Hydraulic passive automatic door closing device

Abstract

The invention discloses a hydraulic passive automatic door closing device, and relates to the field of door closing devices, the hydraulic passive automatic door closing device comprises a main body shell, a hydraulic cylinder, a rotary mounting seat, a bottom connecting rod, a top sleeve rod, a top connecting rod and a door frame mounting seat, the hydraulic cylinder is fixedly mounted in the main body shell, and the rotary mounting seat is movably mounted at the upper end of the main body shell; and the bottom connecting rod is fixedly mounted at the upper end of the rotary mounting seat. According to the hydraulic passive automatic door closing device, the effect of positioning an opened door plate is achieved, the functionality of the device is increased through a simple structure, the moving stroke of a door frame mounting base is reduced, then the door plate opening stroke is reduced, the effect of adjusting the door opening stroke is achieved, the door plate is locked and cannot be opened, and the door closing effect is good. The effect of replacing a safety chain is achieved, the damping force of the hydraulic cylinder is adjusted, the force when the door is closed is changed, and an operator does not need to conduct adjustment beside the hydraulic cylinder.

Description

Technical Field

[0001] The present invention relates to the field of door closing devices, and particularly to a hydraulic passive automatic door closing device. Background Art

[0002] A hydraulic passive automatic door closing device is a device that does not require an external power source and relies on mechanical principles and liquid pressure to automatically close the door panel. It is widely used on various door panels;

[0003] Chinese Patent with the publication number "CN101135216A" discloses an "upper door closer, which includes an elongated housing. The housing has threaded plugs on each end face. The threaded plugs are provided with grooves for connecting the cover. The housing has a hole. In the hole, an opening piston is connected to a compression spring on one side, and the other side of the opening piston is connected to a transmission device". Although it can achieve the effects of "smooth external contour, greatly reducing material use and reducing problems commonly occurring in the casting process", when the device is in use, the device performs the door closing force application operation through hydraulic pressure and a connecting rod, and the positions of the device and the connecting rod are fixed. Therefore, the door closing stroke range of the device is also fixed, resulting in the inability to adjust the opening stroke range. At the same time, the device has simple functions and cannot perform door panel positioning and door panel locking. And when adjusting the door closing force, the operator needs to move to the side of the device to perform the adjustment operation. Since the installation position of the device is high, it causes trouble in adjustment, so it is not convenient to use the device. Summary of the Invention

[0004] The main purpose of the present invention is to provide a hydraulic passive automatic door closing device, which can effectively solve the technical problems raised in the background art.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A hydraulic passive automatic door closing device, comprising a main body housing, a hydraulic cylinder, a rotary mounting base, a bottom connecting rod, a top sleeve rod, a top connecting rod and a door frame mounting base. The hydraulic cylinder is fixedly installed inside the main body housing. The rotary mounting base is movably installed at the upper end of the main body housing. The bottom connecting rod is fixedly installed at the upper end of the rotary mounting base. The top sleeve rod is movably installed at the upper end of the bottom connecting rod. The top connecting rod is fixedly installed at one end of the top sleeve rod away from the bottom connecting rod. The door frame mounting base is fixedly installed at one end of the top connecting rod away from the top sleeve rod. An installation slider is fixedly installed at the rear end of the main body housing. The rear end of the installation slider is slidably connected with a guide rail rod. A pulling adjustment mechanism is fixedly installed at one side of the front end of the installation slider inside the main body housing. An adjustment knob is movably installed at one side of the main body housing. A steel wire pull rope is fixedly installed at one side of the pulling adjustment mechanism. A positioning structure is arranged below the guide rail rod. A pulling-back structure is fixedly installed at the other side of the front end of the installation slider inside the main body housing. A steel ball tube is fixedly penetrated inside the bottom connecting rod. Positioning steel balls are movably installed at both the upper end and the lower end of the steel ball tube. A top snap seat is welded at the outer bottom of the top connecting rod. A bottom snap seat is fixedly installed at the upper end of the guide rail rod.

[0007] As a further scheme of the present invention, a positioning spring is movably installed inside the steel ball tube. The positioning steel balls are embedded into the steel ball tube. The upper end and the lower end of the positioning spring are in fit connection with the positioning steel balls. The bottom snap seat and the top snap seat are respectively located below and above the steel ball tube.

[0008] As a further scheme of the present invention, the installation slider slides around the outside of the guide rail rod, and the door frame mounting base is parallel to the rear surface of the guide rail rod.

[0009] As a further scheme of the present invention, the pulling adjustment mechanism includes a pulling plate, a pulling sleeve ring and an adjusting column. The pulling plate is fixedly installed at the front end of the installation slider. The pulling sleeve ring is movably installed at the center of the pulling plate. The adjusting column is fixedly installed at one side of the pulling sleeve ring.

[0010] As a further scheme of the present invention, the pulling sleeve ring penetrates through the pulling plate. One end of the steel wire pull rope is fixedly connected with the pulling sleeve ring. The end of the adjusting column away from the pulling sleeve ring is inserted into the adjusting knob for fit connection.

[0011] As a further scheme of the present invention, a pulling ring is fixedly installed under the steel wire pull rope. A guide plate is fixedly installed at one side of the guide rail rod. The guide plate is located at one side of the pulling plate. The steel wire pull rope penetrates through the guide plate and extends downward.

[0012] As a further solution of the present invention, the positioning structure includes a pulling rope loop, a positioning mounting plate and a locking knob. The pulling rope loop is located below the guide rail rod. The positioning mounting plate is fixedly installed at the rear end of the pulling rope loop. The locking knob is threadedly installed at the front end of the pulling rope loop.

[0013] As a further solution of the present invention, the rear end of the positioning mounting plate is arranged parallel to the rear surface of the guide rail rod. The steel wire pulling rope passes through the pulling rope loop. The end of the locking knob penetrates into the pulling rope loop and presses the steel wire pulling rope.

[0014] As a further solution of the present invention, the pulling-back structure includes a moving plate, a fixed plate and a pulling-back spring. The moving plate is fixedly installed at the front end of the mounting slider. The fixed plate is fixedly installed on the other side of the guide rail rod. The pulling-back spring is fixedly installed between the moving plate and the fixed plate.

[0015] As a further solution of the present invention, the moving plate is located on the other side of the main body housing. The contraction of the pulling-back spring pulls the moving plate to move towards the fixed plate.

[0016] Compared with the prior art, the present invention has the following beneficial effects: When door opening positioning is required, after the door panel is opened to the maximum position, the positioning steel balls below the steel ball tube are clamped into the top snap seat at the bottom of the top connecting rod, achieving the effect of positioning the opened door panel. When the door panel is pushed again, the applied force separates the positioning steel balls from the top snap seat and then drives the door panel to close. The functionality of the device is increased by a simple structure, making the use of the device more convenient;

[0017] When the opening stroke of the door needs to be adjusted, the positioning mounting plate is installed at the position below the door panel and the guide rail rod, enabling the operator to conveniently pull the pulling ring. Then, the installation slider is pulled to slide around the guide rail rod through the steel wire pulling rope, changing the position of the installation slider, thereby changing the positions of the upper top sleeve rod, the top connecting rod and the bottom connecting rod. Therefore, when the top sleeve rod, the top connecting rod and the bottom connecting rod extend, they extend obliquely with respect to the door frame mounting seat, reducing the moving stroke of the door frame mounting seat, and further reducing the opening stroke of the door panel, achieving the effect of adjusting the opening stroke of the door, facilitating the opening and closing of the door to different degrees, and the steel wire pulling rope is located in the middle of the door, making the operation more convenient;

[0018] After the steel wire pulling rope is released, the contraction of the pulling-back spring pulls the installation slider to slide in the reverse direction. When the movement of the installation slider drives the bottom connecting rod and the top connecting rod to overlap, the positioning steel balls above the steel ball tube are clamped into the top snap seat at the bottom of the top connecting rod to position the bottom connecting rod and the top connecting rod. Therefore, when the door panel is pulled again, the overlapping top sleeve rods cannot rotate around the bottom connecting rod, locking the door panel and preventing it from being opened, achieving the effect of replacing the safety chain, not only increasing the function of the device, but also making the operation safer;

[0019] When it is necessary to adjust the damping force of the adjusting hydraulic cylinder, directly rotating the pulling ring can drive the wire rope to rotate. The wire rope then drives the pulling collar and the adjusting column to rotate. Since the adjusting column is inserted into the adjusting knob, it can directly drive the adjusting knob to rotate, adjust the damping force of the adjusting hydraulic cylinder, and change the closing force. There is no need for the operator to adjust beside the hydraulic cylinder, making it more convenient to adjust and change the closing force. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a schematic diagram of the overall structure of a hydraulic passive automatic door closing device of the present invention;

[0021] Figure 2 FIG. is an enlarged view of the main body housing in a hydraulic passive automatic door closing device of the present invention;

[0022] Figure 3 FIG. is a side view of the main body housing in a hydraulic passive automatic door closing device of the present invention;

[0023] Figure 4 FIG. is an anatomical view of the bottom connecting rod and the steel ball tube in a hydraulic passive automatic door closing device of the present invention;

[0024] Figure 5 FIG. is an enlarged view of the positioning structure in a hydraulic passive automatic door closing device of the present invention;

[0025] Figure 6 FIG. is a rotation diagram of the bottom connecting rod and the top sleeve rod in a hydraulic passive automatic door closing device of the present invention.

[0026] In the figure: 1, main body housing; 2, hydraulic cylinder; 3, rotary mounting seat; 4, bottom connecting rod; 5, steel ball tube; 6, positioning steel ball; 7, positioning spring; 8, top sleeve rod; 9, top connecting rod; 10, door frame mounting seat; 11, top snap seat; 12, mounting slider; 13, guide rail rod; 14, pulling-back structure; 15, moving plate; 16, fixing plate; 17, pulling-back spring; 18, bottom snap seat; 19, adjusting knob; 20, pulling adjustment mechanism; 21, pulling plate; 22, pulling collar; 23, adjusting column; 24, wire rope; 25, guide plate; 26, pulling ring; 27, positioning structure; 28, rope sleeve ring; 29, positioning mounting plate; 30, locking knob. DETAILED DESCRIPTION OF THE INVENTION

[0027] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0028] Such as Figures 1 - 6As shown in the figure, a hydraulic passive automatic door closing device includes a main body housing 1, a hydraulic cylinder 2, a rotary mounting seat 3, a bottom connecting rod 4, a top sleeve rod 8, a top connecting rod 9 and a door frame mounting seat 10. The hydraulic cylinder 2 is fixedly installed inside the main body housing 1. The rotary mounting seat 3 is movably installed at the upper end of the main body housing 1. The bottom connecting rod 4 is fixedly installed at the upper end of the rotary mounting seat 3. The top sleeve rod 8 is movably installed at the upper end of the bottom connecting rod 4. The top connecting rod 9 is fixedly installed at one end of the top sleeve rod 8 away from the bottom connecting rod 4. The door frame mounting seat 10 is fixedly installed at one end of the top connecting rod 9 away from the top sleeve rod 8. An installation slider 12 is fixedly installed at the rear end of the main body housing 1. A guide rail rod 13 is slidably connected to the rear end of the installation slider 12. A pulling adjustment mechanism 20 is fixedly installed on one side of the front end of the installation slider 12 and located inside the main body housing 1. An adjustment knob 19 is movably installed on one side of the main body housing 1. A steel wire pull rope 24 is fixedly installed on one side of the pulling adjustment mechanism 20. A positioning structure 27 is arranged below the guide rail rod 13. A pulling-back structure 14 is fixedly installed on the other side of the front end of the installation slider 12 and located inside the main body housing 1. A steel ball tube 5 is fixedly penetrated inside the bottom connecting rod 4. Positioning steel balls 6 are movably installed at both the upper and lower ends of the steel ball tube 5. A top snap seat 11 is welded to the outer bottom of the top connecting rod 9. A bottom snap seat 18 is fixedly installed at the upper end of the guide rail rod 13.

[0029] In this embodiment, a positioning spring 7 is movably installed inside the steel ball tube 5. The positioning steel balls 6 are embedded into the steel ball tube 5. The upper and lower ends of the positioning spring 7 are in fit connection with the positioning steel balls 6. The bottom snap seat 18 and the top snap seat 11 are respectively located below and above the steel ball tube 5. The positioning spring 7 pushes the positioning steel balls 6 to protrude outwards, so that the positioning steel balls 6 are firmly pushed into the bottom snap seat 18 and the top snap seat 11 for connection.

[0030] As a further solution of the present invention, the installation slider 12 slides around the outside of the guide rail rod 13. The door frame mounting seat 10 is parallel to the rear surface of the guide rail rod 13. The guide rail rod 13 plays an effect of movably installing the installation slider 12.

[0031] As a further solution of the present invention, the pulling adjustment mechanism 20 includes a pulling plate 21, a pulling collar 22 and an adjustment column 23. The pulling plate 21 is fixedly installed at the front end of the installation slider 12. The pulling collar 22 is movably installed at the center of the pulling plate 21. The adjustment column 23 is fixedly installed on one side of the pulling collar 22. The pulling collar 22 penetrates through the pulling plate 21. One end of the steel wire pull rope 24 is fixedly connected to the pulling collar 22. The end of the adjustment column 23 away from the pulling collar 22 is inserted into the adjustment knob 19 for fit connection. The steel wire pull rope 24 drives the pulling collar 22 and the adjustment column 23 to rotate, and the adjustment column 23 then drives the adjustment knob 19 to rotate.

[0032] As a further solution of the present invention, a pulling ring 26 is fixedly installed under the wire rope 24, and the pulling ring 26 has the effect of operating the wire rope 24. A guide plate 25 is fixedly installed on one side of the guide rod 13. The guide plate 25 is located on one side of the pulling plate 21. The wire rope 24 passes through the guide plate 25 and extends downward. The guide plate 25 is used to guide the wire rope 24 downward.

[0033] As a further solution of the present invention, the positioning structure 27 includes a pull rope ring 28, a positioning mounting plate 29 and a locking knob 30. The pull rope ring 28 is located below the guide rod 13, the positioning mounting plate 29 is fixedly installed at the rear end of the pull rope ring 28, and the locking knob 30 is threadedly installed at the front end of the pull rope ring 28.

[0034] As a further solution of the present invention, the rear end of the positioning mounting plate 29 is arranged parallel to the rear surface of the guide rail rod 13, the wire rope 24 passes through the rope ring 28, the end of the locking knob 30 is inserted into the rope ring 28 and presses the wire rope 24, the rope ring 28 guides the wire rope 24, and the locking knob 30 fixes the wire rope 24 by pressing it.

[0035] As a further solution of the present invention, the pull-back structure 14 includes a movable plate 15, a fixed plate 16 and a pull-back spring 17. The movable plate 15 is fixedly installed at the front end of the mounting slider 12, the fixed plate 16 is fixedly installed on the other side of the guide rod 13, and the pull-back spring 17 is fixedly installed between the movable plate 15 and the fixed plate 16. The movable plate 15 is located on the other side of the main shell 1. The pull-back spring 17 contracts and pulls the movable plate 15 toward the fixed plate 16. When the mounting slider 12 moves to one side, the pull-back spring 17 will extend. When the wire rope 24 releases the pull on the mounting slider 12, the pull-back spring 17 will rebound and contract.

[0036] It should be noted that the present invention is a hydraulic passive automatic door closing device. When in use, the door frame mounting seat 10 is mounted on the door frame, and the guide rod 13 is mounted on the door panel. When the door panel is opened, the top sleeve rod 8 and the top connecting rod 9 are pulled to rotate around the bottom connecting rod 4, and one end of the bottom connecting rod 4 pulls the rotating mounting seat 3 to rotate, so that the top sleeve rod 8, the top connecting rod 9 and the bottom connecting rod 4 are stretched from the folded state. In coordination with the movement of the door panel, the rotating mounting seat 3 rotates to squeeze the piston in the hydraulic cylinder 2 to move and compress the hydraulic oil for energy storage. After the door panel moves, the hydraulic pressure in the hydraulic cylinder 2 releases energy to drive the piston to reset, thereby driving the rotating mounting seat 3 to reverse, and the rotating mounting seat 3 then drives the top sleeve rod 8, the top connecting rod 9 and the bottom connecting rod 4 to rotate to the folded state, thereby pulling the door panel to reset to the door frame for closing.

[0037] When door opening positioning is required, after the door panel is opened to the maximum position, the top sleeve rod 8, the top connecting rod 9 and the bottom connecting rod 4 extend to the longest. The positioning steel ball 6 below the steel ball tube 5 is snapped into the top snap seat 11 at the bottom of the top connecting rod 9 to position the bottom connecting rod 4. At the same time, the positioning spring 7 presses tightly on the positioning steel ball 6, so that the reverse force of the rotating mounting seat 3 cannot separate the positioning steel ball 6 from the top snap seat 11, thus achieving the effect of positioning the opened door panel. When the door panel is pushed again, the applied force separates the positioning steel ball 6 from the top snap seat 11, and then the rotating mounting seat 3 reverses to drive the door panel to close;

[0038] When the opening stroke of the door needs to be adjusted, the positioning mounting plate 29 is installed at the position below the door panel where the guide rail rod 13 is located, so that the operator can conveniently pull the pulling ring 26. Then, the steel wire pull rope 24 is pulled through the pulling ring 26. The steel wire pull rope 24 is connected to the pulling sleeve ring 22, and the pulling mounting slider 12 slides around the guide rail rod 13 to change the position of the mounting slider 12, thereby changing the positions of the upper top sleeve rod 8, the top connecting rod 9 and the bottom connecting rod 4. Then, the locking knob 30 is tightened to position the steel wire pull rope 24, and the door frame mounting seat 10 rotates around the top connecting rod 9 with the position unchanged. Therefore, when the top sleeve rod 8, the top connecting rod 9 and the bottom connecting rod 4 are extended, they are inclined and extended with respect to the door frame mounting seat 10, reducing the moving stroke of the door frame mounting seat 10, and further reducing the opening stroke of the door panel, achieving the effect of adjusting the opening stroke;

[0039] After the steel wire pull rope 24 is loosened, the return spring 17 contracts to pull the moving plate 15 to move, thereby pulling the mounting slider 12 to slide in the reverse direction. When the movement of the mounting slider 12 drives the bottom connecting rod 4 and the top connecting rod 9 to overlap, the positioning steel ball 6 above the steel ball tube 5 is snapped into the top snap seat 11 at the bottom of the top connecting rod 9 to position the bottom connecting rod 4 and the top connecting rod 9, so that the bottom connecting rod 4 and the top connecting rod 9 are arranged in parallel and overlapping up and down. Then, the locking knob 30 is tightened to position the steel wire pull rope 24. Therefore, when the door panel is pulled again, the overlapping top sleeve rod 8 cannot rotate around the bottom connecting rod 4, locking the door panel and preventing it from being opened, achieving the effect of replacing the safety chain;

[0040] When the damping force of the adjusting hydraulic cylinder 2 needs to be adjusted, the adjusting knob 19 is the damping adjustment end of the adjusting hydraulic cylinder 2. By directly rotating the pulling ring 26, the steel wire pull rope 24 can be driven to rotate. The steel wire pull rope 24 then drives the pulling sleeve ring 22 and the adjusting column 23 to rotate. Since the adjusting column 23 is inserted into the adjusting knob 19, the adjusting knob 19 can be directly driven to rotate to adjust the damping force of the adjusting hydraulic cylinder 2 and change the magnitude of the force when closing the door.

[0041] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification is only to illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A hydraulic passive automatic door closing device, comprising a main body shell (1), a hydraulic cylinder (2), a rotating mounting seat (3), a bottom connecting rod (4), a top sleeve rod (8), a top connecting rod (9) and a door frame mounting seat (10), wherein the hydraulic cylinder (2) is fixedly mounted inside the main body shell (1), the rotating mounting seat (3) is movably mounted on the upper end of the main body shell (1), the bottom connecting rod (4) is fixedly mounted on the upper end of the rotating mounting seat (3), the top sleeve rod (8) is movably mounted on the upper end of the bottom connecting rod (4), the top connecting rod (9) is fixedly mounted on one end of the top sleeve rod (8) away from the bottom connecting rod (4), and the door frame mounting seat (10) is fixedly mounted on one end of the top connecting rod (9) away from the top sleeve rod (8), characterized in that: The rear end of the main shell (1) is fixedly installed with a mounting slide block (12), and the rear end of the mounting slide block (12) is slidably connected with a guide rail rod (13). The front end of the mounting slide block (12) is located on one side of the main shell (1) and is fixedly installed with a pulling adjustment mechanism (20). An adjusting knob (19) is movably installed on one side of the main shell (1). A steel wire rope (24) is fixedly installed on one side of the pulling adjustment mechanism (20). A positioning structure (27) is arranged below the guide rail rod (13). The front end of the mounting slide block (12) is located on the other side of the main shell (1) and is fixedly installed with a pullback structure (14). A steel ball tube (5) is fixedly passed through the interior of the bottom connecting rod (4), and positioning steel balls (6) are movably installed at the upper and lower ends of the steel ball tube (5). A top buckle seat (11) is welded to the outer bottom of the top connecting rod (9), and a bottom buckle seat (18) is fixedly installed at the upper end of the guide rail rod (13).

2. A hydraulic passive automatic door closing device according to claim 1, characterized in that: A positioning spring (7) is movably installed inside the steel ball tube (5), and the positioning steel ball (6) is embedded in the steel ball tube (5). The upper and lower ends of the positioning spring (7) are closely connected to the positioning steel ball (6), and the bottom buckle seat (18) and the top buckle seat (11) are respectively located below and above the steel ball tube (5).

3. The hydraulic passive automatic door closing device according to claim 1, characterized in that: The installation slide block (12) slides around the outside of the guide rail rod (13), and the door frame installation seat (10) is parallel to the rear surface of the guide rail rod (13).

4. The hydraulic passive automatic door closing device according to claim 1, characterized in that: The pulling adjustment mechanism (20) comprises a pulling plate (21), a pulling collar (22) and an adjusting column (23); the pulling plate (21) is fixedly mounted on the front end of the mounting slide block (12); the pulling collar (22) is movably mounted on the center of the pulling plate (21); and the adjusting column (23) is fixedly mounted on one side of the pulling collar (22).

5. A hydraulic passive automatic door closing device according to claim 4, characterized in that: The pulling ring (22) passes through the pulling plate (21), one end of the steel wire rope (24) is fixedly connected to the pulling ring (22), and one end of the adjusting column (23) away from the pulling ring (22) is inserted into the adjusting knob (19) for matching connection.

6. A hydraulic passive automatic door closing device according to claim 4, characterized in that: A pulling ring (26) is fixedly installed below the steel wire rope (24), a guide plate (25) is fixedly installed on one side of the guide rail rod (13), the guide plate (25) is located on one side of the pulling plate (21), and the steel wire rope (24) passes through the guide plate (25) and extends downward.

7. The hydraulic passive automatic door closing device according to claim 1, characterized in that: The positioning structure (27) includes a pull rope ring (28), a positioning mounting plate (29) and a locking knob (30), the pull rope ring (28) is located below the guide rail rod (13), the positioning mounting plate (29) is fixedly mounted on the rear end of the pull rope ring (28), and the locking knob (30) is threadedly mounted on the front end of the pull rope ring (28).

8. The hydraulic passive automatic door closing device according to claim 7, characterized in that: The rear end of the positioning mounting plate (29) is arranged parallel to the rear surface of the guide rail rod (13), the wire rope (24) passes through the rope ring (28), and the end of the locking knob (30) is inserted into the rope ring (28) and presses the wire rope (24).

9. The hydraulic passive automatic door closing device according to claim 1, characterized in that: The pull-back structure (14) comprises a movable plate (15), a fixed plate (16) and a pull-back spring (17); the movable plate (15) is fixedly mounted on the front end of the mounting slide block (12); the fixed plate (16) is fixedly mounted on the other side of the guide rail rod (13); and the pull-back spring (17) is fixedly mounted between the movable plate (15) and the fixed plate (16).

10. A hydraulic passive automatic door closing device according to claim 9, characterized in that: The movable plate (15) is located at the other side of the main housing (1), and the return spring (17) contracts to pull the movable plate (15) toward the fixed plate (16).

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