the installation cavity 7, and a wire drum assembly 5 is symmetrically provided on both sides of the push-pull rod 4, and the rope 3 is wound around the wire drum assembly 5; the wire drum assembly 5 is movably connected to the bottom plate 1, and the wire drum assembly 5 is connected to the push-pull rod 4 through a wire drum tensioning and driving assembly 6, and the wire drum tensioning and driving assembly 6 is movably connected to the push-pull rod 4; The push-pull rod 4 is driven by the push-pull rod driving module to perform horizontal telescopic movement, including: Drive the push-pull rod 4 to perform a contraction movement: at this time, the push-pull rod 4 drives the tension of the wire drum and the drive assembly 6 to separate from the wire drum assembly 5, and the wire drum assembly 5 is in a free movable state. Under the action of external tension, it is used to release the rope 3 wound on the wire drum assembly 5 outward, so as to facilitate the connection of the wheelchair connector 8 with wheelchairs of different specifications; in this embodiment, the wheelchair connector 8 is preferably a hook; and the rope 3 is preferably a steel wire rope.

[0022] Driving the push-pull rod 4 to extend: During this process, the push-pull rod 4 first drives the cable drum to tighten and engage the drive assembly 6 with the cable drum assembly 5, then drives the cable drum assembly 5 to rotate in the opposite direction, recovering the released cable 3 and wrapping it around the cable drum assembly 5, thereby tightening the cable 3 inward. This in turn facilitates the wheelchair connector 8 to securely stabilize the wheelchair on the upper structure. If the released cable 3 is relatively long, the push-pull rod 4 is repeatedly driven to extend and retract, thereby intermittently driving the cable drum assembly 5 in the opposite direction, ultimately tightening the cable 3.

[0023] In this embodiment, there are four wire drum assemblies 5, including a first wire drum assembly 501 and a second wire drum assembly 502 arranged on the left side of the push-pull rod 4, and a third wire drum assembly 503 and a fourth wire drum assembly 504 arranged on the right side of the push-pull rod 4; under the drive of the wire drum tensioning and driving assembly 6, the first wire drum assembly 501 and the second wire drum assembly 502 rotate in the same direction, the third wire drum assembly 503 and the fourth wire drum assembly 504 rotate in the same direction, and the rotation direction of the first wire drum assembly 501 and the second wire drum assembly 502 is opposite to the rotation direction of the third wire drum assembly 503 and the fourth wire drum assembly 504; The rope 3 includes a first rope 301 wound around the first wire drum assembly 501, a second rope 302 wound around the second wire drum assembly 502, a third rope 303 wound around the third wire drum assembly 503, and a fourth rope 304 wound around the fourth wire drum assembly 504; The rope passage 201 includes a first rope passage 901 for the first rope 301 to pass through, a second rope passage 902 for the second rope 302 to pass through, a third rope passage 903 for the third rope 303 to pass through, and a fourth rope passage 904 for the fourth rope 304 to pass through.

[0024] like Figure 6 As shown, specifically, this embodiment sets four ropes 3, wherein the first rope 301 and the third rope 303 are used for the front wheelchair support frame at the bottom of the wheelchair, while the second rope 302 and the fourth rope 304 are used for the rear wheelchair support frame at the bottom of the wheelchair, thereby finally achieving stable fixation of the wheelchair.

[0025] In this embodiment, a first rope guide pressure wheel 10, a second rope guide pressure wheel 11, a third rope guide pressure wheel 12 and a fourth rope guide pressure wheel 13 are respectively provided on the base plate 1 corresponding to the first rope slot 901, the base plate 1 corresponding to the second rope slot 902, the base plate 1 corresponding to the third rope slot 903, and the base plate 1 corresponding to the fourth rope slot 904. The first rope 301, the second rope 302, the third rope 303 and the fourth rope 304 extend outward from the bottom of the first rope guide pressure wheel 10, the second rope guide pressure wheel 11, the third rope guide pressure wheel 12 and the fourth rope guide pressure wheel 13, respectively, and their respective ends are connected to the wheelchair connector 8.

[0026] By means of the limitation of this structure, the rope 3 connected to the wheelchair connector 8 can be better guided for retraction and extension.

[0027] On the other hand, in order to prevent the wheelchair connector 8 connected to the end of each rope from entering the installation cavity 7 when the rope 3 is contracted, the diameter of the rope groove 9 in this embodiment is smaller than the outer diameter of the wheelchair connector 8, but larger than the outer diameters of the first rope guide pressure wheel 10, the second rope guide pressure wheel 11, the third rope guide pressure wheel 12 and the fourth rope guide pressure wheel 13, and each rope guide pressure wheel can be partially exposed from the cover 2.

[0028] The first rope 301 is wound clockwise around the first drum assembly 501 , the second rope 302 is wound clockwise around the second drum assembly 502 , the third rope 303 is wound counterclockwise around the third drum assembly 503 , and the fourth rope 304 is wound counterclockwise around the fourth drum assembly 504 .

[0029] like Figure 6As shown, as an optimization of this solution, in order to ensure that the first rope 301, the second rope 302, the third rope 303 and the fourth rope 304 can be stably guided from the first wire drum assembly 501, the second wire drum assembly 502, the third wire drum assembly 503, and the fourth wire drum assembly 504 to the first rope guiding wheel 10, the second rope guiding wheel 11, the third rope guiding wheel 12 and the fourth rope guiding wheel 13, this embodiment is provided with rope guides 20 between the first wire drum assembly 501 and the first rope guiding wheel 10, between the second wire drum assembly 502 and the second rope guiding wheel 11, between the third wire drum assembly 603 and the third rope guiding wheel 12, and between the fourth wire drum assembly 504 and the fourth rope guiding wheel 13.

[0030] The rope guide 20 includes but is not limited to a U-shaped guide rail with an opening facing upward, or a horizontally arranged single track wheel, etc. The U-shaped guide rail is fixedly connected to the bottom plate 1, and the single track wheel is movably connected to the bottom plate 1.

[0031] like Figure 4 and Figure 5 As shown, the wire reel tensioning and driving assembly 6 includes a first wire reel tensioning and driving assembly 601 capable of acting on the first wire reel assembly 501, a second wire reel tensioning and driving assembly 602 capable of acting on the second wire reel assembly 502, a third wire reel tensioning and driving assembly 603 capable of acting on the third wire reel assembly 503, and a fourth wire reel tensioning and driving assembly 604 capable of acting on the fourth wire reel assembly 504; The push-pull rod 4 is provided with a first pin shaft 401 capable of hingedly connecting the first wire reel tensioning and driving component 601 and the third wire reel tensioning and driving component 603, and a second pin shaft 402 capable of hingedly connecting the second wire reel tensioning and driving component 602 and the fourth wire reel tensioning and driving component 604. The first pin shaft 401 and the second pin shaft 402 are horizontally arranged on the push-pull rod 4.

[0032] Specifically, as a specific embodiment of the present scheme, the first pin shaft 401 and the second pin shaft 402 are horizontally arranged with the push-pull rod 4 and can pass through the push-pull rod 4. The upper parts of the first pin shaft 401 and the second pin shaft 402 located on the upper surface of the push-pull rod 4 are respectively used to be hinged with the third wire drum tensioning and drive component 603 and the fourth wire drum tensioning and drive component 604, while the lower parts of the first pin shaft 401 and the second pin shaft 402 located on the lower surface of the push-pull rod 4 are respectively used to be hinged with the first wire drum tensioning and drive component 601 and the second wire drum tensioning and drive component 602.

[0033] Under the above structure, by driving the horizontal extension and contraction of the push-pull rod 4, the first wire drum tensioning and driving assembly 601, the second wire drum tensioning and driving assembly 602, the third wire drum tensioning and driving assembly 603, and the fourth wire drum tensioning and driving assembly 604 hinged thereto can be synchronously driven to move synchronously. In this embodiment, it is mainly reflected in the synchronous disengagement from the wire drum assembly to facilitate rope release, and the synchronous engagement and driving with the wire drum assembly 5 to facilitate rope collection.

[0034] like Figure 3 and 6 As shown, the first wire reel assembly 501 , the second wire reel assembly 502 , the third wire reel assembly 503 , and the fourth wire reel assembly 504 are movably connected to the base plate 1 via a wire reel fixing plate 19 .

[0035] Under the action of the wire drum fixing plate 19, the position of each wire drum assembly 5 on the bottom plate is fixed and can rotate freely in this position, which is convenient for rotating under external tension when releasing the rope, and better driven by the wire drum tension and driving assembly 6 when collecting the rope.

[0036] like Figures 8 to 15 As shown, the first wire drum assembly 501, the second wire drum assembly 502, the third wire drum assembly 503, and the fourth wire drum assembly 504 have the same specifications and all include a wire drum 505 having a wire drum groove 506. The wire drum 505 includes an upper wire drum 507 and a lower wire drum 508 that can be connected to each other. The upper surface of the upper wire drum 507 and the lower surface of the lower wire drum 508 are symmetrically provided with a tooth-shaped upper boss 509 and a tooth-shaped lower boss 511. An upper annular boss 510 and a lower annular boss 512 are symmetrically provided on the lower surface of the upper wire drum 507 and the upper surface of the lower wire drum 508. The upper annular boss 510 and the lower annular boss 512 are connected to each other to form the winding groove 506. The first wire reel tensioning and driving assembly 601, the second wire reel tensioning and driving assembly 602, the third wire reel tensioning and driving assembly 603, and the fourth wire reel tensioning and driving assembly 604 have the same specifications and all include an upper clamping rod 605 and a lower clamping rod 606 that can be connected to each other to form a movable wire reel clamping cavity 608. The outer ends of the upper clamping rod 605 and the lower clamping rod 606 are connected to each other to form an H-shaped clamping claw 607. The wire drum 505 is disposed in the wire drum movable clamping cavity 608 and is movably connected to the clamping claw 607 via the wire drum shaft 515; The reel movable clamping cavity 608 is further provided with an upper lock tongue 609 and a lower lock tongue 610 that can engage with the toothed upper boss 509 and the toothed lower boss 511. The upper lock tongue 609 and the lower lock tongue 610 are fixedly connected to the clamping claw 607 via a lock tongue shaft 611.

[0037] In this embodiment, the toothed upper boss 509 and the toothed lower boss 511 have the same specifications and an outer diameter smaller than that of the upper and lower spools 507 and 508. The upper and lower locking tongues 609 and 610 have the same specifications, are hawk-beak-shaped, and are symmetrically arranged vertically. They can synchronize the disengagement, engagement, and rotation of the toothed upper and lower bosses 509 and 511.

[0038] like Figure 8 and Figure 9 As shown, it should be noted that, in this embodiment, the upper lock tongue 609 and the lower lock tongue 610 are fixedly connected to the clamping jaw 607 through the lock tongue shaft 611, that is, after being connected to the clamping jaw 607, the positions of the upper lock tongue 609 and the lower lock tongue 610 are fixed, and can drive it to synchronize with the toothed upper boss 509 and the toothed lower boss 510 during the partial rotation of the clamping jaw 607 relative to the wire drum 505, thereby facilitating the completion of rope collection.

[0039] like Figure 7 As shown, as an optimization of this solution, the upper annular boss 510 and the lower annular boss 512 in this embodiment are connected to each other to form a coil spring installation cavity 513 for installing the coil spring 612, wherein the inner spring clip of the coil spring 612 is engaged with the wire drum shaft 515, and the outer spring clip of the coil spring 612 is engaged with the spring clip groove 516 set in the coil spring installation cavity 513.

[0040] It should be noted that, in this embodiment, the upper and lower ends of the wire drum shaft 515 remain stationary after being engaged with the clamping jaw 607, the base plate 1 and the cover shell 2, and the wire drum 505 can rotate relative to the wire drum shaft 515 during the process of retracting and releasing the rope.

[0041] Therefore, the coil spring 612 described in this solution is used to give the rope 3 a certain rebound force. For example, after the rope is released, as the rope 3 drives the drum 505 to rotate, it will give a reaction force to the internal coil spring 612. When the wheelchair connector 8 at the end of the rope is connected to the wheelchair, or is not connected to the wheelchair, the drum 505 will reverse under the action of the rebound force of the coil spring and give a certain reaction force to the released rope 3, thereby achieving the purpose of tightening the rope 3.

[0042] This mechanism can effectively prevent the rope 3 from being in a loose state, and cooperates with the push-pull rod 4 in this embodiment to drive the tension of the wire drum and the driving component 6 to achieve a better rope collection effect.

[0043] like Figures 14 and 15 As shown, a bidirectional rope clamping groove 514 is further provided on the bottom wall of the winding groove 506, which is used to facilitate the rope 3 to be wound clockwise or counterclockwise along the winding groove 506 after one end of the rope 3 is clamped.

[0044] Specifically, the bidirectional rope retaining groove 514 in this embodiment is formed by the upper annular boss 510 and the lower annular boss 512 connected to each other and connected to the bottom wall of the winding groove 506. The starting end of the rope 3 can be tied into a knot or connected to a support with a larger outer diameter to ensure that it cannot move out of the bidirectional rope retaining groove 514.

[0045] In this embodiment, the push-pull rod driving module is any one of electric drive, hydraulic drive, pneumatic drive or manual drive.

[0046] Specifically, when electric drive is used, an electric push rod, a linear motor drive device or an electric cylinder can be selected.

[0047] When hydraulically driven, hydraulic cylinders, hydraulic servo drive devices or hydraulic synchronous drive devices can be selected.

[0048] When it is pneumatically driven, you can choose air cylinder, rodless cylinder, etc.

[0049] When manual, a handle can be selected.

[0050] When the push-pull rod driving module is manually driven, a handle 14 is preferably used; specifically, the cover shell 2 and the base plate 1 are connected to each other to form a handle hiding groove 15 for hiding the handle 14, and the handle 14 is hinged to the handle support 16 provided on the base plate 1, and the handle 14 is also hinged to one end of the stretching hinge block 17, and the other end of the stretching hinge block 17 is hinged to the end of the push-pull rod 4.

[0051] When the handle 14 is pulled upward, the handle 14 drives the stretching hinge block 17 to drive the push-pull rod 4 to retract; When the handle 14 is pressed downward, the handle 14 drives the stretching hinge block 17 to drive the push-pull rod 4 to extend.

[0052] It should be noted that, in order to prevent the push-pull rod 4 from being displaced too much in translation when extending, causing the wire drum tensioning and driving assembly 6 to be separated from the wire drum assembly 5, a limited cover 18 is provided in the movable connection between the wire drum tensioning and driving assembly 6 and the push-pull rod 4 in this embodiment. Figure 3 and Figure 6 As shown, the connection can be protected and the extension movement can be limited.

[0053] The above description is only for explaining the embodiments of the present invention and is not intended to limit the present invention. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rope tightening device for a welfare vehicle upper device, characterized in that , comprising a base plate (1) and a cover (2) which can be connected to each other to form a mounting cavity (7); a rope groove (9) for a rope (3) to pass through is provided on the cover (2); an end of the rope (3) is connected to a wheelchair connector (8); A push-pull rod (4) is provided in the installation cavity (7), and a wire drum assembly (5) is symmetrically provided on both sides of the push-pull rod (4), and the rope (3) is wound around the wire drum assembly (5); the wire drum assembly (5) is movably connected to the bottom plate (1), and the wire drum assembly (5) is connected to the push-pull rod (4) through a wire drum tensioning and driving assembly (6), and the wire drum tensioning and driving assembly (6) is movably connected to the push-pull rod (4); The push-pull rod (4) is driven by a push-pull rod driving module to perform horizontal telescopic movement.

2. A rope tightening device for a welfare vehicle upper device according to claim 1, characterized in that , there are four wire drum assemblies (5), including a first wire drum assembly (501) and a second wire drum assembly (502) arranged on the left side of the push-pull rod (4), and a third wire drum assembly (503) and a fourth wire drum assembly (504) arranged on the right side of the push-pull rod (4); under the drive of the wire drum tensioning and driving assembly (6), the first wire drum assembly (501) and the second wire drum assembly (502) rotate in the same direction, the third wire drum assembly (503) and the fourth wire drum assembly (504) rotate in the same direction, and the rotation direction of the first wire drum assembly (501) and the second wire drum assembly (502) is opposite to the rotation direction of the third wire drum assembly (503) and the fourth wire drum assembly (504); The rope (3) includes a first rope (301) wound around the first wire drum assembly (501), a second rope (302) wound around the second wire drum assembly (502), a third rope (303) wound around the third wire drum assembly (503), and a fourth rope (304) wound around the fourth wire drum assembly (504); The rope through groove (201) comprises a first rope through groove (901) for the first rope (301) to pass through, a second rope through groove (902) for the second rope (302) to pass through, a third rope through groove (903) for the third rope (303) to pass through, and a fourth rope through groove (904) for the fourth rope (304) to pass through.

3. A rope tightening device for a welfare vehicle upper device according to claim 2, characterized in that A first rope guide pressure wheel (10), a second rope guide pressure wheel (11), a third rope guide pressure wheel (12) and a fourth rope guide pressure wheel (13) are respectively provided on the bottom plate (1) corresponding to the first rope through groove (901), the bottom plate (1) corresponding to the second rope through groove (902), the bottom plate (1) corresponding to the third rope through groove (903), and the bottom plate (1) corresponding to the fourth rope through groove (904). The first rope (301), the second rope (302), the third rope (303) and the fourth rope (304) extend outward from the bottom of the first rope guide pressure wheel (10), the second rope guide pressure wheel (11), the third rope guide pressure wheel (12) and the fourth rope guide pressure wheel (13).

4. A rope tightening device for a welfare vehicle upper device according to claim 3, characterized in that The first rope (301) is wound clockwise around the first wire drum assembly (501), the second rope (302) is wound clockwise around the second wire drum assembly (502), the third rope (303) is wound counterclockwise around the third wire drum assembly (503), and the fourth rope (304) is wound counterclockwise around the fourth wire drum assembly (504).

5. The rope tightening device for a welfare vehicle upper device according to claim 2, characterized in that: The wire reel tensioning and driving assembly (6) comprises a first wire reel tensioning and driving assembly (601) capable of acting on the first wire reel assembly (501), a second wire reel tensioning and driving assembly (602) capable of acting on the second wire reel assembly (502), a third wire reel tensioning and driving assembly (603) capable of acting on the third wire reel assembly (503), and a fourth wire reel tensioning and driving assembly (604) capable of acting on the fourth wire reel assembly (504); The push-pull rod (4) is provided with a first pin (401) capable of hingedly connecting the first wire reel tensioning and driving component (601) and the third wire reel tensioning and driving component (603), and a second pin (402) capable of hingedly connecting the second wire reel tensioning and driving component (602) and the fourth wire reel tensioning and driving component (604), and the first pin (401) and the second pin (402) are horizontally arranged on the push-pull rod (4).

6. A rope tightening device for a welfare vehicle upper mounting device according to claim 2 or 5, characterized in that: The first wire reel assembly (501), the second wire reel assembly (502), the third wire reel assembly (503), and the fourth wire reel assembly (504) are movably connected to the bottom plate (1) via a wire reel fixing plate (19), respectively.

7. The rope tightening device for a welfare vehicle upper device according to claim 6 is characterized in that The first wire drum assembly (501), the second wire drum assembly (502), the third wire drum assembly (503), and the fourth wire drum assembly (504) have the same specifications and all include a wire drum (505) having a wire drum groove (506), the wire drum (505) including an upper wire drum (507) and a lower wire drum (508) that can be connected to each other, and the upper surface of the upper wire drum (507) and the lower surface of the lower wire drum (508) are symmetrically provided with a tooth-shaped upper boss (509) and a tooth-shaped lower boss (511); An upper annular boss (510) and a lower annular boss (512) are symmetrically provided on the lower surface of the upper wire drum (507) and the upper surface of the lower wire drum (508); the upper annular boss (510) and the lower annular boss (512) are connected to each other to form the winding groove (506); The first wire reel tensioning and driving assembly (601), the second wire reel tensioning and driving assembly (602), the third wire reel tensioning and driving assembly (603), and the fourth wire reel tensioning and driving assembly (604) have the same specifications and all include an upper clamping rod (605) and a lower clamping rod (606) that can be connected to each other to form a wire reel movable clamping cavity (608), and the outer ends of the upper clamping rod (605) and the lower clamping rod (606) are connected to each other to form an H-shaped clamping claw (607); The wire drum (505) is arranged in the wire drum movable clamping cavity (608) and is movably connected to the clamping claw (607) via the wire drum shaft (515); An upper lock tongue (609) and a lower lock tongue (610) capable of engaging with the toothed upper boss (509) and the toothed lower boss (511) are also provided in the reel movable clamping cavity (608); the upper lock tongue (609) and the lower lock tongue (610) are fixedly connected to the clamping claw (607) via a lock tongue shaft (611).

8. The rope tightening device for a welfare vehicle upper device according to claim 7, characterized in that A bidirectional rope clamping groove (514) is also provided on the bottom wall of the winding groove (506), which is used to facilitate the rope (3) to be wound clockwise or counterclockwise along the winding groove (506) after one end of the rope (3) is clamped.

9. The rope tightening device for a welfare vehicle upper device according to claim 1, characterized in that ,The push-pull rod driving module is any one of electric drive, hydraulic drive, pneumatic or manual.

10. The rope tightening device for a welfare vehicle upper device according to claim 1, characterized in that The cover shell (2) and the base plate (1) are connected to each other to form a handle hidden groove (15) for hiding the handle (14). The handle (14) is hinged to a handle support (16) provided on the base plate (1). The handle (14) is also hinged to one end of a stretching hinge block (17). The other end of the stretching hinge block (17) is hinged to the end of the push-pull rod (4).

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