Door closer capable of being automatically closed by elastic force

Abstract

The utility model relates to the technical field of door closers, and discloses a door closer capable of automatically closing by elastic force, which comprises a door frame and a movable door, a mounting component is fixedly mounted on the door frame, an automatic closing component is arranged between the movable door and the mounting component, the mounting component comprises a door shoe, a rotating part is rotatably connected onto the surface of the door shoe, and the rotating part is fixedly connected with the door frame. One end of the rotating part is movably connected with a front arm, one end of the front arm is internally and movably connected with a damper connecting rod, the automatic closing assembly comprises a mounting box body, when the movable door is opened, the main arm drives a gear shaft to rotate, a rotating gear rotates and is meshed with a rack plate, then a telescopic spring is compressed to store energy, and the telescopic spring rebounds after external force disappears; the movable chamber is pushed, the rotating gear is driven to rotate reversely, the main arm is driven through the gear shaft, the movable door is automatically closed, meanwhile, the damper connecting rod cooperates with the front arm and the main arm, the closing speed of the movable door is buffered, abrasion to a door frame is reduced, noise is lowered, and the service life of the door closer is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of door closer technology, and in particular to a door closer that closes automatically by means of elasticity. Background Technology

[0002] In modern building environments, proper door control is crucial for space utilization, security, and energy management. Door closers, which rely on spring force to automatically close, are a key component of door control systems. Their development has been driven by many factors. In the early days, door closing mainly relied on manual operation. This method was inefficient and prone to incomplete closure in frequently used scenarios. With the expansion of building scale and the diversification of functions, especially in places with high personnel flow such as large commercial buildings and office buildings, the demand for automatic door closing has become increasingly urgent. To solve these problems, door closers have emerged.

[0003] Most existing door closers have simple structures, poor closing speed and buffering effect, which can easily lead to a large impact force when the door closes. This can cause wear and tear on the door and frame, shorten their service life, and may also generate a lot of noise, affecting the comfort of the indoor environment. Therefore, we propose a door closer that closes automatically by spring force. Utility Model Content

[0004] The purpose of this utility model is to provide a door closer that automatically closes by spring force, in order to solve the problem that most existing door closers have simple structures, poor closing speed and buffering effect, which easily lead to a large impact force when the door is closed. This not only causes wear and tear on the door body and door frame and shortens the service life, but may also generate a lot of noise and affect the comfort of the indoor environment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a door closer that automatically closes by elastic force, comprising a door frame and a movable door, wherein an installation assembly is fixedly installed on the door frame, and an automatic closing assembly is provided between the movable door and the installation assembly, the installation assembly comprising a door shoe, a rotating component rotatably connected to the surface of the door shoe, a forearm movably connected to one end of the rotating component, a damper connecting rod movably connected inside one end of the forearm, and a main arm rotatably connected to the end of the damper connecting rod away from the forearm, and the automatic closing assembly comprising an installation box and a rotating gear.

[0006] As a preferred embodiment, the door shoe is fixedly installed on the door frame by two sets of locking bolts, and a limit block is fixedly installed at one end of the damper connecting rod inside the forearm.

[0007] As a preferred embodiment, the mounting box is fixedly installed on the surface of the movable door, and a movable chamber is slidably connected inside the mounting box. A telescopic spring is fixedly installed between the left outer wall of the movable chamber and the left inner wall of the mounting box. A needle roller bearing is fixedly installed at the bottom of the rotating gear, and the needle roller bearing is rotatably connected to the inner bottom surface of the mounting box.

[0008] As a preferred embodiment, a gear shaft is fixedly installed on the top of the rotating gear, and the upper end of the gear shaft is rotatably connected to the inside of one end of the main arm. A rack plate is fixedly installed on the inner wall of the active chamber.

[0009] As a preferred embodiment, the gear shaft is disposed inside the active chamber, and the gear shaft is meshed with the rack plate.

[0010] As a preferred embodiment, the mounting box is equipped with an oil injection lubrication assembly, which includes a hydraulic oil injection pipe fixedly installed on the top of the mounting box, an oil storage pipe fixedly installed at the bottom of the hydraulic oil injection pipe and inside the mounting box, and multiple sets of equally spaced oil drip nozzles fixedly installed on the bottom circumferential surface of the oil storage pipe, and a sealing oil cap provided at the upper end of the hydraulic oil injection pipe.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. By setting up the installation components and automatic closing components, when the movable door is opened, the main arm drives the gear shaft to rotate, causing the rotating gear to rotate and mesh with the rack plate, thereby compressing the telescopic spring to store energy. After the external force is removed, the telescopic spring rebounds, pushing the movable chamber and driving the rotating gear to rotate in the opposite direction. Through the gear shaft, it drives the main arm to realize the automatic closing of the movable door. At the same time, the damper linkage works with the front arm and the main arm to buffer the closing speed of the movable door, reduce wear between the movable door and the door frame, reduce noise, and extend the service life of the movable door and the door closer.

[0013] 2. By setting up an oil injection lubrication component, when it is necessary to lubricate the key moving parts of the door closer, hydraulic oil is injected into the oil storage pipe through the hydraulic oil injection pipe. Multiple sets of oil dripping nozzles at the bottom of the oil storage pipe will evenly drip oil onto the rotating gears, gear shafts and other components, reducing frictional resistance and wear, extending the service life of the door closer and reducing the frequency of replacement. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the installation component structure of this utility model;

[0016] Figure 3 This is a schematic diagram of the installation components and part of the automatic closing components of this utility model;

[0017] Figure 4 This is a schematic diagram of the automatic closing component structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the automatic closing component and part of the oil lubrication component of this utility model.

[0019] In the diagram: 1. Door frame; 2. Movable door; 3. Mounting assembly; 4. Automatic closing assembly; 5. Oil lubrication assembly; 301. Door shoe; 302. Locking bolt; 303. Rotating component; 304. Front arm; 305. Damper connecting rod; 306. Main arm; 401. Mounting box; 402. Movable chamber; 403. Telescopic spring; 404. Rotating gear; 405. Gear shaft; 406. Rack plate; 501. Hydraulic oil injection pipe; 502. Oil reservoir pipe; 503. Oil drip port; 504. Sealing oil cap. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] Please see the appendix Figure 1 - Appendix Figure 5A door closer that automatically closes by elastic force includes a door frame 1 and a movable door 2. An installation assembly 3 is fixedly installed on the door frame 1. An automatic closing assembly 4 is provided between the movable door 2 and the installation assembly 3. The installation assembly 3 includes a door shoe 301. A rotating component 303 is rotatably connected to the surface of the door shoe 301. One end of the rotating component 303 is movably connected to a front arm 304. A damper connecting rod 305 is movably connected to the interior of one end of the front arm 304. The end of the damper connecting rod 305 away from the front arm 304 is rotatably connected to a main arm 306. The automatic closing assembly 4 includes an installation housing 401 and a rotating gear 404. The door shoe 301 is fixedly installed on the door frame 1 by two sets of locking bolts 302. One end of the damper connecting rod 305 is located inside the front arm 304. A limiting block is fixedly installed in the part. The mounting box 401 is fixedly installed on the surface of the movable door 2. The movable chamber 402 is slidably connected inside the mounting box 401. A telescopic spring 403 is fixedly installed between the left outer wall of the movable chamber 402 and the left inner wall of the mounting box 401. A needle roller bearing is fixedly installed at the bottom of the rotating gear 404 and is rotatably connected to the inner bottom surface of the mounting box 401. A gear shaft 405 is fixedly installed at the top of the rotating gear 404 and is rotatably connected to the inside of one end of the main arm 306. A rack plate 406 is fixedly installed on the inner wall of the movable chamber 402. The gear shaft 405 is located inside the movable chamber 402 and is meshed with the rack plate 406.

[0023] The door shoe 301 is fixedly installed on the door frame 1 by two sets of locking bolts 302. The installation method is simple and stable. This installation method facilitates the installation and disassembly of the door closer, and facilitates later maintenance, replacement and other operations, thus improving work efficiency. The mounting box 401 is fixed on the surface of the movable door 2. The internal structure is compact. The rotating gear 404 is rotatably connected to the bottom surface of the mounting box 401 through the bottom needle roller bearing. It closely cooperates with the movable chamber 402, rack plate 406 and other components. It occupies little space and can be adapted to a variety of different types of doors. The limiting block at one end of the damper connecting rod 305 plays a limiting role to prevent the movable door 2 from being opened too much and the telescopic spring 403 from being over-compressed, causing a decrease in elasticity and affecting the automatic closing effect.

[0024] Specifically, when the movable door 2 is opened, the main arm 306 drives the gear shaft 405 to rotate, which in turn drives the rotating gear 404 to rotate. The rotating gear 404 meshes with the rack plate 406, causing the movable chamber 402 to compress the telescopic spring 403. After the external force of the movable door 2 is removed, the telescopic spring 403 rebounds, pushing the movable chamber 402 to move, which in turn drives the rotating gear 404 to rotate in the opposite direction. Through the gear shaft 405, the main arm 306 is driven to achieve automatic closing of the movable door 2, ensuring that the door can reliably close automatically. The damper linkage 305 effectively plays a buffering role. During the closing process of the movable door 2, the damper linkage 305 works in conjunction with the front arm 304 and the main arm 306 to slow down the closing speed of the movable door 2, avoiding excessive impact force when the door closes, reducing the collision and wear between the movable door 2 and the door frame 1, extending the service life of the movable door 2 and the door closer, and reducing closing noise to create a quiet operating environment.

[0025] Example 2:

[0026] Please see the appendix Figure 1 and appendix Figure 4 - Appendix Figure 5 Furthermore, based on Embodiment 1, the installation box 401 is provided with an oil injection lubrication assembly 5 inside. The oil injection lubrication assembly 5 includes a hydraulic oil injection pipe 501 fixedly installed on the top of the installation box 401. An oil storage pipe 502 is fixedly installed at the bottom of the hydraulic oil injection pipe 501 and inside the installation box 401. Multiple sets of equally spaced oil drip nozzles 503 are fixedly installed on the bottom circumferential surface of the oil storage pipe 502. A sealing oil cap 504 is provided at the upper end of the hydraulic oil injection pipe 501.

[0027] Good lubrication ensures smoother operation of the door closer. During the opening and closing of the movable door 2, lubricated components can work together more smoothly, avoiding problems such as jamming and abnormal noise caused by excessive friction. This ensures that the automatic closing function of the door closer remains stable and can work reliably under long-term use or frequent operation. The sealing oil cap 504 at the upper end of the hydraulic oil injection pipe 501 not only prevents hydraulic oil leakage but also facilitates the operator to replenish the hydraulic oil regularly. When lubrication maintenance is required, simply open the sealing oil cap 504 and add hydraulic oil through the hydraulic oil injection pipe 501. The operation is simple and convenient, reducing the difficulty of door closer maintenance.

[0028] Specifically, when lubrication is needed for the key moving parts of the door closer, hydraulic oil is injected into the oil reservoir 502 through the hydraulic oil injection pipe 501. The multiple sets of oil drip nozzles 503 at the bottom of the oil reservoir 502 evenly drip the oil onto the rotating gear 404, gear shaft 405 and other components inside the mounting box 401, reducing the frictional resistance of these components during operation, reducing wear, and thus effectively extending the overall service life of the door closer and reducing the trouble caused by frequent door closer replacements.

[0029] Working principle of this utility model: This utility model is a door closer that automatically closes by elastic force. When the movable door 2 is opened, the main arm 306 moves with the opening of the door, driving the connected gear shaft 405 to rotate. The gear shaft 405 then drives the rotating gear 404 to rotate. Since the rotating gear 404 meshes with the rack plate 406 fixed to the inner wall of the movable chamber 402, the rotation of the rotating gear 404 will cause the movable chamber 402 to compress the telescopic spring 403, storing elastic potential energy in the process. When the external force of opening the movable door 2 disappears, the telescopic spring 403 begins to rebound, pushing the movable chamber 402 to move. The movement of the movable chamber 402 then drives the rotating gear 404 to rotate in the opposite direction. The rotating gear 404 then drives the main arm 306 through the gear shaft 405, ultimately closing the movable door 2. Automatic closing: During the closing process of the movable door 2, the damper linkage 305 works in conjunction with the front arm 304 and the main arm 306 to effectively slow down the closing speed of the movable door 2, avoid generating a large impact force when the movable door 2 closes, reduce the collision and wear between the movable door 2 and the door frame 1, extend the service life of the movable door 2 and the door closer, and also reduce closing noise. In addition, to ensure the proper operation of the key moving parts of the door closer, hydraulic oil can be injected into the oil storage pipe 502 through the hydraulic oil injection pipe 501. The multiple sets of oil dripping nozzles 503 at the bottom of the oil storage pipe 502 will evenly drip oil onto the rotating gear 404, gear shaft 405 and other components inside the mounting box 401, reducing the frictional resistance of these components during operation, reducing wear, and further extending the overall service life of the door closer. At this point, the entire process is complete.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A door closer of the type which is activated by the force of the closing door, comprising a door frame (1) and a movable door (2), characterized in that: The door frame (1) is fixedly installed with an installation assembly (3), an automatic closing assembly (4) is arranged between the movable door (2) and the installation assembly (3), the installation assembly (3) comprises a door shoe (301), a rotating piece (303) is rotatably connected to the surface of the door shoe (301), one end of the rotating piece (303) is movably connected with a forearm (304), the inside of one end of the forearm (304) is movably connected with a damper connecting rod (305), one end of the damper connecting rod (305) away from the forearm (304) is rotatably connected with a main arm (306), the automatic closing assembly (4) comprises an installation box body (401) and a rotating gear (404).

2. A door closer according to claim 1, wherein: The door shoe (301) is fixedly installed on the door frame (1) through two groups of locking bolts (302), one end of the damper connecting rod (305) and inside the forearm (304) is fixedly installed with a limiting block.

3. A door closer according to claim 1, wherein: The installation box body (401) is fixedly installed on the surface of the movable door (2), the inside of the installation box body (401) is slidably connected with a movable chamber (402), the left side outer wall of the movable chamber (402) and the left side inner wall of the installation box body (401) are fixedly installed with a telescopic spring (403), the bottom of the rotating gear (404) is fixedly installed with a needle bearing, and the needle bearing is rotatably connected to the inside bottom surface of the installation box body (401).

4. A door closer according to claim 3, wherein: The top of the rotating gear (404) is fixedly installed with a gear shaft (405), and the upper end of the gear shaft (405) is rotatably connected to one end of the inside of the main arm (306), the inner wall of the movable chamber (402) is fixedly installed with a rack plate (406).

5. A closur according to claim 4, wherein: The gear shaft (405) is arranged in the inside of the movable chamber (402), and the gear shaft (405) is meshingly connected with the rack plate (406).

6. A door closer according to claim 1, wherein: The inside of the installation box body (401) is provided with an oil injection lubricating assembly (5), the oil injection lubricating assembly (5) comprises a hydraulic oil injection pipe (501) fixedly installed on the top of the installation box body (401), the bottom of the hydraulic oil injection pipe (501) and inside the installation box body (401) is fixedly installed with an oil storage pipe (502), the bottom end circumferential surface of the oil storage pipe (502) is fixedly installed with a plurality of oil dripping openings (503) distributed at equal intervals, and the upper end of the hydraulic oil injection pipe (501) is provided with a sealing oil cover (504).

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