Labor-saving structure of heavy lifting sliding door

Abstract

The invention discloses a labor-saving structure of a heavy lifting sliding door. The labor-saving structure comprises a front pulley block, a rear pulley block, a transmission rod, a front connecting block, a rear connecting block and a lifting assisting device. According to the structure, the front pulley block, the rear pulley block and the transmission rod are arranged, the front pulley block and the rear pulley block can slide front and back and are connected through the transmission rod, the front connecting block and the rear connecting block, then the lifting assisting device is arranged, and a positioning screw is taken out, so that the lifting assisting device pulls the rear pulley block to move towards the front pulley block; therefore, the front pulley block and the rear pulley block generate upward moving thrust, auxiliary lifting of the sliding door is achieved, force used for lifting the sliding door can be saved, pulling force for pulling a connecting rod during lifting is greatly reduced, namely torsion during rotation of a handle is reduced, the overall structure is simple, practical and reliable, the service life of repeated opening and closing of a lock box can be prolonged, and the structure is small in size and convenient to use. And the adaptability is wide.

Description

Technical Field

[0001] The present invention relates to the technical field of hardware, and more particularly to a labor-saving structure for a heavy-duty lifting sliding door. Background Art

[0002] In the field of doors and windows, in the lifting sliding door structure, the sliding structure needs to lift the door body and overcome the weight of the door itself. For relatively large lifting sliding doors (such as 500 kg), the weight of the door body is relatively large, and it is rather strenuous for personnel to lift the door body through the handle. The door cannot be lifted lightly, affecting the user experience. To solve the above problems, a rear pulley group assisting lifting structure for a heavy-duty integrated lifting sliding door is designed. The publication number is CN1155766C, which discloses a sliding door pulley. A movable frame 20 is installed on a pulley frame 1 so as to be freely movable in the vertical direction along the length direction. On the movable frame 20, a wheel mounting member 30 is installed so as to be freely swingable up and down. A pair of wheels 40 are installed on the wheel mounting member 30. A nut member 11 is installed on the pulley frame 1. An adjusting screw 13 is screwed into a small screw hole 12 of the nut member 11, and the front end of the adjusting screw 13 abuts against the movable frame 20. The pulley frame 1 is installed on a lower frame 51 so that a pair of wheels 40 contact a guide rail 54 of the lower frame 53. This pulley only drives the sliding door to move and does not have a labor-saving function, and cannot be adapted to heavy-duty doors. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a practical and widely adaptable labor-saving structure for a heavy-duty lifting sliding door.

[0004] To achieve the above purpose, the solution provided by the present invention is: a labor-saving structure for a heavy-duty lifting sliding door, including a front pulley group, a rear pulley group, a transmission rod, a front connecting block, a rear connecting block, and an assisting lifter. The front pulley group is connected to the front connecting block, the rear pulley group is connected to the rear connecting block, the transmission rod is connected between the front connecting block and the rear connecting block, and a positioning screw is provided on the assisting lifter. By removing the positioning screw, the assisting lifter pulls the rear pulley group towards the front pulley group.

[0005] The beneficial effects of the present invention are as follows: It realizes the auxiliary lifting of the sliding door. This structure is provided with a front pulley group, a rear pulley group, and a transmission rod. The front pulley group and the rear pulley group can slide back and forth and are connected through the transmission rod, the front connecting block, and the rear connecting block. Then, by providing an assisting lifter and removing the positioning screw, the assisting lifter pulls the rear pulley group towards the front pulley group, thereby generating an upward thrust force on the front pulley group and the rear pulley group, realizing the auxiliary lifting of the sliding door, saving the force used for lifting the sliding door, greatly reducing the pulling force of the connecting rod during lifting, that is, reducing the torque when turning the handle. The overall structure is simple, practical, and reliable, can extend the service life of the lock box for repeated opening and closing, and the structure is small and compact, with wide adaptability.

[0006] Further, the lifter includes a pull tube, a first cable plug, a second cable plug, a cable, and a compression spring. The first cable plug slides within the pull tube. One end of the cable is connected to the first cable plug, and the other end of the cable is connected to the second cable plug. The second cable plug is connected to the rear connection block. Among them, the compression spring is disposed within the pull tube and sleeved on the cable. One end of the compression spring abuts against and presses the first cable plug, and the other end of the compression spring abuts against and presses the inner wall of the pull tube. After the present invention adopts the above structure, the compression spring rebounds to push the cable to move, thereby pulling the rear pulley set towards the front pulley set.

[0007] Further, a sliding groove is formed within the pull tube. The front and rear ends of the sliding groove are closed, and a through hole is opened at the rear end of the sliding groove for the cable to pass through. The first cable plug and the compression spring are disposed within the sliding groove.

[0008] Further, a positioning block is slidably connected within the sliding groove. The first cable plug abuts against and presses the positioning block. The pull tube is provided with a second positioning hole that communicates with the sliding groove. The positioning screw passes through the second positioning hole and is connected to the positioning block. After the present invention adopts the above structure, the compression of the compression spring can be maintained before the positioning block is removed.

[0009] Further, the transmission rod is provided with a first positioning hole for the vertical pipe transmission rod, and the first positioning hole is for the positioning screw to pass through.

[0010] Further, the rear connection block is provided with a limiting groove, and the second cable plug is disposed within the limiting groove.

[0011] Further, the front pulley set includes a liftable lifting frame, a first front frame, a swing frame, a first connecting rod, and a second front frame. The front side of the first front frame is slidably connected to the lifting frame. The lifting frame is hinged to the swing frame, and the first front frame is hinged to the swing frame. One end of the first connecting rod is hinged to the swing frame, and the other end of the first connecting rod is hinged to the second front frame. The second front frame moves back and forth within the first front frame, and the rear end of the second front frame is connected to the front connection block. After the present invention adopts the above structure, the second front frame moves forward to push the first front frame upward.

[0012] Further, the hinge points between the lifting frame and the swing frame, between the first front frame and the swing frame, and between the first connecting rod and the swing frame together form a triangular structure.

[0013] Further, a plurality of front rollers are rotatably connected to the second front frame. After the present invention adopts the above structure, the resistance of the second front frame during movement is reduced.

[0014] Further, a first sliding member is formed on the side wall of the second front frame, a first sliding groove is formed in the first front frame, the first sliding groove extends obliquely downward, and the first sliding member slides in the first sliding groove. After the present invention adopts the above structure, the first front frame is guided to move upward.

[0015] Further, the rear pulley group includes a first rear frame and a second rear frame, the second rear frame moves back and forth within the first rear frame, and the front end of the second front frame is connected to a rear connecting block.

[0016] Further, a plurality of rear rollers are rotatably connected to the second rear frame. After the present invention adopts the above structure, the resistance of the second rear frame moving is reduced.

[0017] Further, a second sliding member is formed on the side wall of the second rear frame, a second sliding groove is formed in the first rear frame, the second sliding groove extends obliquely downward, and the second sliding member slides in the second sliding groove, wherein the extending direction of the first sliding groove is the same as that of the second sliding groove. After the present invention adopts the above structure, the first rear frame is guided to move upward. Description of the Drawings

[0018] Figure 1 is a perspective view of the overall structure of the present invention.

[0019] Figure 2 is an exploded view of the present invention.

[0020] Figure 3 is Figure 2 an enlarged view of part A in

[0021] Figure 4 is an internal structure diagram of the present invention.

[0022] Figure 5 is Figure 4 an enlarged view of part B in

[0023] Figure 6 is Figure 4 an enlarged view of part C in

[0024] Figure 7 is Figure 4 an enlarged view of part D in

[0025] Figure 8 is a state diagram of the present invention ready to be installed on a sliding door.

[0026] Figure 9 is the state of the present invention after being installed on a sliding door Figure 1 (the positioning screw is removed).

[0027] Figure 10 is the state of the present invention after being installed on a sliding door Figure 2 .

[0028] Figure 11 This is the state diagram of the present invention disassembled from the sliding door.

[0029] Among them, 11 is the lifting frame, 12 is the first front frame, 121 is the first sliding groove, 13 is the second front frame, 131 is the front roller, 132 is the first sliding block, 14 is the swing frame, 15 is the first connecting rod, 21 is the first rear frame, 211 is the second sliding groove, 22 is the second rear frame, 221 is the rear roller, 222 is the second sliding block, 3 is the transmission rod, 31 is the first positioning hole, 4 is the front connecting block, 5 is the rear connecting block, 51 is the limiting groove, 61 is the pull pipe, 611 is the sliding groove, 612 is the through hole, 613 is the second positioning hole, 62 is the first cable plug, 63 is the second cable plug, 64 is the cable, 65 is the compression spring, 66 is the positioning block, 67 is the positioning screw, and 7 is the sliding door. Detailed implementation manners

[0030] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0032] Refer to Attach Figure 1 to Attach Figure 11 As shown, a labor-saving structure for a heavy-duty lifting sliding door includes a front pulley group, a rear pulley group, a transmission rod, a front connecting block, a rear connecting block, and a lifting assist device. The front pulley group is connected to the front connecting block, the rear pulley group is connected to the rear connecting block, the transmission rod is connected between the front connecting block and the rear connecting block, and a positioning screw is provided on the lifting assist device. By removing the positioning screw, the lifting assist device pulls the rear pulley group to move towards the front pulley group.

[0033] In this embodiment, the lifter includes a pull tube, a first cable plug, a second cable plug, a cable, and a compression spring. The first cable plug slides within the pull tube. One end of the cable is connected to the first cable plug, and the other end of the cable is connected to the second cable plug. The second cable plug is connected to the rear connecting block. Among them, the compression spring is arranged within the pull tube, sleeved on the cable. One end of the compression spring abuts against and presses the first cable plug, and the other end of the compression spring abuts against and presses the inner wall of the pull tube.

[0034] In this embodiment, a sliding groove is formed within the pull tube. The front and rear ends of the sliding groove are closed, and a through hole is opened at the rear end of the sliding groove for the cable to pass through. The first cable plug and the compression spring are arranged within the sliding groove; a positioning block is slidably connected within the sliding groove. The first cable plug abuts against and presses the positioning block. The pull tube is provided with a second positioning hole, and the second positioning hole communicates with the sliding groove. The positioning screw passes through the second positioning hole and then connects to the positioning block.

[0035] In this embodiment, the transmission rod is provided with a first positioning hole for the vertical pipe transmission rod, and the first positioning hole is for the positioning screw to pass through.

[0036] In this embodiment, the rear connecting block is provided with a limiting groove, and the second cable plug is arranged within the limiting groove.

[0037] In this embodiment, the front pulley group includes a liftable lifting frame, a first front frame, a swing frame, a first connecting rod, and a second front frame. The front side of the first front frame is slidably connected to the lifting frame. The lifting frame is hinged to the swing frame, and the first front frame is hinged to the swing frame. One end of the first connecting rod is hinged to the swing frame, and the other end of the first connecting rod is hinged to the second front frame. The second front frame moves back and forth within the first front frame, and the rear end of the second front frame is connected to the front connecting block; a plurality of front rollers are rotatably connected to the second front frame. A first sliding element is formed on the side wall of the second front frame. The first front frame is provided with a first sliding groove that extends obliquely downward, and the first sliding element slides within the first sliding groove.

[0038] In this embodiment, a vertically extending vertical portion is formed at the front end of the first front frame, and the vertical portion allows the lifting frame to move up and down.

[0039] In this embodiment, the hinge point between the lifting frame and the swing frame, the hinge point between the first front frame and the swing frame, and the hinge point between the first connecting rod and the swing frame together form a triangular structure.

[0040] In this embodiment, the rear pulley group includes a first rear frame and a second rear frame. The second rear frame moves back and forth within the first rear frame, and the front end of the second front frame is connected to the rear connecting block; a plurality of rear rollers are rotatably connected to the second rear frame. A second sliding element is formed on the side wall of the second rear frame. The first rear frame is provided with a second sliding groove that extends obliquely downward, and the second sliding element slides within the second sliding groove, where the extending direction of the first sliding groove is the same as the extending direction of the second sliding groove.

[0041] In this embodiment, the lifting frame and the swing frame, the first front frame and the swing frame, the first connecting rod and the swing frame, the second front frame and the front connecting block, the front connecting block and the transmission rod, the rear connecting block and the transmission rod, and the rear connecting block and the second rear frame are respectively connected by riveting.

[0042] During installation, the first front frame is fixedly connected to the bottom of the sliding door by screws respectively, the pull pipe is fixedly connected to the bottom of the sliding door, the first rear frame is fixedly connected to the bottom of the sliding door, and the vertical part of the first front frame is attached to the side wall of the sliding door.

[0043] At this time, due to the action of the positioning block, the compression spring is in a compressed state. Then, the positioning screw is screwed out. After the positioning screw exits the positioning block and then sequentially exits through the second positioning hole and the first positioning hole of the transmission rod, the compression spring rebounds to push the first cable plug, the cable, and the positioning block to move, so that the cable pulls the rear connecting block and the second rear frame to move in the direction of the front pulley set; At this time, through the transmission of the transmission rod, the second front frame is pushed forward to move. Under the sliding guidance of the first slider in the first sliding groove and the second slider in the second sliding groove, the first front frame moves backward and upward, pushing the first connecting rod to swing, driving the swing frame to swing, thereby driving the first front frame to move upward relative to the lifting frame, generating an upward thrust, so as to realize assisting in lifting the sliding door and saving the force for lifting the sliding door.

[0044] The above-described embodiments are only preferred embodiments of the present invention and do not impose any form of limitation on the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make more possible changes and refinements to the technical solution of the present invention by using the disclosed technical content above, or modify it into an equivalent embodiment with equivalent changes. Therefore, all equivalent changes made according to the idea of the present invention without departing from the content of the technical solution of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A labor-saving structure for a heavy-duty lifting sliding door, comprising a front pulley group, a rear pulley group, a transmission rod, a front connecting block, a rear connecting block, and a booster, characterized in that: The front pulley set is connected to the front connection block, the rear pulley set is connected to the rear connection block, the transmission rod is connected between the front connection block and the rear connection block, and a positioning screw is provided on the lifter. By removing the positioning screw, the lifter pulls the rear pulley set towards the front pulley set.

2. The labor-saving structure of a heavy-duty lifting sliding door according to claim 1, characterized in that: The lifter includes a pull tube, a first cable plug, a second cable plug, a cable, and a compression spring. The first cable plug slides within the pull tube. One end of the cable is connected to the first cable plug, and the other end of the cable is connected to the second cable plug. The second cable plug is connected to the rear connection block. Among them, the compression spring is disposed within the pull tube, sleeved on the cable. One end of the compression spring abuts and presses against the first cable plug, and the other end of the compression spring abuts and presses against the inner wall of the pull tube.

3. The labor-saving structure of a heavy-duty lifting sliding door according to claim 2, wherein: A sliding groove is formed within the pull tube. The front and rear ends of the sliding groove are closed, and a through hole is opened at the rear end of the sliding groove for the cable to pass through. The first cable plug and the compression spring are disposed within the sliding groove.

4. The labor-saving structure of a heavy-duty lifting sliding door according to claim 3, wherein: A positioning block is slidably connected within the sliding groove. The first cable plug abuts and presses against the positioning block. The pull tube is provided with a second positioning hole that communicates with the sliding groove. The positioning screw passes through the second positioning hole and then connects to the positioning block.

5. The labor-saving structure of a heavy-duty lifting sliding door according to claim 1, wherein: The front pulley set includes a liftable lifting frame, a first front frame, a swing frame, a first connecting rod, and a second front frame. The front side of the first front frame is slidably connected to the lifting frame. The lifting frame is hinged to the swing frame, and the first front frame is also hinged to the swing frame. One end of the first connecting rod is hinged to the swing frame, and the other end of the first connecting rod is hinged to the second front frame. The second front frame moves back and forth within the first front frame, and the rear end of the second front frame is connected to the front connection block.

6. The labor-saving structure of a heavy-duty lifting sliding door according to claim 5, wherein: A plurality of front rollers are rotatably connected to the second front frame.

7. The labor-saving structure of a heavy-duty lifting sliding door according to claim 5, characterized in that: A first sliding element is formed on the side wall of the second front frame. The first front frame is provided with a first sliding groove that extends obliquely downward. The first sliding element slides within the first sliding groove.

8. The labor-saving structure of a heavy-duty lifting sliding door according to claim 1, wherein: The rear pulley set includes a first rear frame and a second rear frame. The second rear frame moves back and forth within the first rear frame. The front end of the second front frame is connected to the rear connection block.

9. The labor-saving structure of a heavy-duty lifting sliding door according to claim 8, wherein: A plurality of rear rollers are rotatably connected to the second rear frame.

10. The labor-saving structure of a heavy-duty lifting sliding door according to claim 8, characterized in that: A second sliding element is formed on the side wall of the second rear frame. The first rear frame is provided with a second sliding groove that extends obliquely downward. The second sliding element slides within the second sliding groove, and the extending direction of the first sliding groove is the same as that of the second sliding groove.

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