A tensioning device for a utility vehicle mounting system

Abstract

This utility model relates to the technical field of wheelchair lifting and fixing devices for welfare vehicles, specifically a rope tightening device for a device mounted on a welfare vehicle. It includes a base plate and a cover that are interconnected to form a mounting cavity. The cover has a rope groove for the rope to pass through. The end of the rope is connected to a wheelchair connector. A push-pull rod is installed inside the mounting cavity, and spool assemblies are symmetrically arranged on both sides of the push-pull rod. The rope is wound around the spool assemblies. The spool assemblies are movably connected to the base plate, and the spool assemblies are connected to the push-pull rod via a spool tensioning and driving assembly, which is movably connected to the push-pull rod. The push-pull rod is driven by a push-pull rod drive module to perform horizontal telescopic movement. This rope tightening device is not only compact in structure but also allows for precise control of rope release and retraction, achieving binding and tightening of the wheelchair, providing reliable safety for wheelchair users getting on and off the vehicle.

Description

Technical Field

[0001] This utility model relates to the technical field of wheelchair lifting and fixing devices for welfare vehicles, and in particular to a rope tightening device for a device mounted on a welfare vehicle. Background Technology

[0002] Welfare vehicle superstructures refer to special equipment installed to facilitate getting on and off vehicles and riding for people with mobility impairments, such as the elderly and disabled. These mainly include welfare seats, wheelchair lifts, and folding guides. Regarding wheelchair lifts, Chinese utility model patent CN212220079U discloses a welfare vehicle superstructure, including a fixed seat fixed to the floor of the vehicle body, located at a position corresponding to the rear cover of the vehicle body. The fixed seat is equipped with a walking platform mechanism for supporting the wheelchair. This walking platform mechanism is driven by a translation drive mechanism to perform horizontal telescopic movement and by a swing arm mechanism to perform non-vertical lifting movement. The swing arm mechanism and the translation drive mechanism are controlled by a central control system. This device is easy to operate, highly safe during use, and can simultaneously transport people and wheelchairs, and is compatible with most wheelchairs on the market.

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

[0034] of the disclosed solution provides a wheelchair locking mechanism, specifically: a wheelchair locking mechanism is provided at the center of the walking board, the wheelchair locking mechanism includes a hook for hooking the wheelchair, the end of the hook is connected to a steel wire rope, the steel wire rope is connected to a locking handle via a single rail pulley, and by pulling the locking handle, the hook can be tightened, thereby achieving the purpose of fixing the wheelchair wheels.

[0004] This design connects one end of a locking handle to a steel cable, the other end of which is connected to a hook via a monorail pulley. The locking handle controls the cable's movement, allowing it to relax and engage the hook on the wheelchair support frame. When tightened, the cable is taut, securely holding the hook to the support frame and placing it stably on the superstructure. However, because the locking handle is directly connected to the cable, there are strict limitations on its length. If the cable is too long, it cannot be effectively tightened, preventing the hook from remaining taut. If the cable is too short, it is inconvenient for the operator to use the hook to engage the support frames of different wheelchair sizes.

[0005] Therefore, a new technical solution is urgently needed to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to overcome the problems of the prior art and provide a rope tightening device for a device mounted on a welfare vehicle. This device solves the problem that the current method of directly connecting the locking handle to the wire rope has strict limitations on the length of the wire rope. If the wire rope is too long, it cannot be effectively tightened, resulting in the wire rope not being straight 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 sizes.

[0007] The above objectives are achieved through the following technical solutions:

[0008] A rope tightening device for a utility vehicle includes a base plate and a cover that can be connected to each other to form a mounting cavity. The cover has a rope groove for the rope to pass through. The end of the rope is connected to a wheelchair connector. A push-pull rod is provided inside the mounting cavity. Cable reel assemblies are symmetrically arranged on both sides of the push-pull rod, and the rope is wound on the cable reel assemblies. The cable reel assemblies are movably connected to the base plate, and the cable reel assemblies are connected to the push-pull rod via a cable reel tensioning and driving assembly. The cable reel tensioning and driving assembly is movably connected to the push-pull rod. The push-pull rod is driven to move horizontally and telescopically via a push-pull rod driving module.

[0009] Furthermore, there are four coil assemblies, including a first coil assembly and a second coil assembly disposed on the left side of the push-pull rod, and a third coil assembly and a fourth coil assembly disposed on the right side of the push-pull rod; under the drive of the coil tensioning and driving assembly, the first coil assembly and the second coil assembly rotate in the same direction, and the third coil assembly and the fourth coil assembly rotate in the same direction, and the rotation direction of the first coil assembly and the second coil assembly is opposite to the rotation direction of the third coil assembly and the fourth coil assembly; the rope includes a first rope wound with the first coil assembly, a second rope wound with the second coil assembly, a third rope wound with the third coil assembly, and a fourth rope wound with the fourth coil assembly; the rope through slot includes a first rope through slot for the first rope to pass through, a second rope through slot for the second rope to pass through, a third rope through slot for the third rope to pass through, and a fourth rope through slot for the fourth rope to pass through.

[0010] Furthermore, a first rope guide roller, a second rope guide roller, a third rope guide roller, and a fourth rope guide roller are respectively provided on the base plate corresponding to the first rope through groove, the base plate corresponding to the second rope through groove, the base plate corresponding to the third rope through groove, and the base plate corresponding to the fourth rope through groove. The first rope, the second rope, the third rope, and the fourth rope extend outward from the bottom of the first rope guide roller, the second rope guide roller, the third rope guide roller, and the fourth rope guide roller, respectively.

[0011] Furthermore, the first rope is wound clockwise around the first reel assembly, the second rope is wound clockwise around the second reel assembly, the third rope is wound counterclockwise around the third reel assembly, and the fourth rope is wound counterclockwise around the fourth reel assembly.

[0012] Furthermore, the coil tensioning and driving assembly includes a first coil tensioning and driving assembly that can act on the first coil assembly, a second coil tensioning and driving assembly that can act on the second coil assembly, a third coil tensioning and driving assembly that can act on the third coil assembly, and a fourth coil tensioning and driving assembly that can act on the fourth coil assembly; the push-pull rod is provided with a first pin that can hinge the first coil tensioning and driving assembly and the third coil tensioning and driving assembly, and a second pin that can hinge the second coil tensioning and driving assembly and the fourth coil tensioning and driving assembly, and the first pin and the second pin are horizontally arranged on the push-pull rod.

[0013] Furthermore, the first reel assembly, the second reel assembly, the third reel assembly, and the fourth reel assembly are movably connected to the base plate via reel fixing plates.

[0014] Furthermore, the first, second, third, and fourth reel assemblies are identical in specifications, each including a reel with a reel groove. Each reel comprises an upper reel and a lower reel that can be connected to each other. The upper surface of the upper reel and the lower surface of the lower reel are symmetrically provided with toothed upper and lower bosses. The lower surface of the upper reel and the upper surface of the lower reel are symmetrically provided with upper and lower annular bosses, which connect to form the reel groove. The first reel tensioning and driving assembly and the second reel... The tensioning and driving assembly, the third coil tensioning and driving assembly, and the fourth coil tensioning and driving assembly are identical in specifications. They all include an upper clamping rod and a lower clamping rod that can be connected to each other to form a movable clamping cavity for the coil. The outer ends of the upper clamping rod and the lower clamping rod are connected to each other to form an H-shaped gripper. The coil is disposed in the movable clamping cavity for the coil and is movably connected to the gripper through a coil shaft. The movable clamping cavity for the coil is also provided with an upper locking tongue and a lower locking tongue that can engage with the toothed upper boss and the toothed lower boss. The upper locking tongue and the lower locking tongue are fixedly connected to the gripper through a locking tongue shaft.

[0015] Furthermore, a bidirectional rope-locking groove is provided on the bottom wall of the coil groove, which facilitates the rope to be wound clockwise or counterclockwise along the coil groove after one end of the rope is locked.

[0016] Furthermore, the push-pull rod drive module can be any one of electric drive, hydraulic drive, pneumatic drive, or manual drive.

[0017] Furthermore, after the cover and the base plate are connected to each other, a handle hiding groove is formed for the handle to be hidden. The handle is hinged to a handle support provided on the base plate. The handle is also hinged to one end of a tension hinge block. The other end of the tension hinge block is hinged to the end of the push-pull rod.

[0018] This utility model provides a rope tightening device for a wheelchair superstructure. A push-pull rod drive module drives a push-pull rod to move horizontally, indirectly affecting the tension of the cable reel and causing the drive assembly to rotate relative to the reel assembly (either disengaging, engaging, or rotating in the direction of rope reel winding). This tightens the rope, thus securing the wheelchair stably on the superstructure's walking platform mechanism. This rope tightening device is not only compact but also precisely controls the release and retraction of the rope, achieving effective binding and tightening of the wheelchair, providing reliable safety for wheelchair users getting on and off the vehicle. Attached Figure Description

[0019] Figure 1 This is a schematic diagram showing the handle of a rope tightening device for a welfare vehicle as described in this utility model being pressed down;

[0020] Figure 2 This is a schematic diagram showing the handle of a rope tightening device for a welfare vehicle as described in this utility model.

[0021] Figure 3 The explosion of the tensioning device for a welfare vehicle mounting device described in this utility model;

[0022] Figure 4 This is a first-view structural diagram of the connection between the push-pull rod, the cable reel assembly, and the cable reel tensioning and drive assembly of the cable tensioning device for a welfare vehicle mounting device according to the present invention.

[0023] Figure 5 This is a second-view structural diagram of the connection between the push-pull rod, the cable reel assembly, and the cable reel tensioning and drive assembly in the cable tensioning device for a welfare vehicle mounting device according to the present invention.

[0024] Figure 6 This is a schematic diagram of the rope-bearing adapter plate in a rope-tightening device for a welfare vehicle as described in this utility model;

[0025] Figure 7 This is a schematic diagram of the coil spring connection of the electrical board in the rope tightening device for a welfare vehicle mounting device described in this utility model;

[0026] Figure 8 This is a first-view structural diagram of the connection between the cable reel assembly and the cable reel tensioning and drive assembly in a cable tightening device for a welfare vehicle mounting device according to the present invention.

[0027] Figure 9 This is a second-view structural diagram showing the connection between the cable reel assembly and the cable reel tensioning and drive assembly in a cable tightening device for a welfare vehicle mounting device according to the present invention.

[0028] Figure 10 This is a first-view schematic diagram of the locking tongue engaging with the cable reel in a rope tightening device for a welfare vehicle mounting device according to the present invention;

[0029] Figure 11 This is a second-view schematic diagram of the locking tongue engaging with the cable reel in a rope tightening device for a welfare vehicle mounting device according to the present invention;

[0030] Figure 12 This is a schematic diagram showing the connection between the rope and the reel in a rope tightening device for a welfare vehicle mounting device according to the present invention;

[0031] Figure 13 This is an exploded view of the rope connection to the reel and the reel in a rope tightening device for a welfare vehicle mounting device according to the present invention.

[0032] Figure 14This is a schematic diagram of the cable reel structure of a tensioning device for a welfare vehicle mounting device according to the present invention;

[0033] Figure 15 This is an exploded view of the centerline reel of a rope tightening device for a welfare vehicle as described in this utility model.

[0034] Illustration markings:

[0035] 1-Base plate;

[0036] 2-Casing;

[0037] 3-Rope, 301-First rope, 302-Second rope, 303-Third rope, 304-Fourth rope;

[0038] 4-Push-pull rod, 401-First pin, 402-Second pin;

[0039] 5-Wire reel assembly, 501-First wire reel assembly, 502-Second wire reel assembly, 503-Third wire reel assembly, 504-Fourth wire reel assembly, 505-Wire reel, 506-Wire reel groove, 507-Upper wire reel, 508-Lower wire reel, 509-Toothed upper boss, 510-Upper annular boss, 511-Toothed lower boss, 512-Lower annular boss, 513-Spring mounting cavity, 514-Bidirectional rope clamping groove, 515-Wire reel shaft, 516-Spring clamping groove;

[0040] 6-Wire reel tensioning and driving assembly, 601-First wire reel tensioning and driving assembly, 602-Second wire reel tensioning and driving assembly, 603-Third wire reel tensioning and driving assembly, 604-Fourth wire reel tensioning and driving assembly, 605-Upper clamping rod, 606-Lower clamping rod, 607-Gripper, 608-Wire reel movable clamping cavity, 609-Toothed upper boss, 610-Lower locking tongue, 611-Locking tongue shaft, 612-Coil spring;

[0041] 7-Installation cavity;

[0042] 8-Wheelchair connector;

[0043] 9-Rope through groove, 901-First rope through groove, 902-Second rope through groove, 903-Third rope through groove, 904-Fourth rope through groove;

[0044] 10-First rope guide roller, 11-Second rope guide roller, 12-Third rope guide roller, 13-Fourth rope guide roller, 14-Handle, 15-Handle concealed groove, 16-Handle support, 17-Tension hinge block, 18-Limit cover, 19-Rope reel fixing plate, 20-Rope guide component. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0046] like Figures 1-5 As shown, a rope tightening device for a welfare vehicle superstructure is installed at the center of the walking plate of the welfare vehicle superstructure. When in operation, the wheelchair is located in the space above it. It 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.

[0047] A push-pull rod 4 is provided in the mounting cavity 7. A coil assembly 5 is symmetrically arranged on both sides of the push-pull rod 4. The rope 3 is wound on the coil assembly 5. The coil assembly 5 is movably connected to the base plate 1. The coil assembly 5 and the push-pull rod 4 are connected by a coil tensioning and driving assembly 6. The coil tensioning and driving assembly 6 is movably connected to the push-pull rod 4.

[0048] The push-pull rod 4 is driven by the push-pull rod drive module to perform horizontal telescopic movement, including:

[0049] The push-pull rod 4 is driven to retract: at this time, the push-pull rod 4 causes the tension and loosening of the spool and the drive assembly 6 to separate from the spool assembly 5. The spool assembly 5 is in a free-moving state. Under the action of external pulling force, it is used to release the rope 3 wound on the spool 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.

[0050] The push-pull rod 4 extends: First, the push-pull rod 4 engages and locks the cable reel assembly 5 with the drive assembly 6. Then, it drives the cable reel assembly 5 to rotate in the opposite direction, retrieving the released rope 3 and winding it around the reel assembly 5, thus tightening the rope 3 inwards. This facilitates the wheelchair connector 8 in firmly securing the wheelchair to the superstructure. If the released rope 3 is long, the push-pull rod 4 is repeatedly driven to extend and retract, intermittently driving the cable reel assembly 5 to rotate in the opposite direction, ultimately tightening the rope 3.

[0051] In this embodiment, there are four coil assemblies 5, including a first coil assembly 501 and a second coil assembly 502 disposed on the left side of the push-pull rod 4, and a third coil assembly 503 and a fourth coil assembly 504 disposed on the right side of the push-pull rod 4. Under the drive of the coil tensioning and driving assembly 6, the first coil assembly 501 and the second coil assembly 502 rotate in the same direction, the third coil assembly 503 and the fourth coil assembly 504 rotate in the same direction, and the rotation direction of the first coil assembly 501 and the second coil assembly 502 is opposite to the rotation direction of the third coil assembly 503 and the fourth coil assembly 504.

[0052] The rope 3 includes a first rope 301 wound with the first reel assembly 501, a second rope 302 wound with the second reel assembly 502, a third rope 303 wound with the third reel assembly 503, and a fourth rope 304 wound with the fourth reel assembly 504.

[0053] The rope passage 9 includes a first rope passage 901 through which the first rope 301 passes, a second rope passage 902 through which the second rope 302 passes, a third rope passage 903 through which the third rope 303 passes, and a fourth rope passage 904 through which the fourth rope 304 passes.

[0054] like Figure 6 As shown, specifically, this embodiment uses four ropes 3, where 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, ultimately achieving stable fixation of the wheelchair.

[0055] In this embodiment, a first rope guide roller 10, a second rope guide roller 11, a third rope guide roller 12, and a fourth rope guide roller 13 are respectively provided on the base plate 1 corresponding to the first rope through groove 901, the base plate 1 corresponding to the second rope through groove 902, the base plate 1 corresponding to the third rope through groove 903, and the base 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 roller 10, the second rope guide roller 11, the third rope guide roller 12, and the fourth rope guide roller 13, respectively, and their respective ends are connected to the wheelchair connector 8.

[0056] The structure allows for better guidance in retracting and extending the rope 3 connected to the wheelchair connector 8.

[0057] On the other hand, in order to prevent the wheelchair connectors 8 connected to the ends of each rope from entering the mounting cavity 7 when the rope 3 is retracted, the diameter of the rope through groove 9 in this embodiment is smaller than the outer diameter of the wheelchair connector 8, but larger than the outer diameter of the first rope guide roller 10, the second rope guide roller 11, the third rope guide roller 12 and the fourth rope guide roller 13, and allows each rope guide roller to be partially exposed in the cover 2.

[0058] The first rope 301 is wound clockwise around the first coil assembly 501, the second rope 302 is wound clockwise around the second coil assembly 502, the third rope 303 is wound counterclockwise around the third coil assembly 503, and the fourth rope 304 is wound counterclockwise around the fourth coil assembly 504.

[0059] like Figure 6 As 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 reel assembly 501, the second reel assembly 502, the third reel assembly 503, and the fourth reel assembly 504 to the first rope guide roller 10, the second rope guide roller 11, the third rope guide roller 12, and the fourth rope guide roller 13, this embodiment provides rope guide members 20 between the first reel assembly 501 and the first rope guide roller 10, between the second reel assembly 502 and the second rope guide roller 11, between the third reel assembly 503 and the third rope guide roller 12, and between the fourth reel assembly 504 and the fourth rope guide roller 13.

[0060] The rope guide 20 includes, but is not limited to, an upward-facing U-shaped guide rail or a horizontally arranged single-track wheel. The U-shaped guide rail is fixedly connected to the base plate 1, and the single-track wheel is movably connected to the base plate 1.

[0061] like Figure 4 and Figure 5 As shown, the coil tensioning and driving assembly 6 includes a first coil tensioning and driving assembly 601 that can act on the first coil assembly 501, a second coil tensioning and driving assembly 602 that can act on the second coil assembly 502, a third coil tensioning and driving assembly 603 that can act on the third coil assembly 503, and a fourth coil tensioning and driving assembly 604 that can act on the fourth coil assembly 504;

[0062] The push-pull rod 4 is provided with a first pin 401 that can hinge the first coil tensioning and driving component 601 and the third coil tensioning and driving component 603, and a second pin 402 that can hinge the second coil tensioning and driving component 602 and the fourth coil tensioning and driving component 604. The first pin 401 and the second pin 402 are horizontally arranged on the push-pull rod 4.

[0063] Specifically, in one embodiment of this solution, the first pin 401 and the second pin 402 are horizontally arranged with the push-pull rod 4 and can pass through the push-pull rod 4. The upper half of the first pin 401 and the second pin 402 located on the upper surface of the push-pull rod 4 are respectively used to hinge with the third coil tensioning and driving assembly 603 and the fourth coil tensioning and driving assembly 604, while the lower half of the first pin 401 and the second pin 402 located on the lower surface of the push-pull rod 4 are respectively used to hinge with the first coil tensioning and driving assembly 601 and the second coil tensioning and driving assembly 602.

[0064] Under the above structure, by driving the horizontal extension and retraction of the push-pull rod 4, the first coil tensioning and driving assembly 601, the second coil tensioning and driving assembly 602, the third coil tensioning and driving assembly 603, and the fourth coil tensioning and driving assembly 604, which are hinged to it, can be driven to move synchronously. In this embodiment, this is mainly reflected in the synchronous disengagement from the coil assembly, which is convenient for releasing the rope, and the synchronous engagement and driving with the coil assembly 5, which is convenient for retracting the rope.

[0065] like Figure 3 and 6 As shown, the first coil assembly 501, the second coil assembly 502, the third coil assembly 503, and the fourth coil assembly 504 are movably connected to the base plate 1 via the coil fixing plate 19.

[0066] Under the action of the coil fixing plate 19, the position of each coil assembly 5 on the base plate remains fixed and can rotate freely in that position, which facilitates rotation caused by external tension when releasing the rope and better drives the coil tension and drive assembly 6 when retracting the rope.

[0067] like Figures 8-15 As shown, the first coil assembly 501, the second coil assembly 502, the third coil assembly 503, and the fourth coil assembly 504 have the same specifications and all include a coil 505 with a coil groove 506. The coil 505 includes an upper coil 507 and a lower coil 508 that can be connected to each other. The upper surface of the upper coil 507 and the lower surface of the lower coil 508 are symmetrically provided with toothed upper bosses 509 and toothed lower bosses 511.

[0068] The lower surface of the upper reel 507 and the upper surface of the lower reel 508 are symmetrically provided with an upper annular boss 510 and a lower annular boss 512. The upper annular boss 510 and the lower annular boss 512 are connected to each other to form the reel groove 506.

[0069] The first coil tensioning and driving assembly 601, the second coil tensioning and driving assembly 602, the third coil tensioning and driving assembly 603, and the fourth coil tensioning and driving assembly 604 have the same specifications. They all include an upper clamping rod 605 and a lower clamping rod 606 that can be connected to each other to form a movable clamping cavity 608 for the coil. 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 gripper 607.

[0070] The spool 505 is disposed in the spool movable clamping cavity 608 and is movably connected to the jaw 607 via the spool shaft 515;

[0071] The movable clamping cavity 608 of the coil is also provided with an upper locking tongue 609 and a lower locking tongue 610 that can engage with the toothed upper boss 509 and the toothed lower boss 511. The upper locking tongue 609 and the lower locking tongue 610 are fixedly connected to the gripper 607 through the locking tongue shaft 611.

[0072] In this embodiment, the toothed upper boss 509 and the toothed lower boss 511 have the same specifications, and their outer diameters are smaller than those of the upper coil 507 and the lower coil 508. The upper locking tongue 609 and the lower locking tongue 610 have the same specifications, both being eagle-beak shaped and symmetrically arranged, and can synchronously disengage, engage, and drive the rotation of the toothed upper boss 509 and the toothed lower boss 511.

[0073] like Figure 8 and Figure 9 As shown, it should be noted that in this embodiment, the upper locking tongue 609 and the lower locking tongue 610 are fixedly connected to the gripper 607 via the locking tongue shaft 611. That is, after being connected to the gripper 607, the positions of the upper locking tongue 609 and the lower locking tongue 610 are fixed and can drive the gripper 607 to work synchronously with the toothed upper boss 509 and the toothed lower boss 510 during the partial rotation of the gripper 607 relative to the coil 505, which facilitates the completion of rope winding.

[0074] like Figure 7 As shown, as an optimization of this solution, in this embodiment, the upper annular boss 510 and the lower annular boss 512 are connected to each other to form a coil spring mounting cavity 513 for mounting the coil spring 612. The inner spring clip of the coil spring 612 is engaged with the coil spool shaft 515, and the outer spring clip of the coil spring 612 is engaged with the spring clip slot 516 provided in the coil spring mounting cavity 513.

[0075] It should be noted that, in this embodiment, the upper and lower ends of the spool shaft 515 remain stationary after being engaged with the gripper 607, the base plate 1, and the cover 2, while the spool 505 can rotate relative to the spool shaft 515 during the winding and unwinding of the rope.

[0076] 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 coil 505 to rotate, it will give the internal coil spring 612 a reaction force. When the wheelchair connector 8 at the end of the rope is connected to the wheelchair or not connected to the wheelchair, the coil 505 will reverse under the action of the spring rebound force, and give the released rope 3 a certain reaction force, so as to achieve the purpose of tightening the rope 3.

[0077] This mechanism can effectively prevent the rope 3 from being in a slack state. Combined with the push-pull rod 4 driving the tension of the reel and the function of the drive component 6 in this embodiment, it can achieve a better rope winding effect.

[0078] like Figures 14-15 As shown, a bidirectional rope-locking groove 514 is also provided on the bottom wall of the coil groove 506, which is used to facilitate the coil 3 to be wound clockwise or counterclockwise along the coil groove 506 after one end of the rope 3 is locked.

[0079] Specifically, in this embodiment, the bidirectional rope-locking groove 514 is formed by the interconnection of the upper annular boss 510 and the lower annular boss 512, and then forms with the bottom wall of the coil groove 506. The starting end of the rope 3 is knotted or connected to a support with a large outer diameter to ensure that it cannot move out of the bidirectional rope-locking groove 514.

[0080] In this embodiment, the push-pull rod drive module can be any one of electric drive, hydraulic drive, pneumatic drive, or manual drive.

[0081] Specifically, when electrically driven, an electric actuator, a linear motor drive, or an electric cylinder can be selected.

[0082] When hydraulically driven, hydraulic cylinders, hydraulic servo drives, or hydraulic synchronous drives can be selected.

[0083] When pneumatically driven, cylinders, rodless cylinders, etc., can be selected.

[0084] When in manual mode, a handle can be selected.

[0085] When the push-pull rod drive module is manually driven, the handle 14 is preferred; specifically, after the cover 2 and the base plate 1 are connected to each other, a handle hiding groove 15 is formed for the handle 14 to be hidden. The handle 14 is hinged to the handle support 16 provided on the base plate 1. The handle 14 is also hinged to one end of the tension hinge block 17. The other end of the tension hinge block 17 is hinged to the end of the push-pull rod 4.

[0086] When the handle 14 is pulled upward, the handle 14 drives the tension hinge block 17 to retract the push-pull rod 4.

[0087] When the handle 14 is pressed down, the handle 14 drives the tension hinge block 17 to extend the push-pull rod 4.

[0088] It should be noted that, in order to prevent excessive translational displacement of the push-pull rod 4 during its extension movement, which could cause the coil tension to become loose or the drive assembly 6 to disengage from the coil assembly 5, this embodiment provides a limit cover 18 at the movable connection between the coil tension and drive assembly 6 and the push-pull rod 4. Figure 3 and Figure 6 As shown, this design can both protect the connection and limit the extension movement.

[0089] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A tensioning device for a utility vehicle mounting system, characterized in that... It includes a base plate (1) and a cover (2) that can be connected to each other to form an installation cavity (7). The cover (2) is provided with a rope groove (9) for the 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 mounting cavity (7). A coil assembly (5) is symmetrically arranged on both sides of the push-pull rod (4). The rope (3) is wound on the coil assembly (5). The coil assembly (5) is movably connected to the base plate (1). The coil assembly (5) and the push-pull rod (4) are connected by a coil tensioning and driving assembly (6). The coil 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 drive module to perform horizontal telescopic movement.

2. A tensioning device for a welfare vehicle mounting device according to claim 1, characterized in that... There are four coil assemblies (5), including a first coil assembly (501) and a second coil assembly (502) disposed on the left side of the push-pull rod (4), and a third coil assembly (503) and a fourth coil assembly (504) disposed on the right side of the push-pull rod (4). Under the drive of the coil tensioning and driving assembly (6), the first coil assembly (501) and the second coil assembly (502) rotate in the same direction, the third coil assembly (503) and the fourth coil assembly (504) rotate in the same direction, and the rotation direction of the first coil assembly (501) and the second coil assembly (502) is opposite to the rotation direction of the third coil assembly (503) and the fourth coil assembly (504). The rope (3) includes a first rope (301) wound with the first reel assembly (501), a second rope (302) wound with the second reel assembly (502), a third rope (303) wound with the third reel assembly (503), and a fourth rope (304) wound with the fourth reel assembly (504). The rope passage (9) includes a first rope passage (901) through which the first rope (301) passes, a second rope passage (902) through which the second rope (302) passes, a third rope passage (903) through which the third rope (303) passes, and a fourth rope passage (904) through which the fourth rope (304) passes.

3. A tensioning device for a welfare vehicle mounting device according to claim 2, characterized in that... On the base plate (1) corresponding to the first rope through groove (901), the base plate (1) corresponding to the second rope through groove (902), the base plate (1) corresponding to the third rope through groove (903), and the base plate (1) corresponding to the fourth rope through groove (904), a first rope guide roller (10), a second rope guide roller (11), a third rope guide roller (12), and a fourth rope guide roller (13) are respectively arranged vertically. 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 roller (10), the second rope guide roller (11), the third rope guide roller (12), and the fourth rope guide roller (13).

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

5. A tensioning device for a welfare vehicle mounting device according to claim 2, characterized in that, The coil tensioning and driving assembly (6) includes a first coil tensioning and driving assembly (601) that can act on the first coil assembly (501), a second coil tensioning and driving assembly (602) that can act on the second coil assembly (502), a third coil tensioning and driving assembly (603) that can act on the third coil assembly (503), and a fourth coil tensioning and driving assembly (604) that can act on the fourth coil assembly (504). The push-pull rod (4) is provided with a first pin (401) that can hinge the first coil tensioning and driving assembly (601) and the third coil tensioning and driving assembly (603), and a second pin (402) that can hinge the second coil tensioning and driving assembly (602) and the fourth coil tensioning and driving assembly (604). The first pin (401) and the second pin (402) are horizontally arranged on the push-pull rod (4).

6. A tensioning device for a welfare vehicle mounting device according to claim 2 or 5, characterized in that, The first coil assembly (501), the second coil assembly (502), the third coil assembly (503), and the fourth coil assembly (504) are movably connected to the base plate (1) via a coil fixing plate (19).

7. A tensioning device for a welfare vehicle mounting device according to claim 6, characterized in that... The first coil assembly (501), the second coil assembly (502), the third coil assembly (503), and the fourth coil assembly (504) have the same specifications and all include a coil (505) with a coil groove (506). The coil (505) includes an upper coil (507) and a lower coil (508) that can be connected to each other. The upper surface of the upper coil (507) and the lower surface of the lower coil (508) are symmetrically provided with toothed upper boss (509) and toothed lower boss (511). The lower surface of the upper coil (507) and the upper surface of the lower coil (508) are symmetrically provided with an upper annular boss (510) and a lower annular boss (512). The upper annular boss (510) and the lower annular boss (512) are connected to each other to form the coil groove (506). The first coil tensioning and driving assembly (601), the second coil tensioning and driving assembly (602), the third coil tensioning and driving assembly (603), and the fourth coil tensioning and driving assembly (604) are all of the same specification. They all include an upper clamping rod (605) and a lower clamping rod (606) that can be connected to each other to form a movable clamping cavity (608) for the coil. 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 gripper (607). The spool (505) is disposed in the spool movable clamping cavity (608) and is movably connected to the jaw (607) through the spool shaft (515); The movable clamping cavity (608) of the coil is also provided with an upper locking tongue (609) and a lower locking tongue (610) that can engage with the toothed upper boss (509) and the toothed lower boss (511). The upper locking tongue (609) and the lower locking tongue (610) are fixedly connected to the jaw (607) through the locking tongue shaft (611).

8. A tensioning device for a welfare vehicle mounting device according to claim 7, characterized in that... The bottom wall of the coil groove (506) is also provided with a two-way rope clamping groove (514), which is used to make it easier for the rope (3) to be wound clockwise or counterclockwise along the coil groove (506) after one end of the rope (3) is clamped.

9. A tensioning device for a welfare vehicle mounting device according to claim 1, characterized in that... The push-pull rod drive module can be any one of electric drive, hydraulic drive, pneumatic drive, or manual drive.

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

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